* [Qemu-devel] [PATCH v8 00/28] x86: Secure Encrypted Virtualization (AMD)
@ 2018-02-12 15:36 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh
This patch series provides support for AMD's new Secure Encrypted
Virtualization (SEV) feature.
SEV is an extension to the AMD-V architecture which supports running
multiple VMs under the control of a hypervisor. The SEV feature allows
the memory contents of a virtual machine (VM) to be transparently encrypted
with a key unique to the guest VM. The memory controller contains a
high performance encryption engine which can be programmed with multiple
keys for use by a different VMs in the system. The programming and
management of these keys is handled by the AMD Secure Processor firmware
which exposes a commands for these tasks.
The KVM SEV patch series introduced a new ioctl (KVM_MEMORY_ENCRYPTION_OP)
which is used by qemu to issue the SEV commands to assist performing
common hypervisor activities such as a launching, running, snapshooting,
migration and debugging guests.
The following links provide additional details:
AMD Memory Encryption whitepaper:
http://amd-dev.wpengine.netdna-cdn.com/wordpress/media/2013/12/AMD_Memory_Encryption_Whitepaper_v7-Public.pdf
AMD64 Architecture Programmer's Manual:
http://support.amd.com/TechDocs/24593.pdf
SME is section 7.10
SEV is section 15.34
Secure Encrypted Virutualization Key Management:
http://support.amd.com/TechDocs/55766_SEV-KM API_Specification.pdf
KVM Forum slides:
http://www.linux-kvm.org/images/7/74/02x08A-Thomas_Lendacky-AMDs_Virtualizatoin_Memory_Encryption_Technology.pdf
Video of the KVM Forum Talk:
https://www.youtube.com/watch?v=RcvQ1xN55Ew
---
The complete patch series is available :
https://github.com/codomania/qemu/tree/v8
Using these patches we have succesfully booted and tested a guest both with and
without SEV enabled.
TODO:
* Add SEV guest migration support
* Add SEV guest snapshot and restore support
Changes since v8:
- move sev.c from accel/kvm to target/i386
- update query-sev-launch-measure to return error when measurement is not available
- update flatview_read to use slow path when attrs.debug=1 is set
- fix the buffer overflow
- use '-' when adding new member in SevInfo QMP structure
Changes since v6:
- add support to specify cbitpos in sev-guest object
- add 'info sev' HMP command
- add 'query-sev' and 'query-launch-measure' QMP commands
- rework the logic to query the memory encryption mask when walking
guest pagetable for debug
Changes since v5:
- drop MEMTXTATTRS_DEBUG macro, caller now specify attrs.debug=1 when needed.
- drop DPRINTF and use trace points to output the debug messages
Changes since v4:
- extend sev-guest object to add new properties 'dh-cert-file', 'session-file' etc.
- emit SEV_MEASUREMENT event when measurement is available
- add migration blocker
- add memory encryption cpuid support
- rebase the series with recent qemu tree
Changes since v3:
- update to newer SEV spec (0.12 -> 0.14)
- update to newer KVM RFC and use KVM_MEMORY_ENCRYPTION_OP ioctl instead
of KVM_ISSUE_SEV.
- add support to encrypt plfash
Changes since v2:
- rename ram_ops to ram_debug_ops
- use '-' rather than '_' when adding new member in KvmInfo struct
- update sev object to use link properties when referencing other objects
- use ldq_phys_debug in tlb_info_64 and mem_info_64.
- remove sev-guest-policy object, we will revisit it after basic SEV
guest support is merged.
- remove kernel API from doc and add SEV guest LAUNCH model. The doc will
be updated as we integerate the remaining SEV APIs.
Changes since v1:
- Added Documentation
- Added security-policy object.
- Drop sev config parsing support and create new objects to get/set SEV
specific parameters
- Added sev-guest-info object.
- Added sev-launch-info object.
- Added kvm_memory_encrytion_* APIs. The idea behind this was to allow adding
a non SEV memory encrytion object without modifying interfaces.
- Drop patch to load OS image at fixed location.
- updated LAUNCH_FINISH command structure. Now the structure contains
just 'measurement' field. Other fields are not used and will also be removed
from newer SEV firmware API spec.
Brijesh Singh (28):
memattrs: add debug attribute
exec: add ram_debug_ops support
exec: add debug version of physical memory read and write API
monitor/i386: use debug APIs when accessing guest memory
target/i386: add memory encryption feature cpuid support
machine: add -memory-encryption property
kvm: update kvm.h to include memory encryption ioctls
docs: add AMD Secure Encrypted Virtualization (SEV)
target/i386: add Secure Encrypted Virtulization (SEV) object
sev/i386: add command to initialize the memory encryption context
sev/i386: register the guest memory range which may contain encrypted
data
kvm: introduce memory encryption APIs
qmp: add query-sev command
hmp: add 'info sev' command
sev/i386: add command to create launch memory encryption context
sev/i386: add command to encrypt guest memory region
target/i386: encrypt bios rom
sev/i386: add support to LAUNCH_MEASURE command
sev/i386: finalize the SEV guest launch flow
hw/i386: set ram_debug_ops when memory encryption is enabled
sev/i386: add debug encrypt and decrypt commands
target/i386: clear C-bit when walking SEV guest page table
include: add psp-sev.h header file
sev/i386: add support to query PLATFORM_STATUS command
sev/i386: add support to KVM_SEV_GUEST_STATUS
qmp: add query-sev-launch-measure command
tests/qmp-test: blacklist query-sev-launch-measure command
sev/i386: add migration blocker
accel/kvm/kvm-all.c | 48 +++
accel/stubs/kvm-stub.c | 14 +
cpus.c | 2 +-
disas.c | 2 +-
docs/amd-memory-encryption.txt | 109 ++++++
exec.c | 83 ++++-
hmp-commands-info.hx | 14 +
hmp.c | 19 +
hmp.h | 1 +
hw/core/machine.c | 22 ++
hw/i386/pc.c | 9 +
hw/i386/pc_sysfw.c | 19 +
include/exec/cpu-common.h | 15 +
include/exec/memattrs.h | 2 +
include/exec/memory.h | 30 +-
include/hw/boards.h | 1 +
include/sysemu/kvm.h | 25 ++
include/sysemu/sev.h | 84 +++++
linux-headers/linux/kvm.h | 90 +++++
linux-headers/linux/psp-sev.h | 142 ++++++++
monitor.c | 6 +-
qapi-schema.json | 76 ++++
qemu-options.hx | 38 ++
qmp.c | 33 ++
stubs/Makefile.objs | 1 +
stubs/sev.c | 57 +++
target/i386/Makefile.objs | 2 +-
target/i386/cpu.c | 36 ++
target/i386/cpu.h | 3 +
target/i386/helper.c | 31 +-
target/i386/monitor.c | 129 ++++---
target/i386/sev.c | 795 +++++++++++++++++++++++++++++++++++++++++
target/i386/trace-events | 11 +
tests/qmp-test.c | 2 +
34 files changed, 1868 insertions(+), 83 deletions(-)
create mode 100644 docs/amd-memory-encryption.txt
create mode 100644 include/sysemu/sev.h
create mode 100644 linux-headers/linux/psp-sev.h
create mode 100644 stubs/sev.c
create mode 100644 target/i386/sev.c
--
2.14.3
^ permalink raw reply [flat|nested] 77+ messages in thread* [PATCH v8 01/28] memattrs: add debug attribute
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:36 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
Extend the MemTxAttrs to include 'debug' flag. The flag can be used as
general indicator that operation was triggered by the debugger.
Later in the patch series we set the debug=1 when issuing a memory access
from the gdbstub or HMP commands. This patch is prerequisite to support
debugging the encrypted guest. If we see request with debug=1 then we
will need to use encryption APIs to access the guest memory.
Cc: Alistair Francis <alistair.francis@xilinx.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>
Cc: Richard Henderson <richard.henderson@linaro.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
include/exec/memattrs.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/exec/memattrs.h b/include/exec/memattrs.h
index d4a16420984b..08099e4f7e72 100644
--- a/include/exec/memattrs.h
+++ b/include/exec/memattrs.h
@@ -37,6 +37,8 @@ typedef struct MemTxAttrs {
unsigned int user:1;
/* Requester ID (for MSI for example) */
unsigned int requester_id:16;
+ /* Memory access request from the debugger */
+ unsigned int debug:1;
} MemTxAttrs;
/* Bus masters which don't specify any attributes will get this,
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 01/28] memattrs: add debug attribute
@ 2018-02-12 15:36 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh
Extend the MemTxAttrs to include 'debug' flag. The flag can be used as
general indicator that operation was triggered by the debugger.
Later in the patch series we set the debug=1 when issuing a memory access
from the gdbstub or HMP commands. This patch is prerequisite to support
debugging the encrypted guest. If we see request with debug=1 then we
will need to use encryption APIs to access the guest memory.
Cc: Alistair Francis <alistair.francis@xilinx.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>
Cc: Richard Henderson <richard.henderson@linaro.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
include/exec/memattrs.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/exec/memattrs.h b/include/exec/memattrs.h
index d4a16420984b..08099e4f7e72 100644
--- a/include/exec/memattrs.h
+++ b/include/exec/memattrs.h
@@ -37,6 +37,8 @@ typedef struct MemTxAttrs {
unsigned int user:1;
/* Requester ID (for MSI for example) */
unsigned int requester_id:16;
+ /* Memory access request from the debugger */
+ unsigned int debug:1;
} MemTxAttrs;
/* Bus masters which don't specify any attributes will get this,
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread
* [PATCH v8 02/28] exec: add ram_debug_ops support
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:36 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
Currently, the guest memory access for the debug purpose is performed
using the memcpy(). Lets extend the 'struct MemoryRegion' to include
ram_debug_ops callbacks. The ram_debug_ops can be used to override
memcpy() with something else.
The feature can be used by encrypted guest -- which can register
callbacks to override memcpy() with memory encryption/decryption APIs.
a typical usage:
mem_read(uint8_t *dst, uint8_t *src, uint32_t len, MemTxAttrs *attrs);
mem_write(uint8_t *dst, uint8_t *src, uint32_t len, MemTxAttrs *attrs);
MemoryRegionRAMReadWriteOps ops;
ops.read = mem_read;
ops.write = mem_write;
memory_region_init_ram(mem, NULL, "memory", size, NULL);
memory_region_set_ram_debug_ops(mem, ops);
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
exec.c | 43 ++++++++++++++++++++++++++++++++-----------
include/exec/memory.h | 30 +++++++++++++++++++++++++++++-
2 files changed, 61 insertions(+), 12 deletions(-)
diff --git a/exec.c b/exec.c
index e8d7b335b601..b1366f85b07b 100644
--- a/exec.c
+++ b/exec.c
@@ -3050,7 +3050,11 @@ static MemTxResult flatview_write_continue(FlatView *fv, hwaddr addr,
} else {
/* RAM case */
ptr = qemu_ram_ptr_length(mr->ram_block, addr1, &l, false);
- memcpy(ptr, buf, l);
+ if (attrs.debug && mr->ram_debug_ops) {
+ mr->ram_debug_ops->write(ptr, buf, l, attrs);
+ } else {
+ memcpy(ptr, buf, l);
+ }
invalidate_and_set_dirty(mr, addr1, l);
}
@@ -3148,7 +3152,11 @@ MemTxResult flatview_read_continue(FlatView *fv, hwaddr addr,
} else {
/* RAM case */
ptr = qemu_ram_ptr_length(mr->ram_block, addr1, &l, false);
- memcpy(buf, ptr, l);
+ if (attrs.debug && mr->ram_debug_ops) {
+ mr->ram_debug_ops->read(buf, ptr, l, attrs);
+ } else {
+ memcpy(buf, ptr, l);
+ }
}
if (release_lock) {
@@ -3222,7 +3230,8 @@ enum write_rom_type {
};
static inline void cpu_physical_memory_write_rom_internal(AddressSpace *as,
- hwaddr addr, const uint8_t *buf, int len, enum write_rom_type type)
+ hwaddr addr, const uint8_t *buf, int len, MemTxAttrs attrs,
+ enum write_rom_type type)
{
hwaddr l;
uint8_t *ptr;
@@ -3242,7 +3251,11 @@ static inline void cpu_physical_memory_write_rom_internal(AddressSpace *as,
ptr = qemu_map_ram_ptr(mr->ram_block, addr1);
switch (type) {
case WRITE_DATA:
- memcpy(ptr, buf, l);
+ if (mr->ram_debug_ops) {
+ mr->ram_debug_ops->write(ptr, buf, l, attrs);
+ } else {
+ memcpy(ptr, buf, l);
+ }
invalidate_and_set_dirty(mr, addr1, l);
break;
case FLUSH_CACHE:
@@ -3261,7 +3274,9 @@ static inline void cpu_physical_memory_write_rom_internal(AddressSpace *as,
void cpu_physical_memory_write_rom(AddressSpace *as, hwaddr addr,
const uint8_t *buf, int len)
{
- cpu_physical_memory_write_rom_internal(as, addr, buf, len, WRITE_DATA);
+ cpu_physical_memory_write_rom_internal(as, addr, buf, len,
+ MEMTXATTRS_UNSPECIFIED,
+ WRITE_DATA);
}
void cpu_flush_icache_range(hwaddr start, int len)
@@ -3276,8 +3291,9 @@ void cpu_flush_icache_range(hwaddr start, int len)
return;
}
- cpu_physical_memory_write_rom_internal(&address_space_memory,
- start, NULL, len, FLUSH_CACHE);
+ cpu_physical_memory_write_rom_internal(&address_space_memory, start, NULL,
+ len, MEMTXATTRS_UNSPECIFIED,
+ FLUSH_CACHE);
}
typedef struct {
@@ -3592,6 +3608,10 @@ int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr,
page = addr & TARGET_PAGE_MASK;
phys_addr = cpu_get_phys_page_attrs_debug(cpu, page, &attrs);
asidx = cpu_asidx_from_attrs(cpu, attrs);
+
+ /* set debug attrs to indicate memory access is from the debugger */
+ attrs.debug = 1;
+
/* if no physical page mapped, return an error */
if (phys_addr == -1)
return -1;
@@ -3600,13 +3620,14 @@ int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr,
l = len;
phys_addr += (addr & ~TARGET_PAGE_MASK);
if (is_write) {
- cpu_physical_memory_write_rom(cpu->cpu_ases[asidx].as,
- phys_addr, buf, l);
+ cpu_physical_memory_write_rom_internal(cpu->cpu_ases[asidx].as,
+ phys_addr, buf, l, attrs,
+ WRITE_DATA);
} else {
address_space_rw(cpu->cpu_ases[asidx].as, phys_addr,
- MEMTXATTRS_UNSPECIFIED,
- buf, l, 0);
+ attrs, buf, l, 0);
}
+
len -= l;
buf += l;
addr += l;
diff --git a/include/exec/memory.h b/include/exec/memory.h
index 783ef6457003..da96bee723bf 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -223,6 +223,18 @@ typedef struct IOMMUMemoryRegionClass {
typedef struct CoalescedMemoryRange CoalescedMemoryRange;
typedef struct MemoryRegionIoeventfd MemoryRegionIoeventfd;
+/* Memory Region RAM debug callback */
+typedef struct MemoryRegionRAMReadWriteOps MemoryRegionRAMReadWriteOps;
+
+struct MemoryRegionRAMReadWriteOps {
+ /* Write data into guest memory */
+ int (*write) (uint8_t *dest, const uint8_t *src,
+ uint32_t len, MemTxAttrs attrs);
+ /* Read data from guest memory */
+ int (*read) (uint8_t *dest, const uint8_t *src,
+ uint32_t len, MemTxAttrs attrs);
+};
+
struct MemoryRegion {
Object parent_obj;
@@ -262,6 +274,7 @@ struct MemoryRegion {
const char *name;
unsigned ioeventfd_nb;
MemoryRegionIoeventfd *ioeventfds;
+ const MemoryRegionRAMReadWriteOps *ram_debug_ops;
};
struct IOMMUMemoryRegion {
@@ -632,6 +645,21 @@ void memory_region_init_rom_device_nomigrate(MemoryRegion *mr,
uint64_t size,
Error **errp);
+/**
+ * memory_region_set_ram_debug_ops: Set debug access ops for a given memory
+ * region.
+ *
+ * @mr: the #MemoryRegion to be initialized
+ * @ops: a function that will be used for when accessing @target region during
+ * debug
+ */
+static inline void
+memory_region_set_ram_debug_ops(MemoryRegion *mr,
+ const MemoryRegionRAMReadWriteOps *ops)
+{
+ mr->ram_debug_ops = ops;
+}
+
/**
* memory_region_init_reservation: Initialize a memory region that reserves
* I/O space.
@@ -1944,7 +1972,7 @@ MemTxResult flatview_read(FlatView *fv, hwaddr addr, MemTxAttrs attrs,
void *ptr;
MemoryRegion *mr;
- if (__builtin_constant_p(len)) {
+ if (__builtin_constant_p(len) && !attrs.debug) {
if (len) {
rcu_read_lock();
l = len;
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 02/28] exec: add ram_debug_ops support
@ 2018-02-12 15:36 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh, Richard Henderson
Currently, the guest memory access for the debug purpose is performed
using the memcpy(). Lets extend the 'struct MemoryRegion' to include
ram_debug_ops callbacks. The ram_debug_ops can be used to override
memcpy() with something else.
The feature can be used by encrypted guest -- which can register
callbacks to override memcpy() with memory encryption/decryption APIs.
a typical usage:
mem_read(uint8_t *dst, uint8_t *src, uint32_t len, MemTxAttrs *attrs);
mem_write(uint8_t *dst, uint8_t *src, uint32_t len, MemTxAttrs *attrs);
MemoryRegionRAMReadWriteOps ops;
ops.read = mem_read;
ops.write = mem_write;
memory_region_init_ram(mem, NULL, "memory", size, NULL);
memory_region_set_ram_debug_ops(mem, ops);
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
exec.c | 43 ++++++++++++++++++++++++++++++++-----------
include/exec/memory.h | 30 +++++++++++++++++++++++++++++-
2 files changed, 61 insertions(+), 12 deletions(-)
diff --git a/exec.c b/exec.c
index e8d7b335b601..b1366f85b07b 100644
--- a/exec.c
+++ b/exec.c
@@ -3050,7 +3050,11 @@ static MemTxResult flatview_write_continue(FlatView *fv, hwaddr addr,
} else {
/* RAM case */
ptr = qemu_ram_ptr_length(mr->ram_block, addr1, &l, false);
- memcpy(ptr, buf, l);
+ if (attrs.debug && mr->ram_debug_ops) {
+ mr->ram_debug_ops->write(ptr, buf, l, attrs);
+ } else {
+ memcpy(ptr, buf, l);
+ }
invalidate_and_set_dirty(mr, addr1, l);
}
@@ -3148,7 +3152,11 @@ MemTxResult flatview_read_continue(FlatView *fv, hwaddr addr,
} else {
/* RAM case */
ptr = qemu_ram_ptr_length(mr->ram_block, addr1, &l, false);
- memcpy(buf, ptr, l);
+ if (attrs.debug && mr->ram_debug_ops) {
+ mr->ram_debug_ops->read(buf, ptr, l, attrs);
+ } else {
+ memcpy(buf, ptr, l);
+ }
}
if (release_lock) {
@@ -3222,7 +3230,8 @@ enum write_rom_type {
};
static inline void cpu_physical_memory_write_rom_internal(AddressSpace *as,
- hwaddr addr, const uint8_t *buf, int len, enum write_rom_type type)
+ hwaddr addr, const uint8_t *buf, int len, MemTxAttrs attrs,
+ enum write_rom_type type)
{
hwaddr l;
uint8_t *ptr;
@@ -3242,7 +3251,11 @@ static inline void cpu_physical_memory_write_rom_internal(AddressSpace *as,
ptr = qemu_map_ram_ptr(mr->ram_block, addr1);
switch (type) {
case WRITE_DATA:
- memcpy(ptr, buf, l);
+ if (mr->ram_debug_ops) {
+ mr->ram_debug_ops->write(ptr, buf, l, attrs);
+ } else {
+ memcpy(ptr, buf, l);
+ }
invalidate_and_set_dirty(mr, addr1, l);
break;
case FLUSH_CACHE:
@@ -3261,7 +3274,9 @@ static inline void cpu_physical_memory_write_rom_internal(AddressSpace *as,
void cpu_physical_memory_write_rom(AddressSpace *as, hwaddr addr,
const uint8_t *buf, int len)
{
- cpu_physical_memory_write_rom_internal(as, addr, buf, len, WRITE_DATA);
+ cpu_physical_memory_write_rom_internal(as, addr, buf, len,
+ MEMTXATTRS_UNSPECIFIED,
+ WRITE_DATA);
}
void cpu_flush_icache_range(hwaddr start, int len)
@@ -3276,8 +3291,9 @@ void cpu_flush_icache_range(hwaddr start, int len)
return;
}
- cpu_physical_memory_write_rom_internal(&address_space_memory,
- start, NULL, len, FLUSH_CACHE);
+ cpu_physical_memory_write_rom_internal(&address_space_memory, start, NULL,
+ len, MEMTXATTRS_UNSPECIFIED,
+ FLUSH_CACHE);
}
typedef struct {
@@ -3592,6 +3608,10 @@ int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr,
page = addr & TARGET_PAGE_MASK;
phys_addr = cpu_get_phys_page_attrs_debug(cpu, page, &attrs);
asidx = cpu_asidx_from_attrs(cpu, attrs);
+
+ /* set debug attrs to indicate memory access is from the debugger */
+ attrs.debug = 1;
+
/* if no physical page mapped, return an error */
if (phys_addr == -1)
return -1;
@@ -3600,13 +3620,14 @@ int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr,
l = len;
phys_addr += (addr & ~TARGET_PAGE_MASK);
if (is_write) {
- cpu_physical_memory_write_rom(cpu->cpu_ases[asidx].as,
- phys_addr, buf, l);
+ cpu_physical_memory_write_rom_internal(cpu->cpu_ases[asidx].as,
+ phys_addr, buf, l, attrs,
+ WRITE_DATA);
} else {
address_space_rw(cpu->cpu_ases[asidx].as, phys_addr,
- MEMTXATTRS_UNSPECIFIED,
- buf, l, 0);
+ attrs, buf, l, 0);
}
+
len -= l;
buf += l;
addr += l;
diff --git a/include/exec/memory.h b/include/exec/memory.h
index 783ef6457003..da96bee723bf 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -223,6 +223,18 @@ typedef struct IOMMUMemoryRegionClass {
typedef struct CoalescedMemoryRange CoalescedMemoryRange;
typedef struct MemoryRegionIoeventfd MemoryRegionIoeventfd;
+/* Memory Region RAM debug callback */
+typedef struct MemoryRegionRAMReadWriteOps MemoryRegionRAMReadWriteOps;
+
+struct MemoryRegionRAMReadWriteOps {
+ /* Write data into guest memory */
+ int (*write) (uint8_t *dest, const uint8_t *src,
+ uint32_t len, MemTxAttrs attrs);
+ /* Read data from guest memory */
+ int (*read) (uint8_t *dest, const uint8_t *src,
+ uint32_t len, MemTxAttrs attrs);
+};
+
struct MemoryRegion {
Object parent_obj;
@@ -262,6 +274,7 @@ struct MemoryRegion {
const char *name;
unsigned ioeventfd_nb;
MemoryRegionIoeventfd *ioeventfds;
+ const MemoryRegionRAMReadWriteOps *ram_debug_ops;
};
struct IOMMUMemoryRegion {
@@ -632,6 +645,21 @@ void memory_region_init_rom_device_nomigrate(MemoryRegion *mr,
uint64_t size,
Error **errp);
+/**
+ * memory_region_set_ram_debug_ops: Set debug access ops for a given memory
+ * region.
+ *
+ * @mr: the #MemoryRegion to be initialized
+ * @ops: a function that will be used for when accessing @target region during
+ * debug
+ */
+static inline void
+memory_region_set_ram_debug_ops(MemoryRegion *mr,
+ const MemoryRegionRAMReadWriteOps *ops)
+{
+ mr->ram_debug_ops = ops;
+}
+
/**
* memory_region_init_reservation: Initialize a memory region that reserves
* I/O space.
@@ -1944,7 +1972,7 @@ MemTxResult flatview_read(FlatView *fv, hwaddr addr, MemTxAttrs attrs,
void *ptr;
MemoryRegion *mr;
- if (__builtin_constant_p(len)) {
+ if (__builtin_constant_p(len) && !attrs.debug) {
if (len) {
rcu_read_lock();
l = len;
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread
* [PATCH v8 03/28] exec: add debug version of physical memory read and write API
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:36 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
Adds the following new APIs
- cpu_physical_memory_read_debug
- cpu_physical_memory_write_debug
- cpu_physical_memory_rw_debug
- ldl_phys_debug
- ldq_phys_debug
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
---
exec.c | 40 ++++++++++++++++++++++++++++++++++++++++
include/exec/cpu-common.h | 15 +++++++++++++++
2 files changed, 55 insertions(+)
diff --git a/exec.c b/exec.c
index b1366f85b07b..bc7a63fbc2f4 100644
--- a/exec.c
+++ b/exec.c
@@ -3592,6 +3592,46 @@ void address_space_cache_destroy(MemoryRegionCache *cache)
#define RCU_READ_UNLOCK() rcu_read_unlock()
#include "memory_ldst.inc.c"
+uint32_t ldl_phys_debug(CPUState *cpu, hwaddr addr)
+{
+ MemTxAttrs attrs;
+ int asidx = cpu_asidx_from_attrs(cpu, attrs);
+ uint32_t val;
+
+ /* set debug attrs to indicate memory access is from the debugger */
+ attrs.debug = 1;
+
+ address_space_rw(cpu->cpu_ases[asidx].as, addr, attrs,
+ (void *) &val, 4, 0);
+
+ return tswap32(val);
+}
+
+uint64_t ldq_phys_debug(CPUState *cpu, hwaddr addr)
+{
+ MemTxAttrs attrs;
+ int asidx = cpu_asidx_from_attrs(cpu, attrs);
+ uint64_t val;
+
+ /* set debug attrs to indicate memory access is from the debugger */
+ attrs.debug = 1;
+
+ address_space_rw(cpu->cpu_ases[asidx].as, addr, attrs,
+ (void *) &val, 8, 0);
+ return val;
+}
+
+void cpu_physical_memory_rw_debug(hwaddr addr, uint8_t *buf,
+ int len, int is_write)
+{
+ MemTxAttrs attrs;
+
+ /* set debug attrs to indicate memory access is from the debugger */
+ attrs.debug = 1;
+
+ address_space_rw(&address_space_memory, addr, attrs, buf, len, is_write);
+}
+
/* virtual memory access for debug (includes writing to ROM) */
int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr,
uint8_t *buf, int len, int is_write)
diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h
index 74341b19d26a..fa01385d4f1b 100644
--- a/include/exec/cpu-common.h
+++ b/include/exec/cpu-common.h
@@ -77,11 +77,26 @@ size_t qemu_ram_pagesize_largest(void);
void cpu_physical_memory_rw(hwaddr addr, uint8_t *buf,
int len, int is_write);
+void cpu_physical_memory_rw_debug(hwaddr addr, uint8_t *buf,
+ int len, int is_write);
static inline void cpu_physical_memory_read(hwaddr addr,
void *buf, int len)
{
cpu_physical_memory_rw(addr, buf, len, 0);
}
+static inline void cpu_physical_memory_read_debug(hwaddr addr,
+ void *buf, int len)
+{
+ cpu_physical_memory_rw_debug(addr, buf, len, 0);
+}
+static inline void cpu_physical_memory_write_debug(hwaddr addr,
+ const void *buf, int len)
+{
+ cpu_physical_memory_rw_debug(addr, (void *)buf, len, 1);
+}
+uint32_t ldl_phys_debug(CPUState *cpu, hwaddr addr);
+uint64_t ldq_phys_debug(CPUState *cpu, hwaddr addr);
+
static inline void cpu_physical_memory_write(hwaddr addr,
const void *buf, int len)
{
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 03/28] exec: add debug version of physical memory read and write API
@ 2018-02-12 15:36 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh, Richard Henderson
Adds the following new APIs
- cpu_physical_memory_read_debug
- cpu_physical_memory_write_debug
- cpu_physical_memory_rw_debug
- ldl_phys_debug
- ldq_phys_debug
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
---
exec.c | 40 ++++++++++++++++++++++++++++++++++++++++
include/exec/cpu-common.h | 15 +++++++++++++++
2 files changed, 55 insertions(+)
diff --git a/exec.c b/exec.c
index b1366f85b07b..bc7a63fbc2f4 100644
--- a/exec.c
+++ b/exec.c
@@ -3592,6 +3592,46 @@ void address_space_cache_destroy(MemoryRegionCache *cache)
#define RCU_READ_UNLOCK() rcu_read_unlock()
#include "memory_ldst.inc.c"
+uint32_t ldl_phys_debug(CPUState *cpu, hwaddr addr)
+{
+ MemTxAttrs attrs;
+ int asidx = cpu_asidx_from_attrs(cpu, attrs);
+ uint32_t val;
+
+ /* set debug attrs to indicate memory access is from the debugger */
+ attrs.debug = 1;
+
+ address_space_rw(cpu->cpu_ases[asidx].as, addr, attrs,
+ (void *) &val, 4, 0);
+
+ return tswap32(val);
+}
+
+uint64_t ldq_phys_debug(CPUState *cpu, hwaddr addr)
+{
+ MemTxAttrs attrs;
+ int asidx = cpu_asidx_from_attrs(cpu, attrs);
+ uint64_t val;
+
+ /* set debug attrs to indicate memory access is from the debugger */
+ attrs.debug = 1;
+
+ address_space_rw(cpu->cpu_ases[asidx].as, addr, attrs,
+ (void *) &val, 8, 0);
+ return val;
+}
+
+void cpu_physical_memory_rw_debug(hwaddr addr, uint8_t *buf,
+ int len, int is_write)
+{
+ MemTxAttrs attrs;
+
+ /* set debug attrs to indicate memory access is from the debugger */
+ attrs.debug = 1;
+
+ address_space_rw(&address_space_memory, addr, attrs, buf, len, is_write);
+}
+
/* virtual memory access for debug (includes writing to ROM) */
int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr,
uint8_t *buf, int len, int is_write)
diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h
index 74341b19d26a..fa01385d4f1b 100644
--- a/include/exec/cpu-common.h
+++ b/include/exec/cpu-common.h
@@ -77,11 +77,26 @@ size_t qemu_ram_pagesize_largest(void);
void cpu_physical_memory_rw(hwaddr addr, uint8_t *buf,
int len, int is_write);
+void cpu_physical_memory_rw_debug(hwaddr addr, uint8_t *buf,
+ int len, int is_write);
static inline void cpu_physical_memory_read(hwaddr addr,
void *buf, int len)
{
cpu_physical_memory_rw(addr, buf, len, 0);
}
+static inline void cpu_physical_memory_read_debug(hwaddr addr,
+ void *buf, int len)
+{
+ cpu_physical_memory_rw_debug(addr, buf, len, 0);
+}
+static inline void cpu_physical_memory_write_debug(hwaddr addr,
+ const void *buf, int len)
+{
+ cpu_physical_memory_rw_debug(addr, (void *)buf, len, 1);
+}
+uint32_t ldl_phys_debug(CPUState *cpu, hwaddr addr);
+uint64_t ldq_phys_debug(CPUState *cpu, hwaddr addr);
+
static inline void cpu_physical_memory_write(hwaddr addr,
const void *buf, int len)
{
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread
* [PATCH v8 04/28] monitor/i386: use debug APIs when accessing guest memory
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:36 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
Updates HMP commands to use the debug version of APIs when accessing the
guest memory.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
cpus.c | 2 +-
disas.c | 2 +-
monitor.c | 6 +++---
target/i386/helper.c | 14 ++++++------
target/i386/monitor.c | 60 +++++++++++++++++++++++++++------------------------
5 files changed, 44 insertions(+), 40 deletions(-)
diff --git a/cpus.c b/cpus.c
index f298b659f467..fdd40d9e8ead 100644
--- a/cpus.c
+++ b/cpus.c
@@ -2214,7 +2214,7 @@ void qmp_pmemsave(int64_t addr, int64_t size, const char *filename,
l = sizeof(buf);
if (l > size)
l = size;
- cpu_physical_memory_read(addr, buf, l);
+ cpu_physical_memory_read_debug(addr, buf, l);
if (fwrite(buf, 1, l, f) != l) {
error_setg(errp, QERR_IO_ERROR);
goto exit;
diff --git a/disas.c b/disas.c
index d4ad1089efb3..fcedbf263302 100644
--- a/disas.c
+++ b/disas.c
@@ -586,7 +586,7 @@ static int
physical_read_memory(bfd_vma memaddr, bfd_byte *myaddr, int length,
struct disassemble_info *info)
{
- cpu_physical_memory_read(memaddr, myaddr, length);
+ cpu_physical_memory_read_debug(memaddr, myaddr, length);
return 0;
}
diff --git a/monitor.c b/monitor.c
index f4992505b14f..48a9f278d1ec 100644
--- a/monitor.c
+++ b/monitor.c
@@ -1361,7 +1361,7 @@ static void memory_dump(Monitor *mon, int count, int format, int wsize,
if (l > line_size)
l = line_size;
if (is_physical) {
- cpu_physical_memory_read(addr, buf, l);
+ cpu_physical_memory_read_debug(addr, buf, l);
} else {
if (cpu_memory_rw_debug(cs, addr, buf, l, 0) < 0) {
monitor_printf(mon, " Cannot access memory\n");
@@ -1567,8 +1567,8 @@ static void hmp_sum(Monitor *mon, const QDict *qdict)
sum = 0;
for(addr = start; addr < (start + size); addr++) {
- uint8_t val = address_space_ldub(&address_space_memory, addr,
- MEMTXATTRS_UNSPECIFIED, NULL);
+ uint8_t val;
+ cpu_physical_memory_read_debug(addr, &val, 1);
/* BSD sum algorithm ('sum' Unix command) */
sum = (sum >> 1) | (sum << 15);
sum += val;
diff --git a/target/i386/helper.c b/target/i386/helper.c
index 9fba146b7fb0..58fb6eec562a 100644
--- a/target/i386/helper.c
+++ b/target/i386/helper.c
@@ -757,7 +757,7 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
if (la57) {
pml5e_addr = ((env->cr[3] & ~0xfff) +
(((addr >> 48) & 0x1ff) << 3)) & a20_mask;
- pml5e = x86_ldq_phys(cs, pml5e_addr);
+ pml5e = ldq_phys_debug(cs, pml5e_addr);
if (!(pml5e & PG_PRESENT_MASK)) {
return -1;
}
@@ -767,7 +767,7 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
pml4e_addr = ((pml5e & PG_ADDRESS_MASK) +
(((addr >> 39) & 0x1ff) << 3)) & a20_mask;
- pml4e = x86_ldq_phys(cs, pml4e_addr);
+ pml4e = ldq_phys_debug(cs, pml4e_addr);
if (!(pml4e & PG_PRESENT_MASK)) {
return -1;
}
@@ -788,14 +788,14 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
{
pdpe_addr = ((env->cr[3] & ~0x1f) + ((addr >> 27) & 0x18)) &
a20_mask;
- pdpe = x86_ldq_phys(cs, pdpe_addr);
+ pdpe = ldq_phys_debug(cs, pdpe_addr);
if (!(pdpe & PG_PRESENT_MASK))
return -1;
}
pde_addr = ((pdpe & PG_ADDRESS_MASK) +
(((addr >> 21) & 0x1ff) << 3)) & a20_mask;
- pde = x86_ldq_phys(cs, pde_addr);
+ pde = ldq_phys_debug(cs, pde_addr);
if (!(pde & PG_PRESENT_MASK)) {
return -1;
}
@@ -808,7 +808,7 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
pte_addr = ((pde & PG_ADDRESS_MASK) +
(((addr >> 12) & 0x1ff) << 3)) & a20_mask;
page_size = 4096;
- pte = x86_ldq_phys(cs, pte_addr);
+ pte = ldq_phys_debug(cs, pte_addr);
}
if (!(pte & PG_PRESENT_MASK)) {
return -1;
@@ -818,7 +818,7 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
/* page directory entry */
pde_addr = ((env->cr[3] & ~0xfff) + ((addr >> 20) & 0xffc)) & a20_mask;
- pde = x86_ldl_phys(cs, pde_addr);
+ pde = ldl_phys_debug(cs, pde_addr);
if (!(pde & PG_PRESENT_MASK))
return -1;
if ((pde & PG_PSE_MASK) && (env->cr[4] & CR4_PSE_MASK)) {
@@ -827,7 +827,7 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
} else {
/* page directory entry */
pte_addr = ((pde & ~0xfff) + ((addr >> 10) & 0xffc)) & a20_mask;
- pte = x86_ldl_phys(cs, pte_addr);
+ pte = ldl_phys_debug(cs, pte_addr);
if (!(pte & PG_PRESENT_MASK)) {
return -1;
}
diff --git a/target/i386/monitor.c b/target/i386/monitor.c
index 75429129fde0..55ea10deb8ef 100644
--- a/target/i386/monitor.c
+++ b/target/i386/monitor.c
@@ -68,7 +68,7 @@ static void tlb_info_32(Monitor *mon, CPUArchState *env)
pgd = env->cr[3] & ~0xfff;
for(l1 = 0; l1 < 1024; l1++) {
- cpu_physical_memory_read(pgd + l1 * 4, &pde, 4);
+ cpu_physical_memory_read_debug(pgd + l1 * 4, &pde, 4);
pde = le32_to_cpu(pde);
if (pde & PG_PRESENT_MASK) {
if ((pde & PG_PSE_MASK) && (env->cr[4] & CR4_PSE_MASK)) {
@@ -76,7 +76,8 @@ static void tlb_info_32(Monitor *mon, CPUArchState *env)
print_pte(mon, env, (l1 << 22), pde, ~((1 << 21) - 1));
} else {
for(l2 = 0; l2 < 1024; l2++) {
- cpu_physical_memory_read((pde & ~0xfff) + l2 * 4, &pte, 4);
+ cpu_physical_memory_read_debug((pde & ~0xfff) + l2 * 4,
+ &pte, 4);
pte = le32_to_cpu(pte);
if (pte & PG_PRESENT_MASK) {
print_pte(mon, env, (l1 << 22) + (l2 << 12),
@@ -97,12 +98,12 @@ static void tlb_info_pae32(Monitor *mon, CPUArchState *env)
pdp_addr = env->cr[3] & ~0x1f;
for (l1 = 0; l1 < 4; l1++) {
- cpu_physical_memory_read(pdp_addr + l1 * 8, &pdpe, 8);
+ cpu_physical_memory_read_debug(pdp_addr + l1 * 8, &pdpe, 8);
pdpe = le64_to_cpu(pdpe);
if (pdpe & PG_PRESENT_MASK) {
pd_addr = pdpe & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
- cpu_physical_memory_read(pd_addr + l2 * 8, &pde, 8);
+ cpu_physical_memory_read_debug(pd_addr + l2 * 8, &pde, 8);
pde = le64_to_cpu(pde);
if (pde & PG_PRESENT_MASK) {
if (pde & PG_PSE_MASK) {
@@ -112,7 +113,8 @@ static void tlb_info_pae32(Monitor *mon, CPUArchState *env)
} else {
pt_addr = pde & 0x3fffffffff000ULL;
for (l3 = 0; l3 < 512; l3++) {
- cpu_physical_memory_read(pt_addr + l3 * 8, &pte, 8);
+ cpu_physical_memory_read_debug(pt_addr + l3 * 8,
+ &pte, 8);
pte = le64_to_cpu(pte);
if (pte & PG_PRESENT_MASK) {
print_pte(mon, env, (l1 << 30) + (l2 << 21)
@@ -137,7 +139,7 @@ static void tlb_info_la48(Monitor *mon, CPUArchState *env,
uint64_t pdp_addr, pd_addr, pt_addr;
for (l1 = 0; l1 < 512; l1++) {
- cpu_physical_memory_read(pml4_addr + l1 * 8, &pml4e, 8);
+ cpu_physical_memory_read_debug(pml4_addr + l1 * 8, &pml4e, 8);
pml4e = le64_to_cpu(pml4e);
if (!(pml4e & PG_PRESENT_MASK)) {
continue;
@@ -145,7 +147,7 @@ static void tlb_info_la48(Monitor *mon, CPUArchState *env,
pdp_addr = pml4e & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
- cpu_physical_memory_read(pdp_addr + l2 * 8, &pdpe, 8);
+ cpu_physical_memory_read_debug(pdp_addr + l2 * 8, &pdpe, 8);
pdpe = le64_to_cpu(pdpe);
if (!(pdpe & PG_PRESENT_MASK)) {
continue;
@@ -160,7 +162,7 @@ static void tlb_info_la48(Monitor *mon, CPUArchState *env,
pd_addr = pdpe & 0x3fffffffff000ULL;
for (l3 = 0; l3 < 512; l3++) {
- cpu_physical_memory_read(pd_addr + l3 * 8, &pde, 8);
+ cpu_physical_memory_read_debug(pd_addr + l3 * 8, &pde, 8);
pde = le64_to_cpu(pde);
if (!(pde & PG_PRESENT_MASK)) {
continue;
@@ -175,9 +177,7 @@ static void tlb_info_la48(Monitor *mon, CPUArchState *env,
pt_addr = pde & 0x3fffffffff000ULL;
for (l4 = 0; l4 < 512; l4++) {
- cpu_physical_memory_read(pt_addr
- + l4 * 8,
- &pte, 8);
+ cpu_physical_memory_read_debug(pt_addr + l4 * 8, &pte, 8);
pte = le64_to_cpu(pte);
if (pte & PG_PRESENT_MASK) {
print_pte(mon, env, (l0 << 48) + (l1 << 39) +
@@ -198,7 +198,7 @@ static void tlb_info_la57(Monitor *mon, CPUArchState *env)
pml5_addr = env->cr[3] & 0x3fffffffff000ULL;
for (l0 = 0; l0 < 512; l0++) {
- cpu_physical_memory_read(pml5_addr + l0 * 8, &pml5e, 8);
+ cpu_physical_memory_read_debug(pml5_addr + l0 * 8, &pml5e, 8);
pml5e = le64_to_cpu(pml5e);
if (pml5e & PG_PRESENT_MASK) {
tlb_info_la48(mon, env, l0, pml5e & 0x3fffffffff000ULL);
@@ -273,7 +273,7 @@ static void mem_info_32(Monitor *mon, CPUArchState *env)
last_prot = 0;
start = -1;
for(l1 = 0; l1 < 1024; l1++) {
- cpu_physical_memory_read(pgd + l1 * 4, &pde, 4);
+ cpu_physical_memory_read_debug(pgd + l1 * 4, &pde, 4);
pde = le32_to_cpu(pde);
end = l1 << 22;
if (pde & PG_PRESENT_MASK) {
@@ -282,7 +282,8 @@ static void mem_info_32(Monitor *mon, CPUArchState *env)
mem_print(mon, &start, &last_prot, end, prot);
} else {
for(l2 = 0; l2 < 1024; l2++) {
- cpu_physical_memory_read((pde & ~0xfff) + l2 * 4, &pte, 4);
+ cpu_physical_memory_read_debug((pde & ~0xfff) + l2 * 4,
+ &pte, 4);
pte = le32_to_cpu(pte);
end = (l1 << 22) + (l2 << 12);
if (pte & PG_PRESENT_MASK) {
@@ -315,13 +316,13 @@ static void mem_info_pae32(Monitor *mon, CPUArchState *env)
last_prot = 0;
start = -1;
for (l1 = 0; l1 < 4; l1++) {
- cpu_physical_memory_read(pdp_addr + l1 * 8, &pdpe, 8);
+ cpu_physical_memory_read_debug(pdp_addr + l1 * 8, &pdpe, 8);
pdpe = le64_to_cpu(pdpe);
end = l1 << 30;
if (pdpe & PG_PRESENT_MASK) {
pd_addr = pdpe & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
- cpu_physical_memory_read(pd_addr + l2 * 8, &pde, 8);
+ cpu_physical_memory_read_debug(pd_addr + l2 * 8, &pde, 8);
pde = le64_to_cpu(pde);
end = (l1 << 30) + (l2 << 21);
if (pde & PG_PRESENT_MASK) {
@@ -332,7 +333,8 @@ static void mem_info_pae32(Monitor *mon, CPUArchState *env)
} else {
pt_addr = pde & 0x3fffffffff000ULL;
for (l3 = 0; l3 < 512; l3++) {
- cpu_physical_memory_read(pt_addr + l3 * 8, &pte, 8);
+ cpu_physical_memory_read_debug(pt_addr + l3 * 8,
+ &pte, 8);
pte = le64_to_cpu(pte);
end = (l1 << 30) + (l2 << 21) + (l3 << 12);
if (pte & PG_PRESENT_MASK) {
@@ -371,13 +373,13 @@ static void mem_info_la48(Monitor *mon, CPUArchState *env)
last_prot = 0;
start = -1;
for (l1 = 0; l1 < 512; l1++) {
- cpu_physical_memory_read(pml4_addr + l1 * 8, &pml4e, 8);
+ cpu_physical_memory_read_debug(pml4_addr + l1 * 8, &pml4e, 8);
pml4e = le64_to_cpu(pml4e);
end = l1 << 39;
if (pml4e & PG_PRESENT_MASK) {
pdp_addr = pml4e & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
- cpu_physical_memory_read(pdp_addr + l2 * 8, &pdpe, 8);
+ cpu_physical_memory_read_debug(pdp_addr + l2 * 8, &pdpe, 8);
pdpe = le64_to_cpu(pdpe);
end = (l1 << 39) + (l2 << 30);
if (pdpe & PG_PRESENT_MASK) {
@@ -389,7 +391,8 @@ static void mem_info_la48(Monitor *mon, CPUArchState *env)
} else {
pd_addr = pdpe & 0x3fffffffff000ULL;
for (l3 = 0; l3 < 512; l3++) {
- cpu_physical_memory_read(pd_addr + l3 * 8, &pde, 8);
+ cpu_physical_memory_read_debug(pd_addr + l3 * 8,
+ &pde, 8);
pde = le64_to_cpu(pde);
end = (l1 << 39) + (l2 << 30) + (l3 << 21);
if (pde & PG_PRESENT_MASK) {
@@ -401,9 +404,9 @@ static void mem_info_la48(Monitor *mon, CPUArchState *env)
} else {
pt_addr = pde & 0x3fffffffff000ULL;
for (l4 = 0; l4 < 512; l4++) {
- cpu_physical_memory_read(pt_addr
- + l4 * 8,
- &pte, 8);
+ cpu_physical_memory_read_debug(pt_addr
+ + l4 * 8,
+ &pte, 8);
pte = le64_to_cpu(pte);
end = (l1 << 39) + (l2 << 30) +
(l3 << 21) + (l4 << 12);
@@ -448,7 +451,7 @@ static void mem_info_la57(Monitor *mon, CPUArchState *env)
last_prot = 0;
start = -1;
for (l0 = 0; l0 < 512; l0++) {
- cpu_physical_memory_read(pml5_addr + l0 * 8, &pml5e, 8);
+ cpu_physical_memory_read_debug(pml5_addr + l0 * 8, &pml5e, 8);
pml5e = le64_to_cpu(pml5e);
end = l0 << 48;
if (!(pml5e & PG_PRESENT_MASK)) {
@@ -459,7 +462,7 @@ static void mem_info_la57(Monitor *mon, CPUArchState *env)
pml4_addr = pml5e & 0x3fffffffff000ULL;
for (l1 = 0; l1 < 512; l1++) {
- cpu_physical_memory_read(pml4_addr + l1 * 8, &pml4e, 8);
+ cpu_physical_memory_read_debug(pml4_addr + l1 * 8, &pml4e, 8);
pml4e = le64_to_cpu(pml4e);
end = (l0 << 48) + (l1 << 39);
if (!(pml4e & PG_PRESENT_MASK)) {
@@ -470,7 +473,7 @@ static void mem_info_la57(Monitor *mon, CPUArchState *env)
pdp_addr = pml4e & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
- cpu_physical_memory_read(pdp_addr + l2 * 8, &pdpe, 8);
+ cpu_physical_memory_read_debug(pdp_addr + l2 * 8, &pdpe, 8);
pdpe = le64_to_cpu(pdpe);
end = (l0 << 48) + (l1 << 39) + (l2 << 30);
if (pdpe & PG_PRESENT_MASK) {
@@ -489,7 +492,7 @@ static void mem_info_la57(Monitor *mon, CPUArchState *env)
pd_addr = pdpe & 0x3fffffffff000ULL;
for (l3 = 0; l3 < 512; l3++) {
- cpu_physical_memory_read(pd_addr + l3 * 8, &pde, 8);
+ cpu_physical_memory_read_debug(pd_addr + l3 * 8, &pde, 8);
pde = le64_to_cpu(pde);
end = (l0 << 48) + (l1 << 39) + (l2 << 30) + (l3 << 21);
if (pde & PG_PRESENT_MASK) {
@@ -508,7 +511,8 @@ static void mem_info_la57(Monitor *mon, CPUArchState *env)
pt_addr = pde & 0x3fffffffff000ULL;
for (l4 = 0; l4 < 512; l4++) {
- cpu_physical_memory_read(pt_addr + l4 * 8, &pte, 8);
+ cpu_physical_memory_read_debug(pt_addr + l4 * 8,
+ &pte, 8);
pte = le64_to_cpu(pte);
end = (l0 << 48) + (l1 << 39) + (l2 << 30) +
(l3 << 21) + (l4 << 12);
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 04/28] monitor/i386: use debug APIs when accessing guest memory
@ 2018-02-12 15:36 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh, Richard Henderson
Updates HMP commands to use the debug version of APIs when accessing the
guest memory.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
cpus.c | 2 +-
disas.c | 2 +-
monitor.c | 6 +++---
target/i386/helper.c | 14 ++++++------
target/i386/monitor.c | 60 +++++++++++++++++++++++++++------------------------
5 files changed, 44 insertions(+), 40 deletions(-)
diff --git a/cpus.c b/cpus.c
index f298b659f467..fdd40d9e8ead 100644
--- a/cpus.c
+++ b/cpus.c
@@ -2214,7 +2214,7 @@ void qmp_pmemsave(int64_t addr, int64_t size, const char *filename,
l = sizeof(buf);
if (l > size)
l = size;
- cpu_physical_memory_read(addr, buf, l);
+ cpu_physical_memory_read_debug(addr, buf, l);
if (fwrite(buf, 1, l, f) != l) {
error_setg(errp, QERR_IO_ERROR);
goto exit;
diff --git a/disas.c b/disas.c
index d4ad1089efb3..fcedbf263302 100644
--- a/disas.c
+++ b/disas.c
@@ -586,7 +586,7 @@ static int
physical_read_memory(bfd_vma memaddr, bfd_byte *myaddr, int length,
struct disassemble_info *info)
{
- cpu_physical_memory_read(memaddr, myaddr, length);
+ cpu_physical_memory_read_debug(memaddr, myaddr, length);
return 0;
}
diff --git a/monitor.c b/monitor.c
index f4992505b14f..48a9f278d1ec 100644
--- a/monitor.c
+++ b/monitor.c
@@ -1361,7 +1361,7 @@ static void memory_dump(Monitor *mon, int count, int format, int wsize,
if (l > line_size)
l = line_size;
if (is_physical) {
- cpu_physical_memory_read(addr, buf, l);
+ cpu_physical_memory_read_debug(addr, buf, l);
} else {
if (cpu_memory_rw_debug(cs, addr, buf, l, 0) < 0) {
monitor_printf(mon, " Cannot access memory\n");
@@ -1567,8 +1567,8 @@ static void hmp_sum(Monitor *mon, const QDict *qdict)
sum = 0;
for(addr = start; addr < (start + size); addr++) {
- uint8_t val = address_space_ldub(&address_space_memory, addr,
- MEMTXATTRS_UNSPECIFIED, NULL);
+ uint8_t val;
+ cpu_physical_memory_read_debug(addr, &val, 1);
/* BSD sum algorithm ('sum' Unix command) */
sum = (sum >> 1) | (sum << 15);
sum += val;
diff --git a/target/i386/helper.c b/target/i386/helper.c
index 9fba146b7fb0..58fb6eec562a 100644
--- a/target/i386/helper.c
+++ b/target/i386/helper.c
@@ -757,7 +757,7 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
if (la57) {
pml5e_addr = ((env->cr[3] & ~0xfff) +
(((addr >> 48) & 0x1ff) << 3)) & a20_mask;
- pml5e = x86_ldq_phys(cs, pml5e_addr);
+ pml5e = ldq_phys_debug(cs, pml5e_addr);
if (!(pml5e & PG_PRESENT_MASK)) {
return -1;
}
@@ -767,7 +767,7 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
pml4e_addr = ((pml5e & PG_ADDRESS_MASK) +
(((addr >> 39) & 0x1ff) << 3)) & a20_mask;
- pml4e = x86_ldq_phys(cs, pml4e_addr);
+ pml4e = ldq_phys_debug(cs, pml4e_addr);
if (!(pml4e & PG_PRESENT_MASK)) {
return -1;
}
@@ -788,14 +788,14 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
{
pdpe_addr = ((env->cr[3] & ~0x1f) + ((addr >> 27) & 0x18)) &
a20_mask;
- pdpe = x86_ldq_phys(cs, pdpe_addr);
+ pdpe = ldq_phys_debug(cs, pdpe_addr);
if (!(pdpe & PG_PRESENT_MASK))
return -1;
}
pde_addr = ((pdpe & PG_ADDRESS_MASK) +
(((addr >> 21) & 0x1ff) << 3)) & a20_mask;
- pde = x86_ldq_phys(cs, pde_addr);
+ pde = ldq_phys_debug(cs, pde_addr);
if (!(pde & PG_PRESENT_MASK)) {
return -1;
}
@@ -808,7 +808,7 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
pte_addr = ((pde & PG_ADDRESS_MASK) +
(((addr >> 12) & 0x1ff) << 3)) & a20_mask;
page_size = 4096;
- pte = x86_ldq_phys(cs, pte_addr);
+ pte = ldq_phys_debug(cs, pte_addr);
}
if (!(pte & PG_PRESENT_MASK)) {
return -1;
@@ -818,7 +818,7 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
/* page directory entry */
pde_addr = ((env->cr[3] & ~0xfff) + ((addr >> 20) & 0xffc)) & a20_mask;
- pde = x86_ldl_phys(cs, pde_addr);
+ pde = ldl_phys_debug(cs, pde_addr);
if (!(pde & PG_PRESENT_MASK))
return -1;
if ((pde & PG_PSE_MASK) && (env->cr[4] & CR4_PSE_MASK)) {
@@ -827,7 +827,7 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
} else {
/* page directory entry */
pte_addr = ((pde & ~0xfff) + ((addr >> 10) & 0xffc)) & a20_mask;
- pte = x86_ldl_phys(cs, pte_addr);
+ pte = ldl_phys_debug(cs, pte_addr);
if (!(pte & PG_PRESENT_MASK)) {
return -1;
}
diff --git a/target/i386/monitor.c b/target/i386/monitor.c
index 75429129fde0..55ea10deb8ef 100644
--- a/target/i386/monitor.c
+++ b/target/i386/monitor.c
@@ -68,7 +68,7 @@ static void tlb_info_32(Monitor *mon, CPUArchState *env)
pgd = env->cr[3] & ~0xfff;
for(l1 = 0; l1 < 1024; l1++) {
- cpu_physical_memory_read(pgd + l1 * 4, &pde, 4);
+ cpu_physical_memory_read_debug(pgd + l1 * 4, &pde, 4);
pde = le32_to_cpu(pde);
if (pde & PG_PRESENT_MASK) {
if ((pde & PG_PSE_MASK) && (env->cr[4] & CR4_PSE_MASK)) {
@@ -76,7 +76,8 @@ static void tlb_info_32(Monitor *mon, CPUArchState *env)
print_pte(mon, env, (l1 << 22), pde, ~((1 << 21) - 1));
} else {
for(l2 = 0; l2 < 1024; l2++) {
- cpu_physical_memory_read((pde & ~0xfff) + l2 * 4, &pte, 4);
+ cpu_physical_memory_read_debug((pde & ~0xfff) + l2 * 4,
+ &pte, 4);
pte = le32_to_cpu(pte);
if (pte & PG_PRESENT_MASK) {
print_pte(mon, env, (l1 << 22) + (l2 << 12),
@@ -97,12 +98,12 @@ static void tlb_info_pae32(Monitor *mon, CPUArchState *env)
pdp_addr = env->cr[3] & ~0x1f;
for (l1 = 0; l1 < 4; l1++) {
- cpu_physical_memory_read(pdp_addr + l1 * 8, &pdpe, 8);
+ cpu_physical_memory_read_debug(pdp_addr + l1 * 8, &pdpe, 8);
pdpe = le64_to_cpu(pdpe);
if (pdpe & PG_PRESENT_MASK) {
pd_addr = pdpe & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
- cpu_physical_memory_read(pd_addr + l2 * 8, &pde, 8);
+ cpu_physical_memory_read_debug(pd_addr + l2 * 8, &pde, 8);
pde = le64_to_cpu(pde);
if (pde & PG_PRESENT_MASK) {
if (pde & PG_PSE_MASK) {
@@ -112,7 +113,8 @@ static void tlb_info_pae32(Monitor *mon, CPUArchState *env)
} else {
pt_addr = pde & 0x3fffffffff000ULL;
for (l3 = 0; l3 < 512; l3++) {
- cpu_physical_memory_read(pt_addr + l3 * 8, &pte, 8);
+ cpu_physical_memory_read_debug(pt_addr + l3 * 8,
+ &pte, 8);
pte = le64_to_cpu(pte);
if (pte & PG_PRESENT_MASK) {
print_pte(mon, env, (l1 << 30) + (l2 << 21)
@@ -137,7 +139,7 @@ static void tlb_info_la48(Monitor *mon, CPUArchState *env,
uint64_t pdp_addr, pd_addr, pt_addr;
for (l1 = 0; l1 < 512; l1++) {
- cpu_physical_memory_read(pml4_addr + l1 * 8, &pml4e, 8);
+ cpu_physical_memory_read_debug(pml4_addr + l1 * 8, &pml4e, 8);
pml4e = le64_to_cpu(pml4e);
if (!(pml4e & PG_PRESENT_MASK)) {
continue;
@@ -145,7 +147,7 @@ static void tlb_info_la48(Monitor *mon, CPUArchState *env,
pdp_addr = pml4e & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
- cpu_physical_memory_read(pdp_addr + l2 * 8, &pdpe, 8);
+ cpu_physical_memory_read_debug(pdp_addr + l2 * 8, &pdpe, 8);
pdpe = le64_to_cpu(pdpe);
if (!(pdpe & PG_PRESENT_MASK)) {
continue;
@@ -160,7 +162,7 @@ static void tlb_info_la48(Monitor *mon, CPUArchState *env,
pd_addr = pdpe & 0x3fffffffff000ULL;
for (l3 = 0; l3 < 512; l3++) {
- cpu_physical_memory_read(pd_addr + l3 * 8, &pde, 8);
+ cpu_physical_memory_read_debug(pd_addr + l3 * 8, &pde, 8);
pde = le64_to_cpu(pde);
if (!(pde & PG_PRESENT_MASK)) {
continue;
@@ -175,9 +177,7 @@ static void tlb_info_la48(Monitor *mon, CPUArchState *env,
pt_addr = pde & 0x3fffffffff000ULL;
for (l4 = 0; l4 < 512; l4++) {
- cpu_physical_memory_read(pt_addr
- + l4 * 8,
- &pte, 8);
+ cpu_physical_memory_read_debug(pt_addr + l4 * 8, &pte, 8);
pte = le64_to_cpu(pte);
if (pte & PG_PRESENT_MASK) {
print_pte(mon, env, (l0 << 48) + (l1 << 39) +
@@ -198,7 +198,7 @@ static void tlb_info_la57(Monitor *mon, CPUArchState *env)
pml5_addr = env->cr[3] & 0x3fffffffff000ULL;
for (l0 = 0; l0 < 512; l0++) {
- cpu_physical_memory_read(pml5_addr + l0 * 8, &pml5e, 8);
+ cpu_physical_memory_read_debug(pml5_addr + l0 * 8, &pml5e, 8);
pml5e = le64_to_cpu(pml5e);
if (pml5e & PG_PRESENT_MASK) {
tlb_info_la48(mon, env, l0, pml5e & 0x3fffffffff000ULL);
@@ -273,7 +273,7 @@ static void mem_info_32(Monitor *mon, CPUArchState *env)
last_prot = 0;
start = -1;
for(l1 = 0; l1 < 1024; l1++) {
- cpu_physical_memory_read(pgd + l1 * 4, &pde, 4);
+ cpu_physical_memory_read_debug(pgd + l1 * 4, &pde, 4);
pde = le32_to_cpu(pde);
end = l1 << 22;
if (pde & PG_PRESENT_MASK) {
@@ -282,7 +282,8 @@ static void mem_info_32(Monitor *mon, CPUArchState *env)
mem_print(mon, &start, &last_prot, end, prot);
} else {
for(l2 = 0; l2 < 1024; l2++) {
- cpu_physical_memory_read((pde & ~0xfff) + l2 * 4, &pte, 4);
+ cpu_physical_memory_read_debug((pde & ~0xfff) + l2 * 4,
+ &pte, 4);
pte = le32_to_cpu(pte);
end = (l1 << 22) + (l2 << 12);
if (pte & PG_PRESENT_MASK) {
@@ -315,13 +316,13 @@ static void mem_info_pae32(Monitor *mon, CPUArchState *env)
last_prot = 0;
start = -1;
for (l1 = 0; l1 < 4; l1++) {
- cpu_physical_memory_read(pdp_addr + l1 * 8, &pdpe, 8);
+ cpu_physical_memory_read_debug(pdp_addr + l1 * 8, &pdpe, 8);
pdpe = le64_to_cpu(pdpe);
end = l1 << 30;
if (pdpe & PG_PRESENT_MASK) {
pd_addr = pdpe & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
- cpu_physical_memory_read(pd_addr + l2 * 8, &pde, 8);
+ cpu_physical_memory_read_debug(pd_addr + l2 * 8, &pde, 8);
pde = le64_to_cpu(pde);
end = (l1 << 30) + (l2 << 21);
if (pde & PG_PRESENT_MASK) {
@@ -332,7 +333,8 @@ static void mem_info_pae32(Monitor *mon, CPUArchState *env)
} else {
pt_addr = pde & 0x3fffffffff000ULL;
for (l3 = 0; l3 < 512; l3++) {
- cpu_physical_memory_read(pt_addr + l3 * 8, &pte, 8);
+ cpu_physical_memory_read_debug(pt_addr + l3 * 8,
+ &pte, 8);
pte = le64_to_cpu(pte);
end = (l1 << 30) + (l2 << 21) + (l3 << 12);
if (pte & PG_PRESENT_MASK) {
@@ -371,13 +373,13 @@ static void mem_info_la48(Monitor *mon, CPUArchState *env)
last_prot = 0;
start = -1;
for (l1 = 0; l1 < 512; l1++) {
- cpu_physical_memory_read(pml4_addr + l1 * 8, &pml4e, 8);
+ cpu_physical_memory_read_debug(pml4_addr + l1 * 8, &pml4e, 8);
pml4e = le64_to_cpu(pml4e);
end = l1 << 39;
if (pml4e & PG_PRESENT_MASK) {
pdp_addr = pml4e & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
- cpu_physical_memory_read(pdp_addr + l2 * 8, &pdpe, 8);
+ cpu_physical_memory_read_debug(pdp_addr + l2 * 8, &pdpe, 8);
pdpe = le64_to_cpu(pdpe);
end = (l1 << 39) + (l2 << 30);
if (pdpe & PG_PRESENT_MASK) {
@@ -389,7 +391,8 @@ static void mem_info_la48(Monitor *mon, CPUArchState *env)
} else {
pd_addr = pdpe & 0x3fffffffff000ULL;
for (l3 = 0; l3 < 512; l3++) {
- cpu_physical_memory_read(pd_addr + l3 * 8, &pde, 8);
+ cpu_physical_memory_read_debug(pd_addr + l3 * 8,
+ &pde, 8);
pde = le64_to_cpu(pde);
end = (l1 << 39) + (l2 << 30) + (l3 << 21);
if (pde & PG_PRESENT_MASK) {
@@ -401,9 +404,9 @@ static void mem_info_la48(Monitor *mon, CPUArchState *env)
} else {
pt_addr = pde & 0x3fffffffff000ULL;
for (l4 = 0; l4 < 512; l4++) {
- cpu_physical_memory_read(pt_addr
- + l4 * 8,
- &pte, 8);
+ cpu_physical_memory_read_debug(pt_addr
+ + l4 * 8,
+ &pte, 8);
pte = le64_to_cpu(pte);
end = (l1 << 39) + (l2 << 30) +
(l3 << 21) + (l4 << 12);
@@ -448,7 +451,7 @@ static void mem_info_la57(Monitor *mon, CPUArchState *env)
last_prot = 0;
start = -1;
for (l0 = 0; l0 < 512; l0++) {
- cpu_physical_memory_read(pml5_addr + l0 * 8, &pml5e, 8);
+ cpu_physical_memory_read_debug(pml5_addr + l0 * 8, &pml5e, 8);
pml5e = le64_to_cpu(pml5e);
end = l0 << 48;
if (!(pml5e & PG_PRESENT_MASK)) {
@@ -459,7 +462,7 @@ static void mem_info_la57(Monitor *mon, CPUArchState *env)
pml4_addr = pml5e & 0x3fffffffff000ULL;
for (l1 = 0; l1 < 512; l1++) {
- cpu_physical_memory_read(pml4_addr + l1 * 8, &pml4e, 8);
+ cpu_physical_memory_read_debug(pml4_addr + l1 * 8, &pml4e, 8);
pml4e = le64_to_cpu(pml4e);
end = (l0 << 48) + (l1 << 39);
if (!(pml4e & PG_PRESENT_MASK)) {
@@ -470,7 +473,7 @@ static void mem_info_la57(Monitor *mon, CPUArchState *env)
pdp_addr = pml4e & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
- cpu_physical_memory_read(pdp_addr + l2 * 8, &pdpe, 8);
+ cpu_physical_memory_read_debug(pdp_addr + l2 * 8, &pdpe, 8);
pdpe = le64_to_cpu(pdpe);
end = (l0 << 48) + (l1 << 39) + (l2 << 30);
if (pdpe & PG_PRESENT_MASK) {
@@ -489,7 +492,7 @@ static void mem_info_la57(Monitor *mon, CPUArchState *env)
pd_addr = pdpe & 0x3fffffffff000ULL;
for (l3 = 0; l3 < 512; l3++) {
- cpu_physical_memory_read(pd_addr + l3 * 8, &pde, 8);
+ cpu_physical_memory_read_debug(pd_addr + l3 * 8, &pde, 8);
pde = le64_to_cpu(pde);
end = (l0 << 48) + (l1 << 39) + (l2 << 30) + (l3 << 21);
if (pde & PG_PRESENT_MASK) {
@@ -508,7 +511,8 @@ static void mem_info_la57(Monitor *mon, CPUArchState *env)
pt_addr = pde & 0x3fffffffff000ULL;
for (l4 = 0; l4 < 512; l4++) {
- cpu_physical_memory_read(pt_addr + l4 * 8, &pte, 8);
+ cpu_physical_memory_read_debug(pt_addr + l4 * 8,
+ &pte, 8);
pte = le64_to_cpu(pte);
end = (l0 << 48) + (l1 << 39) + (l2 << 30) +
(l3 << 21) + (l4 << 12);
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread
* [PATCH v8 05/28] target/i386: add memory encryption feature cpuid support
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:36 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
AMD EPYC processors support memory encryption feature. The feature
is reported through CPUID 8000_001F[EAX].
Fn8000_001F [EAX]:
Bit 0 Secure Memory Encryption (SME) supported
Bit 1 Secure Encrypted Virtualization (SEV) supported
Bit 2 Page flush MSR supported
Bit 3 Ecrypted State (SEV-ES) support
when memory encryption feature is reported, CPUID 8000_001F[EBX] should
provide additional information regarding the feature (such as which page
table bit is used to mark pages as encrypted etc). The information in EBX
and ECX may vary from one family to another hence we use the host cpuid
to populate the EBX information.
The details for memory encryption CPUID is available in AMD APM
(https://support.amd.com/TechDocs/24594.pdf) Section E.4.17
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
target/i386/cpu.c | 36 ++++++++++++++++++++++++++++++++++++
target/i386/cpu.h | 3 +++
2 files changed, 39 insertions(+)
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index b5e431e769da..475d98a44880 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -235,6 +235,7 @@ static void x86_cpu_vendor_words2str(char *dst, uint32_t vendor1,
#define TCG_EXT4_FEATURES 0
#define TCG_SVM_FEATURES 0
#define TCG_KVM_FEATURES 0
+#define TCG_MEM_ENCRYPT_FEATURES 0
#define TCG_7_0_EBX_FEATURES (CPUID_7_0_EBX_SMEP | CPUID_7_0_EBX_SMAP | \
CPUID_7_0_EBX_BMI1 | CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_ADX | \
CPUID_7_0_EBX_PCOMMIT | CPUID_7_0_EBX_CLFLUSHOPT | \
@@ -546,6 +547,20 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
.cpuid_reg = R_EDX,
.tcg_features = ~0U,
},
+ [FEAT_MEM_ENCRYPT] = {
+ .feat_names = {
+ NULL, "sev", NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ },
+ .cpuid_eax = 0x8000001F, .cpuid_reg = R_EAX,
+ .tcg_features = TCG_MEM_ENCRYPT_FEATURES,
+ }
};
typedef struct X86RegisterInfo32 {
@@ -1966,6 +1981,9 @@ static X86CPUDefinition builtin_x86_defs[] = {
CPUID_XSAVE_XGETBV1,
.features[FEAT_6_EAX] =
CPUID_6_EAX_ARAT,
+ /* Missing: SEV_ES */
+ .features[FEAT_MEM_ENCRYPT] =
+ CPUID_8000_001F_EAX_SEV,
.xlevel = 0x8000000A,
.model_id = "AMD EPYC Processor",
},
@@ -3590,6 +3608,19 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
*edx = 0;
}
break;
+ case 0x8000001F:
+ if (env->features[FEAT_MEM_ENCRYPT] & CPUID_8000_001F_EAX_SEV) {
+ *eax = env->features[FEAT_MEM_ENCRYPT];
+ host_cpuid(0x8000001F, 0, NULL, ebx, NULL, NULL);
+ *ecx = 0;
+ *edx = 0;
+ } else {
+ *eax = 0;
+ *ebx = 0;
+ *ecx = 0;
+ *edx = 0;
+ }
+ break;
case 0xC0000000:
*eax = env->cpuid_xlevel2;
*ebx = 0;
@@ -4037,10 +4068,15 @@ static void x86_cpu_expand_features(X86CPU *cpu, Error **errp)
x86_cpu_adjust_feat_level(cpu, FEAT_C000_0001_EDX);
x86_cpu_adjust_feat_level(cpu, FEAT_SVM);
x86_cpu_adjust_feat_level(cpu, FEAT_XSAVE);
+ x86_cpu_adjust_feat_level(cpu, FEAT_MEM_ENCRYPT);
/* SVM requires CPUID[0x8000000A] */
if (env->features[FEAT_8000_0001_ECX] & CPUID_EXT3_SVM) {
x86_cpu_adjust_level(cpu, &env->cpuid_min_xlevel, 0x8000000A);
}
+ /* SEV requires CPUID[0x8000001F] */
+ if ((env->features[FEAT_MEM_ENCRYPT] & CPUID_8000_001F_EAX_SEV)) {
+ x86_cpu_adjust_level(cpu, &env->cpuid_min_xlevel, 0x8000001F);
+ }
}
/* Set cpuid_*level* based on cpuid_min_*level, if not explicitly set */
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index f91e37d25dea..448b30f893fa 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -483,6 +483,7 @@ typedef enum FeatureWord {
FEAT_6_EAX, /* CPUID[6].EAX */
FEAT_XSAVE_COMP_LO, /* CPUID[EAX=0xd,ECX=0].EAX */
FEAT_XSAVE_COMP_HI, /* CPUID[EAX=0xd,ECX=0].EDX */
+ FEAT_MEM_ENCRYPT, /* CPUID[8000_001F].EAX */
FEATURE_WORDS,
} FeatureWord;
@@ -679,6 +680,8 @@ typedef uint32_t FeatureWordArray[FEATURE_WORDS];
#define CPUID_6_EAX_ARAT (1U << 2)
+#define CPUID_8000_001F_EAX_SEV (1U << 1) /* SEV */
+
/* CPUID[0x80000007].EDX flags: */
#define CPUID_APM_INVTSC (1U << 8)
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 05/28] target/i386: add memory encryption feature cpuid support
@ 2018-02-12 15:36 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh, Richard Henderson
AMD EPYC processors support memory encryption feature. The feature
is reported through CPUID 8000_001F[EAX].
Fn8000_001F [EAX]:
Bit 0 Secure Memory Encryption (SME) supported
Bit 1 Secure Encrypted Virtualization (SEV) supported
Bit 2 Page flush MSR supported
Bit 3 Ecrypted State (SEV-ES) support
when memory encryption feature is reported, CPUID 8000_001F[EBX] should
provide additional information regarding the feature (such as which page
table bit is used to mark pages as encrypted etc). The information in EBX
and ECX may vary from one family to another hence we use the host cpuid
to populate the EBX information.
The details for memory encryption CPUID is available in AMD APM
(https://support.amd.com/TechDocs/24594.pdf) Section E.4.17
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
target/i386/cpu.c | 36 ++++++++++++++++++++++++++++++++++++
target/i386/cpu.h | 3 +++
2 files changed, 39 insertions(+)
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index b5e431e769da..475d98a44880 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -235,6 +235,7 @@ static void x86_cpu_vendor_words2str(char *dst, uint32_t vendor1,
#define TCG_EXT4_FEATURES 0
#define TCG_SVM_FEATURES 0
#define TCG_KVM_FEATURES 0
+#define TCG_MEM_ENCRYPT_FEATURES 0
#define TCG_7_0_EBX_FEATURES (CPUID_7_0_EBX_SMEP | CPUID_7_0_EBX_SMAP | \
CPUID_7_0_EBX_BMI1 | CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_ADX | \
CPUID_7_0_EBX_PCOMMIT | CPUID_7_0_EBX_CLFLUSHOPT | \
@@ -546,6 +547,20 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
.cpuid_reg = R_EDX,
.tcg_features = ~0U,
},
+ [FEAT_MEM_ENCRYPT] = {
+ .feat_names = {
+ NULL, "sev", NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL,
+ },
+ .cpuid_eax = 0x8000001F, .cpuid_reg = R_EAX,
+ .tcg_features = TCG_MEM_ENCRYPT_FEATURES,
+ }
};
typedef struct X86RegisterInfo32 {
@@ -1966,6 +1981,9 @@ static X86CPUDefinition builtin_x86_defs[] = {
CPUID_XSAVE_XGETBV1,
.features[FEAT_6_EAX] =
CPUID_6_EAX_ARAT,
+ /* Missing: SEV_ES */
+ .features[FEAT_MEM_ENCRYPT] =
+ CPUID_8000_001F_EAX_SEV,
.xlevel = 0x8000000A,
.model_id = "AMD EPYC Processor",
},
@@ -3590,6 +3608,19 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
*edx = 0;
}
break;
+ case 0x8000001F:
+ if (env->features[FEAT_MEM_ENCRYPT] & CPUID_8000_001F_EAX_SEV) {
+ *eax = env->features[FEAT_MEM_ENCRYPT];
+ host_cpuid(0x8000001F, 0, NULL, ebx, NULL, NULL);
+ *ecx = 0;
+ *edx = 0;
+ } else {
+ *eax = 0;
+ *ebx = 0;
+ *ecx = 0;
+ *edx = 0;
+ }
+ break;
case 0xC0000000:
*eax = env->cpuid_xlevel2;
*ebx = 0;
@@ -4037,10 +4068,15 @@ static void x86_cpu_expand_features(X86CPU *cpu, Error **errp)
x86_cpu_adjust_feat_level(cpu, FEAT_C000_0001_EDX);
x86_cpu_adjust_feat_level(cpu, FEAT_SVM);
x86_cpu_adjust_feat_level(cpu, FEAT_XSAVE);
+ x86_cpu_adjust_feat_level(cpu, FEAT_MEM_ENCRYPT);
/* SVM requires CPUID[0x8000000A] */
if (env->features[FEAT_8000_0001_ECX] & CPUID_EXT3_SVM) {
x86_cpu_adjust_level(cpu, &env->cpuid_min_xlevel, 0x8000000A);
}
+ /* SEV requires CPUID[0x8000001F] */
+ if ((env->features[FEAT_MEM_ENCRYPT] & CPUID_8000_001F_EAX_SEV)) {
+ x86_cpu_adjust_level(cpu, &env->cpuid_min_xlevel, 0x8000001F);
+ }
}
/* Set cpuid_*level* based on cpuid_min_*level, if not explicitly set */
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index f91e37d25dea..448b30f893fa 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -483,6 +483,7 @@ typedef enum FeatureWord {
FEAT_6_EAX, /* CPUID[6].EAX */
FEAT_XSAVE_COMP_LO, /* CPUID[EAX=0xd,ECX=0].EAX */
FEAT_XSAVE_COMP_HI, /* CPUID[EAX=0xd,ECX=0].EDX */
+ FEAT_MEM_ENCRYPT, /* CPUID[8000_001F].EAX */
FEATURE_WORDS,
} FeatureWord;
@@ -679,6 +680,8 @@ typedef uint32_t FeatureWordArray[FEATURE_WORDS];
#define CPUID_6_EAX_ARAT (1U << 2)
+#define CPUID_8000_001F_EAX_SEV (1U << 1) /* SEV */
+
/* CPUID[0x80000007].EDX flags: */
#define CPUID_APM_INVTSC (1U << 8)
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* Re: [PATCH v8 05/28] target/i386: add memory encryption feature cpuid support
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 18:38 ` Eduardo Habkost
-1 siblings, 0 replies; 77+ messages in thread
From: Eduardo Habkost @ 2018-02-12 18:38 UTC (permalink / raw)
To: Brijesh Singh
Cc: qemu-devel, Alistair Francis, Christian Borntraeger,
Cornelia Huck, Daniel P . Berrange, Dr. David Alan Gilbert,
Michael S. Tsirkin, Edgar E. Iglesias, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov
On Mon, Feb 12, 2018 at 09:36:52AM -0600, Brijesh Singh wrote:
> AMD EPYC processors support memory encryption feature. The feature
> is reported through CPUID 8000_001F[EAX].
>
> Fn8000_001F [EAX]:
> Bit 0 Secure Memory Encryption (SME) supported
> Bit 1 Secure Encrypted Virtualization (SEV) supported
> Bit 2 Page flush MSR supported
> Bit 3 Ecrypted State (SEV-ES) support
>
> when memory encryption feature is reported, CPUID 8000_001F[EBX] should
> provide additional information regarding the feature (such as which page
> table bit is used to mark pages as encrypted etc). The information in EBX
> and ECX may vary from one family to another hence we use the host cpuid
> to populate the EBX information.
>
> The details for memory encryption CPUID is available in AMD APM
> (https://support.amd.com/TechDocs/24594.pdf) Section E.4.17
>
> Cc: Paolo Bonzini <pbonzini@redhat.com>
> Cc: Richard Henderson <rth@twiddle.net>
> Cc: Eduardo Habkost <ehabkost@redhat.com>
> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
> ---
> target/i386/cpu.c | 36 ++++++++++++++++++++++++++++++++++++
> target/i386/cpu.h | 3 +++
> 2 files changed, 39 insertions(+)
>
> diff --git a/target/i386/cpu.c b/target/i386/cpu.c
> index b5e431e769da..475d98a44880 100644
> --- a/target/i386/cpu.c
> +++ b/target/i386/cpu.c
> @@ -235,6 +235,7 @@ static void x86_cpu_vendor_words2str(char *dst, uint32_t vendor1,
> #define TCG_EXT4_FEATURES 0
> #define TCG_SVM_FEATURES 0
> #define TCG_KVM_FEATURES 0
> +#define TCG_MEM_ENCRYPT_FEATURES 0
> #define TCG_7_0_EBX_FEATURES (CPUID_7_0_EBX_SMEP | CPUID_7_0_EBX_SMAP | \
> CPUID_7_0_EBX_BMI1 | CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_ADX | \
> CPUID_7_0_EBX_PCOMMIT | CPUID_7_0_EBX_CLFLUSHOPT | \
> @@ -546,6 +547,20 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
> .cpuid_reg = R_EDX,
> .tcg_features = ~0U,
> },
> + [FEAT_MEM_ENCRYPT] = {
> + .feat_names = {
> + NULL, "sev", NULL, NULL,
> + NULL, NULL, NULL, NULL,
> + NULL, NULL, NULL, NULL,
> + NULL, NULL, NULL, NULL,
> + NULL, NULL, NULL, NULL,
> + NULL, NULL, NULL, NULL,
> + NULL, NULL, NULL, NULL,
> + NULL, NULL, NULL, NULL,
> + },
> + .cpuid_eax = 0x8000001F, .cpuid_reg = R_EAX,
> + .tcg_features = TCG_MEM_ENCRYPT_FEATURES,
> + }
What should happen if "-cpu ...,+sev" is used without the
appropriate SEV configuration on the command-line?
> };
>
> typedef struct X86RegisterInfo32 {
> @@ -1966,6 +1981,9 @@ static X86CPUDefinition builtin_x86_defs[] = {
> CPUID_XSAVE_XGETBV1,
> .features[FEAT_6_EAX] =
> CPUID_6_EAX_ARAT,
> + /* Missing: SEV_ES */
> + .features[FEAT_MEM_ENCRYPT] =
> + CPUID_8000_001F_EAX_SEV,
Changing existing CPU models is possible only on very specific
circumstances (where VMs that are currently runnable would always
stay runnable), and would require compat_props entries to keep
compatibility on existing machine-types.
I don't think this is one case where adding the feature will be
safe (even if adding compat code). What about existing VMs that
are running on hosts that don't return SEV on KVM_GET_SUPPORTED_CPUID?
"-cpu EPYC" would become not runnable on those hosts.
(BTW, do you have a pointer to the KVM patches that enable SEV on
KVM_GET_SUPPORTED_CPUID? I couldn't find them.)
> .xlevel = 0x8000000A,
> .model_id = "AMD EPYC Processor",
> },
> @@ -3590,6 +3608,19 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
> *edx = 0;
> }
> break;
> + case 0x8000001F:
> + if (env->features[FEAT_MEM_ENCRYPT] & CPUID_8000_001F_EAX_SEV) {
> + *eax = env->features[FEAT_MEM_ENCRYPT];
> + host_cpuid(0x8000001F, 0, NULL, ebx, NULL, NULL);
This still have the same problem as v6. The CPUID data shouldn't
come from the host CPU, but from the QEMU configuration.
The same QEMU command-line must expose the same machine to the
guest on any host (except on the "host" and "max" CPU models,
that are the only non-migration-safe CPU models).
> + *ecx = 0;
> + *edx = 0;
> + } else {
> + *eax = 0;
> + *ebx = 0;
> + *ecx = 0;
> + *edx = 0;
> + }
> + break;
> case 0xC0000000:
> *eax = env->cpuid_xlevel2;
> *ebx = 0;
> @@ -4037,10 +4068,15 @@ static void x86_cpu_expand_features(X86CPU *cpu, Error **errp)
> x86_cpu_adjust_feat_level(cpu, FEAT_C000_0001_EDX);
> x86_cpu_adjust_feat_level(cpu, FEAT_SVM);
> x86_cpu_adjust_feat_level(cpu, FEAT_XSAVE);
> + x86_cpu_adjust_feat_level(cpu, FEAT_MEM_ENCRYPT);
This call here will automatically increase xlevel to 0x8000001F
if any FEAT_MEM_ENCRYPT feature is set, so...
> /* SVM requires CPUID[0x8000000A] */
> if (env->features[FEAT_8000_0001_ECX] & CPUID_EXT3_SVM) {
> x86_cpu_adjust_level(cpu, &env->cpuid_min_xlevel, 0x8000000A);
> }
> + /* SEV requires CPUID[0x8000001F] */
> + if ((env->features[FEAT_MEM_ENCRYPT] & CPUID_8000_001F_EAX_SEV)) {
> + x86_cpu_adjust_level(cpu, &env->cpuid_min_xlevel, 0x8000001F);
...this code here seems unnecessary.
> + }
> }
>
> /* Set cpuid_*level* based on cpuid_min_*level, if not explicitly set */
> diff --git a/target/i386/cpu.h b/target/i386/cpu.h
> index f91e37d25dea..448b30f893fa 100644
> --- a/target/i386/cpu.h
> +++ b/target/i386/cpu.h
> @@ -483,6 +483,7 @@ typedef enum FeatureWord {
> FEAT_6_EAX, /* CPUID[6].EAX */
> FEAT_XSAVE_COMP_LO, /* CPUID[EAX=0xd,ECX=0].EAX */
> FEAT_XSAVE_COMP_HI, /* CPUID[EAX=0xd,ECX=0].EDX */
> + FEAT_MEM_ENCRYPT, /* CPUID[8000_001F].EAX */
> FEATURE_WORDS,
> } FeatureWord;
>
> @@ -679,6 +680,8 @@ typedef uint32_t FeatureWordArray[FEATURE_WORDS];
>
> #define CPUID_6_EAX_ARAT (1U << 2)
>
> +#define CPUID_8000_001F_EAX_SEV (1U << 1) /* SEV */
> +
> /* CPUID[0x80000007].EDX flags: */
> #define CPUID_APM_INVTSC (1U << 8)
>
> --
> 2.14.3
>
--
Eduardo
^ permalink raw reply [flat|nested] 77+ messages in thread* Re: [Qemu-devel] [PATCH v8 05/28] target/i386: add memory encryption feature cpuid support
@ 2018-02-12 18:38 ` Eduardo Habkost
0 siblings, 0 replies; 77+ messages in thread
From: Eduardo Habkost @ 2018-02-12 18:38 UTC (permalink / raw)
To: Brijesh Singh
Cc: qemu-devel, Alistair Francis, Christian Borntraeger,
Cornelia Huck, Daniel P . Berrange, Dr. David Alan Gilbert,
Michael S. Tsirkin, Edgar E. Iglesias, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Richard Henderson
On Mon, Feb 12, 2018 at 09:36:52AM -0600, Brijesh Singh wrote:
> AMD EPYC processors support memory encryption feature. The feature
> is reported through CPUID 8000_001F[EAX].
>
> Fn8000_001F [EAX]:
> Bit 0 Secure Memory Encryption (SME) supported
> Bit 1 Secure Encrypted Virtualization (SEV) supported
> Bit 2 Page flush MSR supported
> Bit 3 Ecrypted State (SEV-ES) support
>
> when memory encryption feature is reported, CPUID 8000_001F[EBX] should
> provide additional information regarding the feature (such as which page
> table bit is used to mark pages as encrypted etc). The information in EBX
> and ECX may vary from one family to another hence we use the host cpuid
> to populate the EBX information.
>
> The details for memory encryption CPUID is available in AMD APM
> (https://support.amd.com/TechDocs/24594.pdf) Section E.4.17
>
> Cc: Paolo Bonzini <pbonzini@redhat.com>
> Cc: Richard Henderson <rth@twiddle.net>
> Cc: Eduardo Habkost <ehabkost@redhat.com>
> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
> ---
> target/i386/cpu.c | 36 ++++++++++++++++++++++++++++++++++++
> target/i386/cpu.h | 3 +++
> 2 files changed, 39 insertions(+)
>
> diff --git a/target/i386/cpu.c b/target/i386/cpu.c
> index b5e431e769da..475d98a44880 100644
> --- a/target/i386/cpu.c
> +++ b/target/i386/cpu.c
> @@ -235,6 +235,7 @@ static void x86_cpu_vendor_words2str(char *dst, uint32_t vendor1,
> #define TCG_EXT4_FEATURES 0
> #define TCG_SVM_FEATURES 0
> #define TCG_KVM_FEATURES 0
> +#define TCG_MEM_ENCRYPT_FEATURES 0
> #define TCG_7_0_EBX_FEATURES (CPUID_7_0_EBX_SMEP | CPUID_7_0_EBX_SMAP | \
> CPUID_7_0_EBX_BMI1 | CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_ADX | \
> CPUID_7_0_EBX_PCOMMIT | CPUID_7_0_EBX_CLFLUSHOPT | \
> @@ -546,6 +547,20 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
> .cpuid_reg = R_EDX,
> .tcg_features = ~0U,
> },
> + [FEAT_MEM_ENCRYPT] = {
> + .feat_names = {
> + NULL, "sev", NULL, NULL,
> + NULL, NULL, NULL, NULL,
> + NULL, NULL, NULL, NULL,
> + NULL, NULL, NULL, NULL,
> + NULL, NULL, NULL, NULL,
> + NULL, NULL, NULL, NULL,
> + NULL, NULL, NULL, NULL,
> + NULL, NULL, NULL, NULL,
> + },
> + .cpuid_eax = 0x8000001F, .cpuid_reg = R_EAX,
> + .tcg_features = TCG_MEM_ENCRYPT_FEATURES,
> + }
What should happen if "-cpu ...,+sev" is used without the
appropriate SEV configuration on the command-line?
> };
>
> typedef struct X86RegisterInfo32 {
> @@ -1966,6 +1981,9 @@ static X86CPUDefinition builtin_x86_defs[] = {
> CPUID_XSAVE_XGETBV1,
> .features[FEAT_6_EAX] =
> CPUID_6_EAX_ARAT,
> + /* Missing: SEV_ES */
> + .features[FEAT_MEM_ENCRYPT] =
> + CPUID_8000_001F_EAX_SEV,
Changing existing CPU models is possible only on very specific
circumstances (where VMs that are currently runnable would always
stay runnable), and would require compat_props entries to keep
compatibility on existing machine-types.
I don't think this is one case where adding the feature will be
safe (even if adding compat code). What about existing VMs that
are running on hosts that don't return SEV on KVM_GET_SUPPORTED_CPUID?
"-cpu EPYC" would become not runnable on those hosts.
(BTW, do you have a pointer to the KVM patches that enable SEV on
KVM_GET_SUPPORTED_CPUID? I couldn't find them.)
> .xlevel = 0x8000000A,
> .model_id = "AMD EPYC Processor",
> },
> @@ -3590,6 +3608,19 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
> *edx = 0;
> }
> break;
> + case 0x8000001F:
> + if (env->features[FEAT_MEM_ENCRYPT] & CPUID_8000_001F_EAX_SEV) {
> + *eax = env->features[FEAT_MEM_ENCRYPT];
> + host_cpuid(0x8000001F, 0, NULL, ebx, NULL, NULL);
This still have the same problem as v6. The CPUID data shouldn't
come from the host CPU, but from the QEMU configuration.
The same QEMU command-line must expose the same machine to the
guest on any host (except on the "host" and "max" CPU models,
that are the only non-migration-safe CPU models).
> + *ecx = 0;
> + *edx = 0;
> + } else {
> + *eax = 0;
> + *ebx = 0;
> + *ecx = 0;
> + *edx = 0;
> + }
> + break;
> case 0xC0000000:
> *eax = env->cpuid_xlevel2;
> *ebx = 0;
> @@ -4037,10 +4068,15 @@ static void x86_cpu_expand_features(X86CPU *cpu, Error **errp)
> x86_cpu_adjust_feat_level(cpu, FEAT_C000_0001_EDX);
> x86_cpu_adjust_feat_level(cpu, FEAT_SVM);
> x86_cpu_adjust_feat_level(cpu, FEAT_XSAVE);
> + x86_cpu_adjust_feat_level(cpu, FEAT_MEM_ENCRYPT);
This call here will automatically increase xlevel to 0x8000001F
if any FEAT_MEM_ENCRYPT feature is set, so...
> /* SVM requires CPUID[0x8000000A] */
> if (env->features[FEAT_8000_0001_ECX] & CPUID_EXT3_SVM) {
> x86_cpu_adjust_level(cpu, &env->cpuid_min_xlevel, 0x8000000A);
> }
> + /* SEV requires CPUID[0x8000001F] */
> + if ((env->features[FEAT_MEM_ENCRYPT] & CPUID_8000_001F_EAX_SEV)) {
> + x86_cpu_adjust_level(cpu, &env->cpuid_min_xlevel, 0x8000001F);
...this code here seems unnecessary.
> + }
> }
>
> /* Set cpuid_*level* based on cpuid_min_*level, if not explicitly set */
> diff --git a/target/i386/cpu.h b/target/i386/cpu.h
> index f91e37d25dea..448b30f893fa 100644
> --- a/target/i386/cpu.h
> +++ b/target/i386/cpu.h
> @@ -483,6 +483,7 @@ typedef enum FeatureWord {
> FEAT_6_EAX, /* CPUID[6].EAX */
> FEAT_XSAVE_COMP_LO, /* CPUID[EAX=0xd,ECX=0].EAX */
> FEAT_XSAVE_COMP_HI, /* CPUID[EAX=0xd,ECX=0].EDX */
> + FEAT_MEM_ENCRYPT, /* CPUID[8000_001F].EAX */
> FEATURE_WORDS,
> } FeatureWord;
>
> @@ -679,6 +680,8 @@ typedef uint32_t FeatureWordArray[FEATURE_WORDS];
>
> #define CPUID_6_EAX_ARAT (1U << 2)
>
> +#define CPUID_8000_001F_EAX_SEV (1U << 1) /* SEV */
> +
> /* CPUID[0x80000007].EDX flags: */
> #define CPUID_APM_INVTSC (1U << 8)
>
> --
> 2.14.3
>
--
Eduardo
^ permalink raw reply [flat|nested] 77+ messages in thread* Re: [PATCH v8 05/28] target/i386: add memory encryption feature cpuid support
2018-02-12 18:38 ` [Qemu-devel] " Eduardo Habkost
@ 2018-02-12 21:07 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 21:07 UTC (permalink / raw)
To: Eduardo Habkost
Cc: brijesh.singh, qemu-devel, Alistair Francis,
Christian Borntraeger, Cornelia Huck, Daniel P . Berrange,
Dr. David Alan Gilbert, Michael S. Tsirkin, Edgar E. Iglesias,
Eric Blake, kvm, Marcel Apfelbaum, Markus Armbruster,
Paolo Bonzini, Peter Crosthwaite, Peter Maydell,
Richard Henderson, Stefan Hajnoczi, Thomas Lendacky, Borisl
On 2/12/18 12:38 PM, Eduardo Habkost wrote:
> On Mon, Feb 12, 2018 at 09:36:52AM -0600, Brijesh Singh wrote:
>> AMD EPYC processors support memory encryption feature. The feature
>> is reported through CPUID 8000_001F[EAX].
>>
>> Fn8000_001F [EAX]:
>> Bit 0 Secure Memory Encryption (SME) supported
>> Bit 1 Secure Encrypted Virtualization (SEV) supported
>> Bit 2 Page flush MSR supported
>> Bit 3 Ecrypted State (SEV-ES) support
>>
>> when memory encryption feature is reported, CPUID 8000_001F[EBX] should
>> provide additional information regarding the feature (such as which page
>> table bit is used to mark pages as encrypted etc). The information in EBX
>> and ECX may vary from one family to another hence we use the host cpuid
>> to populate the EBX information.
>>
>> The details for memory encryption CPUID is available in AMD APM
>> (https://support.amd.com/TechDocs/24594.pdf) Section E.4.17
>>
>> Cc: Paolo Bonzini <pbonzini@redhat.com>
>> Cc: Richard Henderson <rth@twiddle.net>
>> Cc: Eduardo Habkost <ehabkost@redhat.com>
>> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
>> ---
>> target/i386/cpu.c | 36 ++++++++++++++++++++++++++++++++++++
>> target/i386/cpu.h | 3 +++
>> 2 files changed, 39 insertions(+)
>>
>> diff --git a/target/i386/cpu.c b/target/i386/cpu.c
>> index b5e431e769da..475d98a44880 100644
>> --- a/target/i386/cpu.c
>> +++ b/target/i386/cpu.c
>> @@ -235,6 +235,7 @@ static void x86_cpu_vendor_words2str(char *dst, uint32_t vendor1,
>> #define TCG_EXT4_FEATURES 0
>> #define TCG_SVM_FEATURES 0
>> #define TCG_KVM_FEATURES 0
>> +#define TCG_MEM_ENCRYPT_FEATURES 0
>> #define TCG_7_0_EBX_FEATURES (CPUID_7_0_EBX_SMEP | CPUID_7_0_EBX_SMAP | \
>> CPUID_7_0_EBX_BMI1 | CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_ADX | \
>> CPUID_7_0_EBX_PCOMMIT | CPUID_7_0_EBX_CLFLUSHOPT | \
>> @@ -546,6 +547,20 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
>> .cpuid_reg = R_EDX,
>> .tcg_features = ~0U,
>> },
>> + [FEAT_MEM_ENCRYPT] = {
>> + .feat_names = {
>> + NULL, "sev", NULL, NULL,
>> + NULL, NULL, NULL, NULL,
>> + NULL, NULL, NULL, NULL,
>> + NULL, NULL, NULL, NULL,
>> + NULL, NULL, NULL, NULL,
>> + NULL, NULL, NULL, NULL,
>> + NULL, NULL, NULL, NULL,
>> + NULL, NULL, NULL, NULL,
>> + },
>> + .cpuid_eax = 0x8000001F, .cpuid_reg = R_EAX,
>> + .tcg_features = TCG_MEM_ENCRYPT_FEATURES,
>> + }
> What should happen if "-cpu ...,+sev" is used without the
> appropriate SEV configuration on the command-line?
>
If host supports SEV feature then we should communicate guest that SEV
feature is available but not enabled. At least that's what I am doing
today. Having said that, I am flexible to change if you all things
otherwise. We could abort the launch if SEV configuration is missing and
feature is enabled.
In current implementation, when -cpu ...,+sev is passed without
appropriate SEV configuration then we populate the Fn8000_001F CPUID but
VMCB will not have SEV bit set hence a guest will be launched as
non-SEV. The presence of Fn8000_001F provides the hint that HW supports
the SEV feature but does not mean that it is enabled. A guest OS need to
call MSR_AMD64_SEV (0xc001_0131) to determine if SEV is enabled. The
MSR_AMD64_SEV is non interceptable read-only MSR. This MSR is set by the
HW when SEV bit is enabled in VMCB. SEV bit in VMCB is enabled only when
qemu adds those extra SEV configuration (i.e KVM_SEV_INIT is success)
The steps used by guest OS to determine SEV active is documented here [1]
[1]
https://git.kernel.org/pub/scm/virt/kvm/kvm.git/tree/Documentation/x86/amd-memory-encryption.txt?h=linux-next#n57
>
>> };
>>
>> typedef struct X86RegisterInfo32 {
>> @@ -1966,6 +1981,9 @@ static X86CPUDefinition builtin_x86_defs[] = {
>> CPUID_XSAVE_XGETBV1,
>> .features[FEAT_6_EAX] =
>> CPUID_6_EAX_ARAT,
>> + /* Missing: SEV_ES */
>> + .features[FEAT_MEM_ENCRYPT] =
>> + CPUID_8000_001F_EAX_SEV,
> Changing existing CPU models is possible only on very specific
> circumstances (where VMs that are currently runnable would always
> stay runnable), and would require compat_props entries to keep
> compatibility on existing machine-types.
Ah I didn't consider that case. What is recommendation, should we create
a new CPU Model (EPYC-SEV) ?
> I don't think this is one case where adding the feature will be
> safe (even if adding compat code). What about existing VMs that
> are running on hosts that don't return SEV on KVM_GET_SUPPORTED_CPUID?
> "-cpu EPYC" would become not runnable on those hosts.
>
> (BTW, do you have a pointer to the KVM patches that enable SEV on
> KVM_GET_SUPPORTED_CPUID? I couldn't find them.)
>
https://git.kernel.org/pub/scm/virt/kvm/kvm.git/commit/?h=linux-next&id=8765d75329a386dd7742f94a1ea5fdcdea8d93d0
>> .xlevel = 0x8000000A,
>> .model_id = "AMD EPYC Processor",
>> },
>> @@ -3590,6 +3608,19 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
>> *edx = 0;
>> }
>> break;
>> + case 0x8000001F:
>> + if (env->features[FEAT_MEM_ENCRYPT] & CPUID_8000_001F_EAX_SEV) {
>> + *eax = env->features[FEAT_MEM_ENCRYPT];
>> + host_cpuid(0x8000001F, 0, NULL, ebx, NULL, NULL);
> This still have the same problem as v6. The CPUID data shouldn't
> come from the host CPU, but from the QEMU configuration.
During SEV guest configuration parsing we validate cbit position passed
through QEMU configure against the host and assert if verification fails
hence I thought it was OK to call host_cpuid() later in the code path.
Please note that EBX contains two information 1# C-bit position and 2#
physical address bit reduction. Both of these information need to filled
for the SEV guest. The physical address bit reduction depends on C-bit
position and I have expose only C-bit position configuration to qemu
command line. I was not sure if we should expose physical address bit
reduction in qemu cmdline and then construct EBX using those two
information.
> The same QEMU command-line must expose the same machine to the
> guest on any host (except on the "host" and "max" CPU models,
> that are the only non-migration-safe CPU models).
>
>
>> + *ecx = 0;
>> + *edx = 0;
>> + } else {
>> + *eax = 0;
>> + *ebx = 0;
>> + *ecx = 0;
>> + *edx = 0;
>> + }
>> + break;
>> case 0xC0000000:
>> *eax = env->cpuid_xlevel2;
>> *ebx = 0;
>> @@ -4037,10 +4068,15 @@ static void x86_cpu_expand_features(X86CPU *cpu, Error **errp)
>> x86_cpu_adjust_feat_level(cpu, FEAT_C000_0001_EDX);
>> x86_cpu_adjust_feat_level(cpu, FEAT_SVM);
>> x86_cpu_adjust_feat_level(cpu, FEAT_XSAVE);
>> + x86_cpu_adjust_feat_level(cpu, FEAT_MEM_ENCRYPT);
> This call here will automatically increase xlevel to 0x8000001F
> if any FEAT_MEM_ENCRYPT feature is set, so...
>
>
>> /* SVM requires CPUID[0x8000000A] */
>> if (env->features[FEAT_8000_0001_ECX] & CPUID_EXT3_SVM) {
>> x86_cpu_adjust_level(cpu, &env->cpuid_min_xlevel, 0x8000000A);
>> }
>> + /* SEV requires CPUID[0x8000001F] */
>> + if ((env->features[FEAT_MEM_ENCRYPT] & CPUID_8000_001F_EAX_SEV)) {
>> + x86_cpu_adjust_level(cpu, &env->cpuid_min_xlevel, 0x8000001F);
> ...this code here seems unnecessary.
>
>
>> + }
>> }
>>
>> /* Set cpuid_*level* based on cpuid_min_*level, if not explicitly set */
>> diff --git a/target/i386/cpu.h b/target/i386/cpu.h
>> index f91e37d25dea..448b30f893fa 100644
>> --- a/target/i386/cpu.h
>> +++ b/target/i386/cpu.h
>> @@ -483,6 +483,7 @@ typedef enum FeatureWord {
>> FEAT_6_EAX, /* CPUID[6].EAX */
>> FEAT_XSAVE_COMP_LO, /* CPUID[EAX=0xd,ECX=0].EAX */
>> FEAT_XSAVE_COMP_HI, /* CPUID[EAX=0xd,ECX=0].EDX */
>> + FEAT_MEM_ENCRYPT, /* CPUID[8000_001F].EAX */
>> FEATURE_WORDS,
>> } FeatureWord;
>>
>> @@ -679,6 +680,8 @@ typedef uint32_t FeatureWordArray[FEATURE_WORDS];
>>
>> #define CPUID_6_EAX_ARAT (1U << 2)
>>
>> +#define CPUID_8000_001F_EAX_SEV (1U << 1) /* SEV */
>> +
>> /* CPUID[0x80000007].EDX flags: */
>> #define CPUID_APM_INVTSC (1U << 8)
>>
>> --
>> 2.14.3
>>
^ permalink raw reply [flat|nested] 77+ messages in thread* Re: [Qemu-devel] [PATCH v8 05/28] target/i386: add memory encryption feature cpuid support
@ 2018-02-12 21:07 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 21:07 UTC (permalink / raw)
To: Eduardo Habkost
Cc: brijesh.singh, qemu-devel, Alistair Francis,
Christian Borntraeger, Cornelia Huck, Daniel P . Berrange,
Dr. David Alan Gilbert, Michael S. Tsirkin, Edgar E. Iglesias,
Eric Blake, kvm, Marcel Apfelbaum, Markus Armbruster,
Paolo Bonzini, Peter Crosthwaite, Peter Maydell,
Richard Henderson, Stefan Hajnoczi, Thomas Lendacky,
Borislav Petkov, Alexander Graf, Bruce Rogers, Richard Henderson
On 2/12/18 12:38 PM, Eduardo Habkost wrote:
> On Mon, Feb 12, 2018 at 09:36:52AM -0600, Brijesh Singh wrote:
>> AMD EPYC processors support memory encryption feature. The feature
>> is reported through CPUID 8000_001F[EAX].
>>
>> Fn8000_001F [EAX]:
>> Bit 0 Secure Memory Encryption (SME) supported
>> Bit 1 Secure Encrypted Virtualization (SEV) supported
>> Bit 2 Page flush MSR supported
>> Bit 3 Ecrypted State (SEV-ES) support
>>
>> when memory encryption feature is reported, CPUID 8000_001F[EBX] should
>> provide additional information regarding the feature (such as which page
>> table bit is used to mark pages as encrypted etc). The information in EBX
>> and ECX may vary from one family to another hence we use the host cpuid
>> to populate the EBX information.
>>
>> The details for memory encryption CPUID is available in AMD APM
>> (https://support.amd.com/TechDocs/24594.pdf) Section E.4.17
>>
>> Cc: Paolo Bonzini <pbonzini@redhat.com>
>> Cc: Richard Henderson <rth@twiddle.net>
>> Cc: Eduardo Habkost <ehabkost@redhat.com>
>> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
>> ---
>> target/i386/cpu.c | 36 ++++++++++++++++++++++++++++++++++++
>> target/i386/cpu.h | 3 +++
>> 2 files changed, 39 insertions(+)
>>
>> diff --git a/target/i386/cpu.c b/target/i386/cpu.c
>> index b5e431e769da..475d98a44880 100644
>> --- a/target/i386/cpu.c
>> +++ b/target/i386/cpu.c
>> @@ -235,6 +235,7 @@ static void x86_cpu_vendor_words2str(char *dst, uint32_t vendor1,
>> #define TCG_EXT4_FEATURES 0
>> #define TCG_SVM_FEATURES 0
>> #define TCG_KVM_FEATURES 0
>> +#define TCG_MEM_ENCRYPT_FEATURES 0
>> #define TCG_7_0_EBX_FEATURES (CPUID_7_0_EBX_SMEP | CPUID_7_0_EBX_SMAP | \
>> CPUID_7_0_EBX_BMI1 | CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_ADX | \
>> CPUID_7_0_EBX_PCOMMIT | CPUID_7_0_EBX_CLFLUSHOPT | \
>> @@ -546,6 +547,20 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
>> .cpuid_reg = R_EDX,
>> .tcg_features = ~0U,
>> },
>> + [FEAT_MEM_ENCRYPT] = {
>> + .feat_names = {
>> + NULL, "sev", NULL, NULL,
>> + NULL, NULL, NULL, NULL,
>> + NULL, NULL, NULL, NULL,
>> + NULL, NULL, NULL, NULL,
>> + NULL, NULL, NULL, NULL,
>> + NULL, NULL, NULL, NULL,
>> + NULL, NULL, NULL, NULL,
>> + NULL, NULL, NULL, NULL,
>> + },
>> + .cpuid_eax = 0x8000001F, .cpuid_reg = R_EAX,
>> + .tcg_features = TCG_MEM_ENCRYPT_FEATURES,
>> + }
> What should happen if "-cpu ...,+sev" is used without the
> appropriate SEV configuration on the command-line?
>
If host supports SEV feature then we should communicate guest that SEV
feature is available but not enabled. At least that's what I am doing
today. Having said that, I am flexible to change if you all things
otherwise. We could abort the launch if SEV configuration is missing and
feature is enabled.
In current implementation, when -cpu ...,+sev is passed without
appropriate SEV configuration then we populate the Fn8000_001F CPUID but
VMCB will not have SEV bit set hence a guest will be launched as
non-SEV. The presence of Fn8000_001F provides the hint that HW supports
the SEV feature but does not mean that it is enabled. A guest OS need to
call MSR_AMD64_SEV (0xc001_0131) to determine if SEV is enabled. The
MSR_AMD64_SEV is non interceptable read-only MSR. This MSR is set by the
HW when SEV bit is enabled in VMCB. SEV bit in VMCB is enabled only when
qemu adds those extra SEV configuration (i.e KVM_SEV_INIT is success)
The steps used by guest OS to determine SEV active is documented here [1]
[1]
https://git.kernel.org/pub/scm/virt/kvm/kvm.git/tree/Documentation/x86/amd-memory-encryption.txt?h=linux-next#n57
>
>> };
>>
>> typedef struct X86RegisterInfo32 {
>> @@ -1966,6 +1981,9 @@ static X86CPUDefinition builtin_x86_defs[] = {
>> CPUID_XSAVE_XGETBV1,
>> .features[FEAT_6_EAX] =
>> CPUID_6_EAX_ARAT,
>> + /* Missing: SEV_ES */
>> + .features[FEAT_MEM_ENCRYPT] =
>> + CPUID_8000_001F_EAX_SEV,
> Changing existing CPU models is possible only on very specific
> circumstances (where VMs that are currently runnable would always
> stay runnable), and would require compat_props entries to keep
> compatibility on existing machine-types.
Ah I didn't consider that case. What is recommendation, should we create
a new CPU Model (EPYC-SEV) ?
> I don't think this is one case where adding the feature will be
> safe (even if adding compat code). What about existing VMs that
> are running on hosts that don't return SEV on KVM_GET_SUPPORTED_CPUID?
> "-cpu EPYC" would become not runnable on those hosts.
>
> (BTW, do you have a pointer to the KVM patches that enable SEV on
> KVM_GET_SUPPORTED_CPUID? I couldn't find them.)
>
https://git.kernel.org/pub/scm/virt/kvm/kvm.git/commit/?h=linux-next&id=8765d75329a386dd7742f94a1ea5fdcdea8d93d0
>> .xlevel = 0x8000000A,
>> .model_id = "AMD EPYC Processor",
>> },
>> @@ -3590,6 +3608,19 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
>> *edx = 0;
>> }
>> break;
>> + case 0x8000001F:
>> + if (env->features[FEAT_MEM_ENCRYPT] & CPUID_8000_001F_EAX_SEV) {
>> + *eax = env->features[FEAT_MEM_ENCRYPT];
>> + host_cpuid(0x8000001F, 0, NULL, ebx, NULL, NULL);
> This still have the same problem as v6. The CPUID data shouldn't
> come from the host CPU, but from the QEMU configuration.
During SEV guest configuration parsing we validate cbit position passed
through QEMU configure against the host and assert if verification fails
hence I thought it was OK to call host_cpuid() later in the code path.
Please note that EBX contains two information 1# C-bit position and 2#
physical address bit reduction. Both of these information need to filled
for the SEV guest. The physical address bit reduction depends on C-bit
position and I have expose only C-bit position configuration to qemu
command line. I was not sure if we should expose physical address bit
reduction in qemu cmdline and then construct EBX using those two
information.
> The same QEMU command-line must expose the same machine to the
> guest on any host (except on the "host" and "max" CPU models,
> that are the only non-migration-safe CPU models).
>
>
>> + *ecx = 0;
>> + *edx = 0;
>> + } else {
>> + *eax = 0;
>> + *ebx = 0;
>> + *ecx = 0;
>> + *edx = 0;
>> + }
>> + break;
>> case 0xC0000000:
>> *eax = env->cpuid_xlevel2;
>> *ebx = 0;
>> @@ -4037,10 +4068,15 @@ static void x86_cpu_expand_features(X86CPU *cpu, Error **errp)
>> x86_cpu_adjust_feat_level(cpu, FEAT_C000_0001_EDX);
>> x86_cpu_adjust_feat_level(cpu, FEAT_SVM);
>> x86_cpu_adjust_feat_level(cpu, FEAT_XSAVE);
>> + x86_cpu_adjust_feat_level(cpu, FEAT_MEM_ENCRYPT);
> This call here will automatically increase xlevel to 0x8000001F
> if any FEAT_MEM_ENCRYPT feature is set, so...
>
>
>> /* SVM requires CPUID[0x8000000A] */
>> if (env->features[FEAT_8000_0001_ECX] & CPUID_EXT3_SVM) {
>> x86_cpu_adjust_level(cpu, &env->cpuid_min_xlevel, 0x8000000A);
>> }
>> + /* SEV requires CPUID[0x8000001F] */
>> + if ((env->features[FEAT_MEM_ENCRYPT] & CPUID_8000_001F_EAX_SEV)) {
>> + x86_cpu_adjust_level(cpu, &env->cpuid_min_xlevel, 0x8000001F);
> ...this code here seems unnecessary.
>
>
>> + }
>> }
>>
>> /* Set cpuid_*level* based on cpuid_min_*level, if not explicitly set */
>> diff --git a/target/i386/cpu.h b/target/i386/cpu.h
>> index f91e37d25dea..448b30f893fa 100644
>> --- a/target/i386/cpu.h
>> +++ b/target/i386/cpu.h
>> @@ -483,6 +483,7 @@ typedef enum FeatureWord {
>> FEAT_6_EAX, /* CPUID[6].EAX */
>> FEAT_XSAVE_COMP_LO, /* CPUID[EAX=0xd,ECX=0].EAX */
>> FEAT_XSAVE_COMP_HI, /* CPUID[EAX=0xd,ECX=0].EDX */
>> + FEAT_MEM_ENCRYPT, /* CPUID[8000_001F].EAX */
>> FEATURE_WORDS,
>> } FeatureWord;
>>
>> @@ -679,6 +680,8 @@ typedef uint32_t FeatureWordArray[FEATURE_WORDS];
>>
>> #define CPUID_6_EAX_ARAT (1U << 2)
>>
>> +#define CPUID_8000_001F_EAX_SEV (1U << 1) /* SEV */
>> +
>> /* CPUID[0x80000007].EDX flags: */
>> #define CPUID_APM_INVTSC (1U << 8)
>>
>> --
>> 2.14.3
>>
^ permalink raw reply [flat|nested] 77+ messages in thread* Re: [PATCH v8 05/28] target/i386: add memory encryption feature cpuid support
2018-02-12 21:07 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 21:19 ` Borislav Petkov
-1 siblings, 0 replies; 77+ messages in thread
From: Borislav Petkov @ 2018-02-12 21:19 UTC (permalink / raw)
To: Brijesh Singh, Eduardo Habkost
Cc: qemu-devel, Alistair Francis, Christian Borntraeger,
Cornelia Huck, Daniel P . Berrange, Dr. David Alan Gilbert,
Michael S. Tsirkin, Edgar E. Iglesias, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Alexander Graf
On Mon, Feb 12, 2018 at 03:07:26PM -0600, Brijesh Singh wrote:
> In current implementation, when -cpu ...,+sev is passed without
> appropriate SEV configuration then we populate the Fn8000_001F CPUID but
> VMCB will not have SEV bit set hence a guest will be launched as
> non-SEV.
I think we should fail the guest init if sev is not really supported by
the host. Otherwise people might get mislead.
> > Changing existing CPU models is possible only on very specific
> > circumstances (where VMs that are currently runnable would always
> > stay runnable), and would require compat_props entries to keep
> > compatibility on existing machine-types.
>
> Ah I didn't consider that case. What is recommendation, should we create
> a new CPU Model (EPYC-SEV) ?
Can we please stop creating a new CPU model with every new CPUID feature
support added? This is just ridiculous.
If this is about live migration, then by all means, fail the migration
if the feature bits are not compatible. But replicating CPU models and
then adding one new differing feature doesn't make any sense.
--
Regards/Gruss,
Boris.
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--
^ permalink raw reply [flat|nested] 77+ messages in thread* Re: [Qemu-devel] [PATCH v8 05/28] target/i386: add memory encryption feature cpuid support
@ 2018-02-12 21:19 ` Borislav Petkov
0 siblings, 0 replies; 77+ messages in thread
From: Borislav Petkov @ 2018-02-12 21:19 UTC (permalink / raw)
To: Brijesh Singh, Eduardo Habkost
Cc: qemu-devel, Alistair Francis, Christian Borntraeger,
Cornelia Huck, Daniel P . Berrange, Dr. David Alan Gilbert,
Michael S. Tsirkin, Edgar E. Iglesias, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Alexander Graf, Bruce Rogers,
Richard Henderson
On Mon, Feb 12, 2018 at 03:07:26PM -0600, Brijesh Singh wrote:
> In current implementation, when -cpu ...,+sev is passed without
> appropriate SEV configuration then we populate the Fn8000_001F CPUID but
> VMCB will not have SEV bit set hence a guest will be launched as
> non-SEV.
I think we should fail the guest init if sev is not really supported by
the host. Otherwise people might get mislead.
> > Changing existing CPU models is possible only on very specific
> > circumstances (where VMs that are currently runnable would always
> > stay runnable), and would require compat_props entries to keep
> > compatibility on existing machine-types.
>
> Ah I didn't consider that case. What is recommendation, should we create
> a new CPU Model (EPYC-SEV) ?
Can we please stop creating a new CPU model with every new CPUID feature
support added? This is just ridiculous.
If this is about live migration, then by all means, fail the migration
if the feature bits are not compatible. But replicating CPU models and
then adding one new differing feature doesn't make any sense.
--
Regards/Gruss,
Boris.
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--
^ permalink raw reply [flat|nested] 77+ messages in thread* Re: [PATCH v8 05/28] target/i386: add memory encryption feature cpuid support
2018-02-12 21:19 ` [Qemu-devel] " Borislav Petkov
@ 2018-02-13 15:39 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-13 15:39 UTC (permalink / raw)
To: Borislav Petkov
Cc: Edgar E. Iglesias, Peter Maydell, Cornelia Huck, Brijesh Singh,
Eduardo Habkost, kvm, Michael S. Tsirkin, Stefan Hajnoczi,
Peter Crosthwaite, Richard Henderson, Markus Armbruster,
qemu-devel, Christian Borntraeger, Alexander Graf,
Marcel Apfelbaum, Paolo Bonzini, Thomas Lendacky,
Alistair Francis, Bruce Rogers, Dr. David Alan Gilbert,
Richard Henderson
On Mon, Feb 12, 2018 at 3:19 PM, Borislav Petkov <bp@suse.de> wrote:
> On Mon, Feb 12, 2018 at 03:07:26PM -0600, Brijesh Singh wrote:
> > In current implementation, when -cpu ...,+sev is passed without
> > appropriate SEV configuration then we populate the Fn8000_001F CPUID but
> > VMCB will not have SEV bit set hence a guest will be launched as
> > non-SEV.
>
> I think we should fail the guest init if sev is not really supported by
> the host. Otherwise people might get mislead.
>
>
Sure I will do that. We can simplify this patch if we don't fill the CPUID
for non SEV guest. I am thinking of doing something like this:
"If SEV configration is provided in QEMU command line then
automatically increase xlevel to 0x8000_001F and populate the EAX and EBX
registers"
> > > Changing existing CPU models is possible only on very specific
> > > circumstances (where VMs that are currently runnable would always
> > > stay runnable), and would require compat_props entries to keep
> > > compatibility on existing machine-types.
> >
> > Ah I didn't consider that case. What is recommendation, should we create
> > a new CPU Model (EPYC-SEV) ?
>
> Can we please stop creating a new CPU model with every new CPUID feature
> support added? This is just ridiculous.
>
> If this is about live migration, then by all means, fail the migration
> if the feature bits are not compatible. But replicating CPU models and
> then adding one new differing feature doesn't make any sense.
>
>
Yes, I think we should be able to avoid creating new CPU model to handle
this case.
I am leaning towards dropping this patch and implement logic to populate the
CPUID 0x8000_001F only when SEV is enabled. This should not require any
changes
in existing CPU model feature flag and live migration of existing guest
should work fine.
> --
> Regards/Gruss,
> Boris.
>
> SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB
> 21284 (AG Nürnberg)
> --
>
>
^ permalink raw reply [flat|nested] 77+ messages in thread
* Re: [Qemu-devel] [PATCH v8 05/28] target/i386: add memory encryption feature cpuid support
@ 2018-02-13 15:39 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-13 15:39 UTC (permalink / raw)
To: Borislav Petkov
Cc: Brijesh Singh, Eduardo Habkost, Edgar E. Iglesias, Peter Maydell,
kvm, Michael S. Tsirkin, Marcel Apfelbaum, Markus Armbruster,
Peter Crosthwaite, Richard Henderson, qemu-devel,
Dr. David Alan Gilbert, Christian Borntraeger, Alexander Graf,
Stefan Hajnoczi, Cornelia Huck, Paolo Bonzini, Thomas Lendacky,
Alistair Francis, Bruce Rogers, Richard Henderson
On Mon, Feb 12, 2018 at 3:19 PM, Borislav Petkov <bp@suse.de> wrote:
> On Mon, Feb 12, 2018 at 03:07:26PM -0600, Brijesh Singh wrote:
> > In current implementation, when -cpu ...,+sev is passed without
> > appropriate SEV configuration then we populate the Fn8000_001F CPUID but
> > VMCB will not have SEV bit set hence a guest will be launched as
> > non-SEV.
>
> I think we should fail the guest init if sev is not really supported by
> the host. Otherwise people might get mislead.
>
>
Sure I will do that. We can simplify this patch if we don't fill the CPUID
for non SEV guest. I am thinking of doing something like this:
"If SEV configration is provided in QEMU command line then
automatically increase xlevel to 0x8000_001F and populate the EAX and EBX
registers"
> > > Changing existing CPU models is possible only on very specific
> > > circumstances (where VMs that are currently runnable would always
> > > stay runnable), and would require compat_props entries to keep
> > > compatibility on existing machine-types.
> >
> > Ah I didn't consider that case. What is recommendation, should we create
> > a new CPU Model (EPYC-SEV) ?
>
> Can we please stop creating a new CPU model with every new CPUID feature
> support added? This is just ridiculous.
>
> If this is about live migration, then by all means, fail the migration
> if the feature bits are not compatible. But replicating CPU models and
> then adding one new differing feature doesn't make any sense.
>
>
Yes, I think we should be able to avoid creating new CPU model to handle
this case.
I am leaning towards dropping this patch and implement logic to populate the
CPUID 0x8000_001F only when SEV is enabled. This should not require any
changes
in existing CPU model feature flag and live migration of existing guest
should work fine.
> --
> Regards/Gruss,
> Boris.
>
> SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB
> 21284 (AG Nürnberg)
> --
>
>
^ permalink raw reply [flat|nested] 77+ messages in thread
* Re: [Qemu-devel] [PATCH v8 05/28] target/i386: add memory encryption feature cpuid support
2018-02-13 15:39 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-13 15:41 ` Borislav Petkov
-1 siblings, 0 replies; 77+ messages in thread
From: Borislav Petkov @ 2018-02-13 15:41 UTC (permalink / raw)
To: Brijesh Singh
Cc: Brijesh Singh, Eduardo Habkost, Edgar E. Iglesias, Peter Maydell,
kvm, Michael S. Tsirkin, Marcel Apfelbaum, Markus Armbruster,
Peter Crosthwaite, Richard Henderson, qemu-devel,
Dr. David Alan Gilbert, Christian Borntraeger, Alexander Graf,
Stefan Hajnoczi, Cornelia Huck, Paolo Bonzini, Thomas Lendacky,
Alistair Francis
On Tue, Feb 13, 2018 at 09:39:01AM -0600, Brijesh Singh wrote:
> Yes, I think we should be able to avoid creating new CPU model to
> handle this case. I am leaning towards dropping this patch and
> implement logic to populate the CPUID 0x8000_001F only when SEV is
> enabled. This should not require any changes in existing CPU model
> feature flag and live migration of existing guest should work fine.
That sounds even nicer.
Thx.
--
Regards/Gruss,
Boris.
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--
^ permalink raw reply [flat|nested] 77+ messages in thread* Re: [Qemu-devel] [PATCH v8 05/28] target/i386: add memory encryption feature cpuid support
@ 2018-02-13 15:41 ` Borislav Petkov
0 siblings, 0 replies; 77+ messages in thread
From: Borislav Petkov @ 2018-02-13 15:41 UTC (permalink / raw)
To: Brijesh Singh
Cc: Brijesh Singh, Eduardo Habkost, Edgar E. Iglesias, Peter Maydell,
kvm, Michael S. Tsirkin, Marcel Apfelbaum, Markus Armbruster,
Peter Crosthwaite, Richard Henderson, qemu-devel,
Dr. David Alan Gilbert, Christian Borntraeger, Alexander Graf,
Stefan Hajnoczi, Cornelia Huck, Paolo Bonzini, Thomas Lendacky,
Alistair Francis, Bruce Rogers, Richard Henderson
On Tue, Feb 13, 2018 at 09:39:01AM -0600, Brijesh Singh wrote:
> Yes, I think we should be able to avoid creating new CPU model to
> handle this case. I am leaning towards dropping this patch and
> implement logic to populate the CPUID 0x8000_001F only when SEV is
> enabled. This should not require any changes in existing CPU model
> feature flag and live migration of existing guest should work fine.
That sounds even nicer.
Thx.
--
Regards/Gruss,
Boris.
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--
^ permalink raw reply [flat|nested] 77+ messages in thread
* Re: [Qemu-devel] [PATCH v8 05/28] target/i386: add memory encryption feature cpuid support
2018-02-13 15:39 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-13 15:45 ` Dr. David Alan Gilbert
-1 siblings, 0 replies; 77+ messages in thread
From: Dr. David Alan Gilbert @ 2018-02-13 15:45 UTC (permalink / raw)
To: Brijesh Singh
Cc: Borislav Petkov, Brijesh Singh, Eduardo Habkost,
Edgar E. Iglesias, Peter Maydell, kvm, Michael S. Tsirkin,
Marcel Apfelbaum, Markus Armbruster, Peter Crosthwaite,
Richard Henderson, qemu-devel, Christian Borntraeger,
Alexander Graf, Stefan Hajnoczi, Cornelia Huck, Paolo Bonzini,
Thomas Lendacky, Alistair Francis, Bruce
* Brijesh Singh (brijesh.ksingh@gmail.com) wrote:
> On Mon, Feb 12, 2018 at 3:19 PM, Borislav Petkov <bp@suse.de> wrote:
>
> > On Mon, Feb 12, 2018 at 03:07:26PM -0600, Brijesh Singh wrote:
> > > In current implementation, when -cpu ...,+sev is passed without
> > > appropriate SEV configuration then we populate the Fn8000_001F CPUID but
> > > VMCB will not have SEV bit set hence a guest will be launched as
> > > non-SEV.
> >
> > I think we should fail the guest init if sev is not really supported by
> > the host. Otherwise people might get mislead.
> >
> >
>
> Sure I will do that. We can simplify this patch if we don't fill the CPUID
> for non SEV guest. I am thinking of doing something like this:
>
> "If SEV configration is provided in QEMU command line then
> automatically increase xlevel to 0x8000_001F and populate the EAX and EBX
> registers"
>
>
>
> > > > Changing existing CPU models is possible only on very specific
> > > > circumstances (where VMs that are currently runnable would always
> > > > stay runnable), and would require compat_props entries to keep
> > > > compatibility on existing machine-types.
> > >
> > > Ah I didn't consider that case. What is recommendation, should we create
> > > a new CPU Model (EPYC-SEV) ?
> >
> > Can we please stop creating a new CPU model with every new CPUID feature
> > support added? This is just ridiculous.
> >
> > If this is about live migration, then by all means, fail the migration
> > if the feature bits are not compatible. But replicating CPU models and
> > then adding one new differing feature doesn't make any sense.
> >
> >
> Yes, I think we should be able to avoid creating new CPU model to handle
> this case.
> I am leaning towards dropping this patch and implement logic to populate the
> CPUID 0x8000_001F only when SEV is enabled. This should not require any
> changes
> in existing CPU model feature flag and live migration of existing guest
> should work fine.
Take care that a non-SEV guest works migrating from a SEV-enabled host
back to a non-SEV-enabled host. Similarly a guest that understands SEV
but you aren't going to enable it for this VM.
Dave
>
>
> > --
> > Regards/Gruss,
> > Boris.
> >
> > SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB
> > 21284 (AG Nürnberg)
> > --
> >
> >
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
^ permalink raw reply [flat|nested] 77+ messages in thread
* Re: [Qemu-devel] [PATCH v8 05/28] target/i386: add memory encryption feature cpuid support
@ 2018-02-13 15:45 ` Dr. David Alan Gilbert
0 siblings, 0 replies; 77+ messages in thread
From: Dr. David Alan Gilbert @ 2018-02-13 15:45 UTC (permalink / raw)
To: Brijesh Singh
Cc: Borislav Petkov, Brijesh Singh, Eduardo Habkost,
Edgar E. Iglesias, Peter Maydell, kvm, Michael S. Tsirkin,
Marcel Apfelbaum, Markus Armbruster, Peter Crosthwaite,
Richard Henderson, qemu-devel, Christian Borntraeger,
Alexander Graf, Stefan Hajnoczi, Cornelia Huck, Paolo Bonzini,
Thomas Lendacky, Alistair Francis, Bruce Rogers,
Richard Henderson
* Brijesh Singh (brijesh.ksingh@gmail.com) wrote:
> On Mon, Feb 12, 2018 at 3:19 PM, Borislav Petkov <bp@suse.de> wrote:
>
> > On Mon, Feb 12, 2018 at 03:07:26PM -0600, Brijesh Singh wrote:
> > > In current implementation, when -cpu ...,+sev is passed without
> > > appropriate SEV configuration then we populate the Fn8000_001F CPUID but
> > > VMCB will not have SEV bit set hence a guest will be launched as
> > > non-SEV.
> >
> > I think we should fail the guest init if sev is not really supported by
> > the host. Otherwise people might get mislead.
> >
> >
>
> Sure I will do that. We can simplify this patch if we don't fill the CPUID
> for non SEV guest. I am thinking of doing something like this:
>
> "If SEV configration is provided in QEMU command line then
> automatically increase xlevel to 0x8000_001F and populate the EAX and EBX
> registers"
>
>
>
> > > > Changing existing CPU models is possible only on very specific
> > > > circumstances (where VMs that are currently runnable would always
> > > > stay runnable), and would require compat_props entries to keep
> > > > compatibility on existing machine-types.
> > >
> > > Ah I didn't consider that case. What is recommendation, should we create
> > > a new CPU Model (EPYC-SEV) ?
> >
> > Can we please stop creating a new CPU model with every new CPUID feature
> > support added? This is just ridiculous.
> >
> > If this is about live migration, then by all means, fail the migration
> > if the feature bits are not compatible. But replicating CPU models and
> > then adding one new differing feature doesn't make any sense.
> >
> >
> Yes, I think we should be able to avoid creating new CPU model to handle
> this case.
> I am leaning towards dropping this patch and implement logic to populate the
> CPUID 0x8000_001F only when SEV is enabled. This should not require any
> changes
> in existing CPU model feature flag and live migration of existing guest
> should work fine.
Take care that a non-SEV guest works migrating from a SEV-enabled host
back to a non-SEV-enabled host. Similarly a guest that understands SEV
but you aren't going to enable it for this VM.
Dave
>
>
> > --
> > Regards/Gruss,
> > Boris.
> >
> > SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB
> > 21284 (AG Nürnberg)
> > --
> >
> >
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
^ permalink raw reply [flat|nested] 77+ messages in thread
* [PATCH v8 06/28] machine: add -memory-encryption property
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:36 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
When CPU supports memory encryption feature, the property can be used to
specify the encryption object to use when launching an encrypted guest.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Marcel Apfelbaum <marcel@redhat.com>
Cc: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
hw/core/machine.c | 22 ++++++++++++++++++++++
include/hw/boards.h | 1 +
qemu-options.hx | 2 ++
3 files changed, 25 insertions(+)
diff --git a/hw/core/machine.c b/hw/core/machine.c
index cdc1163dc6fb..e9940e58ad65 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -334,6 +334,22 @@ static bool machine_get_enforce_config_section(Object *obj, Error **errp)
return ms->enforce_config_section;
}
+static char *machine_get_memory_encryption(Object *obj, Error **errp)
+{
+ MachineState *ms = MACHINE(obj);
+
+ return g_strdup(ms->memory_encryption);
+}
+
+static void machine_set_memory_encryption(Object *obj, const char *value,
+ Error **errp)
+{
+ MachineState *ms = MACHINE(obj);
+
+ g_free(ms->memory_encryption);
+ ms->memory_encryption = g_strdup(value);
+}
+
void machine_class_allow_dynamic_sysbus_dev(MachineClass *mc, const char *type)
{
strList *item = g_new0(strList, 1);
@@ -612,6 +628,12 @@ static void machine_class_init(ObjectClass *oc, void *data)
&error_abort);
object_class_property_set_description(oc, "enforce-config-section",
"Set on to enforce configuration section migration", &error_abort);
+
+ object_class_property_add_str(oc, "memory-encryption",
+ machine_get_memory_encryption, machine_set_memory_encryption,
+ &error_abort);
+ object_class_property_set_description(oc, "memory-encryption",
+ "Set memory encyption object to use", &error_abort);
}
static void machine_class_base_init(ObjectClass *oc, void *data)
diff --git a/include/hw/boards.h b/include/hw/boards.h
index efb0a9edfdf1..8ce9a7a21d3d 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -243,6 +243,7 @@ struct MachineState {
bool suppress_vmdesc;
bool enforce_config_section;
bool enable_graphics;
+ char *memory_encryption;
ram_addr_t ram_size;
ram_addr_t maxram_size;
diff --git a/qemu-options.hx b/qemu-options.hx
index d15c1713d182..e70c92db2323 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -110,6 +110,8 @@ code to send configuration section even if the machine-type sets the
@option{migration.send-configuration} property to @var{off}.
NOTE: this parameter is deprecated. Please use @option{-global}
@option{migration.send-configuration}=@var{on|off} instead.
+@item memory-encryption=@var{}
+Memory encryption object to use. The default is none.
@end table
ETEXI
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 06/28] machine: add -memory-encryption property
@ 2018-02-12 15:36 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh
When CPU supports memory encryption feature, the property can be used to
specify the encryption object to use when launching an encrypted guest.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Marcel Apfelbaum <marcel@redhat.com>
Cc: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
hw/core/machine.c | 22 ++++++++++++++++++++++
include/hw/boards.h | 1 +
qemu-options.hx | 2 ++
3 files changed, 25 insertions(+)
diff --git a/hw/core/machine.c b/hw/core/machine.c
index cdc1163dc6fb..e9940e58ad65 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -334,6 +334,22 @@ static bool machine_get_enforce_config_section(Object *obj, Error **errp)
return ms->enforce_config_section;
}
+static char *machine_get_memory_encryption(Object *obj, Error **errp)
+{
+ MachineState *ms = MACHINE(obj);
+
+ return g_strdup(ms->memory_encryption);
+}
+
+static void machine_set_memory_encryption(Object *obj, const char *value,
+ Error **errp)
+{
+ MachineState *ms = MACHINE(obj);
+
+ g_free(ms->memory_encryption);
+ ms->memory_encryption = g_strdup(value);
+}
+
void machine_class_allow_dynamic_sysbus_dev(MachineClass *mc, const char *type)
{
strList *item = g_new0(strList, 1);
@@ -612,6 +628,12 @@ static void machine_class_init(ObjectClass *oc, void *data)
&error_abort);
object_class_property_set_description(oc, "enforce-config-section",
"Set on to enforce configuration section migration", &error_abort);
+
+ object_class_property_add_str(oc, "memory-encryption",
+ machine_get_memory_encryption, machine_set_memory_encryption,
+ &error_abort);
+ object_class_property_set_description(oc, "memory-encryption",
+ "Set memory encyption object to use", &error_abort);
}
static void machine_class_base_init(ObjectClass *oc, void *data)
diff --git a/include/hw/boards.h b/include/hw/boards.h
index efb0a9edfdf1..8ce9a7a21d3d 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -243,6 +243,7 @@ struct MachineState {
bool suppress_vmdesc;
bool enforce_config_section;
bool enable_graphics;
+ char *memory_encryption;
ram_addr_t ram_size;
ram_addr_t maxram_size;
diff --git a/qemu-options.hx b/qemu-options.hx
index d15c1713d182..e70c92db2323 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -110,6 +110,8 @@ code to send configuration section even if the machine-type sets the
@option{migration.send-configuration} property to @var{off}.
NOTE: this parameter is deprecated. Please use @option{-global}
@option{migration.send-configuration}=@var{on|off} instead.
+@item memory-encryption=@var{}
+Memory encryption object to use. The default is none.
@end table
ETEXI
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread
* [PATCH v8 07/28] kvm: update kvm.h to include memory encryption ioctls
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:36 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
Updates kmv.h to include memory encryption ioctls and SEV commands.
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
| 90 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 90 insertions(+)
--git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
index d92c9b2f0ed2..aed22309950d 100644
--- a/linux-headers/linux/kvm.h
+++ b/linux-headers/linux/kvm.h
@@ -1362,6 +1362,96 @@ struct kvm_s390_ucas_mapping {
/* Available with KVM_CAP_S390_CMMA_MIGRATION */
#define KVM_S390_GET_CMMA_BITS _IOWR(KVMIO, 0xb8, struct kvm_s390_cmma_log)
#define KVM_S390_SET_CMMA_BITS _IOW(KVMIO, 0xb9, struct kvm_s390_cmma_log)
+/* Memory Encryption Commands */
+#define KVM_MEMORY_ENCRYPT_OP _IOWR(KVMIO, 0xba, unsigned long)
+
+struct kvm_enc_region {
+ __u64 addr;
+ __u64 size;
+};
+
+#define KVM_MEMORY_ENCRYPT_REG_REGION _IOR(KVMIO, 0xbb, struct kvm_enc_region)
+#define KVM_MEMORY_ENCRYPT_UNREG_REGION _IOR(KVMIO, 0xbc, struct kvm_enc_region)
+
+/* Secure Encrypted Virtualization command */
+enum sev_cmd_id {
+ /* Guest initialization commands */
+ KVM_SEV_INIT = 0,
+ KVM_SEV_ES_INIT,
+ /* Guest launch commands */
+ KVM_SEV_LAUNCH_START,
+ KVM_SEV_LAUNCH_UPDATE_DATA,
+ KVM_SEV_LAUNCH_UPDATE_VMSA,
+ KVM_SEV_LAUNCH_SECRET,
+ KVM_SEV_LAUNCH_MEASURE,
+ KVM_SEV_LAUNCH_FINISH,
+ /* Guest migration commands (outgoing) */
+ KVM_SEV_SEND_START,
+ KVM_SEV_SEND_UPDATE_DATA,
+ KVM_SEV_SEND_UPDATE_VMSA,
+ KVM_SEV_SEND_FINISH,
+ /* Guest migration commands (incoming) */
+ KVM_SEV_RECEIVE_START,
+ KVM_SEV_RECEIVE_UPDATE_DATA,
+ KVM_SEV_RECEIVE_UPDATE_VMSA,
+ KVM_SEV_RECEIVE_FINISH,
+ /* Guest status and debug commands */
+ KVM_SEV_GUEST_STATUS,
+ KVM_SEV_DBG_DECRYPT,
+ KVM_SEV_DBG_ENCRYPT,
+ /* Guest certificates commands */
+ KVM_SEV_CERT_EXPORT,
+
+ KVM_SEV_NR_MAX,
+};
+
+struct kvm_sev_cmd {
+ __u32 id;
+ __u64 data;
+ __u32 error;
+ __u32 sev_fd;
+};
+
+struct kvm_sev_launch_start {
+ __u32 handle;
+ __u32 policy;
+ __u64 dh_uaddr;
+ __u32 dh_len;
+ __u64 session_uaddr;
+ __u32 session_len;
+};
+
+struct kvm_sev_launch_update_data {
+ __u64 uaddr;
+ __u32 len;
+};
+
+
+struct kvm_sev_launch_secret {
+ __u64 hdr_uaddr;
+ __u32 hdr_len;
+ __u64 guest_uaddr;
+ __u32 guest_len;
+ __u64 trans_uaddr;
+ __u32 trans_len;
+};
+
+struct kvm_sev_launch_measure {
+ __u64 uaddr;
+ __u32 len;
+};
+
+struct kvm_sev_guest_status {
+ __u32 handle;
+ __u32 policy;
+ __u32 state;
+};
+
+struct kvm_sev_dbg {
+ __u64 src_uaddr;
+ __u64 dst_uaddr;
+ __u32 len;
+};
#define KVM_DEV_ASSIGN_ENABLE_IOMMU (1 << 0)
#define KVM_DEV_ASSIGN_PCI_2_3 (1 << 1)
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 07/28] kvm: update kvm.h to include memory encryption ioctls
@ 2018-02-12 15:36 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh
Updates kmv.h to include memory encryption ioctls and SEV commands.
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
| 90 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 90 insertions(+)
--git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
index d92c9b2f0ed2..aed22309950d 100644
--- a/linux-headers/linux/kvm.h
+++ b/linux-headers/linux/kvm.h
@@ -1362,6 +1362,96 @@ struct kvm_s390_ucas_mapping {
/* Available with KVM_CAP_S390_CMMA_MIGRATION */
#define KVM_S390_GET_CMMA_BITS _IOWR(KVMIO, 0xb8, struct kvm_s390_cmma_log)
#define KVM_S390_SET_CMMA_BITS _IOW(KVMIO, 0xb9, struct kvm_s390_cmma_log)
+/* Memory Encryption Commands */
+#define KVM_MEMORY_ENCRYPT_OP _IOWR(KVMIO, 0xba, unsigned long)
+
+struct kvm_enc_region {
+ __u64 addr;
+ __u64 size;
+};
+
+#define KVM_MEMORY_ENCRYPT_REG_REGION _IOR(KVMIO, 0xbb, struct kvm_enc_region)
+#define KVM_MEMORY_ENCRYPT_UNREG_REGION _IOR(KVMIO, 0xbc, struct kvm_enc_region)
+
+/* Secure Encrypted Virtualization command */
+enum sev_cmd_id {
+ /* Guest initialization commands */
+ KVM_SEV_INIT = 0,
+ KVM_SEV_ES_INIT,
+ /* Guest launch commands */
+ KVM_SEV_LAUNCH_START,
+ KVM_SEV_LAUNCH_UPDATE_DATA,
+ KVM_SEV_LAUNCH_UPDATE_VMSA,
+ KVM_SEV_LAUNCH_SECRET,
+ KVM_SEV_LAUNCH_MEASURE,
+ KVM_SEV_LAUNCH_FINISH,
+ /* Guest migration commands (outgoing) */
+ KVM_SEV_SEND_START,
+ KVM_SEV_SEND_UPDATE_DATA,
+ KVM_SEV_SEND_UPDATE_VMSA,
+ KVM_SEV_SEND_FINISH,
+ /* Guest migration commands (incoming) */
+ KVM_SEV_RECEIVE_START,
+ KVM_SEV_RECEIVE_UPDATE_DATA,
+ KVM_SEV_RECEIVE_UPDATE_VMSA,
+ KVM_SEV_RECEIVE_FINISH,
+ /* Guest status and debug commands */
+ KVM_SEV_GUEST_STATUS,
+ KVM_SEV_DBG_DECRYPT,
+ KVM_SEV_DBG_ENCRYPT,
+ /* Guest certificates commands */
+ KVM_SEV_CERT_EXPORT,
+
+ KVM_SEV_NR_MAX,
+};
+
+struct kvm_sev_cmd {
+ __u32 id;
+ __u64 data;
+ __u32 error;
+ __u32 sev_fd;
+};
+
+struct kvm_sev_launch_start {
+ __u32 handle;
+ __u32 policy;
+ __u64 dh_uaddr;
+ __u32 dh_len;
+ __u64 session_uaddr;
+ __u32 session_len;
+};
+
+struct kvm_sev_launch_update_data {
+ __u64 uaddr;
+ __u32 len;
+};
+
+
+struct kvm_sev_launch_secret {
+ __u64 hdr_uaddr;
+ __u32 hdr_len;
+ __u64 guest_uaddr;
+ __u32 guest_len;
+ __u64 trans_uaddr;
+ __u32 trans_len;
+};
+
+struct kvm_sev_launch_measure {
+ __u64 uaddr;
+ __u32 len;
+};
+
+struct kvm_sev_guest_status {
+ __u32 handle;
+ __u32 policy;
+ __u32 state;
+};
+
+struct kvm_sev_dbg {
+ __u64 src_uaddr;
+ __u64 dst_uaddr;
+ __u32 len;
+};
#define KVM_DEV_ASSIGN_ENABLE_IOMMU (1 << 0)
#define KVM_DEV_ASSIGN_PCI_2_3 (1 << 1)
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread
* [PATCH v8 08/28] docs: add AMD Secure Encrypted Virtualization (SEV)
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:36 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
Create a documentation entry to describe the AMD Secure Encrypted
Virtualization (SEV) feature.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
docs/amd-memory-encryption.txt | 92 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 92 insertions(+)
create mode 100644 docs/amd-memory-encryption.txt
diff --git a/docs/amd-memory-encryption.txt b/docs/amd-memory-encryption.txt
new file mode 100644
index 000000000000..72a92b6c6353
--- /dev/null
+++ b/docs/amd-memory-encryption.txt
@@ -0,0 +1,92 @@
+Secure Encrypted Virtualization (SEV) is a feature found on AMD processors.
+
+SEV is an extension to the AMD-V architecture which supports running encrypted
+virtual machine (VMs) under the control of KVM. Encrypted VMs have their pages
+(code and data) secured such that only the guest itself has access to the
+unencrypted version. Each encrypted VM is associated with a unique encryption
+key; if its data is accessed to a different entity using a different key the
+encrypted guests data will be incorrectly decrypted, leading to unintelligible
+data.
+
+The key management of this feature is handled by separate processor known as
+AMD secure processor (AMD-SP) which is present in AMD SOCs. Firmware running
+inside the AMD-SP provide commands to support common VM lifecycle. This
+includes commands for launching, snapshotting, migrating and debugging the
+encrypted guest. Those SEV command can be issued via KVM_MEMORY_ENCRYPT_OP
+ioctls.
+
+Launching
+---------
+Boot images (such as bios) must be encrypted before guest can be booted.
+MEMORY_ENCRYPT_OP ioctl provides commands to encrypt the images :LAUNCH_START,
+LAUNCH_UPDATE_DATA, LAUNCH_MEASURE and LAUNCH_FINISH. These four commands
+together generate a fresh memory encryption key for the VM, encrypt the boot
+images and provide a measurement than can be used as an attestation of the
+successful launch.
+
+LAUNCH_START is called first to create a cryptographic launch context within
+the firmware. To create this context, guest owner must provides guest policy,
+its public Diffie-Hellman key (PDH) and session parameters. These inputs
+should be treated as binary blob and must be passed as-is to the SEV firmware.
+
+The guest policy is passed as plaintext and hypervisor may able to read it
+but should not modify it (any modification of the policy bits will result
+in bad measurement). The guest policy is a 4-byte data structure containing
+several flags that restricts what can be done on running SEV guest.
+See KM Spec section 3 and 6.2 for more details.
+
+Guest owners provided DH certificate and session parameters will be used to
+establish a cryptographic session with the guest owner to negotiate keys used
+for the attestation.
+
+LAUNCH_UPDATE_DATA encrypts the memory region using the cryptographic context
+created via LAUNCH_START command. If required, this command can be called
+multiple times to encrypt different memory regions. The command also calculates
+the measurement of the memory contents as it encrypts.
+
+LAUNCH_MEASURE command can be used to retrieve the measurement of encrypted
+memory. This measurement is a signature of the memory contents that can be
+sent to the guest owner as an attestation that the memory was encrypted
+correctly by the firmware. The guest owner may wait to provide the guest
+confidential information until it can verify the attestation measurement.
+Since the guest owner knows the initial contents of the guest at boot, the
+attestation measurement can be verified by comparing it to what the guest owner
+expects.
+
+LAUNCH_FINISH command finalizes the guest launch and destroy's the cryptographic
+context.
+
+See SEV KM API Spec [1] 'Launching a guest' usage flow (Appendix A) for the
+complete flow chart.
+
+Debugging
+-----------
+Since memory contents of SEV guest is encrypted hence hypervisor access to the
+guest memory will get a cipher text. If guest policy allows debugging, then
+hypervisor can use DEBUG_DECRYPT and DEBUG_ENCRYPT commands access the guest
+memory region for debug purposes.
+
+Snapshot/Restore
+-----------------
+TODO
+
+Live Migration
+----------------
+TODO
+
+References
+-----------------
+
+AMD Memory Encryption whitepaper:
+http://amd-dev.wpengine.netdna-cdn.com/wordpress/media/2013/12/AMD_Memory_Encryption_Whitepaper_v7-Public.pdf
+
+Secure Encrypted Virutualization Key Management:
+[1] http://support.amd.com/TechDocs/55766_SEV-KM API_Specification.pdf
+
+KVM Forum slides:
+http://www.linux-kvm.org/images/7/74/02x08A-Thomas_Lendacky-AMDs_Virtualizatoin_Memory_Encryption_Technology.pdf
+
+AMD64 Architecture Programmer's Manual:
+ http://support.amd.com/TechDocs/24593.pdf
+ SME is section 7.10
+ SEV is section 15.34
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread
* [Qemu-devel] [PATCH v8 08/28] docs: add AMD Secure Encrypted Virtualization (SEV)
@ 2018-02-12 15:36 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh
Create a documentation entry to describe the AMD Secure Encrypted
Virtualization (SEV) feature.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
docs/amd-memory-encryption.txt | 92 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 92 insertions(+)
create mode 100644 docs/amd-memory-encryption.txt
diff --git a/docs/amd-memory-encryption.txt b/docs/amd-memory-encryption.txt
new file mode 100644
index 000000000000..72a92b6c6353
--- /dev/null
+++ b/docs/amd-memory-encryption.txt
@@ -0,0 +1,92 @@
+Secure Encrypted Virtualization (SEV) is a feature found on AMD processors.
+
+SEV is an extension to the AMD-V architecture which supports running encrypted
+virtual machine (VMs) under the control of KVM. Encrypted VMs have their pages
+(code and data) secured such that only the guest itself has access to the
+unencrypted version. Each encrypted VM is associated with a unique encryption
+key; if its data is accessed to a different entity using a different key the
+encrypted guests data will be incorrectly decrypted, leading to unintelligible
+data.
+
+The key management of this feature is handled by separate processor known as
+AMD secure processor (AMD-SP) which is present in AMD SOCs. Firmware running
+inside the AMD-SP provide commands to support common VM lifecycle. This
+includes commands for launching, snapshotting, migrating and debugging the
+encrypted guest. Those SEV command can be issued via KVM_MEMORY_ENCRYPT_OP
+ioctls.
+
+Launching
+---------
+Boot images (such as bios) must be encrypted before guest can be booted.
+MEMORY_ENCRYPT_OP ioctl provides commands to encrypt the images :LAUNCH_START,
+LAUNCH_UPDATE_DATA, LAUNCH_MEASURE and LAUNCH_FINISH. These four commands
+together generate a fresh memory encryption key for the VM, encrypt the boot
+images and provide a measurement than can be used as an attestation of the
+successful launch.
+
+LAUNCH_START is called first to create a cryptographic launch context within
+the firmware. To create this context, guest owner must provides guest policy,
+its public Diffie-Hellman key (PDH) and session parameters. These inputs
+should be treated as binary blob and must be passed as-is to the SEV firmware.
+
+The guest policy is passed as plaintext and hypervisor may able to read it
+but should not modify it (any modification of the policy bits will result
+in bad measurement). The guest policy is a 4-byte data structure containing
+several flags that restricts what can be done on running SEV guest.
+See KM Spec section 3 and 6.2 for more details.
+
+Guest owners provided DH certificate and session parameters will be used to
+establish a cryptographic session with the guest owner to negotiate keys used
+for the attestation.
+
+LAUNCH_UPDATE_DATA encrypts the memory region using the cryptographic context
+created via LAUNCH_START command. If required, this command can be called
+multiple times to encrypt different memory regions. The command also calculates
+the measurement of the memory contents as it encrypts.
+
+LAUNCH_MEASURE command can be used to retrieve the measurement of encrypted
+memory. This measurement is a signature of the memory contents that can be
+sent to the guest owner as an attestation that the memory was encrypted
+correctly by the firmware. The guest owner may wait to provide the guest
+confidential information until it can verify the attestation measurement.
+Since the guest owner knows the initial contents of the guest at boot, the
+attestation measurement can be verified by comparing it to what the guest owner
+expects.
+
+LAUNCH_FINISH command finalizes the guest launch and destroy's the cryptographic
+context.
+
+See SEV KM API Spec [1] 'Launching a guest' usage flow (Appendix A) for the
+complete flow chart.
+
+Debugging
+-----------
+Since memory contents of SEV guest is encrypted hence hypervisor access to the
+guest memory will get a cipher text. If guest policy allows debugging, then
+hypervisor can use DEBUG_DECRYPT and DEBUG_ENCRYPT commands access the guest
+memory region for debug purposes.
+
+Snapshot/Restore
+-----------------
+TODO
+
+Live Migration
+----------------
+TODO
+
+References
+-----------------
+
+AMD Memory Encryption whitepaper:
+http://amd-dev.wpengine.netdna-cdn.com/wordpress/media/2013/12/AMD_Memory_Encryption_Whitepaper_v7-Public.pdf
+
+Secure Encrypted Virutualization Key Management:
+[1] http://support.amd.com/TechDocs/55766_SEV-KM API_Specification.pdf
+
+KVM Forum slides:
+http://www.linux-kvm.org/images/7/74/02x08A-Thomas_Lendacky-AMDs_Virtualizatoin_Memory_Encryption_Technology.pdf
+
+AMD64 Architecture Programmer's Manual:
+ http://support.amd.com/TechDocs/24593.pdf
+ SME is section 7.10
+ SEV is section 15.34
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread
* [PATCH v8 09/28] target/i386: add Secure Encrypted Virtulization (SEV) object
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:36 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
Add a new memory encryption object 'sev-guest'. The object will be used
to create enrypted VMs on AMD EPYC CPU. The object provides the properties
to pass guest owner's public Diffie-hellman key, guest policy and session
information required to create the memory encryption context within the
SEV firmware.
e.g to launch SEV guest
# $QEMU \
-object sev-guest,id=sev0 \
-machine ....,memory-encryption=sev0
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
docs/amd-memory-encryption.txt | 17 ++++
include/sysemu/sev.h | 54 +++++++++++
qemu-options.hx | 36 +++++++
target/i386/Makefile.objs | 2 +-
target/i386/sev.c | 214 +++++++++++++++++++++++++++++++++++++++++
5 files changed, 322 insertions(+), 1 deletion(-)
create mode 100644 include/sysemu/sev.h
create mode 100644 target/i386/sev.c
diff --git a/docs/amd-memory-encryption.txt b/docs/amd-memory-encryption.txt
index 72a92b6c6353..1527f603ea2a 100644
--- a/docs/amd-memory-encryption.txt
+++ b/docs/amd-memory-encryption.txt
@@ -35,10 +35,21 @@ in bad measurement). The guest policy is a 4-byte data structure containing
several flags that restricts what can be done on running SEV guest.
See KM Spec section 3 and 6.2 for more details.
+The guest policy can be provided via the 'policy' property (see below)
+
+# ${QEMU} \
+ sev-guest,id=sev0,policy=0x1...\
+
Guest owners provided DH certificate and session parameters will be used to
establish a cryptographic session with the guest owner to negotiate keys used
for the attestation.
+The DH certificate and session blob can be provided via 'dh-cert-file' and
+'session-file' property (see below
+
+# ${QEMU} \
+ sev-guest,id=sev0,dh-cert-file=<file1>,session-file=<file2>
+
LAUNCH_UPDATE_DATA encrypts the memory region using the cryptographic context
created via LAUNCH_START command. If required, this command can be called
multiple times to encrypt different memory regions. The command also calculates
@@ -59,6 +70,12 @@ context.
See SEV KM API Spec [1] 'Launching a guest' usage flow (Appendix A) for the
complete flow chart.
+To launch a SEV guest
+
+# ${QEMU} \
+ -machine ...,memory-encryption=sev0 \
+ -object sev-guest,id=sev0
+
Debugging
-----------
Since memory contents of SEV guest is encrypted hence hypervisor access to the
diff --git a/include/sysemu/sev.h b/include/sysemu/sev.h
new file mode 100644
index 000000000000..eed679653dbc
--- /dev/null
+++ b/include/sysemu/sev.h
@@ -0,0 +1,54 @@
+/*
+ * QEMU Secure Encrypted Virutualization (SEV) support
+ *
+ * Copyright: Advanced Micro Devices, 2016-2018
+ *
+ * Authors:
+ * Brijesh Singh <brijesh.singh@amd.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef QEMU_SEV_H
+#define QEMU_SEV_H
+
+#include "qom/object.h"
+#include "qapi/error.h"
+#include "sysemu/kvm.h"
+#include "qemu/error-report.h"
+
+#define TYPE_QSEV_GUEST_INFO "sev-guest"
+#define QSEV_GUEST_INFO(obj) \
+ OBJECT_CHECK(QSevGuestInfo, (obj), TYPE_QSEV_GUEST_INFO)
+
+typedef struct QSevGuestInfo QSevGuestInfo;
+typedef struct QSevGuestInfoClass QSevGuestInfoClass;
+
+/**
+ * QSevGuestInfo:
+ *
+ * The QSevGuestInfo object is used for creating a SEV guest.
+ *
+ * # $QEMU \
+ * -object sev-guest,id=sev0 \
+ * -machine ...,memory-encryption=sev0
+ */
+struct QSevGuestInfo {
+ Object parent_obj;
+
+ char *sev_device;
+ uint32_t policy;
+ uint32_t handle;
+ char *dh_cert_file;
+ char *session_file;
+ uint32_t cbitpos;
+};
+
+struct QSevGuestInfoClass {
+ ObjectClass parent_class;
+};
+
+#endif
+
diff --git a/qemu-options.hx b/qemu-options.hx
index e70c92db2323..b7e03ed5e671 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -4304,6 +4304,42 @@ contents of @code{iv.b64} to the second secret
data=$SECRET,iv=$(<iv.b64)
@end example
+@item -object sev-guest,id=@var{id},sev-device=@var{string}[cbitpos=@var{cbitpos},policy=@var{policy},handle=@var{handle},dh-cert-file=@var{file},session-file=@var{file}]
+
+Create a Secure Encrypted Virtualization (SEV) guest object, which can be used
+to provide the guest memory encryption support on AMD processors.
+
+The @option{sev-device} provides the device file to use for communicating with
+the SEV firmware running inside AMD Secure Processor. The default device is
+'/dev/sev'. If hardware supports memory encryption then /dev/sev devices are
+created by CCP driver.
+
+The @option{cbitpos} provide the C-bit location in guest page table entry to use.
+
+The @option{policy} provides the guest policy to be enforced by the SEV firmware
+and restrict what configuration and operational commands can be performed on this
+guest by the hypervisor. The policy should be provided by the guest owner and is
+bound to the guest and cannot be changed throughout the lifetime of the guest.
+The default is 0.
+
+If guest @option{policy} allows sharing the key with another SEV guest then
+@option{handle} can be use to provide handle of the guest from which to share
+the key.
+
+The @option{dh-cert-file} and @option{session-file} provides the guest owner's
+Public Diffie-Hillman key defined in SEV spec. The PDH and session parameters
+are used for establishing a cryptographic session with the guest owner to
+negotiate keys used for attestation. The file must be encoded in base64.
+
+e.g to launch a SEV guest
+@example
+ # $QEMU \
+ ......
+ -object sev-guest,id=sev0 \
+ -machine ...,memory-encryption=sev0
+ .....
+
+@end example
@end table
ETEXI
diff --git a/target/i386/Makefile.objs b/target/i386/Makefile.objs
index f5c6ef20a7bb..76aeaeae2750 100644
--- a/target/i386/Makefile.objs
+++ b/target/i386/Makefile.objs
@@ -4,7 +4,7 @@ obj-$(CONFIG_TCG) += bpt_helper.o cc_helper.o excp_helper.o fpu_helper.o
obj-$(CONFIG_TCG) += int_helper.o mem_helper.o misc_helper.o mpx_helper.o
obj-$(CONFIG_TCG) += seg_helper.o smm_helper.o svm_helper.o
obj-$(CONFIG_SOFTMMU) += machine.o arch_memory_mapping.o arch_dump.o monitor.o
-obj-$(CONFIG_KVM) += kvm.o hyperv.o
+obj-$(CONFIG_KVM) += kvm.o hyperv.o sev.o
obj-$(call lnot,$(CONFIG_KVM)) += kvm-stub.o
# HAX support
ifdef CONFIG_WIN32
diff --git a/target/i386/sev.c b/target/i386/sev.c
new file mode 100644
index 000000000000..57e092a0bddd
--- /dev/null
+++ b/target/i386/sev.c
@@ -0,0 +1,214 @@
+/*
+ * QEMU SEV support
+ *
+ * Copyright Advanced Micro Devices 2016-2018
+ *
+ * Author:
+ * Brijesh Singh <brijesh.singh@amd.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "qom/object_interfaces.h"
+#include "qemu/base64.h"
+#include "sysemu/kvm.h"
+#include "sysemu/sev.h"
+#include "sysemu/sysemu.h"
+
+#define DEFAULT_GUEST_POLICY 0x1 /* disable debug */
+#define DEFAULT_SEV_DEVICE "/dev/sev"
+
+static void
+qsev_guest_finalize(Object *obj)
+{
+}
+
+static char *
+qsev_guest_get_session_file(Object *obj, Error **errp)
+{
+ QSevGuestInfo *s = QSEV_GUEST_INFO(obj);
+
+ return s->session_file ? g_strdup(s->session_file) : NULL;
+}
+
+static void
+qsev_guest_set_session_file(Object *obj, const char *value, Error **errp)
+{
+ QSevGuestInfo *s = QSEV_GUEST_INFO(obj);
+
+ s->session_file = g_strdup(value);
+}
+
+static char *
+qsev_guest_get_dh_cert_file(Object *obj, Error **errp)
+{
+ QSevGuestInfo *s = QSEV_GUEST_INFO(obj);
+
+ return g_strdup(s->dh_cert_file);
+}
+
+static void
+qsev_guest_set_dh_cert_file(Object *obj, const char *value, Error **errp)
+{
+ QSevGuestInfo *s = QSEV_GUEST_INFO(obj);
+
+ s->dh_cert_file = g_strdup(value);
+}
+
+static char *
+qsev_guest_get_sev_device(Object *obj, Error **errp)
+{
+ QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
+
+ return g_strdup(sev->sev_device);
+}
+
+static void
+qsev_guest_set_sev_device(Object *obj, const char *value, Error **errp)
+{
+ QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
+
+ sev->sev_device = g_strdup(value);
+}
+
+static void
+qsev_guest_class_init(ObjectClass *oc, void *data)
+{
+ object_class_property_add_str(oc, "sev-device",
+ qsev_guest_get_sev_device,
+ qsev_guest_set_sev_device,
+ NULL);
+ object_class_property_set_description(oc, "sev-device",
+ "SEV device to use", NULL);
+ object_class_property_add_str(oc, "dh-cert-file",
+ qsev_guest_get_dh_cert_file,
+ qsev_guest_set_dh_cert_file,
+ NULL);
+ object_class_property_set_description(oc, "dh-cert-file",
+ "guest owners DH certificate (encoded with base64)", NULL);
+ object_class_property_add_str(oc, "session-file",
+ qsev_guest_get_session_file,
+ qsev_guest_set_session_file,
+ NULL);
+ object_class_property_set_description(oc, "session-file",
+ "guest owners session parameters (encoded with base64)", NULL);
+}
+
+static void
+qsev_guest_set_handle(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
+ uint32_t value;
+
+ visit_type_uint32(v, name, &value, errp);
+ sev->handle = value;
+}
+
+static void
+qsev_guest_set_policy(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
+ uint32_t value;
+
+ visit_type_uint32(v, name, &value, errp);
+ sev->policy = value;
+}
+
+static void
+qsev_guest_set_cbitpos(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
+ uint32_t value;
+
+ visit_type_uint32(v, name, &value, errp);
+ sev->cbitpos = value;
+}
+
+static void
+qsev_guest_get_policy(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ uint32_t value;
+ QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
+
+ value = sev->policy;
+ visit_type_uint32(v, name, &value, errp);
+}
+
+static void
+qsev_guest_get_handle(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ uint32_t value;
+ QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
+
+ value = sev->handle;
+ visit_type_uint32(v, name, &value, errp);
+}
+
+static void
+qsev_guest_get_cbitpos(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ uint32_t value;
+ QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
+
+ value = sev->cbitpos;
+ visit_type_uint32(v, name, &value, errp);
+}
+
+static uint32_t
+sev_get_host_cbitpos(void)
+{
+ uint32_t ebx;
+
+ host_cpuid(0x8000001F, 0, NULL, &ebx, NULL, NULL);
+
+ return ebx & 0x3f;
+}
+
+static void
+qsev_guest_init(Object *obj)
+{
+ QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
+
+ sev->sev_device = g_strdup(DEFAULT_SEV_DEVICE);
+ sev->policy = DEFAULT_GUEST_POLICY;
+ sev->cbitpos = sev_get_host_cbitpos();
+ object_property_add(obj, "policy", "uint32", qsev_guest_get_policy,
+ qsev_guest_set_policy, NULL, NULL, NULL);
+ object_property_add(obj, "handle", "uint32", qsev_guest_get_handle,
+ qsev_guest_set_handle, NULL, NULL, NULL);
+ object_property_add(obj, "cbitpos", "uint32", qsev_guest_get_cbitpos,
+ qsev_guest_set_cbitpos, NULL, NULL, NULL);
+}
+
+/* sev guest info */
+static const TypeInfo qsev_guest_info = {
+ .parent = TYPE_OBJECT,
+ .name = TYPE_QSEV_GUEST_INFO,
+ .instance_size = sizeof(QSevGuestInfo),
+ .instance_finalize = qsev_guest_finalize,
+ .class_size = sizeof(QSevGuestInfoClass),
+ .class_init = qsev_guest_class_init,
+ .instance_init = qsev_guest_init,
+ .interfaces = (InterfaceInfo[]) {
+ { TYPE_USER_CREATABLE },
+ { }
+ }
+};
+
+static void
+sev_register_types(void)
+{
+ type_register_static(&qsev_guest_info);
+}
+
+type_init(sev_register_types);
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 09/28] target/i386: add Secure Encrypted Virtulization (SEV) object
@ 2018-02-12 15:36 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh, Richard Henderson
Add a new memory encryption object 'sev-guest'. The object will be used
to create enrypted VMs on AMD EPYC CPU. The object provides the properties
to pass guest owner's public Diffie-hellman key, guest policy and session
information required to create the memory encryption context within the
SEV firmware.
e.g to launch SEV guest
# $QEMU \
-object sev-guest,id=sev0 \
-machine ....,memory-encryption=sev0
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
docs/amd-memory-encryption.txt | 17 ++++
include/sysemu/sev.h | 54 +++++++++++
qemu-options.hx | 36 +++++++
target/i386/Makefile.objs | 2 +-
target/i386/sev.c | 214 +++++++++++++++++++++++++++++++++++++++++
5 files changed, 322 insertions(+), 1 deletion(-)
create mode 100644 include/sysemu/sev.h
create mode 100644 target/i386/sev.c
diff --git a/docs/amd-memory-encryption.txt b/docs/amd-memory-encryption.txt
index 72a92b6c6353..1527f603ea2a 100644
--- a/docs/amd-memory-encryption.txt
+++ b/docs/amd-memory-encryption.txt
@@ -35,10 +35,21 @@ in bad measurement). The guest policy is a 4-byte data structure containing
several flags that restricts what can be done on running SEV guest.
See KM Spec section 3 and 6.2 for more details.
+The guest policy can be provided via the 'policy' property (see below)
+
+# ${QEMU} \
+ sev-guest,id=sev0,policy=0x1...\
+
Guest owners provided DH certificate and session parameters will be used to
establish a cryptographic session with the guest owner to negotiate keys used
for the attestation.
+The DH certificate and session blob can be provided via 'dh-cert-file' and
+'session-file' property (see below
+
+# ${QEMU} \
+ sev-guest,id=sev0,dh-cert-file=<file1>,session-file=<file2>
+
LAUNCH_UPDATE_DATA encrypts the memory region using the cryptographic context
created via LAUNCH_START command. If required, this command can be called
multiple times to encrypt different memory regions. The command also calculates
@@ -59,6 +70,12 @@ context.
See SEV KM API Spec [1] 'Launching a guest' usage flow (Appendix A) for the
complete flow chart.
+To launch a SEV guest
+
+# ${QEMU} \
+ -machine ...,memory-encryption=sev0 \
+ -object sev-guest,id=sev0
+
Debugging
-----------
Since memory contents of SEV guest is encrypted hence hypervisor access to the
diff --git a/include/sysemu/sev.h b/include/sysemu/sev.h
new file mode 100644
index 000000000000..eed679653dbc
--- /dev/null
+++ b/include/sysemu/sev.h
@@ -0,0 +1,54 @@
+/*
+ * QEMU Secure Encrypted Virutualization (SEV) support
+ *
+ * Copyright: Advanced Micro Devices, 2016-2018
+ *
+ * Authors:
+ * Brijesh Singh <brijesh.singh@amd.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef QEMU_SEV_H
+#define QEMU_SEV_H
+
+#include "qom/object.h"
+#include "qapi/error.h"
+#include "sysemu/kvm.h"
+#include "qemu/error-report.h"
+
+#define TYPE_QSEV_GUEST_INFO "sev-guest"
+#define QSEV_GUEST_INFO(obj) \
+ OBJECT_CHECK(QSevGuestInfo, (obj), TYPE_QSEV_GUEST_INFO)
+
+typedef struct QSevGuestInfo QSevGuestInfo;
+typedef struct QSevGuestInfoClass QSevGuestInfoClass;
+
+/**
+ * QSevGuestInfo:
+ *
+ * The QSevGuestInfo object is used for creating a SEV guest.
+ *
+ * # $QEMU \
+ * -object sev-guest,id=sev0 \
+ * -machine ...,memory-encryption=sev0
+ */
+struct QSevGuestInfo {
+ Object parent_obj;
+
+ char *sev_device;
+ uint32_t policy;
+ uint32_t handle;
+ char *dh_cert_file;
+ char *session_file;
+ uint32_t cbitpos;
+};
+
+struct QSevGuestInfoClass {
+ ObjectClass parent_class;
+};
+
+#endif
+
diff --git a/qemu-options.hx b/qemu-options.hx
index e70c92db2323..b7e03ed5e671 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -4304,6 +4304,42 @@ contents of @code{iv.b64} to the second secret
data=$SECRET,iv=$(<iv.b64)
@end example
+@item -object sev-guest,id=@var{id},sev-device=@var{string}[cbitpos=@var{cbitpos},policy=@var{policy},handle=@var{handle},dh-cert-file=@var{file},session-file=@var{file}]
+
+Create a Secure Encrypted Virtualization (SEV) guest object, which can be used
+to provide the guest memory encryption support on AMD processors.
+
+The @option{sev-device} provides the device file to use for communicating with
+the SEV firmware running inside AMD Secure Processor. The default device is
+'/dev/sev'. If hardware supports memory encryption then /dev/sev devices are
+created by CCP driver.
+
+The @option{cbitpos} provide the C-bit location in guest page table entry to use.
+
+The @option{policy} provides the guest policy to be enforced by the SEV firmware
+and restrict what configuration and operational commands can be performed on this
+guest by the hypervisor. The policy should be provided by the guest owner and is
+bound to the guest and cannot be changed throughout the lifetime of the guest.
+The default is 0.
+
+If guest @option{policy} allows sharing the key with another SEV guest then
+@option{handle} can be use to provide handle of the guest from which to share
+the key.
+
+The @option{dh-cert-file} and @option{session-file} provides the guest owner's
+Public Diffie-Hillman key defined in SEV spec. The PDH and session parameters
+are used for establishing a cryptographic session with the guest owner to
+negotiate keys used for attestation. The file must be encoded in base64.
+
+e.g to launch a SEV guest
+@example
+ # $QEMU \
+ ......
+ -object sev-guest,id=sev0 \
+ -machine ...,memory-encryption=sev0
+ .....
+
+@end example
@end table
ETEXI
diff --git a/target/i386/Makefile.objs b/target/i386/Makefile.objs
index f5c6ef20a7bb..76aeaeae2750 100644
--- a/target/i386/Makefile.objs
+++ b/target/i386/Makefile.objs
@@ -4,7 +4,7 @@ obj-$(CONFIG_TCG) += bpt_helper.o cc_helper.o excp_helper.o fpu_helper.o
obj-$(CONFIG_TCG) += int_helper.o mem_helper.o misc_helper.o mpx_helper.o
obj-$(CONFIG_TCG) += seg_helper.o smm_helper.o svm_helper.o
obj-$(CONFIG_SOFTMMU) += machine.o arch_memory_mapping.o arch_dump.o monitor.o
-obj-$(CONFIG_KVM) += kvm.o hyperv.o
+obj-$(CONFIG_KVM) += kvm.o hyperv.o sev.o
obj-$(call lnot,$(CONFIG_KVM)) += kvm-stub.o
# HAX support
ifdef CONFIG_WIN32
diff --git a/target/i386/sev.c b/target/i386/sev.c
new file mode 100644
index 000000000000..57e092a0bddd
--- /dev/null
+++ b/target/i386/sev.c
@@ -0,0 +1,214 @@
+/*
+ * QEMU SEV support
+ *
+ * Copyright Advanced Micro Devices 2016-2018
+ *
+ * Author:
+ * Brijesh Singh <brijesh.singh@amd.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "qom/object_interfaces.h"
+#include "qemu/base64.h"
+#include "sysemu/kvm.h"
+#include "sysemu/sev.h"
+#include "sysemu/sysemu.h"
+
+#define DEFAULT_GUEST_POLICY 0x1 /* disable debug */
+#define DEFAULT_SEV_DEVICE "/dev/sev"
+
+static void
+qsev_guest_finalize(Object *obj)
+{
+}
+
+static char *
+qsev_guest_get_session_file(Object *obj, Error **errp)
+{
+ QSevGuestInfo *s = QSEV_GUEST_INFO(obj);
+
+ return s->session_file ? g_strdup(s->session_file) : NULL;
+}
+
+static void
+qsev_guest_set_session_file(Object *obj, const char *value, Error **errp)
+{
+ QSevGuestInfo *s = QSEV_GUEST_INFO(obj);
+
+ s->session_file = g_strdup(value);
+}
+
+static char *
+qsev_guest_get_dh_cert_file(Object *obj, Error **errp)
+{
+ QSevGuestInfo *s = QSEV_GUEST_INFO(obj);
+
+ return g_strdup(s->dh_cert_file);
+}
+
+static void
+qsev_guest_set_dh_cert_file(Object *obj, const char *value, Error **errp)
+{
+ QSevGuestInfo *s = QSEV_GUEST_INFO(obj);
+
+ s->dh_cert_file = g_strdup(value);
+}
+
+static char *
+qsev_guest_get_sev_device(Object *obj, Error **errp)
+{
+ QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
+
+ return g_strdup(sev->sev_device);
+}
+
+static void
+qsev_guest_set_sev_device(Object *obj, const char *value, Error **errp)
+{
+ QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
+
+ sev->sev_device = g_strdup(value);
+}
+
+static void
+qsev_guest_class_init(ObjectClass *oc, void *data)
+{
+ object_class_property_add_str(oc, "sev-device",
+ qsev_guest_get_sev_device,
+ qsev_guest_set_sev_device,
+ NULL);
+ object_class_property_set_description(oc, "sev-device",
+ "SEV device to use", NULL);
+ object_class_property_add_str(oc, "dh-cert-file",
+ qsev_guest_get_dh_cert_file,
+ qsev_guest_set_dh_cert_file,
+ NULL);
+ object_class_property_set_description(oc, "dh-cert-file",
+ "guest owners DH certificate (encoded with base64)", NULL);
+ object_class_property_add_str(oc, "session-file",
+ qsev_guest_get_session_file,
+ qsev_guest_set_session_file,
+ NULL);
+ object_class_property_set_description(oc, "session-file",
+ "guest owners session parameters (encoded with base64)", NULL);
+}
+
+static void
+qsev_guest_set_handle(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
+ uint32_t value;
+
+ visit_type_uint32(v, name, &value, errp);
+ sev->handle = value;
+}
+
+static void
+qsev_guest_set_policy(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
+ uint32_t value;
+
+ visit_type_uint32(v, name, &value, errp);
+ sev->policy = value;
+}
+
+static void
+qsev_guest_set_cbitpos(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
+ uint32_t value;
+
+ visit_type_uint32(v, name, &value, errp);
+ sev->cbitpos = value;
+}
+
+static void
+qsev_guest_get_policy(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ uint32_t value;
+ QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
+
+ value = sev->policy;
+ visit_type_uint32(v, name, &value, errp);
+}
+
+static void
+qsev_guest_get_handle(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ uint32_t value;
+ QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
+
+ value = sev->handle;
+ visit_type_uint32(v, name, &value, errp);
+}
+
+static void
+qsev_guest_get_cbitpos(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ uint32_t value;
+ QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
+
+ value = sev->cbitpos;
+ visit_type_uint32(v, name, &value, errp);
+}
+
+static uint32_t
+sev_get_host_cbitpos(void)
+{
+ uint32_t ebx;
+
+ host_cpuid(0x8000001F, 0, NULL, &ebx, NULL, NULL);
+
+ return ebx & 0x3f;
+}
+
+static void
+qsev_guest_init(Object *obj)
+{
+ QSevGuestInfo *sev = QSEV_GUEST_INFO(obj);
+
+ sev->sev_device = g_strdup(DEFAULT_SEV_DEVICE);
+ sev->policy = DEFAULT_GUEST_POLICY;
+ sev->cbitpos = sev_get_host_cbitpos();
+ object_property_add(obj, "policy", "uint32", qsev_guest_get_policy,
+ qsev_guest_set_policy, NULL, NULL, NULL);
+ object_property_add(obj, "handle", "uint32", qsev_guest_get_handle,
+ qsev_guest_set_handle, NULL, NULL, NULL);
+ object_property_add(obj, "cbitpos", "uint32", qsev_guest_get_cbitpos,
+ qsev_guest_set_cbitpos, NULL, NULL, NULL);
+}
+
+/* sev guest info */
+static const TypeInfo qsev_guest_info = {
+ .parent = TYPE_OBJECT,
+ .name = TYPE_QSEV_GUEST_INFO,
+ .instance_size = sizeof(QSevGuestInfo),
+ .instance_finalize = qsev_guest_finalize,
+ .class_size = sizeof(QSevGuestInfoClass),
+ .class_init = qsev_guest_class_init,
+ .instance_init = qsev_guest_init,
+ .interfaces = (InterfaceInfo[]) {
+ { TYPE_USER_CREATABLE },
+ { }
+ }
+};
+
+static void
+sev_register_types(void)
+{
+ type_register_static(&qsev_guest_info);
+}
+
+type_init(sev_register_types);
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread
* [PATCH v8 10/28] sev/i386: add command to initialize the memory encryption context
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:36 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
When memory encryption is enabled, KVM_SEV_INIT command is used to
initialize the platform. The command loads the SEV related persistent
data from non-volatile storage and initializes the platform context.
This command should be first issued before invoking any other guest
commands provided by the SEV firmware.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
accel/kvm/kvm-all.c | 15 +++++
include/sysemu/sev.h | 16 +++++
stubs/Makefile.objs | 1 +
stubs/sev.c | 43 +++++++++++++
target/i386/sev.c | 161 +++++++++++++++++++++++++++++++++++++++++++++++
target/i386/trace-events | 3 +
6 files changed, 239 insertions(+)
create mode 100644 stubs/sev.c
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index b91fcb7160d3..300fc3cd44ce 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -38,6 +38,7 @@
#include "qemu/event_notifier.h"
#include "trace.h"
#include "hw/irq.h"
+#include "sysemu/sev.h"
#include "hw/boards.h"
@@ -103,6 +104,9 @@ struct KVMState
#endif
KVMMemoryListener memory_listener;
QLIST_HEAD(, KVMParkedVcpu) kvm_parked_vcpus;
+
+ /* memory encryption */
+ void *memcrypt_handle;
};
KVMState *kvm_state;
@@ -1636,6 +1640,17 @@ static int kvm_init(MachineState *ms)
kvm_state = s;
+ /*
+ * if memory encryption object is specified then initialize the memory
+ * encryption context.
+ */
+ if (ms->memory_encryption) {
+ kvm_state->memcrypt_handle = sev_guest_init(ms->memory_encryption);
+ if (!kvm_state->memcrypt_handle) {
+ goto err;
+ }
+ }
+
ret = kvm_arch_init(ms, s);
if (ret < 0) {
goto err;
diff --git a/include/sysemu/sev.h b/include/sysemu/sev.h
index eed679653dbc..121e7e4aa44c 100644
--- a/include/sysemu/sev.h
+++ b/include/sysemu/sev.h
@@ -14,6 +14,8 @@
#ifndef QEMU_SEV_H
#define QEMU_SEV_H
+#include <linux/kvm.h>
+
#include "qom/object.h"
#include "qapi/error.h"
#include "sysemu/kvm.h"
@@ -23,6 +25,12 @@
#define QSEV_GUEST_INFO(obj) \
OBJECT_CHECK(QSevGuestInfo, (obj), TYPE_QSEV_GUEST_INFO)
+extern bool sev_enabled(void);
+extern uint64_t sev_get_me_mask(void);
+extern void sev_get_current_state(char **state);
+extern void sev_get_fw_version(uint8_t *major, uint8_t *minor, uint8_t *build);
+extern void sev_get_policy(uint32_t *policy);
+
typedef struct QSevGuestInfo QSevGuestInfo;
typedef struct QSevGuestInfoClass QSevGuestInfoClass;
@@ -50,5 +58,13 @@ struct QSevGuestInfoClass {
ObjectClass parent_class;
};
+struct SEVState {
+ QSevGuestInfo *sev_info;
+};
+
+typedef struct SEVState SEVState;
+
+void *sev_guest_init(const char *id);
+
#endif
diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs
index 2d59d8409162..31b36fdfdb88 100644
--- a/stubs/Makefile.objs
+++ b/stubs/Makefile.objs
@@ -43,3 +43,4 @@ stub-obj-y += xen-common.o
stub-obj-y += xen-hvm.o
stub-obj-y += pci-host-piix.o
stub-obj-y += ram-block.o
+stub-obj-y += sev.o
diff --git a/stubs/sev.c b/stubs/sev.c
new file mode 100644
index 000000000000..e3076f009a48
--- /dev/null
+++ b/stubs/sev.c
@@ -0,0 +1,43 @@
+/*
+ * QEMU SEV stub
+ *
+ * Copyright Advanced Micro Devices 2018
+ *
+ * Authors:
+ * Brijesh Singh <brijesh.singh@amd.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "sysemu/sev.h"
+
+void sev_get_current_state(char **state)
+{
+}
+
+bool sev_enabled(void)
+{
+ return false;
+}
+
+void *sev_guest_init(const char *id)
+{
+ return NULL;
+}
+
+uint64_t sev_get_me_mask(void)
+{
+ return ~0UL;
+}
+
+void sev_get_fw_version(uint8_t *major, uint8_t *minor, uint8_t *build)
+{
+}
+
+void sev_get_policy(uint32_t *policy)
+{
+}
diff --git a/target/i386/sev.c b/target/i386/sev.c
index 57e092a0bddd..d5fd975792b8 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -18,10 +18,74 @@
#include "sysemu/kvm.h"
#include "sysemu/sev.h"
#include "sysemu/sysemu.h"
+#include "trace.h"
#define DEFAULT_GUEST_POLICY 0x1 /* disable debug */
#define DEFAULT_SEV_DEVICE "/dev/sev"
+static uint64_t me_mask;
+static bool sev_active;
+static int sev_fd;
+
+#define SEV_FW_MAX_ERROR 0x17
+
+static const char *const sev_fw_errlist[] = {
+ "",
+ "Platform state is invalid",
+ "Guest state is invalid",
+ "Platform configuration is invalid",
+ "Buffer too small",
+ "Platform is already owned",
+ "Certificate is invalid",
+ "Policy is not allowed",
+ "Guest is not active",
+ "Invalid address",
+ "Bad signature",
+ "Bad measurement",
+ "Asid is already owned",
+ "Invalid ASID",
+ "WBINVD is required",
+ "DF_FLUSH is required",
+ "Guest handle is invalid",
+ "Invalid command",
+ "Guest is active",
+ "Hardware error",
+ "Hardware unsafe",
+ "Feature not supported",
+ "Invalid parameter"
+};
+
+static int
+sev_ioctl(int cmd, void *data, int *error)
+{
+ int r;
+ struct kvm_sev_cmd input;
+
+ memset(&input, 0x0, sizeof(input));
+
+ input.id = cmd;
+ input.sev_fd = sev_fd;
+ input.data = (__u64)data;
+
+ r = kvm_vm_ioctl(kvm_state, KVM_MEMORY_ENCRYPT_OP, &input);
+
+ if (error) {
+ *error = input.error;
+ }
+
+ return r;
+}
+
+static const char *
+fw_error_to_str(int code)
+{
+ if (code >= SEV_FW_MAX_ERROR) {
+ return "unknown error";
+ }
+
+ return sev_fw_errlist[code];
+}
+
static void
qsev_guest_finalize(Object *obj)
{
@@ -205,6 +269,103 @@ static const TypeInfo qsev_guest_info = {
}
};
+static QSevGuestInfo *
+lookup_sev_guest_info(const char *id)
+{
+ Object *obj;
+ QSevGuestInfo *info;
+
+ obj = object_resolve_path_component(object_get_objects_root(), id);
+ if (!obj) {
+ return NULL;
+ }
+
+ info = (QSevGuestInfo *)
+ object_dynamic_cast(obj, TYPE_QSEV_GUEST_INFO);
+ if (!info) {
+ return NULL;
+ }
+
+ return info;
+}
+
+uint64_t
+sev_get_me_mask(void)
+{
+ return ~me_mask;
+}
+
+void
+sev_get_current_state(char **state)
+{
+}
+
+bool
+sev_enabled(void)
+{
+ return sev_active;
+}
+
+void
+sev_get_fw_version(uint8_t *major, uint8_t *minor, uint8_t *build)
+{
+}
+
+void
+sev_get_policy(uint32_t *policy)
+{
+}
+
+void *
+sev_guest_init(const char *id)
+{
+ SEVState *s;
+ char *devname;
+ int ret, fw_error;
+ uint32_t host_cbitpos, cbitpos;
+
+ s = g_new0(SEVState, 1);
+ s->sev_info = lookup_sev_guest_info(id);
+ if (!s->sev_info) {
+ error_report("%s: '%s' is not a valid '%s' object",
+ __func__, id, TYPE_QSEV_GUEST_INFO);
+ goto err;
+ }
+
+ host_cbitpos = sev_get_host_cbitpos();
+ cbitpos = object_property_get_int(OBJECT(s->sev_info), "cbitpos", NULL);
+ if (host_cbitpos != cbitpos) {
+ error_report("%s: cbitpos check failed, host '%d' request '%d'",
+ __func__, host_cbitpos, cbitpos);
+ goto err;
+ }
+
+ me_mask = (1UL << cbitpos);
+
+ devname = object_property_get_str(OBJECT(s->sev_info), "sev-device", NULL);
+ sev_fd = open(devname, O_RDWR);
+ if (sev_fd < 0) {
+ error_report("%s: Failed to open %s '%s'", __func__,
+ devname, strerror(errno));
+ goto err;
+ }
+ g_free(devname);
+
+ trace_kvm_sev_init();
+ ret = sev_ioctl(KVM_SEV_INIT, NULL, &fw_error);
+ if (ret) {
+ error_report("%s: failed to initialize ret=%d fw_error=%d '%s'",
+ __func__, ret, fw_error, fw_error_to_str(fw_error));
+ goto err;
+ }
+
+ sev_active = true;
+ return s;
+err:
+ g_free(s);
+ return NULL;
+}
+
static void
sev_register_types(void)
{
diff --git a/target/i386/trace-events b/target/i386/trace-events
index 3153fd445488..797b716751b7 100644
--- a/target/i386/trace-events
+++ b/target/i386/trace-events
@@ -5,3 +5,6 @@ kvm_x86_fixup_msi_error(uint32_t gsi) "VT-d failed to remap interrupt for GSI %"
kvm_x86_add_msi_route(int virq) "Adding route entry for virq %d"
kvm_x86_remove_msi_route(int virq) "Removing route entry for virq %d"
kvm_x86_update_msi_routes(int num) "Updated %d MSI routes"
+
+# target/i386/sev.c
+kvm_sev_init(void) ""
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 10/28] sev/i386: add command to initialize the memory encryption context
@ 2018-02-12 15:36 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh, Richard Henderson
When memory encryption is enabled, KVM_SEV_INIT command is used to
initialize the platform. The command loads the SEV related persistent
data from non-volatile storage and initializes the platform context.
This command should be first issued before invoking any other guest
commands provided by the SEV firmware.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
accel/kvm/kvm-all.c | 15 +++++
include/sysemu/sev.h | 16 +++++
stubs/Makefile.objs | 1 +
stubs/sev.c | 43 +++++++++++++
target/i386/sev.c | 161 +++++++++++++++++++++++++++++++++++++++++++++++
target/i386/trace-events | 3 +
6 files changed, 239 insertions(+)
create mode 100644 stubs/sev.c
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index b91fcb7160d3..300fc3cd44ce 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -38,6 +38,7 @@
#include "qemu/event_notifier.h"
#include "trace.h"
#include "hw/irq.h"
+#include "sysemu/sev.h"
#include "hw/boards.h"
@@ -103,6 +104,9 @@ struct KVMState
#endif
KVMMemoryListener memory_listener;
QLIST_HEAD(, KVMParkedVcpu) kvm_parked_vcpus;
+
+ /* memory encryption */
+ void *memcrypt_handle;
};
KVMState *kvm_state;
@@ -1636,6 +1640,17 @@ static int kvm_init(MachineState *ms)
kvm_state = s;
+ /*
+ * if memory encryption object is specified then initialize the memory
+ * encryption context.
+ */
+ if (ms->memory_encryption) {
+ kvm_state->memcrypt_handle = sev_guest_init(ms->memory_encryption);
+ if (!kvm_state->memcrypt_handle) {
+ goto err;
+ }
+ }
+
ret = kvm_arch_init(ms, s);
if (ret < 0) {
goto err;
diff --git a/include/sysemu/sev.h b/include/sysemu/sev.h
index eed679653dbc..121e7e4aa44c 100644
--- a/include/sysemu/sev.h
+++ b/include/sysemu/sev.h
@@ -14,6 +14,8 @@
#ifndef QEMU_SEV_H
#define QEMU_SEV_H
+#include <linux/kvm.h>
+
#include "qom/object.h"
#include "qapi/error.h"
#include "sysemu/kvm.h"
@@ -23,6 +25,12 @@
#define QSEV_GUEST_INFO(obj) \
OBJECT_CHECK(QSevGuestInfo, (obj), TYPE_QSEV_GUEST_INFO)
+extern bool sev_enabled(void);
+extern uint64_t sev_get_me_mask(void);
+extern void sev_get_current_state(char **state);
+extern void sev_get_fw_version(uint8_t *major, uint8_t *minor, uint8_t *build);
+extern void sev_get_policy(uint32_t *policy);
+
typedef struct QSevGuestInfo QSevGuestInfo;
typedef struct QSevGuestInfoClass QSevGuestInfoClass;
@@ -50,5 +58,13 @@ struct QSevGuestInfoClass {
ObjectClass parent_class;
};
+struct SEVState {
+ QSevGuestInfo *sev_info;
+};
+
+typedef struct SEVState SEVState;
+
+void *sev_guest_init(const char *id);
+
#endif
diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs
index 2d59d8409162..31b36fdfdb88 100644
--- a/stubs/Makefile.objs
+++ b/stubs/Makefile.objs
@@ -43,3 +43,4 @@ stub-obj-y += xen-common.o
stub-obj-y += xen-hvm.o
stub-obj-y += pci-host-piix.o
stub-obj-y += ram-block.o
+stub-obj-y += sev.o
diff --git a/stubs/sev.c b/stubs/sev.c
new file mode 100644
index 000000000000..e3076f009a48
--- /dev/null
+++ b/stubs/sev.c
@@ -0,0 +1,43 @@
+/*
+ * QEMU SEV stub
+ *
+ * Copyright Advanced Micro Devices 2018
+ *
+ * Authors:
+ * Brijesh Singh <brijesh.singh@amd.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "sysemu/sev.h"
+
+void sev_get_current_state(char **state)
+{
+}
+
+bool sev_enabled(void)
+{
+ return false;
+}
+
+void *sev_guest_init(const char *id)
+{
+ return NULL;
+}
+
+uint64_t sev_get_me_mask(void)
+{
+ return ~0UL;
+}
+
+void sev_get_fw_version(uint8_t *major, uint8_t *minor, uint8_t *build)
+{
+}
+
+void sev_get_policy(uint32_t *policy)
+{
+}
diff --git a/target/i386/sev.c b/target/i386/sev.c
index 57e092a0bddd..d5fd975792b8 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -18,10 +18,74 @@
#include "sysemu/kvm.h"
#include "sysemu/sev.h"
#include "sysemu/sysemu.h"
+#include "trace.h"
#define DEFAULT_GUEST_POLICY 0x1 /* disable debug */
#define DEFAULT_SEV_DEVICE "/dev/sev"
+static uint64_t me_mask;
+static bool sev_active;
+static int sev_fd;
+
+#define SEV_FW_MAX_ERROR 0x17
+
+static const char *const sev_fw_errlist[] = {
+ "",
+ "Platform state is invalid",
+ "Guest state is invalid",
+ "Platform configuration is invalid",
+ "Buffer too small",
+ "Platform is already owned",
+ "Certificate is invalid",
+ "Policy is not allowed",
+ "Guest is not active",
+ "Invalid address",
+ "Bad signature",
+ "Bad measurement",
+ "Asid is already owned",
+ "Invalid ASID",
+ "WBINVD is required",
+ "DF_FLUSH is required",
+ "Guest handle is invalid",
+ "Invalid command",
+ "Guest is active",
+ "Hardware error",
+ "Hardware unsafe",
+ "Feature not supported",
+ "Invalid parameter"
+};
+
+static int
+sev_ioctl(int cmd, void *data, int *error)
+{
+ int r;
+ struct kvm_sev_cmd input;
+
+ memset(&input, 0x0, sizeof(input));
+
+ input.id = cmd;
+ input.sev_fd = sev_fd;
+ input.data = (__u64)data;
+
+ r = kvm_vm_ioctl(kvm_state, KVM_MEMORY_ENCRYPT_OP, &input);
+
+ if (error) {
+ *error = input.error;
+ }
+
+ return r;
+}
+
+static const char *
+fw_error_to_str(int code)
+{
+ if (code >= SEV_FW_MAX_ERROR) {
+ return "unknown error";
+ }
+
+ return sev_fw_errlist[code];
+}
+
static void
qsev_guest_finalize(Object *obj)
{
@@ -205,6 +269,103 @@ static const TypeInfo qsev_guest_info = {
}
};
+static QSevGuestInfo *
+lookup_sev_guest_info(const char *id)
+{
+ Object *obj;
+ QSevGuestInfo *info;
+
+ obj = object_resolve_path_component(object_get_objects_root(), id);
+ if (!obj) {
+ return NULL;
+ }
+
+ info = (QSevGuestInfo *)
+ object_dynamic_cast(obj, TYPE_QSEV_GUEST_INFO);
+ if (!info) {
+ return NULL;
+ }
+
+ return info;
+}
+
+uint64_t
+sev_get_me_mask(void)
+{
+ return ~me_mask;
+}
+
+void
+sev_get_current_state(char **state)
+{
+}
+
+bool
+sev_enabled(void)
+{
+ return sev_active;
+}
+
+void
+sev_get_fw_version(uint8_t *major, uint8_t *minor, uint8_t *build)
+{
+}
+
+void
+sev_get_policy(uint32_t *policy)
+{
+}
+
+void *
+sev_guest_init(const char *id)
+{
+ SEVState *s;
+ char *devname;
+ int ret, fw_error;
+ uint32_t host_cbitpos, cbitpos;
+
+ s = g_new0(SEVState, 1);
+ s->sev_info = lookup_sev_guest_info(id);
+ if (!s->sev_info) {
+ error_report("%s: '%s' is not a valid '%s' object",
+ __func__, id, TYPE_QSEV_GUEST_INFO);
+ goto err;
+ }
+
+ host_cbitpos = sev_get_host_cbitpos();
+ cbitpos = object_property_get_int(OBJECT(s->sev_info), "cbitpos", NULL);
+ if (host_cbitpos != cbitpos) {
+ error_report("%s: cbitpos check failed, host '%d' request '%d'",
+ __func__, host_cbitpos, cbitpos);
+ goto err;
+ }
+
+ me_mask = (1UL << cbitpos);
+
+ devname = object_property_get_str(OBJECT(s->sev_info), "sev-device", NULL);
+ sev_fd = open(devname, O_RDWR);
+ if (sev_fd < 0) {
+ error_report("%s: Failed to open %s '%s'", __func__,
+ devname, strerror(errno));
+ goto err;
+ }
+ g_free(devname);
+
+ trace_kvm_sev_init();
+ ret = sev_ioctl(KVM_SEV_INIT, NULL, &fw_error);
+ if (ret) {
+ error_report("%s: failed to initialize ret=%d fw_error=%d '%s'",
+ __func__, ret, fw_error, fw_error_to_str(fw_error));
+ goto err;
+ }
+
+ sev_active = true;
+ return s;
+err:
+ g_free(s);
+ return NULL;
+}
+
static void
sev_register_types(void)
{
diff --git a/target/i386/trace-events b/target/i386/trace-events
index 3153fd445488..797b716751b7 100644
--- a/target/i386/trace-events
+++ b/target/i386/trace-events
@@ -5,3 +5,6 @@ kvm_x86_fixup_msi_error(uint32_t gsi) "VT-d failed to remap interrupt for GSI %"
kvm_x86_add_msi_route(int virq) "Adding route entry for virq %d"
kvm_x86_remove_msi_route(int virq) "Removing route entry for virq %d"
kvm_x86_update_msi_routes(int num) "Updated %d MSI routes"
+
+# target/i386/sev.c
+kvm_sev_init(void) ""
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* Re: [PATCH v8 10/28] sev/i386: add command to initialize the memory encryption context
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 18:57 ` Eduardo Habkost
-1 siblings, 0 replies; 77+ messages in thread
From: Eduardo Habkost @ 2018-02-12 18:57 UTC (permalink / raw)
To: Brijesh Singh
Cc: qemu-devel, Alistair Francis, Christian Borntraeger,
Cornelia Huck, Daniel P . Berrange, Dr. David Alan Gilbert,
Michael S. Tsirkin, Edgar E. Iglesias, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov
On Mon, Feb 12, 2018 at 09:36:57AM -0600, Brijesh Singh wrote:
[...]
> +#define SEV_FW_MAX_ERROR 0x17
> +
> +static const char *const sev_fw_errlist[] = {
This requires anybody reading the code to manually count the
number of items on the array to be sure fw_error_to_str() is
safe.
What about:
#define SEV_FW_MAX_ERROR ARRAY_SIZE(sev_fw_errlist)
> + "",
> + "Platform state is invalid",
> + "Guest state is invalid",
> + "Platform configuration is invalid",
> + "Buffer too small",
> + "Platform is already owned",
> + "Certificate is invalid",
> + "Policy is not allowed",
> + "Guest is not active",
> + "Invalid address",
> + "Bad signature",
> + "Bad measurement",
> + "Asid is already owned",
> + "Invalid ASID",
> + "WBINVD is required",
> + "DF_FLUSH is required",
> + "Guest handle is invalid",
> + "Invalid command",
> + "Guest is active",
> + "Hardware error",
> + "Hardware unsafe",
> + "Feature not supported",
> + "Invalid parameter"
> +};
[...]
> +fw_error_to_str(int code)
> +{
> + if (code >= SEV_FW_MAX_ERROR) {
> + return "unknown error";
> + }
> +
> + return sev_fw_errlist[code];
> +}
> +
--
Eduardo
^ permalink raw reply [flat|nested] 77+ messages in thread* Re: [Qemu-devel] [PATCH v8 10/28] sev/i386: add command to initialize the memory encryption context
@ 2018-02-12 18:57 ` Eduardo Habkost
0 siblings, 0 replies; 77+ messages in thread
From: Eduardo Habkost @ 2018-02-12 18:57 UTC (permalink / raw)
To: Brijesh Singh
Cc: qemu-devel, Alistair Francis, Christian Borntraeger,
Cornelia Huck, Daniel P . Berrange, Dr. David Alan Gilbert,
Michael S. Tsirkin, Edgar E. Iglesias, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Richard Henderson
On Mon, Feb 12, 2018 at 09:36:57AM -0600, Brijesh Singh wrote:
[...]
> +#define SEV_FW_MAX_ERROR 0x17
> +
> +static const char *const sev_fw_errlist[] = {
This requires anybody reading the code to manually count the
number of items on the array to be sure fw_error_to_str() is
safe.
What about:
#define SEV_FW_MAX_ERROR ARRAY_SIZE(sev_fw_errlist)
> + "",
> + "Platform state is invalid",
> + "Guest state is invalid",
> + "Platform configuration is invalid",
> + "Buffer too small",
> + "Platform is already owned",
> + "Certificate is invalid",
> + "Policy is not allowed",
> + "Guest is not active",
> + "Invalid address",
> + "Bad signature",
> + "Bad measurement",
> + "Asid is already owned",
> + "Invalid ASID",
> + "WBINVD is required",
> + "DF_FLUSH is required",
> + "Guest handle is invalid",
> + "Invalid command",
> + "Guest is active",
> + "Hardware error",
> + "Hardware unsafe",
> + "Feature not supported",
> + "Invalid parameter"
> +};
[...]
> +fw_error_to_str(int code)
> +{
> + if (code >= SEV_FW_MAX_ERROR) {
> + return "unknown error";
> + }
> +
> + return sev_fw_errlist[code];
> +}
> +
--
Eduardo
^ permalink raw reply [flat|nested] 77+ messages in thread
* [PATCH v8 11/28] sev/i386: register the guest memory range which may contain encrypted data
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:36 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
When SEV is enabled, the hardware encryption engine uses a tweak such
that the two identical plaintext at different location will have a
different ciphertexts. So swapping or moving a ciphertexts of two guest
pages will not result in plaintexts being swapped. Hence relocating
a physical backing pages of the SEV guest will require some additional
steps in KVM driver. The KVM_MEMORY_ENCRYPT_{UN,}REG_REGION ioctl can be
used to register/unregister the guest memory region which may contain the
encrypted data. KVM driver will internally handle the relocating physical
backing pages of registered memory regions.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
target/i386/sev.c | 41 +++++++++++++++++++++++++++++++++++++++++
target/i386/trace-events | 2 ++
2 files changed, 43 insertions(+)
diff --git a/target/i386/sev.c b/target/i386/sev.c
index d5fd975792b8..2c4bbba3c367 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -86,6 +86,45 @@ fw_error_to_str(int code)
return sev_fw_errlist[code];
}
+static void
+sev_ram_block_added(RAMBlockNotifier *n, void *host, size_t size)
+{
+ int r;
+ struct kvm_enc_region range;
+
+ range.addr = (__u64)host;
+ range.size = size;
+
+ trace_kvm_memcrypt_register_region(host, size);
+ r = kvm_vm_ioctl(kvm_state, KVM_MEMORY_ENCRYPT_REG_REGION, &range);
+ if (r) {
+ error_report("%s: failed to register region (%p+%#lx)",
+ __func__, host, size);
+ }
+}
+
+static void
+sev_ram_block_removed(RAMBlockNotifier *n, void *host, size_t size)
+{
+ int r;
+ struct kvm_enc_region range;
+
+ range.addr = (__u64)host;
+ range.size = size;
+
+ trace_kvm_memcrypt_unregister_region(host, size);
+ r = kvm_vm_ioctl(kvm_state, KVM_MEMORY_ENCRYPT_UNREG_REGION, &range);
+ if (r) {
+ error_report("%s: failed to unregister region (%p+%#lx)",
+ __func__, host, size);
+ }
+}
+
+static struct RAMBlockNotifier sev_ram_notifier = {
+ .ram_block_added = sev_ram_block_added,
+ .ram_block_removed = sev_ram_block_removed,
+};
+
static void
qsev_guest_finalize(Object *obj)
{
@@ -360,6 +399,8 @@ sev_guest_init(const char *id)
}
sev_active = true;
+ ram_block_notifier_add(&sev_ram_notifier);
+
return s;
err:
g_free(s);
diff --git a/target/i386/trace-events b/target/i386/trace-events
index 797b716751b7..ffa3d2250425 100644
--- a/target/i386/trace-events
+++ b/target/i386/trace-events
@@ -8,3 +8,5 @@ kvm_x86_update_msi_routes(int num) "Updated %d MSI routes"
# target/i386/sev.c
kvm_sev_init(void) ""
+kvm_memcrypt_register_region(void *addr, size_t len) "addr %p len 0x%lu"
+kvm_memcrypt_unregister_region(void *addr, size_t len) "addr %p len 0x%lu"
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 11/28] sev/i386: register the guest memory range which may contain encrypted data
@ 2018-02-12 15:36 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh, Richard Henderson
When SEV is enabled, the hardware encryption engine uses a tweak such
that the two identical plaintext at different location will have a
different ciphertexts. So swapping or moving a ciphertexts of two guest
pages will not result in plaintexts being swapped. Hence relocating
a physical backing pages of the SEV guest will require some additional
steps in KVM driver. The KVM_MEMORY_ENCRYPT_{UN,}REG_REGION ioctl can be
used to register/unregister the guest memory region which may contain the
encrypted data. KVM driver will internally handle the relocating physical
backing pages of registered memory regions.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
target/i386/sev.c | 41 +++++++++++++++++++++++++++++++++++++++++
target/i386/trace-events | 2 ++
2 files changed, 43 insertions(+)
diff --git a/target/i386/sev.c b/target/i386/sev.c
index d5fd975792b8..2c4bbba3c367 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -86,6 +86,45 @@ fw_error_to_str(int code)
return sev_fw_errlist[code];
}
+static void
+sev_ram_block_added(RAMBlockNotifier *n, void *host, size_t size)
+{
+ int r;
+ struct kvm_enc_region range;
+
+ range.addr = (__u64)host;
+ range.size = size;
+
+ trace_kvm_memcrypt_register_region(host, size);
+ r = kvm_vm_ioctl(kvm_state, KVM_MEMORY_ENCRYPT_REG_REGION, &range);
+ if (r) {
+ error_report("%s: failed to register region (%p+%#lx)",
+ __func__, host, size);
+ }
+}
+
+static void
+sev_ram_block_removed(RAMBlockNotifier *n, void *host, size_t size)
+{
+ int r;
+ struct kvm_enc_region range;
+
+ range.addr = (__u64)host;
+ range.size = size;
+
+ trace_kvm_memcrypt_unregister_region(host, size);
+ r = kvm_vm_ioctl(kvm_state, KVM_MEMORY_ENCRYPT_UNREG_REGION, &range);
+ if (r) {
+ error_report("%s: failed to unregister region (%p+%#lx)",
+ __func__, host, size);
+ }
+}
+
+static struct RAMBlockNotifier sev_ram_notifier = {
+ .ram_block_added = sev_ram_block_added,
+ .ram_block_removed = sev_ram_block_removed,
+};
+
static void
qsev_guest_finalize(Object *obj)
{
@@ -360,6 +399,8 @@ sev_guest_init(const char *id)
}
sev_active = true;
+ ram_block_notifier_add(&sev_ram_notifier);
+
return s;
err:
g_free(s);
diff --git a/target/i386/trace-events b/target/i386/trace-events
index 797b716751b7..ffa3d2250425 100644
--- a/target/i386/trace-events
+++ b/target/i386/trace-events
@@ -8,3 +8,5 @@ kvm_x86_update_msi_routes(int num) "Updated %d MSI routes"
# target/i386/sev.c
kvm_sev_init(void) ""
+kvm_memcrypt_register_region(void *addr, size_t len) "addr %p len 0x%lu"
+kvm_memcrypt_unregister_region(void *addr, size_t len) "addr %p len 0x%lu"
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread
* [PATCH v8 12/28] kvm: introduce memory encryption APIs
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:36 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
Inorder to integerate the Secure Encryption Virtualization (SEV) support
add few high-level memory encryption APIs which can be used for encrypting
the guest memory region.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
accel/kvm/kvm-all.c | 30 ++++++++++++++++++++++++++++++
accel/stubs/kvm-stub.c | 14 ++++++++++++++
include/sysemu/kvm.h | 25 +++++++++++++++++++++++++
3 files changed, 69 insertions(+)
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 300fc3cd44ce..4468c8fe002c 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -107,6 +107,8 @@ struct KVMState
/* memory encryption */
void *memcrypt_handle;
+ int (*memcrypt_encrypt_data)(void *handle, uint8_t *ptr, uint64_t len);
+ void (*memcrypt_debug_ops)(void *handle, MemoryRegion *mr);
};
KVMState *kvm_state;
@@ -142,6 +144,34 @@ int kvm_get_max_memslots(void)
return s->nr_slots;
}
+bool kvm_memcrypt_enabled(void)
+{
+ if (kvm_state && kvm_state->memcrypt_handle) {
+ return true;
+ }
+
+ return false;
+}
+
+int kvm_memcrypt_encrypt_data(uint8_t *ptr, uint64_t len)
+{
+ if (kvm_state->memcrypt_handle &&
+ kvm_state->memcrypt_encrypt_data) {
+ return kvm_state->memcrypt_encrypt_data(kvm_state->memcrypt_handle,
+ ptr, len);
+ }
+
+ return 1;
+}
+
+void kvm_memcrypt_set_debug_ops(MemoryRegion *mr)
+{
+ if (kvm_state->memcrypt_handle &&
+ kvm_state->memcrypt_debug_ops) {
+ kvm_state->memcrypt_debug_ops(kvm_state->memcrypt_handle, mr);
+ }
+}
+
static KVMSlot *kvm_get_free_slot(KVMMemoryListener *kml)
{
KVMState *s = kvm_state;
diff --git a/accel/stubs/kvm-stub.c b/accel/stubs/kvm-stub.c
index c964af3e1c97..5739712a67e3 100644
--- a/accel/stubs/kvm-stub.c
+++ b/accel/stubs/kvm-stub.c
@@ -105,6 +105,20 @@ int kvm_on_sigbus(int code, void *addr)
return 1;
}
+bool kvm_memcrypt_enabled(void)
+{
+ return false;
+}
+
+int kvm_memcrypt_encrypt_data(uint8_t *ptr, uint64_t len)
+{
+ return 1;
+}
+
+void kvm_memcrypt_set_debug_ops(MemoryRegion *mr)
+{
+}
+
#ifndef CONFIG_USER_ONLY
int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
{
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index bbf12a172339..4a5db5dde390 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -231,6 +231,31 @@ int kvm_destroy_vcpu(CPUState *cpu);
*/
bool kvm_arm_supports_user_irq(void);
+/**
+ * kvm_memcrypt_enabled - return boolean indicating whether memory encryption
+ * is enabled
+ * Returns: 1 memory encryption is enabled
+ * 0 memory encryption is disabled
+ */
+bool kvm_memcrypt_enabled(void);
+
+/**
+ * kvm_memcrypt_encrypt_data: encrypt the memory range
+ *
+ * Return: 1 failed to encrypt the range
+ * 0 succesfully encrypted memory region
+ */
+int kvm_memcrypt_encrypt_data(uint8_t *ptr, uint64_t len);
+
+/**
+ * kvm_memcrypt_set_debug_ram_ops: set debug_ram_ops callback
+ *
+ * When debug_ram_ops is set, debug access to this memory region will use
+ * memory encryption APIs.
+ */
+void kvm_memcrypt_set_debug_ops(MemoryRegion *mr);
+
+
#ifdef NEED_CPU_H
#include "cpu.h"
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 12/28] kvm: introduce memory encryption APIs
@ 2018-02-12 15:36 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:36 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh
Inorder to integerate the Secure Encryption Virtualization (SEV) support
add few high-level memory encryption APIs which can be used for encrypting
the guest memory region.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
accel/kvm/kvm-all.c | 30 ++++++++++++++++++++++++++++++
accel/stubs/kvm-stub.c | 14 ++++++++++++++
include/sysemu/kvm.h | 25 +++++++++++++++++++++++++
3 files changed, 69 insertions(+)
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 300fc3cd44ce..4468c8fe002c 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -107,6 +107,8 @@ struct KVMState
/* memory encryption */
void *memcrypt_handle;
+ int (*memcrypt_encrypt_data)(void *handle, uint8_t *ptr, uint64_t len);
+ void (*memcrypt_debug_ops)(void *handle, MemoryRegion *mr);
};
KVMState *kvm_state;
@@ -142,6 +144,34 @@ int kvm_get_max_memslots(void)
return s->nr_slots;
}
+bool kvm_memcrypt_enabled(void)
+{
+ if (kvm_state && kvm_state->memcrypt_handle) {
+ return true;
+ }
+
+ return false;
+}
+
+int kvm_memcrypt_encrypt_data(uint8_t *ptr, uint64_t len)
+{
+ if (kvm_state->memcrypt_handle &&
+ kvm_state->memcrypt_encrypt_data) {
+ return kvm_state->memcrypt_encrypt_data(kvm_state->memcrypt_handle,
+ ptr, len);
+ }
+
+ return 1;
+}
+
+void kvm_memcrypt_set_debug_ops(MemoryRegion *mr)
+{
+ if (kvm_state->memcrypt_handle &&
+ kvm_state->memcrypt_debug_ops) {
+ kvm_state->memcrypt_debug_ops(kvm_state->memcrypt_handle, mr);
+ }
+}
+
static KVMSlot *kvm_get_free_slot(KVMMemoryListener *kml)
{
KVMState *s = kvm_state;
diff --git a/accel/stubs/kvm-stub.c b/accel/stubs/kvm-stub.c
index c964af3e1c97..5739712a67e3 100644
--- a/accel/stubs/kvm-stub.c
+++ b/accel/stubs/kvm-stub.c
@@ -105,6 +105,20 @@ int kvm_on_sigbus(int code, void *addr)
return 1;
}
+bool kvm_memcrypt_enabled(void)
+{
+ return false;
+}
+
+int kvm_memcrypt_encrypt_data(uint8_t *ptr, uint64_t len)
+{
+ return 1;
+}
+
+void kvm_memcrypt_set_debug_ops(MemoryRegion *mr)
+{
+}
+
#ifndef CONFIG_USER_ONLY
int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
{
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index bbf12a172339..4a5db5dde390 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -231,6 +231,31 @@ int kvm_destroy_vcpu(CPUState *cpu);
*/
bool kvm_arm_supports_user_irq(void);
+/**
+ * kvm_memcrypt_enabled - return boolean indicating whether memory encryption
+ * is enabled
+ * Returns: 1 memory encryption is enabled
+ * 0 memory encryption is disabled
+ */
+bool kvm_memcrypt_enabled(void);
+
+/**
+ * kvm_memcrypt_encrypt_data: encrypt the memory range
+ *
+ * Return: 1 failed to encrypt the range
+ * 0 succesfully encrypted memory region
+ */
+int kvm_memcrypt_encrypt_data(uint8_t *ptr, uint64_t len);
+
+/**
+ * kvm_memcrypt_set_debug_ram_ops: set debug_ram_ops callback
+ *
+ * When debug_ram_ops is set, debug access to this memory region will use
+ * memory encryption APIs.
+ */
+void kvm_memcrypt_set_debug_ops(MemoryRegion *mr);
+
+
#ifdef NEED_CPU_H
#include "cpu.h"
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread
* [PATCH v8 13/28] qmp: add query-sev command
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:37 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
The QMP query command can used to retrieve the SEV information when
memory encryption is enabled on AMD platform.
Cc: "Daniel P. Berrangé" <berrange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
qapi-schema.json | 47 +++++++++++++++++++++++++++++++++++++++++++++++
qmp.c | 16 ++++++++++++++++
2 files changed, 63 insertions(+)
diff --git a/qapi-schema.json b/qapi-schema.json
index 5c06745c7927..9203e28b8aee 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -3189,3 +3189,50 @@
# Since: 2.11
##
{ 'command': 'watchdog-set-action', 'data' : {'action': 'WatchdogAction'} }
+
+##
+# @SevInfo:
+#
+# Information about Secure Encrypted Virtualization (SEV) support
+#
+# @enabled: true if SEV is active
+#
+# @api-major: SEV API major version
+#
+# @api-minor: SEV API minor version
+#
+# @build-id: SEV FW build id
+#
+# @policy: SEV policy value
+#
+# @state: SEV guest state
+#
+# Since: 2.12
+##
+{ 'struct': 'SevInfo',
+ 'data': { 'enabled': 'bool',
+ 'api-major': 'uint8',
+ 'api-minor' : 'uint8',
+ 'build-id' : 'uint8',
+ 'policy' : 'uint32',
+ 'state' : 'str'
+ }
+}
+
+##
+# @query-sev:
+#
+# Returns information about SEV
+#
+# Returns: @SevInfo
+#
+# Since: 2.12
+#
+# Example:
+#
+# -> { "execute": "query-sev" }
+# <- { "return": { "enabled": true, "api-major" : 0, "api-minor" : 0,
+# "build-id" : 0, "policy" : 0, "state" : "running" } }
+#
+##
+{ 'command': 'query-sev', 'returns': 'SevInfo' }
diff --git a/qmp.c b/qmp.c
index 793f6f332302..7907e539c8f2 100644
--- a/qmp.c
+++ b/qmp.c
@@ -39,6 +39,7 @@
#include "qom/object_interfaces.h"
#include "hw/mem/pc-dimm.h"
#include "hw/acpi/acpi_dev_interface.h"
+#include "sysemu/sev.h"
NameInfo *qmp_query_name(Error **errp)
{
@@ -719,3 +720,18 @@ MemoryInfo *qmp_query_memory_size_summary(Error **errp)
return mem_info;
}
+
+SevInfo *qmp_query_sev(Error **errp)
+{
+ SevInfo *info = g_malloc0(sizeof(*info));
+
+ info->enabled = sev_enabled();
+ if (info->enabled) {
+ sev_get_fw_version(&info->api_major,
+ &info->api_minor, &info->build_id);
+ sev_get_policy(&info->policy);
+ sev_get_current_state(&info->state);
+ }
+
+ return info;
+}
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 13/28] qmp: add query-sev command
@ 2018-02-12 15:37 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh
The QMP query command can used to retrieve the SEV information when
memory encryption is enabled on AMD platform.
Cc: "Daniel P. Berrangé" <berrange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
qapi-schema.json | 47 +++++++++++++++++++++++++++++++++++++++++++++++
qmp.c | 16 ++++++++++++++++
2 files changed, 63 insertions(+)
diff --git a/qapi-schema.json b/qapi-schema.json
index 5c06745c7927..9203e28b8aee 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -3189,3 +3189,50 @@
# Since: 2.11
##
{ 'command': 'watchdog-set-action', 'data' : {'action': 'WatchdogAction'} }
+
+##
+# @SevInfo:
+#
+# Information about Secure Encrypted Virtualization (SEV) support
+#
+# @enabled: true if SEV is active
+#
+# @api-major: SEV API major version
+#
+# @api-minor: SEV API minor version
+#
+# @build-id: SEV FW build id
+#
+# @policy: SEV policy value
+#
+# @state: SEV guest state
+#
+# Since: 2.12
+##
+{ 'struct': 'SevInfo',
+ 'data': { 'enabled': 'bool',
+ 'api-major': 'uint8',
+ 'api-minor' : 'uint8',
+ 'build-id' : 'uint8',
+ 'policy' : 'uint32',
+ 'state' : 'str'
+ }
+}
+
+##
+# @query-sev:
+#
+# Returns information about SEV
+#
+# Returns: @SevInfo
+#
+# Since: 2.12
+#
+# Example:
+#
+# -> { "execute": "query-sev" }
+# <- { "return": { "enabled": true, "api-major" : 0, "api-minor" : 0,
+# "build-id" : 0, "policy" : 0, "state" : "running" } }
+#
+##
+{ 'command': 'query-sev', 'returns': 'SevInfo' }
diff --git a/qmp.c b/qmp.c
index 793f6f332302..7907e539c8f2 100644
--- a/qmp.c
+++ b/qmp.c
@@ -39,6 +39,7 @@
#include "qom/object_interfaces.h"
#include "hw/mem/pc-dimm.h"
#include "hw/acpi/acpi_dev_interface.h"
+#include "sysemu/sev.h"
NameInfo *qmp_query_name(Error **errp)
{
@@ -719,3 +720,18 @@ MemoryInfo *qmp_query_memory_size_summary(Error **errp)
return mem_info;
}
+
+SevInfo *qmp_query_sev(Error **errp)
+{
+ SevInfo *info = g_malloc0(sizeof(*info));
+
+ info->enabled = sev_enabled();
+ if (info->enabled) {
+ sev_get_fw_version(&info->api_major,
+ &info->api_minor, &info->build_id);
+ sev_get_policy(&info->policy);
+ sev_get_current_state(&info->state);
+ }
+
+ return info;
+}
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* Re: [PATCH v8 13/28] qmp: add query-sev command
2018-02-12 15:37 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 17:27 ` Eric Blake
-1 siblings, 0 replies; 77+ messages in thread
From: Eric Blake @ 2018-02-12 17:27 UTC (permalink / raw)
To: Brijesh Singh, qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, kvm, Marcel Apfelbaum,
Markus Armbruster, Paolo Bonzini, Peter Crosthwaite,
Peter Maydell, Richard Henderson, Stefan Hajnoczi,
Thomas Lendacky, Borislav Petkov, Alexander Graf
On 02/12/2018 09:37 AM, Brijesh Singh wrote:
> The QMP query command can used to retrieve the SEV information when
> memory encryption is enabled on AMD platform.
>
> Cc: "Daniel P. Berrangé" <berrange@redhat.com>
> Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
> Cc: Markus Armbruster <armbru@redhat.com>
> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
> ---
> +# @SevInfo:
> +#
> +# Information about Secure Encrypted Virtualization (SEV) support
> +#
> +# @enabled: true if SEV is active
> +#
> +# @api-major: SEV API major version
> +#
> +# @api-minor: SEV API minor version
> +#
> +# @build-id: SEV FW build id
> +#
> +# @policy: SEV policy value
> +#
> +# @state: SEV guest state
Is there a finite list of guest states?
> +#
> +# Since: 2.12
> +##
> +{ 'struct': 'SevInfo',
> + 'data': { 'enabled': 'bool',
> + 'api-major': 'uint8',
> + 'api-minor' : 'uint8',
> + 'build-id' : 'uint8',
> + 'policy' : 'uint32',
> + 'state' : 'str'
If so, this should be an enum type listing those possible states, rather
than an open-coded 'str' that can hold anything.
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
^ permalink raw reply [flat|nested] 77+ messages in thread* Re: [Qemu-devel] [PATCH v8 13/28] qmp: add query-sev command
@ 2018-02-12 17:27 ` Eric Blake
0 siblings, 0 replies; 77+ messages in thread
From: Eric Blake @ 2018-02-12 17:27 UTC (permalink / raw)
To: Brijesh Singh, qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, kvm, Marcel Apfelbaum,
Markus Armbruster, Paolo Bonzini, Peter Crosthwaite,
Peter Maydell, Richard Henderson, Stefan Hajnoczi,
Thomas Lendacky, Borislav Petkov, Alexander Graf, Bruce Rogers
On 02/12/2018 09:37 AM, Brijesh Singh wrote:
> The QMP query command can used to retrieve the SEV information when
> memory encryption is enabled on AMD platform.
>
> Cc: "Daniel P. Berrangé" <berrange@redhat.com>
> Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
> Cc: Markus Armbruster <armbru@redhat.com>
> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
> ---
> +# @SevInfo:
> +#
> +# Information about Secure Encrypted Virtualization (SEV) support
> +#
> +# @enabled: true if SEV is active
> +#
> +# @api-major: SEV API major version
> +#
> +# @api-minor: SEV API minor version
> +#
> +# @build-id: SEV FW build id
> +#
> +# @policy: SEV policy value
> +#
> +# @state: SEV guest state
Is there a finite list of guest states?
> +#
> +# Since: 2.12
> +##
> +{ 'struct': 'SevInfo',
> + 'data': { 'enabled': 'bool',
> + 'api-major': 'uint8',
> + 'api-minor' : 'uint8',
> + 'build-id' : 'uint8',
> + 'policy' : 'uint32',
> + 'state' : 'str'
If so, this should be an enum type listing those possible states, rather
than an open-coded 'str' that can hold anything.
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
^ permalink raw reply [flat|nested] 77+ messages in thread* Re: [PATCH v8 13/28] qmp: add query-sev command
2018-02-12 17:27 ` [Qemu-devel] " Eric Blake
@ 2018-02-12 18:47 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 18:47 UTC (permalink / raw)
To: Eric Blake, qemu-devel
Cc: brijesh.singh, Alistair Francis, Christian Borntraeger,
Cornelia Huck, Daniel P . Berrange, Dr. David Alan Gilbert,
Michael S. Tsirkin, Edgar E. Iglesias, Eduardo Habkost, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov
On 2/12/18 11:27 AM, Eric Blake wrote:
> On 02/12/2018 09:37 AM, Brijesh Singh wrote:
>> The QMP query command can used to retrieve the SEV information when
>> memory encryption is enabled on AMD platform.
>>
>> Cc: "Daniel P. Berrangé" <berrange@redhat.com>
>> Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
>> Cc: Markus Armbruster <armbru@redhat.com>
>> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
>> ---
>
>> +# @SevInfo:
>> +#
>> +# Information about Secure Encrypted Virtualization (SEV) support
>> +#
>> +# @enabled: true if SEV is active
>> +#
>> +# @api-major: SEV API major version
>> +#
>> +# @api-minor: SEV API minor version
>> +#
>> +# @build-id: SEV FW build id
>> +#
>> +# @policy: SEV policy value
>> +#
>> +# @state: SEV guest state
>
> Is there a finite list of guest states?
>
Yes, the list is finite.
include/sysemu/sev.h defines the enum
typedef enum {
SEV_STATE_UNINIT = 0,
SEV_STATE_LUPDATE,
SEV_STATE_SECRET,
SEV_STATE_RUNNING,
SEV_STATE_SUPDATE,
SEV_STATE_RUPDATE,
SEV_STATE_MAX
}
>> +#
>> +# Since: 2.12
>> +##
>> +{ 'struct': 'SevInfo',
>> + 'data': { 'enabled': 'bool',
>> + 'api-major': 'uint8',
>> + 'api-minor' : 'uint8',
>> + 'build-id' : 'uint8',
>> + 'policy' : 'uint32',
>> + 'state' : 'str'
>
> If so, this should be an enum type listing those possible states,
> rather than an open-coded 'str' that can hold anything.
>
If the preference is to return enum, then I can convert the state to
return enum instead of string.
^ permalink raw reply [flat|nested] 77+ messages in thread* Re: [Qemu-devel] [PATCH v8 13/28] qmp: add query-sev command
@ 2018-02-12 18:47 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 18:47 UTC (permalink / raw)
To: Eric Blake, qemu-devel
Cc: brijesh.singh, Alistair Francis, Christian Borntraeger,
Cornelia Huck, Daniel P . Berrange, Dr. David Alan Gilbert,
Michael S. Tsirkin, Edgar E. Iglesias, Eduardo Habkost, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers
On 2/12/18 11:27 AM, Eric Blake wrote:
> On 02/12/2018 09:37 AM, Brijesh Singh wrote:
>> The QMP query command can used to retrieve the SEV information when
>> memory encryption is enabled on AMD platform.
>>
>> Cc: "Daniel P. Berrangé" <berrange@redhat.com>
>> Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
>> Cc: Markus Armbruster <armbru@redhat.com>
>> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
>> ---
>
>> +# @SevInfo:
>> +#
>> +# Information about Secure Encrypted Virtualization (SEV) support
>> +#
>> +# @enabled: true if SEV is active
>> +#
>> +# @api-major: SEV API major version
>> +#
>> +# @api-minor: SEV API minor version
>> +#
>> +# @build-id: SEV FW build id
>> +#
>> +# @policy: SEV policy value
>> +#
>> +# @state: SEV guest state
>
> Is there a finite list of guest states?
>
Yes, the list is finite.
include/sysemu/sev.h defines the enum
typedef enum {
SEV_STATE_UNINIT = 0,
SEV_STATE_LUPDATE,
SEV_STATE_SECRET,
SEV_STATE_RUNNING,
SEV_STATE_SUPDATE,
SEV_STATE_RUPDATE,
SEV_STATE_MAX
}
>> +#
>> +# Since: 2.12
>> +##
>> +{ 'struct': 'SevInfo',
>> + 'data': { 'enabled': 'bool',
>> + 'api-major': 'uint8',
>> + 'api-minor' : 'uint8',
>> + 'build-id' : 'uint8',
>> + 'policy' : 'uint32',
>> + 'state' : 'str'
>
> If so, this should be an enum type listing those possible states,
> rather than an open-coded 'str' that can hold anything.
>
If the preference is to return enum, then I can convert the state to
return enum instead of string.
^ permalink raw reply [flat|nested] 77+ messages in thread
* [PATCH v8 14/28] hmp: add 'info sev' command
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:37 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
The command can be used to show the SEV information when memory
encryption is enabled on AMD platform.
Cc: "Daniel P. Berrangé" <berrange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
hmp-commands-info.hx | 14 ++++++++++++++
hmp.c | 19 +++++++++++++++++++
hmp.h | 1 +
3 files changed, 34 insertions(+)
diff --git a/hmp-commands-info.hx b/hmp-commands-info.hx
index ad590a4ffb2b..236811c465d2 100644
--- a/hmp-commands-info.hx
+++ b/hmp-commands-info.hx
@@ -865,6 +865,20 @@ STEXI
@findex info memory_size_summary
Display the amount of initially allocated and present hotpluggable (if
enabled) memory in bytes.
+ETEXI
+
+ {
+ .name = "sev",
+ .args_type = "",
+ .params = "",
+ .help = "show SEV information",
+ .cmd = hmp_info_sev,
+ },
+
+STEXI
+@item info sev
+@findex info sev
+Show SEV information.
ETEXI
STEXI
diff --git a/hmp.c b/hmp.c
index 7870d6a3004e..138bb8243207 100644
--- a/hmp.c
+++ b/hmp.c
@@ -2924,3 +2924,22 @@ void hmp_info_memory_size_summary(Monitor *mon, const QDict *qdict)
}
hmp_handle_error(mon, &err);
}
+
+void hmp_info_sev(Monitor *mon, const QDict *qdict)
+{
+ SevInfo *info;
+
+ info = qmp_query_sev(NULL);
+ monitor_printf(mon, "sev support: ");
+ monitor_printf(mon, "%s\n", info->enabled ? "enabled" : "disabled");
+
+ if (info->enabled) {
+ monitor_printf(mon, "state: %s\n", info->state);
+ monitor_printf(mon, "policy: 0x%x\n", info->policy);
+ monitor_printf(mon, "build id: %u\n", info->build_id);
+ monitor_printf(mon, "api version: %u.%u\n",
+ info->api_major, info->api_minor);
+ }
+
+ qapi_free_SevInfo(info);
+}
diff --git a/hmp.h b/hmp.h
index 1143db44a760..4ca1a77b2c1f 100644
--- a/hmp.h
+++ b/hmp.h
@@ -146,5 +146,6 @@ void hmp_info_ramblock(Monitor *mon, const QDict *qdict);
void hmp_hotpluggable_cpus(Monitor *mon, const QDict *qdict);
void hmp_info_vm_generation_id(Monitor *mon, const QDict *qdict);
void hmp_info_memory_size_summary(Monitor *mon, const QDict *qdict);
+void hmp_info_sev(Monitor *mon, const QDict *qdict);
#endif
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 14/28] hmp: add 'info sev' command
@ 2018-02-12 15:37 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh
The command can be used to show the SEV information when memory
encryption is enabled on AMD platform.
Cc: "Daniel P. Berrangé" <berrange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
hmp-commands-info.hx | 14 ++++++++++++++
hmp.c | 19 +++++++++++++++++++
hmp.h | 1 +
3 files changed, 34 insertions(+)
diff --git a/hmp-commands-info.hx b/hmp-commands-info.hx
index ad590a4ffb2b..236811c465d2 100644
--- a/hmp-commands-info.hx
+++ b/hmp-commands-info.hx
@@ -865,6 +865,20 @@ STEXI
@findex info memory_size_summary
Display the amount of initially allocated and present hotpluggable (if
enabled) memory in bytes.
+ETEXI
+
+ {
+ .name = "sev",
+ .args_type = "",
+ .params = "",
+ .help = "show SEV information",
+ .cmd = hmp_info_sev,
+ },
+
+STEXI
+@item info sev
+@findex info sev
+Show SEV information.
ETEXI
STEXI
diff --git a/hmp.c b/hmp.c
index 7870d6a3004e..138bb8243207 100644
--- a/hmp.c
+++ b/hmp.c
@@ -2924,3 +2924,22 @@ void hmp_info_memory_size_summary(Monitor *mon, const QDict *qdict)
}
hmp_handle_error(mon, &err);
}
+
+void hmp_info_sev(Monitor *mon, const QDict *qdict)
+{
+ SevInfo *info;
+
+ info = qmp_query_sev(NULL);
+ monitor_printf(mon, "sev support: ");
+ monitor_printf(mon, "%s\n", info->enabled ? "enabled" : "disabled");
+
+ if (info->enabled) {
+ monitor_printf(mon, "state: %s\n", info->state);
+ monitor_printf(mon, "policy: 0x%x\n", info->policy);
+ monitor_printf(mon, "build id: %u\n", info->build_id);
+ monitor_printf(mon, "api version: %u.%u\n",
+ info->api_major, info->api_minor);
+ }
+
+ qapi_free_SevInfo(info);
+}
diff --git a/hmp.h b/hmp.h
index 1143db44a760..4ca1a77b2c1f 100644
--- a/hmp.h
+++ b/hmp.h
@@ -146,5 +146,6 @@ void hmp_info_ramblock(Monitor *mon, const QDict *qdict);
void hmp_hotpluggable_cpus(Monitor *mon, const QDict *qdict);
void hmp_info_vm_generation_id(Monitor *mon, const QDict *qdict);
void hmp_info_memory_size_summary(Monitor *mon, const QDict *qdict);
+void hmp_info_sev(Monitor *mon, const QDict *qdict);
#endif
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread
* [PATCH v8 15/28] sev/i386: add command to create launch memory encryption context
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:37 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
The KVM_SEV_LAUNCH_START command creates a new VM encryption key (VEK).
The encryption key created with the command will be used for encrypting
the bootstrap images (such as guest bios).
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
include/sysemu/sev.h | 10 +++++
target/i386/sev.c | 99 ++++++++++++++++++++++++++++++++++++++++++++++++
target/i386/trace-events | 2 +
3 files changed, 111 insertions(+)
diff --git a/include/sysemu/sev.h b/include/sysemu/sev.h
index 121e7e4aa44c..08014a9c94ff 100644
--- a/include/sysemu/sev.h
+++ b/include/sysemu/sev.h
@@ -58,6 +58,16 @@ struct QSevGuestInfoClass {
ObjectClass parent_class;
};
+typedef enum {
+ SEV_STATE_UNINIT = 0,
+ SEV_STATE_LUPDATE,
+ SEV_STATE_SECRET,
+ SEV_STATE_RUNNING,
+ SEV_STATE_SUPDATE,
+ SEV_STATE_RUPDATE,
+ SEV_STATE_MAX
+} SevGuestState;
+
struct SEVState {
QSevGuestInfo *sev_info;
};
diff --git a/target/i386/sev.c b/target/i386/sev.c
index 2c4bbba3c367..2ecc6a1d1ad3 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -29,6 +29,17 @@ static int sev_fd;
#define SEV_FW_MAX_ERROR 0x17
+static SevGuestState current_sev_guest_state = SEV_STATE_UNINIT;
+
+static const char *const sev_state_str[] = {
+ "uninit",
+ "lupdate",
+ "secret",
+ "running",
+ "supdate",
+ "rupdate",
+};
+
static const char *const sev_fw_errlist[] = {
"",
"Platform state is invalid",
@@ -86,6 +97,16 @@ fw_error_to_str(int code)
return sev_fw_errlist[code];
}
+static void
+sev_set_guest_state(SevGuestState new_state)
+{
+ assert(new_state < SEV_STATE_MAX);
+
+ trace_kvm_sev_change_state(sev_state_str[current_sev_guest_state],
+ sev_state_str[new_state]);
+ current_sev_guest_state = new_state;
+}
+
static void
sev_ram_block_added(RAMBlockNotifier *n, void *host, size_t size)
{
@@ -337,6 +358,7 @@ sev_get_me_mask(void)
void
sev_get_current_state(char **state)
{
+ *state = g_strdup(sev_state_str[current_sev_guest_state]);
}
bool
@@ -355,6 +377,76 @@ sev_get_policy(uint32_t *policy)
{
}
+static int
+sev_read_file_base64(const char *filename, guchar **data, gsize *len)
+{
+ gsize sz;
+ gchar *base64;
+ GError *error = NULL;
+
+ if (!g_file_get_contents(filename, &base64, &sz, &error)) {
+ error_report("failed to read '%s' (%s)", filename, error->message);
+ return -1;
+ }
+
+ *data = g_base64_decode(base64, len);
+ return 0;
+}
+
+static int
+sev_launch_start(SEVState *s)
+{
+ gsize sz;
+ int ret = 1;
+ int fw_error;
+ QSevGuestInfo *sev = s->sev_info;
+ struct kvm_sev_launch_start *start;
+ guchar *session = NULL, *dh_cert = NULL;
+
+ start = g_malloc0(sizeof(*start));
+ if (!start) {
+ return 1;
+ }
+
+ start->handle = object_property_get_int(OBJECT(sev), "handle",
+ &error_abort);
+ start->policy = object_property_get_int(OBJECT(sev), "policy",
+ &error_abort);
+ if (sev->session_file) {
+ if (sev_read_file_base64(sev->session_file, &session, &sz) < 0) {
+ return 1;
+ }
+ start->session_uaddr = (unsigned long)session;
+ start->session_len = sz;
+ }
+
+ if (sev->dh_cert_file) {
+ if (sev_read_file_base64(sev->dh_cert_file, &dh_cert, &sz) < 0) {
+ return 1;
+ }
+ start->dh_uaddr = (unsigned long)dh_cert;
+ start->dh_len = sz;
+ }
+
+ trace_kvm_sev_launch_start(start->policy, session, dh_cert);
+ ret = sev_ioctl(KVM_SEV_LAUNCH_START, start, &fw_error);
+ if (ret < 0) {
+ error_report("%s: LAUNCH_START ret=%d fw_error=%d '%s'",
+ __func__, ret, fw_error, fw_error_to_str(fw_error));
+ return 1;
+ }
+
+ object_property_set_int(OBJECT(sev), start->handle, "handle",
+ &error_abort);
+ sev_set_guest_state(SEV_STATE_LUPDATE);
+
+ g_free(start);
+ g_free(session);
+ g_free(dh_cert);
+
+ return 0;
+}
+
void *
sev_guest_init(const char *id)
{
@@ -398,6 +490,13 @@ sev_guest_init(const char *id)
goto err;
}
+ ret = sev_launch_start(s);
+ if (ret) {
+ error_report("%s: failed to create encryption context", __func__);
+ goto err;
+ }
+
+
sev_active = true;
ram_block_notifier_add(&sev_ram_notifier);
diff --git a/target/i386/trace-events b/target/i386/trace-events
index ffa3d2250425..9402251e9991 100644
--- a/target/i386/trace-events
+++ b/target/i386/trace-events
@@ -10,3 +10,5 @@ kvm_x86_update_msi_routes(int num) "Updated %d MSI routes"
kvm_sev_init(void) ""
kvm_memcrypt_register_region(void *addr, size_t len) "addr %p len 0x%lu"
kvm_memcrypt_unregister_region(void *addr, size_t len) "addr %p len 0x%lu"
+kvm_sev_change_state(const char *old, const char *new) "%s -> %s"
+kvm_sev_launch_start(int policy, void *session, void *pdh) "policy 0x%x session %p pdh %p"
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 15/28] sev/i386: add command to create launch memory encryption context
@ 2018-02-12 15:37 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh, Richard Henderson
The KVM_SEV_LAUNCH_START command creates a new VM encryption key (VEK).
The encryption key created with the command will be used for encrypting
the bootstrap images (such as guest bios).
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
include/sysemu/sev.h | 10 +++++
target/i386/sev.c | 99 ++++++++++++++++++++++++++++++++++++++++++++++++
target/i386/trace-events | 2 +
3 files changed, 111 insertions(+)
diff --git a/include/sysemu/sev.h b/include/sysemu/sev.h
index 121e7e4aa44c..08014a9c94ff 100644
--- a/include/sysemu/sev.h
+++ b/include/sysemu/sev.h
@@ -58,6 +58,16 @@ struct QSevGuestInfoClass {
ObjectClass parent_class;
};
+typedef enum {
+ SEV_STATE_UNINIT = 0,
+ SEV_STATE_LUPDATE,
+ SEV_STATE_SECRET,
+ SEV_STATE_RUNNING,
+ SEV_STATE_SUPDATE,
+ SEV_STATE_RUPDATE,
+ SEV_STATE_MAX
+} SevGuestState;
+
struct SEVState {
QSevGuestInfo *sev_info;
};
diff --git a/target/i386/sev.c b/target/i386/sev.c
index 2c4bbba3c367..2ecc6a1d1ad3 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -29,6 +29,17 @@ static int sev_fd;
#define SEV_FW_MAX_ERROR 0x17
+static SevGuestState current_sev_guest_state = SEV_STATE_UNINIT;
+
+static const char *const sev_state_str[] = {
+ "uninit",
+ "lupdate",
+ "secret",
+ "running",
+ "supdate",
+ "rupdate",
+};
+
static const char *const sev_fw_errlist[] = {
"",
"Platform state is invalid",
@@ -86,6 +97,16 @@ fw_error_to_str(int code)
return sev_fw_errlist[code];
}
+static void
+sev_set_guest_state(SevGuestState new_state)
+{
+ assert(new_state < SEV_STATE_MAX);
+
+ trace_kvm_sev_change_state(sev_state_str[current_sev_guest_state],
+ sev_state_str[new_state]);
+ current_sev_guest_state = new_state;
+}
+
static void
sev_ram_block_added(RAMBlockNotifier *n, void *host, size_t size)
{
@@ -337,6 +358,7 @@ sev_get_me_mask(void)
void
sev_get_current_state(char **state)
{
+ *state = g_strdup(sev_state_str[current_sev_guest_state]);
}
bool
@@ -355,6 +377,76 @@ sev_get_policy(uint32_t *policy)
{
}
+static int
+sev_read_file_base64(const char *filename, guchar **data, gsize *len)
+{
+ gsize sz;
+ gchar *base64;
+ GError *error = NULL;
+
+ if (!g_file_get_contents(filename, &base64, &sz, &error)) {
+ error_report("failed to read '%s' (%s)", filename, error->message);
+ return -1;
+ }
+
+ *data = g_base64_decode(base64, len);
+ return 0;
+}
+
+static int
+sev_launch_start(SEVState *s)
+{
+ gsize sz;
+ int ret = 1;
+ int fw_error;
+ QSevGuestInfo *sev = s->sev_info;
+ struct kvm_sev_launch_start *start;
+ guchar *session = NULL, *dh_cert = NULL;
+
+ start = g_malloc0(sizeof(*start));
+ if (!start) {
+ return 1;
+ }
+
+ start->handle = object_property_get_int(OBJECT(sev), "handle",
+ &error_abort);
+ start->policy = object_property_get_int(OBJECT(sev), "policy",
+ &error_abort);
+ if (sev->session_file) {
+ if (sev_read_file_base64(sev->session_file, &session, &sz) < 0) {
+ return 1;
+ }
+ start->session_uaddr = (unsigned long)session;
+ start->session_len = sz;
+ }
+
+ if (sev->dh_cert_file) {
+ if (sev_read_file_base64(sev->dh_cert_file, &dh_cert, &sz) < 0) {
+ return 1;
+ }
+ start->dh_uaddr = (unsigned long)dh_cert;
+ start->dh_len = sz;
+ }
+
+ trace_kvm_sev_launch_start(start->policy, session, dh_cert);
+ ret = sev_ioctl(KVM_SEV_LAUNCH_START, start, &fw_error);
+ if (ret < 0) {
+ error_report("%s: LAUNCH_START ret=%d fw_error=%d '%s'",
+ __func__, ret, fw_error, fw_error_to_str(fw_error));
+ return 1;
+ }
+
+ object_property_set_int(OBJECT(sev), start->handle, "handle",
+ &error_abort);
+ sev_set_guest_state(SEV_STATE_LUPDATE);
+
+ g_free(start);
+ g_free(session);
+ g_free(dh_cert);
+
+ return 0;
+}
+
void *
sev_guest_init(const char *id)
{
@@ -398,6 +490,13 @@ sev_guest_init(const char *id)
goto err;
}
+ ret = sev_launch_start(s);
+ if (ret) {
+ error_report("%s: failed to create encryption context", __func__);
+ goto err;
+ }
+
+
sev_active = true;
ram_block_notifier_add(&sev_ram_notifier);
diff --git a/target/i386/trace-events b/target/i386/trace-events
index ffa3d2250425..9402251e9991 100644
--- a/target/i386/trace-events
+++ b/target/i386/trace-events
@@ -10,3 +10,5 @@ kvm_x86_update_msi_routes(int num) "Updated %d MSI routes"
kvm_sev_init(void) ""
kvm_memcrypt_register_region(void *addr, size_t len) "addr %p len 0x%lu"
kvm_memcrypt_unregister_region(void *addr, size_t len) "addr %p len 0x%lu"
+kvm_sev_change_state(const char *old, const char *new) "%s -> %s"
+kvm_sev_launch_start(int policy, void *session, void *pdh) "policy 0x%x session %p pdh %p"
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread
* [PATCH v8 16/28] sev/i386: add command to encrypt guest memory region
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:37 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
The KVM_SEV_LAUNCH_UPDATE_DATA command is used to encrypt a guest memory
region using the VM Encryption Key created using LAUNCH_START.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
accel/kvm/kvm-all.c | 2 ++
include/sysemu/sev.h | 1 +
stubs/sev.c | 5 +++++
target/i386/sev.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++++
target/i386/trace-events | 1 +
5 files changed, 58 insertions(+)
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 4468c8fe002c..4974c00c46fb 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -1679,6 +1679,8 @@ static int kvm_init(MachineState *ms)
if (!kvm_state->memcrypt_handle) {
goto err;
}
+
+ kvm_state->memcrypt_encrypt_data = sev_encrypt_data;
}
ret = kvm_arch_init(ms, s);
diff --git a/include/sysemu/sev.h b/include/sysemu/sev.h
index 08014a9c94ff..f7af1a00c510 100644
--- a/include/sysemu/sev.h
+++ b/include/sysemu/sev.h
@@ -75,6 +75,7 @@ struct SEVState {
typedef struct SEVState SEVState;
void *sev_guest_init(const char *id);
+int sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len);
#endif
diff --git a/stubs/sev.c b/stubs/sev.c
index e3076f009a48..8725e6d4e1ec 100644
--- a/stubs/sev.c
+++ b/stubs/sev.c
@@ -15,6 +15,11 @@
#include "qemu-common.h"
#include "sysemu/sev.h"
+int sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len)
+{
+ return 1;
+}
+
void sev_get_current_state(char **state)
{
}
diff --git a/target/i386/sev.c b/target/i386/sev.c
index 2ecc6a1d1ad3..4414bda25509 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -97,6 +97,12 @@ fw_error_to_str(int code)
return sev_fw_errlist[code];
}
+static bool
+sev_check_state(SevGuestState state)
+{
+ return current_sev_guest_state == state ? true : false;
+}
+
static void
sev_set_guest_state(SevGuestState new_state)
{
@@ -447,6 +453,36 @@ sev_launch_start(SEVState *s)
return 0;
}
+static int
+sev_launch_update_data(uint8_t *addr, uint64_t len)
+{
+ int ret, fw_error;
+ struct kvm_sev_launch_update_data *update;
+
+ if (addr == NULL || len <= 0) {
+ return 1;
+ }
+
+ update = g_malloc0(sizeof(*update));
+ if (!update) {
+ return 1;
+ }
+
+ update->uaddr = (__u64)addr;
+ update->len = len;
+ trace_kvm_sev_launch_update_data(addr, len);
+ ret = sev_ioctl(KVM_SEV_LAUNCH_UPDATE_DATA, update, &fw_error);
+ if (ret) {
+ error_report("%s: LAUNCH_UPDATE ret=%d fw_error=%d '%s'",
+ __func__, ret, fw_error, fw_error_to_str(fw_error));
+ goto err;
+ }
+
+err:
+ g_free(update);
+ return ret;
+}
+
void *
sev_guest_init(const char *id)
{
@@ -506,6 +542,19 @@ err:
return NULL;
}
+int
+sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len)
+{
+ assert(handle);
+
+ /* if SEV is in update state then encrypt the data else do nothing */
+ if (sev_check_state(SEV_STATE_LUPDATE)) {
+ return sev_launch_update_data(ptr, len);
+ }
+
+ return 0;
+}
+
static void
sev_register_types(void)
{
diff --git a/target/i386/trace-events b/target/i386/trace-events
index 9402251e9991..c0cd8e93217f 100644
--- a/target/i386/trace-events
+++ b/target/i386/trace-events
@@ -12,3 +12,4 @@ kvm_memcrypt_register_region(void *addr, size_t len) "addr %p len 0x%lu"
kvm_memcrypt_unregister_region(void *addr, size_t len) "addr %p len 0x%lu"
kvm_sev_change_state(const char *old, const char *new) "%s -> %s"
kvm_sev_launch_start(int policy, void *session, void *pdh) "policy 0x%x session %p pdh %p"
+kvm_sev_launch_update_data(void *addr, uint64_t len) "addr %p len 0x%" PRIu64
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 16/28] sev/i386: add command to encrypt guest memory region
@ 2018-02-12 15:37 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh, Richard Henderson
The KVM_SEV_LAUNCH_UPDATE_DATA command is used to encrypt a guest memory
region using the VM Encryption Key created using LAUNCH_START.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
accel/kvm/kvm-all.c | 2 ++
include/sysemu/sev.h | 1 +
stubs/sev.c | 5 +++++
target/i386/sev.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++++
target/i386/trace-events | 1 +
5 files changed, 58 insertions(+)
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 4468c8fe002c..4974c00c46fb 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -1679,6 +1679,8 @@ static int kvm_init(MachineState *ms)
if (!kvm_state->memcrypt_handle) {
goto err;
}
+
+ kvm_state->memcrypt_encrypt_data = sev_encrypt_data;
}
ret = kvm_arch_init(ms, s);
diff --git a/include/sysemu/sev.h b/include/sysemu/sev.h
index 08014a9c94ff..f7af1a00c510 100644
--- a/include/sysemu/sev.h
+++ b/include/sysemu/sev.h
@@ -75,6 +75,7 @@ struct SEVState {
typedef struct SEVState SEVState;
void *sev_guest_init(const char *id);
+int sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len);
#endif
diff --git a/stubs/sev.c b/stubs/sev.c
index e3076f009a48..8725e6d4e1ec 100644
--- a/stubs/sev.c
+++ b/stubs/sev.c
@@ -15,6 +15,11 @@
#include "qemu-common.h"
#include "sysemu/sev.h"
+int sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len)
+{
+ return 1;
+}
+
void sev_get_current_state(char **state)
{
}
diff --git a/target/i386/sev.c b/target/i386/sev.c
index 2ecc6a1d1ad3..4414bda25509 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -97,6 +97,12 @@ fw_error_to_str(int code)
return sev_fw_errlist[code];
}
+static bool
+sev_check_state(SevGuestState state)
+{
+ return current_sev_guest_state == state ? true : false;
+}
+
static void
sev_set_guest_state(SevGuestState new_state)
{
@@ -447,6 +453,36 @@ sev_launch_start(SEVState *s)
return 0;
}
+static int
+sev_launch_update_data(uint8_t *addr, uint64_t len)
+{
+ int ret, fw_error;
+ struct kvm_sev_launch_update_data *update;
+
+ if (addr == NULL || len <= 0) {
+ return 1;
+ }
+
+ update = g_malloc0(sizeof(*update));
+ if (!update) {
+ return 1;
+ }
+
+ update->uaddr = (__u64)addr;
+ update->len = len;
+ trace_kvm_sev_launch_update_data(addr, len);
+ ret = sev_ioctl(KVM_SEV_LAUNCH_UPDATE_DATA, update, &fw_error);
+ if (ret) {
+ error_report("%s: LAUNCH_UPDATE ret=%d fw_error=%d '%s'",
+ __func__, ret, fw_error, fw_error_to_str(fw_error));
+ goto err;
+ }
+
+err:
+ g_free(update);
+ return ret;
+}
+
void *
sev_guest_init(const char *id)
{
@@ -506,6 +542,19 @@ err:
return NULL;
}
+int
+sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len)
+{
+ assert(handle);
+
+ /* if SEV is in update state then encrypt the data else do nothing */
+ if (sev_check_state(SEV_STATE_LUPDATE)) {
+ return sev_launch_update_data(ptr, len);
+ }
+
+ return 0;
+}
+
static void
sev_register_types(void)
{
diff --git a/target/i386/trace-events b/target/i386/trace-events
index 9402251e9991..c0cd8e93217f 100644
--- a/target/i386/trace-events
+++ b/target/i386/trace-events
@@ -12,3 +12,4 @@ kvm_memcrypt_register_region(void *addr, size_t len) "addr %p len 0x%lu"
kvm_memcrypt_unregister_region(void *addr, size_t len) "addr %p len 0x%lu"
kvm_sev_change_state(const char *old, const char *new) "%s -> %s"
kvm_sev_launch_start(int policy, void *session, void *pdh) "policy 0x%x session %p pdh %p"
+kvm_sev_launch_update_data(void *addr, uint64_t len) "addr %p len 0x%" PRIu64
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread
* [PATCH v8 17/28] target/i386: encrypt bios rom
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:37 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
SEV requires that guest bios must be encrypted before booting the guest.
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
hw/i386/pc_sysfw.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/hw/i386/pc_sysfw.c b/hw/i386/pc_sysfw.c
index 4325575e7d82..73ac783f2055 100644
--- a/hw/i386/pc_sysfw.c
+++ b/hw/i386/pc_sysfw.c
@@ -113,6 +113,8 @@ static void pc_system_flash_init(MemoryRegion *rom_memory)
pflash_t *system_flash;
MemoryRegion *flash_mem;
char name[64];
+ void *flash_ptr;
+ int ret, flash_size;
sector_bits = 12;
sector_size = 1 << sector_bits;
@@ -169,6 +171,17 @@ static void pc_system_flash_init(MemoryRegion *rom_memory)
if (unit == 0) {
flash_mem = pflash_cfi01_get_memory(system_flash);
pc_isa_bios_init(rom_memory, flash_mem, size);
+
+ /* Encrypt the pflash boot ROM */
+ if (kvm_memcrypt_enabled()) {
+ flash_ptr = memory_region_get_ram_ptr(flash_mem);
+ flash_size = memory_region_size(flash_mem);
+ ret = kvm_memcrypt_encrypt_data(flash_ptr, flash_size);
+ if (ret) {
+ error_report("failed to encrypt pflash rom");
+ exit(1);
+ }
+ }
}
}
}
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 17/28] target/i386: encrypt bios rom
@ 2018-02-12 15:37 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh, Richard Henderson
SEV requires that guest bios must be encrypted before booting the guest.
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
hw/i386/pc_sysfw.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/hw/i386/pc_sysfw.c b/hw/i386/pc_sysfw.c
index 4325575e7d82..73ac783f2055 100644
--- a/hw/i386/pc_sysfw.c
+++ b/hw/i386/pc_sysfw.c
@@ -113,6 +113,8 @@ static void pc_system_flash_init(MemoryRegion *rom_memory)
pflash_t *system_flash;
MemoryRegion *flash_mem;
char name[64];
+ void *flash_ptr;
+ int ret, flash_size;
sector_bits = 12;
sector_size = 1 << sector_bits;
@@ -169,6 +171,17 @@ static void pc_system_flash_init(MemoryRegion *rom_memory)
if (unit == 0) {
flash_mem = pflash_cfi01_get_memory(system_flash);
pc_isa_bios_init(rom_memory, flash_mem, size);
+
+ /* Encrypt the pflash boot ROM */
+ if (kvm_memcrypt_enabled()) {
+ flash_ptr = memory_region_get_ram_ptr(flash_mem);
+ flash_size = memory_region_size(flash_mem);
+ ret = kvm_memcrypt_encrypt_data(flash_ptr, flash_size);
+ if (ret) {
+ error_report("failed to encrypt pflash rom");
+ exit(1);
+ }
+ }
}
}
}
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread
* [PATCH v8 18/28] sev/i386: add support to LAUNCH_MEASURE command
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:37 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
During machine creation we encrypted the guest bios image, the
LAUNCH_MEASURE command can be used to retrieve the measurement of
the encrypted memory region. This measurement is a signature of
the memory contents that can be sent to the guest owner as an
attestation that the memory was encrypted correctly by the firmware.
VM management tools like libvirt can query the measurement using
query-sev-launch-measure QMP command.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
include/sysemu/sev.h | 2 ++
stubs/sev.c | 5 ++++
target/i386/sev.c | 68 ++++++++++++++++++++++++++++++++++++++++++++++++
target/i386/trace-events | 1 +
4 files changed, 76 insertions(+)
diff --git a/include/sysemu/sev.h b/include/sysemu/sev.h
index f7af1a00c510..c173ad33f8bb 100644
--- a/include/sysemu/sev.h
+++ b/include/sysemu/sev.h
@@ -30,6 +30,7 @@ extern uint64_t sev_get_me_mask(void);
extern void sev_get_current_state(char **state);
extern void sev_get_fw_version(uint8_t *major, uint8_t *minor, uint8_t *build);
extern void sev_get_policy(uint32_t *policy);
+extern char *sev_get_launch_measurement(void);
typedef struct QSevGuestInfo QSevGuestInfo;
typedef struct QSevGuestInfoClass QSevGuestInfoClass;
@@ -70,6 +71,7 @@ typedef enum {
struct SEVState {
QSevGuestInfo *sev_info;
+ gchar *measurement;
};
typedef struct SEVState SEVState;
diff --git a/stubs/sev.c b/stubs/sev.c
index 8725e6d4e1ec..1e26a1bea8b7 100644
--- a/stubs/sev.c
+++ b/stubs/sev.c
@@ -46,3 +46,8 @@ void sev_get_fw_version(uint8_t *major, uint8_t *minor, uint8_t *build)
void sev_get_policy(uint32_t *policy)
{
}
+
+char *sev_get_launch_measurement(void)
+{
+ return NULL;
+}
diff --git a/target/i386/sev.c b/target/i386/sev.c
index 4414bda25509..c7a966f2356e 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -19,6 +19,7 @@
#include "sysemu/sev.h"
#include "sysemu/sysemu.h"
#include "trace.h"
+#include "qapi-event.h"
#define DEFAULT_GUEST_POLICY 0x1 /* disable debug */
#define DEFAULT_SEV_DEVICE "/dev/sev"
@@ -26,6 +27,7 @@
static uint64_t me_mask;
static bool sev_active;
static int sev_fd;
+static SEVState *sev_state;
#define SEV_FW_MAX_ERROR 0x17
@@ -483,6 +485,69 @@ err:
return ret;
}
+static void
+sev_launch_get_measure(Notifier *notifier, void *unused)
+{
+ int ret, error;
+ guchar *data;
+ SEVState *s = sev_state;
+ struct kvm_sev_launch_measure *measurement;
+
+ if (!sev_check_state(SEV_STATE_LUPDATE)) {
+ return;
+ }
+
+ measurement = g_malloc0(sizeof(*measurement));
+ if (!measurement) {
+ return;
+ }
+
+ /* query the measurement blob length */
+ ret = sev_ioctl(KVM_SEV_LAUNCH_MEASURE, measurement, &error);
+ if (!measurement->len) {
+ error_report("%s: LAUNCH_MEASURE ret=%d fw_error=%d '%s'",
+ __func__, ret, error, fw_error_to_str(errno));
+ goto free_measurement;
+ }
+
+ data = g_malloc(measurement->len);
+ if (s->measurement) {
+ goto free_data;
+ }
+
+ measurement->uaddr = (unsigned long)data;
+
+ /* get the measurement blob */
+ ret = sev_ioctl(KVM_SEV_LAUNCH_MEASURE, measurement, &error);
+ if (ret) {
+ error_report("%s: LAUNCH_MEASURE ret=%d fw_error=%d '%s'",
+ __func__, ret, error, fw_error_to_str(errno));
+ goto free_data;
+ }
+
+ sev_set_guest_state(SEV_STATE_SECRET);
+
+ /* encode the measurement value and emit the event */
+ s->measurement = g_base64_encode(data, measurement->len);
+ trace_kvm_sev_launch_measurement(s->measurement);
+
+free_data:
+ g_free(data);
+free_measurement:
+ g_free(measurement);
+}
+
+char *
+sev_get_launch_measurement(void)
+{
+ return current_sev_guest_state >= SEV_STATE_SECRET ?
+ g_strdup(sev_state->measurement) : NULL;
+}
+
+static Notifier sev_machine_done_notify = {
+ .notify = sev_launch_get_measure,
+};
+
void *
sev_guest_init(const char *id)
{
@@ -535,6 +600,9 @@ sev_guest_init(const char *id)
sev_active = true;
ram_block_notifier_add(&sev_ram_notifier);
+ qemu_add_machine_init_done_notifier(&sev_machine_done_notify);
+
+ sev_state = s;
return s;
err:
diff --git a/target/i386/trace-events b/target/i386/trace-events
index c0cd8e93217f..f7a1a1e6b85c 100644
--- a/target/i386/trace-events
+++ b/target/i386/trace-events
@@ -13,3 +13,4 @@ kvm_memcrypt_unregister_region(void *addr, size_t len) "addr %p len 0x%lu"
kvm_sev_change_state(const char *old, const char *new) "%s -> %s"
kvm_sev_launch_start(int policy, void *session, void *pdh) "policy 0x%x session %p pdh %p"
kvm_sev_launch_update_data(void *addr, uint64_t len) "addr %p len 0x%" PRIu64
+kvm_sev_launch_measurement(const char *value) "data %s"
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 18/28] sev/i386: add support to LAUNCH_MEASURE command
@ 2018-02-12 15:37 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh, Richard Henderson
During machine creation we encrypted the guest bios image, the
LAUNCH_MEASURE command can be used to retrieve the measurement of
the encrypted memory region. This measurement is a signature of
the memory contents that can be sent to the guest owner as an
attestation that the memory was encrypted correctly by the firmware.
VM management tools like libvirt can query the measurement using
query-sev-launch-measure QMP command.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
include/sysemu/sev.h | 2 ++
stubs/sev.c | 5 ++++
target/i386/sev.c | 68 ++++++++++++++++++++++++++++++++++++++++++++++++
target/i386/trace-events | 1 +
4 files changed, 76 insertions(+)
diff --git a/include/sysemu/sev.h b/include/sysemu/sev.h
index f7af1a00c510..c173ad33f8bb 100644
--- a/include/sysemu/sev.h
+++ b/include/sysemu/sev.h
@@ -30,6 +30,7 @@ extern uint64_t sev_get_me_mask(void);
extern void sev_get_current_state(char **state);
extern void sev_get_fw_version(uint8_t *major, uint8_t *minor, uint8_t *build);
extern void sev_get_policy(uint32_t *policy);
+extern char *sev_get_launch_measurement(void);
typedef struct QSevGuestInfo QSevGuestInfo;
typedef struct QSevGuestInfoClass QSevGuestInfoClass;
@@ -70,6 +71,7 @@ typedef enum {
struct SEVState {
QSevGuestInfo *sev_info;
+ gchar *measurement;
};
typedef struct SEVState SEVState;
diff --git a/stubs/sev.c b/stubs/sev.c
index 8725e6d4e1ec..1e26a1bea8b7 100644
--- a/stubs/sev.c
+++ b/stubs/sev.c
@@ -46,3 +46,8 @@ void sev_get_fw_version(uint8_t *major, uint8_t *minor, uint8_t *build)
void sev_get_policy(uint32_t *policy)
{
}
+
+char *sev_get_launch_measurement(void)
+{
+ return NULL;
+}
diff --git a/target/i386/sev.c b/target/i386/sev.c
index 4414bda25509..c7a966f2356e 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -19,6 +19,7 @@
#include "sysemu/sev.h"
#include "sysemu/sysemu.h"
#include "trace.h"
+#include "qapi-event.h"
#define DEFAULT_GUEST_POLICY 0x1 /* disable debug */
#define DEFAULT_SEV_DEVICE "/dev/sev"
@@ -26,6 +27,7 @@
static uint64_t me_mask;
static bool sev_active;
static int sev_fd;
+static SEVState *sev_state;
#define SEV_FW_MAX_ERROR 0x17
@@ -483,6 +485,69 @@ err:
return ret;
}
+static void
+sev_launch_get_measure(Notifier *notifier, void *unused)
+{
+ int ret, error;
+ guchar *data;
+ SEVState *s = sev_state;
+ struct kvm_sev_launch_measure *measurement;
+
+ if (!sev_check_state(SEV_STATE_LUPDATE)) {
+ return;
+ }
+
+ measurement = g_malloc0(sizeof(*measurement));
+ if (!measurement) {
+ return;
+ }
+
+ /* query the measurement blob length */
+ ret = sev_ioctl(KVM_SEV_LAUNCH_MEASURE, measurement, &error);
+ if (!measurement->len) {
+ error_report("%s: LAUNCH_MEASURE ret=%d fw_error=%d '%s'",
+ __func__, ret, error, fw_error_to_str(errno));
+ goto free_measurement;
+ }
+
+ data = g_malloc(measurement->len);
+ if (s->measurement) {
+ goto free_data;
+ }
+
+ measurement->uaddr = (unsigned long)data;
+
+ /* get the measurement blob */
+ ret = sev_ioctl(KVM_SEV_LAUNCH_MEASURE, measurement, &error);
+ if (ret) {
+ error_report("%s: LAUNCH_MEASURE ret=%d fw_error=%d '%s'",
+ __func__, ret, error, fw_error_to_str(errno));
+ goto free_data;
+ }
+
+ sev_set_guest_state(SEV_STATE_SECRET);
+
+ /* encode the measurement value and emit the event */
+ s->measurement = g_base64_encode(data, measurement->len);
+ trace_kvm_sev_launch_measurement(s->measurement);
+
+free_data:
+ g_free(data);
+free_measurement:
+ g_free(measurement);
+}
+
+char *
+sev_get_launch_measurement(void)
+{
+ return current_sev_guest_state >= SEV_STATE_SECRET ?
+ g_strdup(sev_state->measurement) : NULL;
+}
+
+static Notifier sev_machine_done_notify = {
+ .notify = sev_launch_get_measure,
+};
+
void *
sev_guest_init(const char *id)
{
@@ -535,6 +600,9 @@ sev_guest_init(const char *id)
sev_active = true;
ram_block_notifier_add(&sev_ram_notifier);
+ qemu_add_machine_init_done_notifier(&sev_machine_done_notify);
+
+ sev_state = s;
return s;
err:
diff --git a/target/i386/trace-events b/target/i386/trace-events
index c0cd8e93217f..f7a1a1e6b85c 100644
--- a/target/i386/trace-events
+++ b/target/i386/trace-events
@@ -13,3 +13,4 @@ kvm_memcrypt_unregister_region(void *addr, size_t len) "addr %p len 0x%lu"
kvm_sev_change_state(const char *old, const char *new) "%s -> %s"
kvm_sev_launch_start(int policy, void *session, void *pdh) "policy 0x%x session %p pdh %p"
kvm_sev_launch_update_data(void *addr, uint64_t len) "addr %p len 0x%" PRIu64
+kvm_sev_launch_measurement(const char *value) "data %s"
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread
* [PATCH v8 19/28] sev/i386: finalize the SEV guest launch flow
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:37 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
SEV launch flow requires us to issue LAUNCH_FINISH command before guest
is ready to run.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
target/i386/sev.c | 29 +++++++++++++++++++++++++++++
target/i386/trace-events | 1 +
2 files changed, 30 insertions(+)
diff --git a/target/i386/sev.c b/target/i386/sev.c
index c7a966f2356e..eda64df4cfa5 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -548,6 +548,34 @@ static Notifier sev_machine_done_notify = {
.notify = sev_launch_get_measure,
};
+static void
+sev_launch_finish(SEVState *s)
+{
+ int ret, error;
+
+ trace_kvm_sev_launch_finish();
+ ret = sev_ioctl(KVM_SEV_LAUNCH_FINISH, 0, &error);
+ if (ret) {
+ error_report("%s: LAUNCH_FINISH ret=%d fw_error=%d '%s'",
+ __func__, ret, error, fw_error_to_str(error));
+ exit(1);
+ }
+
+ sev_set_guest_state(SEV_STATE_RUNNING);
+}
+
+static void
+sev_vm_state_change(void *opaque, int running, RunState state)
+{
+ SEVState *s = opaque;
+
+ if (running) {
+ if (!sev_check_state(SEV_STATE_RUNNING)) {
+ sev_launch_finish(s);
+ }
+ }
+}
+
void *
sev_guest_init(const char *id)
{
@@ -601,6 +629,7 @@ sev_guest_init(const char *id)
sev_active = true;
ram_block_notifier_add(&sev_ram_notifier);
qemu_add_machine_init_done_notifier(&sev_machine_done_notify);
+ qemu_add_vm_change_state_handler(sev_vm_state_change, s);
sev_state = s;
diff --git a/target/i386/trace-events b/target/i386/trace-events
index f7a1a1e6b85c..b1fbde6e40fe 100644
--- a/target/i386/trace-events
+++ b/target/i386/trace-events
@@ -14,3 +14,4 @@ kvm_sev_change_state(const char *old, const char *new) "%s -> %s"
kvm_sev_launch_start(int policy, void *session, void *pdh) "policy 0x%x session %p pdh %p"
kvm_sev_launch_update_data(void *addr, uint64_t len) "addr %p len 0x%" PRIu64
kvm_sev_launch_measurement(const char *value) "data %s"
+kvm_sev_launch_finish(void) ""
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 19/28] sev/i386: finalize the SEV guest launch flow
@ 2018-02-12 15:37 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh, Richard Henderson
SEV launch flow requires us to issue LAUNCH_FINISH command before guest
is ready to run.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
target/i386/sev.c | 29 +++++++++++++++++++++++++++++
target/i386/trace-events | 1 +
2 files changed, 30 insertions(+)
diff --git a/target/i386/sev.c b/target/i386/sev.c
index c7a966f2356e..eda64df4cfa5 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -548,6 +548,34 @@ static Notifier sev_machine_done_notify = {
.notify = sev_launch_get_measure,
};
+static void
+sev_launch_finish(SEVState *s)
+{
+ int ret, error;
+
+ trace_kvm_sev_launch_finish();
+ ret = sev_ioctl(KVM_SEV_LAUNCH_FINISH, 0, &error);
+ if (ret) {
+ error_report("%s: LAUNCH_FINISH ret=%d fw_error=%d '%s'",
+ __func__, ret, error, fw_error_to_str(error));
+ exit(1);
+ }
+
+ sev_set_guest_state(SEV_STATE_RUNNING);
+}
+
+static void
+sev_vm_state_change(void *opaque, int running, RunState state)
+{
+ SEVState *s = opaque;
+
+ if (running) {
+ if (!sev_check_state(SEV_STATE_RUNNING)) {
+ sev_launch_finish(s);
+ }
+ }
+}
+
void *
sev_guest_init(const char *id)
{
@@ -601,6 +629,7 @@ sev_guest_init(const char *id)
sev_active = true;
ram_block_notifier_add(&sev_ram_notifier);
qemu_add_machine_init_done_notifier(&sev_machine_done_notify);
+ qemu_add_vm_change_state_handler(sev_vm_state_change, s);
sev_state = s;
diff --git a/target/i386/trace-events b/target/i386/trace-events
index f7a1a1e6b85c..b1fbde6e40fe 100644
--- a/target/i386/trace-events
+++ b/target/i386/trace-events
@@ -14,3 +14,4 @@ kvm_sev_change_state(const char *old, const char *new) "%s -> %s"
kvm_sev_launch_start(int policy, void *session, void *pdh) "policy 0x%x session %p pdh %p"
kvm_sev_launch_update_data(void *addr, uint64_t len) "addr %p len 0x%" PRIu64
kvm_sev_launch_measurement(const char *value) "data %s"
+kvm_sev_launch_finish(void) ""
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread
* [PATCH v8 20/28] hw/i386: set ram_debug_ops when memory encryption is enabled
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:37 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
When memory encryption is enabled, the guest RAM and boot flash ROM will
contain the encrypted data. By setting the debug ops allow us to invoke
encryption APIs when accessing the memory for the debug purposes.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
hw/i386/pc.c | 9 +++++++++
hw/i386/pc_sysfw.c | 6 ++++++
2 files changed, 15 insertions(+)
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 55e69d66fe6f..53ddecef369c 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1360,6 +1360,15 @@ void pc_memory_init(PCMachineState *pcms,
e820_add_entry(0x100000000ULL, pcms->above_4g_mem_size, E820_RAM);
}
+ /*
+ * When memory encryption is enabled, the guest RAM will be encrypted with
+ * a guest unique key. Set the debug ops so that any debug access to the
+ * guest RAM will go through the memory encryption APIs.
+ */
+ if (kvm_memcrypt_enabled()) {
+ kvm_memcrypt_set_debug_ops(ram);
+ }
+
if (!pcmc->has_reserved_memory &&
(machine->ram_slots ||
(machine->maxram_size > machine->ram_size))) {
diff --git a/hw/i386/pc_sysfw.c b/hw/i386/pc_sysfw.c
index 73ac783f2055..845240f97293 100644
--- a/hw/i386/pc_sysfw.c
+++ b/hw/i386/pc_sysfw.c
@@ -181,6 +181,12 @@ static void pc_system_flash_init(MemoryRegion *rom_memory)
error_report("failed to encrypt pflash rom");
exit(1);
}
+
+ /*
+ * The pflash ROM is encrypted, set the debug ops so that any
+ * debug accesses will use memory encryption APIs.
+ */
+ kvm_memcrypt_set_debug_ops(flash_mem);
}
}
}
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 20/28] hw/i386: set ram_debug_ops when memory encryption is enabled
@ 2018-02-12 15:37 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh, Richard Henderson
When memory encryption is enabled, the guest RAM and boot flash ROM will
contain the encrypted data. By setting the debug ops allow us to invoke
encryption APIs when accessing the memory for the debug purposes.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
hw/i386/pc.c | 9 +++++++++
hw/i386/pc_sysfw.c | 6 ++++++
2 files changed, 15 insertions(+)
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 55e69d66fe6f..53ddecef369c 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1360,6 +1360,15 @@ void pc_memory_init(PCMachineState *pcms,
e820_add_entry(0x100000000ULL, pcms->above_4g_mem_size, E820_RAM);
}
+ /*
+ * When memory encryption is enabled, the guest RAM will be encrypted with
+ * a guest unique key. Set the debug ops so that any debug access to the
+ * guest RAM will go through the memory encryption APIs.
+ */
+ if (kvm_memcrypt_enabled()) {
+ kvm_memcrypt_set_debug_ops(ram);
+ }
+
if (!pcmc->has_reserved_memory &&
(machine->ram_slots ||
(machine->maxram_size > machine->ram_size))) {
diff --git a/hw/i386/pc_sysfw.c b/hw/i386/pc_sysfw.c
index 73ac783f2055..845240f97293 100644
--- a/hw/i386/pc_sysfw.c
+++ b/hw/i386/pc_sysfw.c
@@ -181,6 +181,12 @@ static void pc_system_flash_init(MemoryRegion *rom_memory)
error_report("failed to encrypt pflash rom");
exit(1);
}
+
+ /*
+ * The pflash ROM is encrypted, set the debug ops so that any
+ * debug accesses will use memory encryption APIs.
+ */
+ kvm_memcrypt_set_debug_ops(flash_mem);
}
}
}
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread
* [PATCH v8 21/28] sev/i386: add debug encrypt and decrypt commands
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:37 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
KVM_SEV_DBG_DECRYPT and KVM_SEV_DBG_ENCRYPT commands are used for
decrypting and encrypting guest memory region. The command works only if
the guest policy allows the debugging.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
accel/kvm/kvm-all.c | 1 +
include/sysemu/sev.h | 1 +
stubs/sev.c | 4 +++
target/i386/sev.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++++
target/i386/trace-events | 1 +
5 files changed, 79 insertions(+)
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 4974c00c46fb..f53d4ca503b0 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -1681,6 +1681,7 @@ static int kvm_init(MachineState *ms)
}
kvm_state->memcrypt_encrypt_data = sev_encrypt_data;
+ kvm_state->memcrypt_debug_ops = sev_set_debug_ops;
}
ret = kvm_arch_init(ms, s);
diff --git a/include/sysemu/sev.h b/include/sysemu/sev.h
index c173ad33f8bb..186ebca0f945 100644
--- a/include/sysemu/sev.h
+++ b/include/sysemu/sev.h
@@ -78,6 +78,7 @@ typedef struct SEVState SEVState;
void *sev_guest_init(const char *id);
int sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len);
+void sev_set_debug_ops(void *handle, MemoryRegion *mr);
#endif
diff --git a/stubs/sev.c b/stubs/sev.c
index 1e26a1bea8b7..89c774a3b7aa 100644
--- a/stubs/sev.c
+++ b/stubs/sev.c
@@ -15,6 +15,10 @@
#include "qemu-common.h"
#include "sysemu/sev.h"
+void sev_set_debug_ops(void *handle, MemoryRegion *mr)
+{
+}
+
int sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len)
{
return 1;
diff --git a/target/i386/sev.c b/target/i386/sev.c
index eda64df4cfa5..197b00313a2c 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -23,11 +23,13 @@
#define DEFAULT_GUEST_POLICY 0x1 /* disable debug */
#define DEFAULT_SEV_DEVICE "/dev/sev"
+#define GUEST_POLICY_DBG_BIT 0x1
static uint64_t me_mask;
static bool sev_active;
static int sev_fd;
static SEVState *sev_state;
+static MemoryRegionRAMReadWriteOps sev_ops;
#define SEV_FW_MAX_ERROR 0x17
@@ -576,6 +578,51 @@ sev_vm_state_change(void *opaque, int running, RunState state)
}
}
+static int
+sev_dbg_enc_dec(uint8_t *dst, const uint8_t *src, uint32_t len, bool write)
+{
+ int ret, error;
+ struct kvm_sev_dbg *dbg;
+
+ dbg = g_malloc0(sizeof(*dbg));
+ if (!dbg) {
+ return 1;
+ }
+
+ dbg->src_uaddr = (unsigned long)src;
+ dbg->dst_uaddr = (unsigned long)dst;
+ dbg->len = len;
+
+ trace_kvm_sev_debug(write ? "encrypt" : "decrypt", src, dst, len);
+ ret = sev_ioctl(write ? KVM_SEV_DBG_ENCRYPT : KVM_SEV_DBG_DECRYPT,
+ dbg, &error);
+ if (ret) {
+ error_report("%s (%s) %#llx->%#llx+%#x ret=%d fw_error=%d '%s'",
+ __func__, write ? "write" : "read", dbg->src_uaddr,
+ dbg->dst_uaddr, dbg->len, ret, error,
+ fw_error_to_str(error));
+ }
+
+ g_free(dbg);
+ return ret;
+}
+
+static int
+sev_mem_read(uint8_t *dst, const uint8_t *src, uint32_t len, MemTxAttrs attrs)
+{
+ assert(attrs.debug);
+
+ return sev_dbg_enc_dec(dst, src, len, false);
+}
+
+static int
+sev_mem_write(uint8_t *dst, const uint8_t *src, uint32_t len, MemTxAttrs attrs)
+{
+ assert(attrs.debug);
+
+ return sev_dbg_enc_dec(dst, src, len, true);
+}
+
void *
sev_guest_init(const char *id)
{
@@ -652,6 +699,31 @@ sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len)
return 0;
}
+void
+sev_set_debug_ops(void *handle, MemoryRegion *mr)
+{
+ int policy;
+ SEVState *s = (SEVState *)handle;
+
+ policy = object_property_get_int(OBJECT(s->sev_info),
+ "policy", &error_abort);
+
+ /*
+ * Check if guest policy supports debugging
+ * Bit 0 :
+ * 0 - debug allowed
+ * 1 - debug is not allowed
+ */
+ if (policy & GUEST_POLICY_DBG_BIT) {
+ return;
+ }
+
+ sev_ops.read = sev_mem_read;
+ sev_ops.write = sev_mem_write;
+
+ memory_region_set_ram_debug_ops(mr, &sev_ops);
+}
+
static void
sev_register_types(void)
{
diff --git a/target/i386/trace-events b/target/i386/trace-events
index b1fbde6e40fe..00aa6e98d810 100644
--- a/target/i386/trace-events
+++ b/target/i386/trace-events
@@ -15,3 +15,4 @@ kvm_sev_launch_start(int policy, void *session, void *pdh) "policy 0x%x session
kvm_sev_launch_update_data(void *addr, uint64_t len) "addr %p len 0x%" PRIu64
kvm_sev_launch_measurement(const char *value) "data %s"
kvm_sev_launch_finish(void) ""
+kvm_sev_debug(const char *op, const uint8_t *src, uint8_t *dst, int len) "(%s) src %p dst %p len %d"
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 21/28] sev/i386: add debug encrypt and decrypt commands
@ 2018-02-12 15:37 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh, Richard Henderson
KVM_SEV_DBG_DECRYPT and KVM_SEV_DBG_ENCRYPT commands are used for
decrypting and encrypting guest memory region. The command works only if
the guest policy allows the debugging.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
accel/kvm/kvm-all.c | 1 +
include/sysemu/sev.h | 1 +
stubs/sev.c | 4 +++
target/i386/sev.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++++
target/i386/trace-events | 1 +
5 files changed, 79 insertions(+)
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 4974c00c46fb..f53d4ca503b0 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -1681,6 +1681,7 @@ static int kvm_init(MachineState *ms)
}
kvm_state->memcrypt_encrypt_data = sev_encrypt_data;
+ kvm_state->memcrypt_debug_ops = sev_set_debug_ops;
}
ret = kvm_arch_init(ms, s);
diff --git a/include/sysemu/sev.h b/include/sysemu/sev.h
index c173ad33f8bb..186ebca0f945 100644
--- a/include/sysemu/sev.h
+++ b/include/sysemu/sev.h
@@ -78,6 +78,7 @@ typedef struct SEVState SEVState;
void *sev_guest_init(const char *id);
int sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len);
+void sev_set_debug_ops(void *handle, MemoryRegion *mr);
#endif
diff --git a/stubs/sev.c b/stubs/sev.c
index 1e26a1bea8b7..89c774a3b7aa 100644
--- a/stubs/sev.c
+++ b/stubs/sev.c
@@ -15,6 +15,10 @@
#include "qemu-common.h"
#include "sysemu/sev.h"
+void sev_set_debug_ops(void *handle, MemoryRegion *mr)
+{
+}
+
int sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len)
{
return 1;
diff --git a/target/i386/sev.c b/target/i386/sev.c
index eda64df4cfa5..197b00313a2c 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -23,11 +23,13 @@
#define DEFAULT_GUEST_POLICY 0x1 /* disable debug */
#define DEFAULT_SEV_DEVICE "/dev/sev"
+#define GUEST_POLICY_DBG_BIT 0x1
static uint64_t me_mask;
static bool sev_active;
static int sev_fd;
static SEVState *sev_state;
+static MemoryRegionRAMReadWriteOps sev_ops;
#define SEV_FW_MAX_ERROR 0x17
@@ -576,6 +578,51 @@ sev_vm_state_change(void *opaque, int running, RunState state)
}
}
+static int
+sev_dbg_enc_dec(uint8_t *dst, const uint8_t *src, uint32_t len, bool write)
+{
+ int ret, error;
+ struct kvm_sev_dbg *dbg;
+
+ dbg = g_malloc0(sizeof(*dbg));
+ if (!dbg) {
+ return 1;
+ }
+
+ dbg->src_uaddr = (unsigned long)src;
+ dbg->dst_uaddr = (unsigned long)dst;
+ dbg->len = len;
+
+ trace_kvm_sev_debug(write ? "encrypt" : "decrypt", src, dst, len);
+ ret = sev_ioctl(write ? KVM_SEV_DBG_ENCRYPT : KVM_SEV_DBG_DECRYPT,
+ dbg, &error);
+ if (ret) {
+ error_report("%s (%s) %#llx->%#llx+%#x ret=%d fw_error=%d '%s'",
+ __func__, write ? "write" : "read", dbg->src_uaddr,
+ dbg->dst_uaddr, dbg->len, ret, error,
+ fw_error_to_str(error));
+ }
+
+ g_free(dbg);
+ return ret;
+}
+
+static int
+sev_mem_read(uint8_t *dst, const uint8_t *src, uint32_t len, MemTxAttrs attrs)
+{
+ assert(attrs.debug);
+
+ return sev_dbg_enc_dec(dst, src, len, false);
+}
+
+static int
+sev_mem_write(uint8_t *dst, const uint8_t *src, uint32_t len, MemTxAttrs attrs)
+{
+ assert(attrs.debug);
+
+ return sev_dbg_enc_dec(dst, src, len, true);
+}
+
void *
sev_guest_init(const char *id)
{
@@ -652,6 +699,31 @@ sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len)
return 0;
}
+void
+sev_set_debug_ops(void *handle, MemoryRegion *mr)
+{
+ int policy;
+ SEVState *s = (SEVState *)handle;
+
+ policy = object_property_get_int(OBJECT(s->sev_info),
+ "policy", &error_abort);
+
+ /*
+ * Check if guest policy supports debugging
+ * Bit 0 :
+ * 0 - debug allowed
+ * 1 - debug is not allowed
+ */
+ if (policy & GUEST_POLICY_DBG_BIT) {
+ return;
+ }
+
+ sev_ops.read = sev_mem_read;
+ sev_ops.write = sev_mem_write;
+
+ memory_region_set_ram_debug_ops(mr, &sev_ops);
+}
+
static void
sev_register_types(void)
{
diff --git a/target/i386/trace-events b/target/i386/trace-events
index b1fbde6e40fe..00aa6e98d810 100644
--- a/target/i386/trace-events
+++ b/target/i386/trace-events
@@ -15,3 +15,4 @@ kvm_sev_launch_start(int policy, void *session, void *pdh) "policy 0x%x session
kvm_sev_launch_update_data(void *addr, uint64_t len) "addr %p len 0x%" PRIu64
kvm_sev_launch_measurement(const char *value) "data %s"
kvm_sev_launch_finish(void) ""
+kvm_sev_debug(const char *op, const uint8_t *src, uint8_t *dst, int len) "(%s) src %p dst %p len %d"
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread
* [PATCH v8 22/28] target/i386: clear C-bit when walking SEV guest page table
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:37 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
In SEV-enabled guest the pte entry will have C-bit set, we need to
clear the C-bit when walking the page table.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
target/i386/helper.c | 31 +++++++++++++----------
target/i386/monitor.c | 69 +++++++++++++++++++++++++++++++++------------------
2 files changed, 63 insertions(+), 37 deletions(-)
diff --git a/target/i386/helper.c b/target/i386/helper.c
index 58fb6eec562a..1791c854f7cf 100644
--- a/target/i386/helper.c
+++ b/target/i386/helper.c
@@ -21,6 +21,7 @@
#include "cpu.h"
#include "exec/exec-all.h"
#include "sysemu/kvm.h"
+#include "sysemu/sev.h"
#include "kvm_i386.h"
#ifndef CONFIG_USER_ONLY
#include "sysemu/sysemu.h"
@@ -732,6 +733,9 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
int32_t a20_mask;
uint32_t page_offset;
int page_size;
+ uint64_t me_mask;
+
+ me_mask = sev_get_me_mask();
a20_mask = x86_get_a20_mask(env);
if (!(env->cr[0] & CR0_PG_MASK)) {
@@ -755,25 +759,25 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
}
if (la57) {
- pml5e_addr = ((env->cr[3] & ~0xfff) +
+ pml5e_addr = ((env->cr[3] & ~0xfff & me_mask) +
(((addr >> 48) & 0x1ff) << 3)) & a20_mask;
- pml5e = ldq_phys_debug(cs, pml5e_addr);
+ pml5e = ldq_phys_debug(cs, pml5e_addr) & me_mask;
if (!(pml5e & PG_PRESENT_MASK)) {
return -1;
}
} else {
- pml5e = env->cr[3];
+ pml5e = env->cr[3] & me_mask;
}
pml4e_addr = ((pml5e & PG_ADDRESS_MASK) +
(((addr >> 39) & 0x1ff) << 3)) & a20_mask;
- pml4e = ldq_phys_debug(cs, pml4e_addr);
+ pml4e = ldq_phys_debug(cs, pml4e_addr) & me_mask;
if (!(pml4e & PG_PRESENT_MASK)) {
return -1;
}
pdpe_addr = ((pml4e & PG_ADDRESS_MASK) +
(((addr >> 30) & 0x1ff) << 3)) & a20_mask;
- pdpe = x86_ldq_phys(cs, pdpe_addr);
+ pdpe = ldq_phys_debug(cs, pdpe_addr) & me_mask;
if (!(pdpe & PG_PRESENT_MASK)) {
return -1;
}
@@ -786,16 +790,16 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
} else
#endif
{
- pdpe_addr = ((env->cr[3] & ~0x1f) + ((addr >> 27) & 0x18)) &
- a20_mask;
- pdpe = ldq_phys_debug(cs, pdpe_addr);
+ pdpe_addr = ((env->cr[3] & ~0x1f & me_mask) + ((addr >> 27) & 0x18))
+ & a20_mask;
+ pdpe = ldq_phys_debug(cs, pdpe_addr) & me_mask;
if (!(pdpe & PG_PRESENT_MASK))
return -1;
}
pde_addr = ((pdpe & PG_ADDRESS_MASK) +
(((addr >> 21) & 0x1ff) << 3)) & a20_mask;
- pde = ldq_phys_debug(cs, pde_addr);
+ pde = ldq_phys_debug(cs, pde_addr) & me_mask;
if (!(pde & PG_PRESENT_MASK)) {
return -1;
}
@@ -808,7 +812,7 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
pte_addr = ((pde & PG_ADDRESS_MASK) +
(((addr >> 12) & 0x1ff) << 3)) & a20_mask;
page_size = 4096;
- pte = ldq_phys_debug(cs, pte_addr);
+ pte = ldq_phys_debug(cs, pte_addr) & me_mask;
}
if (!(pte & PG_PRESENT_MASK)) {
return -1;
@@ -817,8 +821,9 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
uint32_t pde;
/* page directory entry */
- pde_addr = ((env->cr[3] & ~0xfff) + ((addr >> 20) & 0xffc)) & a20_mask;
- pde = ldl_phys_debug(cs, pde_addr);
+ pde_addr = ((env->cr[3] & ~0xfff & me_mask) + ((addr >> 20) & 0xffc))
+ & a20_mask;
+ pde = ldl_phys_debug(cs, pde_addr) & me_mask;
if (!(pde & PG_PRESENT_MASK))
return -1;
if ((pde & PG_PSE_MASK) && (env->cr[4] & CR4_PSE_MASK)) {
@@ -827,7 +832,7 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
} else {
/* page directory entry */
pte_addr = ((pde & ~0xfff) + ((addr >> 10) & 0xffc)) & a20_mask;
- pte = ldl_phys_debug(cs, pte_addr);
+ pte = ldl_phys_debug(cs, pte_addr) & me_mask;
if (!(pte & PG_PRESENT_MASK)) {
return -1;
}
diff --git a/target/i386/monitor.c b/target/i386/monitor.c
index 55ea10deb8ef..00b8cfcd3044 100644
--- a/target/i386/monitor.c
+++ b/target/i386/monitor.c
@@ -29,6 +29,7 @@
#include "qapi/qmp/qdict.h"
#include "hw/i386/pc.h"
#include "sysemu/kvm.h"
+#include "sysemu/sev.h"
#include "hmp.h"
@@ -95,16 +96,20 @@ static void tlb_info_pae32(Monitor *mon, CPUArchState *env)
unsigned int l1, l2, l3;
uint64_t pdpe, pde, pte;
uint64_t pdp_addr, pd_addr, pt_addr;
+ uint64_t me_mask;
+
+ me_mask = sev_get_me_mask();
pdp_addr = env->cr[3] & ~0x1f;
+ pdp_addr &= me_mask;
for (l1 = 0; l1 < 4; l1++) {
cpu_physical_memory_read_debug(pdp_addr + l1 * 8, &pdpe, 8);
- pdpe = le64_to_cpu(pdpe);
+ pdpe = le64_to_cpu(pdpe & me_mask);
if (pdpe & PG_PRESENT_MASK) {
pd_addr = pdpe & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
cpu_physical_memory_read_debug(pd_addr + l2 * 8, &pde, 8);
- pde = le64_to_cpu(pde);
+ pde = le64_to_cpu(pde & me_mask);
if (pde & PG_PRESENT_MASK) {
if (pde & PG_PSE_MASK) {
/* 2M pages with PAE, CR4.PSE is ignored */
@@ -115,7 +120,7 @@ static void tlb_info_pae32(Monitor *mon, CPUArchState *env)
for (l3 = 0; l3 < 512; l3++) {
cpu_physical_memory_read_debug(pt_addr + l3 * 8,
&pte, 8);
- pte = le64_to_cpu(pte);
+ pte = le64_to_cpu(pte & me_mask);
if (pte & PG_PRESENT_MASK) {
print_pte(mon, env, (l1 << 30) + (l2 << 21)
+ (l3 << 12),
@@ -137,10 +142,13 @@ static void tlb_info_la48(Monitor *mon, CPUArchState *env,
uint64_t l1, l2, l3, l4;
uint64_t pml4e, pdpe, pde, pte;
uint64_t pdp_addr, pd_addr, pt_addr;
+ uint64_t me_mask;
+
+ me_mask = sev_get_me_mask();
for (l1 = 0; l1 < 512; l1++) {
cpu_physical_memory_read_debug(pml4_addr + l1 * 8, &pml4e, 8);
- pml4e = le64_to_cpu(pml4e);
+ pml4e = le64_to_cpu(pml4e & me_mask);
if (!(pml4e & PG_PRESENT_MASK)) {
continue;
}
@@ -148,7 +156,7 @@ static void tlb_info_la48(Monitor *mon, CPUArchState *env,
pdp_addr = pml4e & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
cpu_physical_memory_read_debug(pdp_addr + l2 * 8, &pdpe, 8);
- pdpe = le64_to_cpu(pdpe);
+ pdpe = le64_to_cpu(pdpe & me_mask);
if (!(pdpe & PG_PRESENT_MASK)) {
continue;
}
@@ -163,7 +171,7 @@ static void tlb_info_la48(Monitor *mon, CPUArchState *env,
pd_addr = pdpe & 0x3fffffffff000ULL;
for (l3 = 0; l3 < 512; l3++) {
cpu_physical_memory_read_debug(pd_addr + l3 * 8, &pde, 8);
- pde = le64_to_cpu(pde);
+ pde = le64_to_cpu(pde & me_mask);
if (!(pde & PG_PRESENT_MASK)) {
continue;
}
@@ -178,7 +186,7 @@ static void tlb_info_la48(Monitor *mon, CPUArchState *env,
pt_addr = pde & 0x3fffffffff000ULL;
for (l4 = 0; l4 < 512; l4++) {
cpu_physical_memory_read_debug(pt_addr + l4 * 8, &pte, 8);
- pte = le64_to_cpu(pte);
+ pte = le64_to_cpu(pte & me_mask);
if (pte & PG_PRESENT_MASK) {
print_pte(mon, env, (l0 << 48) + (l1 << 39) +
(l2 << 30) + (l3 << 21) + (l4 << 12),
@@ -195,11 +203,14 @@ static void tlb_info_la57(Monitor *mon, CPUArchState *env)
uint64_t l0;
uint64_t pml5e;
uint64_t pml5_addr;
+ uint64_t me_mask;
- pml5_addr = env->cr[3] & 0x3fffffffff000ULL;
+ me_mask = sev_get_me_mask();
+
+ pml5_addr = env->cr[3] & 0x3fffffffff000ULL & me_mask;
for (l0 = 0; l0 < 512; l0++) {
cpu_physical_memory_read_debug(pml5_addr + l0 * 8, &pml5e, 8);
- pml5e = le64_to_cpu(pml5e);
+ pml5e = le64_to_cpu(pml5e & me_mask);
if (pml5e & PG_PRESENT_MASK) {
tlb_info_la48(mon, env, l0, pml5e & 0x3fffffffff000ULL);
}
@@ -227,7 +238,8 @@ void hmp_info_tlb(Monitor *mon, const QDict *qdict)
if (env->cr[4] & CR4_LA57_MASK) {
tlb_info_la57(mon, env);
} else {
- tlb_info_la48(mon, env, 0, env->cr[3] & 0x3fffffffff000ULL);
+ tlb_info_la48(mon, env, 0, env->cr[3] & 0x3fffffffff000ULL &
+ sev_get_me_mask());
}
} else
#endif
@@ -311,19 +323,22 @@ static void mem_info_pae32(Monitor *mon, CPUArchState *env)
uint64_t pdpe, pde, pte;
uint64_t pdp_addr, pd_addr, pt_addr;
hwaddr start, end;
+ uint64_t me_mask;
- pdp_addr = env->cr[3] & ~0x1f;
+ me_mask = sev_get_me_mask();
+
+ pdp_addr = env->cr[3] & ~0x1f & me_mask;
last_prot = 0;
start = -1;
for (l1 = 0; l1 < 4; l1++) {
cpu_physical_memory_read_debug(pdp_addr + l1 * 8, &pdpe, 8);
- pdpe = le64_to_cpu(pdpe);
+ pdpe = le64_to_cpu(pdpe & me_mask);
end = l1 << 30;
if (pdpe & PG_PRESENT_MASK) {
pd_addr = pdpe & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
cpu_physical_memory_read_debug(pd_addr + l2 * 8, &pde, 8);
- pde = le64_to_cpu(pde);
+ pde = le64_to_cpu(pde & me_mask);
end = (l1 << 30) + (l2 << 21);
if (pde & PG_PRESENT_MASK) {
if (pde & PG_PSE_MASK) {
@@ -335,7 +350,7 @@ static void mem_info_pae32(Monitor *mon, CPUArchState *env)
for (l3 = 0; l3 < 512; l3++) {
cpu_physical_memory_read_debug(pt_addr + l3 * 8,
&pte, 8);
- pte = le64_to_cpu(pte);
+ pte = le64_to_cpu(pte & me_mask);
end = (l1 << 30) + (l2 << 21) + (l3 << 12);
if (pte & PG_PRESENT_MASK) {
prot = pte & pde & (PG_USER_MASK | PG_RW_MASK |
@@ -368,19 +383,22 @@ static void mem_info_la48(Monitor *mon, CPUArchState *env)
uint64_t l1, l2, l3, l4;
uint64_t pml4e, pdpe, pde, pte;
uint64_t pml4_addr, pdp_addr, pd_addr, pt_addr, start, end;
+ uint64_t me_mask;
+
+ me_mask = sev_get_me_mask();
- pml4_addr = env->cr[3] & 0x3fffffffff000ULL;
+ pml4_addr = env->cr[3] & 0x3fffffffff000ULL & me_mask;
last_prot = 0;
start = -1;
for (l1 = 0; l1 < 512; l1++) {
cpu_physical_memory_read_debug(pml4_addr + l1 * 8, &pml4e, 8);
- pml4e = le64_to_cpu(pml4e);
+ pml4e = le64_to_cpu(pml4e & me_mask);
end = l1 << 39;
if (pml4e & PG_PRESENT_MASK) {
pdp_addr = pml4e & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
cpu_physical_memory_read_debug(pdp_addr + l2 * 8, &pdpe, 8);
- pdpe = le64_to_cpu(pdpe);
+ pdpe = le64_to_cpu(pdpe & me_mask);
end = (l1 << 39) + (l2 << 30);
if (pdpe & PG_PRESENT_MASK) {
if (pdpe & PG_PSE_MASK) {
@@ -393,7 +411,7 @@ static void mem_info_la48(Monitor *mon, CPUArchState *env)
for (l3 = 0; l3 < 512; l3++) {
cpu_physical_memory_read_debug(pd_addr + l3 * 8,
&pde, 8);
- pde = le64_to_cpu(pde);
+ pde = le64_to_cpu(pde & me_mask);
end = (l1 << 39) + (l2 << 30) + (l3 << 21);
if (pde & PG_PRESENT_MASK) {
if (pde & PG_PSE_MASK) {
@@ -407,7 +425,7 @@ static void mem_info_la48(Monitor *mon, CPUArchState *env)
cpu_physical_memory_read_debug(pt_addr
+ l4 * 8,
&pte, 8);
- pte = le64_to_cpu(pte);
+ pte = le64_to_cpu(pte & me_mask);
end = (l1 << 39) + (l2 << 30) +
(l3 << 21) + (l4 << 12);
if (pte & PG_PRESENT_MASK) {
@@ -446,13 +464,16 @@ static void mem_info_la57(Monitor *mon, CPUArchState *env)
uint64_t l0, l1, l2, l3, l4;
uint64_t pml5e, pml4e, pdpe, pde, pte;
uint64_t pml5_addr, pml4_addr, pdp_addr, pd_addr, pt_addr, start, end;
+ uint64_t me_mask;
+
+ me_mask = sev_get_me_mask();
- pml5_addr = env->cr[3] & 0x3fffffffff000ULL;
+ pml5_addr = env->cr[3] & 0x3fffffffff000ULL & me_mask;
last_prot = 0;
start = -1;
for (l0 = 0; l0 < 512; l0++) {
cpu_physical_memory_read_debug(pml5_addr + l0 * 8, &pml5e, 8);
- pml5e = le64_to_cpu(pml5e);
+ pml5e = le64_to_cpu(pml5e & me_mask);
end = l0 << 48;
if (!(pml5e & PG_PRESENT_MASK)) {
prot = 0;
@@ -463,7 +484,7 @@ static void mem_info_la57(Monitor *mon, CPUArchState *env)
pml4_addr = pml5e & 0x3fffffffff000ULL;
for (l1 = 0; l1 < 512; l1++) {
cpu_physical_memory_read_debug(pml4_addr + l1 * 8, &pml4e, 8);
- pml4e = le64_to_cpu(pml4e);
+ pml4e = le64_to_cpu(pml4e & me_mask);
end = (l0 << 48) + (l1 << 39);
if (!(pml4e & PG_PRESENT_MASK)) {
prot = 0;
@@ -474,7 +495,7 @@ static void mem_info_la57(Monitor *mon, CPUArchState *env)
pdp_addr = pml4e & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
cpu_physical_memory_read_debug(pdp_addr + l2 * 8, &pdpe, 8);
- pdpe = le64_to_cpu(pdpe);
+ pdpe = le64_to_cpu(pdpe & me_mask);
end = (l0 << 48) + (l1 << 39) + (l2 << 30);
if (pdpe & PG_PRESENT_MASK) {
prot = 0;
@@ -493,7 +514,7 @@ static void mem_info_la57(Monitor *mon, CPUArchState *env)
pd_addr = pdpe & 0x3fffffffff000ULL;
for (l3 = 0; l3 < 512; l3++) {
cpu_physical_memory_read_debug(pd_addr + l3 * 8, &pde, 8);
- pde = le64_to_cpu(pde);
+ pde = le64_to_cpu(pde & me_mask);
end = (l0 << 48) + (l1 << 39) + (l2 << 30) + (l3 << 21);
if (pde & PG_PRESENT_MASK) {
prot = 0;
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 22/28] target/i386: clear C-bit when walking SEV guest page table
@ 2018-02-12 15:37 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh, Richard Henderson
In SEV-enabled guest the pte entry will have C-bit set, we need to
clear the C-bit when walking the page table.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
target/i386/helper.c | 31 +++++++++++++----------
target/i386/monitor.c | 69 +++++++++++++++++++++++++++++++++------------------
2 files changed, 63 insertions(+), 37 deletions(-)
diff --git a/target/i386/helper.c b/target/i386/helper.c
index 58fb6eec562a..1791c854f7cf 100644
--- a/target/i386/helper.c
+++ b/target/i386/helper.c
@@ -21,6 +21,7 @@
#include "cpu.h"
#include "exec/exec-all.h"
#include "sysemu/kvm.h"
+#include "sysemu/sev.h"
#include "kvm_i386.h"
#ifndef CONFIG_USER_ONLY
#include "sysemu/sysemu.h"
@@ -732,6 +733,9 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
int32_t a20_mask;
uint32_t page_offset;
int page_size;
+ uint64_t me_mask;
+
+ me_mask = sev_get_me_mask();
a20_mask = x86_get_a20_mask(env);
if (!(env->cr[0] & CR0_PG_MASK)) {
@@ -755,25 +759,25 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
}
if (la57) {
- pml5e_addr = ((env->cr[3] & ~0xfff) +
+ pml5e_addr = ((env->cr[3] & ~0xfff & me_mask) +
(((addr >> 48) & 0x1ff) << 3)) & a20_mask;
- pml5e = ldq_phys_debug(cs, pml5e_addr);
+ pml5e = ldq_phys_debug(cs, pml5e_addr) & me_mask;
if (!(pml5e & PG_PRESENT_MASK)) {
return -1;
}
} else {
- pml5e = env->cr[3];
+ pml5e = env->cr[3] & me_mask;
}
pml4e_addr = ((pml5e & PG_ADDRESS_MASK) +
(((addr >> 39) & 0x1ff) << 3)) & a20_mask;
- pml4e = ldq_phys_debug(cs, pml4e_addr);
+ pml4e = ldq_phys_debug(cs, pml4e_addr) & me_mask;
if (!(pml4e & PG_PRESENT_MASK)) {
return -1;
}
pdpe_addr = ((pml4e & PG_ADDRESS_MASK) +
(((addr >> 30) & 0x1ff) << 3)) & a20_mask;
- pdpe = x86_ldq_phys(cs, pdpe_addr);
+ pdpe = ldq_phys_debug(cs, pdpe_addr) & me_mask;
if (!(pdpe & PG_PRESENT_MASK)) {
return -1;
}
@@ -786,16 +790,16 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
} else
#endif
{
- pdpe_addr = ((env->cr[3] & ~0x1f) + ((addr >> 27) & 0x18)) &
- a20_mask;
- pdpe = ldq_phys_debug(cs, pdpe_addr);
+ pdpe_addr = ((env->cr[3] & ~0x1f & me_mask) + ((addr >> 27) & 0x18))
+ & a20_mask;
+ pdpe = ldq_phys_debug(cs, pdpe_addr) & me_mask;
if (!(pdpe & PG_PRESENT_MASK))
return -1;
}
pde_addr = ((pdpe & PG_ADDRESS_MASK) +
(((addr >> 21) & 0x1ff) << 3)) & a20_mask;
- pde = ldq_phys_debug(cs, pde_addr);
+ pde = ldq_phys_debug(cs, pde_addr) & me_mask;
if (!(pde & PG_PRESENT_MASK)) {
return -1;
}
@@ -808,7 +812,7 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
pte_addr = ((pde & PG_ADDRESS_MASK) +
(((addr >> 12) & 0x1ff) << 3)) & a20_mask;
page_size = 4096;
- pte = ldq_phys_debug(cs, pte_addr);
+ pte = ldq_phys_debug(cs, pte_addr) & me_mask;
}
if (!(pte & PG_PRESENT_MASK)) {
return -1;
@@ -817,8 +821,9 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
uint32_t pde;
/* page directory entry */
- pde_addr = ((env->cr[3] & ~0xfff) + ((addr >> 20) & 0xffc)) & a20_mask;
- pde = ldl_phys_debug(cs, pde_addr);
+ pde_addr = ((env->cr[3] & ~0xfff & me_mask) + ((addr >> 20) & 0xffc))
+ & a20_mask;
+ pde = ldl_phys_debug(cs, pde_addr) & me_mask;
if (!(pde & PG_PRESENT_MASK))
return -1;
if ((pde & PG_PSE_MASK) && (env->cr[4] & CR4_PSE_MASK)) {
@@ -827,7 +832,7 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
} else {
/* page directory entry */
pte_addr = ((pde & ~0xfff) + ((addr >> 10) & 0xffc)) & a20_mask;
- pte = ldl_phys_debug(cs, pte_addr);
+ pte = ldl_phys_debug(cs, pte_addr) & me_mask;
if (!(pte & PG_PRESENT_MASK)) {
return -1;
}
diff --git a/target/i386/monitor.c b/target/i386/monitor.c
index 55ea10deb8ef..00b8cfcd3044 100644
--- a/target/i386/monitor.c
+++ b/target/i386/monitor.c
@@ -29,6 +29,7 @@
#include "qapi/qmp/qdict.h"
#include "hw/i386/pc.h"
#include "sysemu/kvm.h"
+#include "sysemu/sev.h"
#include "hmp.h"
@@ -95,16 +96,20 @@ static void tlb_info_pae32(Monitor *mon, CPUArchState *env)
unsigned int l1, l2, l3;
uint64_t pdpe, pde, pte;
uint64_t pdp_addr, pd_addr, pt_addr;
+ uint64_t me_mask;
+
+ me_mask = sev_get_me_mask();
pdp_addr = env->cr[3] & ~0x1f;
+ pdp_addr &= me_mask;
for (l1 = 0; l1 < 4; l1++) {
cpu_physical_memory_read_debug(pdp_addr + l1 * 8, &pdpe, 8);
- pdpe = le64_to_cpu(pdpe);
+ pdpe = le64_to_cpu(pdpe & me_mask);
if (pdpe & PG_PRESENT_MASK) {
pd_addr = pdpe & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
cpu_physical_memory_read_debug(pd_addr + l2 * 8, &pde, 8);
- pde = le64_to_cpu(pde);
+ pde = le64_to_cpu(pde & me_mask);
if (pde & PG_PRESENT_MASK) {
if (pde & PG_PSE_MASK) {
/* 2M pages with PAE, CR4.PSE is ignored */
@@ -115,7 +120,7 @@ static void tlb_info_pae32(Monitor *mon, CPUArchState *env)
for (l3 = 0; l3 < 512; l3++) {
cpu_physical_memory_read_debug(pt_addr + l3 * 8,
&pte, 8);
- pte = le64_to_cpu(pte);
+ pte = le64_to_cpu(pte & me_mask);
if (pte & PG_PRESENT_MASK) {
print_pte(mon, env, (l1 << 30) + (l2 << 21)
+ (l3 << 12),
@@ -137,10 +142,13 @@ static void tlb_info_la48(Monitor *mon, CPUArchState *env,
uint64_t l1, l2, l3, l4;
uint64_t pml4e, pdpe, pde, pte;
uint64_t pdp_addr, pd_addr, pt_addr;
+ uint64_t me_mask;
+
+ me_mask = sev_get_me_mask();
for (l1 = 0; l1 < 512; l1++) {
cpu_physical_memory_read_debug(pml4_addr + l1 * 8, &pml4e, 8);
- pml4e = le64_to_cpu(pml4e);
+ pml4e = le64_to_cpu(pml4e & me_mask);
if (!(pml4e & PG_PRESENT_MASK)) {
continue;
}
@@ -148,7 +156,7 @@ static void tlb_info_la48(Monitor *mon, CPUArchState *env,
pdp_addr = pml4e & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
cpu_physical_memory_read_debug(pdp_addr + l2 * 8, &pdpe, 8);
- pdpe = le64_to_cpu(pdpe);
+ pdpe = le64_to_cpu(pdpe & me_mask);
if (!(pdpe & PG_PRESENT_MASK)) {
continue;
}
@@ -163,7 +171,7 @@ static void tlb_info_la48(Monitor *mon, CPUArchState *env,
pd_addr = pdpe & 0x3fffffffff000ULL;
for (l3 = 0; l3 < 512; l3++) {
cpu_physical_memory_read_debug(pd_addr + l3 * 8, &pde, 8);
- pde = le64_to_cpu(pde);
+ pde = le64_to_cpu(pde & me_mask);
if (!(pde & PG_PRESENT_MASK)) {
continue;
}
@@ -178,7 +186,7 @@ static void tlb_info_la48(Monitor *mon, CPUArchState *env,
pt_addr = pde & 0x3fffffffff000ULL;
for (l4 = 0; l4 < 512; l4++) {
cpu_physical_memory_read_debug(pt_addr + l4 * 8, &pte, 8);
- pte = le64_to_cpu(pte);
+ pte = le64_to_cpu(pte & me_mask);
if (pte & PG_PRESENT_MASK) {
print_pte(mon, env, (l0 << 48) + (l1 << 39) +
(l2 << 30) + (l3 << 21) + (l4 << 12),
@@ -195,11 +203,14 @@ static void tlb_info_la57(Monitor *mon, CPUArchState *env)
uint64_t l0;
uint64_t pml5e;
uint64_t pml5_addr;
+ uint64_t me_mask;
- pml5_addr = env->cr[3] & 0x3fffffffff000ULL;
+ me_mask = sev_get_me_mask();
+
+ pml5_addr = env->cr[3] & 0x3fffffffff000ULL & me_mask;
for (l0 = 0; l0 < 512; l0++) {
cpu_physical_memory_read_debug(pml5_addr + l0 * 8, &pml5e, 8);
- pml5e = le64_to_cpu(pml5e);
+ pml5e = le64_to_cpu(pml5e & me_mask);
if (pml5e & PG_PRESENT_MASK) {
tlb_info_la48(mon, env, l0, pml5e & 0x3fffffffff000ULL);
}
@@ -227,7 +238,8 @@ void hmp_info_tlb(Monitor *mon, const QDict *qdict)
if (env->cr[4] & CR4_LA57_MASK) {
tlb_info_la57(mon, env);
} else {
- tlb_info_la48(mon, env, 0, env->cr[3] & 0x3fffffffff000ULL);
+ tlb_info_la48(mon, env, 0, env->cr[3] & 0x3fffffffff000ULL &
+ sev_get_me_mask());
}
} else
#endif
@@ -311,19 +323,22 @@ static void mem_info_pae32(Monitor *mon, CPUArchState *env)
uint64_t pdpe, pde, pte;
uint64_t pdp_addr, pd_addr, pt_addr;
hwaddr start, end;
+ uint64_t me_mask;
- pdp_addr = env->cr[3] & ~0x1f;
+ me_mask = sev_get_me_mask();
+
+ pdp_addr = env->cr[3] & ~0x1f & me_mask;
last_prot = 0;
start = -1;
for (l1 = 0; l1 < 4; l1++) {
cpu_physical_memory_read_debug(pdp_addr + l1 * 8, &pdpe, 8);
- pdpe = le64_to_cpu(pdpe);
+ pdpe = le64_to_cpu(pdpe & me_mask);
end = l1 << 30;
if (pdpe & PG_PRESENT_MASK) {
pd_addr = pdpe & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
cpu_physical_memory_read_debug(pd_addr + l2 * 8, &pde, 8);
- pde = le64_to_cpu(pde);
+ pde = le64_to_cpu(pde & me_mask);
end = (l1 << 30) + (l2 << 21);
if (pde & PG_PRESENT_MASK) {
if (pde & PG_PSE_MASK) {
@@ -335,7 +350,7 @@ static void mem_info_pae32(Monitor *mon, CPUArchState *env)
for (l3 = 0; l3 < 512; l3++) {
cpu_physical_memory_read_debug(pt_addr + l3 * 8,
&pte, 8);
- pte = le64_to_cpu(pte);
+ pte = le64_to_cpu(pte & me_mask);
end = (l1 << 30) + (l2 << 21) + (l3 << 12);
if (pte & PG_PRESENT_MASK) {
prot = pte & pde & (PG_USER_MASK | PG_RW_MASK |
@@ -368,19 +383,22 @@ static void mem_info_la48(Monitor *mon, CPUArchState *env)
uint64_t l1, l2, l3, l4;
uint64_t pml4e, pdpe, pde, pte;
uint64_t pml4_addr, pdp_addr, pd_addr, pt_addr, start, end;
+ uint64_t me_mask;
+
+ me_mask = sev_get_me_mask();
- pml4_addr = env->cr[3] & 0x3fffffffff000ULL;
+ pml4_addr = env->cr[3] & 0x3fffffffff000ULL & me_mask;
last_prot = 0;
start = -1;
for (l1 = 0; l1 < 512; l1++) {
cpu_physical_memory_read_debug(pml4_addr + l1 * 8, &pml4e, 8);
- pml4e = le64_to_cpu(pml4e);
+ pml4e = le64_to_cpu(pml4e & me_mask);
end = l1 << 39;
if (pml4e & PG_PRESENT_MASK) {
pdp_addr = pml4e & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
cpu_physical_memory_read_debug(pdp_addr + l2 * 8, &pdpe, 8);
- pdpe = le64_to_cpu(pdpe);
+ pdpe = le64_to_cpu(pdpe & me_mask);
end = (l1 << 39) + (l2 << 30);
if (pdpe & PG_PRESENT_MASK) {
if (pdpe & PG_PSE_MASK) {
@@ -393,7 +411,7 @@ static void mem_info_la48(Monitor *mon, CPUArchState *env)
for (l3 = 0; l3 < 512; l3++) {
cpu_physical_memory_read_debug(pd_addr + l3 * 8,
&pde, 8);
- pde = le64_to_cpu(pde);
+ pde = le64_to_cpu(pde & me_mask);
end = (l1 << 39) + (l2 << 30) + (l3 << 21);
if (pde & PG_PRESENT_MASK) {
if (pde & PG_PSE_MASK) {
@@ -407,7 +425,7 @@ static void mem_info_la48(Monitor *mon, CPUArchState *env)
cpu_physical_memory_read_debug(pt_addr
+ l4 * 8,
&pte, 8);
- pte = le64_to_cpu(pte);
+ pte = le64_to_cpu(pte & me_mask);
end = (l1 << 39) + (l2 << 30) +
(l3 << 21) + (l4 << 12);
if (pte & PG_PRESENT_MASK) {
@@ -446,13 +464,16 @@ static void mem_info_la57(Monitor *mon, CPUArchState *env)
uint64_t l0, l1, l2, l3, l4;
uint64_t pml5e, pml4e, pdpe, pde, pte;
uint64_t pml5_addr, pml4_addr, pdp_addr, pd_addr, pt_addr, start, end;
+ uint64_t me_mask;
+
+ me_mask = sev_get_me_mask();
- pml5_addr = env->cr[3] & 0x3fffffffff000ULL;
+ pml5_addr = env->cr[3] & 0x3fffffffff000ULL & me_mask;
last_prot = 0;
start = -1;
for (l0 = 0; l0 < 512; l0++) {
cpu_physical_memory_read_debug(pml5_addr + l0 * 8, &pml5e, 8);
- pml5e = le64_to_cpu(pml5e);
+ pml5e = le64_to_cpu(pml5e & me_mask);
end = l0 << 48;
if (!(pml5e & PG_PRESENT_MASK)) {
prot = 0;
@@ -463,7 +484,7 @@ static void mem_info_la57(Monitor *mon, CPUArchState *env)
pml4_addr = pml5e & 0x3fffffffff000ULL;
for (l1 = 0; l1 < 512; l1++) {
cpu_physical_memory_read_debug(pml4_addr + l1 * 8, &pml4e, 8);
- pml4e = le64_to_cpu(pml4e);
+ pml4e = le64_to_cpu(pml4e & me_mask);
end = (l0 << 48) + (l1 << 39);
if (!(pml4e & PG_PRESENT_MASK)) {
prot = 0;
@@ -474,7 +495,7 @@ static void mem_info_la57(Monitor *mon, CPUArchState *env)
pdp_addr = pml4e & 0x3fffffffff000ULL;
for (l2 = 0; l2 < 512; l2++) {
cpu_physical_memory_read_debug(pdp_addr + l2 * 8, &pdpe, 8);
- pdpe = le64_to_cpu(pdpe);
+ pdpe = le64_to_cpu(pdpe & me_mask);
end = (l0 << 48) + (l1 << 39) + (l2 << 30);
if (pdpe & PG_PRESENT_MASK) {
prot = 0;
@@ -493,7 +514,7 @@ static void mem_info_la57(Monitor *mon, CPUArchState *env)
pd_addr = pdpe & 0x3fffffffff000ULL;
for (l3 = 0; l3 < 512; l3++) {
cpu_physical_memory_read_debug(pd_addr + l3 * 8, &pde, 8);
- pde = le64_to_cpu(pde);
+ pde = le64_to_cpu(pde & me_mask);
end = (l0 << 48) + (l1 << 39) + (l2 << 30) + (l3 << 21);
if (pde & PG_PRESENT_MASK) {
prot = 0;
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread
* [PATCH v8 23/28] include: add psp-sev.h header file
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:37 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
The header file provide the ioctl command and structure to communicate
with /dev/sev device.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
| 142 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 142 insertions(+)
create mode 100644 linux-headers/linux/psp-sev.h
--git a/linux-headers/linux/psp-sev.h b/linux-headers/linux/psp-sev.h
new file mode 100644
index 000000000000..33e247471ae0
--- /dev/null
+++ b/linux-headers/linux/psp-sev.h
@@ -0,0 +1,142 @@
+/*
+ * Userspace interface for AMD Secure Encrypted Virtualization (SEV)
+ * platform management commands.
+ *
+ * Copyright (C) 2016-2017 Advanced Micro Devices, Inc.
+ *
+ * Author: Brijesh Singh <brijesh.singh@amd.com>
+ *
+ * SEV spec 0.14 is available at:
+ * http://support.amd.com/TechDocs/55766_SEV-KM%20API_Specification.pdf
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __PSP_SEV_USER_H__
+#define __PSP_SEV_USER_H__
+
+#include <linux/types.h>
+
+/**
+ * SEV platform commands
+ */
+enum {
+ SEV_FACTORY_RESET = 0,
+ SEV_PLATFORM_STATUS,
+ SEV_PEK_GEN,
+ SEV_PEK_CSR,
+ SEV_PDH_GEN,
+ SEV_PDH_CERT_EXPORT,
+ SEV_PEK_CERT_IMPORT,
+
+ SEV_MAX,
+};
+
+/**
+ * SEV Firmware status code
+ */
+typedef enum {
+ SEV_RET_SUCCESS = 0,
+ SEV_RET_INVALID_PLATFORM_STATE,
+ SEV_RET_INVALID_GUEST_STATE,
+ SEV_RET_INAVLID_CONFIG,
+ SEV_RET_INVALID_LEN,
+ SEV_RET_ALREADY_OWNED,
+ SEV_RET_INVALID_CERTIFICATE,
+ SEV_RET_POLICY_FAILURE,
+ SEV_RET_INACTIVE,
+ SEV_RET_INVALID_ADDRESS,
+ SEV_RET_BAD_SIGNATURE,
+ SEV_RET_BAD_MEASUREMENT,
+ SEV_RET_ASID_OWNED,
+ SEV_RET_INVALID_ASID,
+ SEV_RET_WBINVD_REQUIRED,
+ SEV_RET_DFFLUSH_REQUIRED,
+ SEV_RET_INVALID_GUEST,
+ SEV_RET_INVALID_COMMAND,
+ SEV_RET_ACTIVE,
+ SEV_RET_HWSEV_RET_PLATFORM,
+ SEV_RET_HWSEV_RET_UNSAFE,
+ SEV_RET_UNSUPPORTED,
+ SEV_RET_MAX,
+} sev_ret_code;
+
+/**
+ * struct sev_user_data_status - PLATFORM_STATUS command parameters
+ *
+ * @major: major API version
+ * @minor: minor API version
+ * @state: platform state
+ * @flags: platform config flags
+ * @build: firmware build id for API version
+ * @guest_count: number of active guests
+ */
+struct sev_user_data_status {
+ __u8 api_major; /* Out */
+ __u8 api_minor; /* Out */
+ __u8 state; /* Out */
+ __u32 flags; /* Out */
+ __u8 build; /* Out */
+ __u32 guest_count; /* Out */
+} __attribute__((packed));
+
+/**
+ * struct sev_user_data_pek_csr - PEK_CSR command parameters
+ *
+ * @address: PEK certificate chain
+ * @length: length of certificate
+ */
+struct sev_user_data_pek_csr {
+ __u64 address; /* In */
+ __u32 length; /* In/Out */
+} __attribute__((packed));
+
+/**
+ * struct sev_user_data_cert_import - PEK_CERT_IMPORT command parameters
+ *
+ * @pek_address: PEK certificate chain
+ * @pek_len: length of PEK certificate
+ * @oca_address: OCA certificate chain
+ * @oca_len: length of OCA certificate
+ */
+struct sev_user_data_pek_cert_import {
+ __u64 pek_cert_address; /* In */
+ __u32 pek_cert_len; /* In */
+ __u64 oca_cert_address; /* In */
+ __u32 oca_cert_len; /* In */
+} __attribute__((packed));
+
+/**
+ * struct sev_user_data_pdh_cert_export - PDH_CERT_EXPORT command parameters
+ *
+ * @pdh_address: PDH certificate address
+ * @pdh_len: length of PDH certificate
+ * @cert_chain_address: PDH certificate chain
+ * @cert_chain_len: length of PDH certificate chain
+ */
+struct sev_user_data_pdh_cert_export {
+ __u64 pdh_cert_address; /* In */
+ __u32 pdh_cert_len; /* In/Out */
+ __u64 cert_chain_address; /* In */
+ __u32 cert_chain_len; /* In/Out */
+} __attribute__((packed));
+
+/**
+ * struct sev_issue_cmd - SEV ioctl parameters
+ *
+ * @cmd: SEV commands to execute
+ * @opaque: pointer to the command structure
+ * @error: SEV FW return code on failure
+ */
+struct sev_issue_cmd {
+ __u32 cmd; /* In */
+ __u64 data; /* In */
+ __u32 error; /* Out */
+} __attribute__((packed));
+
+#define SEV_IOC_TYPE 'S'
+#define SEV_ISSUE_CMD _IOWR(SEV_IOC_TYPE, 0x0, struct sev_issue_cmd)
+
+#endif /* __PSP_USER_SEV_H */
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 23/28] include: add psp-sev.h header file
@ 2018-02-12 15:37 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh, Richard Henderson
The header file provide the ioctl command and structure to communicate
with /dev/sev device.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
| 142 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 142 insertions(+)
create mode 100644 linux-headers/linux/psp-sev.h
--git a/linux-headers/linux/psp-sev.h b/linux-headers/linux/psp-sev.h
new file mode 100644
index 000000000000..33e247471ae0
--- /dev/null
+++ b/linux-headers/linux/psp-sev.h
@@ -0,0 +1,142 @@
+/*
+ * Userspace interface for AMD Secure Encrypted Virtualization (SEV)
+ * platform management commands.
+ *
+ * Copyright (C) 2016-2017 Advanced Micro Devices, Inc.
+ *
+ * Author: Brijesh Singh <brijesh.singh@amd.com>
+ *
+ * SEV spec 0.14 is available at:
+ * http://support.amd.com/TechDocs/55766_SEV-KM%20API_Specification.pdf
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __PSP_SEV_USER_H__
+#define __PSP_SEV_USER_H__
+
+#include <linux/types.h>
+
+/**
+ * SEV platform commands
+ */
+enum {
+ SEV_FACTORY_RESET = 0,
+ SEV_PLATFORM_STATUS,
+ SEV_PEK_GEN,
+ SEV_PEK_CSR,
+ SEV_PDH_GEN,
+ SEV_PDH_CERT_EXPORT,
+ SEV_PEK_CERT_IMPORT,
+
+ SEV_MAX,
+};
+
+/**
+ * SEV Firmware status code
+ */
+typedef enum {
+ SEV_RET_SUCCESS = 0,
+ SEV_RET_INVALID_PLATFORM_STATE,
+ SEV_RET_INVALID_GUEST_STATE,
+ SEV_RET_INAVLID_CONFIG,
+ SEV_RET_INVALID_LEN,
+ SEV_RET_ALREADY_OWNED,
+ SEV_RET_INVALID_CERTIFICATE,
+ SEV_RET_POLICY_FAILURE,
+ SEV_RET_INACTIVE,
+ SEV_RET_INVALID_ADDRESS,
+ SEV_RET_BAD_SIGNATURE,
+ SEV_RET_BAD_MEASUREMENT,
+ SEV_RET_ASID_OWNED,
+ SEV_RET_INVALID_ASID,
+ SEV_RET_WBINVD_REQUIRED,
+ SEV_RET_DFFLUSH_REQUIRED,
+ SEV_RET_INVALID_GUEST,
+ SEV_RET_INVALID_COMMAND,
+ SEV_RET_ACTIVE,
+ SEV_RET_HWSEV_RET_PLATFORM,
+ SEV_RET_HWSEV_RET_UNSAFE,
+ SEV_RET_UNSUPPORTED,
+ SEV_RET_MAX,
+} sev_ret_code;
+
+/**
+ * struct sev_user_data_status - PLATFORM_STATUS command parameters
+ *
+ * @major: major API version
+ * @minor: minor API version
+ * @state: platform state
+ * @flags: platform config flags
+ * @build: firmware build id for API version
+ * @guest_count: number of active guests
+ */
+struct sev_user_data_status {
+ __u8 api_major; /* Out */
+ __u8 api_minor; /* Out */
+ __u8 state; /* Out */
+ __u32 flags; /* Out */
+ __u8 build; /* Out */
+ __u32 guest_count; /* Out */
+} __attribute__((packed));
+
+/**
+ * struct sev_user_data_pek_csr - PEK_CSR command parameters
+ *
+ * @address: PEK certificate chain
+ * @length: length of certificate
+ */
+struct sev_user_data_pek_csr {
+ __u64 address; /* In */
+ __u32 length; /* In/Out */
+} __attribute__((packed));
+
+/**
+ * struct sev_user_data_cert_import - PEK_CERT_IMPORT command parameters
+ *
+ * @pek_address: PEK certificate chain
+ * @pek_len: length of PEK certificate
+ * @oca_address: OCA certificate chain
+ * @oca_len: length of OCA certificate
+ */
+struct sev_user_data_pek_cert_import {
+ __u64 pek_cert_address; /* In */
+ __u32 pek_cert_len; /* In */
+ __u64 oca_cert_address; /* In */
+ __u32 oca_cert_len; /* In */
+} __attribute__((packed));
+
+/**
+ * struct sev_user_data_pdh_cert_export - PDH_CERT_EXPORT command parameters
+ *
+ * @pdh_address: PDH certificate address
+ * @pdh_len: length of PDH certificate
+ * @cert_chain_address: PDH certificate chain
+ * @cert_chain_len: length of PDH certificate chain
+ */
+struct sev_user_data_pdh_cert_export {
+ __u64 pdh_cert_address; /* In */
+ __u32 pdh_cert_len; /* In/Out */
+ __u64 cert_chain_address; /* In */
+ __u32 cert_chain_len; /* In/Out */
+} __attribute__((packed));
+
+/**
+ * struct sev_issue_cmd - SEV ioctl parameters
+ *
+ * @cmd: SEV commands to execute
+ * @opaque: pointer to the command structure
+ * @error: SEV FW return code on failure
+ */
+struct sev_issue_cmd {
+ __u32 cmd; /* In */
+ __u64 data; /* In */
+ __u32 error; /* Out */
+} __attribute__((packed));
+
+#define SEV_IOC_TYPE 'S'
+#define SEV_ISSUE_CMD _IOWR(SEV_IOC_TYPE, 0x0, struct sev_issue_cmd)
+
+#endif /* __PSP_USER_SEV_H */
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread
* [PATCH v8 24/28] sev/i386: add support to query PLATFORM_STATUS command
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
` (23 preceding siblings ...)
(?)
@ 2018-02-12 15:37 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
The command is used to query the SEV API version and build id.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
target/i386/sev.c | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/target/i386/sev.c b/target/i386/sev.c
index 197b00313a2c..6df5db3eb2d7 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -21,6 +21,9 @@
#include "trace.h"
#include "qapi-event.h"
+#include <sys/ioctl.h>
+#include <linux/psp-sev.h>
+
#define DEFAULT_GUEST_POLICY 0x1 /* disable debug */
#define DEFAULT_SEV_DEVICE "/dev/sev"
#define GUEST_POLICY_DBG_BIT 0x1
@@ -91,6 +94,22 @@ sev_ioctl(int cmd, void *data, int *error)
return r;
}
+static int
+sev_platform_ioctl(int cmd, void *data, int *error)
+{
+ int r;
+ struct sev_issue_cmd arg;
+
+ arg.cmd = cmd;
+ arg.data = (unsigned long)data;
+ r = ioctl(sev_fd, SEV_ISSUE_CMD, &arg);
+ if (error) {
+ *error = arg.error;
+ }
+
+ return r;
+}
+
static const char *
fw_error_to_str(int code)
{
@@ -380,6 +399,20 @@ sev_enabled(void)
void
sev_get_fw_version(uint8_t *major, uint8_t *minor, uint8_t *build)
{
+ struct sev_user_data_status status = {};
+ int r, err;
+
+ r = sev_platform_ioctl(SEV_PLATFORM_STATUS, &status, &err);
+ if (r) {
+ error_report("%s: failed to get platform status ret=%d"
+ "fw_error='%d: %s'", __func__, r, err,
+ fw_error_to_str(err));
+ return;
+ }
+
+ *major = status.api_major;
+ *minor = status.api_minor;
+ *build = status.build;
}
void
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [PATCH v8 25/28] sev/i386: add support to KVM_SEV_GUEST_STATUS
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:37 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
The command is used to query the current SEV guest status. We use this
command to query the guest policy for QMP query-sev command.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
target/i386/sev.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/target/i386/sev.c b/target/i386/sev.c
index 6df5db3eb2d7..2713e3591d40 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -418,6 +418,22 @@ sev_get_fw_version(uint8_t *major, uint8_t *minor, uint8_t *build)
void
sev_get_policy(uint32_t *policy)
{
+ struct kvm_sev_guest_status status = {};
+ int r, err;
+
+ if (current_sev_guest_state == SEV_STATE_UNINIT) {
+ return;
+ }
+
+ r = sev_ioctl(KVM_SEV_GUEST_STATUS, &status, &err);
+ if (r) {
+ error_report("%s: failed to get platform status ret=%d "
+ "fw_error='%d: %s'", __func__, r, err,
+ fw_error_to_str(err));
+ return;
+ }
+
+ *policy = status.policy;
}
static int
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 25/28] sev/i386: add support to KVM_SEV_GUEST_STATUS
@ 2018-02-12 15:37 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh, Richard Henderson
The command is used to query the current SEV guest status. We use this
command to query the guest policy for QMP query-sev command.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
target/i386/sev.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/target/i386/sev.c b/target/i386/sev.c
index 6df5db3eb2d7..2713e3591d40 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -418,6 +418,22 @@ sev_get_fw_version(uint8_t *major, uint8_t *minor, uint8_t *build)
void
sev_get_policy(uint32_t *policy)
{
+ struct kvm_sev_guest_status status = {};
+ int r, err;
+
+ if (current_sev_guest_state == SEV_STATE_UNINIT) {
+ return;
+ }
+
+ r = sev_ioctl(KVM_SEV_GUEST_STATUS, &status, &err);
+ if (r) {
+ error_report("%s: failed to get platform status ret=%d "
+ "fw_error='%d: %s'", __func__, r, err,
+ fw_error_to_str(err));
+ return;
+ }
+
+ *policy = status.policy;
}
static int
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread
* [PATCH v8 26/28] qmp: add query-sev-launch-measure command
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:37 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
The command can be used by libvirt to retrieve the measurement of SEV guest.
This measurement is a signature of the memory contents that was encrypted
through the LAUNCH_UPDATE_DATA.
Cc: "Daniel P. Berrangé" <berrange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
qapi-schema.json | 29 +++++++++++++++++++++++++++++
qmp.c | 17 +++++++++++++++++
2 files changed, 46 insertions(+)
diff --git a/qapi-schema.json b/qapi-schema.json
index 9203e28b8aee..5e4836ef9c8b 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -3236,3 +3236,32 @@
#
##
{ 'command': 'query-sev', 'returns': 'SevInfo' }
+
+##
+# @SevLaunchMeasureInfo:
+#
+# SEV Guest Launch measurement information
+#
+# @data: the measurement value encoded in base64
+#
+# Since: 2.12
+#
+##
+{ 'struct': 'SevLaunchMeasureInfo', 'data': {'data': 'str'} }
+
+##
+# @query-sev-launch-measure:
+#
+# Query the SEV guest launch information.
+#
+# Returns: The @SevLaunchMeasureInfo for the guest
+#
+# Since: 2.12
+#
+# Example:
+#
+# -> { "execute": "query-sev-launch-measure" }
+# <- { "return": { "data": "4l8LXeNlSPUDlXPJG5966/8%YZ" } }
+#
+##
+{ 'command': 'query-sev-launch-measure', 'returns': 'SevLaunchMeasureInfo' }
diff --git a/qmp.c b/qmp.c
index 7907e539c8f2..0b994f1d9cd7 100644
--- a/qmp.c
+++ b/qmp.c
@@ -735,3 +735,20 @@ SevInfo *qmp_query_sev(Error **errp)
return info;
}
+
+SevLaunchMeasureInfo *qmp_query_sev_launch_measure(Error **errp)
+{
+ char *data;
+ SevLaunchMeasureInfo *info;
+
+ data = sev_get_launch_measurement();
+ if (!data) {
+ error_setg(errp, "Measurement is not available");
+ return NULL;
+ }
+
+ info = g_malloc0(sizeof(*info));
+ info->data = data;
+
+ return info;
+}
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 26/28] qmp: add query-sev-launch-measure command
@ 2018-02-12 15:37 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh
The command can be used by libvirt to retrieve the measurement of SEV guest.
This measurement is a signature of the memory contents that was encrypted
through the LAUNCH_UPDATE_DATA.
Cc: "Daniel P. Berrangé" <berrange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
qapi-schema.json | 29 +++++++++++++++++++++++++++++
qmp.c | 17 +++++++++++++++++
2 files changed, 46 insertions(+)
diff --git a/qapi-schema.json b/qapi-schema.json
index 9203e28b8aee..5e4836ef9c8b 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -3236,3 +3236,32 @@
#
##
{ 'command': 'query-sev', 'returns': 'SevInfo' }
+
+##
+# @SevLaunchMeasureInfo:
+#
+# SEV Guest Launch measurement information
+#
+# @data: the measurement value encoded in base64
+#
+# Since: 2.12
+#
+##
+{ 'struct': 'SevLaunchMeasureInfo', 'data': {'data': 'str'} }
+
+##
+# @query-sev-launch-measure:
+#
+# Query the SEV guest launch information.
+#
+# Returns: The @SevLaunchMeasureInfo for the guest
+#
+# Since: 2.12
+#
+# Example:
+#
+# -> { "execute": "query-sev-launch-measure" }
+# <- { "return": { "data": "4l8LXeNlSPUDlXPJG5966/8%YZ" } }
+#
+##
+{ 'command': 'query-sev-launch-measure', 'returns': 'SevLaunchMeasureInfo' }
diff --git a/qmp.c b/qmp.c
index 7907e539c8f2..0b994f1d9cd7 100644
--- a/qmp.c
+++ b/qmp.c
@@ -735,3 +735,20 @@ SevInfo *qmp_query_sev(Error **errp)
return info;
}
+
+SevLaunchMeasureInfo *qmp_query_sev_launch_measure(Error **errp)
+{
+ char *data;
+ SevLaunchMeasureInfo *info;
+
+ data = sev_get_launch_measurement();
+ if (!data) {
+ error_setg(errp, "Measurement is not available");
+ return NULL;
+ }
+
+ info = g_malloc0(sizeof(*info));
+ info->data = data;
+
+ return info;
+}
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread
* [PATCH v8 27/28] tests/qmp-test: blacklist query-sev-launch-measure command
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:37 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
The query-sev-launch-measure command returns a measurement of encrypted
memory when SEV is enabled otherwise it returns an error. Blacklist the
command in qmp-test to fix the 'make check' failure.
Cc: "Daniel P. Berrangé" <berrange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
tests/qmp-test.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/tests/qmp-test.c b/tests/qmp-test.c
index 908f9b981f6e..d8720798ad0b 100644
--- a/tests/qmp-test.c
+++ b/tests/qmp-test.c
@@ -202,6 +202,8 @@ static bool query_is_blacklisted(const char *cmd)
"query-gic-capabilities", /* arm */
/* Success depends on target-specific build configuration: */
"query-pci", /* CONFIG_PCI */
+ /* Success depends on launching SEV guest */
+ "query-sev-launch-measure",
NULL
};
int i;
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 27/28] tests/qmp-test: blacklist query-sev-launch-measure command
@ 2018-02-12 15:37 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh
The query-sev-launch-measure command returns a measurement of encrypted
memory when SEV is enabled otherwise it returns an error. Blacklist the
command in qmp-test to fix the 'make check' failure.
Cc: "Daniel P. Berrangé" <berrange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
tests/qmp-test.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/tests/qmp-test.c b/tests/qmp-test.c
index 908f9b981f6e..d8720798ad0b 100644
--- a/tests/qmp-test.c
+++ b/tests/qmp-test.c
@@ -202,6 +202,8 @@ static bool query_is_blacklisted(const char *cmd)
"query-gic-capabilities", /* arm */
/* Success depends on target-specific build configuration: */
"query-pci", /* CONFIG_PCI */
+ /* Success depends on launching SEV guest */
+ "query-sev-launch-measure",
NULL
};
int i;
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* Re: [PATCH v8 27/28] tests/qmp-test: blacklist query-sev-launch-measure command
2018-02-12 15:37 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-13 16:44 ` Dr. David Alan Gilbert
-1 siblings, 0 replies; 77+ messages in thread
From: Dr. David Alan Gilbert @ 2018-02-13 16:44 UTC (permalink / raw)
To: Brijesh Singh
Cc: qemu-devel, Alistair Francis, Christian Borntraeger,
Cornelia Huck, Daniel P . Berrange, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov, Alexande
* Brijesh Singh (brijesh.singh@amd.com) wrote:
> The query-sev-launch-measure command returns a measurement of encrypted
> memory when SEV is enabled otherwise it returns an error. Blacklist the
> command in qmp-test to fix the 'make check' failure.
>
> Cc: "Daniel P. Berrangé" <berrange@redhat.com>
> Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
> Cc: Markus Armbruster <armbru@redhat.com>
> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> ---
> tests/qmp-test.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/tests/qmp-test.c b/tests/qmp-test.c
> index 908f9b981f6e..d8720798ad0b 100644
> --- a/tests/qmp-test.c
> +++ b/tests/qmp-test.c
> @@ -202,6 +202,8 @@ static bool query_is_blacklisted(const char *cmd)
> "query-gic-capabilities", /* arm */
> /* Success depends on target-specific build configuration: */
> "query-pci", /* CONFIG_PCI */
> + /* Success depends on launching SEV guest */
> + "query-sev-launch-measure",
> NULL
> };
> int i;
> --
> 2.14.3
>
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
^ permalink raw reply [flat|nested] 77+ messages in thread
* Re: [Qemu-devel] [PATCH v8 27/28] tests/qmp-test: blacklist query-sev-launch-measure command
@ 2018-02-13 16:44 ` Dr. David Alan Gilbert
0 siblings, 0 replies; 77+ messages in thread
From: Dr. David Alan Gilbert @ 2018-02-13 16:44 UTC (permalink / raw)
To: Brijesh Singh
Cc: qemu-devel, Alistair Francis, Christian Borntraeger,
Cornelia Huck, Daniel P . Berrange, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers
* Brijesh Singh (brijesh.singh@amd.com) wrote:
> The query-sev-launch-measure command returns a measurement of encrypted
> memory when SEV is enabled otherwise it returns an error. Blacklist the
> command in qmp-test to fix the 'make check' failure.
>
> Cc: "Daniel P. Berrangé" <berrange@redhat.com>
> Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
> Cc: Markus Armbruster <armbru@redhat.com>
> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> ---
> tests/qmp-test.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/tests/qmp-test.c b/tests/qmp-test.c
> index 908f9b981f6e..d8720798ad0b 100644
> --- a/tests/qmp-test.c
> +++ b/tests/qmp-test.c
> @@ -202,6 +202,8 @@ static bool query_is_blacklisted(const char *cmd)
> "query-gic-capabilities", /* arm */
> /* Success depends on target-specific build configuration: */
> "query-pci", /* CONFIG_PCI */
> + /* Success depends on launching SEV guest */
> + "query-sev-launch-measure",
> NULL
> };
> int i;
> --
> 2.14.3
>
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
^ permalink raw reply [flat|nested] 77+ messages in thread
* [PATCH v8 28/28] sev/i386: add migration blocker
2018-02-12 15:36 ` [Qemu-devel] " Brijesh Singh
@ 2018-02-12 15:37 ` Brijesh Singh
-1 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav
SEV guest migration is not implemented yet.
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
target/i386/sev.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/target/i386/sev.c b/target/i386/sev.c
index 2713e3591d40..4029299ace6e 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -20,6 +20,7 @@
#include "sysemu/sysemu.h"
#include "trace.h"
#include "qapi-event.h"
+#include "migration/blocker.h"
#include <sys/ioctl.h>
#include <linux/psp-sev.h>
@@ -33,6 +34,7 @@ static bool sev_active;
static int sev_fd;
static SEVState *sev_state;
static MemoryRegionRAMReadWriteOps sev_ops;
+static Error *sev_mig_blocker;
#define SEV_FW_MAX_ERROR 0x17
@@ -603,6 +605,7 @@ static void
sev_launch_finish(SEVState *s)
{
int ret, error;
+ Error *local_err = NULL;
trace_kvm_sev_launch_finish();
ret = sev_ioctl(KVM_SEV_LAUNCH_FINISH, 0, &error);
@@ -613,6 +616,16 @@ sev_launch_finish(SEVState *s)
}
sev_set_guest_state(SEV_STATE_RUNNING);
+
+ /* add migration blocker */
+ error_setg(&sev_mig_blocker,
+ "SEV: Migration is not implemented");
+ ret = migrate_add_blocker(sev_mig_blocker, &local_err);
+ if (local_err) {
+ error_report_err(local_err);
+ error_free(sev_mig_blocker);
+ exit(1);
+ }
}
static void
--
2.14.3
^ permalink raw reply related [flat|nested] 77+ messages in thread* [Qemu-devel] [PATCH v8 28/28] sev/i386: add migration blocker
@ 2018-02-12 15:37 ` Brijesh Singh
0 siblings, 0 replies; 77+ messages in thread
From: Brijesh Singh @ 2018-02-12 15:37 UTC (permalink / raw)
To: qemu-devel
Cc: Alistair Francis, Christian Borntraeger, Cornelia Huck,
Daniel P . Berrange, Dr. David Alan Gilbert, Michael S. Tsirkin,
Edgar E. Iglesias, Eduardo Habkost, Eric Blake, kvm,
Marcel Apfelbaum, Markus Armbruster, Paolo Bonzini,
Peter Crosthwaite, Peter Maydell, Richard Henderson,
Stefan Hajnoczi, Thomas Lendacky, Borislav Petkov,
Alexander Graf, Bruce Rogers, Brijesh Singh
SEV guest migration is not implemented yet.
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
target/i386/sev.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/target/i386/sev.c b/target/i386/sev.c
index 2713e3591d40..4029299ace6e 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -20,6 +20,7 @@
#include "sysemu/sysemu.h"
#include "trace.h"
#include "qapi-event.h"
+#include "migration/blocker.h"
#include <sys/ioctl.h>
#include <linux/psp-sev.h>
@@ -33,6 +34,7 @@ static bool sev_active;
static int sev_fd;
static SEVState *sev_state;
static MemoryRegionRAMReadWriteOps sev_ops;
+static Error *sev_mig_blocker;
#define SEV_FW_MAX_ERROR 0x17
@@ -603,6 +605,7 @@ static void
sev_launch_finish(SEVState *s)
{
int ret, error;
+ Error *local_err = NULL;
trace_kvm_sev_launch_finish();
ret = sev_ioctl(KVM_SEV_LAUNCH_FINISH, 0, &error);
@@ -613,6 +616,16 @@ sev_launch_finish(SEVState *s)
}
sev_set_guest_state(SEV_STATE_RUNNING);
+
+ /* add migration blocker */
+ error_setg(&sev_mig_blocker,
+ "SEV: Migration is not implemented");
+ ret = migrate_add_blocker(sev_mig_blocker, &local_err);
+ if (local_err) {
+ error_report_err(local_err);
+ error_free(sev_mig_blocker);
+ exit(1);
+ }
}
static void
--
2.14.3
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