[PULL 00/46] Misc patches for 2021-02-08

[PULL 00/46] Misc patches for 2021-02-08

[Paolo Bonzini]

The following changes since commit 6f0e9c26dbae9ac18b89d359791008fe3432ca91:

  Merge remote-tracking branch 'remotes/dg-gitlab/tags/cgs-pull-request' into staging (2021-02-08 11:11:26 +0000)

are available in the Git repository at:

  https://gitlab.com/bonzini/qemu.git tags/for-upstream

for you to fetch changes up to 52a44ad2b92ba4cd81c2b271cd5e4a2d820e91fc:

  target/i386: Expose VMX entry/exit load pkrs control bits (2021-02-08 15:15:32 +0100)

----------------------------------------------------------------
* Fuzzing improvements (Qiuhao, Alexander)
* i386: Fix BMI decoding for instructions with the 0x66 prefix (David)
* initial attempt at fixing event_notifier emulation (Maxim)
* i386: PKS emulation, fix for "qemu-system-i386 -cpu host" (myself)
* meson: RBD test fixes (myself)
* meson: TCI warnings (Philippe)
* Leaner build for --disable-guest-agent, --disable-system and
  --disable-tools (Philippe, Stefan)
* --enable-tcg-interpreter fix (Richard)
* i386: SVM feature bits (Wei)
* KVM bugfix (Thomas H.)
* Add missing MemoryRegionOps callbacks (PJP)

----------------------------------------------------------------
Alexander Bulekov (7):
      fuzz: ignore address_space_map is_write flag
      fuzz: refine the ide/ahci fuzzer configs
      docs/fuzz: fix pre-meson path
      fuzz: log the arguments used to initialize QEMU
      fuzz: enable dynamic args for generic-fuzz configs
      docs/fuzz: add some information about OSS-Fuzz
      fuzz: add virtio-9p configurations for fuzzing

Chenyi Qiang (2):
      target/i386: Add support for save/load IA32_PKRS MSR
      target/i386: Expose VMX entry/exit load pkrs control bits

David Greenaway (1):
      target/i386: Fix decoding of certain BMI instructions

Igor Mammedov (1):
      machine: add missing doc for memory-backend option

Maxim Levitsky (2):
      virtio-scsi: don't uninitialize queues that we didn't initialize
      event_notifier: handle initialization failure better

Paolo Bonzini (4):
      target/i386: do not set LM for 32-bit emulation "-cpu host/max"
      meson: accept either shared or static libraries if --disable-static
      meson: honor --enable-rbd if cc.links test fails
      target/i86: implement PKS

Pavel Dovgalyuk (2):
      replay: fix replay of the interrupts
      replay: rng-builtin support

Philippe Mathieu-Daudé (13):
      configure: Improve TCI feature description
      meson: Explicit TCG backend used
      meson: Warn when TCI is selected but TCG backend is available
      tests/meson: Only build softfloat objects if TCG is selected
      pc-bios/meson: Only install EDK2 blob firmwares with system emulation
      meson: Restrict block subsystem processing
      meson: Merge trace_events_subdirs array
      meson: Restrict some trace event directories to user/system emulation
      meson: Restrict emulation code
      qapi/meson: Restrict qdev code to system-mode emulation
      qapi/meson: Remove QMP from user-mode emulation
      qapi/meson: Restrict system-mode specific modules
      qapi/meson: Restrict UI module to system emulation and tools

Prasad J Pandit (8):
      hw/pci-host: add pci-intack write method
      pci-host: designware: add pcie-msi read method
      vfio: add quirk device write method
      prep: add ppc-parity write method
      nvram: add nrf51_soc flash read method
      spapr_pci: add spapr msi read method
      tz-ppc: add dummy read/write methods
      imx7-ccm: add digprog mmio write method

Qiuhao Li (1):
      fuzz: fix wrong index in clear_bits

Sergei Trofimovich (1):
      pc-bios/descriptors: fix paths in json files

Stefan Reiter (1):
      docs: don't install corresponding man page if guest agent is disabled

Thomas Huth (1):
      accel/kvm/kvm-all: Fix wrong return code handling in dirty log code

Utkarsh Tripathi (1):
      cpu-throttle: Remove timer_mod() from cpu_throttle_set()

Wei Huang (1):
      x86/cpu: Populate SVM CPUID feature bits

 MAINTAINERS                              |   1 +
 accel/kvm/kvm-all.c                      |  21 +--
 accel/tcg/tcg-accel-ops-icount.c         |   8 +-
 backends/hostmem.c                       |  10 ++
 backends/rng-builtin.c                   |   3 +-
 configure                                |   2 +-
 docs/devel/build-system.rst              |   2 +-
 docs/devel/fuzzing.rst                   |  35 ++++-
 docs/meson.build                         |   6 +-
 hw/misc/imx7_ccm.c                       |   8 ++
 hw/misc/tz-ppc.c                         |  14 ++
 hw/nvram/nrf51_nvm.c                     |  10 ++
 hw/pci-host/designware.c                 |  19 +++
 hw/pci-host/prep.c                       |   8 ++
 hw/ppc/prep_systemio.c                   |   8 ++
 hw/ppc/spapr_pci.c                       |  14 +-
 hw/scsi/virtio-scsi-dataplane.c          |   8 +-
 hw/vfio/pci-quirks.c                     |   8 ++
 include/exec/memory.h                    |   8 +-
 include/exec/memory_ldst_cached.h.inc    |   6 +-
 include/qemu/event_notifier.h            |   1 +
 memory_ldst.c.inc                        |   8 +-
 meson.build                              | 214 +++++++++++++++++--------------
 meson_options.txt                        |   2 +-
 pc-bios/descriptors/meson.build          |   2 +-
 pc-bios/meson.build                      |   1 +
 qapi/meson.build                         |  34 +++--
 qemu-options.hx                          |  26 +++-
 scripts/oss-fuzz/minimize_qtest_trace.py |   2 +-
 softmmu/cpu-throttle.c                   |  11 +-
 softmmu/memory.c                         |   5 +-
 softmmu/physmem.c                        |   4 +-
 stubs/meson.build                        |   2 +
 stubs/qdev.c                             |  23 ++++
 target/i386/cpu.c                        |  19 ++-
 target/i386/cpu.h                        |  31 +++--
 target/i386/helper.c                     |   3 +
 target/i386/kvm/kvm.c                    |  13 ++
 target/i386/machine.c                    |  24 +++-
 target/i386/tcg/excp_helper.c            |  32 +++--
 target/i386/tcg/misc_helper.c            |  14 ++
 target/i386/tcg/translate.c              |   2 +-
 tests/meson.build                        |  11 +-
 tests/qtest/fuzz/fuzz.c                  |  11 +-
 tests/qtest/fuzz/generic_fuzz.c          |  19 ++-
 tests/qtest/fuzz/generic_fuzz_configs.h  |  41 +++++-
 util/event_notifier-posix.c              |  16 +++
 47 files changed, 576 insertions(+), 194 deletions(-)
 create mode 100644 stubs/qdev.c
-- 
2.29.2

[PULL 01/46] fuzz: ignore address_space_map is_write flag

[Paolo Bonzini]

From: Alexander Bulekov <alxndr@bu.edu>

We passed an is_write flag to the fuzz_dma_read_cb function to
differentiate between the mapped DMA regions that need to be populated
with fuzzed data, and those that don't. We simply passed through the
address_space_map is_write parameter. The goal was to cut down on
unnecessarily populating mapped DMA regions, when they are not read
from.

Unfortunately, nothing precludes code from reading from regions mapped
with is_write=true. For example, see:
https://lists.gnu.org/archive/html/qemu-devel/2021-01/msg04729.html

This patch removes the is_write parameter to fuzz_dma_read_cb. As a
result, we will fill all mapped DMA regions with fuzzed data, ignoring
the specified transfer direction.

Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Message-Id: <20210120060255.558535-1-alxndr@bu.edu>
---
 include/exec/memory.h                 | 8 +++-----
 include/exec/memory_ldst_cached.h.inc | 6 +++---
 memory_ldst.c.inc                     | 8 ++++----
 softmmu/memory.c                      | 5 ++---
 softmmu/physmem.c                     | 4 ++--
 tests/qtest/fuzz/generic_fuzz.c       | 9 +++------
 6 files changed, 17 insertions(+), 23 deletions(-)

diff --git a/include/exec/memory.h b/include/exec/memory.h
index c6ce74fb79..ecba90bfd8 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -45,13 +45,11 @@ DECLARE_OBJ_CHECKERS(IOMMUMemoryRegion, IOMMUMemoryRegionClass,
 #ifdef CONFIG_FUZZ
 void fuzz_dma_read_cb(size_t addr,
                       size_t len,
-                      MemoryRegion *mr,
-                      bool is_write);
+                      MemoryRegion *mr);
 #else
 static inline void fuzz_dma_read_cb(size_t addr,
                                     size_t len,
-                                    MemoryRegion *mr,
-                                    bool is_write)
+                                    MemoryRegion *mr)
 {
     /* Do Nothing */
 }
@@ -2506,7 +2504,7 @@ address_space_read_cached(MemoryRegionCache *cache, hwaddr addr,
                           void *buf, hwaddr len)
 {
     assert(addr < cache->len && len <= cache->len - addr);
-    fuzz_dma_read_cb(cache->xlat + addr, len, cache->mrs.mr, false);
+    fuzz_dma_read_cb(cache->xlat + addr, len, cache->mrs.mr);
     if (likely(cache->ptr)) {
         memcpy(buf, cache->ptr + addr, len);
         return MEMTX_OK;
diff --git a/include/exec/memory_ldst_cached.h.inc b/include/exec/memory_ldst_cached.h.inc
index 01efad62de..7bc8790d34 100644
--- a/include/exec/memory_ldst_cached.h.inc
+++ b/include/exec/memory_ldst_cached.h.inc
@@ -28,7 +28,7 @@ static inline uint32_t ADDRESS_SPACE_LD_CACHED(l)(MemoryRegionCache *cache,
     hwaddr addr, MemTxAttrs attrs, MemTxResult *result)
 {
     assert(addr < cache->len && 4 <= cache->len - addr);
-    fuzz_dma_read_cb(cache->xlat + addr, 4, cache->mrs.mr, false);
+    fuzz_dma_read_cb(cache->xlat + addr, 4, cache->mrs.mr);
     if (likely(cache->ptr)) {
         return LD_P(l)(cache->ptr + addr);
     } else {
@@ -40,7 +40,7 @@ static inline uint64_t ADDRESS_SPACE_LD_CACHED(q)(MemoryRegionCache *cache,
     hwaddr addr, MemTxAttrs attrs, MemTxResult *result)
 {
     assert(addr < cache->len && 8 <= cache->len - addr);
-    fuzz_dma_read_cb(cache->xlat + addr, 8, cache->mrs.mr, false);
+    fuzz_dma_read_cb(cache->xlat + addr, 8, cache->mrs.mr);
     if (likely(cache->ptr)) {
         return LD_P(q)(cache->ptr + addr);
     } else {
@@ -52,7 +52,7 @@ static inline uint32_t ADDRESS_SPACE_LD_CACHED(uw)(MemoryRegionCache *cache,
     hwaddr addr, MemTxAttrs attrs, MemTxResult *result)
 {
     assert(addr < cache->len && 2 <= cache->len - addr);
-    fuzz_dma_read_cb(cache->xlat + addr, 2, cache->mrs.mr, false);
+    fuzz_dma_read_cb(cache->xlat + addr, 2, cache->mrs.mr);
     if (likely(cache->ptr)) {
         return LD_P(uw)(cache->ptr + addr);
     } else {
diff --git a/memory_ldst.c.inc b/memory_ldst.c.inc
index 2fed2de18e..b56e961967 100644
--- a/memory_ldst.c.inc
+++ b/memory_ldst.c.inc
@@ -42,7 +42,7 @@ static inline uint32_t glue(address_space_ldl_internal, SUFFIX)(ARG1_DECL,
                                         MO_32 | devend_memop(endian), attrs);
     } else {
         /* RAM case */
-        fuzz_dma_read_cb(addr, 4, mr, false);
+        fuzz_dma_read_cb(addr, 4, mr);
         ptr = qemu_map_ram_ptr(mr->ram_block, addr1);
         switch (endian) {
         case DEVICE_LITTLE_ENDIAN:
@@ -111,7 +111,7 @@ static inline uint64_t glue(address_space_ldq_internal, SUFFIX)(ARG1_DECL,
                                         MO_64 | devend_memop(endian), attrs);
     } else {
         /* RAM case */
-        fuzz_dma_read_cb(addr, 8, mr, false);
+        fuzz_dma_read_cb(addr, 8, mr);
         ptr = qemu_map_ram_ptr(mr->ram_block, addr1);
         switch (endian) {
         case DEVICE_LITTLE_ENDIAN:
@@ -177,7 +177,7 @@ uint32_t glue(address_space_ldub, SUFFIX)(ARG1_DECL,
         r = memory_region_dispatch_read(mr, addr1, &val, MO_8, attrs);
     } else {
         /* RAM case */
-        fuzz_dma_read_cb(addr, 1, mr, false);
+        fuzz_dma_read_cb(addr, 1, mr);
         ptr = qemu_map_ram_ptr(mr->ram_block, addr1);
         val = ldub_p(ptr);
         r = MEMTX_OK;
@@ -215,7 +215,7 @@ static inline uint32_t glue(address_space_lduw_internal, SUFFIX)(ARG1_DECL,
                                         MO_16 | devend_memop(endian), attrs);
     } else {
         /* RAM case */
-        fuzz_dma_read_cb(addr, 2, mr, false);
+        fuzz_dma_read_cb(addr, 2, mr);
         ptr = qemu_map_ram_ptr(mr->ram_block, addr1);
         switch (endian) {
         case DEVICE_LITTLE_ENDIAN:
diff --git a/softmmu/memory.c b/softmmu/memory.c
index c0c814fbb9..23e8e33001 100644
--- a/softmmu/memory.c
+++ b/softmmu/memory.c
@@ -1440,7 +1440,7 @@ MemTxResult memory_region_dispatch_read(MemoryRegion *mr,
     unsigned size = memop_size(op);
     MemTxResult r;
 
-    fuzz_dma_read_cb(addr, size, mr, false);
+    fuzz_dma_read_cb(addr, size, mr);
     if (!memory_region_access_valid(mr, addr, size, false, attrs)) {
         *pval = unassigned_mem_read(mr, addr, size);
         return MEMTX_DECODE_ERROR;
@@ -3285,8 +3285,7 @@ void memory_region_init_rom_device(MemoryRegion *mr,
 #ifdef CONFIG_FUZZ
 void __attribute__((weak)) fuzz_dma_read_cb(size_t addr,
                       size_t len,
-                      MemoryRegion *mr,
-                      bool is_write)
+                      MemoryRegion *mr)
 {
 }
 #endif
diff --git a/softmmu/physmem.c b/softmmu/physmem.c
index 243c3097d3..96efaef97a 100644
--- a/softmmu/physmem.c
+++ b/softmmu/physmem.c
@@ -2839,7 +2839,7 @@ MemTxResult flatview_read_continue(FlatView *fv, hwaddr addr,
             stn_he_p(buf, l, val);
         } else {
             /* RAM case */
-            fuzz_dma_read_cb(addr, len, mr, false);
+            fuzz_dma_read_cb(addr, len, mr);
             ram_ptr = qemu_ram_ptr_length(mr->ram_block, addr1, &l, false);
             memcpy(buf, ram_ptr, l);
         }
@@ -3200,7 +3200,7 @@ void *address_space_map(AddressSpace *as,
     memory_region_ref(mr);
     *plen = flatview_extend_translation(fv, addr, len, mr, xlat,
                                         l, is_write, attrs);
-    fuzz_dma_read_cb(addr, *plen, mr, is_write);
+    fuzz_dma_read_cb(addr, *plen, mr);
     ptr = qemu_ram_ptr_length(mr->ram_block, xlat, plen, true);
 
     return ptr;
diff --git a/tests/qtest/fuzz/generic_fuzz.c b/tests/qtest/fuzz/generic_fuzz.c
index be76d47d2d..deb74f15be 100644
--- a/tests/qtest/fuzz/generic_fuzz.c
+++ b/tests/qtest/fuzz/generic_fuzz.c
@@ -175,7 +175,7 @@ static int memory_access_size(MemoryRegion *mr, unsigned l, hwaddr addr)
  * generic_fuzz(), avoiding potential race-conditions, which we don't have
  * a good way for reproducing right now.
  */
-void fuzz_dma_read_cb(size_t addr, size_t len, MemoryRegion *mr, bool is_write)
+void fuzz_dma_read_cb(size_t addr, size_t len, MemoryRegion *mr)
 {
     /* Are we in the generic-fuzzer or are we using another fuzz-target? */
     if (!qts_global) {
@@ -187,14 +187,11 @@ void fuzz_dma_read_cb(size_t addr, size_t len, MemoryRegion *mr, bool is_write)
      * - We have no DMA patterns defined
      * - The length of the DMA read request is zero
      * - The DMA read is hitting an MR other than the machine's main RAM
-     * - The DMA request is not a read (what happens for a address_space_map
-     *   with is_write=True? Can the device use the same pointer to do reads?)
      * - The DMA request hits past the bounds of our RAM
      */
     if (dma_patterns->len == 0
         || len == 0
         || mr != current_machine->ram
-        || is_write
         || addr > current_machine->ram_size) {
         return;
     }
@@ -213,12 +210,12 @@ void fuzz_dma_read_cb(size_t addr, size_t len, MemoryRegion *mr, bool is_write)
             double_fetch = true;
             if (addr < region.addr
                 && avoid_double_fetches) {
-                fuzz_dma_read_cb(addr, region.addr - addr, mr, is_write);
+                fuzz_dma_read_cb(addr, region.addr - addr, mr);
             }
             if (addr + len > region.addr + region.size
                 && avoid_double_fetches) {
                 fuzz_dma_read_cb(region.addr + region.size,
-                        addr + len - (region.addr + region.size), mr, is_write);
+                        addr + len - (region.addr + region.size), mr);
             }
             return;
         }
-- 
2.29.2

[PULL 02/46] fuzz: refine the ide/ahci fuzzer configs

[Paolo Bonzini]

From: Alexander Bulekov <alxndr@bu.edu>

Disks work differently depending on the x86 machine type (SATA vs PATA).
Additionally, we should fuzz the atapi code paths, which might contain
vulnerabilities such as CVE-2020-29443. This patch adds hard-disk and
cdrom generic-fuzzer configs for both the pc (PATA) and q35 (SATA)
machine types.

Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Acked-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Message-Id: <20210120152211.109782-1-alxndr@bu.edu>
---
 tests/qtest/fuzz/generic_fuzz_configs.h | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/tests/qtest/fuzz/generic_fuzz_configs.h b/tests/qtest/fuzz/generic_fuzz_configs.h
index 7fed035345..aa4c03f1ae 100644
--- a/tests/qtest/fuzz/generic_fuzz_configs.h
+++ b/tests/qtest/fuzz/generic_fuzz_configs.h
@@ -85,10 +85,28 @@ const generic_fuzz_config predefined_configs[] = {
         .objects = "intel-hda",
     },{
         .name = "ide-hd",
+        .args = "-machine pc -nodefaults "
+        "-drive file=null-co://,if=none,format=raw,id=disk0 "
+        "-device ide-hd,drive=disk0",
+        .objects = "*ide*",
+    },{
+        .name = "ide-atapi",
+        .args = "-machine pc -nodefaults "
+        "-drive file=null-co://,if=none,format=raw,id=disk0 "
+        "-device ide-cd,drive=disk0",
+        .objects = "*ide*",
+    },{
+        .name = "ahci-hd",
         .args = "-machine q35 -nodefaults "
         "-drive file=null-co://,if=none,format=raw,id=disk0 "
         "-device ide-hd,drive=disk0",
-        .objects = "ahci*",
+        .objects = "*ahci*",
+    },{
+        .name = "ahci-atapi",
+        .args = "-machine q35 -nodefaults "
+        "-drive file=null-co://,if=none,format=raw,id=disk0 "
+        "-device ide-cd,drive=disk0",
+        .objects = "*ahci*",
     },{
         .name = "floppy",
         .args = "-machine pc -nodefaults -device floppy,id=floppy0 "
-- 
2.29.2

[PULL 03/46] docs/fuzz: fix pre-meson path

[Paolo Bonzini]

From: Alexander Bulekov <alxndr@bu.edu>

Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20210117201014.271610-2-alxndr@bu.edu>
---
 docs/devel/fuzzing.rst | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/docs/devel/fuzzing.rst b/docs/devel/fuzzing.rst
index 6096242d99..5f5200c843 100644
--- a/docs/devel/fuzzing.rst
+++ b/docs/devel/fuzzing.rst
@@ -119,7 +119,7 @@ Adding a new fuzzer
 
 Coverage over virtual devices can be improved by adding additional fuzzers.
 Fuzzers are kept in ``tests/qtest/fuzz/`` and should be added to
-``tests/qtest/fuzz/Makefile.include``
+``tests/qtest/fuzz/meson.build``
 
 Fuzzers can rely on both qtest and libqos to communicate with virtual devices.
 
@@ -128,8 +128,7 @@ Fuzzers can rely on both qtest and libqos to communicate with virtual devices.
 2. Write the fuzzing code using the libqtest/libqos API. See existing fuzzers
    for reference.
 
-3. Register the fuzzer in ``tests/fuzz/Makefile.include`` by appending the
-   corresponding object to fuzz-obj-y
+3. Add the fuzzer to ``tests/qtest/fuzz/meson.build``.
 
 Fuzzers can be more-or-less thought of as special qtest programs which can
 modify the qtest commands and/or qtest command arguments based on inputs
-- 
2.29.2

[PULL 04/46] fuzz: log the arguments used to initialize QEMU

[Paolo Bonzini]

From: Alexander Bulekov <alxndr@bu.edu>

This is useful for building reproducers. Instead checking the code or
the QEMU_FUZZ_ARGS, the arguments are at the top of the crash log.

Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20210117201014.271610-3-alxndr@bu.edu>
---
 tests/qtest/fuzz/fuzz.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/tests/qtest/fuzz/fuzz.c b/tests/qtest/fuzz/fuzz.c
index 238866a037..496d11a231 100644
--- a/tests/qtest/fuzz/fuzz.c
+++ b/tests/qtest/fuzz/fuzz.c
@@ -159,6 +159,8 @@ int LLVMFuzzerInitialize(int *argc, char ***argv, char ***envp)
     char *target_name;
     const char *bindir;
     char *datadir;
+    GString *cmd_line;
+    gchar *pretty_cmd_line;
     bool serialize = false;
 
     /* Initialize qgraph and modules */
@@ -217,7 +219,7 @@ int LLVMFuzzerInitialize(int *argc, char ***argv, char ***envp)
     }
 
     /* Run QEMU's softmmu main with the fuzz-target dependent arguments */
-    GString *cmd_line = fuzz_target->get_init_cmdline(fuzz_target);
+    cmd_line = fuzz_target->get_init_cmdline(fuzz_target);
     g_string_append_printf(cmd_line, " %s -qtest /dev/null ",
                            getenv("QTEST_LOG") ? "" : "-qtest-log none");
 
@@ -226,6 +228,13 @@ int LLVMFuzzerInitialize(int *argc, char ***argv, char ***envp)
     wordexp(cmd_line->str, &result, 0);
     g_string_free(cmd_line, true);
 
+    if (getenv("QTEST_LOG")) {
+        pretty_cmd_line  = g_strjoinv(" ", result.we_wordv + 1);
+        printf("Starting %s with Arguments: %s\n",
+                result.we_wordv[0], pretty_cmd_line);
+        g_free(pretty_cmd_line);
+    }
+
     qemu_init(result.we_wordc, result.we_wordv, NULL);
 
     /* re-enable the rcu atfork, which was previously disabled in qemu_init */
-- 
2.29.2

[PULL 05/46] fuzz: enable dynamic args for generic-fuzz configs

[Paolo Bonzini]

From: Alexander Bulekov <alxndr@bu.edu>

For some device configurations, it is useful to configure some
resources, and adjust QEMU arguments at runtime, prior to fuzzing. This
patch adds an "argfunc" to generic the generic_fuzz_config. When
specified, it is responsible for configuring the resources and returning
a string containing the corresponding QEMU arguments. This can be useful
for targets that rely on e.g.:
 * a temporary qcow2 image
 * a temporary directory
 * an unused TCP port used to bind the VNC server

Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20210117230924.449676-2-alxndr@bu.edu>
---
 tests/qtest/fuzz/generic_fuzz.c         | 10 +++++++++-
 tests/qtest/fuzz/generic_fuzz_configs.h |  1 +
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/tests/qtest/fuzz/generic_fuzz.c b/tests/qtest/fuzz/generic_fuzz.c
index deb74f15be..ee8c17a04c 100644
--- a/tests/qtest/fuzz/generic_fuzz.c
+++ b/tests/qtest/fuzz/generic_fuzz.c
@@ -933,12 +933,20 @@ static GString *generic_fuzz_cmdline(FuzzTarget *t)
 
 static GString *generic_fuzz_predefined_config_cmdline(FuzzTarget *t)
 {
+    gchar *args;
     const generic_fuzz_config *config;
     g_assert(t->opaque);
 
     config = t->opaque;
     setenv("QEMU_AVOID_DOUBLE_FETCH", "1", 1);
-    setenv("QEMU_FUZZ_ARGS", config->args, 1);
+    if (config->argfunc) {
+        args = config->argfunc();
+        setenv("QEMU_FUZZ_ARGS", args, 1);
+        g_free(args);
+    } else {
+        g_assert_nonnull(config->args);
+        setenv("QEMU_FUZZ_ARGS", config->args, 1);
+    }
     setenv("QEMU_FUZZ_OBJECTS", config->objects, 1);
     return generic_fuzz_cmdline(t);
 }
diff --git a/tests/qtest/fuzz/generic_fuzz_configs.h b/tests/qtest/fuzz/generic_fuzz_configs.h
index aa4c03f1ae..51e69c6e42 100644
--- a/tests/qtest/fuzz/generic_fuzz_configs.h
+++ b/tests/qtest/fuzz/generic_fuzz_configs.h
@@ -16,6 +16,7 @@
 
 typedef struct generic_fuzz_config {
     const char *name, *args, *objects;
+    gchar* (*argfunc)(void); /* Result must be freeable by g_free() */
 } generic_fuzz_config;
 
 const generic_fuzz_config predefined_configs[] = {
-- 
2.29.2

[PULL 06/46] docs/fuzz: add some information about OSS-Fuzz

[Paolo Bonzini]

From: Alexander Bulekov <alxndr@bu.edu>

Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Message-Id: <20210117230924.449676-3-alxndr@bu.edu>
---
 docs/devel/fuzzing.rst | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/docs/devel/fuzzing.rst b/docs/devel/fuzzing.rst
index 5f5200c843..97797c4f8c 100644
--- a/docs/devel/fuzzing.rst
+++ b/docs/devel/fuzzing.rst
@@ -180,6 +180,36 @@ To ensure that these env variables have been configured correctly, we can use::
 
 The output should contain a complete list of matched MemoryRegions.
 
+OSS-Fuzz
+--------
+QEMU is continuously fuzzed on `OSS-Fuzz` __(https://github.com/google/oss-fuzz).
+By default, the OSS-Fuzz build will try to fuzz every fuzz-target. Since the
+generic-fuzz target requires additional information provided in environment
+variables, we pre-define some generic-fuzz configs in
+``tests/qtest/fuzz/generic_fuzz_configs.h``. Each config must specify:
+
+- ``.name``: To identify the fuzzer config
+
+- ``.args`` OR ``.argfunc``: A string or pointer to a function returning a
+  string.  These strings are used to specify the ``QEMU_FUZZ_ARGS``
+  environment variable.  ``argfunc`` is useful when the config relies on e.g.
+  a dynamically created temp directory, or a free tcp/udp port.
+
+- ``.objects``: A string that specifies the ``QEMU_FUZZ_OBJECTS`` environment
+  variable.
+
+To fuzz additional devices/device configuration on OSS-Fuzz, send patches for
+either a new device-specific fuzzer or a new generic-fuzz config.
+
+Build details:
+
+- The Dockerfile that sets up the environment for building QEMU's
+  fuzzers on OSS-Fuzz can be fund in the OSS-Fuzz repository
+  __(https://github.com/google/oss-fuzz/blob/master/projects/qemu/Dockerfile)
+
+- The script responsible for building the fuzzers can be found in the
+  QEMU source tree at ``scripts/oss-fuzz/build.sh``
+
 Implementation Details / Fuzzer Lifecycle
 -----------------------------------------
 
-- 
2.29.2

[PULL 07/46] fuzz: add virtio-9p configurations for fuzzing

[Paolo Bonzini]

From: Alexander Bulekov <alxndr@bu.edu>

virtio-9p devices are often used to expose a virtual-filesystem to the
guest. There have been some bugs reported in this device, such as
CVE-2018-19364, and CVE-2021-20181. We should fuzz this device

This patch adds two virtio-9p configurations:
 * One with the widely used -fsdev local driver. This driver leaks some
   state in the form of files/directories created in the shared dir.
 * One with the synth driver. While it is not used in the real world, this
   driver won't leak leak state between fuzz inputs.

Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Message-Id: <20210117230924.449676-4-alxndr@bu.edu>
---
 tests/qtest/fuzz/generic_fuzz_configs.h | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/tests/qtest/fuzz/generic_fuzz_configs.h b/tests/qtest/fuzz/generic_fuzz_configs.h
index 51e69c6e42..5d599765c4 100644
--- a/tests/qtest/fuzz/generic_fuzz_configs.h
+++ b/tests/qtest/fuzz/generic_fuzz_configs.h
@@ -19,6 +19,16 @@ typedef struct generic_fuzz_config {
     gchar* (*argfunc)(void); /* Result must be freeable by g_free() */
 } generic_fuzz_config;
 
+static inline gchar *generic_fuzzer_virtio_9p_args(void){
+    char tmpdir[] = "/tmp/qemu-fuzz.XXXXXX";
+    g_assert_nonnull(mkdtemp(tmpdir));
+
+    return g_strdup_printf("-machine q35 -nodefaults "
+    "-device virtio-9p,fsdev=hshare,mount_tag=hshare "
+    "-fsdev local,id=hshare,path=%s,security_model=mapped-xattr,"
+    "writeout=immediate,fmode=0600,dmode=0700", tmpdir);
+}
+
 const generic_fuzz_config predefined_configs[] = {
     {
         .name = "virtio-net-pci-slirp",
@@ -60,6 +70,16 @@ const generic_fuzz_config predefined_configs[] = {
         .name = "virtio-mouse",
         .args = "-machine q35 -nodefaults -device virtio-mouse",
         .objects = "virtio*",
+    },{
+        .name = "virtio-9p",
+        .argfunc = generic_fuzzer_virtio_9p_args,
+        .objects = "virtio*",
+    },{
+        .name = "virtio-9p-synth",
+        .args = "-machine q35 -nodefaults "
+        "-device virtio-9p,fsdev=hshare,mount_tag=hshare "
+        "-fsdev synth,id=hshare",
+        .objects = "virtio*",
     },{
         .name = "e1000",
         .args = "-M q35 -nodefaults "
-- 
2.29.2

[PULL 08/46] target/i386: do not set LM for 32-bit emulation "-cpu host/max"

[Paolo Bonzini]

32-bit targets by definition do not support long mode; therefore, the
bit must be masked in the features supported by the accelerator.

As a side effect, this avoids setting up the 0x80000008 CPUID leaf
for

   qemu-system-i386 -cpu host

which since commit 5a140b255d ("x86/cpu: Use max host physical address
if -cpu max option is applied") would have printed this error:

  qemu-system-i386: phys-bits should be between 32 and 36  (but is 48)

Reported-by: Nathan Chancellor <natechancellor@gmail.com>
Tested-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/cpu.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index ae89024d36..e775e9abb5 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -5073,6 +5073,11 @@ static uint64_t x86_cpu_get_supported_feature_word(FeatureWord w,
     } else {
         return ~0;
     }
+#ifndef TARGET_X86_64
+    if (w == FEAT_8000_0001_EDX) {
+        r &= ~CPUID_EXT2_LM;
+    }
+#endif
     if (migratable_only) {
         r &= x86_cpu_get_migratable_flags(w);
     }
-- 
2.29.2

[PULL 09/46] machine: add missing doc for memory-backend option

[Paolo Bonzini]

From: Igor Mammedov <imammedo@redhat.com>

Add documentation for '-machine memory-backend' CLI option and
how to use it.

And document that x-use-canonical-path-for-ramblock-id,
is considered to be stable to make sure it won't go away by accident.

x- was intended for unstable/iternal properties, and not supposed to
be stable option. However it's too late to rename (drop x-)
it as it would mean that users will have to mantain both
x-use-canonical-path-for-ramblock-id (for QEMU 5.0-5.2) versions
and prefix-less for later versions.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20210121161504.1007247-1-imammedo@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 backends/hostmem.c | 10 ++++++++++
 qemu-options.hx    | 26 +++++++++++++++++++++++++-
 2 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/backends/hostmem.c b/backends/hostmem.c
index be0c3b079f..c6c1ff5b99 100644
--- a/backends/hostmem.c
+++ b/backends/hostmem.c
@@ -494,6 +494,16 @@ host_memory_backend_class_init(ObjectClass *oc, void *data)
         host_memory_backend_get_share, host_memory_backend_set_share);
     object_class_property_set_description(oc, "share",
         "Mark the memory as private to QEMU or shared");
+    /*
+     * Do not delete/rename option. This option must be considered stable
+     * (as if it didn't have the 'x-' prefix including deprecation period) as
+     * long as 4.0 and older machine types exists.
+     * Option will be used by upper layers to override (disable) canonical path
+     * for ramblock-id set by compat properties on old machine types ( <= 4.0),
+     * to keep migration working when backend is used for main RAM with
+     * -machine memory-backend= option (main RAM historically used prefix-less
+     * ramblock-id).
+     */
     object_class_property_add_bool(oc, "x-use-canonical-path-for-ramblock-id",
         host_memory_backend_get_use_canonical_path,
         host_memory_backend_set_use_canonical_path);
diff --git a/qemu-options.hx b/qemu-options.hx
index c09c4646e2..6c34c7050f 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -35,7 +35,8 @@ DEF("machine", HAS_ARG, QEMU_OPTION_machine, \
     "                suppress-vmdesc=on|off disables self-describing migration (default=off)\n"
     "                nvdimm=on|off controls NVDIMM support (default=off)\n"
     "                memory-encryption=@var{} memory encryption object to use (default=none)\n"
-    "                hmat=on|off controls ACPI HMAT support (default=off)\n",
+    "                hmat=on|off controls ACPI HMAT support (default=off)\n"
+    "                memory-backend='backend-id' specifies explicitly provided backend for main RAM (default=none)\n",
     QEMU_ARCH_ALL)
 SRST
 ``-machine [type=]name[,prop=value[,...]]``
@@ -96,6 +97,29 @@ SRST
     ``hmat=on|off``
         Enables or disables ACPI Heterogeneous Memory Attribute Table
         (HMAT) support. The default is off.
+
+     ``memory-backend='id'``
+        An alternative to legacy ``-mem-path`` and ``mem-prealloc`` options.
+        Allows to use a memory backend as main RAM.
+
+        For example:
+        ::
+        -object memory-backend-file,id=pc.ram,size=512M,mem-path=/hugetlbfs,prealloc=on,share=on
+        -machine memory-backend=pc.ram
+        -m 512M
+
+        Migration compatibility note:
+        a) as backend id one shall use value of 'default-ram-id', advertised by
+        machine type (available via ``query-machines`` QMP command), if migration
+        to/from old QEMU (<5.0) is expected.
+        b) for machine types 4.0 and older, user shall
+        use ``x-use-canonical-path-for-ramblock-id=off`` backend option
+        if migration to/from old QEMU (<5.0) is expected.
+        For example:
+        ::
+        -object memory-backend-ram,id=pc.ram,size=512M,x-use-canonical-path-for-ramblock-id=off
+        -machine memory-backend=pc.ram
+        -m 512M
 ERST
 
 HXCOMM Deprecated by -machine
-- 
2.29.2

[PULL 10/46] meson: accept either shared or static libraries if --disable-static

[Paolo Bonzini]

Meson's "static" argument to cc.find_library is a tri-state.  By default
Meson *prefers* a shared library, which basically means using -l to
look for it; instead, "static: false" *requires* a shared library.  Of
course, "static: true" requires a static library, which is all good
for --enable-static builds.

For --disable-static, "static: false" is rarely desirable; it does not
match what the configure script used to do and the test is more complex
(and harder to debug if it fails, which was reported by Peter Lieven
for librbd).

Reported-by: Peter Lieven <pl@kamp.de>
Tested-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 docs/devel/build-system.rst |  2 +-
 meson.build                 | 79 +++++++++++++++++++------------------
 2 files changed, 42 insertions(+), 39 deletions(-)

diff --git a/docs/devel/build-system.rst b/docs/devel/build-system.rst
index 31f4dced2a..69ce3087e3 100644
--- a/docs/devel/build-system.rst
+++ b/docs/devel/build-system.rst
@@ -100,7 +100,7 @@ In meson.build::
   # Detect dependency
   sdl_image = dependency('SDL2_image', required: get_option('sdl_image'),
                          method: 'pkg-config',
-                         static: enable_static)
+                         kwargs: static_kwargs)
 
   # Create config-host.h (if applicable)
   config_host_data.set('CONFIG_SDL_IMAGE', sdl_image.found())
diff --git a/meson.build b/meson.build
index 2d8b433ff0..6d6537d74a 100644
--- a/meson.build
+++ b/meson.build
@@ -18,6 +18,9 @@ config_host = keyval.load(meson.current_build_dir() / 'config-host.mak')
 enable_modules = 'CONFIG_MODULES' in config_host
 enable_static = 'CONFIG_STATIC' in config_host
 
+# Allow both shared and static libraries unless --enable-static
+static_kwargs = enable_static ? {'static': true} : {}
+
 # Temporary directory used for files created while
 # configure runs. Since it is in the build directory
 # we can safely blow away any previous version of it
@@ -311,14 +314,14 @@ endif
 pixman = not_found
 if have_system or have_tools
   pixman = dependency('pixman-1', required: have_system, version:'>=0.21.8',
-                      method: 'pkg-config', static: enable_static)
+                      method: 'pkg-config', kwargs: static_kwargs)
 endif
 pam = not_found
 if 'CONFIG_AUTH_PAM' in config_host
   pam = cc.find_library('pam')
 endif
 libaio = cc.find_library('aio', required: false)
-zlib = dependency('zlib', required: true, static: enable_static)
+zlib = dependency('zlib', required: true, kwargs: static_kwargs)
 linux_io_uring = not_found
 if 'CONFIG_LINUX_IO_URING' in config_host
   linux_io_uring = declare_dependency(compile_args: config_host['LINUX_IO_URING_CFLAGS'].split(),
@@ -333,7 +336,7 @@ libnfs = not_found
 if not get_option('libnfs').auto() or have_block
   libnfs = dependency('libnfs', version: '>=1.9.3',
                       required: get_option('libnfs'),
-                      method: 'pkg-config', static: enable_static)
+                      method: 'pkg-config', kwargs: static_kwargs)
 endif
 
 libattr_test = '''
@@ -354,7 +357,7 @@ if not get_option('attr').disabled()
   else
     libattr = cc.find_library('attr', has_headers: ['attr/xattr.h'],
                               required: get_option('attr'),
-                              static: enable_static)
+                              kwargs: static_kwargs)
     if libattr.found() and not \
       cc.links(libattr_test, dependencies: libattr, args: '-DCONFIG_LIBATTR')
       libattr = not_found
@@ -381,14 +384,14 @@ seccomp = not_found
 if not get_option('seccomp').auto() or have_system or have_tools
   seccomp = dependency('libseccomp', version: '>=2.3.0',
                        required: get_option('seccomp'),
-                       method: 'pkg-config', static: enable_static)
+                       method: 'pkg-config', kwargs: static_kwargs)
 endif
 
 libcap_ng = not_found
 if not get_option('cap_ng').auto() or have_system or have_tools
   libcap_ng = cc.find_library('cap-ng', has_headers: ['cap-ng.h'],
                               required: get_option('cap_ng'),
-                              static: enable_static)
+                              kwargs: static_kwargs)
 endif
 if libcap_ng.found() and not cc.links('''
    #include <cap-ng.h>
@@ -409,7 +412,7 @@ if get_option('xkbcommon').auto() and not have_system and not have_tools
   xkbcommon = not_found
 else
   xkbcommon = dependency('xkbcommon', required: get_option('xkbcommon'),
-                         method: 'pkg-config', static: enable_static)
+                         method: 'pkg-config', kwargs: static_kwargs)
 endif
 vde = not_found
 if config_host.has_key('CONFIG_VDE')
@@ -445,13 +448,13 @@ libiscsi = not_found
 if not get_option('libiscsi').auto() or have_block
   libiscsi = dependency('libiscsi', version: '>=1.9.0',
                          required: get_option('libiscsi'),
-                         method: 'pkg-config', static: enable_static)
+                         method: 'pkg-config', kwargs: static_kwargs)
 endif
 zstd = not_found
 if not get_option('zstd').auto() or have_block
   zstd = dependency('libzstd', version: '>=1.4.0',
                     required: get_option('zstd'),
-                    method: 'pkg-config', static: enable_static)
+                    method: 'pkg-config', kwargs: static_kwargs)
 endif
 gbm = not_found
 if 'CONFIG_GBM' in config_host
@@ -468,14 +471,14 @@ if not get_option('curl').auto() or have_block
   curl = dependency('libcurl', version: '>=7.29.0',
                     method: 'pkg-config',
                     required: get_option('curl'),
-                    static: enable_static)
+                    kwargs: static_kwargs)
 endif
 libudev = not_found
 if targetos == 'linux' and (have_system or have_tools)
   libudev = dependency('libudev',
                        method: 'pkg-config',
                        required: get_option('libudev'),
-                       static: enable_static)
+                       kwargs: static_kwargs)
 endif
 
 mpathlibs = [libudev]
@@ -511,17 +514,17 @@ if targetos == 'linux' and have_tools and not get_option('mpath').disabled()
       }'''
   libmpathpersist = cc.find_library('mpathpersist',
                                     required: get_option('mpath'),
-                                    static: enable_static)
+                                    kwargs: static_kwargs)
   if libmpathpersist.found()
     mpathlibs += libmpathpersist
     if enable_static
       mpathlibs += cc.find_library('devmapper',
                                      required: get_option('mpath'),
-                                     static: enable_static)
+                                     kwargs: static_kwargs)
     endif
     mpathlibs += cc.find_library('multipath',
                                  required: get_option('mpath'),
-                                 static: enable_static)
+                                 kwargs: static_kwargs)
     foreach lib: mpathlibs
       if not lib.found()
         mpathlibs = []
@@ -571,7 +574,7 @@ if have_system and not get_option('curses').disabled()
       curses = dependency(curses_dep,
                           required: false,
                           method: 'pkg-config',
-                          static: enable_static)
+                          kwargs: static_kwargs)
     endif
   endforeach
   msg = get_option('curses').enabled() ? 'curses library not found' : ''
@@ -596,7 +599,7 @@ if have_system and not get_option('curses').disabled()
       foreach curses_libname : curses_libname_list
         libcurses = cc.find_library(curses_libname,
                                     required: false,
-                                    static: enable_static)
+                                    kwargs: static_kwargs)
         if libcurses.found()
           if cc.links(curses_test, args: curses_compile_args, dependencies: libcurses)
             curses = declare_dependency(compile_args: curses_compile_args,
@@ -647,7 +650,7 @@ brlapi = not_found
 if not get_option('brlapi').auto() or have_system
   brlapi = cc.find_library('brlapi', has_headers: ['brlapi.h'],
                          required: get_option('brlapi'),
-                         static: enable_static)
+                         kwargs: static_kwargs)
   if brlapi.found() and not cc.links('''
      #include <brlapi.h>
      #include <stddef.h>
@@ -663,7 +666,7 @@ endif
 
 sdl = not_found
 if not get_option('sdl').auto() or (have_system and not cocoa.found())
-  sdl = dependency('sdl2', required: get_option('sdl'), static: enable_static)
+  sdl = dependency('sdl2', required: get_option('sdl'), kwargs: static_kwargs)
   sdl_image = not_found
 endif
 if sdl.found()
@@ -671,7 +674,7 @@ if sdl.found()
   sdl = declare_dependency(compile_args: '-Wno-undef',
                            dependencies: sdl)
   sdl_image = dependency('SDL2_image', required: get_option('sdl_image'),
-                         method: 'pkg-config', static: enable_static)
+                         method: 'pkg-config', kwargs: static_kwargs)
 else
   if get_option('sdl_image').enabled()
     error('sdl-image required, but SDL was @0@'.format(
@@ -683,10 +686,10 @@ endif
 rbd = not_found
 if not get_option('rbd').auto() or have_block
   librados = cc.find_library('rados', required: get_option('rbd'),
-                             static: enable_static)
+                             kwargs: static_kwargs)
   librbd = cc.find_library('rbd', has_headers: ['rbd/librbd.h'],
                            required: get_option('rbd'),
-                           static: enable_static)
+                           kwargs: static_kwargs)
   if librados.found() and librbd.found() and cc.links('''
     #include <stdio.h>
     #include <rbd/librbd.h>
@@ -705,7 +708,7 @@ glusterfs_iocb_has_stat = false
 if not get_option('glusterfs').auto() or have_block
   glusterfs = dependency('glusterfs-api', version: '>=3',
                          required: get_option('glusterfs'),
-                         method: 'pkg-config', static: enable_static)
+                         method: 'pkg-config', kwargs: static_kwargs)
   if glusterfs.found()
     glusterfs_ftruncate_has_stat = cc.links('''
       #include <glusterfs/api/glfs.h>
@@ -744,7 +747,7 @@ libbzip2 = not_found
 if not get_option('bzip2').auto() or have_block
   libbzip2 = cc.find_library('bz2', has_headers: ['bzlib.h'],
                              required: get_option('bzip2'),
-                             static: enable_static)
+                             kwargs: static_kwargs)
   if libbzip2.found() and not cc.links('''
      #include <bzlib.h>
      int main(void) { BZ2_bzlibVersion(); return 0; }''', dependencies: libbzip2)
@@ -761,7 +764,7 @@ liblzfse = not_found
 if not get_option('lzfse').auto() or have_block
   liblzfse = cc.find_library('lzfse', has_headers: ['lzfse.h'],
                              required: get_option('lzfse'),
-                             static: enable_static)
+                             kwargs: static_kwargs)
 endif
 if liblzfse.found() and not cc.links('''
    #include <lzfse.h>
@@ -798,12 +801,12 @@ if not get_option('gtk').auto() or (have_system and not cocoa.found())
   gtk = dependency('gtk+-3.0', version: '>=3.22.0',
                    method: 'pkg-config',
                    required: get_option('gtk'),
-                   static: enable_static)
+                   kwargs: static_kwargs)
   if gtk.found()
     gtkx11 = dependency('gtk+-x11-3.0', version: '>=3.22.0',
                         method: 'pkg-config',
                         required: false,
-                        static: enable_static)
+                        kwargs: static_kwargs)
     gtk = declare_dependency(dependencies: [gtk, gtkx11])
   endif
 endif
@@ -816,7 +819,7 @@ endif
 x11 = not_found
 if gtkx11.found() or 'lm32-softmmu' in target_dirs
   x11 = dependency('x11', method: 'pkg-config', required: gtkx11.found(),
-                   static: enable_static)
+                   kwargs: static_kwargs)
 endif
 vnc = not_found
 png = not_found
@@ -825,12 +828,12 @@ sasl = not_found
 if get_option('vnc').enabled()
   vnc = declare_dependency() # dummy dependency
   png = dependency('libpng', required: get_option('vnc_png'),
-                   method: 'pkg-config', static: enable_static)
+                   method: 'pkg-config', kwargs: static_kwargs)
   jpeg = dependency('libjpeg', required: get_option('vnc_jpeg'),
-                    method: 'pkg-config', static: enable_static)
+                    method: 'pkg-config', kwargs: static_kwargs)
   sasl = cc.find_library('sasl2', has_headers: ['sasl/sasl.h'],
                          required: get_option('vnc_sasl'),
-                         static: enable_static)
+                         kwargs: static_kwargs)
   if sasl.found()
     sasl = declare_dependency(dependencies: sasl,
                               compile_args: '-DSTRUCT_IOVEC_DEFINED')
@@ -841,7 +844,7 @@ snappy = not_found
 if not get_option('snappy').auto() or have_system
   snappy = cc.find_library('snappy', has_headers: ['snappy-c.h'],
                            required: get_option('snappy'),
-                           static: enable_static)
+                           kwargs: static_kwargs)
 endif
 if snappy.found() and not cc.links('''
    #include <snappy-c.h>
@@ -858,7 +861,7 @@ lzo = not_found
 if not get_option('lzo').auto() or have_system
   lzo = cc.find_library('lzo2', has_headers: ['lzo/lzo1x.h'],
                         required: get_option('lzo'),
-                        static: enable_static)
+                        kwargs: static_kwargs)
 endif
 if lzo.found() and not cc.links('''
    #include <lzo/lzo1x.h>
@@ -893,7 +896,7 @@ u2f = not_found
 if have_system
   u2f = dependency('u2f-emu', required: get_option('u2f'),
                    method: 'pkg-config',
-                   static: enable_static)
+                   kwargs: static_kwargs)
 endif
 usbredir = not_found
 if 'CONFIG_USB_REDIR' in config_host
@@ -920,7 +923,7 @@ if 'CONFIG_TASN1' in config_host
                              link_args: config_host['TASN1_LIBS'].split())
 endif
 keyutils = dependency('libkeyutils', required: false,
-                      method: 'pkg-config', static: enable_static)
+                      method: 'pkg-config', kwargs: static_kwargs)
 
 has_gettid = cc.has_function('gettid')
 
@@ -979,7 +982,7 @@ endif
 
 fuse = dependency('fuse3', required: get_option('fuse'),
                   version: '>=3.1', method: 'pkg-config',
-                  static: enable_static)
+                  kwargs: static_kwargs)
 
 fuse_lseek = not_found
 if not get_option('fuse_lseek').disabled()
@@ -1367,7 +1370,7 @@ capstone_opt = get_option('capstone')
 if capstone_opt in ['enabled', 'auto', 'system']
   have_internal = fs.exists(meson.current_source_dir() / 'capstone/Makefile')
   capstone = dependency('capstone', version: '>=4.0',
-                        static: enable_static, method: 'pkg-config',
+                        kwargs: static_kwargs, method: 'pkg-config',
                         required: capstone_opt == 'system' or
                                   capstone_opt == 'enabled' and not have_internal)
   if capstone.found()
@@ -1477,7 +1480,7 @@ if have_system
   slirp_opt = get_option('slirp')
   if slirp_opt in ['enabled', 'auto', 'system']
     have_internal = fs.exists(meson.current_source_dir() / 'slirp/meson.build')
-    slirp = dependency('slirp', static: enable_static,
+    slirp = dependency('slirp', kwargs: static_kwargs,
                        method: 'pkg-config',
                        required: slirp_opt == 'system' or
                                  slirp_opt == 'enabled' and not have_internal)
@@ -1556,7 +1559,7 @@ fdt_opt = get_option('fdt')
 if have_system
   if fdt_opt in ['enabled', 'auto', 'system']
     have_internal = fs.exists(meson.current_source_dir() / 'dtc/libfdt/Makefile.libfdt')
-    fdt = cc.find_library('fdt', static: enable_static,
+    fdt = cc.find_library('fdt', kwargs: static_kwargs,
                           required: fdt_opt == 'system' or
                                     fdt_opt == 'enabled' and not have_internal)
     if fdt.found() and cc.links('''
-- 
2.29.2

[PULL 11/46] meson: honor --enable-rbd if cc.links test fails

[Paolo Bonzini]

If the link test failed, compilation proceeded with RBD disabled,
even if --enable-rbd was used on the configure command line.
Fix that.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 meson.build | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

diff --git a/meson.build b/meson.build
index 6d6537d74a..5bd22f431a 100644
--- a/meson.build
+++ b/meson.build
@@ -690,15 +690,21 @@ if not get_option('rbd').auto() or have_block
   librbd = cc.find_library('rbd', has_headers: ['rbd/librbd.h'],
                            required: get_option('rbd'),
                            kwargs: static_kwargs)
-  if librados.found() and librbd.found() and cc.links('''
-    #include <stdio.h>
-    #include <rbd/librbd.h>
-    int main(void) {
-      rados_t cluster;
-      rados_create(&cluster, NULL);
-      return 0;
-    }''', dependencies: [librbd, librados])
-    rbd = declare_dependency(dependencies: [librbd, librados])
+  if librados.found() and librbd.found()
+    if cc.links('''
+      #include <stdio.h>
+      #include <rbd/librbd.h>
+      int main(void) {
+        rados_t cluster;
+        rados_create(&cluster, NULL);
+        return 0;
+      }''', dependencies: [librbd, librados])
+      rbd = declare_dependency(dependencies: [librbd, librados])
+    elif get_option('rbd').enabled()
+      error('could not link librados')
+    else
+      warning('could not link librados, disabling')
+    endif
   endif
 endif
 
-- 
2.29.2

[PULL 12/46] x86/cpu: Populate SVM CPUID feature bits

[Paolo Bonzini]

From: Wei Huang <wei.huang2@amd.com>

Newer AMD CPUs will add CPUID_0x8000000A_EDX[28] bit, which indicates
that SVM instructions (VMRUN/VMSAVE/VMLOAD) will trigger #VMEXIT before
CPU checking their EAX against reserved memory regions. This change will
allow the hypervisor to avoid intercepting #GP and emulating SVM
instructions. KVM turns on this CPUID bit for nested VMs. In order to
support it, let us populate this bit, along with other SVM feature bits,
in FEAT_SVM.

Signed-off-by: Wei Huang <wei.huang2@amd.com>
Message-Id: <20210126202456.589932-1-wei.huang2@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/cpu.c |  6 +++---
 target/i386/cpu.h | 24 ++++++++++++++----------
 2 files changed, 17 insertions(+), 13 deletions(-)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index e775e9abb5..ff25ad6f6c 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -926,11 +926,11 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
             "npt", "lbrv", "svm-lock", "nrip-save",
             "tsc-scale", "vmcb-clean",  "flushbyasid", "decodeassists",
             NULL, NULL, "pause-filter", NULL,
-            "pfthreshold", NULL, NULL, NULL,
-            NULL, NULL, NULL, NULL,
-            NULL, NULL, NULL, NULL,
+            "pfthreshold", "avic", NULL, "v-vmsave-vmload",
+            "vgif", NULL, NULL, NULL,
             NULL, NULL, NULL, NULL,
             NULL, NULL, NULL, NULL,
+            "svme-addr-chk", NULL, NULL, NULL,
         },
         .cpuid = { .eax = 0x8000000A, .reg = R_EDX, },
         .tcg_features = TCG_SVM_FEATURES,
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index d23a5b340a..b39ec505de 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -670,16 +670,20 @@ typedef uint64_t FeatureWordArray[FEATURE_WORDS];
 #define CPUID_EXT3_PERFCORE (1U << 23)
 #define CPUID_EXT3_PERFNB  (1U << 24)
 
-#define CPUID_SVM_NPT          (1U << 0)
-#define CPUID_SVM_LBRV         (1U << 1)
-#define CPUID_SVM_SVMLOCK      (1U << 2)
-#define CPUID_SVM_NRIPSAVE     (1U << 3)
-#define CPUID_SVM_TSCSCALE     (1U << 4)
-#define CPUID_SVM_VMCBCLEAN    (1U << 5)
-#define CPUID_SVM_FLUSHASID    (1U << 6)
-#define CPUID_SVM_DECODEASSIST (1U << 7)
-#define CPUID_SVM_PAUSEFILTER  (1U << 10)
-#define CPUID_SVM_PFTHRESHOLD  (1U << 12)
+#define CPUID_SVM_NPT             (1U << 0)
+#define CPUID_SVM_LBRV            (1U << 1)
+#define CPUID_SVM_SVMLOCK         (1U << 2)
+#define CPUID_SVM_NRIPSAVE        (1U << 3)
+#define CPUID_SVM_TSCSCALE        (1U << 4)
+#define CPUID_SVM_VMCBCLEAN       (1U << 5)
+#define CPUID_SVM_FLUSHASID       (1U << 6)
+#define CPUID_SVM_DECODEASSIST    (1U << 7)
+#define CPUID_SVM_PAUSEFILTER     (1U << 10)
+#define CPUID_SVM_PFTHRESHOLD     (1U << 12)
+#define CPUID_SVM_AVIC            (1U << 13)
+#define CPUID_SVM_V_VMSAVE_VMLOAD (1U << 15)
+#define CPUID_SVM_VGIF            (1U << 16)
+#define CPUID_SVM_SVME_ADDR_CHK   (1U << 28)
 
 /* Support RDFSBASE/RDGSBASE/WRFSBASE/WRGSBASE */
 #define CPUID_7_0_EBX_FSGSBASE          (1U << 0)
-- 
2.29.2

[PULL 13/46] fuzz: fix wrong index in clear_bits

[Paolo Bonzini]

From: Qiuhao Li <Qiuhao.Li@outlook.com>

Signed-off-by: Qiuhao Li <Qiuhao.Li@outlook.com>
Message-Id: <SYCPR01MB3502E9F6EB06DEDCD484F738FCBA9@SYCPR01MB3502.ausprd01.prod.outlook.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 scripts/oss-fuzz/minimize_qtest_trace.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/oss-fuzz/minimize_qtest_trace.py b/scripts/oss-fuzz/minimize_qtest_trace.py
index 4cba96dee2..20825768c2 100755
--- a/scripts/oss-fuzz/minimize_qtest_trace.py
+++ b/scripts/oss-fuzz/minimize_qtest_trace.py
@@ -261,7 +261,7 @@ def clear_bits(newtrace, outpath):
                 data_try = hex(int("".join(data_bin_list), 2))
                 # It seems qtest only accepts padded hex-values.
                 if len(data_try) % 2 == 1:
-                    data_try = data_try[:2] + "0" + data_try[2:-1]
+                    data_try = data_try[:2] + "0" + data_try[2:]
 
                 newtrace[i] = "{prefix} {data_try}\n".format(
                         prefix=prefix,
-- 
2.29.2

[PULL 14/46] docs: don't install corresponding man page if guest agent is disabled

[Paolo Bonzini]

From: Stefan Reiter <s.reiter@proxmox.com>

No sense outputting the qemu-ga and qemu-ga-ref man pages when the guest
agent binary itself is disabled. This mirrors behaviour from before the
meson switch.

Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
Message-Id: <20210128145801.14384-1-s.reiter@proxmox.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 docs/meson.build | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/docs/meson.build b/docs/meson.build
index bb14eaebd3..f84306ba7e 100644
--- a/docs/meson.build
+++ b/docs/meson.build
@@ -46,9 +46,11 @@ if build_docs
                           meson.source_root() / 'docs/sphinx/qmp_lexer.py',
                           qapi_gen_depends ]
 
+  have_ga = have_tools and config_host.has_key('CONFIG_GUEST_AGENT')
+
   man_pages = {
-        'qemu-ga.8': (have_tools ? 'man8' : ''),
-        'qemu-ga-ref.7': 'man7',
+        'qemu-ga.8': (have_ga ? 'man8' : ''),
+        'qemu-ga-ref.7': (have_ga ? 'man7' : ''),
         'qemu-qmp-ref.7': 'man7',
         'qemu-storage-daemon-qmp-ref.7': (have_tools ? 'man7' : ''),
         'qemu-img.1': (have_tools ? 'man1' : ''),
-- 
2.29.2

[PULL 15/46] virtio-scsi: don't uninitialize queues that we didn't initialize

[Paolo Bonzini]

From: Maxim Levitsky <mlevitsk@redhat.com>

Count number of queues that we initialized and only deinitialize these that we
initialized successfully.

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20201217150040.906961-3-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/scsi/virtio-scsi-dataplane.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/hw/scsi/virtio-scsi-dataplane.c b/hw/scsi/virtio-scsi-dataplane.c
index b995bab3a2..2c83a0ab1f 100644
--- a/hw/scsi/virtio-scsi-dataplane.c
+++ b/hw/scsi/virtio-scsi-dataplane.c
@@ -126,6 +126,7 @@ int virtio_scsi_dataplane_start(VirtIODevice *vdev)
 {
     int i;
     int rc;
+    int vq_init_count = 0;
     BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
     VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
     VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
@@ -153,17 +154,22 @@ int virtio_scsi_dataplane_start(VirtIODevice *vdev)
     if (rc) {
         goto fail_vrings;
     }
+
+    vq_init_count++;
     rc = virtio_scsi_vring_init(s, vs->event_vq, 1,
                                 virtio_scsi_data_plane_handle_event);
     if (rc) {
         goto fail_vrings;
     }
+
+    vq_init_count++;
     for (i = 0; i < vs->conf.num_queues; i++) {
         rc = virtio_scsi_vring_init(s, vs->cmd_vqs[i], i + 2,
                                     virtio_scsi_data_plane_handle_cmd);
         if (rc) {
             goto fail_vrings;
         }
+        vq_init_count++;
     }
 
     s->dataplane_starting = false;
@@ -174,7 +180,7 @@ int virtio_scsi_dataplane_start(VirtIODevice *vdev)
 fail_vrings:
     aio_wait_bh_oneshot(s->ctx, virtio_scsi_dataplane_stop_bh, s);
     aio_context_release(s->ctx);
-    for (i = 0; i < vs->conf.num_queues + 2; i++) {
+    for (i = 0; i < vq_init_count; i++) {
         virtio_bus_set_host_notifier(VIRTIO_BUS(qbus), i, false);
         virtio_bus_cleanup_host_notifier(VIRTIO_BUS(qbus), i);
     }
-- 
2.29.2

[PULL 16/46] event_notifier: handle initialization failure better

[Paolo Bonzini]

From: Maxim Levitsky <mlevitsk@redhat.com>

Add 'initialized' field and use it to avoid touching event notifiers which are
either not initialized or if their initialization failed.

This is somewhat a hack, but it seems the less intrusive way to make
virtio code deal with event notifiers that failed initialization.

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20201217150040.906961-4-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 include/qemu/event_notifier.h |  1 +
 util/event_notifier-posix.c   | 16 ++++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/include/qemu/event_notifier.h b/include/qemu/event_notifier.h
index 3380b662f3..b79add035d 100644
--- a/include/qemu/event_notifier.h
+++ b/include/qemu/event_notifier.h
@@ -24,6 +24,7 @@ struct EventNotifier {
 #else
     int rfd;
     int wfd;
+    bool initialized;
 #endif
 };
 
diff --git a/util/event_notifier-posix.c b/util/event_notifier-posix.c
index 00d93204f9..5b2110e861 100644
--- a/util/event_notifier-posix.c
+++ b/util/event_notifier-posix.c
@@ -29,6 +29,7 @@ void event_notifier_init_fd(EventNotifier *e, int fd)
 {
     e->rfd = fd;
     e->wfd = fd;
+    e->initialized = true;
 }
 #endif
 
@@ -68,6 +69,7 @@ int event_notifier_init(EventNotifier *e, int active)
     if (active) {
         event_notifier_set(e);
     }
+    e->initialized = true;
     return 0;
 
 fail:
@@ -78,12 +80,18 @@ fail:
 
 void event_notifier_cleanup(EventNotifier *e)
 {
+    if (!e->initialized) {
+        return;
+    }
+
     if (e->rfd != e->wfd) {
         close(e->rfd);
     }
+
     e->rfd = -1;
     close(e->wfd);
     e->wfd = -1;
+    e->initialized = false;
 }
 
 int event_notifier_get_fd(const EventNotifier *e)
@@ -96,6 +104,10 @@ int event_notifier_set(EventNotifier *e)
     static const uint64_t value = 1;
     ssize_t ret;
 
+    if (!e->initialized) {
+        return -1;
+    }
+
     do {
         ret = write(e->wfd, &value, sizeof(value));
     } while (ret < 0 && errno == EINTR);
@@ -113,6 +125,10 @@ int event_notifier_test_and_clear(EventNotifier *e)
     ssize_t len;
     char buffer[512];
 
+    if (!e->initialized) {
+        return 0;
+    }
+
     /* Drain the notify pipe.  For eventfd, only 8 bytes will be read.  */
     value = 0;
     do {
-- 
2.29.2

[PULL 17/46] target/i386: Fix decoding of certain BMI instructions

[Paolo Bonzini]

From: David Greenaway <dgreenaway@google.com>

This patch fixes a translation bug for a subset of x86 BMI instructions
such as the following:

   c4 e2 f9 f7 c0                shlxq   %rax, %rax, %rax

Currently, these incorrectly generate an undefined instruction exception
when SSE is disabled via CR4, while instructions like "shrxq" work fine.

The problem appears to be related to BMI instructions encoded using VEX
and with a mandatory prefix of "0x66" (data). Instructions with this
data prefix (such as shlxq) are currently rejected. Instructions with
other mandatory prefixes (such as shrxq) translate as expected.

This patch removes the incorrect check in "gen_sse" that causes the
exception to be generated. For the non-BMI cases, the check is
redundant: prefixes are already checked at line 3696.

Buglink: https://bugs.launchpad.net/qemu/+bug/1748296

Signed-off-by: David Greenaway <dgreenaway@google.com>
Message-Id: <20210114063958.1508050-1-dgreenaway@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/tcg/translate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c
index 6a4c31f933..af1faf9342 100644
--- a/target/i386/tcg/translate.c
+++ b/target/i386/tcg/translate.c
@@ -3075,7 +3075,7 @@ static void gen_sse(CPUX86State *env, DisasContext *s, int b,
     }
     if (is_xmm
         && !(s->flags & HF_OSFXSR_MASK)
-        && ((b != 0x38 && b != 0x3a) || (s->prefix & PREFIX_DATA))) {
+        && (b != 0x38 && b != 0x3a)) {
         goto unknown_op;
     }
     if (b == 0x0e) {
-- 
2.29.2

[PULL 18/46] target/i86: implement PKS

[Paolo Bonzini]

Protection Keys for Supervisor-mode pages is a simple extension of
the PKU feature that QEMU already implements.  For supervisor-mode
pages, protection key restrictions come from a new MSR.  The MSR
has no XSAVE state associated to it.

PKS is only respected in long mode.  However, in principle it is
possible to set the MSR even outside long mode, and in fact
even the XSAVE state for PKRU could be set outside long mode
using XRSTOR.  So do not limit the migration subsections for
PKRU and PKRS to long mode.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/cpu.c             |  4 ++--
 target/i386/cpu.h             |  5 +++++
 target/i386/helper.c          |  3 +++
 target/i386/machine.c         | 24 ++++++++++++++++++++----
 target/i386/tcg/excp_helper.c | 32 ++++++++++++++++++++------------
 target/i386/tcg/misc_helper.c | 14 ++++++++++++++
 6 files changed, 64 insertions(+), 18 deletions(-)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index ff25ad6f6c..0b0d65c21c 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -667,7 +667,7 @@ static void x86_cpu_vendor_words2str(char *dst, uint32_t vendor1,
           CPUID_7_0_EBX_RDSEED */
 #define TCG_7_0_ECX_FEATURES (CPUID_7_0_ECX_PKU | \
           /* CPUID_7_0_ECX_OSPKE is dynamic */ \
-          CPUID_7_0_ECX_LA57)
+          CPUID_7_0_ECX_LA57 | CPUID_7_0_ECX_PKS)
 #define TCG_7_0_EDX_FEATURES 0
 #define TCG_7_1_EAX_FEATURES 0
 #define TCG_APM_FEATURES 0
@@ -964,7 +964,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
             "la57", NULL, NULL, NULL,
             NULL, NULL, "rdpid", NULL,
             NULL, "cldemote", NULL, "movdiri",
-            "movdir64b", NULL, NULL, NULL,
+            "movdir64b", NULL, NULL, "pks",
         },
         .cpuid = {
             .eax = 7,
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index b39ec505de..cc5a26f35b 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -247,6 +247,7 @@ typedef enum X86Seg {
 #define CR4_SMEP_MASK   (1U << 20)
 #define CR4_SMAP_MASK   (1U << 21)
 #define CR4_PKE_MASK   (1U << 22)
+#define CR4_PKS_MASK   (1U << 24)
 
 #define DR6_BD          (1 << 13)
 #define DR6_BS          (1 << 14)
@@ -357,6 +358,7 @@ typedef enum X86Seg {
 
 #define MSR_IA32_TSX_CTRL		0x122
 #define MSR_IA32_TSCDEADLINE            0x6e0
+#define MSR_IA32_PKRS                   0x6e1
 
 #define FEATURE_CONTROL_LOCKED                    (1<<0)
 #define FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX (1<<2)
@@ -772,6 +774,8 @@ typedef uint64_t FeatureWordArray[FEATURE_WORDS];
 #define CPUID_7_0_ECX_MOVDIRI           (1U << 27)
 /* Move 64 Bytes as Direct Store Instruction */
 #define CPUID_7_0_ECX_MOVDIR64B         (1U << 28)
+/* Protection Keys for Supervisor-mode Pages */
+#define CPUID_7_0_ECX_PKS               (1U << 31)
 
 /* AVX512 Neural Network Instructions */
 #define CPUID_7_0_EDX_AVX512_4VNNIW     (1U << 2)
@@ -1487,6 +1491,7 @@ typedef struct CPUX86State {
     uint64_t msr_smi_count;
 
     uint32_t pkru;
+    uint32_t pkrs;
     uint32_t tsx_ctrl;
 
     uint64_t spec_ctrl;
diff --git a/target/i386/helper.c b/target/i386/helper.c
index 6bb0c53182..618ad1c409 100644
--- a/target/i386/helper.c
+++ b/target/i386/helper.c
@@ -194,6 +194,9 @@ void cpu_x86_update_cr4(CPUX86State *env, uint32_t new_cr4)
     if (!(env->features[FEAT_7_0_ECX] & CPUID_7_0_ECX_PKU)) {
         new_cr4 &= ~CR4_PKE_MASK;
     }
+    if (!(env->features[FEAT_7_0_ECX] & CPUID_7_0_ECX_PKS)) {
+        new_cr4 &= ~CR4_PKS_MASK;
+    }
 
     env->cr[4] = new_cr4;
     env->hflags = hflags;
diff --git a/target/i386/machine.c b/target/i386/machine.c
index 1614e8c2f8..3768a753af 100644
--- a/target/i386/machine.c
+++ b/target/i386/machine.c
@@ -980,7 +980,6 @@ static const VMStateDescription vmstate_umwait = {
     }
 };
 
-#ifdef TARGET_X86_64
 static bool pkru_needed(void *opaque)
 {
     X86CPU *cpu = opaque;
@@ -999,7 +998,25 @@ static const VMStateDescription vmstate_pkru = {
         VMSTATE_END_OF_LIST()
     }
 };
-#endif
+
+static bool pkrs_needed(void *opaque)
+{
+    X86CPU *cpu = opaque;
+    CPUX86State *env = &cpu->env;
+
+    return env->pkrs != 0;
+}
+
+static const VMStateDescription vmstate_pkrs = {
+    .name = "cpu/pkrs",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .needed = pkrs_needed,
+    .fields = (VMStateField[]){
+        VMSTATE_UINT32(env.pkrs, X86CPU),
+        VMSTATE_END_OF_LIST()
+    }
+};
 
 static bool tsc_khz_needed(void *opaque)
 {
@@ -1480,9 +1497,8 @@ VMStateDescription vmstate_x86_cpu = {
         &vmstate_umwait,
         &vmstate_tsc_khz,
         &vmstate_msr_smi_count,
-#ifdef TARGET_X86_64
         &vmstate_pkru,
-#endif
+        &vmstate_pkrs,
         &vmstate_spec_ctrl,
         &vmstate_mcg_ext_ctl,
         &vmstate_msr_intel_pt,
diff --git a/target/i386/tcg/excp_helper.c b/target/i386/tcg/excp_helper.c
index a0f44431fe..b7d6259e4a 100644
--- a/target/i386/tcg/excp_helper.c
+++ b/target/i386/tcg/excp_helper.c
@@ -361,6 +361,7 @@ static int handle_mmu_fault(CPUState *cs, vaddr addr, int size,
     uint64_t rsvd_mask = PG_HI_RSVD_MASK;
     uint32_t page_offset;
     target_ulong vaddr;
+    uint32_t pkr;
 
     is_user = mmu_idx == MMU_USER_IDX;
 #if defined(DEBUG_MMU)
@@ -588,21 +589,28 @@ do_check_protect_pse36:
          !((env->cr[4] & CR4_SMEP_MASK) && (ptep & PG_USER_MASK)))) {
         prot |= PAGE_EXEC;
     }
-    if ((env->cr[4] & CR4_PKE_MASK) && (env->hflags & HF_LMA_MASK) &&
-        (ptep & PG_USER_MASK) && env->pkru) {
+
+    if (!(env->hflags & HF_LMA_MASK)) {
+        pkr = 0;
+    } else if (ptep & PG_USER_MASK) {
+        pkr = env->cr[4] & CR4_PKE_MASK ? env->pkru : 0;
+    } else {
+        pkr = env->cr[4] & CR4_PKS_MASK ? env->pkrs : 0;
+    }
+    if (pkr) {
         uint32_t pk = (pte & PG_PKRU_MASK) >> PG_PKRU_BIT;
-        uint32_t pkru_ad = (env->pkru >> pk * 2) & 1;
-        uint32_t pkru_wd = (env->pkru >> pk * 2) & 2;
-        uint32_t pkru_prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
-
-        if (pkru_ad) {
-            pkru_prot &= ~(PAGE_READ | PAGE_WRITE);
-        } else if (pkru_wd && (is_user || env->cr[0] & CR0_WP_MASK)) {
-            pkru_prot &= ~PAGE_WRITE;
+        uint32_t pkr_ad = (pkr >> pk * 2) & 1;
+        uint32_t pkr_wd = (pkr >> pk * 2) & 2;
+        uint32_t pkr_prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
+
+        if (pkr_ad) {
+            pkr_prot &= ~(PAGE_READ | PAGE_WRITE);
+        } else if (pkr_wd && (is_user || env->cr[0] & CR0_WP_MASK)) {
+            pkr_prot &= ~PAGE_WRITE;
         }
 
-        prot &= pkru_prot;
-        if ((pkru_prot & (1 << is_write1)) == 0) {
+        prot &= pkr_prot;
+        if ((pkr_prot & (1 << is_write1)) == 0) {
             assert(is_write1 != 2);
             error_code |= PG_ERROR_PK_MASK;
             goto do_fault_protect;
diff --git a/target/i386/tcg/misc_helper.c b/target/i386/tcg/misc_helper.c
index 0bd6c95749..f02e4fd400 100644
--- a/target/i386/tcg/misc_helper.c
+++ b/target/i386/tcg/misc_helper.c
@@ -244,6 +244,7 @@ void helper_rdmsr(CPUX86State *env)
 void helper_wrmsr(CPUX86State *env)
 {
     uint64_t val;
+    CPUState *cs = env_cpu(env);
 
     cpu_svm_check_intercept_param(env, SVM_EXIT_MSR, 1, GETPC());
 
@@ -296,6 +297,13 @@ void helper_wrmsr(CPUX86State *env)
     case MSR_PAT:
         env->pat = val;
         break;
+    case MSR_IA32_PKRS:
+        if (val & 0xFFFFFFFF00000000ull) {
+            goto error;
+        }
+        env->pkrs = val;
+        tlb_flush(cs);
+        break;
     case MSR_VM_HSAVE_PA:
         env->vm_hsave = val;
         break;
@@ -399,6 +407,9 @@ void helper_wrmsr(CPUX86State *env)
         /* XXX: exception? */
         break;
     }
+    return;
+error:
+    raise_exception_err_ra(env, EXCP0D_GPF, 0, GETPC());
 }
 
 void helper_rdmsr(CPUX86State *env)
@@ -430,6 +441,9 @@ void helper_rdmsr(CPUX86State *env)
     case MSR_PAT:
         val = env->pat;
         break;
+    case MSR_IA32_PKRS:
+        val = env->pkrs;
+        break;
     case MSR_VM_HSAVE_PA:
         val = env->vm_hsave;
         break;
-- 
2.29.2

[PULL 19/46] configure: Improve TCI feature description

[Paolo Bonzini]

From: Philippe Mathieu-Daudé <philmd@redhat.com>

Users might want to enable all features, without realizing some
features have negative effect. Mention the TCI feature is slow
and experimental, hoping it will be selected knowingly.

Suggested-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210125144530.2837481-3-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 configure         | 2 +-
 meson_options.txt | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/configure b/configure
index a34f91171d..ca2cf50773 100755
--- a/configure
+++ b/configure
@@ -1764,7 +1764,7 @@ Advanced options (experts only):
   --with-trace-file=NAME   Full PATH,NAME of file to store traces
                            Default:trace-<pid>
   --disable-slirp          disable SLIRP userspace network connectivity
-  --enable-tcg-interpreter enable TCG with bytecode interpreter (TCI)
+  --enable-tcg-interpreter enable TCI (TCG with bytecode interpreter, experimental and slow)
   --enable-malloc-trim     enable libc malloc_trim() for memory optimization
   --oss-lib                path to OSS library
   --cpu=CPU                Build for host CPU [$cpu]
diff --git a/meson_options.txt b/meson_options.txt
index 95f1079829..675a9c500a 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -40,7 +40,7 @@ option('xen_pci_passthrough', type: 'feature', value: 'auto',
 option('tcg', type: 'feature', value: 'auto',
        description: 'TCG support')
 option('tcg_interpreter', type: 'boolean', value: false,
-       description: 'TCG bytecode interpreter (TCI)')
+       description: 'TCG with bytecode interpreter (experimental and slow)')
 option('cfi', type: 'boolean', value: 'false',
        description: 'Control-Flow Integrity (CFI)')
 option('cfi_debug', type: 'boolean', value: 'false',
-- 
2.29.2

[PULL 20/46] meson: Explicit TCG backend used

[Paolo Bonzini]

From: Philippe Mathieu-Daudé <philmd@redhat.com>

Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210125144530.2837481-4-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 meson.build | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/meson.build b/meson.build
index 5bd22f431a..3a13ba3307 100644
--- a/meson.build
+++ b/meson.build
@@ -227,7 +227,7 @@ tcg_arch = config_host['ARCH']
 if not get_option('tcg').disabled()
   if cpu not in supported_cpus
     if get_option('tcg_interpreter')
-      warning('Unsupported CPU @0@, will use TCG with TCI (experimental)'.format(cpu))
+      warning('Unsupported CPU @0@, will use TCG with TCI (experimental and slow)'.format(cpu))
     else
       error('Unsupported CPU @0@, try --enable-tcg-interpreter'.format(cpu))
     endif
@@ -2509,8 +2509,12 @@ if have_system
 endif
 summary_info += {'TCG support':       config_all.has_key('CONFIG_TCG')}
 if config_all.has_key('CONFIG_TCG')
+  if get_option('tcg_interpreter')
+    summary_info += {'TCG backend':   'TCI (TCG with bytecode interpreter, experimental and slow)'}
+  else
+    summary_info += {'TCG backend':   'native (@0@)'.format(cpu)}
+  endif
   summary_info += {'TCG debug enabled': config_host.has_key('CONFIG_DEBUG_TCG')}
-  summary_info += {'TCG interpreter':   tcg_arch == 'tci'}
 endif
 summary_info += {'target list':       ' '.join(target_dirs)}
 if have_system
-- 
2.29.2

[PULL 21/46] meson: Warn when TCI is selected but TCG backend is available

[Paolo Bonzini]

From: Philippe Mathieu-Daudé <philmd@redhat.com>

Some new users get confused with 'TCG' and 'TCI', and enable TCI
support expecting to enable TCG.

Emit a warning when native TCG backend is available on the
host architecture, mentioning this is a suboptimal configuration.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Suggested-by: Daniel Berrangé <berrange@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210125144530.2837481-5-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 meson.build | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/meson.build b/meson.build
index 3a13ba3307..4cc3ebb827 100644
--- a/meson.build
+++ b/meson.build
@@ -231,6 +231,13 @@ if not get_option('tcg').disabled()
     else
       error('Unsupported CPU @0@, try --enable-tcg-interpreter'.format(cpu))
     endif
+  elif get_option('tcg_interpreter')
+    warning('Use of the TCG interpretor is not recommended on this host')
+    warning('architecture. There is a native TCG execution backend available')
+    warning('which provides substantially better performance and reliability.')
+    warning('It is strongly recommended to remove the --enable-tcg-interpreter')
+    warning('configuration option on this architecture to use the native')
+    warning('backend.')
   endif
   if get_option('tcg_interpreter')
     tcg_arch = 'tci'
-- 
2.29.2

[PULL 22/46] tests/meson: Only build softfloat objects if TCG is selected

[Paolo Bonzini]

From: Philippe Mathieu-Daudé <philmd@redhat.com>

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210122204441.2145197-3-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 tests/meson.build | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tests/meson.build b/tests/meson.build
index 29ebaba48d..6f1ff926d2 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -276,7 +276,9 @@ test('decodetree', sh,
      workdir: meson.current_source_dir() / 'decode',
      suite: 'decodetree')
 
-subdir('fp')
+if 'CONFIG_TCG' in config_all
+  subdir('fp')
+endif
 
 if not get_option('tcg').disabled()
   if 'CONFIG_PLUGIN' in config_host
-- 
2.29.2

[PULL 23/46] pc-bios/meson: Only install EDK2 blob firmwares with system emulation

[Paolo Bonzini]

From: Philippe Mathieu-Daudé <philmd@redhat.com>

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210122204441.2145197-4-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 pc-bios/meson.build | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pc-bios/meson.build b/pc-bios/meson.build
index af95c5d1f1..f2b32598af 100644
--- a/pc-bios/meson.build
+++ b/pc-bios/meson.build
@@ -12,6 +12,7 @@ if install_edk2_blobs
 
   foreach f : fds
     custom_target(f,
+                  build_by_default: have_system,
                   output: f,
                   input: '@0@.bz2'.format(f),
                   capture: true,
-- 
2.29.2

[PULL 24/46] meson: Restrict block subsystem processing

[Paolo Bonzini]

From: Philippe Mathieu-Daudé <philmd@redhat.com>

Avoid generating module_block.h and block-gen.c if we are
not going to use them.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210122204441.2145197-6-philmd@redhat.com>
[Extend to nearby files and directories. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 meson.build | 48 +++++++++++++++++++++++++-----------------------
 1 file changed, 25 insertions(+), 23 deletions(-)

diff --git a/meson.build b/meson.build
index 4cc3ebb827..0ca73d0102 100644
--- a/meson.build
+++ b/meson.build
@@ -1877,29 +1877,31 @@ subdir('libdecnumber')
 subdir('target')
 subdir('dump')
 
-block_ss.add(files(
-  'block.c',
-  'blockjob.c',
-  'job.c',
-  'qemu-io-cmds.c',
-))
-block_ss.add(when: 'CONFIG_REPLICATION', if_true: files('replication.c'))
-
-subdir('nbd')
-subdir('scsi')
-subdir('block')
-
-blockdev_ss.add(files(
-  'blockdev.c',
-  'blockdev-nbd.c',
-  'iothread.c',
-  'job-qmp.c',
-), gnutls)
-
-# os-posix.c contains POSIX-specific functions used by qemu-storage-daemon,
-# os-win32.c does not
-blockdev_ss.add(when: 'CONFIG_POSIX', if_true: files('os-posix.c'))
-softmmu_ss.add(when: 'CONFIG_WIN32', if_true: [files('os-win32.c')])
+if have_block
+  block_ss.add(files(
+    'block.c',
+    'blockjob.c',
+    'job.c',
+    'qemu-io-cmds.c',
+  ))
+  block_ss.add(when: 'CONFIG_REPLICATION', if_true: files('replication.c'))
+
+  subdir('nbd')
+  subdir('scsi')
+  subdir('block')
+
+  blockdev_ss.add(files(
+    'blockdev.c',
+    'blockdev-nbd.c',
+    'iothread.c',
+    'job-qmp.c',
+  ), gnutls)
+
+  # os-posix.c contains POSIX-specific functions used by qemu-storage-daemon,
+  # os-win32.c does not
+  blockdev_ss.add(when: 'CONFIG_POSIX', if_true: files('os-posix.c'))
+  softmmu_ss.add(when: 'CONFIG_WIN32', if_true: [files('os-win32.c')])
+endif
 
 common_ss.add(files('cpus-common.c'))
 
-- 
2.29.2

[PULL 25/46] meson: Merge trace_events_subdirs array

[Paolo Bonzini]

From: Philippe Mathieu-Daudé <philmd@redhat.com>

The trace_events_subdirs array is split in two different
locations, merge it as one.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Claudio Fontana <cfontana@suse.de>
Message-Id: <20210122204441.2145197-7-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 meson.build | 28 +++++++++++++---------------
 1 file changed, 13 insertions(+), 15 deletions(-)

diff --git a/meson.build b/meson.build
index 0ca73d0102..da21812064 100644
--- a/meson.build
+++ b/meson.build
@@ -1744,7 +1744,20 @@ trace_events_subdirs = [
   'accel/kvm',
   'accel/tcg',
   'crypto',
+  'hw/core',
+  'qapi',
+  'qom',
   'monitor',
+  'target/arm',
+  'target/hppa',
+  'target/i386',
+  'target/i386/kvm',
+  'target/mips',
+  'target/ppc',
+  'target/riscv',
+  'target/s390x',
+  'target/sparc',
+  'util',
 ]
 if have_user
   trace_events_subdirs += [ 'linux-user' ]
@@ -1817,21 +1830,6 @@ if have_system
     'ui',
   ]
 endif
-trace_events_subdirs += [
-  'hw/core',
-  'qapi',
-  'qom',
-  'target/arm',
-  'target/hppa',
-  'target/i386',
-  'target/i386/kvm',
-  'target/mips',
-  'target/ppc',
-  'target/riscv',
-  'target/s390x',
-  'target/sparc',
-  'util',
-]
 
 vhost_user = not_found
 if 'CONFIG_VHOST_USER' in config_host
-- 
2.29.2

[PULL 26/46] meson: Restrict some trace event directories to user/system emulation

[Paolo Bonzini]

From: Philippe Mathieu-Daudé <philmd@redhat.com>

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210122204441.2145197-8-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 meson.build | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

diff --git a/meson.build b/meson.build
index da21812064..d6eb880b89 100644
--- a/meson.build
+++ b/meson.build
@@ -1741,22 +1741,10 @@ target_softmmu_arch = {}
 # TODO: add each directory to the subdirs from its own meson.build, once
 # we have those
 trace_events_subdirs = [
-  'accel/kvm',
-  'accel/tcg',
   'crypto',
-  'hw/core',
   'qapi',
   'qom',
   'monitor',
-  'target/arm',
-  'target/hppa',
-  'target/i386',
-  'target/i386/kvm',
-  'target/mips',
-  'target/ppc',
-  'target/riscv',
-  'target/s390x',
-  'target/sparc',
   'util',
 ]
 if have_user
@@ -1773,6 +1761,7 @@ if have_block
 endif
 if have_system
   trace_events_subdirs += [
+    'accel/kvm',
     'audio',
     'backends',
     'backends/tpm',
@@ -1830,6 +1819,21 @@ if have_system
     'ui',
   ]
 endif
+if have_system or have_user
+  trace_events_subdirs += [
+    'accel/tcg',
+    'hw/core',
+    'target/arm',
+    'target/hppa',
+    'target/i386',
+    'target/i386/kvm',
+    'target/mips',
+    'target/ppc',
+    'target/riscv',
+    'target/s390x',
+    'target/sparc',
+  ]
+endif
 
 vhost_user = not_found
 if 'CONFIG_VHOST_USER' in config_host
-- 
2.29.2

[PULL 27/46] meson: Restrict emulation code

[Paolo Bonzini]

From: Philippe Mathieu-Daudé <philmd@redhat.com>

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210122204441.2145197-9-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 meson.build | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/meson.build b/meson.build
index d6eb880b89..e3ef660670 100644
--- a/meson.build
+++ b/meson.build
@@ -1867,16 +1867,18 @@ libqemuutil = static_library('qemuutil',
 qemuutil = declare_dependency(link_with: libqemuutil,
                               sources: genh + version_res)
 
-decodetree = generator(find_program('scripts/decodetree.py'),
-                       output: 'decode-@BASENAME@.c.inc',
-                       arguments: ['@INPUT@', '@EXTRA_ARGS@', '-o', '@OUTPUT@'])
+if have_system or have_user
+  decodetree = generator(find_program('scripts/decodetree.py'),
+                         output: 'decode-@BASENAME@.c.inc',
+                         arguments: ['@INPUT@', '@EXTRA_ARGS@', '-o', '@OUTPUT@'])
+  subdir('libdecnumber')
+  subdir('target')
+endif
 
 subdir('audio')
 subdir('io')
 subdir('chardev')
 subdir('fsdev')
-subdir('libdecnumber')
-subdir('target')
 subdir('dump')
 
 if have_block
-- 
2.29.2

[PULL 28/46] qapi/meson: Restrict qdev code to system-mode emulation

[Paolo Bonzini]

From: Philippe Mathieu-Daudé <philmd@redhat.com>

Beside a CPU device, user-mode emulation doesn't access
anything else from qdev subsystem.

Tools don't need anything from qdev.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210122204441.2145197-10-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 MAINTAINERS       |  1 +
 qapi/meson.build  |  6 +++++-
 stubs/meson.build |  2 ++
 stubs/qdev.c      | 23 +++++++++++++++++++++++
 4 files changed, 31 insertions(+), 1 deletion(-)
 create mode 100644 stubs/qdev.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 8d8b0bf966..ca74617cc3 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2539,6 +2539,7 @@ F: qapi/qom.json
 F: qapi/qdev.json
 F: scripts/coccinelle/qom-parent-type.cocci
 F: softmmu/qdev-monitor.c
+F: stubs/qdev.c
 F: qom/
 F: tests/check-qom-interface.c
 F: tests/check-qom-proplist.c
diff --git a/qapi/meson.build b/qapi/meson.build
index ab68e7900e..2839871b47 100644
--- a/qapi/meson.build
+++ b/qapi/meson.build
@@ -35,7 +35,6 @@ qapi_all_modules = [
   'misc-target',
   'net',
   'pragma',
-  'qdev',
   'pci',
   'qom',
   'rdma',
@@ -49,6 +48,11 @@ qapi_all_modules = [
   'ui',
   'yank',
 ]
+if have_system
+  qapi_all_modules += [
+    'qdev',
+  ]
+endif
 
 qapi_storage_daemon_modules = [
   'block-core',
diff --git a/stubs/meson.build b/stubs/meson.build
index 1a656cd070..a054d5877f 100644
--- a/stubs/meson.build
+++ b/stubs/meson.build
@@ -53,4 +53,6 @@ endif
 if have_system
   stub_ss.add(files('semihost.c'))
   stub_ss.add(files('xen-hw-stub.c'))
+else
+  stub_ss.add(files('qdev.c'))
 endif
diff --git a/stubs/qdev.c b/stubs/qdev.c
new file mode 100644
index 0000000000..92e6143134
--- /dev/null
+++ b/stubs/qdev.c
@@ -0,0 +1,23 @@
+/*
+ * QOM stubs
+ *
+ * Copyright (c) 2021 Red Hat, Inc.
+ *
+ * Author:
+ *   Philippe Mathieu-Daudé <philmd@redhat.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * 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/qapi-events-qdev.h"
+
+void qapi_event_send_device_deleted(bool has_device,
+                                    const char *device,
+                                    const char *path)
+{
+    /* Nothing to do. */
+}
-- 
2.29.2

[PULL 29/46] qapi/meson: Remove QMP from user-mode emulation

[Paolo Bonzini]

From: Philippe Mathieu-Daudé <philmd@redhat.com>

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210122204441.2145197-11-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 qapi/meson.build  | 10 +++++++---
 tests/meson.build |  7 ++++++-
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/qapi/meson.build b/qapi/meson.build
index 2839871b47..b301a46f04 100644
--- a/qapi/meson.build
+++ b/qapi/meson.build
@@ -4,14 +4,18 @@ util_ss.add(files(
   'qapi-dealloc-visitor.c',
   'qapi-util.c',
   'qapi-visit-core.c',
-  'qmp-dispatch.c',
-  'qmp-event.c',
-  'qmp-registry.c',
   'qobject-input-visitor.c',
   'qobject-output-visitor.c',
   'string-input-visitor.c',
   'string-output-visitor.c',
 ))
+if have_system or have_tools
+  util_ss.add(files(
+    'qmp-dispatch.c',
+    'qmp-event.c',
+    'qmp-registry.c',
+  ))
+endif
 
 qapi_all_modules = [
   'acpi',
diff --git a/tests/meson.build b/tests/meson.build
index 6f1ff926d2..7d7da6a636 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -86,7 +86,6 @@ tests = {
   'test-qobject-input-visitor': [testqapi],
   'test-string-input-visitor': [testqapi],
   'test-string-output-visitor': [testqapi],
-  'test-qmp-event': [testqapi],
   'test-opts-visitor': [testqapi],
   'test-visitor-serialization': [testqapi],
   'test-bitmap': [],
@@ -117,6 +116,12 @@ tests = {
   'test-qapi-util': [],
 }
 
+if have_system or have_tools
+  tests += {
+    'test-qmp-event': [testqapi],
+  }
+endif
+
 test_deps = {
   'test-qht-par': qht_bench,
 }
-- 
2.29.2

[PULL 30/46] qapi/meson: Restrict system-mode specific modules

[Paolo Bonzini]

From: Philippe Mathieu-Daudé <philmd@redhat.com>

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210122204441.2145197-12-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 qapi/meson.build | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/qapi/meson.build b/qapi/meson.build
index b301a46f04..7aca8d5048 100644
--- a/qapi/meson.build
+++ b/qapi/meson.build
@@ -18,8 +18,6 @@ if have_system or have_tools
 endif
 
 qapi_all_modules = [
-  'acpi',
-  'audio',
   'authz',
   'block',
   'block-core',
@@ -39,14 +37,10 @@ qapi_all_modules = [
   'misc-target',
   'net',
   'pragma',
-  'pci',
   'qom',
-  'rdma',
   'replay',
-  'rocker',
   'run-state',
   'sockets',
-  'tpm',
   'trace',
   'transaction',
   'ui',
@@ -54,7 +48,13 @@ qapi_all_modules = [
 ]
 if have_system
   qapi_all_modules += [
+    'acpi',
+    'audio',
     'qdev',
+    'pci',
+    'rdma',
+    'rocker',
+    'tpm',
   ]
 endif
 
-- 
2.29.2

[PULL 31/46] qapi/meson: Restrict UI module to system emulation and tools

[Paolo Bonzini]

From: Philippe Mathieu-Daudé <philmd@redhat.com>

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210122204441.2145197-13-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 qapi/meson.build | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/qapi/meson.build b/qapi/meson.build
index 7aca8d5048..0652569bc4 100644
--- a/qapi/meson.build
+++ b/qapi/meson.build
@@ -43,7 +43,6 @@ qapi_all_modules = [
   'sockets',
   'trace',
   'transaction',
-  'ui',
   'yank',
 ]
 if have_system
@@ -57,6 +56,11 @@ if have_system
     'tpm',
   ]
 endif
+if have_system or have_tools
+  qapi_all_modules += [
+    'ui',
+  ]
+endif
 
 qapi_storage_daemon_modules = [
   'block-core',
-- 
2.29.2

[PULL 32/46] accel/kvm/kvm-all: Fix wrong return code handling in dirty log code

[Paolo Bonzini]

From: Thomas Huth <thuth@redhat.com>

The kvm_vm_ioctl() wrapper already returns -errno if the ioctl itself
returned -1, so the callers of kvm_vm_ioctl() should not check for -1
but for a value < 0 instead.

This problem has been fixed once already in commit b533f658a98325d0e4
but that commit missed that the ENOENT error code is not fatal for
this ioctl, so the commit has been reverted in commit 50212d6346f33d6e
since the problem occurred close to a pending release at that point
in time. The plan was to fix it properly after the release, but it
seems like this has been forgotten. So let's do it now finally instead.

Resolves: https://bugs.launchpad.net/qemu/+bug/1294227
Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210129084354.42928-1-thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 accel/kvm/kvm-all.c | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index e72a19aaf8..47516913b7 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -644,16 +644,19 @@ static int kvm_physical_sync_dirty_bitmap(KVMMemoryListener *kml,
 
         d.dirty_bitmap = mem->dirty_bmap;
         d.slot = mem->slot | (kml->as_id << 16);
-        if (kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d) == -1) {
-            DPRINTF("ioctl failed %d\n", errno);
-            ret = -1;
+        ret = kvm_vm_ioctl(s, KVM_GET_DIRTY_LOG, &d);
+        if (ret == -ENOENT) {
+            /* kernel does not have dirty bitmap in this slot */
+            ret = 0;
+        } else if (ret < 0) {
+            error_report("ioctl KVM_GET_DIRTY_LOG failed: %d", errno);
             goto out;
+        } else {
+            subsection.offset_within_region += slot_offset;
+            subsection.size = int128_make64(slot_size);
+            kvm_get_dirty_pages_log_range(&subsection, d.dirty_bitmap);
         }
 
-        subsection.offset_within_region += slot_offset;
-        subsection.size = int128_make64(slot_size);
-        kvm_get_dirty_pages_log_range(&subsection, d.dirty_bitmap);
-
         slot_offset += slot_size;
         start_addr += slot_size;
         size -= slot_size;
@@ -750,8 +753,8 @@ static int kvm_log_clear_one_slot(KVMSlot *mem, int as_id, uint64_t start,
     d.num_pages = bmap_npages;
     d.slot = mem->slot | (as_id << 16);
 
-    if (kvm_vm_ioctl(s, KVM_CLEAR_DIRTY_LOG, &d) == -1) {
-        ret = -errno;
+    ret = kvm_vm_ioctl(s, KVM_CLEAR_DIRTY_LOG, &d);
+    if (ret < 0 && ret != -ENOENT) {
         error_report("%s: KVM_CLEAR_DIRTY_LOG failed, slot=%d, "
                      "start=0x%"PRIx64", size=0x%"PRIx32", errno=%d",
                      __func__, d.slot, (uint64_t)d.first_page,
-- 
2.29.2

[PULL 33/46] replay: fix replay of the interrupts

[Paolo Bonzini]

From: Pavel Dovgalyuk <pavel.dovgalyuk@ispras.ru>

Sometimes interrupt event comes at the same time with
the virtual timers. In this case replay tries to proceed
the timers, because deadline for them is zero.
This patch allows processing interrupts and exceptions
by entering the vCPU execution loop, when deadline is zero,
but checkpoint associated with virtual timers is not ready
to be replayed.

Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru>

Message-Id: <161216312794.2030770.1709657858900983160.stgit@pasha-ThinkPad-X280>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 accel/tcg/tcg-accel-ops-icount.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/accel/tcg/tcg-accel-ops-icount.c b/accel/tcg/tcg-accel-ops-icount.c
index 87762b469c..13b8fbeb69 100644
--- a/accel/tcg/tcg-accel-ops-icount.c
+++ b/accel/tcg/tcg-accel-ops-icount.c
@@ -81,7 +81,13 @@ void icount_handle_deadline(void)
     int64_t deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL,
                                                   QEMU_TIMER_ATTR_ALL);
 
-    if (deadline == 0) {
+    /*
+     * Instructions, interrupts, and exceptions are processed in cpu-exec.
+     * Don't interrupt cpu thread, when these events are waiting
+     * (i.e., there is no checkpoint)
+     */
+    if (deadline == 0
+        && (replay_mode != REPLAY_MODE_PLAY || replay_has_checkpoint())) {
         icount_notify_aio_contexts();
     }
 }
-- 
2.29.2

[PULL 34/46] pc-bios/descriptors: fix paths in json files

[Paolo Bonzini]

From: Sergei Trofimovich <slyfox@gentoo.org>

Before the change /usr/share/qemu/firmware/50-edk2-x86_64-secure.json
contained the relative path:
            "filename": "share/qemu/edk2-x86_64-secure-code.fd",
            "filename": "share/qemu/edk2-i386-vars.fd",

After then change the paths are absolute:
            "filename": "/usr/share/qemu/edk2-x86_64-secure-code.fd",
            "filename": "/usr/share/qemu/edk2-i386-vars.fd",

The regression appeared in qemu-5.2.0 (seems to be related
to meson port).

CC: Paolo Bonzini <pbonzini@redhat.com>
CC: "Marc-André Lureau" <marcandre.lureau@redhat.com>
CC: "Philippe Mathieu-Daudé" <philmd@redhat.com>
Bug: https://bugs.gentoo.org/766743
Bug: https://bugs.launchpad.net/qemu/+bug/1913012
Signed-off-by: Jannik Glückert <jannik.glueckert@gmail.com>
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Message-Id: <20210131143434.2513363-1-slyfox@gentoo.org>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 pc-bios/descriptors/meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pc-bios/descriptors/meson.build b/pc-bios/descriptors/meson.build
index ac6ec66b00..29efa16d99 100644
--- a/pc-bios/descriptors/meson.build
+++ b/pc-bios/descriptors/meson.build
@@ -9,7 +9,7 @@ if install_edk2_blobs
   ]
     configure_file(input: files(f),
                    output: f,
-                   configuration: {'DATADIR': qemu_datadir},
+                   configuration: {'DATADIR': get_option('prefix') / qemu_datadir},
                    install: get_option('install_blobs'),
                    install_dir: qemu_datadir / 'firmware')
   endforeach
-- 
2.29.2

[PULL 35/46] replay: rng-builtin support

[Paolo Bonzini]

From: Pavel Dovgalyuk <pavel.dovgalyuk@ispras.ru>

This patch enables using rng-builtin with record/replay
by making the callbacks deterministic.

Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru>
Message-Id: <161233201286.170686.7858208964037376305.stgit@pasha-ThinkPad-X280>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 backends/rng-builtin.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/backends/rng-builtin.c b/backends/rng-builtin.c
index f38dff117d..f367eb665c 100644
--- a/backends/rng-builtin.c
+++ b/backends/rng-builtin.c
@@ -10,6 +10,7 @@
 #include "qemu/main-loop.h"
 #include "qemu/guest-random.h"
 #include "qom/object.h"
+#include "sysemu/replay.h"
 
 OBJECT_DECLARE_SIMPLE_TYPE(RngBuiltin, RNG_BUILTIN)
 
@@ -37,7 +38,7 @@ static void rng_builtin_request_entropy(RngBackend *b, RngRequest *req)
 {
     RngBuiltin *s = RNG_BUILTIN(b);
 
-    qemu_bh_schedule(s->bh);
+    replay_bh_schedule_event(s->bh);
 }
 
 static void rng_builtin_init(Object *obj)
-- 
2.29.2

[PULL 36/46] cpu-throttle: Remove timer_mod() from cpu_throttle_set()

[Paolo Bonzini]

From: Utkarsh Tripathi <utkarsh.tripathi@nutanix.com>

During migrations, after each iteration, cpu_throttle_set() is called,
which irrespective of input, re-arms the timer according to value of
new_throttle_pct. This causes cpu_throttle_thread() to be delayed in
getting scheduled and consqeuntly lets guest run for more time than what
the throttle value should allow. This leads to spikes in guest throughput
at high cpu-throttle percentage whenever cpu_throttle_set() is called.

A solution would be not to modify the timer immediately in
cpu_throttle_set(), instead, only modify throttle_percentage so that the
throttle would automatically adjust to the required percentage when
cpu_throttle_timer_tick() is invoked.

Manually tested the patch using following configuration:

Guest:
Centos7 (3.10.0-123.el7.x86_64)
Total Memory - 64GB , CPUs - 16
Tool used - stress (1.0.4)
Workload - stress --vm 32 --vm-bytes 1G --vm-keep

Migration Parameters:
Network Bandwidth - 500MBPS
cpu-throttle-initial - 99

Results:
With timer_mod(): fails to converge, continues indefinitely
Without timer_mod(): converges in 249 sec

Signed-off-by: Utkarsh Tripathi <utkarsh.tripathi@nutanix.com>
Message-Id: <1609420384-119407-1-git-send-email-utkarsh.tripathi@nutanix.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 softmmu/cpu-throttle.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/softmmu/cpu-throttle.c b/softmmu/cpu-throttle.c
index 2ec4b8e0bc..8c2144ab95 100644
--- a/softmmu/cpu-throttle.c
+++ b/softmmu/cpu-throttle.c
@@ -90,14 +90,21 @@ static void cpu_throttle_timer_tick(void *opaque)
 
 void cpu_throttle_set(int new_throttle_pct)
 {
+    /*
+     * boolean to store whether throttle is already active or not,
+     * before modifying throttle_percentage
+     */
+    bool throttle_active = cpu_throttle_active();
+
     /* Ensure throttle percentage is within valid range */
     new_throttle_pct = MIN(new_throttle_pct, CPU_THROTTLE_PCT_MAX);
     new_throttle_pct = MAX(new_throttle_pct, CPU_THROTTLE_PCT_MIN);
 
     qatomic_set(&throttle_percentage, new_throttle_pct);
 
-    timer_mod(throttle_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL_RT) +
-                                       CPU_THROTTLE_TIMESLICE_NS);
+    if (!throttle_active) {
+        cpu_throttle_timer_tick(NULL);
+    }
 }
 
 void cpu_throttle_stop(void)
-- 
2.29.2

[PULL 37/46] hw/pci-host: add pci-intack write method

[Paolo Bonzini]

From: Prasad J Pandit <pjp@fedoraproject.org>

Add pci-intack mmio write method to avoid NULL pointer dereference
issue.

Reported-by: Lei Sun <slei.casper@gmail.com>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Message-Id: <20200811114133.672647-2-ppandit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/pci-host/prep.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/hw/pci-host/prep.c b/hw/pci-host/prep.c
index 0469db8c1d..0a9162fba9 100644
--- a/hw/pci-host/prep.c
+++ b/hw/pci-host/prep.c
@@ -27,6 +27,7 @@
 #include "qemu-common.h"
 #include "qemu/datadir.h"
 #include "qemu/units.h"
+#include "qemu/log.h"
 #include "qapi/error.h"
 #include "hw/pci/pci.h"
 #include "hw/pci/pci_bus.h"
@@ -121,8 +122,15 @@ static uint64_t raven_intack_read(void *opaque, hwaddr addr,
     return pic_read_irq(isa_pic);
 }
 
+static void raven_intack_write(void *opaque, hwaddr addr,
+                                        uint64_t data, unsigned size)
+{
+    qemu_log_mask(LOG_UNIMP, "%s not implemented\n", __func__);
+}
+
 static const MemoryRegionOps raven_intack_ops = {
     .read = raven_intack_read,
+    .write = raven_intack_write,
     .valid = {
         .max_access_size = 1,
     },
-- 
2.29.2

[PULL 38/46] pci-host: designware: add pcie-msi read method

[Paolo Bonzini]

From: Prasad J Pandit <pjp@fedoraproject.org>

Add pcie-msi mmio read method to avoid NULL pointer dereference
issue.

Reported-by: Lei Sun <slei.casper@gmail.com>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Message-Id: <20200811114133.672647-3-ppandit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/pci-host/designware.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/hw/pci-host/designware.c b/hw/pci-host/designware.c
index f9fb97a3e3..bde3a343a2 100644
--- a/hw/pci-host/designware.c
+++ b/hw/pci-host/designware.c
@@ -21,6 +21,7 @@
 #include "qemu/osdep.h"
 #include "qapi/error.h"
 #include "qemu/module.h"
+#include "qemu/log.h"
 #include "hw/pci/msi.h"
 #include "hw/pci/pci_bridge.h"
 #include "hw/pci/pci_host.h"
@@ -63,6 +64,23 @@ designware_pcie_root_to_host(DesignwarePCIERoot *root)
     return DESIGNWARE_PCIE_HOST(bus->parent);
 }
 
+static uint64_t designware_pcie_root_msi_read(void *opaque, hwaddr addr,
+                                              unsigned size)
+{
+    /*
+     * Attempts to read from the MSI address are undefined in
+     * the PCI specifications. For this hardware, the datasheet
+     * specifies that a read from the magic address is simply not
+     * intercepted by the MSI controller, and will go out to the
+     * AHB/AXI bus like any other PCI-device-initiated DMA read.
+     * This is not trivial to implement in QEMU, so since
+     * well-behaved guests won't ever ask a PCI device to DMA from
+     * this address we just log the missing functionality.
+     */
+    qemu_log_mask(LOG_UNIMP, "%s not implemented\n", __func__);
+    return 0;
+}
+
 static void designware_pcie_root_msi_write(void *opaque, hwaddr addr,
                                            uint64_t val, unsigned len)
 {
@@ -77,6 +95,7 @@ static void designware_pcie_root_msi_write(void *opaque, hwaddr addr,
 }
 
 static const MemoryRegionOps designware_pci_host_msi_ops = {
+    .read = designware_pcie_root_msi_read,
     .write = designware_pcie_root_msi_write,
     .endianness = DEVICE_LITTLE_ENDIAN,
     .valid = {
-- 
2.29.2

[PULL 39/46] vfio: add quirk device write method

[Paolo Bonzini]

From: Prasad J Pandit <pjp@fedoraproject.org>

Add vfio quirk device mmio write method to avoid NULL pointer
dereference issue.

Reported-by: Lei Sun <slei.casper@gmail.com>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Message-Id: <20200811114133.672647-4-ppandit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/vfio/pci-quirks.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/hw/vfio/pci-quirks.c b/hw/vfio/pci-quirks.c
index fc8d63c850..c5c4c61d01 100644
--- a/hw/vfio/pci-quirks.c
+++ b/hw/vfio/pci-quirks.c
@@ -14,6 +14,7 @@
 #include CONFIG_DEVICES
 #include "exec/memop.h"
 #include "qemu/units.h"
+#include "qemu/log.h"
 #include "qemu/error-report.h"
 #include "qemu/main-loop.h"
 #include "qemu/module.h"
@@ -264,8 +265,15 @@ static uint64_t vfio_ati_3c3_quirk_read(void *opaque,
     return data;
 }
 
+static void vfio_ati_3c3_quirk_write(void *opaque, hwaddr addr,
+                                        uint64_t data, unsigned size)
+{
+    qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid access\n", __func__);
+}
+
 static const MemoryRegionOps vfio_ati_3c3_quirk = {
     .read = vfio_ati_3c3_quirk_read,
+    .write = vfio_ati_3c3_quirk_write,
     .endianness = DEVICE_LITTLE_ENDIAN,
 };
 
-- 
2.29.2

[PULL 40/46] prep: add ppc-parity write method

[Paolo Bonzini]

From: Prasad J Pandit <pjp@fedoraproject.org>

Add ppc-parity mmio write method to avoid NULL pointer dereference
issue.

Reported-by: Lei Sun <slei.casper@gmail.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
Message-Id: <20200811114133.672647-5-ppandit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/ppc/prep_systemio.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/hw/ppc/prep_systemio.c b/hw/ppc/prep_systemio.c
index 4e48ef245c..b2bd783248 100644
--- a/hw/ppc/prep_systemio.c
+++ b/hw/ppc/prep_systemio.c
@@ -23,6 +23,7 @@
  */
 
 #include "qemu/osdep.h"
+#include "qemu/log.h"
 #include "hw/irq.h"
 #include "hw/isa/isa.h"
 #include "hw/qdev-properties.h"
@@ -235,8 +236,15 @@ static uint64_t ppc_parity_error_readl(void *opaque, hwaddr addr,
     return val;
 }
 
+static void ppc_parity_error_writel(void *opaque, hwaddr addr,
+                                    uint64_t data, unsigned size)
+{
+    qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid access\n", __func__);
+}
+
 static const MemoryRegionOps ppc_parity_error_ops = {
     .read = ppc_parity_error_readl,
+    .write = ppc_parity_error_writel,
     .valid = {
         .min_access_size = 4,
         .max_access_size = 4,
-- 
2.29.2

[PULL 41/46] nvram: add nrf51_soc flash read method

[Paolo Bonzini]

From: Prasad J Pandit <pjp@fedoraproject.org>

Add nrf51_soc mmio read method to avoid NULL pointer dereference
issue.

Reported-by: Lei Sun <slei.casper@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
Message-Id: <20200811114133.672647-6-ppandit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/nvram/nrf51_nvm.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/hw/nvram/nrf51_nvm.c b/hw/nvram/nrf51_nvm.c
index f2283c1a8d..7b3460d52d 100644
--- a/hw/nvram/nrf51_nvm.c
+++ b/hw/nvram/nrf51_nvm.c
@@ -273,6 +273,15 @@ static const MemoryRegionOps io_ops = {
         .endianness = DEVICE_LITTLE_ENDIAN,
 };
 
+static uint64_t flash_read(void *opaque, hwaddr offset, unsigned size)
+{
+    /*
+     * This is a rom_device MemoryRegion which is always in
+     * romd_mode (we never put it in MMIO mode), so reads always
+     * go directly to RAM and never come here.
+     */
+    g_assert_not_reached();
+}
 
 static void flash_write(void *opaque, hwaddr offset, uint64_t value,
         unsigned int size)
@@ -300,6 +309,7 @@ static void flash_write(void *opaque, hwaddr offset, uint64_t value,
 
 
 static const MemoryRegionOps flash_ops = {
+    .read = flash_read,
     .write = flash_write,
     .valid.min_access_size = 4,
     .valid.max_access_size = 4,
-- 
2.29.2

[PULL 42/46] spapr_pci: add spapr msi read method

[Paolo Bonzini]

From: Prasad J Pandit <pjp@fedoraproject.org>

Add spapr msi mmio read method to avoid NULL pointer dereference
issue.

Reported-by: Lei Sun <slei.casper@gmail.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Message-Id: <20200811114133.672647-7-ppandit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/ppc/spapr_pci.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index 76d7c91e9c..b89f810034 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -53,6 +53,7 @@
 #include "sysemu/hostmem.h"
 #include "sysemu/numa.h"
 #include "hw/ppc/spapr_numa.h"
+#include "qemu/log.h"
 
 /* Copied from the kernel arch/powerpc/platforms/pseries/msi.c */
 #define RTAS_QUERY_FN           0
@@ -739,6 +740,12 @@ static PCIINTxRoute spapr_route_intx_pin_to_irq(void *opaque, int pin)
     return route;
 }
 
+static uint64_t spapr_msi_read(void *opaque, hwaddr addr, unsigned size)
+{
+    qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid access\n", __func__);
+    return 0;
+}
+
 /*
  * MSI/MSIX memory region implementation.
  * The handler handles both MSI and MSIX.
@@ -756,8 +763,11 @@ static void spapr_msi_write(void *opaque, hwaddr addr,
 }
 
 static const MemoryRegionOps spapr_msi_ops = {
-    /* There is no .read as the read result is undefined by PCI spec */
-    .read = NULL,
+    /*
+     * .read result is undefined by PCI spec.
+     * define .read method to avoid assert failure in memory_region_init_io
+     */
+    .read = spapr_msi_read,
     .write = spapr_msi_write,
     .endianness = DEVICE_LITTLE_ENDIAN
 };
-- 
2.29.2

[PULL 43/46] tz-ppc: add dummy read/write methods

[Paolo Bonzini]

From: Prasad J Pandit <pjp@fedoraproject.org>

Add tz-ppc-dummy mmio read/write methods to avoid assert failure
during initialisation.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
Message-Id: <20200811114133.672647-8-ppandit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/misc/tz-ppc.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/hw/misc/tz-ppc.c b/hw/misc/tz-ppc.c
index 6431257b52..36495c68e7 100644
--- a/hw/misc/tz-ppc.c
+++ b/hw/misc/tz-ppc.c
@@ -196,7 +196,21 @@ static bool tz_ppc_dummy_accepts(void *opaque, hwaddr addr,
     g_assert_not_reached();
 }
 
+static uint64_t tz_ppc_dummy_read(void *opaque, hwaddr addr, unsigned size)
+{
+    g_assert_not_reached();
+}
+
+static void tz_ppc_dummy_write(void *opaque, hwaddr addr,
+                                        uint64_t data, unsigned size)
+{
+    g_assert_not_reached();
+}
+
 static const MemoryRegionOps tz_ppc_dummy_ops = {
+    /* define r/w methods to avoid assert failure in memory_region_init_io */
+    .read = tz_ppc_dummy_read,
+    .write = tz_ppc_dummy_write,
     .valid.accepts = tz_ppc_dummy_accepts,
 };
 
-- 
2.29.2

[PULL 44/46] imx7-ccm: add digprog mmio write method

[Paolo Bonzini]

From: Prasad J Pandit <pjp@fedoraproject.org>

Add digprog mmio write method to avoid assert failure during
initialisation.

Reviewed-by: Li Qiang <liq3ea@gmail.com>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Message-Id: <20200811114133.672647-9-ppandit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/misc/imx7_ccm.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/hw/misc/imx7_ccm.c b/hw/misc/imx7_ccm.c
index 02fc1ae8d0..075159e497 100644
--- a/hw/misc/imx7_ccm.c
+++ b/hw/misc/imx7_ccm.c
@@ -131,8 +131,16 @@ static const struct MemoryRegionOps imx7_set_clr_tog_ops = {
     },
 };
 
+static void imx7_digprog_write(void *opaque, hwaddr addr,
+                                        uint64_t data, unsigned size)
+{
+    qemu_log_mask(LOG_GUEST_ERROR,
+                  "Guest write to read-only ANALOG_DIGPROG register\n");
+}
+
 static const struct MemoryRegionOps imx7_digprog_ops = {
     .read = imx7_set_clr_tog_read,
+    .write = imx7_digprog_write,
     .endianness = DEVICE_NATIVE_ENDIAN,
     .impl = {
         .min_access_size = 4,
-- 
2.29.2

[PULL 45/46] target/i386: Add support for save/load IA32_PKRS MSR

[Paolo Bonzini]

From: Chenyi Qiang <chenyi.qiang@intel.com>

PKS introduces MSR IA32_PKRS(0x6e1) to manage the supervisor protection
key rights. Page access and writes can be managed via the MSR update
without TLB flushes when permissions change.

Add the support to save/load IA32_PKRS MSR in guest.

Signed-off-by: Chenyi Qiang <chenyi.qiang@intel.com>
Message-Id: <20210205083325.13880-2-chenyi.qiang@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/kvm/kvm.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c
index 4788139128..e97f841757 100644
--- a/target/i386/kvm/kvm.c
+++ b/target/i386/kvm/kvm.c
@@ -113,6 +113,7 @@ static bool has_msr_vmx_vmfunc;
 static bool has_msr_ucode_rev;
 static bool has_msr_vmx_procbased_ctls2;
 static bool has_msr_perf_capabs;
+static bool has_msr_pkrs;
 
 static uint32_t has_architectural_pmu_version;
 static uint32_t num_architectural_pmu_gp_counters;
@@ -2087,6 +2088,9 @@ static int kvm_get_supported_msrs(KVMState *s)
             case MSR_IA32_VMX_PROCBASED_CTLS2:
                 has_msr_vmx_procbased_ctls2 = true;
                 break;
+            case MSR_IA32_PKRS:
+                has_msr_pkrs = true;
+                break;
             }
         }
     }
@@ -2814,6 +2818,9 @@ static int kvm_put_msrs(X86CPU *cpu, int level)
     if (has_msr_smi_count) {
         kvm_msr_entry_add(cpu, MSR_SMI_COUNT, env->msr_smi_count);
     }
+    if (has_msr_pkrs) {
+        kvm_msr_entry_add(cpu, MSR_IA32_PKRS, env->pkrs);
+    }
     if (has_msr_bndcfgs) {
         kvm_msr_entry_add(cpu, MSR_IA32_BNDCFGS, env->msr_bndcfgs);
     }
@@ -3205,6 +3212,9 @@ static int kvm_get_msrs(X86CPU *cpu)
     if (has_msr_feature_control) {
         kvm_msr_entry_add(cpu, MSR_IA32_FEATURE_CONTROL, 0);
     }
+    if (has_msr_pkrs) {
+        kvm_msr_entry_add(cpu, MSR_IA32_PKRS, 0);
+    }
     if (has_msr_bndcfgs) {
         kvm_msr_entry_add(cpu, MSR_IA32_BNDCFGS, 0);
     }
@@ -3475,6 +3485,9 @@ static int kvm_get_msrs(X86CPU *cpu)
         case MSR_IA32_UMWAIT_CONTROL:
             env->umwait = msrs[i].data;
             break;
+        case MSR_IA32_PKRS:
+            env->pkrs = msrs[i].data;
+            break;
         default:
             if (msrs[i].index >= MSR_MC0_CTL &&
                 msrs[i].index < MSR_MC0_CTL + (env->mcg_cap & 0xff) * 4) {
-- 
2.29.2

[PULL 46/46] target/i386: Expose VMX entry/exit load pkrs control bits

[Paolo Bonzini]

From: Chenyi Qiang <chenyi.qiang@intel.com>

Expose the VMX exit/entry load pkrs control bits in
VMX_TRUE_EXIT_CTLS/VMX_TRUE_ENTRY_CTLS MSRs to guest, which supports the
PKS in nested VM.

Signed-off-by: Chenyi Qiang <chenyi.qiang@intel.com>
Message-Id: <20210205083325.13880-3-chenyi.qiang@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/cpu.c | 4 ++--
 target/i386/cpu.h | 2 ++
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 0b0d65c21c..9c3d2d60b7 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -1215,7 +1215,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
             "vmx-exit-save-efer", "vmx-exit-load-efer",
                 "vmx-exit-save-preemption-timer", "vmx-exit-clear-bndcfgs",
             NULL, "vmx-exit-clear-rtit-ctl", NULL, NULL,
-            NULL, NULL, NULL, NULL,
+            NULL, "vmx-exit-load-pkrs", NULL, NULL,
         },
         .msr = {
             .index = MSR_IA32_VMX_TRUE_EXIT_CTLS,
@@ -1230,7 +1230,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
             NULL, "vmx-entry-ia32e-mode", NULL, NULL,
             NULL, "vmx-entry-load-perf-global-ctrl", "vmx-entry-load-pat", "vmx-entry-load-efer",
             "vmx-entry-load-bndcfgs", NULL, "vmx-entry-load-rtit-ctl", NULL,
-            NULL, NULL, NULL, NULL,
+            NULL, NULL, "vmx-entry-load-pkrs", NULL,
             NULL, NULL, NULL, NULL,
             NULL, NULL, NULL, NULL,
         },
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index cc5a26f35b..8d599bb5b8 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -973,6 +973,7 @@ typedef uint64_t FeatureWordArray[FEATURE_WORDS];
 #define VMX_VM_EXIT_CLEAR_BNDCFGS                   0x00800000
 #define VMX_VM_EXIT_PT_CONCEAL_PIP                  0x01000000
 #define VMX_VM_EXIT_CLEAR_IA32_RTIT_CTL             0x02000000
+#define VMX_VM_EXIT_LOAD_IA32_PKRS                  0x20000000
 
 #define VMX_VM_ENTRY_LOAD_DEBUG_CONTROLS            0x00000004
 #define VMX_VM_ENTRY_IA32E_MODE                     0x00000200
@@ -984,6 +985,7 @@ typedef uint64_t FeatureWordArray[FEATURE_WORDS];
 #define VMX_VM_ENTRY_LOAD_BNDCFGS                   0x00010000
 #define VMX_VM_ENTRY_PT_CONCEAL_PIP                 0x00020000
 #define VMX_VM_ENTRY_LOAD_IA32_RTIT_CTL             0x00040000
+#define VMX_VM_ENTRY_LOAD_IA32_PKRS                 0x00400000
 
 /* Supported Hyper-V Enlightenments */
 #define HYPERV_FEAT_RELAXED             0
-- 
2.29.2

Re: [PULL 00/46] Misc patches for 2021-02-08

[Peter Maydell]

On Mon, 8 Feb 2021 at 22:50, Paolo Bonzini <pbonzini@redhat.com> wrote:
>
> The following changes since commit 6f0e9c26dbae9ac18b89d359791008fe3432ca91:
>
>   Merge remote-tracking branch 'remotes/dg-gitlab/tags/cgs-pull-request' into staging (2021-02-08 11:11:26 +0000)
>
> are available in the Git repository at:
>
>   https://gitlab.com/bonzini/qemu.git tags/for-upstream
>
> for you to fetch changes up to 52a44ad2b92ba4cd81c2b271cd5e4a2d820e91fc:
>
>   target/i386: Expose VMX entry/exit load pkrs control bits (2021-02-08 15:15:32 +0100)
>
> ----------------------------------------------------------------
> * Fuzzing improvements (Qiuhao, Alexander)
> * i386: Fix BMI decoding for instructions with the 0x66 prefix (David)
> * initial attempt at fixing event_notifier emulation (Maxim)
> * i386: PKS emulation, fix for "qemu-system-i386 -cpu host" (myself)
> * meson: RBD test fixes (myself)
> * meson: TCI warnings (Philippe)
> * Leaner build for --disable-guest-agent, --disable-system and
>   --disable-tools (Philippe, Stefan)
> * --enable-tcg-interpreter fix (Richard)
> * i386: SVM feature bits (Wei)
> * KVM bugfix (Thomas H.)
> * Add missing MemoryRegionOps callbacks (PJP)


Applied, thanks.

Please update the changelog at https://wiki.qemu.org/ChangeLog/6.0
for any user-visible changes.

-- PMM

Re: [PULL 21/46] meson: Warn when TCI is selected but TCG backend is available

[Peter Maydell]

On Mon, 8 Feb 2021 at 23:09, Paolo Bonzini <pbonzini@redhat.com> wrote:
>
> From: Philippe Mathieu-Daudé <philmd@redhat.com>
>
> Some new users get confused with 'TCG' and 'TCI', and enable TCI
> support expecting to enable TCG.
>
> Emit a warning when native TCG backend is available on the
> host architecture, mentioning this is a suboptimal configuration.
>
> Reviewed-by: Thomas Huth <thuth@redhat.com>
> Suggested-by: Daniel Berrangé <berrange@redhat.com>
> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
> Message-Id: <20210125144530.2837481-5-philmd@redhat.com>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
>  meson.build | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/meson.build b/meson.build
> index 3a13ba3307..4cc3ebb827 100644
> --- a/meson.build
> +++ b/meson.build
> @@ -231,6 +231,13 @@ if not get_option('tcg').disabled()
>      else
>        error('Unsupported CPU @0@, try --enable-tcg-interpreter'.format(cpu))
>      endif
> +  elif get_option('tcg_interpreter')
> +    warning('Use of the TCG interpretor is not recommended on this host')
> +    warning('architecture. There is a native TCG execution backend available')
> +    warning('which provides substantially better performance and reliability.')
> +    warning('It is strongly recommended to remove the --enable-tcg-interpreter')
> +    warning('configuration option on this architecture to use the native')
> +    warning('backend.')
>    endif
>    if get_option('tcg_interpreter')

Just noticed this one after it hit master, but there's a typo here:
"TCG interpretor" should be "interpreter".

thanks
-- PMM