* [PATCH v2 0/9] KVM/ARM: Some vgic fixes and init sequence KVM selftests
@ 2021-01-14 10:36 Eric Auger
2021-01-14 10:37 ` [PATCH v2 1/9] KVM: arm64: vgic-v3: Fix some error codes when setting RDIST base Eric Auger
` (8 more replies)
0 siblings, 9 replies; 10+ messages in thread
From: Eric Auger @ 2021-01-14 10:36 UTC (permalink / raw)
To: eric.auger.pro, eric.auger, linux-kernel, kvm, kvmarm, maz, drjones
Cc: alexandru.elisei, james.morse, julien.thierry.kdev,
suzuki.poulose, shuah, pbonzini
While writting vgic v3 init sequence KVM selftests I noticed some
relatively minor issues. This was also the opportunity to try to
fix the issue laterly reported by Zenghui, related to the RDIST_TYPER
last bit emulation. The final patch is a first batch of VGIC init
sequence selftests. Of course they can be augmented with a lot more
register access tests, but let's try to move forward incrementally ...
Best Regards
Eric
This series can be found at:
https://github.com/eauger/linux/tree/vgic_kvmselftests_v2
History:
- Took into account all comments from Marc and Alexandru's except
the has_run_once still after the map_resources (this would oblige
me to revisit in depth the selftests)
Eric Auger (9):
KVM: arm64: vgic-v3: Fix some error codes when setting RDIST base
KVM: arm64: Fix KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION read
KVM: arm64: vgic-v3: Fix error handling in vgic_v3_set_redist_base()
KVM: arm/arm64: vgic: Reset base address on kvm_vgic_dist_destroy()
KVM: arm: move has_run_once after the map_resources
docs: kvm: devices/arm-vgic-v3: enhance KVM_DEV_ARM_VGIC_CTRL_INIT doc
KVM: arm64: Simplify argument passing to vgic_uaccess_[read|write]
KVM: arm64: vgic-v3: Expose GICR_TYPER.Last for userspace
KVM: selftests: aarch64/vgic-v3 init sequence tests
.../virt/kvm/devices/arm-vgic-v3.rst | 2 +-
arch/arm64/kvm/arm.c | 4 +-
arch/arm64/kvm/vgic/vgic-init.c | 6 +-
arch/arm64/kvm/vgic/vgic-kvm-device.c | 3 +
arch/arm64/kvm/vgic/vgic-mmio-v3.c | 30 +-
arch/arm64/kvm/vgic/vgic-mmio.c | 10 +-
include/kvm/arm_vgic.h | 1 +
tools/testing/selftests/kvm/Makefile | 1 +
.../testing/selftests/kvm/aarch64/vgic_init.c | 453 ++++++++++++++++++
.../testing/selftests/kvm/include/kvm_util.h | 5 +
tools/testing/selftests/kvm/lib/kvm_util.c | 51 ++
11 files changed, 546 insertions(+), 20 deletions(-)
create mode 100644 tools/testing/selftests/kvm/aarch64/vgic_init.c
--
2.21.3
^ permalink raw reply [flat|nested] 10+ messages in thread
* [PATCH v2 1/9] KVM: arm64: vgic-v3: Fix some error codes when setting RDIST base
2021-01-14 10:36 [PATCH v2 0/9] KVM/ARM: Some vgic fixes and init sequence KVM selftests Eric Auger
@ 2021-01-14 10:37 ` Eric Auger
2021-01-14 10:37 ` [PATCH v2 2/9] KVM: arm64: Fix KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION read Eric Auger
` (7 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: Eric Auger @ 2021-01-14 10:37 UTC (permalink / raw)
To: eric.auger.pro, eric.auger, linux-kernel, kvm, kvmarm, maz, drjones
Cc: alexandru.elisei, james.morse, julien.thierry.kdev,
suzuki.poulose, shuah, pbonzini
KVM_DEV_ARM_VGIC_GRP_ADDR group doc says we should return
-EEXIST in case the base address of the redist is already set.
We currently return -EINVAL.
However we need to return -EINVAL in case a legacy REDIST address
is attempted to be set while REDIST_REGIONS were set. This case
is discriminated by looking at the count field.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
v1 -> v2:
- simplify the check sequence
---
arch/arm64/kvm/vgic/vgic-mmio-v3.c | 15 +++++++--------
1 file changed, 7 insertions(+), 8 deletions(-)
diff --git a/arch/arm64/kvm/vgic/vgic-mmio-v3.c b/arch/arm64/kvm/vgic/vgic-mmio-v3.c
index 15a6c98ee92f..013b737b658f 100644
--- a/arch/arm64/kvm/vgic/vgic-mmio-v3.c
+++ b/arch/arm64/kvm/vgic/vgic-mmio-v3.c
@@ -791,10 +791,6 @@ static int vgic_v3_insert_redist_region(struct kvm *kvm, uint32_t index,
size_t size = count * KVM_VGIC_V3_REDIST_SIZE;
int ret;
- /* single rdist region already set ?*/
- if (!count && !list_empty(rd_regions))
- return -EINVAL;
-
/* cross the end of memory ? */
if (base + size < base)
return -EINVAL;
@@ -805,11 +801,14 @@ static int vgic_v3_insert_redist_region(struct kvm *kvm, uint32_t index,
} else {
rdreg = list_last_entry(rd_regions,
struct vgic_redist_region, list);
- if (index != rdreg->index + 1)
- return -EINVAL;
- /* Cannot add an explicitly sized regions after legacy region */
- if (!rdreg->count)
+ if ((!count) != (!rdreg->count))
+ return -EINVAL; /* Mix REDIST and REDIST_REGION */
+
+ if (!count)
+ return -EEXIST;
+
+ if (index != rdreg->index + 1)
return -EINVAL;
}
--
2.21.3
^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH v2 2/9] KVM: arm64: Fix KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION read
2021-01-14 10:36 [PATCH v2 0/9] KVM/ARM: Some vgic fixes and init sequence KVM selftests Eric Auger
2021-01-14 10:37 ` [PATCH v2 1/9] KVM: arm64: vgic-v3: Fix some error codes when setting RDIST base Eric Auger
@ 2021-01-14 10:37 ` Eric Auger
2021-01-14 10:37 ` [PATCH v2 3/9] KVM: arm64: vgic-v3: Fix error handling in vgic_v3_set_redist_base() Eric Auger
` (6 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: Eric Auger @ 2021-01-14 10:37 UTC (permalink / raw)
To: eric.auger.pro, eric.auger, linux-kernel, kvm, kvmarm, maz, drjones
Cc: alexandru.elisei, james.morse, julien.thierry.kdev,
suzuki.poulose, shuah, pbonzini
The doc says:
"The characteristics of a specific redistributor region can
be read by presetting the index field in the attr data.
Only valid for KVM_DEV_TYPE_ARM_VGIC_V3"
Unfortunately the existing code fails to read the input attr data.
Fixes: 04c110932225 ("KVM: arm/arm64: Implement KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION")
Cc: stable@vger.kernel.org#v4.17+
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com>
---
v1 -> v2:
- in the commit message, remove the statement that the index always is 0
- add Alexandru's R-b
---
arch/arm64/kvm/vgic/vgic-kvm-device.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/arm64/kvm/vgic/vgic-kvm-device.c b/arch/arm64/kvm/vgic/vgic-kvm-device.c
index 44419679f91a..2f66cf247282 100644
--- a/arch/arm64/kvm/vgic/vgic-kvm-device.c
+++ b/arch/arm64/kvm/vgic/vgic-kvm-device.c
@@ -226,6 +226,9 @@ static int vgic_get_common_attr(struct kvm_device *dev,
u64 addr;
unsigned long type = (unsigned long)attr->attr;
+ if (copy_from_user(&addr, uaddr, sizeof(addr)))
+ return -EFAULT;
+
r = kvm_vgic_addr(dev->kvm, type, &addr, false);
if (r)
return (r == -ENODEV) ? -ENXIO : r;
--
2.21.3
^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH v2 3/9] KVM: arm64: vgic-v3: Fix error handling in vgic_v3_set_redist_base()
2021-01-14 10:36 [PATCH v2 0/9] KVM/ARM: Some vgic fixes and init sequence KVM selftests Eric Auger
2021-01-14 10:37 ` [PATCH v2 1/9] KVM: arm64: vgic-v3: Fix some error codes when setting RDIST base Eric Auger
2021-01-14 10:37 ` [PATCH v2 2/9] KVM: arm64: Fix KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION read Eric Auger
@ 2021-01-14 10:37 ` Eric Auger
2021-01-14 10:37 ` [PATCH v2 4/9] KVM: arm/arm64: vgic: Reset base address on kvm_vgic_dist_destroy() Eric Auger
` (5 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: Eric Auger @ 2021-01-14 10:37 UTC (permalink / raw)
To: eric.auger.pro, eric.auger, linux-kernel, kvm, kvmarm, maz, drjones
Cc: alexandru.elisei, james.morse, julien.thierry.kdev,
suzuki.poulose, shuah, pbonzini
vgic_v3_insert_redist_region() may succeed while
vgic_register_all_redist_iodevs fails. For example this happens
while adding a redistributor region overlapping a dist region. The
failure only is detected on vgic_register_all_redist_iodevs when
vgic_v3_check_base() gets called in vgic_register_redist_iodev().
In such a case, remove the newly added redistributor region and free
it.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
v1 -> v2:
- fix the commit message and split declaration/assignment of rdreg
---
arch/arm64/kvm/vgic/vgic-mmio-v3.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/kvm/vgic/vgic-mmio-v3.c b/arch/arm64/kvm/vgic/vgic-mmio-v3.c
index 013b737b658f..987e366c8000 100644
--- a/arch/arm64/kvm/vgic/vgic-mmio-v3.c
+++ b/arch/arm64/kvm/vgic/vgic-mmio-v3.c
@@ -860,8 +860,14 @@ int vgic_v3_set_redist_base(struct kvm *kvm, u32 index, u64 addr, u32 count)
* afterwards will register the iodevs when needed.
*/
ret = vgic_register_all_redist_iodevs(kvm);
- if (ret)
+ if (ret) {
+ struct vgic_redist_region *rdreg;
+
+ rdreg = vgic_v3_rdist_region_from_index(kvm, index);
+ list_del(&rdreg->list);
+ kfree(rdreg);
return ret;
+ }
return 0;
}
--
2.21.3
^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH v2 4/9] KVM: arm/arm64: vgic: Reset base address on kvm_vgic_dist_destroy()
2021-01-14 10:36 [PATCH v2 0/9] KVM/ARM: Some vgic fixes and init sequence KVM selftests Eric Auger
` (2 preceding siblings ...)
2021-01-14 10:37 ` [PATCH v2 3/9] KVM: arm64: vgic-v3: Fix error handling in vgic_v3_set_redist_base() Eric Auger
@ 2021-01-14 10:37 ` Eric Auger
2021-01-14 10:37 ` [PATCH v2 5/9] KVM: arm: move has_run_once after the map_resources Eric Auger
` (4 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: Eric Auger @ 2021-01-14 10:37 UTC (permalink / raw)
To: eric.auger.pro, eric.auger, linux-kernel, kvm, kvmarm, maz, drjones
Cc: alexandru.elisei, james.morse, julien.thierry.kdev,
suzuki.poulose, shuah, pbonzini
On vgic_dist_destroy(), the addresses are not reset. However for
kvm selftest purpose this would allow to continue the test execution
even after a failure when running KVM_RUN. So let's reset the
base addresses.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
v1 -> v2:
- use dist-> in the else and add braces
---
arch/arm64/kvm/vgic/vgic-init.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/kvm/vgic/vgic-init.c b/arch/arm64/kvm/vgic/vgic-init.c
index 052917deb149..cf6faa0aeddb 100644
--- a/arch/arm64/kvm/vgic/vgic-init.c
+++ b/arch/arm64/kvm/vgic/vgic-init.c
@@ -335,13 +335,16 @@ static void kvm_vgic_dist_destroy(struct kvm *kvm)
kfree(dist->spis);
dist->spis = NULL;
dist->nr_spis = 0;
+ dist->vgic_dist_base = VGIC_ADDR_UNDEF;
- if (kvm->arch.vgic.vgic_model == KVM_DEV_TYPE_ARM_VGIC_V3) {
+ if (dist->vgic_model == KVM_DEV_TYPE_ARM_VGIC_V3) {
list_for_each_entry_safe(rdreg, next, &dist->rd_regions, list) {
list_del(&rdreg->list);
kfree(rdreg);
}
INIT_LIST_HEAD(&dist->rd_regions);
+ } else {
+ dist->vgic_cpu_base = VGIC_ADDR_UNDEF;
}
if (vgic_has_its(kvm))
@@ -362,6 +365,7 @@ void kvm_vgic_vcpu_destroy(struct kvm_vcpu *vcpu)
vgic_flush_pending_lpis(vcpu);
INIT_LIST_HEAD(&vgic_cpu->ap_list_head);
+ vgic_cpu->rd_iodev.base_addr = VGIC_ADDR_UNDEF;
}
/* To be called with kvm->lock held */
--
2.21.3
^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH v2 5/9] KVM: arm: move has_run_once after the map_resources
2021-01-14 10:36 [PATCH v2 0/9] KVM/ARM: Some vgic fixes and init sequence KVM selftests Eric Auger
` (3 preceding siblings ...)
2021-01-14 10:37 ` [PATCH v2 4/9] KVM: arm/arm64: vgic: Reset base address on kvm_vgic_dist_destroy() Eric Auger
@ 2021-01-14 10:37 ` Eric Auger
2021-01-14 10:37 ` [PATCH v2 6/9] docs: kvm: devices/arm-vgic-v3: enhance KVM_DEV_ARM_VGIC_CTRL_INIT doc Eric Auger
` (3 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: Eric Auger @ 2021-01-14 10:37 UTC (permalink / raw)
To: eric.auger.pro, eric.auger, linux-kernel, kvm, kvmarm, maz, drjones
Cc: alexandru.elisei, james.morse, julien.thierry.kdev,
suzuki.poulose, shuah, pbonzini
has_run_once is set to true at the beginning of
kvm_vcpu_first_run_init(). This generally is not an issue
except when exercising the code with KVM selftests. for instance,
if kvm_vgic_map_resources() fails due to erroneous user settings,
has_run_once is set and this prevents from continuing
executing the test. This patch moves the assignment after the
kvm_vgic_map_resources().
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
v1 -> v2:
- slight reword of the commit msg (for instance)
---
arch/arm64/kvm/arm.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 04c44853b103..580760e58980 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -573,8 +573,6 @@ static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu)
if (!kvm_arm_vcpu_is_finalized(vcpu))
return -EPERM;
- vcpu->arch.has_run_once = true;
-
if (likely(irqchip_in_kernel(kvm))) {
/*
* Map the VGIC hardware resources before running a vcpu the
@@ -591,6 +589,8 @@ static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu)
static_branch_inc(&userspace_irqchip_in_use);
}
+ vcpu->arch.has_run_once = true;
+
ret = kvm_timer_enable(vcpu);
if (ret)
return ret;
--
2.21.3
^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH v2 6/9] docs: kvm: devices/arm-vgic-v3: enhance KVM_DEV_ARM_VGIC_CTRL_INIT doc
2021-01-14 10:36 [PATCH v2 0/9] KVM/ARM: Some vgic fixes and init sequence KVM selftests Eric Auger
` (4 preceding siblings ...)
2021-01-14 10:37 ` [PATCH v2 5/9] KVM: arm: move has_run_once after the map_resources Eric Auger
@ 2021-01-14 10:37 ` Eric Auger
2021-01-14 10:37 ` [PATCH v2 7/9] KVM: arm64: Simplify argument passing to vgic_uaccess_[read|write] Eric Auger
` (2 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: Eric Auger @ 2021-01-14 10:37 UTC (permalink / raw)
To: eric.auger.pro, eric.auger, linux-kernel, kvm, kvmarm, maz, drjones
Cc: alexandru.elisei, james.morse, julien.thierry.kdev,
suzuki.poulose, shuah, pbonzini
kvm_arch_vcpu_precreate() returns -EBUSY if the vgic is
already initialized. So let's document that KVM_DEV_ARM_VGIC_CTRL_INIT
must be called after all vcpu creations.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
v1 -> v2:
- Must be called after all vcpu creations ->
Must be called after all VCPUs have been created as per
Alexandru's suggestion
---
Documentation/virt/kvm/devices/arm-vgic-v3.rst | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/Documentation/virt/kvm/devices/arm-vgic-v3.rst b/Documentation/virt/kvm/devices/arm-vgic-v3.rst
index 5dd3bff51978..51e5e5762571 100644
--- a/Documentation/virt/kvm/devices/arm-vgic-v3.rst
+++ b/Documentation/virt/kvm/devices/arm-vgic-v3.rst
@@ -228,7 +228,7 @@ Groups:
KVM_DEV_ARM_VGIC_CTRL_INIT
request the initialization of the VGIC, no additional parameter in
- kvm_device_attr.addr.
+ kvm_device_attr.addr. Must be called after all VCPUs have been created.
KVM_DEV_ARM_VGIC_SAVE_PENDING_TABLES
save all LPI pending bits into guest RAM pending tables.
--
2.21.3
^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH v2 7/9] KVM: arm64: Simplify argument passing to vgic_uaccess_[read|write]
2021-01-14 10:36 [PATCH v2 0/9] KVM/ARM: Some vgic fixes and init sequence KVM selftests Eric Auger
` (5 preceding siblings ...)
2021-01-14 10:37 ` [PATCH v2 6/9] docs: kvm: devices/arm-vgic-v3: enhance KVM_DEV_ARM_VGIC_CTRL_INIT doc Eric Auger
@ 2021-01-14 10:37 ` Eric Auger
2021-01-14 10:37 ` [PATCH v2 8/9] KVM: arm64: vgic-v3: Expose GICR_TYPER.Last for userspace Eric Auger
2021-01-14 10:37 ` [PATCH v2 9/9] KVM: selftests: aarch64/vgic-v3 init sequence tests Eric Auger
8 siblings, 0 replies; 10+ messages in thread
From: Eric Auger @ 2021-01-14 10:37 UTC (permalink / raw)
To: eric.auger.pro, eric.auger, linux-kernel, kvm, kvmarm, maz, drjones
Cc: alexandru.elisei, james.morse, julien.thierry.kdev,
suzuki.poulose, shuah, pbonzini
vgic_uaccess() takes a struct vgic_io_device argument, converts it
to a struct kvm_io_device and passes it to the read/write accessor
functions, which convert it back to a struct vgic_io_device.
Avoid the indirection by passing the struct vgic_io_device argument
directly to vgic_uaccess_{read,write}.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
v1 -> v2:
- reworded the commit message as suggested by Alexandru
---
arch/arm64/kvm/vgic/vgic-mmio.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)
diff --git a/arch/arm64/kvm/vgic/vgic-mmio.c b/arch/arm64/kvm/vgic/vgic-mmio.c
index b2d73fc0d1ef..48c6067fc5ec 100644
--- a/arch/arm64/kvm/vgic/vgic-mmio.c
+++ b/arch/arm64/kvm/vgic/vgic-mmio.c
@@ -938,10 +938,9 @@ vgic_get_mmio_region(struct kvm_vcpu *vcpu, struct vgic_io_device *iodev,
return region;
}
-static int vgic_uaccess_read(struct kvm_vcpu *vcpu, struct kvm_io_device *dev,
+static int vgic_uaccess_read(struct kvm_vcpu *vcpu, struct vgic_io_device *iodev,
gpa_t addr, u32 *val)
{
- struct vgic_io_device *iodev = kvm_to_vgic_iodev(dev);
const struct vgic_register_region *region;
struct kvm_vcpu *r_vcpu;
@@ -960,10 +959,9 @@ static int vgic_uaccess_read(struct kvm_vcpu *vcpu, struct kvm_io_device *dev,
return 0;
}
-static int vgic_uaccess_write(struct kvm_vcpu *vcpu, struct kvm_io_device *dev,
+static int vgic_uaccess_write(struct kvm_vcpu *vcpu, struct vgic_io_device *iodev,
gpa_t addr, const u32 *val)
{
- struct vgic_io_device *iodev = kvm_to_vgic_iodev(dev);
const struct vgic_register_region *region;
struct kvm_vcpu *r_vcpu;
@@ -986,9 +984,9 @@ int vgic_uaccess(struct kvm_vcpu *vcpu, struct vgic_io_device *dev,
bool is_write, int offset, u32 *val)
{
if (is_write)
- return vgic_uaccess_write(vcpu, &dev->dev, offset, val);
+ return vgic_uaccess_write(vcpu, dev, offset, val);
else
- return vgic_uaccess_read(vcpu, &dev->dev, offset, val);
+ return vgic_uaccess_read(vcpu, dev, offset, val);
}
static int dispatch_mmio_read(struct kvm_vcpu *vcpu, struct kvm_io_device *dev,
--
2.21.3
^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH v2 8/9] KVM: arm64: vgic-v3: Expose GICR_TYPER.Last for userspace
2021-01-14 10:36 [PATCH v2 0/9] KVM/ARM: Some vgic fixes and init sequence KVM selftests Eric Auger
` (6 preceding siblings ...)
2021-01-14 10:37 ` [PATCH v2 7/9] KVM: arm64: Simplify argument passing to vgic_uaccess_[read|write] Eric Auger
@ 2021-01-14 10:37 ` Eric Auger
2021-01-14 10:37 ` [PATCH v2 9/9] KVM: selftests: aarch64/vgic-v3 init sequence tests Eric Auger
8 siblings, 0 replies; 10+ messages in thread
From: Eric Auger @ 2021-01-14 10:37 UTC (permalink / raw)
To: eric.auger.pro, eric.auger, linux-kernel, kvm, kvmarm, maz, drjones
Cc: alexandru.elisei, james.morse, julien.thierry.kdev,
suzuki.poulose, shuah, pbonzini
Commit 23bde34771f1 ("KVM: arm64: vgic-v3: Drop the
reporting of GICR_TYPER.Last for userspace") temporarily fixed
a bug identified when attempting to access the GICR_TYPER
register before the redistributor region setting but dropped
the support of the LAST bit. Emulating the GICR_TYPER.Last bit
still makes sense for architecture compliance.
This patch restores its support (if the redistributor region
was set) while keeping the code safe.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
arch/arm64/kvm/vgic/vgic-mmio-v3.c | 7 ++++++-
include/kvm/arm_vgic.h | 1 +
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/kvm/vgic/vgic-mmio-v3.c b/arch/arm64/kvm/vgic/vgic-mmio-v3.c
index 987e366c8000..7ff23c153128 100644
--- a/arch/arm64/kvm/vgic/vgic-mmio-v3.c
+++ b/arch/arm64/kvm/vgic/vgic-mmio-v3.c
@@ -277,6 +277,8 @@ static unsigned long vgic_uaccess_read_v3r_typer(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len)
{
unsigned long mpidr = kvm_vcpu_get_mpidr_aff(vcpu);
+ struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu;
+ struct vgic_redist_region *rdreg = vgic_cpu->rdreg;
int target_vcpu_id = vcpu->vcpu_id;
u64 value;
@@ -286,7 +288,9 @@ static unsigned long vgic_uaccess_read_v3r_typer(struct kvm_vcpu *vcpu,
if (vgic_has_its(vcpu->kvm))
value |= GICR_TYPER_PLPIS;
- /* reporting of the Last bit is not supported for userspace */
+ if (rdreg && (vgic_cpu->rdreg_index == (rdreg->free_index - 1)))
+ value |= GICR_TYPER_LAST;
+
return extract_bytes(value, addr & 7, len);
}
@@ -714,6 +718,7 @@ int vgic_register_redist_iodev(struct kvm_vcpu *vcpu)
return -EINVAL;
vgic_cpu->rdreg = rdreg;
+ vgic_cpu->rdreg_index = rdreg->free_index;
rd_base = rdreg->base + rdreg->free_index * KVM_VGIC_V3_REDIST_SIZE;
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
index 3d74f1060bd1..ec621180ef09 100644
--- a/include/kvm/arm_vgic.h
+++ b/include/kvm/arm_vgic.h
@@ -322,6 +322,7 @@ struct vgic_cpu {
*/
struct vgic_io_device rd_iodev;
struct vgic_redist_region *rdreg;
+ u32 rdreg_index;
/* Contains the attributes and gpa of the LPI pending tables. */
u64 pendbaser;
--
2.21.3
^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH v2 9/9] KVM: selftests: aarch64/vgic-v3 init sequence tests
2021-01-14 10:36 [PATCH v2 0/9] KVM/ARM: Some vgic fixes and init sequence KVM selftests Eric Auger
` (7 preceding siblings ...)
2021-01-14 10:37 ` [PATCH v2 8/9] KVM: arm64: vgic-v3: Expose GICR_TYPER.Last for userspace Eric Auger
@ 2021-01-14 10:37 ` Eric Auger
8 siblings, 0 replies; 10+ messages in thread
From: Eric Auger @ 2021-01-14 10:37 UTC (permalink / raw)
To: eric.auger.pro, eric.auger, linux-kernel, kvm, kvmarm, maz, drjones
Cc: alexandru.elisei, james.morse, julien.thierry.kdev,
suzuki.poulose, shuah, pbonzini
The tests exercise the VGIC_V3 device creation including the
associated KVM_DEV_ARM_VGIC_GRP_ADDR group attributes:
- KVM_VGIC_V3_ADDR_TYPE_DIST/REDIST (vcpu_first and vgic_first)
- KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION (redist_regions).
Another test dedicates to KVM_DEV_ARM_VGIC_GRP_REDIST_REGS group
and especially the GICR_TYPER read. The goal was to test the case
recently fixed by commit 23bde34771f1
("KVM: arm64: vgic-v3: Drop the reporting of GICR_TYPER.Last for userspace").
The API under test can be found at
Documentation/virt/kvm/devices/arm-vgic-v3.rst
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
tools/testing/selftests/kvm/Makefile | 1 +
.../testing/selftests/kvm/aarch64/vgic_init.c | 453 ++++++++++++++++++
.../testing/selftests/kvm/include/kvm_util.h | 5 +
tools/testing/selftests/kvm/lib/kvm_util.c | 51 ++
4 files changed, 510 insertions(+)
create mode 100644 tools/testing/selftests/kvm/aarch64/vgic_init.c
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index fe41c6a0fa67..c3c2cb6fe8a1 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -68,6 +68,7 @@ TEST_GEN_PROGS_x86_64 += steal_time
TEST_GEN_PROGS_aarch64 += aarch64/get-reg-list
TEST_GEN_PROGS_aarch64 += aarch64/get-reg-list-sve
+TEST_GEN_PROGS_aarch64 += aarch64/vgic_init
TEST_GEN_PROGS_aarch64 += demand_paging_test
TEST_GEN_PROGS_aarch64 += dirty_log_test
TEST_GEN_PROGS_aarch64 += dirty_log_perf_test
diff --git a/tools/testing/selftests/kvm/aarch64/vgic_init.c b/tools/testing/selftests/kvm/aarch64/vgic_init.c
new file mode 100644
index 000000000000..e8caa64c0395
--- /dev/null
+++ b/tools/testing/selftests/kvm/aarch64/vgic_init.c
@@ -0,0 +1,453 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * vgic init sequence tests
+ *
+ * Copyright (C) 2020, Red Hat, Inc.
+ */
+#define _GNU_SOURCE
+#include <linux/kernel.h>
+#include <sys/syscall.h>
+#include <asm/kvm.h>
+#include <asm/kvm_para.h>
+
+#include "test_util.h"
+#include "kvm_util.h"
+#include "processor.h"
+
+#define NR_VCPUS 4
+
+#define REDIST_REGION_ATTR_ADDR(count, base, flags, index) (((uint64_t)(count) << 52) | \
+ ((uint64_t)((base) >> 16) << 16) | ((uint64_t)(flags) << 12) | index)
+#define REG_OFFSET(vcpu, offset) (((uint64_t)vcpu << 32) | offset)
+
+#define GICR_TYPER 0x8
+
+static int access_redist_reg(int gicv3_fd, int vcpu, int offset,
+ uint32_t *val, bool write)
+{
+ uint64_t attr = REG_OFFSET(vcpu, offset);
+
+ return kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_REDIST_REGS,
+ attr, val, write);
+}
+
+static void guest_code(int cpu)
+{
+ GUEST_SYNC(0);
+ GUEST_SYNC(1);
+ GUEST_SYNC(2);
+ GUEST_DONE();
+}
+
+static int run_vcpu(struct kvm_vm *vm, uint32_t vcpuid)
+{
+ static int run;
+ struct ucall uc;
+ int ret;
+
+ vcpu_args_set(vm, vcpuid, 1, vcpuid);
+ ret = _vcpu_ioctl(vm, vcpuid, KVM_RUN, NULL);
+ get_ucall(vm, vcpuid, &uc);
+ run++;
+
+ if (ret)
+ return -errno;
+ return 0;
+}
+
+int dist_rdist_tests(struct kvm_vm *vm)
+{
+ int ret, gicv3_fd, max_ipa_bits;
+ uint64_t addr;
+
+ max_ipa_bits = kvm_check_cap(KVM_CAP_ARM_VM_IPA_SIZE);
+
+ ret = kvm_create_device(vm, KVM_DEV_TYPE_ARM_VGIC_V3, true);
+ if (ret) {
+ print_skip("GICv3 not supported");
+ exit(KSFT_SKIP);
+ }
+
+ ret = kvm_create_device(vm, 0, true);
+ TEST_ASSERT(ret == -ENODEV, "unsupported device");
+
+ /* Create the device */
+
+ gicv3_fd = kvm_create_device(vm, KVM_DEV_TYPE_ARM_VGIC_V3, false);
+ TEST_ASSERT(gicv3_fd > 0, "GICv3 device created");
+
+ /* Check attributes */
+
+ ret = kvm_device_check_attr(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_DIST);
+ TEST_ASSERT(!ret, "KVM_DEV_ARM_VGIC_GRP_ADDR/KVM_VGIC_V3_ADDR_TYPE_DIST supported");
+
+ ret = kvm_device_check_attr(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST);
+ TEST_ASSERT(!ret, "KVM_DEV_ARM_VGIC_GRP_ADDR/KVM_VGIC_V3_ADDR_TYPE_REDIST supported");
+
+ ret = kvm_device_check_attr(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, 0);
+ TEST_ASSERT(ret == -ENXIO, "attribute not supported");
+
+ /* misaligned DIST and REDIST addresses */
+
+ addr = 0x1000;
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_DIST, &addr, true);
+ TEST_ASSERT(ret == -EINVAL, "GICv3 dist base not 64kB aligned");
+
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST, &addr, true);
+ TEST_ASSERT(ret == -EINVAL, "GICv3 redist base not 64kB aligned");
+
+ /* out of range address */
+ if (max_ipa_bits) {
+ addr = 1ULL << max_ipa_bits;
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_DIST, &addr, true);
+ TEST_ASSERT(ret == -E2BIG, "dist address beyond IPA limit");
+
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST, &addr, true);
+ TEST_ASSERT(ret == -E2BIG, "redist address beyond IPA limit");
+ }
+
+ /* set REDIST base address */
+ addr = 0x00000;
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST, &addr, true);
+ TEST_ASSERT(!ret, "GICv3 redist base set");
+
+ addr = 0xE0000;
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST, &addr, true);
+ TEST_ASSERT(ret == -EEXIST, "GICv3 redist base set again");
+
+ addr = REDIST_REGION_ATTR_ADDR(NR_VCPUS, 0x100000, 0, 0);
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
+ TEST_ASSERT(ret == -EINVAL, "attempt to mix GICv3 REDIST and REDIST_REGION");
+
+ /*
+ * Set overlapping DIST / REDIST, cannot be detected here. Will be detected
+ * on first vcpu run instead.
+ */
+ addr = 3 * 2 * 0x10000;
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, KVM_VGIC_V3_ADDR_TYPE_DIST,
+ &addr, true);
+ TEST_ASSERT(!ret, "dist overlapping rdist");
+
+ ret = kvm_create_device(vm, KVM_DEV_TYPE_ARM_VGIC_V3, false);
+ TEST_ASSERT(ret == -EEXIST, "create GICv3 device twice");
+
+ ret = kvm_create_device(vm, KVM_DEV_TYPE_ARM_VGIC_V3, true);
+ TEST_ASSERT(!ret, "create GICv3 in test mode while the same already is created");
+
+ if (!kvm_create_device(vm, KVM_DEV_TYPE_ARM_VGIC_V2, true)) {
+ ret = kvm_create_device(vm, KVM_DEV_TYPE_ARM_VGIC_V2, true);
+ TEST_ASSERT(ret == -EINVAL, "create GICv2 while v3 exists");
+ }
+
+ return gicv3_fd;
+}
+
+static int redist_region_tests(struct kvm_vm *vm, int gicv3_fd)
+{
+ int ret, max_ipa_bits;
+ uint64_t addr, expected_addr;
+
+ max_ipa_bits = kvm_check_cap(KVM_CAP_ARM_VM_IPA_SIZE);
+
+ ret = kvm_create_device(vm, KVM_DEV_TYPE_ARM_VGIC_V3, true);
+ if (ret) {
+ print_skip("GICv3 not supported");
+ exit(KSFT_SKIP);
+ }
+
+ if (gicv3_fd < 0) {
+ gicv3_fd = kvm_create_device(vm, KVM_DEV_TYPE_ARM_VGIC_V3, false);
+ TEST_ASSERT(gicv3_fd >= 0, "VGIC_V3 device created");
+ }
+
+ ret = kvm_device_check_attr(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST);
+ TEST_ASSERT(!ret, "Multiple redist regions advertised");
+
+ addr = REDIST_REGION_ATTR_ADDR(NR_VCPUS, 0x100000, 2, 0);
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
+ TEST_ASSERT(ret == -EINVAL, "redist region attr value with flags != 0");
+
+ addr = REDIST_REGION_ATTR_ADDR(0, 0x100000, 0, 0);
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
+ TEST_ASSERT(ret == -EINVAL, "redist region attr value with count== 0");
+
+ addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 0, 1);
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
+ TEST_ASSERT(ret == -EINVAL, "attempt to register the first rdist region with index != 0");
+
+ addr = REDIST_REGION_ATTR_ADDR(2, 0x201000, 0, 1);
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
+ TEST_ASSERT(ret == -EINVAL, "rdist region with misaligned address");
+
+ addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 0, 0);
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
+ TEST_ASSERT(!ret, "First valid redist region with 2 rdist @ 0x200000, index 0");
+
+ addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 0, 1);
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
+ TEST_ASSERT(ret == -EINVAL, "register an rdist region with already used index");
+
+ addr = REDIST_REGION_ATTR_ADDR(1, 0x210000, 0, 2);
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
+ TEST_ASSERT(ret == -EINVAL, "register an rdist region overlapping with another one");
+
+ addr = REDIST_REGION_ATTR_ADDR(1, 0x240000, 0, 2);
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
+ TEST_ASSERT(ret == -EINVAL, "register redist region with index not +1");
+
+ addr = REDIST_REGION_ATTR_ADDR(1, 0x240000, 0, 1);
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
+ TEST_ASSERT(!ret, "register valid redist region with 1 rdist @ 0x220000, index 1");
+
+ addr = REDIST_REGION_ATTR_ADDR(1, 1ULL << max_ipa_bits, 0, 2);
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
+ TEST_ASSERT(ret == -E2BIG, "register redist region with base address beyond IPA range");
+
+ addr = 0x260000;
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST, &addr, true);
+ TEST_ASSERT(ret == -EINVAL, "Mix KVM_VGIC_V3_ADDR_TYPE_REDIST and REDIST_REGION");
+
+ /*
+ * Now there are 2 redist regions:
+ * region 0 @ 0x200000 2 redists
+ * region 1 @ 0x240000 1 redist
+ * now attempt to read their characteristics
+ */
+
+ addr = REDIST_REGION_ATTR_ADDR(0, 0, 0, 0);
+ expected_addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 0, 0);
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, false);
+ TEST_ASSERT(!ret && addr == expected_addr, "read characteristics of region #0");
+
+ addr = REDIST_REGION_ATTR_ADDR(0, 0, 0, 1);
+ expected_addr = REDIST_REGION_ATTR_ADDR(1, 0x240000, 0, 1);
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, false);
+ TEST_ASSERT(!ret && addr == expected_addr, "read characteristics of region #1");
+
+ addr = REDIST_REGION_ATTR_ADDR(0, 0, 0, 2);
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, false);
+ TEST_ASSERT(ret == -ENOENT, "read characteristics of non existing region");
+
+ addr = 0x260000;
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_DIST, &addr, true);
+ TEST_ASSERT(!ret, "set dist region");
+
+ addr = REDIST_REGION_ATTR_ADDR(1, 0x260000, 0, 2);
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
+ TEST_ASSERT(ret == -EINVAL, "register redist region colliding with dist");
+
+ return gicv3_fd;
+}
+
+static void vgic_first(void)
+{
+ int ret, i, gicv3_fd;
+ struct kvm_vm *vm;
+
+ vm = vm_create_default(0, 0, guest_code);
+
+ gicv3_fd = dist_rdist_tests(vm);
+
+ /* Add the rest of the VCPUs */
+ for (i = 1; i < NR_VCPUS; ++i)
+ vm_vcpu_add_default(vm, i, guest_code);
+
+ ret = run_vcpu(vm, 3);
+ TEST_ASSERT(ret == -EINVAL, "dist/rdist overlap detected on 1st vcpu run");
+
+ close(gicv3_fd);
+ kvm_vm_free(vm);
+}
+
+
+static void vcpu_first(void)
+{
+ int ret, i, gicv3_fd;
+ struct kvm_vm *vm;
+
+ vm = vm_create_default(0, 0, guest_code);
+
+ /* Add the rest of the VCPUs */
+ for (i = 1; i < NR_VCPUS; ++i)
+ vm_vcpu_add_default(vm, i, guest_code);
+
+ gicv3_fd = dist_rdist_tests(vm);
+
+ ret = run_vcpu(vm, 3);
+ TEST_ASSERT(ret == -EINVAL, "dist/rdist overlap detected on 1st vcpu run");
+
+ close(gicv3_fd);
+ kvm_vm_free(vm);
+}
+
+static void redist_regions(void)
+{
+ int ret, i, gicv3_fd = -1;
+ struct kvm_vm *vm;
+ uint64_t addr;
+ void *dummy = NULL;
+
+ vm = vm_create_default(0, 0, guest_code);
+ ucall_init(vm, NULL);
+
+ /* Add the rest of the VCPUs */
+ for (i = 1; i < NR_VCPUS; ++i)
+ vm_vcpu_add_default(vm, i, guest_code);
+
+ gicv3_fd = redist_region_tests(vm, gicv3_fd);
+
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
+ KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true);
+ TEST_ASSERT(!ret, "init the vgic");
+
+ ret = run_vcpu(vm, 3);
+ TEST_ASSERT(ret == -ENXIO, "running without sufficient number of rdists");
+
+ /*
+ * At this time the kvm_vgic_map_resources destroyed the vgic
+ * Redo everything
+ */
+ gicv3_fd = redist_region_tests(vm, gicv3_fd);
+
+ addr = REDIST_REGION_ATTR_ADDR(1, 0x280000, 0, 2);
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
+ TEST_ASSERT(!ret, "register a third region allowing to cover the 4 vcpus");
+
+ ret = run_vcpu(vm, 3);
+ TEST_ASSERT(ret == -EBUSY, "running without vgic explicit init");
+
+ /* again need to redo init and this time do the explicit init*/
+ gicv3_fd = redist_region_tests(vm, gicv3_fd);
+
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, dummy, true);
+ TEST_ASSERT(ret == -EFAULT, "register a third region allowing to cover the 4 vcpus");
+
+ addr = REDIST_REGION_ATTR_ADDR(1, 0x280000, 0, 2);
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
+ TEST_ASSERT(!ret, "register a third region allowing to cover the 4 vcpus");
+
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
+ KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true);
+ TEST_ASSERT(!ret, "init the vgic");
+
+ ret = run_vcpu(vm, 3);
+ TEST_ASSERT(!ret, "vcpu run");
+
+ close(gicv3_fd);
+ kvm_vm_free(vm);
+}
+
+static void typer_accesses(void)
+{
+ int ret, i, gicv3_fd = -1;
+ uint64_t addr;
+ struct kvm_vm *vm;
+ uint32_t val;
+
+ vm = vm_create_default(0, 0, guest_code);
+ ucall_init(vm, NULL);
+
+ gicv3_fd = kvm_create_device(vm, KVM_DEV_TYPE_ARM_VGIC_V3, false);
+ TEST_ASSERT(gicv3_fd >= 0, "VGIC_V3 device created");
+
+ vm_vcpu_add_default(vm, 3, guest_code);
+
+ ret = access_redist_reg(gicv3_fd, 1, GICR_TYPER, &val, false);
+ TEST_ASSERT(ret == -EINVAL, "attempting to read GICR_TYPER of non created vcpu");
+
+ vm_vcpu_add_default(vm, 1, guest_code);
+
+ ret = access_redist_reg(gicv3_fd, 1, GICR_TYPER, &val, false);
+ TEST_ASSERT(ret == -EBUSY, "read GICR_TYPER before GIC initialized");
+
+ vm_vcpu_add_default(vm, 2, guest_code);
+
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
+ KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true);
+ TEST_ASSERT(!ret, "init the vgic after the vcpu creations");
+
+ for (i = 0; i < NR_VCPUS ; i++) {
+ ret = access_redist_reg(gicv3_fd, 0, GICR_TYPER, &val, false);
+ TEST_ASSERT(!ret && !val, "read GICR_TYPER before rdist region setting");
+ }
+
+ addr = REDIST_REGION_ATTR_ADDR(2, 0x200000, 0, 0);
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
+ TEST_ASSERT(!ret, "first rdist region with a capacity of 2 rdists");
+
+ /* The 2 first rdists should be put there (vcpu 0 and 3) */
+ ret = access_redist_reg(gicv3_fd, 0, GICR_TYPER, &val, false);
+ TEST_ASSERT(!ret && !val, "read typer of rdist #0");
+
+ ret = access_redist_reg(gicv3_fd, 3, GICR_TYPER, &val, false);
+ TEST_ASSERT(!ret && val == 0x310, "read typer of rdist #1");
+
+ addr = REDIST_REGION_ATTR_ADDR(10, 0x100000, 0, 1);
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
+ TEST_ASSERT(ret == -EINVAL, "collision with previous rdist region");
+
+ ret = access_redist_reg(gicv3_fd, 1, GICR_TYPER, &val, false);
+ TEST_ASSERT(!ret && val == 0x100,
+ "no redist region attached to vcpu #1 yet, last cannot be returned");
+
+ ret = access_redist_reg(gicv3_fd, 2, GICR_TYPER, &val, false);
+ TEST_ASSERT(!ret && val == 0x200,
+ "no redist region attached to vcpu #2, last cannot be returned");
+
+ addr = REDIST_REGION_ATTR_ADDR(10, 0x20000, 0, 1);
+ ret = kvm_device_access(gicv3_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
+ KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr, true);
+ TEST_ASSERT(!ret, "second rdist region");
+
+ ret = access_redist_reg(gicv3_fd, 1, GICR_TYPER, &val, false);
+ TEST_ASSERT(!ret && val == 0x100, "read typer of rdist #1");
+
+ ret = access_redist_reg(gicv3_fd, 2, GICR_TYPER, &val, false);
+ TEST_ASSERT(!ret && val == 0x210,
+ "read typer of rdist #1, last properly returned");
+
+ close(gicv3_fd);
+ kvm_vm_free(vm);
+}
+
+int main(int ac, char **av)
+{
+ vcpu_first();
+ vgic_first();
+ redist_regions();
+ typer_accesses();
+
+ return 0;
+}
+
diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h
index 5cbb861525ed..2262304c6150 100644
--- a/tools/testing/selftests/kvm/include/kvm_util.h
+++ b/tools/testing/selftests/kvm/include/kvm_util.h
@@ -229,6 +229,11 @@ int vcpu_nested_state_set(struct kvm_vm *vm, uint32_t vcpuid,
#endif
void *vcpu_map_dirty_ring(struct kvm_vm *vm, uint32_t vcpuid);
+int kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr);
+int kvm_create_device(struct kvm_vm *vm, uint64_t type, bool test);
+int kvm_device_access(int dev_fd, uint32_t group, uint64_t attr,
+ void *val, bool write);
+
const char *exit_reason_str(unsigned int exit_reason);
void virt_pgd_alloc(struct kvm_vm *vm, uint32_t pgd_memslot);
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index fa5a90e6c6f0..f3c7d38cfe78 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -1726,6 +1726,57 @@ int _kvm_ioctl(struct kvm_vm *vm, unsigned long cmd, void *arg)
return ioctl(vm->kvm_fd, cmd, arg);
}
+/*
+ * Device Ioctl
+ */
+
+int kvm_device_check_attr(int dev_fd, uint32_t group, uint64_t attr)
+{
+ struct kvm_device_attr attribute = {
+ .group = group,
+ .attr = attr,
+ .flags = 0,
+ };
+ int ret;
+
+ ret = ioctl(dev_fd, KVM_HAS_DEVICE_ATTR, &attribute);
+ if (ret == -1)
+ return -errno;
+ return ret;
+}
+
+int kvm_create_device(struct kvm_vm *vm, uint64_t type, bool test)
+{
+ struct kvm_create_device create_dev;
+ int ret;
+
+ create_dev.type = type;
+ create_dev.fd = -1;
+ create_dev.flags = test ? KVM_CREATE_DEVICE_TEST : 0;
+ ret = ioctl(vm_get_fd(vm), KVM_CREATE_DEVICE, &create_dev);
+ if (ret == -1)
+ return -errno;
+ return test ? 0 : create_dev.fd;
+}
+
+int kvm_device_access(int dev_fd, uint32_t group, uint64_t attr,
+ void *val, bool write)
+{
+ struct kvm_device_attr kvmattr = {
+ .group = group,
+ .attr = attr,
+ .flags = 0,
+ .addr = (uintptr_t)val,
+ };
+ int ret;
+
+ ret = ioctl(dev_fd, write ? KVM_SET_DEVICE_ATTR : KVM_GET_DEVICE_ATTR,
+ &kvmattr);
+ if (ret)
+ return -errno;
+ return ret;
+}
+
/*
* VM Dump
*
--
2.21.3
^ permalink raw reply related [flat|nested] 10+ messages in thread
end of thread, other threads:[~2021-01-14 10:41 UTC | newest]
Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-01-14 10:36 [PATCH v2 0/9] KVM/ARM: Some vgic fixes and init sequence KVM selftests Eric Auger
2021-01-14 10:37 ` [PATCH v2 1/9] KVM: arm64: vgic-v3: Fix some error codes when setting RDIST base Eric Auger
2021-01-14 10:37 ` [PATCH v2 2/9] KVM: arm64: Fix KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION read Eric Auger
2021-01-14 10:37 ` [PATCH v2 3/9] KVM: arm64: vgic-v3: Fix error handling in vgic_v3_set_redist_base() Eric Auger
2021-01-14 10:37 ` [PATCH v2 4/9] KVM: arm/arm64: vgic: Reset base address on kvm_vgic_dist_destroy() Eric Auger
2021-01-14 10:37 ` [PATCH v2 5/9] KVM: arm: move has_run_once after the map_resources Eric Auger
2021-01-14 10:37 ` [PATCH v2 6/9] docs: kvm: devices/arm-vgic-v3: enhance KVM_DEV_ARM_VGIC_CTRL_INIT doc Eric Auger
2021-01-14 10:37 ` [PATCH v2 7/9] KVM: arm64: Simplify argument passing to vgic_uaccess_[read|write] Eric Auger
2021-01-14 10:37 ` [PATCH v2 8/9] KVM: arm64: vgic-v3: Expose GICR_TYPER.Last for userspace Eric Auger
2021-01-14 10:37 ` [PATCH v2 9/9] KVM: selftests: aarch64/vgic-v3 init sequence tests Eric Auger
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