ill usable.
struct kvm_userspace_memory_region {
__u32 slot; /* 1*/
__u32 flags; /* 0*/
__u64 guest_phys_addr;/* 0xfff000 */
__u64 memory_size;/* 0x1000 */
__u64 userspace_addr;
};
Signed-off
The series includes several minior improvements to stage-2 page fault
handler: PATCH[1/2] are cleaning up the code. PATCH[3] fixes the address
range check on adding new memory slot. PATCH[4] don't retrieve the memory
slot again in the page fault handler to save a bit CPU cycles.
Gavin Sh
from 928ms to 864ms.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/mmu.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index a5a8ade9fde4..4a4abcccfafb 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -846,7 +
We needn't expose the function as it's only used by mmu.c.
Signed-off-by: Gavin Shan
---
arch/arm64/include/asm/kvm_host.h | 1 -
arch/arm64/kvm/mmu.c | 2 +-
2 files changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/arm64/include/asm/kvm_host.h
b/arch/arm64/i
find_vma_intersection() has been existing to search the intersected
vma. This uses the function where it's applicable, to simplify the
code.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/mmu.c | 10 ++
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/arch/arm64/kvm/mm
Hi Marc,
On 3/15/21 7:52 PM, Marc Zyngier wrote:
On Mon, 15 Mar 2021 04:18:42 +,
Gavin Shan wrote:
find_vma_intersection() has been existing to search the intersected
vma. This uses the function where it's applicable, to simplify the
code.
Signed-off-by: Gavin Shan
---
arch/arm6
Hi Keqian,
On 3/15/21 7:04 PM, Keqian Zhu wrote:
On 2021/3/15 12:18, Gavin Shan wrote:
find_vma_intersection() has been existing to search the intersected
vma. This uses the function where it's applicable, to simplify the
code.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/mmu.c
Hi Keqian,
On 3/15/21 6:33 PM, Keqian Zhu wrote:
FYI, this has been fixed by Marc in commit 262b003d059c.
Yeah, I didn't check 5.12.rc3 code where the issue has been
fixed. So please ignore this one and sorry for the noise.
Thanks,
Gavin
On 2021/3/15 12:18, Gavin Shan wrote:
The
Hi Keqian,
On 3/15/21 7:25 PM, Keqian Zhu wrote:
On 2021/3/15 12:18, Gavin Shan wrote:
We needn't retrieve the memory slot again in user_mem_abort() because
the corresponding memory slot has been passed from the caller. This
I think you are right, though fault_ipa will be adjusted when w
Hi Keqian,
On 3/15/21 8:42 PM, Gavin Shan wrote:
On 3/15/21 7:04 PM, Keqian Zhu wrote:
On 2021/3/15 12:18, Gavin Shan wrote:
find_vma_intersection() has been existing to search the intersected
vma. This uses the function where it's applicable, to simplify the
code.
Signed-off-by: Gavin
eqian (Gavin)
* Drop patch to fix IPA limit boundary issue(Keqian)
* Comments on why we use __gfn_to_pfn_memslot() (Keqian)
Gavin Shan (3):
KVM: arm64: Hide kvm_mmu_wp_memory_region()
KVM: arm64: Use find_vma_intersection()
KVM: arm64: Don't retrieve memory slot again in
We needn't expose the function as it's only used by mmu.c since it
was introduced by commit c64735554c0a ("KVM: arm: Add initial dirty
page locking support").
Signed-off-by: Gavin Shan
Reviewed-by: Keqian Zhu
---
arch/arm64/include/asm/kvm_host.h | 1 -
arch/arm64/kvm/mm
from 928ms to 864ms.
Signed-off-by: Gavin Shan
Reviewed-by: Keqian Zhu
---
arch/arm64/kvm/mmu.c | 9 +++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index 192e0df2fc8e..2491b40a294a 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/
find_vma_intersection() has been existing to search the intersected
vma. This uses the function where it's applicable, to simplify the
code.
Signed-off-by: Gavin Shan
Reviewed-by: Keqian Zhu
---
arch/arm64/kvm/mmu.c | 10 ++
1 file changed, 6 insertions(+), 4 deletions(-)
diff --
Hi Keqian and Santosh,
On 4/21/21 12:59 PM, Keqian Zhu wrote:
On 2020/10/22 0:16, Santosh Shukla wrote:
The Commit:6d674e28 introduces a notion to detect and handle the
device mapping. The commit checks for the VM_PFNMAP flag is set
in vma->flags and if set then marks force_pte to true such tha
Hi Keqian,
On 4/16/21 12:03 AM, Keqian Zhu wrote:
The MMIO regions may be unmapped for many reasons and can be remapped
by stage2 fault path. Map MMIO regions at creation time becomes a
minor optimization and makes these two mapping path hard to sync.
Remove the mapping code while keep the usef
Hi Keqian,
On 4/16/21 12:03 AM, Keqian Zhu wrote:
The MMIO region of a device maybe huge (GB level), try to use
block mapping in stage2 to speedup both map and unmap.
Compared to normal memory mapping, we should consider two more
points when try block mapping for MMIO region:
1. For normal mem
Hi Marc,
On 4/21/21 9:59 PM, Marc Zyngier wrote:
On Wed, 21 Apr 2021 07:17:44 +0100,
Keqian Zhu wrote:
On 2021/4/21 14:20, Gavin Shan wrote:
On 4/21/21 12:59 PM, Keqian Zhu wrote:
On 2020/10/22 0:16, Santosh Shukla wrote:
The Commit:6d674e28 introduces a notion to detect and handle the
Hi Keqian,
On 4/21/21 4:28 PM, Keqian Zhu wrote:
On 2021/4/21 14:38, Gavin Shan wrote:
On 4/16/21 12:03 AM, Keqian Zhu wrote:
The MMIO regions may be unmapped for many reasons and can be remapped
by stage2 fault path. Map MMIO regions at creation time becomes a
minor optimization and makes
Hi Keqian,
On 4/21/21 4:36 PM, Keqian Zhu wrote:
On 2021/4/21 15:52, Gavin Shan wrote:
On 4/16/21 12:03 AM, Keqian Zhu wrote:
The MMIO region of a device maybe huge (GB level), try to use
block mapping in stage2 to speedup both map and unmap.
Compared to normal memory mapping, we should
check.
Signed-off-by: Keqian Zhu
---
arch/arm64/kvm/mmu.c | 38 +++---
1 file changed, 3 insertions(+), 35 deletions(-)
Reviewed-by: Gavin Shan
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index 8711894db8c2..c59af5ca01b0 100644
--- a/arch
and check these two points when
selecting block mapping size for MMIO region.
Signed-off-by: Keqian Zhu
---
arch/arm64/kvm/mmu.c | 61
1 file changed, 51 insertions(+), 10 deletions(-)
Reviewed-by: Gavin Shan
diff --git a/arch/arm64/kvm/mmu.c b/
Hi Marc,
On 4/22/21 4:51 PM, Marc Zyngier wrote:
On Thu, 22 Apr 2021 03:25:23 +0100,
Gavin Shan wrote:
On 4/21/21 4:36 PM, Keqian Zhu wrote:
On 2021/4/21 15:52, Gavin Shan wrote:
On 4/16/21 12:03 AM, Keqian Zhu wrote:
The MMIO region of a device maybe huge (GB level), try to use
block
Hi Keqian,
On 4/22/21 5:41 PM, Keqian Zhu wrote:
On 2021/4/22 10:12, Gavin Shan wrote:
On 4/21/21 4:28 PM, Keqian Zhu wrote:
On 2021/4/21 14:38, Gavin Shan wrote:
On 4/16/21 12:03 AM, Keqian Zhu wrote:
[...]
Yeah, Sorry that I missed that part. Something associated with Santosh's
Hi Marc,
On 4/22/21 4:50 PM, Marc Zyngier wrote:
On Thu, 22 Apr 2021 03:02:00 +0100,
Gavin Shan wrote:
On 4/21/21 9:59 PM, Marc Zyngier wrote:
On Wed, 21 Apr 2021 07:17:44 +0100,
Keqian Zhu wrote:
On 2021/4/21 14:20, Gavin Shan wrote:
On 4/21/21 12:59 PM, Keqian Zhu wrote:
On 2020/10/22
re totally changed (Gavin)
* Added ioctl commands to support migration(Gavin)
Gavin Shan (21):
KVM: arm64: Introduce template for inline functions
KVM: arm64: Add SDEI virtualization infrastructure
KVM: arm64: Support SDEI_VERSION h
by SDEI virtualization
support.
Signed-off-by: Gavin Shan
---
include/kvm/arm_hypercalls.h | 34 +++---
1 file changed, 15 insertions(+), 19 deletions(-)
diff --git a/include/kvm/arm_hypercalls.h b/include/kvm/arm_hypercalls.h
index 0e2509d27910..1120eff7aa28 100644
ect to save the preempted context during SDEI event
delivery.
The error is returned for all SDEI hypercalls for now. They will be
implemented by the subsequent patches.
Signed-off-by: Gavin Shan
---
arch/arm64/include/asm/kvm_host.h | 4 +
arch/arm64/include/asm/kvm_sd
registered successfully, the KVM SDEI event (object)
is created or updated because the same KVM SDEI event is shared by
multiple vCPUs if it's a private event.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/sdei.c | 122 ++
1 file changed, 122 insertions
This supports SDEI_VERSION hypercall by returning v1.0.0 simply
when the functionality is supported on the VM and vCPU.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/sdei.c | 18 ++
1 file changed, 18 insertions(+)
diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c
index
ic vCPU.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/sdei.c | 68 +++
1 file changed, 68 insertions(+)
diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c
index d3ea3eee154b..b022ce0a202b 100644
--- a/arch/arm64/kvm/sdei.c
+++ b/arch/arm64/kvm/sdei
This supports SDEI_EVENT_CONTEXT hypercall. It's used by the guest
to retrieved the original registers (R0 - R17) in its SDEI event
handler. Those registers can be corrupted during the SDEI event
delivery.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/sdei.c
cific vCPU once it's unregistered successfully.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/sdei.c | 61 +++
1 file changed, 61 insertions(+)
diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c
index b4162efda470..a3ba69dc91cb 100644
--- a/arch/arm64/kv
This supports SDEI_EVENT_STATUS hypercall. It's used by the guest
to retrieve a bitmap to indicate the SDEI event states, including
registration, enablement and delivery state.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/sdei.c | 50 +++
1 file ch
This supports SDEI_EVENT_GET_INFO hypercall. It's used by the guest
to retrieve various information about the supported (exported) events,
including type, signaled, route mode and affinity for the shared
events.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/sdei.c
This supports SDEI_EVENT_ROUTING_SET hypercall. It's used by the
guest to set route mode and affinity for the registered KVM event.
It's only valid for the shared events. It's not allowed to do so
when the corresponding event has been raised to the guest.
Signed-off-by: Gavin
This supports SDEI_PE_{MASK, UNMASK} hypercall. They are used by
the guest to stop the specific vCPU from receiving SDEI events.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/sdei.c | 35 +++
1 file changed, 35 insertions(+)
diff --git a/arch/arm64/kvm/sdei.c b
This supports SDEI_{PRIVATE, SHARED}_RESET. They are used by the
guest to purge the private or shared SDEI events, which are registered
previously.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/sdei.c | 29 +
1 file changed, 29 insertions(+)
diff --git a/arch/arm64
.
* SDEI event with critical priority can preempt those with normal
priority.
Signed-off-by: Gavin Shan
---
arch/arm64/include/asm/kvm_host.h | 1 +
arch/arm64/include/asm/kvm_sdei.h | 1 +
arch/arm64/kvm/arm.c | 3 ++
arch/arm64/kvm/sdei.c | 84
the interrupted context.
* If it's SDEI_EVENT_COMPLETE_AND_RESUME hypercall, IRQ exception
is injected.
Signed-off-by: Gavin Shan
---
arch/arm64/include/asm/kvm_emulate.h | 1 +
arch/arm64/include/asm/kvm_host.h| 1 +
arch/arm64/kvm/hyp/exception.c | 7 +++
arch/arm6
The owner of the SDEI event, like asynchronous page fault, need
know the state of injected SDEI event. This supports SDEI event
state updating by introducing notifier mechanism. It's notable
the notifier (handler) should be capable of migration.
Signed-off-by: Gavin Shan
---
arch/arm64/in
ulate the registered SDEI event
Signed-off-by: Gavin Shan
---
arch/arm64/include/asm/kvm_sdei.h | 1 +
arch/arm64/include/uapi/asm/kvm_sdei.h | 17 +++
arch/arm64/kvm/arm.c | 3 +
arch/arm64/kvm/sdei.c | 171 +
include/uapi/linux/
state related to SDEI handling
* KVM_SDEI_CMD_SET_VCPU_STATE
Populate vCPU state related to SDEI handling
Signed-off-by: Gavin Shan
---
arch/arm64/include/asm/kvm_sdei.h | 1 +
arch/arm64/include/uapi/asm/kvm_sdei.h | 7 +
arch/arm64/kvm/arm.c | 3 +
arch/arm6
This supports SDEI event injection by implementing kvm_sdei_inject().
It's called by kernel directly or VMM through ioctl command to inject
SDEI event to the specific vCPU.
Signed-off-by: Gavin Shan
---
arch/arm64/include/asm/kvm_sdei.h | 2 +
arch/arm64/include/uapi/asm/kvm_sdei.h
ynchronous
page fault.
Signed-off-by: Gavin Shan
---
arch/arm64/include/asm/kvm_sdei.h | 1 +
arch/arm64/kvm/sdei.c | 49 +++
2 files changed, 50 insertions(+)
diff --git a/arch/arm64/include/asm/kvm_sdei.h
b/arch/arm64/include/asm/kvm_sdei.h
ind
The SDEI functionality is ready to be exported so far. This adds
new capability (KVM_CAP_ARM_SDEI) and exports it.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/arm.c | 3 +++
include/uapi/linux/kvm.h | 1 +
2 files changed, 4 insertions(+)
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm
ster event)
SDEI_1_0_FN_SDEI_PE_MASK(CPU offline)
Signed-off-by: Gavin Shan
---
tools/testing/selftests/kvm/Makefile | 1 +
tools/testing/selftests/kvm/aarch64/sdei.c | 172 +
2 files changed, 173 insertions(+)
create mode 100644 tools/testing/selftests/kvm/aarch64/sdei.c
di
uot;struct
kvm_async_pf".
* Added stub kvm_check_async_pf_completion() when CONFIG_KVM_ASYMC_PF
is disabled.
Signed-off-by: Gavin Shan
---
include/linux/kvm_host.h | 44 +---
1 file changed, 23 insertions(+), 21 deletions(-)
diff --git a/include/linux/kvm_
h_async_control" dymaicall and use
it to check if the feature has been enabled. The kernel
option (CONFIG_KVM_ASYNC_PF) isn't used. (James)
* Add document to explain the design (James)
* Make GFN hash table management generi
y the newly added inline
function since list_empty() and list_empty_careful() are interchangeable.
Signed-off-by: Gavin Shan
---
arch/x86/kvm/x86.c | 2 +-
include/linux/kvm_host.h | 10 ++
virt/kvm/async_pf.c | 10 +-
virt/kvm/kvm_main.c | 4 +---
4 files change
rm and arm64 in subsequent patches.
Signed-off-by: Gavin Shan
---
include/linux/kvm_host.h | 18 +
virt/kvm/Kconfig | 3 ++
virt/kvm/async_pf.c | 85
3 files changed, 106 insertions(+)
diff --git a/include/linux/kvm_host.h b/include/l
ff-by: Gavin Shan
---
arch/x86/include/asm/kvm_host.h | 2 -
arch/x86/kvm/Kconfig| 1 +
arch/x86/kvm/mmu/mmu.c | 2 +-
arch/x86/kvm/x86.c | 86 +++--
4 files changed, 8 insertions(+), 83 deletions(-)
diff --git a/arch/x86/includ
onous page fault in the subsequent patches:
include/uapi/asm-generic/kvm_para.h
include/asm-generic/kvm_para.h
arch/arm64/include/uapi/asm/kvm_para.h
arch/arm64/include/asm/kvm_para.h
Signed-off-by: Gavin Shan
---
arch/arm64/include/asm/kvm_para.h | 27 ++
ingly.
is_exec_fault: kvm_vcpu_trap_is_exec_fault
is_write_fault: kvm_is_write_fault()
esr_abt_fault_level: kvm_vcpu_trap_get_fault_level
Signed-off-by: Gavin Shan
---
arch/arm64/include/asm/esr.h | 6
arch/arm64/include/asm/kvm_emulate.h | 27 ++---
arch/arm64/in
uested page. "struct kvm{_,_arch}async_pf" is
associated with the worker, to track the work.
The feature isn't enabled by CONFIG_KVM_ASYNC_PF yet. Also, the
page-ready notification delivery and control path isn't implemented
and will be done in the subsequent patches.
Si
ready
notification. The region is represented by "struct kvm_vcpu_pv_apf_data".
The feature isn't enabled by CONFIG_KVM_ASYNC_PF yet. Also, the control
path isn't implemented and will be done in the subsequent patches.
Signed-off-by: Gavin Shan
---
arch/arm64/include/
quent
patches.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/async_pf.c | 119 ++
include/linux/arm-smccc.h | 5 ++
2 files changed, 124 insertions(+)
diff --git a/arch/arm64/kvm/async_pf.c b/arch/arm64/kvm/async_pf.c
index 0d2393e24ce6..3bc69a631996 100644
--- a
This exports the asynchronous page fault capability:
* Identify capability KVM_CAP_ASYNC_{PF, PF_INT}.
* Standardize SDEI event for asynchronous page fault.
* Enable kernel config CONFIG_KVM_ASYNC_{PF, PF_SLOT}.
Signed-off-by: Gavin Shan
---
arch/arm64/include/uapi/asm/kvm_sdei.h
KVM_ARM_ASYNC_PF_CMD_SET_CONTROL
Set control block when VM is migrated
Signed-off-by: Gavin Shan
---
arch/arm64/include/asm/kvm_host.h | 14 +++
arch/arm64/include/uapi/asm/kvm.h | 19 +
arch/arm64/kvm/arm.c | 6 +++
arch/arm64/kvm/async_pf.c | 64
page fault.
This also adds kernel option (CONFIG_KVM_GUEST), which is the umbrella
for the optimizations related to KVM para-virtualization.
Signed-off-by: Gavin Shan
---
arch/arm64/Kconfig | 11 +++
arch/arm64/include/asm/kvm_para.h | 12 +++-
arch/arm64
state for the process, to be rescheduled. With the flag is set, there
is a head of wait-queue is associated with the process. The process
keeps rescheduling itself until the flag is cleared when page-ready
notification is received through (PPI) interrupt.
Signed-off-by: Gavin Shan
---
arch/arm64/i
This adds document to explain the interface for asynchronous page
fault and how it works in general.
Signed-off-by: Gavin Shan
---
Documentation/virt/kvm/arm/apf.rst | 143 +++
Documentation/virt/kvm/arm/index.rst | 1 +
2 files changed, 144 insertions(+)
create
ough SMCCC interface. Besides, the version of the asynchronous
page fault is validated when the feature is enabled on the guest.
* The feature is disabled on guest when boot parameter "no-kvmapf"
is specified.
Signed-off-by: Gavin Shan
---
arch/arm64/kernel/Makefile |
64_SYS_REG(3, 3, 14, 15, 7),
This fixes the issue of wrongly reported missing PMU registers by
requesting it explicitly.
Signed-off-by: Gavin Shan
---
tools/testing/selftests/kvm/aarch64/get-reg-list.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/tools/testing/selftests/kvm/aarch64/ge
On 5/13/21 9:14 PM, Marc Zyngier wrote:
On 2021-05-13 14:06, Gavin Shan wrote:
Since the following commit, PMU registers are hidden from user until
it's explicitly requested by feeding feature (KVM_ARM_VCPU_PMU_V3).
Otherwise, 74 missing PMU registers are missing as the following
log indi
s almost rewritten as the data structures
are totally changed (Gavin)
* Added ioctl commands to support migration(Gavin)
Gavin Shan (21):
KVM: arm64: Introduce template for inline functions
KVM: arm64: Add SDEI virtualization infras
virtualization support.
Signed-off-by: Gavin Shan
---
include/kvm/arm_hypercalls.h | 34 +++---
1 file changed, 15 insertions(+), 19 deletions(-)
diff --git a/include/kvm/arm_hypercalls.h b/include/kvm/arm_hypercalls.h
index 0e2509d27910..ebecb6c68254 100644
--- a
ect to save the preempted context during SDEI event
delivery.
The error is returned for all SDEI hypercalls for now. They will be
implemented by the subsequent patches.
Signed-off-by: Gavin Shan
---
arch/arm64/include/asm/kvm_host.h | 6 +
arch/arm64/include/asm/kvm_sd
This supports SDEI_VERSION hypercall by returning v1.0.0 simply
when the functionality is supported on the VM and vCPU.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/sdei.c | 18 ++
1 file changed, 18 insertions(+)
diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c
index
registered successfully, the KVM SDEI event (object)
is created or updated because the same KVM SDEI event is shared by
multiple vCPUs if it's a private event.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/sdei.c | 122 ++
1 file changed, 122 insertions
ic vCPU.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/sdei.c | 68 +++
1 file changed, 68 insertions(+)
diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c
index d3ea3eee154b..b022ce0a202b 100644
--- a/arch/arm64/kvm/sdei.c
+++ b/arch/arm64/kvm/sdei
This supports SDEI_EVENT_CONTEXT hypercall. It's used by the guest
to retrieved the original registers (R0 - R17) in its SDEI event
handler. Those registers can be corrupted during the SDEI event
delivery.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/sdei.c
cific vCPU once it's unregistered successfully.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/sdei.c | 61 +++
1 file changed, 61 insertions(+)
diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c
index b4162efda470..a3ba69dc91cb 100644
--- a/arch/arm64/kv
This supports SDEI_EVENT_STATUS hypercall. It's used by the guest
to retrieve a bitmap to indicate the SDEI event states, including
registration, enablement and delivery state.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/sdei.c | 50 +++
1 file ch
This supports SDEI_EVENT_GET_INFO hypercall. It's used by the guest
to retrieve various information about the supported (exported) events,
including type, signaled, route mode and affinity for the shared
events.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/sdei.c
This supports SDEI_EVENT_ROUTING_SET hypercall. It's used by the
guest to set route mode and affinity for the registered KVM event.
It's only valid for the shared events. It's not allowed to do so
when the corresponding event has been raised to the guest.
Signed-off-by: Gavin
This supports SDEI_{PRIVATE, SHARED}_RESET. They are used by the
guest to purge the private or shared SDEI events, which are registered
previously.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/sdei.c | 29 +
1 file changed, 29 insertions(+)
diff --git a/arch/arm64
This supports SDEI_PE_{MASK, UNMASK} hypercall. They are used by
the guest to stop the specific vCPU from receiving SDEI events.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/sdei.c | 35 +++
1 file changed, 35 insertions(+)
diff --git a/arch/arm64/kvm/sdei.c b
.
* SDEI event with critical priority can preempt those with normal
priority.
Signed-off-by: Gavin Shan
---
arch/arm64/include/asm/kvm_host.h | 1 +
arch/arm64/include/asm/kvm_sdei.h | 1 +
arch/arm64/kvm/arm.c | 3 ++
arch/arm64/kvm/sdei.c | 84
the interrupted context.
* If it's SDEI_EVENT_COMPLETE_AND_RESUME hypercall, IRQ exception
is injected.
Signed-off-by: Gavin Shan
---
arch/arm64/include/asm/kvm_emulate.h | 1 +
arch/arm64/include/asm/kvm_host.h| 1 +
arch/arm64/kvm/hyp/exception.c | 7 +++
arch/arm6
The owner of the SDEI event, like asynchronous page fault, need
know the state of injected SDEI event. This supports SDEI event
state updating by introducing notifier mechanism. It's notable
the notifier (handler) should be capable of migration.
Signed-off-by: Gavin Shan
---
arch/arm64/in
ulate the registered SDEI event
Signed-off-by: Gavin Shan
---
arch/arm64/include/asm/kvm_sdei.h | 1 +
arch/arm64/include/uapi/asm/kvm_sdei.h | 17 +++
arch/arm64/kvm/arm.c | 3 +
arch/arm64/kvm/sdei.c | 171 +
include/uapi/linux/
state related to SDEI handling
* KVM_SDEI_CMD_SET_VCPU_STATE
Populate vCPU state related to SDEI handling
Signed-off-by: Gavin Shan
---
arch/arm64/include/asm/kvm_sdei.h | 1 +
arch/arm64/include/uapi/asm/kvm_sdei.h | 7 +
arch/arm64/kvm/arm.c | 3 +
arch/arm6
This supports SDEI event injection by implementing kvm_sdei_inject().
It's called by kernel directly or VMM through ioctl command to inject
SDEI event to the specific vCPU.
Signed-off-by: Gavin Shan
---
arch/arm64/include/asm/kvm_sdei.h | 2 +
arch/arm64/include/uapi/asm/kvm_sdei.h
ynchronous
page fault.
Signed-off-by: Gavin Shan
---
arch/arm64/include/asm/kvm_sdei.h | 1 +
arch/arm64/kvm/sdei.c | 49 +++
2 files changed, 50 insertions(+)
diff --git a/arch/arm64/include/asm/kvm_sdei.h
b/arch/arm64/include/asm/kvm_sdei.h
ind
The SDEI functionality is ready to be exported so far. This adds
new capability (KVM_CAP_ARM_SDEI) and exports it.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/arm.c | 3 +++
include/uapi/linux/kvm.h | 1 +
2 files changed, 4 insertions(+)
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm
ster event)
SDEI_1_0_FN_SDEI_PE_MASK(CPU offline)
Signed-off-by: Gavin Shan
---
tools/testing/selftests/kvm/Makefile | 1 +
tools/testing/selftests/kvm/aarch64/sdei.c | 171 +
2 files changed, 172 insertions(+)
create mode 100644 tools/testing/selftests/kvm/aarch64/sdei.c
di
On 8/15/21 10:13 AM, Gavin Shan wrote:
This series intends to virtualize Software Delegated Exception Interface
(SDEI), which is defined by DEN0054A. It allows the hypervisor to deliver
NMI-alike event to guest and it's needed by asynchronous page fault to
deliver page-not-present notific
nc_control" dymaicall and use
it to check if the feature has been enabled. The kernel
option (CONFIG_KVM_ASYNC_PF) isn't used. (James)
* Add document to explain the design (James)
* Make GFN hash table management generic
tub kvm_check_async_pf_completion() is also
added on !CONFIG_KVM_ASYNC_PF, which is needed by subsequent patches to
support asynchronous page fault on ARM64.
Signed-off-by: Gavin Shan
---
include/linux/kvm_host.h | 44 +---
1 file changed, 23 insertions(+), 21 deletions(-)
d
newly added inline
function since list_empty() and list_empty_careful() are interchangeable.
Signed-off-by: Gavin Shan
---
arch/x86/kvm/x86.c | 2 +-
include/linux/kvm_host.h | 10 ++
virt/kvm/async_pf.c | 10 +-
virt/kvm/kvm_main.c | 4 +---
4 files change
rm and arm64 in subsequent patches.
Signed-off-by: Gavin Shan
---
include/linux/kvm_host.h | 18 +
virt/kvm/Kconfig | 3 ++
virt/kvm/async_pf.c | 85
3 files changed, 106 insertions(+)
diff --git a/include/linux/kvm_host.h b/include/l
ff-by: Gavin Shan
---
arch/x86/include/asm/kvm_host.h | 2 -
arch/x86/kvm/Kconfig| 1 +
arch/x86/kvm/mmu/mmu.c | 2 +-
arch/x86/kvm/x86.c | 86 +++--
4 files changed, 8 insertions(+), 83 deletions(-)
diff --git a/arch/x86/includ
ingly.
is_exec_fault: kvm_vcpu_trap_is_exec_fault
is_write_fault: kvm_is_write_fault()
esr_abt_fault_level: kvm_vcpu_trap_get_fault_level
Signed-off-by: Gavin Shan
---
arch/arm64/include/asm/esr.h | 6
arch/arm64/include/asm/kvm_emulate.h | 27 ++---
arch/arm64/in
onous page fault in the subsequent patches:
include/uapi/asm-generic/kvm_para.h
include/asm-generic/kvm_para.h
arch/arm64/include/uapi/asm/kvm_para.h
arch/arm64/include/asm/kvm_para.h
Signed-off-by: Gavin Shan
---
arch/arm64/include/asm/kvm_para.h | 27 ++
uested page. "struct kvm{_,_arch}async_pf" is
associated with the worker, to track the work.
The feature isn't enabled by CONFIG_KVM_ASYNC_PF yet. Also, the
page-ready notification delivery and control path isn't implemented
and will be done in the subsequent patches.
Si
ready
notification. The region is represented by "struct kvm_vcpu_pv_apf_data".
The feature isn't enabled by CONFIG_KVM_ASYNC_PF yet. Also, the control
path isn't implemented and will be done in the subsequent patches.
Signed-off-by: Gavin Shan
---
arch/arm64/include/
quent
patches.
Signed-off-by: Gavin Shan
---
arch/arm64/kvm/async_pf.c | 119 ++
include/linux/arm-smccc.h | 5 ++
2 files changed, 124 insertions(+)
diff --git a/arch/arm64/kvm/async_pf.c b/arch/arm64/kvm/async_pf.c
index 0d2393e24ce6..3bc69a631996 100644
--- a
KVM_ARM_ASYNC_PF_CMD_SET_CONTROL
Set control block when VM is migrated
Signed-off-by: Gavin Shan
---
arch/arm64/include/asm/kvm_host.h | 14 +++
arch/arm64/include/uapi/asm/kvm.h | 19 +
arch/arm64/kvm/arm.c | 6 +++
arch/arm64/kvm/async_pf.c | 64
This exports the asynchronous page fault capability:
* Identify capability KVM_CAP_ASYNC_{PF, PF_INT}.
* Standardize SDEI event for asynchronous page fault.
* Enable kernel config CONFIG_KVM_ASYNC_{PF, PF_SLOT}.
Signed-off-by: Gavin Shan
---
arch/arm64/include/uapi/asm/kvm_sdei.h
1 - 100 of 637 matches
Mail list logo
