Provides a file descriptor per VM to read VM stats info/data.
Provides a file descriptor per vCPU to read vCPU stats info/data.
Reviewed-by: David Matlack
Reviewed-by: Ricardo Koller
Signed-off-by: Jing Zhang
---
arch/arm64/kvm/guest.c| 26 +++
arch/mips/kvm/mips.c | 52
Put all generic statistics in a separate structure to ease
statistics handling for the incoming new statistics API.
No functional change intended.
Reviewed-by: David Matlack
Reviewed-by: Ricardo Koller
Signed-off-by: Jing Zhang
---
arch/arm64/include/asm/kvm_host.h | 9 ++---
Update KVM API documentation for binary statistics.
Reviewed-by: David Matlack
Reviewed-by: Ricardo Koller
Signed-off-by: Jing Zhang
---
Documentation/virt/kvm/api.rst | 180 +
1 file changed, 180 insertions(+)
diff --git a/Documentation/virt/kvm/api.rst
This patchset provides a file descriptor for every VM and VCPU to read
KVM statistics data in binary format.
It is meant to provide a lightweight, flexible, scalable and efficient
lock-free solution for user space telemetry applications to pull the
statistics data periodically for large scale
Add selftest to check KVM stats descriptors validity.
Reviewed-by: David Matlack
Reviewed-by: Ricardo Koller
Signed-off-by: Jing Zhang
---
tools/testing/selftests/kvm/.gitignore| 1 +
tools/testing/selftests/kvm/Makefile | 3 +
.../testing/selftests/kvm/include/kvm_util.h
Introduce a new VM capability, KVM_CAP_ARM_PROTECTED_VM, which can be
used to isolate guest memory from the host. For now, the EL2 portion is
missing, so this documents and exposes the user ABI for the host.
Signed-off-by: Will Deacon
---
Documentation/virt/kvm/api.rst| 69
Add support for a "linux,pkvm-guest-firmware-memory" reserved memory
region, which can be used to identify a firmware image for protected
VMs.
Signed-off-by: Will Deacon
---
arch/arm64/kvm/Makefile | 2 +-
arch/arm64/kvm/pkvm.c | 52 +
2 files changed,
has_vhe() expands to a compile-time constant when evaluated from the VHE
or nVHE code, alternatively checking a static key when called from
elsewhere in the kernel. On face value, this looks like a case of
premature optimization, but in fact this allows symbol references on
VHE-specific code paths
Ignore 'kvm-arm.mode=protected' when using VHE so that kvm_get_mode()
only returns KVM_MODE_PROTECTED on systems where the feature is available.
Cc: David Brazdil
Signed-off-by: Will Deacon
---
Documentation/admin-guide/kernel-parameters.txt | 1 -
arch/arm64/kernel/cpufeature.c
Hi folks,
These patches implement support for userspace to request a "Protected VM"
using KVM on arm64 when configured in Protected Mode (see the existing
kvm-arm.mode=protected command-line option).
The final patch documents the new ABI and its behaviour, so I won't
reproduce that here. Please
On Fri, Jun 04, 2021 at 01:43:15AM +0900, Sergey Senozhatsky wrote:
> Add KVM suspend/hibernate PM-notifier which lets architectures
> to implement arch-specific VM suspend code. For instance, on x86
> this sets PVCLOCK_GUEST_STOPPED on all the VCPUs.
>
> Our case is that user puts the host
On Mon, May 24, 2021 at 11:45:12AM +0100, Steven Price wrote:
> diff --git a/arch/arm64/include/uapi/asm/kvm.h
> b/arch/arm64/include/uapi/asm/kvm.h
> index 24223adae150..b3edde68bc3e 100644
> --- a/arch/arm64/include/uapi/asm/kvm.h
> +++ b/arch/arm64/include/uapi/asm/kvm.h
> @@ -184,6 +184,17 @@
On Mon, May 24, 2021 at 11:45:11AM +0100, Steven Price wrote:
> It's now safe for the VMM to enable MTE in a guest, so expose the
> capability to user space.
>
> Signed-off-by: Steven Price
Reviewed-by: Catalin Marinas
___
kvmarm mailing list
On Mon, May 24, 2021 at 11:45:10AM +0100, Steven Price wrote:
> diff --git a/arch/arm64/include/asm/kvm_mte.h
> b/arch/arm64/include/asm/kvm_mte.h
> new file mode 100644
> index ..eae4bce9e269
> --- /dev/null
> +++ b/arch/arm64/include/asm/kvm_mte.h
> @@ -0,0 +1,68 @@
> +/*
Hi Jinank,
On Thu, 03 Jun 2021 12:05:54 +0100,
Jinank Jain wrote:
>
> Currently if a guest is live-migrated while it is actively using perf
> counters, then after live-migrate it will notice that all counters would
> suddenly start reporting 0s. This is due to the fact we are not
> re-creating
On Mon, May 24, 2021 at 11:45:09AM +0100, Steven Price wrote:
> diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
> index c5d1f3c87dbd..226035cf7d6c 100644
> --- a/arch/arm64/kvm/mmu.c
> +++ b/arch/arm64/kvm/mmu.c
> @@ -822,6 +822,42 @@ transparent_hugepage_adjust(struct kvm_memory_slot
>
Currently if a guest is live-migrated while it is actively using perf
counters, then after live-migrate it will notice that all counters would
suddenly start reporting 0s. This is due to the fact we are not
re-creating the relevant perf events inside the kernel.
Usually on live-migration guest
Hi Jinank,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on kvmarm/next]
[also build test WARNING on arm/for-next soc/for-next arm64/for-next/core
v5.13-rc4 next-20210603]
[cannot apply to xlnx/master]
[If your patch is applied to the wrong git tree, kindly
On Mon, May 24, 2021 at 11:45:08AM +0100, Steven Price wrote:
> A KVM guest could store tags in a page even if the VMM hasn't mapped
> the page with PROT_MTE. So when restoring pages from swap we will
> need to check to see if there are any saved tags even if !pte_tagged().
>
> However don't
Hi Quentin,
On 2021/6/2 19:07, Quentin Perret wrote:
On Thursday 15 Apr 2021 at 19:50:32 (+0800), Yanan Wang wrote:
With a guest translation fault, the memcache pages are not needed if KVM
is only about to install a new leaf entry into the existing page table.
And with a guest permission
Hi Quentin,
On 2021/6/2 18:43, Quentin Perret wrote:
Hi Yanan,
On Thursday 15 Apr 2021 at 19:50:27 (+0800), Yanan Wang wrote:
diff --git a/arch/arm64/include/asm/kvm_pgtable.h
b/arch/arm64/include/asm/kvm_pgtable.h
index c3674c47d48c..a43cbe697b37 100644
---
Hi Quentin,
On 2021/6/2 18:58, Quentin Perret wrote:
On Thursday 15 Apr 2021 at 19:50:31 (+0800), Yanan Wang wrote:
In this patch, we move invalidation of I-cache to the fault handlers to
Nit: please avoid using 'This patch' in commit messages, see
Hi Marc,
On 2021/6/2 18:22, Marc Zyngier wrote:
On Thu, 15 Apr 2021 12:50:30 +0100,
Yanan Wang wrote:
We want to move I-cache maintenance for the guest to the stage-2
page table code for performance improvement. Before it can work,
we should first make function invalidate_icache_range
Hi Marc,
On 2021/6/2 18:19, Marc Zyngier wrote:
On Thu, 15 Apr 2021 12:50:28 +0100,
Yanan Wang wrote:
We currently uniformly permorm CMOs of D-cache and I-cache in function
user_mem_abort before calling the fault handlers. If we get concurrent
guest faults(e.g. translation faults, permission
On Wed, Jun 02, 2021 at 04:40:28PM -0700, Ricardo Koller wrote:
> On Mon, May 31, 2021 at 12:33:40PM +0200, Andrew Jones wrote:
> > We already break register lists into sublists that get selected based
> > on vcpu config. However, since we only had two configs (vregs and sve),
> > we didn't
On Thu, 03 Jun 2021 09:39:09 +0100,
Marc Zyngier wrote:
>
> Hi Jamie,
>
> Funny, your email has a "Mail-Followup-To:" field that contains
> everyone but you... Not ideal! ;-)
>
> On Thu, 03 Jun 2021 08:07:22 +0100,
> Jamie Iles wrote:
> >
> > Hi Marc,
> >
> > On Mon, May 10, 2021 at
Hi Marc,
On Mon, May 10, 2021 at 05:58:14PM +0100, Marc Zyngier wrote:
> Here the bi-annual drop of the KVM/arm64 NV support code.
>
> Not a lot has changed since [1], except for a discovery mechanism for
> the EL2 support, some tidying up in the idreg emulation, dropping RMR
> support, and a
Hi Jamie,
Funny, your email has a "Mail-Followup-To:" field that contains
everyone but you... Not ideal! ;-)
On Thu, 03 Jun 2021 08:07:22 +0100,
Jamie Iles wrote:
>
> Hi Marc,
>
> On Mon, May 10, 2021 at 05:58:14PM +0100, Marc Zyngier wrote:
> > Here the bi-annual drop of the KVM/arm64 NV
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