[GIT PULL] KVM/arm64 fixes for 7.1, take #2

[Paolo Bonzini]

On Thu, May 7, 2026 at 5:42 PM Marc Zyngier <maz at kernel.org> wrote:
>
> Paolo,
>
> Here's the second set of KVM/arm64 fixes for 7.1. Nothing too horrible
> this time, aside from an ARM erratum workaround that has little impact
> on KVM, but relies on some firmware dealing with the problem. Bleh.
>
> The rest is a small collection of bug fixes, mostly affecting the MMU
> (permission fault handling with guest_memfd, 52bit VA with NV), and a
> small set of AI-enhanced fixes from Fuad. I guess I'll have to get
> used to that.
>
> And last but not least, Steffen joins the merry band of KVM/arm64
> reviewers in preparation of s390 and arm64 being joined at the hip...
>
> Please pull,

Done, thanks.

Paolo

>
>         M.
>
> The following changes since commit 7fd2df204f342fc17d1a0bfcd474b24232fb0f32:
>
>   Linux 7.1-rc2 (2026-05-03 14:21:25 -0700)
>
> are available in the Git repository at:
>
>   git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git kvmarm-fixes-7.1-2
>
> for you to fetch changes up to effc0a39b8e0f30670fe24f51e44329d4324e566:
>
>   KVM: arm64: Pre-check vcpu memcache for host->guest donate (2026-05-07 14:12:42 +0100)
>
> ----------------------------------------------------------------
> KVM/arm64 fixes for 7.1, take #2
>
> - Add the pKVM side of the workaround for ARM's erratum 4193714, provided
>   that the EL3 firmware does its part of the job. KVM will refuse to
>   initialise otherwise.
>
> - Correctly handle 52bit VAs for guest EL2 stage-1 translations when
>   running under NV with E2H==0.
>
> - Correctly deal with permission faults in guest_memfd memslots.
>
> - Fix the steal-time selftest after the infrastructure was reworked.
>
> - Make sure the host cannot pass a non-sensical clock update to the
>   EL2 tracing infrastructure.
>
> - Appoint Steffen Eiden as a reviewer in anticipation of the KVM/s390
>   ability to run arm64 guests, which will inevitably lead to arm64
>   code being directly used on s390.
>
> - Make sure that EL2 is configured with both exception entry and exit
>   being Context Synchronization Events.
>
> - Handle the current vcpu being NULL on EL2 panic.
>
> - Fix the selftest_vcpu memcache being empty at the point of donation or
>   sharing.
>
> - Check that the memcache has enough capacity before engaging on the
>   share/donate path.
>
> - Fix __deactivate_fgt() to use its parameter rather than a variable
>   in the macro context.
>
> ----------------------------------------------------------------
> Alexandru Elisei (1):
>       KVM: arm64: Handle permission faults with guest_memfd
>
> Fuad Tabba (6):
>       KVM: arm64: Make EL2 exception entry and exit context-synchronization events
>       KVM: arm64: Guard against NULL vcpu on VHE hyp panic path
>       KVM: arm64: Fix __deactivate_fgt macro parameter typo
>       KVM: arm64: Seed pkvm_ownership_selftest vcpu memcache
>       KVM: arm64: Pre-check vcpu memcache for host->guest share
>       KVM: arm64: Pre-check vcpu memcache for host->guest donate
>
> James Morse (1):
>       KVM: arm64: Work around C1-Pro erratum 4193714 for protected guests
>
> Mostafa Saleh (1):
>       KVM: arm64: Remove potential UB on nvhe tracing clock update
>
> Sebastian Ott (1):
>       KVM: selftests: arm64: Fix steal_time test after UAPI refactoring
>
> Steffen Eiden (1):
>       MAINTAINERS: Add Steffen as reviewer for KVM/arm64
>
> Wei-Lin Chang (1):
>       KVM: arm64: nv: Consider the DS bit when translating TCR_EL2
>
>  MAINTAINERS                              |  1 +
>  arch/arm64/include/asm/kvm_nested.h      |  1 +
>  arch/arm64/include/asm/sysreg.h          |  2 +-
>  arch/arm64/kvm/arm.c                     | 21 ++++++++++++++
>  arch/arm64/kvm/hyp/include/hyp/switch.h  |  2 +-
>  arch/arm64/kvm/hyp/nvhe/clock.c          |  3 ++
>  arch/arm64/kvm/hyp/nvhe/mem_protect.c    | 47 +++++++++++++++++++++++++++++++-
>  arch/arm64/kvm/hyp/nvhe/pkvm.c           | 16 ++++++++++-
>  arch/arm64/kvm/hyp/vhe/switch.c          |  3 +-
>  arch/arm64/kvm/mmu.c                     | 29 ++++++++++++++------
>  include/linux/arm-smccc.h                |  6 ++++
>  tools/testing/selftests/kvm/steal_time.c |  2 ++
>  12 files changed, 120 insertions(+), 13 deletions(-)
>