[GIT PULL] KVM/arm64 fixes for 6.16, take #2

[Paolo Bonzini]

On Fri, Jun 6, 2025 at 11:44 AM Marc Zyngier <maz at kernel.org> wrote:
>
> Paolo,
>
> Here the second batch of fixes for 6.16. We have a significant rework
> of our system register accessors so that the RES0/RES1 sanitisation
> gets applied at the right time, and a bunch of fixes for a single
> selftest that really *never* worked.
>
> Please pull,

Pulled, thanks.

Paolo

>         M.
>
> The following changes since commit 4d62121ce9b58ea23c8d62207cbc604e98ecdc0a:
>
>   KVM: arm64: vgic-debug: Avoid dereferencing NULL ITE pointer (2025-05-30 10:24:49 +0100)
>
> are available in the Git repository at:
>
>   git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git tags/kvmarm-fixes-6.16-2
>
> for you to fetch changes up to fad4cf944839da7f5c3376243aa353295c88f588:
>
>   KVM: arm64: selftests: Determine effective counter width in arch_timer_edge_cases (2025-06-05 14:28:44 +0100)
>
> ----------------------------------------------------------------
> KVM/arm64 fixes for 6.16, take #2
>
> - Rework of system register accessors for system registers that are
>   directly writen to memory, so that sanitisation of the in-memory
>   value happens at the correct time (after the read, or before the
>   write). For convenience, RMW-style accessors are also provided.
>
> - Multiple fixes for the so-called "arch-timer-edge-cases' selftest,
>   which was always broken.
>
> ----------------------------------------------------------------
> Marc Zyngier (4):
>       KVM: arm64: Add assignment-specific sysreg accessor
>       KVM: arm64: Add RMW specific sysreg accessor
>       KVM: arm64: Don't use __vcpu_sys_reg() to get the address of a sysreg
>       KVM: arm64: Make __vcpu_sys_reg() a pure rvalue operand
>
> Sebastian Ott (4):
>       KVM: arm64: selftests: Fix help text for arch_timer_edge_cases
>       KVM: arm64: selftests: Fix thread migration in arch_timer_edge_cases
>       KVM: arm64: selftests: Fix xVAL init in arch_timer_edge_cases
>       KVM: arm64: selftests: Determine effective counter width in arch_timer_edge_cases
>
>  arch/arm64/include/asm/kvm_host.h                  | 32 ++++++++++--
>  arch/arm64/kvm/arch_timer.c                        | 18 +++----
>  arch/arm64/kvm/debug.c                             |  4 +-
>  arch/arm64/kvm/fpsimd.c                            |  4 +-
>  arch/arm64/kvm/hyp/exception.c                     |  4 +-
>  arch/arm64/kvm/hyp/include/hyp/switch.h            |  4 +-
>  arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h         |  6 +--
>  arch/arm64/kvm/hyp/nvhe/hyp-main.c                 |  4 +-
>  arch/arm64/kvm/hyp/vhe/switch.c                    |  4 +-
>  arch/arm64/kvm/hyp/vhe/sysreg-sr.c                 | 48 ++++++++---------
>  arch/arm64/kvm/nested.c                            |  2 +-
>  arch/arm64/kvm/pmu-emul.c                          | 24 ++++-----
>  arch/arm64/kvm/sys_regs.c                          | 60 +++++++++++-----------
>  arch/arm64/kvm/sys_regs.h                          |  4 +-
>  arch/arm64/kvm/vgic/vgic-v3-nested.c               | 10 ++--
>  .../selftests/kvm/arm64/arch_timer_edge_cases.c    | 39 +++++++++-----
>  16 files changed, 151 insertions(+), 116 deletions(-)
>