Re: [GIT PULL] KVM/arm64 fixes for 7.0, take #2

Paolo Bonzini
2026-03-11T16:58:24Z

On Fri, Mar 6, 2026 at 12:23 PM Marc Zyngier <maz@kernel.org> wrote:
>
> Paolo,
>
> Here's the second set of fixes for 7.0. The only interesting fix is
> one affecting pKVM and preventing the host from making forward
> progress when a memblock is not page-aligned.
>
> The rest is a bunch of low-severity fixes affecting the page-table
> code, some of which Fuad has promised to start cleaning up!
>
> Please pull,

Pulled, thanks.

Paolo

>
> M.
>
> The following changes since commit 11439c4635edd669ae435eec308f4ab8a0804808:
>
> Linux 7.0-rc2 (2026-03-01 15:39:31 -0800)
>
> are available in the Git repository at:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git tags/kvmarm-fixes-7.0-2
>
> for you to fetch changes up to 3599c714c08c324f0fcfa392bfb857c92c575400:
>
> KVM: arm64: Remove the redundant ISB in __kvm_at_s1e2() (2026-03-06 10:42:21 +0000)
>
> ----------------------------------------------------------------
> KVM/arm64 fixes for 7.0, take #2
>
> - Fix a couple of low-severity bugs in our S2 fault handling path,
> affecting the recently introduced LS64 handling and the even more
> esoteric handling of hwpoison in a nested context
>
> - Address yet another syzkaller finding in the vgic initialisation,
> were we would end-up destroying an uninitialised vgic, with nasty
> consequences
>
> - Address an annoying case of pKVM failing to boot when some of the
> memblock regions that the host is faulting in are not page-aligned
>
> - Inject some sanity in the NV stage-2 walker by checking the limits
> against the advertised PA size, and correctly report the resulting
> faults
>
> - Drop an unnecessary ISB when emulating an EL2 S1 address translation
>
> ----------------------------------------------------------------
> Fuad Tabba (2):
> KVM: arm64: Fix page leak in user_mem_abort() on atomic fault
> KVM: arm64: Fix vma_shift staleness on nested hwpoison path
>
> Marc Zyngier (2):
> KVM: arm64: Eagerly init vgic dist/redist on vgic creation
> KVM: arm64: pkvm: Fallback to level-3 mapping on host stage-2 fault
>
> Zenghui Yu (Huawei) (4):
> KVM: arm64: nv: Check S2 limits based on implemented PA size
> KVM: arm64: nv: Report addrsz fault at level 0 with a bad VTTBR.BADDR
> KVM: arm64: nv: Inject a SEA if failed to read the descriptor
> KVM: arm64: Remove the redundant ISB in __kvm_at_s1e2()
>
> arch/arm64/kvm/at.c | 2 --
> arch/arm64/kvm/hyp/nvhe/mem_protect.c | 2 +-
> arch/arm64/kvm/mmu.c | 14 +++++++++-----
> arch/arm64/kvm/nested.c | 27 ++++++++++++++++-----------
> arch/arm64/kvm/vgic/vgic-init.c | 32 ++++++++++++++++----------------
> 5 files changed, 42 insertions(+), 35 deletions(-)
>