[GIT PULL] KVM/arm64 fixes for 6.14, take #3
Marc Zyngier
maz at kernel.org
Thu Feb 20 09:44:06 PST 2025
Paolo,
Another week, another set of fixes.
This time around, we have a focus on MMU bugs, with one bug affecting
hVHE EL2 stage-1 and picking the ASID from the wrong register, while
the other affects VHE and allows it to run with a stale VMID value.
Either way, this is ugly.
Please pull,
M.
The following changes since commit 0ad2507d5d93f39619fc42372c347d6006b64319:
Linux 6.14-rc3 (2025-02-16 14:02:44 -0800)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git tags/kvmarm-fixes-6.14-3
for you to fetch changes up to fa808ed4e199ed17d878eb75b110bda30dd52434:
KVM: arm64: Ensure a VMID is allocated before programming VTTBR_EL2 (2025-02-20 16:29:28 +0000)
----------------------------------------------------------------
KVM/arm64 fixes for 6.14, take #3
- Fix TCR_EL2 configuration to not use the ASID in TTBR1_EL2
and not mess-up T1SZ/PS by using the HCR_EL2.E2H==0 layout.
- Bring back the VMID allocation to the vcpu_load phase, ensuring
that we only setup VTTBR_EL2 once on VHE. This cures an ugly
race that would lead to running with an unallocated VMID.
----------------------------------------------------------------
Oliver Upton (1):
KVM: arm64: Ensure a VMID is allocated before programming VTTBR_EL2
Will Deacon (1):
KVM: arm64: Fix tcr_el2 initialisation in hVHE mode
arch/arm64/include/asm/kvm_arm.h | 2 +-
arch/arm64/include/asm/kvm_host.h | 2 +-
arch/arm64/kvm/arm.c | 37 +++++++++++++++++--------------------
arch/arm64/kvm/vmid.c | 11 +++--------
4 files changed, 22 insertions(+), 30 deletions(-)
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