[GIT,PULL] KVM/arm64 fixes for 6.14, take #3

Pull-request

git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git tags/kvmarm-fixes-6.14-3

Message

Marc Zyngier Feb. 20, 2025, 5:44 p.m. UTC

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(-)