On 05/03/21 17:49, Marc Zyngier wrote:

Hi Paolo,

Here's the first batch of fixes for 5.12. We have a handful of low
level world-switch regressions, a page table walker fix, more PMU
tidying up, and a workaround for systems with creative firmware.

Note that this is based on -rc1 despite the breakage, as I didn't feel
like holding these patches until -rc2.

Please pull,

	M.

The following changes since commit fe07bfda2fb9cdef8a4d4008a409bb02f35f1bd8:

   Linux 5.12-rc1 (2021-02-28 16:05:19 -0800)

are available in the Git repository at:

   git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git tags/kvmarm-fixes-5.12-1

for you to fetch changes up to e85583b3f1fe62c9b371a3100c1c91af94005ca9:

   KVM: arm64: Fix range alignment when walking page tables (2021-03-04 09:54:12 +0000)

Hi Marc,

due to a severe data corruption bug in 5.12-rc1, Linus suggested not 
including 5.12-rc1 in trees to avoid it eating our filesystems 
unwittingly during future bisections.

Would it be a problem for you to rebase on top of your merge window pull 
request?  If there are conflicts, another possibility is for you to just 
send me the patch series.  I will handle all the topic branch juggling.

This will mean rewriting kvmarm.git's history, but it does seem to be 
the lesser (or the most future-proof) evil.

Thanks,

Paolo

----------------------------------------------------------------
KVM/arm64 fixes for 5.12, take #1

- Fix SPE context save/restore on nVHE
- Fix some subtle host context corruption on vcpu exit
- Fix panic handling on nVHE
- Prevent the hypervisor from accessing PMU registers when there is none
- Workaround broken firmwares advertising bogus GICv2 compatibility
- Fix Stage-2 unaligned range unmapping

----------------------------------------------------------------
Andrew Scull (1):
       KVM: arm64: Fix nVHE hyp panic host context restore

Jia He (1):
       KVM: arm64: Fix range alignment when walking page tables

Marc Zyngier (4):
       KVM: arm64: Turn kvm_arm_support_pmu_v3() into a static key
       KVM: arm64: Don't access PMSELR_EL0/PMUSERENR_EL0 when no PMU is available
       KVM: arm64: Rename __vgic_v3_get_ich_vtr_el2() to __vgic_v3_get_gic_config()
       KVM: arm64: Workaround firmware wrongly advertising GICv2-on-v3 compatibility

Suzuki K Poulose (1):
       KVM: arm64: nvhe: Save the SPE context early

Will Deacon (1):
       KVM: arm64: Avoid corrupting vCPU context register in guest exit

  arch/arm64/include/asm/kvm_asm.h        |  4 ++--
  arch/arm64/include/asm/kvm_hyp.h        |  8 ++++++-
  arch/arm64/kernel/image-vars.h          |  3 +++
  arch/arm64/kvm/hyp/entry.S              |  2 +-
  arch/arm64/kvm/hyp/include/hyp/switch.h |  9 +++++---
  arch/arm64/kvm/hyp/nvhe/debug-sr.c      | 12 ++++++++--
  arch/arm64/kvm/hyp/nvhe/host.S          | 15 +++++++------
  arch/arm64/kvm/hyp/nvhe/hyp-main.c      |  6 ++---
  arch/arm64/kvm/hyp/nvhe/switch.c        | 14 +++++++++---
  arch/arm64/kvm/hyp/pgtable.c            |  1 +
  arch/arm64/kvm/hyp/vgic-v3-sr.c         | 40 +++++++++++++++++++++++++++++++--
  arch/arm64/kvm/perf.c                   | 10 +++++++++
  arch/arm64/kvm/pmu-emul.c               | 10 ---------
  arch/arm64/kvm/vgic/vgic-v3.c           | 12 +++++++---
  include/kvm/arm_pmu.h                   |  9 ++++++--
  15 files changed, 116 insertions(+), 39 deletions(-)

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