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KVM/arm64 fixes for 7.1, take #2

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- Add the pKVM side of the workaround for ARM's erratum 4193714, provided
   that the EL3 firmware does its part of the job. KVM will refuse to
   initialise otherwise.
 
 - Correctly handle 52bit VAs for guest EL2 stage-1 translations when
   running under NV with E2H==0.
 
 - Correctly deal with permission faults in guest_memfd memslots.
 
 - Fix the steal-time selftest after the infrastructure was reworked.
 
 - Make sure the host cannot pass a non-sensical clock update to the
   EL2 tracing infrastructure.
 
 - Appoint Steffen Eiden as a reviewer in anticipation of the KVM/s390
   ability to run arm64 guests, which will inevitably lead to arm64
   code being directly used on s390.
 
 - Make sure that EL2 is configured with both exception entry and exit
   being Context Synchronization Events.
 
 - Handle the current vcpu being NULL on EL2 panic.
 
 - Fix the selftest_vcpu memcache being empty at the point of donation or
   sharing.
 
 - Check that the memcache has enough capacity before engaging on the
   share/donate path.
 
 - Fix __deactivate_fgt() to use its parameter rather than a variable
   in the macro context.
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Merge tag 'kvmarm-fixes-7.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 fixes for 7.1, take #2

- Add the pKVM side of the workaround for ARM's erratum 4193714, provided
  that the EL3 firmware does its part of the job. KVM will refuse to
  initialise otherwise.

- Correctly handle 52bit VAs for guest EL2 stage-1 translations when
  running under NV with E2H==0.

- Correctly deal with permission faults in guest_memfd memslots.

- Fix the steal-time selftest after the infrastructure was reworked.

- Make sure the host cannot pass a non-sensical clock update to the
  EL2 tracing infrastructure.

- Appoint Steffen Eiden as a reviewer in anticipation of the KVM/s390
  ability to run arm64 guests, which will inevitably lead to arm64
  code being directly used on s390.

- Make sure that EL2 is configured with both exception entry and exit
  being Context Synchronization Events.

- Handle the current vcpu being NULL on EL2 panic.

- Fix the selftest_vcpu memcache being empty at the point of donation or
  sharing.

- Check that the memcache has enough capacity before engaging on the
  share/donate path.

- Fix __deactivate_fgt() to use its parameter rather than a variable
  in the macro context.
This commit is contained in:
Paolo Bonzini 2026-05-12 22:19:20 +02:00
commit 4a9ee4fc79
12 changed files with 120 additions and 13 deletions
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