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| author | Paolo Bonzini <[email protected]> | 2020-09-29 12:31:32 +0000 |
|---|---|---|
| committer | Paolo Bonzini <[email protected]> | 2020-10-03 09:07:40 +0000 |
| commit | b502e6ecdc3b6d381bd72c5f879bc1e00d6fe7db (patch) | |
| tree | ee7378f38763f315a253ef615ea26cc163c41bed /fs/btrfs/dev-replace.c | |
| parent | KVM: SVM: Add a dedicated INVD intercept routine (diff) | |
| download | kernel-b502e6ecdc3b6d381bd72c5f879bc1e00d6fe7db.tar.gz kernel-b502e6ecdc3b6d381bd72c5f879bc1e00d6fe7db.zip | |
KVM: VMX: update PFEC_MASK/PFEC_MATCH together with PF intercept
The PFEC_MASK and PFEC_MATCH fields in the VMCS reverse the meaning of
the #PF intercept bit in the exception bitmap when they do not match.
This means that, if PFEC_MASK and/or PFEC_MATCH are set, the
hypervisor can get a vmexit for #PF exceptions even when the
corresponding bit is clear in the exception bitmap.
This is unexpected and is promptly detected by a WARN_ON_ONCE.
To fix it, reset PFEC_MASK and PFEC_MATCH when the #PF intercept
is disabled (as is common with enable_ept && !allow_smaller_maxphyaddr).
Reported-by: Qian Cai <[email protected]>>
Reported-by: Naresh Kamboju <[email protected]>
Tested-by: Naresh Kamboju <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
Diffstat (limited to 'fs/btrfs/dev-replace.c')
0 files changed, 0 insertions, 0 deletions