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| author |   Paolo Bonzini <pbonzini@redhat.com> | 2020-05-05 09:40:46 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-05-06 06:51:36 -0400 |
| commit | 139f7425fdf54f054463e7524b9f54c41af8407f (patch) | |
| tree | c6a22176977632b38d79fe96aac1828070f53fb1 /tools/testing/selftests/kvm/lib | |
| parent | KVM: VMX: Explicitly clear RFLAGS.CF and RFLAGS.ZF in VM-Exit RSB path (diff) | |
| download | linux-dev-139f7425fdf54f054463e7524b9f54c41af8407f.tar.xz linux-dev-139f7425fdf54f054463e7524b9f54c41af8407f.zip | |
kvm: x86: Use KVM CPU capabilities to determine CR4 reserved bits
Using CPUID data can be useful for the processor compatibility
check, but that's it. Using it to compute guest-reserved bits
can have both false positives (such as LA57 and UMIP which we
are already handling) and false negatives: in particular, with
this patch we don't allow anymore a KVM guest to set CR4.PKE
when CR4.PKE is clear on the host.
Fixes: b9dd21e104bc ("KVM: x86: simplify handling of PKRU")
Reported-by: Jim Mattson <jmattson@google.com>
Tested-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/testing/selftests/kvm/lib')
0 files changed, 0 insertions, 0 deletions