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| author | Bandan Das <bsd@redhat.com> | 2015-06-11 02:05:33 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-07-03 19:48:09 -0700 |
| commit | ea0d66be1c27f55825a80d01ad1ff72f6e005c29 (patch) | |
| tree | a6b5f1a327416e24b63c4c3598a814acd3a1a741 /drivers | |
| parent | 4cae4bbc1a8f5258a986801d72678752f9075a64 (diff) | |
| download | lwn-ea0d66be1c27f55825a80d01ad1ff72f6e005c29.tar.gz lwn-ea0d66be1c27f55825a80d01ad1ff72f6e005c29.zip | |
KVM: nSVM: Check for NRIPS support before updating control field
commit f104765b4f81fd74d69e0eb161e89096deade2db upstream.
If hardware doesn't support DecodeAssist - a feature that provides
more information about the intercept in the VMCB, KVM decodes the
instruction and then updates the next_rip vmcb control field.
However, NRIP support itself depends on cpuid Fn8000_000A_EDX[NRIPS].
Since skip_emulated_instruction() doesn't verify nrip support
before accepting control.next_rip as valid, avoid writing this
field if support isn't present.
Signed-off-by: Bandan Das <bsd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions