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| author | Kyle Huey <me@kylehuey.com> | 2017-03-20 09:16:28 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-04-21 12:50:06 +0200 |
| commit | db2336a80489e7c3c7728cefd9be58fac5ecfb39 (patch) | |
| tree | 2a462ecee35d68dea1b931ba5ee226933e663cd0 /Documentation/virtual | |
| parent | Merge tag 'kvm-s390-next-4.12-2' of git://git.kernel.org/pub/scm/linux/kernel... (diff) | |
| download | linux-db2336a80489e7c3c7728cefd9be58fac5ecfb39.tar.xz linux-db2336a80489e7c3c7728cefd9be58fac5ecfb39.zip | |
KVM: x86: virtualize cpuid faulting
Hardware support for faulting on the cpuid instruction is not required to
emulate it, because cpuid triggers a VM exit anyways. KVM handles the relevant
MSRs (MSR_PLATFORM_INFO and MSR_MISC_FEATURES_ENABLE) and upon a
cpuid-induced VM exit checks the cpuid faulting state and the CPL.
kvm_require_cpl is even kind enough to inject the GP fault for us.
Signed-off-by: Kyle Huey <khuey@kylehuey.com>
Reviewed-by: David Matlack <dmatlack@google.com>
[Return "1" from kvm_emulate_cpuid, it's not void. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'Documentation/virtual')
0 files changed, 0 insertions, 0 deletions