KVM: SVM: enable LBR virtualization

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This patch implements the Last Branch Record Virtualization (LBRV) feature of
the AMD Barcelona and Phenom processors into the kvm-amd module. It will only
be enabled if the guest enables last branch recording in the DEBUG_CTL MSR. So
there is no increased world switch overhead when the guest doesn't use these
MSRs.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Markus Rechberger <markus.rechberger@amd.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

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Joerg Roedel 2008-02-13 18:58:47 +01:00 • committed by Avi Kivity

parent f65c229c3e

commit 24e09cbf48

1 changed files with 37 additions and 2 deletions

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39

arch/x86/kvm/svm.c

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