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| author | Anthony Liguori <aliguori@us.ibm.com> | 2007-04-29 11:56:06 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2007-05-03 10:52:32 +0300 |
| commit | 94dfbdb3894eda2f673b70e20da2743c4a8d3968 (patch) | |
| tree | 74e7a4a31a72ed0e3753e9390189d2e8132ecf0e /lib | |
| parent | 2807696c3791d6dd1dcf20f022eaa2dc7615bc5d (diff) | |
| download | blackbird-op-linux-94dfbdb3894eda2f673b70e20da2743c4a8d3968.tar.gz blackbird-op-linux-94dfbdb3894eda2f673b70e20da2743c4a8d3968.zip | |
KVM: SVM: Only save/restore MSRs when needed
We only have to save/restore MSR_GS_BASE on every VMEXIT. The rest can be
saved/restored when we leave the VCPU. Since we don't emulate the DEBUGCTL
MSRs and the guest cannot write to them, we don't have to worry about
saving/restoring them at all.
This shaves a whopping 40% off raw vmexit costs on AMD.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions
