| commit | 4d56c8a787aefb2e3fc4ac4be966db96c14d1ad8 | [log] [tgz] |
|---|---|---|
| author | Avi Kivity <avi@qumranet.com> | Thu Apr 19 14:28:44 2007 +0300 |
| committer | Avi Kivity <avi@qumranet.com> | Thu May 03 10:52:30 2007 +0300 |
| tree | 99db1bc065832b2685bd5edb75cd7c1019011ead | |
| parent | 35cc7f971188366f5a5c0d5da1456bb38cef5da9 [diff] |
KVM: VMX: Only save/restore MSR_K6_STAR if necessary Intel hosts only support syscall/sysret in long more (and only if efer.sce is enabled), so only reload the related MSR_K6_STAR if the guest will actually be able to use it. This reduces vmexit cost by about 500 cycles (6400 -> 5870) on my setup. Signed-off-by: Avi Kivity <avi@qumranet.com>