| commit | 2345df8c555ecb92c0c36172c07d5ac321a92dc7 | |
| author | Avi Kivity <avi@qumranet.com> | |
| Tue, 17 Apr 2007 12:30:24 +0000 (17 15:30 +0300) | ||
| committer | Avi Kivity <avi@qumranet.com> | |
| Thu, 3 May 2007 07:52:29 +0000 (3 10:52 +0300) | ||
| tree | e61e3a6714d4fd06dbddb3d381494e505fd91ff0 | treesnapshot (tar.gz zip) |
| parent | c9047f533373e934b96d19d6a3d313ca2132fbe5 | commitdiff |
KVM: VMX: Reduce unnecessary saving of host msrs
THe automatically switched msrs are never changed on the host (with
the exception of MSR_KERNEL_GS_BASE) and thus there is no need to save
them on every vm entry.
This reduces vmexit latency by ~400 cycles on i386 and by ~900 cycles (10%)
on x86_64.
Signed-off-by: Avi Kivity <avi@qumranet.com>
THe automatically switched msrs are never changed on the host (with
the exception of MSR_KERNEL_GS_BASE) and thus there is no need to save
them on every vm entry.
This reduces vmexit latency by ~400 cycles on i386 and by ~900 cycles (10%)
on x86_64.
Signed-off-by: Avi Kivity <avi@qumranet.com>
| drivers/kvm/vmx.c | diffblobblamehistory |