| commit | e38aea3e9330624d19a233c05f3e69c57519edd5 | [log] [tgz] |
|---|---|---|
| author | Avi Kivity <avi@qumranet.com> | Thu Apr 19 13:22:48 2007 +0300 |
| committer | Avi Kivity <avi@qumranet.com> | Thu May 03 10:52:30 2007 +0300 |
| tree | 68daabdafa535043ab68d01b80642fbf6a4c0977 | |
| parent | 2345df8c555ecb92c0c36172c07d5ac321a92dc7 [diff] |
KVM: VMX: Don't switch 64-bit msrs for 32-bit guests Some msrs are only used by x86_64 instructions, and are therefore not needed when the guest is legacy mode. By not bothering to switch them, we reduce vmexit latency by 2400 cycles (from about 8800) when running a 32-bt guest on a 64-bit host. Signed-off-by: Avi Kivity <avi@qumranet.com>