tree 75cdf0f0635a32e9337a4c2e3e5f332cf932f902
parent e925c5ba9380dad5fdf1d0a9d9199ac43be74c6a
author Avi Kivity <avi@qumranet.com> 1177938474 +0300
committer Avi Kivity <avi@qumranet.com> 1184576738 +0300

KVM: Avoid saving and restoring some host CPU state on lightweight vmexit

Many msrs and the like will only be used by the host if we schedule() or
return to userspace.  Therefore, we avoid saving them if we handle the
exit within the kernel, and if a reschedule is not requested.

Based on a patch from Eddie Dong <eddie.dong@intel.com> with a couple of
fixes by me.

Signed-off-by: Yaozu(Eddie) Dong <eddie.dong@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>