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

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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>

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This commit is contained in:

Avi Kivity 2007-04-30 16:07:54 +03:00

parent e925c5ba93

commit e6adf28365

3 changed files with 62 additions and 45 deletions

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1

drivers/kvm/kvm.h

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1

drivers/kvm/kvm_main.c

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105

drivers/kvm/vmx.c

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