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KVM: SVM: Move guest register save out of interrupts disabled section 

Saving guest registers is just a memory copy, and does not need to be in the
critical section.  Move outside the critical section to improve latency a
bit.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Avi Kivity 2010-10-21 12:20:31 +02:00
parent d4c90b0043
commit 13c34e073b
1 changed files with 5 additions and 5 deletions
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10
arch/x86/kvm/svm.c
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@ -3412,11 +3412,6 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu)
#endif #endif
); );
vcpu->arch.cr2 = svm->vmcb->save.cr2;
vcpu->arch.regs[VCPU_REGS_RAX] = svm->vmcb->save.rax;
vcpu->arch.regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp;
vcpu->arch.regs[VCPU_REGS_RIP] = svm->vmcb->save.rip;
load_host_msrs(vcpu); load_host_msrs(vcpu);
kvm_load_ldt(ldt_selector); kvm_load_ldt(ldt_selector);
loadsegment(fs, fs_selector); loadsegment(fs, fs_selector);
@ -3433,6 +3428,11 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu)
stgi(); stgi();
vcpu->arch.cr2 = svm->vmcb->save.cr2;
vcpu->arch.regs[VCPU_REGS_RAX] = svm->vmcb->save.rax;
vcpu->arch.regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp;
vcpu->arch.regs[VCPU_REGS_RIP] = svm->vmcb->save.rip;
sync_cr8_to_lapic(vcpu); sync_cr8_to_lapic(vcpu);
svm->next_rip = 0; svm->next_rip = 0;