[PATCH 1/4] KVM: SVM: Move guest register save out of interrupts disabled section

[Avi Kivity <avi@redhat.com>]

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>
---
 arch/x86/kvm/svm.c |   10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 2e57450..9d703e2 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -3412,11 +3412,6 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu)
 #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);
 	kvm_load_ldt(ldt_selector);
 	loadsegment(fs, fs_selector);
@@ -3433,6 +3428,11 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu)
 
 	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);
 
 	svm->next_rip = 0;
-- 
1.7.3.1