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Commit 13c34e07 authored by Avi Kivity's avatar Avi Kivity
Browse files

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: default avatarAvi Kivity <avi@redhat.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent d4c90b00

arch/x86/kvm/svm.c

+5 −5
Original line number Diff line number Diff line
@@ -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;