Only copy the necessary parts of the vmcb save area on vmrun and save precious time. Signed-off-by: Joerg Roedel <joerg.roedel@xxxxxxx> --- arch/x86/kvm/svm.c | 26 ++++++++++++++++++++------ 1 files changed, 20 insertions(+), 6 deletions(-) diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 3e794f0..b85da3f 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -1688,6 +1688,7 @@ static int nested_svm_vmrun(struct vcpu_svm *svm, void *arg1, { struct vmcb *nested_vmcb = (struct vmcb *)arg1; struct vmcb *hsave = svm->hsave; + struct vmcb *vmcb = svm->vmcb; /* nested_vmcb is our indicator if nested SVM is activated */ svm->nested_vmcb = svm->vmcb->save.rax; @@ -1698,12 +1699,25 @@ static int nested_svm_vmrun(struct vcpu_svm *svm, void *arg1, /* Save the old vmcb, so we don't need to pick what we save, but can restore everything when a VMEXIT occurs */ - memcpy(hsave, svm->vmcb, sizeof(struct vmcb)); - /* We need to remember the original CR3 in the SPT case */ - if (!npt_enabled) - hsave->save.cr3 = svm->vcpu.arch.cr3; - hsave->save.cr4 = svm->vcpu.arch.cr4; - hsave->save.rip = svm->next_rip; + hsave->save.es = vmcb->save.es; + hsave->save.cs = vmcb->save.cs; + hsave->save.ss = vmcb->save.ss; + hsave->save.ds = vmcb->save.ds; + hsave->save.gdtr = vmcb->save.gdtr; + hsave->save.idtr = vmcb->save.idtr; + hsave->save.efer = svm->vcpu.arch.shadow_efer; + hsave->save.cr0 = svm->vcpu.arch.cr0; + hsave->save.cr4 = svm->vcpu.arch.cr4; + hsave->save.rflags = vmcb->save.rflags; + hsave->save.rip = svm->next_rip; + hsave->save.rsp = vmcb->save.rsp; + hsave->save.rax = vmcb->save.rax; + if (npt_enabled) + hsave->save.cr3 = vmcb->save.cr3; + else + hsave->save.cr3 = svm->vcpu.arch.cr3; + + hsave->control = vmcb->control; if (svm->vmcb->save.rflags & X86_EFLAGS_IF) svm->vcpu.arch.hflags |= HF_HIF_MASK; -- 1.6.3.3 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html