diff options
| author | Joerg Roedel | 2009-08-07 11:49:30 +0200 |
|---|---|---|
| committer | Avi Kivity | 2009-09-10 07:33:23 +0200 |
| commit | defbba5660fb9fcad186bd799a635e52994a4d1a (patch) | |
| tree | 90be523b529f4d7f99fe05497385cb59fc1dbfd9 /arch/x86/kvm/svm.c | |
| parent | KVM: SVM: optimize nested #vmexit (diff) | |
| download | kernel-qcow2-linux-defbba5660fb9fcad186bd799a635e52994a4d1a.tar.gz kernel-qcow2-linux-defbba5660fb9fcad186bd799a635e52994a4d1a.tar.xz kernel-qcow2-linux-defbba5660fb9fcad186bd799a635e52994a4d1a.zip | |
KVM: SVM: optimize nested vmrun
Only copy the necessary parts of the vmcb save area on vmrun and save
precious time.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Acked-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/svm.c')
| -rw-r--r-- | arch/x86/kvm/svm.c | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 2f5f2236f2a2..f11f88005c29 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -1681,6 +1681,7 @@ 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; @@ -1691,12 +1692,25 @@ 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; @@ -1721,7 +1735,7 @@ static int nested_svm_vmrun(struct vcpu_svm *svm, void *arg1, kvm_set_cr3(&svm->vcpu, nested_vmcb->save.cr3); kvm_mmu_reset_context(&svm->vcpu); } - svm->vmcb->save.cr2 = nested_vmcb->save.cr2; + svm->vmcb->save.cr2 = svm->vcpu.arch.cr2 = nested_vmcb->save.cr2; kvm_register_write(&svm->vcpu, VCPU_REGS_RAX, nested_vmcb->save.rax); kvm_register_write(&svm->vcpu, VCPU_REGS_RSP, nested_vmcb->save.rsp); kvm_register_write(&svm->vcpu, VCPU_REGS_RIP, nested_vmcb->save.rip); |