From: Marcelo Tosatti <mtosatti@redhat.com>
Date: Mon, 26 Oct 2009 18:48:33 +0000 (-0200)
Subject: KVM: VMX: move CR3/PDPTR update to vmx_set_cr3
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=00def0e4d42275b820035598486e3f2095c50216;p=users%2Fdwmw2%2Flinux.git

KVM: VMX: move CR3/PDPTR update to vmx_set_cr3

GUEST_CR3 is updated via kvm_set_cr3 whenever CR3 is modified from
outside guest context. Similarly pdptrs are updated via load_pdptrs.

Let kvm_set_cr3 perform the update, removing it from the vcpu_run
fast path.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Acked-by: Acked-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
---

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index a1976c9d67a5e..85f97d1fe3ec6 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -1732,6 +1732,7 @@ static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
 		vmcs_write64(EPT_POINTER, eptp);
 		guest_cr3 = is_paging(vcpu) ? vcpu->arch.cr3 :
 			vcpu->kvm->arch.ept_identity_map_addr;
+		ept_load_pdptrs(vcpu);
 	}
 
 	vmx_flush_tlb(vcpu);
@@ -3620,10 +3621,6 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu)
 {
 	struct vcpu_vmx *vmx = to_vmx(vcpu);
 
-	if (enable_ept && is_paging(vcpu)) {
-		vmcs_writel(GUEST_CR3, vcpu->arch.cr3);
-		ept_load_pdptrs(vcpu);
-	}
 	/* Record the guest's net vcpu time for enforced NMI injections. */
 	if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked))
 		vmx->entry_time = ktime_get();
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 2ef390627865b..1b27fc8b03e2b 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4593,8 +4593,10 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 
 	mmu_reset_needed |= vcpu->arch.cr4 != sregs->cr4;
 	kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
-	if (!is_long_mode(vcpu) && is_pae(vcpu))
+	if (!is_long_mode(vcpu) && is_pae(vcpu)) {
 		load_pdptrs(vcpu, vcpu->arch.cr3);
+		mmu_reset_needed = 1;
+	}
 
 	if (mmu_reset_needed)
 		kvm_mmu_reset_context(vcpu);