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[3/4,v4] KVM: VMX: VMCLEAR/VMPTRLD usage changes.

Message ID D5AB6E638E5A3E4B8F4406B113A5A19A1E6E8853@shsmsx501.ccr.corp.intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Xu, Dongxiao May 11, 2010, 10:29 a.m. UTC 
None
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Patch

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 49b0850..c536b9d 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -62,6 +62,9 @@  module_param_named(unrestricted_guest,
 static int __read_mostly emulate_invalid_guest_state = 0;
 module_param(emulate_invalid_guest_state, bool, S_IRUGO);
 
+static int __read_mostly vmm_exclusive = 1;
+module_param(vmm_exclusive, bool, S_IRUGO);
+
 #define KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST				\
 	(X86_CR0_WP | X86_CR0_NE | X86_CR0_NW | X86_CR0_CD)
 #define KVM_GUEST_CR0_MASK						\
@@ -784,7 +787,7 @@  static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 	struct vcpu_vmx *vmx = to_vmx(vcpu);
 	u64 tsc_this, delta, new_offset;
 
-	if (vcpu->cpu != cpu)
+	if (vmm_exclusive && vcpu->cpu != cpu)
 		vcpu_clear(vmx);
 
 	if (per_cpu(current_vmcs, cpu) != vmx->vmcs) {
@@ -830,6 +833,8 @@  static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 static void vmx_vcpu_put(struct kvm_vcpu *vcpu)
 {
 	__vmx_load_host_state(to_vmx(vcpu));
+	if (!vmm_exclusive)
+		__vcpu_clear(to_vmx(vcpu));
 }
 
 static void vmx_fpu_activate(struct kvm_vcpu *vcpu)