diff mbox

[v2,2/3] nvmx: mark ept single context invalidation as supported

Message ID 1470169957-12616-3-git-send-email-bsd@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Bandan Das Aug. 2, 2016, 8:32 p.m. UTC 
Commit 4b855078601f ("KVM: nVMX: Don't advertise single
context invalidation for invept") removed advertising
single context invalidation since the spec does not mandate it.
However, some hypervisors (such as ESX) require it to be present
before willing to use ept in a nested environment. Advertise it
and fallback to the global case.

Signed-off-by: Bandan Das <bsd@redhat.com>
---
 arch/x86/kvm/vmx.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)
diff mbox

Patch

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 1d5a3be..205c4bd 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -2717,12 +2717,8 @@  static void nested_vmx_setup_ctls_msrs(struct vcpu_vmx *vmx)
 			 VMX_EPTP_WB_BIT | VMX_EPT_2MB_PAGE_BIT |
 			 VMX_EPT_INVEPT_BIT;
 		vmx->nested.nested_vmx_ept_caps &= vmx_capability.ept;
-		/*
-		 * For nested guests, we don't do anything specific
-		 * for single context invalidation. Hence, only advertise
-		 * support for global context invalidation.
-		 */
-		vmx->nested.nested_vmx_ept_caps |= VMX_EPT_EXTENT_GLOBAL_BIT;
+		vmx->nested.nested_vmx_ept_caps |= VMX_EPT_EXTENT_GLOBAL_BIT |
+			VMX_EPT_EXTENT_CONTEXT_BIT;
 	} else
 		vmx->nested.nested_vmx_ept_caps = 0;
 
@@ -7457,12 +7453,16 @@  static int handle_invept(struct kvm_vcpu *vcpu)
 
 	switch (type) {
 	case VMX_EPT_EXTENT_GLOBAL:
+	/*
+	 * TODO: track mappings and invalidate
+	 * single context requests appropriately
+	 */
+	case VMX_EPT_EXTENT_CONTEXT:
 		kvm_mmu_sync_roots(vcpu);
 		kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
 		nested_vmx_succeed(vcpu);
 		break;
 	default:
-		/* Trap single context invalidation invept calls */
 		BUG_ON(1);
 		break;
 	}