diff mbox

[v2,5/5] vmx: advertise support for ept execute only

Message ID 1468361932-16580-6-git-send-email-bsd@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Bandan Das July 12, 2016, 10:18 p.m. UTC 
MMU now knows about execute only mappings, so
advertise the feature to L1 hypervisors

Signed-off-by: Bandan Das <bsd@redhat.com>
---
 arch/x86/kvm/vmx.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox

Patch

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index f73b5dc..2c49355f 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -2717,6 +2717,9 @@  static void nested_vmx_setup_ctls_msrs(struct vcpu_vmx *vmx)
 		vmx->nested.nested_vmx_ept_caps = VMX_EPT_PAGE_WALK_4_BIT |
 			 VMX_EPTP_WB_BIT | VMX_EPT_2MB_PAGE_BIT |
 			 VMX_EPT_INVEPT_BIT;
+		if (cpu_has_vmx_ept_execute_only())
+			vmx->nested.nested_vmx_ept_caps |=
+				VMX_EPT_EXECUTE_ONLY_BIT;
 		vmx->nested.nested_vmx_ept_caps &= vmx_capability.ept;
 		/*
 		 * For nested guests, we don't do anything specific