kvm: vmx: advertise support for ept execute only

MMU now knows about execute only mappings, so
advertise the feature to L1 hypervisors

Signed-off-by: Bandan Das <bsd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index bd7d60f..729e5f6 100644 (file)
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -2794,6 +2794,9 @@ 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