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Message-Id: <1467088360-10186-6-git-send-email-bsd@redhat.com>
Date: Tue, 28 Jun 2016 00:32:40 -0400
From: Bandan Das <bsd@...hat.com>
To: kvm@...r.kernel.org
Cc: pbonzini@...hat.com, guangrong.xiao@...ux.intel.com,
linux-kernel@...r.kernel.org
Subject: [PATCH 5/5] nvmx: advertise support for ept execute only
KVM MMU now knows about execute only mappings, so
advertise the feature to L1 hypervisors
Signed-off-by: Bandan Das <bsd@...hat.com>
---
arch/x86/kvm/vmx.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 417debc..0fe61a3 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
--
2.5.5
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