Patch "KVM: nVMX: Fix EPT switching advertising" has been added to the 4.14-stable tree

This is a note to let you know that I've just added the patch titled

KVM: nVMX: Fix EPT switching advertising

to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
kvm-nvmx-fix-ept-switching-advertising.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Wanpeng Li <[email protected]>
Date: Thu, 19 Oct 2017 07:00:34 +0800
Subject: KVM: nVMX: Fix EPT switching advertising

From: Wanpeng Li <[email protected]>

[ Upstream commit 575b3a2cb439b03fd603ea77c73c76f3ed237596 ]

I can use vmxcap tool to observe "EPTP Switching yes" even if EPT is not
exposed to L1.

EPT switching is advertised unconditionally since it is emulated, however, it can be treated as an extended feature for EPT and it should not be advertised if EPT itself is not exposed. This patch fixes it.

---
 arch/x86/kvm/vmx.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

@@ -2845,8 +2845,9 @@ static void nested_vmx_setup_ctls_msrs(s
 		 * Advertise EPTP switching unconditionally
 		 * since we emulate it
 		 */
-		vmx->nested.nested_vmx_vmfunc_controls =
-			VMX_VMFUNC_EPTP_SWITCHING;
+		if (enable_ept)
+			vmx->nested.nested_vmx_vmfunc_controls =
+				VMX_VMFUNC_EPTP_SWITCHING;
 	}
 
 	/*

Patches currently in stable-queue which might be from [email protected] are

queue-4.14/kvm-nvmx-fix-ept-switching-advertising.patch