This is a note to let you know that I've just added the patch titled
KVM: nVMX: Disable unrestricted mode if ept=0
to the 3.18-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-disable-unrestricted-mode-if-ept-0.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 78051e3b7e35722ad3f31dd611f1b34770bddab8 Mon Sep 17 00:00:00 2001
From: Bandan Das <bsd@xxxxxxxxxx>
Date: Sat, 6 Dec 2014 20:32:16 +0530
Subject: KVM: nVMX: Disable unrestricted mode if ept=0
From: Bandan Das <bsd@xxxxxxxxxx>
commit 78051e3b7e35722ad3f31dd611f1b34770bddab8 upstream.
If L0 has disabled EPT, don't advertise unrestricted
mode at all since it depends on EPT to run real mode code.
Fixes: 92fbc7b195b824e201d9f06f2b93105f72384d65
Reviewed-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
Signed-off-by: Bandan Das <bsd@xxxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kvm/vmx.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -2377,12 +2377,12 @@ static __init void nested_vmx_setup_ctls
nested_vmx_secondary_ctls_low = 0;
nested_vmx_secondary_ctls_high &=
SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES |
- SECONDARY_EXEC_UNRESTRICTED_GUEST |
SECONDARY_EXEC_WBINVD_EXITING;
if (enable_ept) {
/* nested EPT: emulate EPT also to L1 */
- nested_vmx_secondary_ctls_high |= SECONDARY_EXEC_ENABLE_EPT;
+ nested_vmx_secondary_ctls_high |= SECONDARY_EXEC_ENABLE_EPT |
+ SECONDARY_EXEC_UNRESTRICTED_GUEST;
nested_vmx_ept_caps = VMX_EPT_PAGE_WALK_4_BIT |
VMX_EPTP_WB_BIT | VMX_EPT_2MB_PAGE_BIT |
VMX_EPT_INVEPT_BIT;
Patches currently in stable-queue which might be from bsd@xxxxxxxxxx are
queue-3.18/kvm-nvmx-disable-unrestricted-mode-if-ept-0.patch
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