Patch "KVM: VMX: handle PML full VMEXIT that occurs during event delivery" has been added to the 4.4-stable tree

Patch "KVM: VMX: handle PML full VMEXIT that occurs during event delivery" has been added to the 4.4-stable tree

[gregkh]

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

    KVM: VMX: handle PML full VMEXIT that occurs during event delivery

to the 4.4-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-vmx-handle-pml-full-vmexit-that-occurs-during-event-delivery.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From b244c9fc251e14a083a1cbf04bef10bd99303a76 Mon Sep 17 00:00:00 2001
From: "Cao, Lei" <Lei.Cao@stratus.com>
Date: Fri, 15 Jul 2016 13:54:04 +0000
Subject: KVM: VMX: handle PML full VMEXIT that occurs during event delivery
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Cao, Lei <Lei.Cao@stratus.com>

commit b244c9fc251e14a083a1cbf04bef10bd99303a76 upstream.

With PML enabled, guest will shut down if a PML full VMEXIT occurs during
event delivery. According to Intel SDM 27.2.3, PML full VMEXIT can occur when
event is being delivered through IDT, so KVM should not exit to user space
with error. Instead, it should let EXIT_REASON_PML_FULL go through and the
event will be re-injected on the next VMENTRY.

Signed-off-by: Lei Cao <lei.cao@stratus.com>
Fixes: 843e4330573c ("KVM: VMX: Add PML support in VMX")
[Shortened the summary and Cc'd stable.]
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/kvm/vmx.c |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -8124,6 +8124,7 @@ static int vmx_handle_exit(struct kvm_vc
 	if ((vectoring_info & VECTORING_INFO_VALID_MASK) &&
 			(exit_reason != EXIT_REASON_EXCEPTION_NMI &&
 			exit_reason != EXIT_REASON_EPT_VIOLATION &&
+			exit_reason != EXIT_REASON_PML_FULL &&
 			exit_reason != EXIT_REASON_TASK_SWITCH)) {
 		vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
 		vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_DELIVERY_EV;


Patches currently in stable-queue which might be from Lei.Cao@stratus.com are

queue-4.4/kvm-vmx-handle-pml-full-vmexit-that-occurs-during-event-delivery.patch