[Xen-devel] [PATCH v1] vmx: set 'SN' bit for the runstate transition from blocked to runnable

["Xuquan (Quan Xu)" <xuquan8@xxxxxxxxxx>]

>From 946e7589e5a875574c7567a91943d47c38218a6f Mon Sep 17 00:00:00 2001
From: Quan Xu <xuquan8@xxxxxxxxxx>
Date: Fri, 14 Apr 2017 02:11:30 +0800
Subject: [PATCH v1] vmx: set 'SN' bit for the runstate transition from blocked
 to runnable

set 'SN' bit of posted-interrupt descriptor when the runstate transition
is from blocked to runnable (SN bit of posted-interrupt descriptor is still
set to a blocked vCPU), otherwise PI notification event may be sent to a
non-running vCPU.

Signed-off-by: Quan Xu <xuquan8@xxxxxxxxxx>
---
 xen/arch/x86/hvm/vmx/vmx.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index 9c5a388..956f104 100644
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -142,9 +142,6 @@ static void vmx_pi_switch_from(struct vcpu *v)
 {
     struct pi_desc *pi_desc = &v->arch.hvm_vmx.pi_desc;

-    if ( test_bit(_VPF_blocked, &v->pause_flags) )
-        return;
-
     pi_set_sn(pi_desc);
 }

--
1.8.3.1

Attachment: 0001-vmx-set-SN-bit-for-the-runstate-transition-from-bloc.patch
Description: 0001-vmx-set-SN-bit-for-the-runstate-transition-from-bloc.patch

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