linux-kernel - [PATCH 3/3] Register native mce handler as vMCE bounce back point

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Message-ID: <DE8DF0795D48FD4CA783C40EC82923351FFB7C@SHSMSX101.ccr.corp.intel.com>
Date:	Thu, 31 May 2012 17:33:49 +0000
From:	"Liu, Jinsong" <jinsong.liu@...el.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
CC:	Borislav Petkov <bp@...64.org>, "Luck, Tony" <tony.luck@...el.com>,
	"'xen-devel@...ts.xensource.com'" <xen-devel@...ts.xensource.com>,
	"'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>
Subject: [PATCH 3/3] Register native mce handler as vMCE bounce back point

>From ca1f8a2347eb34acdc7c54b805c78a982a0a590d Mon Sep 17 00:00:00 2001
From: Liu, Jinsong <jinsong.liu@...el.com>
Date: Fri, 1 Jun 2012 08:41:00 +0800
Subject: [PATCH 3/3] Register native mce handler as vMCE bounce back point

When xen hypervisor inject vMCE to guest, use native mce handler to handle it

Signed-off-by: Ke, Liping <liping.ke@...el.com>
Signed-off-by: Jiang, Yunhong <yunhong.jiang@...el.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
Signed-off-by: Liu, Jinsong <jinsong.liu@...el.com>
---
 arch/x86/xen/enlighten.c |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index ff2d00e..0cb12dd 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -618,8 +618,8 @@ static int cvt_gate_to_trap(int vector, const gate_desc *val,
 	/*
 	 * Look for known traps using IST, and substitute them
 	 * appropriately.  The debugger ones are the only ones we care
-	 * about.  Xen will handle faults like double_fault and
-	 * machine_check, so we should never see them.  Warn if
+	 * about.  Xen will handle faults like double_fault,
+	 * so we should never see them.  Warn if
 	 * there's an unexpected IST-using fault handler.
 	 */
 	if (addr == (unsigned long)debug)
@@ -634,7 +634,11 @@ static int cvt_gate_to_trap(int vector, const gate_desc *val,
 		return 0;
 #ifdef CONFIG_X86_MCE
 	} else if (addr == (unsigned long)machine_check) {
-		return 0;
+		/*
+		 * when xen hyeprvisor inject vMCE to guest,
+		 * use native mce handler to handle it
+		 */
+		;
 #endif
 	} else {
 		/* Some other trap using IST? */
-- 
1.7.1

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