Xen devel - May 2012 - [PATCH 3/3] Register native mce handler as vMCE bounce back point

On Thu, May 31, 2012 at 05:33:49PM +0000, Liu, Jinsong
wrote:
> >From ca1f8a2347eb34acdc7c54b805c78a982a0a590d Mon Sep 17 00:00:00 2001
> From: Liu, Jinsong <jinsong.liu@intel.com>
> Date: Fri, 1 Jun 2012 08:41:00 +0800
> Subject: [PATCH 3/3] Register native mce handler as vMCE bounce back point
You need to have ''xen:'' in front of
''register''
> 
> When xen hypervisor inject vMCE to guest, use native mce handler to handle
it
And is that still OK?
> 
> Signed-off-by: Ke, Liping <liping.ke@intel.com>
> Signed-off-by: Jiang, Yunhong <yunhong.jiang@intel.com>
> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
> Signed-off-by: Liu, Jinsong <jinsong.liu@intel.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,
<sigh> Pls run a spell checker.
> +		 * use native mce handler to handle it
> +		 */
> +		;
>  #endif
>  	} else {
>  		/* Some other trap using IST? */
> -- 
> 1.7.1

From ca1f8a2347eb34acdc7c54b805c78a982a0a590d Mon Sep 17 00:00:00 2001
From: Liu, Jinsong <jinsong.liu@intel.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@intel.com>
Signed-off-by: Jiang, Yunhong <yunhong.jiang@intel.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Liu, Jinsong <jinsong.liu@intel.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