From: "Egger, Christoph" <chegger@amazon.de>
To: Wei Liu <wei.liu2@citrix.com>, Haozhong Zhang <haozhong.zhang@intel.com>
Cc: Keir Fraser <keir@xen.org>,
Ian Campbell <ian.campbell@citrix.com>,
Stefano Stabellini <stefano.stabellini@eu.citrix.com>,
Liu Jinsong <jinsong.liu@alibaba-inc.com>,
Ian Jackson <ian.jackson@eu.citrix.com>,
xen-devel@lists.xen.org, Jan Beulich <jbeulich@suse.com>,
Andrew Cooper <andrew.cooper3@citrix.com>
Subject: Re: [PATCH 4/4] tools/xen-mceinj: Pass in GPA when injecting through MSR_MCI_ADDR
Date: Tue, 15 Sep 2015 12:08:32 +0200 [thread overview]
Message-ID: <55F7EE20.80504@amazon.de> (raw)
In-Reply-To: <20150915100209.GJ2294@zion.uk.xensource.com>
On 2015/09/15 12:02, Wei Liu wrote:
> I don't know this piece of code so my comments might be stupid.
>
> On Tue, Sep 15, 2015 at 04:29:40PM +0800, Haozhong Zhang wrote:
>> This patch removes the address translation in xen-mceinj which
>> translates the guest physical address passed-in through the argument
>> of '-p' to the host machine address.
>>
>
> Is the translation functionality broken or superseded by hardware
> support? What is the reason for removing this piece of (working?) code?
Neither nor. The translation done in xen-mceinj.c doesn't deal with
memory addresses above 4G. The fix is to let the hypervisor do the
translation.
Christoph
>
> (I haven't looked at the code)
>
> Wei.
>
Amazon Development Center Germany GmbH
Krausenstr. 38
10117 Berlin
Geschaeftsfuehrer: Dr. Ralf Herbrich, Christian Schlaeger
Ust-ID: DE289237879
Eingetragen am Amtsgericht Charlottenburg HRB 149173 B
next prev parent reply other threads:[~2015-09-15 10:08 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-15 8:29 [PATCH 0/4] Fix tools/xen-mceinj to handle >=4GB guest memory Haozhong Zhang
2015-09-15 8:29 ` [PATCH 1/4] x86/mce: Fix code style Haozhong Zhang
2015-09-15 8:47 ` Egger, Christoph
2015-09-15 13:13 ` Jan Beulich
2015-09-15 13:19 ` Haozhong Zhang
2015-09-15 8:29 ` [PATCH 2/4] tools/mceinject: " Haozhong Zhang
2015-09-15 8:48 ` Egger, Christoph
2015-09-15 10:15 ` Ian Campbell
2015-09-15 13:11 ` Wei Liu
2015-09-15 8:29 ` [PATCH 3/4] x86/mce: Translate passed-in GPA to host machine address Haozhong Zhang
2015-09-15 9:14 ` Egger, Christoph
2015-09-15 9:48 ` Haozhong Zhang
2015-09-15 13:24 ` Jan Beulich
2015-09-15 13:42 ` Haozhong Zhang
2015-09-15 13:47 ` Jan Beulich
2015-09-15 13:51 ` Haozhong Zhang
2015-09-15 13:50 ` Andrew Cooper
2015-09-16 0:38 ` Haozhong Zhang
2015-09-15 8:29 ` [PATCH 4/4] tools/xen-mceinj: Pass in GPA when injecting through MSR_MCI_ADDR Haozhong Zhang
2015-09-15 10:02 ` Wei Liu
2015-09-15 10:08 ` Egger, Christoph [this message]
2015-09-15 10:16 ` Wei Liu
2015-09-15 10:17 ` Egger, Christoph
2015-09-15 10:28 ` Haozhong Zhang
2015-09-15 10:34 ` Egger, Christoph
2015-09-15 10:20 ` Ian Campbell
2015-09-15 10:38 ` Haozhong Zhang
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