From: Avi Kivity <avi@redhat.com>
To: Huang Ying <ying.huang@intel.com>
Cc: Anthony Liguori <aliguori@linux.vnet.ibm.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
Anthony Liguori <aliguori@us.ibm.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
Andi Kleen <andi@firstfloor.org>,
Dean Nelson <dnelson@redhat.com>,
Luiz Capitulino <lcapitulino@redhat.com>
Subject: Re: [PATCH -v2] Monitor command: pfa2hva, translate guest physical address to host virtual address
Date: Wed, 10 Nov 2010 10:48:53 +0200 [thread overview]
Message-ID: <4CDA5C75.2050403@redhat.com> (raw)
In-Reply-To: <1289378284.8719.72.camel@yhuang-dev>
On 11/10/2010 10:38 AM, Huang Ying wrote:
> >
> > If we get a full address (rather than just a frame number) then we can
> > identify the 4k page and send an mce just for that frame?
>
> We need host kernel to break down the 2M huge page into 4k pages. Then
> send SIGBUS to QEMU with the poisoned 4k page. Because host kernel will
> poison the whole 2M virtual address space otherwise, and other 4k pages
> inside the 2M page can not used accessed in guest (will trigger SIGBUS
> and SRAR MCE).
>
We could do that by using mmap(MAP_FIXED) or mremap(). It's probably
not worth it just for testing, but it has a real use, no?
Note we may need to stop the guest while we copy memory.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2010-11-10 8:49 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-26 2:39 [PATCH -v2] Monitor command: pfa2hva, translate guest physical address to host virtual address Huang Ying
2010-11-01 16:09 ` Marcelo Tosatti
2010-11-01 18:49 ` Anthony Liguori
2010-11-01 19:20 ` Huang Ying
2010-11-01 19:22 ` Anthony Liguori
2010-11-04 16:53 ` Luiz Capitulino
2010-11-06 16:24 ` Avi Kivity
2010-11-08 1:29 ` Huang Ying
2010-11-08 3:39 ` Anthony Liguori
2010-11-08 20:46 ` Huang Ying
2010-11-09 3:06 ` Huang Ying
2010-11-10 6:56 ` Avi Kivity
2010-11-10 6:59 ` Avi Kivity
2010-11-10 7:41 ` Huang Ying
2010-11-10 8:28 ` Avi Kivity
2010-11-10 8:38 ` Huang Ying
2010-11-10 8:48 ` Avi Kivity [this message]
2010-11-10 16:42 ` Andi Kleen
2010-11-10 17:08 ` Avi Kivity
2010-11-10 17:44 ` Andi Kleen
2010-11-10 17:47 ` Avi Kivity
2010-11-10 19:16 ` Andi Kleen
2010-11-10 20:58 ` Avi Kivity
2010-11-10 8:21 ` Huang Ying
2010-11-10 8:34 ` Avi Kivity
2010-11-10 16:49 ` Anthony Liguori
2010-11-11 0:56 ` Huang Ying
2010-11-11 9:39 ` Avi Kivity
2010-11-12 1:16 ` Huang Ying
2010-11-14 11:08 ` Avi Kivity
2010-11-14 11:09 ` Avi Kivity
2010-11-15 1:46 ` Huang Ying
2010-11-15 10:02 ` Andi Kleen
2010-11-08 3:37 ` Anthony Liguori
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