From: Anthony Liguori <aliguori@linux.vnet.ibm.com>
To: Avi Kivity <avi@redhat.com>
Cc: Huang Ying <ying.huang@intel.com>,
Marcelo Tosatti <mtosatti@redhat.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 10:49:55 -0600 [thread overview]
Message-ID: <4CDACD33.8040800@linux.vnet.ibm.com> (raw)
In-Reply-To: <4CDA5911.1080006@redhat.com>
On 11/10/2010 02:34 AM, Avi Kivity wrote:
>> Why the gpa -> hva mapping is not
>> consistent for RAM if -mempath is not used?
>
> Video RAM in the range a0000-bffff and PCI mapped RAM can change gpas
> (while remaining in the same hva).
>
> Even for ordinary RAM, which doesn't normally change gpa/hva, I'm not
> sure we want to guarantee that it won't.
We can't universally either. Memory hot remove potentially breaks the
mapping and some non-x86 architectures (like ARM) can alias RAM via a
guest triggered mechanism.
Regards,
Anthony Liguori
next prev parent reply other threads:[~2010-11-10 16:49 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
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 [this message]
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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