From: Andi Kleen <andi@firstfloor.org>
To: Avi Kivity <avi@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>,
Huang Ying <ying.huang@intel.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Add MCE support to KVM
Date: Mon, 13 Apr 2009 10:26:03 +0200 [thread overview]
Message-ID: <20090413082603.GS14687@one.firstfloor.org> (raw)
In-Reply-To: <49E08C2F.4010003@redhat.com>
On Sat, Apr 11, 2009 at 03:25:19PM +0300, Avi Kivity wrote:
> Andi Kleen wrote:
> >>Right, but we can allocate the maximum number, no? it's a fairly small
> >>amount of memory.
> >>
> >
> >There are 255 banks worst case which need upto 4 (in theory 5) MSRs each
> >
> >
>
> That's 8KB, which would normally not be allocated. But I think we can
> live with it.
>
> Do we actually need to support 255 banks?
Probably not. Current CPUs all have a single digit number.
e.g. 64 would be plenty for now.
> Or can we support a smaller
> number transparently?
Not transparently. In theory software can hardcode that for cpu model X bank Y
is available and does Z. Software doesn't have too, Intel provides a bank
independent way to report errors too, but we don't know if everyone uses it.
Linux doesn't rely on bank numbers on Intel at least.
-Andi
--
ak@linux.intel.com -- Speaking for myself only.
next prev parent reply other threads:[~2009-04-13 8:23 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-08 1:53 [PATCH] Add MCE support to KVM Huang Ying
2009-04-09 15:50 ` Avi Kivity
2009-04-10 3:00 ` Huang Ying
2009-04-11 12:04 ` Avi Kivity
2009-04-11 12:19 ` Andi Kleen
2009-04-11 12:25 ` Avi Kivity
2009-04-13 8:26 ` Andi Kleen [this message]
2009-04-13 2:41 ` Huang Ying
2009-04-13 13:02 ` Avi Kivity
2009-04-14 2:04 ` Huang Ying
2009-04-14 10:45 ` Avi Kivity
2009-04-15 7:24 ` Huang Ying
2009-04-18 22:17 ` Anthony Liguori
2009-04-19 8:33 ` Avi Kivity
2009-04-20 7:52 ` Gerd Hoffmann
2009-04-20 8:26 ` Avi Kivity
2009-04-20 8:59 ` Gerd Hoffmann
2009-04-20 9:05 ` Avi Kivity
2009-04-20 10:04 ` Andi Kleen
2009-04-20 11:02 ` Avi Kivity
2009-04-20 11:23 ` Gerd Hoffmann
2009-04-20 11:27 ` Avi Kivity
2009-04-20 12:20 ` Gerd Hoffmann
2009-04-20 12:43 ` Avi Kivity
2009-04-20 13:24 ` Gerd Hoffmann
2009-04-20 13:45 ` Avi Kivity
2009-04-21 9:14 ` Xenner design and kvm msr handling Gerd Hoffmann
2009-04-21 10:14 ` Avi Kivity
2009-04-21 11:41 ` Gerd Hoffmann
2009-04-21 12:27 ` Avi Kivity
2009-04-21 12:47 ` Gerd Hoffmann
2009-04-21 13:33 ` Avi Kivity
2009-04-21 16:00 ` Gerd Hoffmann
2009-04-21 16:15 ` Avi Kivity
2009-04-22 10:02 ` Gerd Hoffmann
2009-04-21 16:04 ` [PATCH] Add MCE support to KVM Anthony Liguori
2009-04-21 16:17 ` Avi Kivity
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