From: Paolo Bonzini <pbonzini@redhat.com>
To: Gleb Natapov <gleb@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>, Peter Lieven <pl@dlhnet.de>,
Avi Kivity <avi@redhat.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] memtest 4.20+ does not work with -cpu host
Date: Thu, 13 Sep 2012 10:00:26 +0200 [thread overview]
Message-ID: <5051929A.2060407@redhat.com> (raw)
In-Reply-To: <20120913075734.GX20907@redhat.com>
Il 13/09/2012 09:57, Gleb Natapov ha scritto:
>>> > >
>>> > > #rdmsr -0 0x194
>>> > > 0000000000011100
>>> > > #rdmsr -0 0xce
>>> > > 00000c0004011103
>> >
>> > Yes, that can help implementing it in KVM. But without a spec to
>> > understand what the bits actually mean, it's just as risky...
>> >
>> > Peter, do you have any idea where to get the spec of the memory
>> > controller MSRs in Nehalem and newer processors? Apparently, memtest is
>> > using them (and in particular 0x194) to find the speed of the FSB, or
>> > something like that.
>> >
> Why would anyone will want to run memtest in a vm? May be just add those
> MSRs to ignore list and that's it.
>From the output it looks like it's basically a list of bits. Returning
something sensible is better, same as for the speed scaling MSRs.
Paolo
next prev parent reply other threads:[~2012-09-13 8:00 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-22 15:06 [Qemu-devel] memtest 4.20+ does not work with -cpu host Peter Lieven
2012-09-06 14:58 ` Avi Kivity
2012-09-10 11:06 ` Peter Lieven
2012-09-10 11:29 ` Paolo Bonzini
2012-09-10 11:47 ` Peter Lieven
2012-09-10 11:52 ` Peter Lieven
2012-09-10 12:15 ` Paolo Bonzini
2012-09-10 12:21 ` Gleb Natapov
2012-09-10 12:29 ` Peter Lieven
2012-09-10 12:32 ` Avi Kivity
2012-09-10 12:38 ` Peter Lieven
2012-09-13 7:53 ` Peter Lieven
2012-09-13 7:55 ` Paolo Bonzini
2012-09-13 7:57 ` Gleb Natapov
2012-09-13 8:00 ` Paolo Bonzini [this message]
2012-09-13 8:05 ` Gleb Natapov
2012-09-13 12:05 ` Peter Lieven
2012-09-13 12:42 ` Gleb Natapov
2012-09-13 12:56 ` Peter Lieven
2012-09-13 13:43 ` Gleb Natapov
2012-09-10 12:12 ` Avi Kivity
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