From: "H. Peter Anvin" <hpa@zytor.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Joerg Roedel <joerg.roedel@amd.com>,
tglx@linutronix.de, mingo@redhat.com,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] X86: don't print a warning when MTRR are blank and running in KVM
Date: Fri, 22 Feb 2008 02:04:49 -0800 [thread overview]
Message-ID: <47BE9E41.9000100@zytor.com> (raw)
In-Reply-To: <20080222100044.GA6807@elte.hu>
Ingo Molnar wrote:
> * H. Peter Anvin <hpa@zytor.com> wrote:
>
>> Ingo Molnar wrote:
>>> * H. Peter Anvin <hpa@zytor.com> wrote:
>>>
>>>>> I'm not sure how we could detect pure Qemu instances - perhaps it should
>>>>> define some special MSR or something?
>>>> Perhaps they should fix the Qemu BIOS to actually simulate working MSRs;
>>>> if nothing else, they should set up the default MTRR to be cachable.
>>> btw., should KVM do the same?
>> Yes. Especially since they share a BIOS.
>
> ok. Then i guess we should just leave the warning and the backtrace in
> place until they get a fix done?
>
That would be my opinion.
Last I checked, they didn't even clear the cache disable bits in %cr0.
-hpa
next prev parent reply other threads:[~2008-02-22 10:06 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-21 14:50 [PATCH] X86: don't print a warning when MTRR are blank and running in KVM Joerg Roedel
2008-02-21 19:54 ` Yinghai Lu
2008-02-22 11:18 ` Joerg Roedel
2008-02-21 20:37 ` Ingo Molnar
2008-02-21 22:31 ` H. Peter Anvin
2008-02-22 9:45 ` Ingo Molnar
2008-02-22 9:58 ` H. Peter Anvin
2008-02-22 10:00 ` Ingo Molnar
2008-02-22 10:04 ` H. Peter Anvin [this message]
2008-02-22 11:15 ` Joerg Roedel
2008-02-22 12:48 ` Ingo Molnar
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