From: Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
To: Amit Shah <amit.shah-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
Joerg.Roedel-5C7GfCeVMHo@public.gmane.org,
Markus Rechberger
<markus.rechberger-5C7GfCeVMHo@public.gmane.org>
Subject: Re: [PATCH] discard MSR writes
Date: Tue, 20 Nov 2007 11:47:54 +0200 [thread overview]
Message-ID: <4742AD4A.2080406@qumranet.com> (raw)
In-Reply-To: <200711201315.15337.amit.shah-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
Amit Shah wrote:
> On Tuesday 20 November 2007 00:38:05 Markus Rechberger wrote:
>
>> this patch discards MSR writes to the Performance Event-Select
>> Registers, this is the first issue why vista seems to fail although now
>> vista ends up in an endless loop a bit later.
>> Qemu currently also discards those writes.
>>
>
> Won't this make the corresponding rdmsrs fail? What happens when the rdmsr
> returns an error, but windows then uses some garbage value (as it thinks the
> wrmsr succeeded, so the rdmsr also should)?
>
rdmsr will inject #GP for these msrs. Implementing set_msr() doesn't
affect rdmsr.
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next prev parent reply other threads:[~2007-11-20 9:47 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-19 19:08 [PATCH] discard MSR writes Markus Rechberger
[not found] ` <4741DF15.20708-5C7GfCeVMHo@public.gmane.org>
2007-11-20 7:45 ` Amit Shah
[not found] ` <200711201315.15337.amit.shah-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-11-20 9:47 ` Avi Kivity [this message]
[not found] ` <4742AD4A.2080406-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-11-20 10:09 ` Amit Shah
[not found] ` <200711201539.31712.amit.shah-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-11-20 10:12 ` Avi Kivity
[not found] ` <4742B313.4080704-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-11-20 10:32 ` Amit Shah
[not found] ` <200711201602.43331.amit.shah-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-11-20 10:35 ` Avi Kivity
[not found] ` <4742B88F.8000404-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-11-20 12:31 ` Markus Rechberger
[not found] ` <4742D3AC.2030108-5C7GfCeVMHo@public.gmane.org>
2007-11-20 12:34 ` Avi Kivity
2007-11-20 9:24 ` Avi Kivity
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