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Re: [Qemu-devel] [PATCH] target-i386: do not read/write MSR_TSC_AUX from

From: Eduardo Habkost
Subject: Re: [Qemu-devel] [PATCH] target-i386: do not read/write MSR_TSC_AUX from KVM if CPUID bit is not set
Date: Thu, 31 Mar 2016 13:26:55 -0300
User-agent: Mutt/1.5.23 (2014-03-12)

On Wed, Mar 30, 2016 at 10:59:42PM +0200, Paolo Bonzini wrote:
> KVM does not let you read or write this MSR if the corresponding CPUID
> bit is not set.  This in turn causes MSRs that come after MSR_TSC_AUX
> to be ignored by KVM_SET_MRSS.
> One visible symptom is that s3.flat from kvm-unit-tests fails with
> CPUs that do not have RDTSCP, because the SMBASE is not reset to
> 0x30000 after reset.
> Fixes: c9b8f6b6210847b4381c5b2ee172b1c7eb9985d6
> Cc: address@hidden
> Signed-off-by: Paolo Bonzini <address@hidden>

Reviewed-by: Eduardo Habkost <address@hidden>


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