[Qemu-devel] Re: [6392] Add BIOS fixes from KVM tree

[Sebastian Herbszt]

Carl-Daniel Hailfinger wrote:
> Hi,
>
> I'm sorry to say that, but my tests showed that
> 0004_kvm-bios-add-mtrr-support.patch is buggy. It reads MSR_MTRRcap
> unconditionally which is not allowed if the CPUID features do not have
> CPUID_MTRR set. Real hardware will #GP in that case.
> This was found by my MSR access tracing patch.
>
> Please add a check for the CPUID_MTRR feature bit before reading
> MSR_MTRRcap. Thanks.

I am in the process of adding this to Bochs. I added checks for CPUID_MTRR
and CPUID_MSR and those could go in on next merge.

- Sebastian