On Thu, 2010-07-08 at 15:43 +0800, Avi Kivity wrote:
> On 07/08/2010 05:07 AM, Huang Ying wrote:
> >
> >> static u32 emulated_msrs[] = {
> >> MSR_IA32_MISC_ENABLE,
> >> + MSR_IA32_MCG_STATUS,
> >> + MSR_IA32_MCG_CTL,
> >>
> > We need only clear MSR_IA32_MCG_STATUS during reset, but should not
> > clear MSR_IA32_MCG_CTL.
> >
> >
>
> Why not?
According to Intel 64 and IA32 Architectures Software Developer's Manual
(SDM) Vol 3A (Table 9-1), machine check MSRs should be sticky across
reset. Except we need some special processing for MSR_IA32_MCG_STATUS.
And if we clear MSR_IA32_MCG_CTL, the machine check reporting is
disabled according to SDM Vol 3A, section 15.3.1.3
Best Regards,
Huang Ying
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