Re: [PATCH v1 1/1] x86: Add support save/load HWCR MSR

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> > diff --git a/target/i386/cpu.c b/target/i386/cpu.c
> > index 85ef7452c0..339131a39a 100644
> > --- a/target/i386/cpu.c
> > +++ b/target/i386/cpu.c
> > @@ -7093,6 +7093,7 @@ static void x86_cpu_reset_hold(Object *obj, ResetType type)
> > env->a20_mask = ~0x0;
> > env->smbase = 0x30000;
> > env->msr_smi_count = 0;
> > + env->hwcr = 0;
>
>
> Why we need to clear it here? This needs to be explained in the commit
> message.

I misunderstood, there’s no need to clear here.

> >
> > +#define MSR_K7_HWCR 0xc0010015
> > +
> > #define MSR_VM_HSAVE_PA 0xc0010117
> >
> > #define MSR_IA32_XFD 0x000001c4
> > @@ -1859,6 +1861,9 @@ typedef struct CPUArchState {
> > uint64_t msr_lbr_depth;
> > LBREntry lbr_records[ARCH_LBR_NR_ENTRIES];
> >
> > + /* Hardware Configuration MSR */
>
>
> We can keep the same comment as msr_hwcr in KVM to emphasize this is an
> AMD-specific MSR, i.e.,
>
>
> /* AMD MSRC001_0015 Hardware Configuration */
>
>
> > + uint64_t hwcr;
>
>
> Add the msr_ prefix to indicate that this value is only intended to
> store the MSR. Currently, for similar members, some have the msr_ prefix
> and some do not, but it is better to have it for clarity.
>

Thanks, I will modify it.





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