Re: [PATCH v4 05/16] x86/mtrr: split MTRR specific handling from cache dis/enabling

[Juergen Gross]

On 26.10.22 11:24, Borislav Petkov wrote:
> On Tue, Oct 04, 2022 at 10:10:12AM +0200, Juergen Gross wrote:
> > @@ -764,11 +779,8 @@ void cache_disable(void) __acquires(cache_disable_lock)
> >   	count_vm_tlb_event(NR_TLB_LOCAL_FLUSH_ALL);
> >   	flush_tlb_local();
> >   
> > -	/* Save MTRR state */
> > -	rdmsr(MSR_MTRRdefType, deftype_lo, deftype_hi);
> > -
> > -	/* Disable MTRRs, and set the default type to uncached */
> > -	mtrr_wrmsr(MSR_MTRRdefType, deftype_lo & ~0xcff, deftype_hi);
> > +	if (boot_cpu_has(X86_FEATURE_MTRR))
>
> check_for_deprecated_apis: Warning: arch/x86/kernel/cpu/mtrr/generic.c:782: Do not use boot_cpu_has() - use cpu_feature_enabled() instead.

Okay.


Juergen

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