Re: [PATCH 2/2] amd: uncore: Get correct number of cores sharing last level cache

[Janakarajan Natarajan]

On 06/06/2017 12:45 PM, Borislav Petkov wrote:
> On Tue, Jun 06, 2017 at 12:15:30PM +0200, Peter Zijlstra wrote:
> > Maybe something like:
> >
> > 	for (cache_level = 0; cache_level < 3; cache_level++) {
> > 		cpuid_count(0x8000001d, cache_level, &eax, &ebx, &ecx, &edx);
> >
> > 		if ((eax & 0x1f) == 0) /* EAX[0:4] gives cache type */
> 		if (!(eax & 0x1f))
>
> > 			break;
> >
> > 		prev_eax = eax;
> > 	}
> >
> > That way we'll not run off into the woods if CPUID goes funny (never
> > trust a BIOS/virt monkey).
> Yap, especially if there are CPUID functions with subleafs with holes in
> them.
Okay. I can send a v2 with the changes.
>