Re: [PATCH v7 08/16] i386: Expose module level in CPUID[0x1F]

[Yuan Yao]

On Mon, Jan 15, 2024 at 02:20:20PM +0800, Zhao Liu wrote:
> On Mon, Jan 15, 2024 at 01:20:22PM +0800, Yuan Yao wrote:
> > Date: Mon, 15 Jan 2024 13:20:22 +0800
> > From: Yuan Yao <yuan.yao@linux.intel.com>
> > Subject: Re: [PATCH v7 08/16] i386: Expose module level in CPUID[0x1F]
> >
> > Ah, so my understanding is incorrect on this.
> >
> > I tried on one raptor lake i5-i335U, which also hybrid soc but doesn't have
> > module level, in this case 0x1f and 0xb have same values in core/lp level.
>
> Some socs have modules/dies but they don't expose them in 0x1f.

Here they don't expose because from hardware level they can't or possible
software level configuration (i.e. disable some cores in bios) ?

>
> If the soc only expose thread/core levels in 0x1f, then its 0x1f is same
> as 0x0b. Otherwise, it will have more subleaves and different
> values.
>
> Thanks,
> Zhao
>