Re: [PATCH PATCH 9/9] x86/rfds: Exclude P-only parts from the RFDS affected list

[Dave Hansen]

On 6/17/24 02:43, Andrew Cooper wrote:
> On 17/06/2024 10:12 am, Pawan Gupta wrote:
>> +	VULNBL_INTEL_CPU_TYPE (RAPTORLAKE,	X86_CPU_TYPE_INTEL_ATOM,	RFDS),
>> +	VULNBL_INTEL_CPU_TYPE (ALDERLAKE,	X86_CPU_TYPE_INTEL_ATOM,	RFDS),
> 
> How does this work?
> 
> Being __initconst, this is only evaluated on the BSP.
> 
> P-only and mixed P/E systems won't see X86_CPU_TYPE_INTEL_ATOM, even if
> there are ATOM APs to bring up later.

The X86_CPU_TYPE_* is only used on the boot CPU on non-hybrids.  Hybrids
(independent of the boot CPU type) should be considered vulnerable no
matter what.