Re: [PATCH] x86/mm: Check cc_vendor when printing memory encryption info

[Jeremi Piotrowski]

On 09/11/2023 17:25, Dave Hansen wrote:
> On 11/9/23 08:14, Jeremi Piotrowski wrote:
> ...
>>  	pr_info("Memory Encryption Features active:");
>>  
>> -	if (cpu_feature_enabled(X86_FEATURE_TDX_GUEST)) {
>> +	if (cc_vendor == CC_VENDOR_INTEL) {
>>  		pr_cont(" Intel TDX\n");
>>  		return;
>>  	}
> 
> Why aren't these guests setting X86_FEATURE_TDX_GUEST?

They could if we can confirm that the code gated behind
cpu_feature_enabled(X86_FEATURE_TDX_GUEST) is correct when running with TD partitioning.

It still makes sense to have these prints based on the cc_xxx abstractions.

Jeremi