Re: [PATCHv5 01/30] x86/tdx: Detect running as a TDX guest in early boot

[Dave Hansen]

On 3/4/22 07:43, Borislav Petkov wrote:
> On Wed, Mar 02, 2022 at 05:27:37PM +0300, Kirill A. Shutemov wrote:
>> +void __init tdx_early_init(void)
>> +{
>> +	u32 eax, sig[3];
>> +
>> +	cpuid_count(TDX_CPUID_LEAF_ID, 0, &eax, &sig[0], &sig[2],  &sig[1]);
>> +
>> +	BUILD_BUG_ON(sizeof(sig) != sizeof(TDX_IDENT) - 1);
> That's new.
> 
> Is that pure paranoia or what are you protecting here against?

Pure reviewer paranoia. :)

  https://lore.kernel.org/all/YhN5edJQ+LkVc0us@grain/