4 Dec
2019
4 Dec
'19
3:36 p.m.
On 04/12/19 16:29, Sean Christopherson wrote:
The extra bit of paranoia doesn't cost much, so play it safe? E.g.:
if (unlikely(boot_cpu_data.extended_cpuid_level < 0x80000008)) { WARN_ON_ONCE(boot_cpu_has(X86_FEATURE_TME) || SME?); return boot_cpu_data.x86_phys_bits; }
return cpuid_eax(0x80000008) & 0xff;
Sounds good. I wouldn't bother with the WARN even.
Paolo