Messages in this thread | | | Subject | Re: [PATCH] KVM: x86: use CPUID to locate host page table reserved bits | From | Paolo Bonzini <> | Date | Wed, 4 Dec 2019 16:36:16 +0100 |
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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
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