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SubjectRe: [PATCH] x86/cpu: clear X86_BUG_SPECTRE_V2 on Zhaoxin family 7 CPUs
Date
Tony W Wang-oc <TonyWWang-oc@zhaoxin.com> writes:

> These CPUs are not affected by spectre_v2, so clear spectre_v2 bug flag
> in their specific initialization code.
>
> if (cpu_has(c, X86_FEATURE_VMX))
> centaur_detect_vmx_virtcap(c);
> +
> + if (c->x86 == 7) {
> + setup_clear_cpu_cap(X86_BUG_SPECTRE_V2);
> + clear_bit(X86_BUG_SPECTRE_V2, (unsigned long *)cpu_caps_set);

No. Please use cpu_vuln_whitelist. It exists for exactly this
purpose. You just need to extend it with a NO_SPECTRE_V2 bit.

Thanks,

tglx


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