Re: [PATCH v4 0/8] Implement generic cc_platform_has() helper function

From: Borislav Petkov
Date: Tue Sep 28 2021 - 16:58:19 EST

On Tue, Sep 28, 2021 at 01:48:46PM -0700, Kuppuswamy, Sathyanarayanan wrote:
> Just read it. If you want to use cpuid_has_tdx_guest() directly in
> cc_platform_has(), then you want to rename intel_cc_platform_has() to
> tdx_cc_platform_has()?


You simply do:

if (cpuid_has_tdx_guest())

and lemme paste from that mail: " should use
cpuid_has_tdx_guest() instead but cache its result so that you don't
call CPUID each time the kernel executes cc_platform_has()."

Makes sense?