Re: [PATCH 3/4] x86/fpu: Make the EFI FPU calling convention explicit

[Borislav Petkov]

On Sun, Jan 17, 2021 at 10:20:40PM -0800, Andy Lutomirski wrote:
> EFI uses kernel_fpu_begin() to conform to the UEFI calling convention.
> This specifically requires initializing FCW, whereas no sane 64-bit kernel
> code should use legacy 387 operations that reference FCW.
> 
> Add KFPU_EFI to make this self-documenting, and use it in the EFI code.

I'd prefer if you slap a comment over the kernel_fpu_begin() calls in
efi instead of adding a separate define etc.

Thx.

-- 
Regards/Gruss,
    Boris.

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