# Re: \[PATCH v3 5/8\] x86/sme: Replace occurrences of sme\_active() with cc\_platform\_has()

- From: Kirill A. Shutemov \<hidden\>
- Date: 2021-09-21 21:34:06 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2021/09/214704
- Thread: https://ratatoskr.run/linuxppc-dev/2021/09/213849/t.md

```text
On Tue, Sep 21, 2021 at 11:27:17PM +0200, Borislav Petkov wrote:
> On Wed, Sep 22, 2021 at 12:20:59AM +0300, Kirill A. Shutemov wrote:
> > I still believe calling cc_platform_has() from __startup_64() is totally
> > broken as it lacks proper wrapping while accessing global variables.
> 
> Well, one of the issues on the AMD side was using boot_cpu_data too
> early and the Intel side uses it too. Can you replace those checks with
> is_tdx_guest() or whatever was the helper's name which would check
> whether the the kernel is running as a TDX guest, and see if that helps?

There's no need in Intel check this early. Only AMD need it. Maybe just
opencode them?

-- 
 Kirill A. Shutemov
```