Re: [PATCH v12 05/22] x86/virt/tdx: Add SEAMCALL infrastructure

[kirill . shutemov]

On Wed, Jun 28, 2023 at 03:54:36PM +0200, Peter Zijlstra wrote:
> On Wed, Jun 28, 2023 at 02:58:13PM +0200, Peter Zijlstra wrote:
> 
> > Can someone explain to me why __tdx_hypercall() is sane (per the above)
> > but then we grew __tdx_module_call() as an absolute abomination and are
> > apparently using that for seam too?
> 
> That is, why do we have two different TDCALL wrappers? Makes no sense.

__tdx_module_call() is the wrapper for TDCALL.

__tdx_hypercall() is the wrapper for TDG.VP.VMCALL leaf function of
TDCALL. The function is used often and it uses wider range or registers
comparing to the rest of the TDCALL functions.

-- 
  Kiryl Shutsemau / Kirill A. Shutemov