Re: [PATCH v3 03/21] x86/virt/tdx: Implement the SEAMCALL base function

[Sathyanarayanan Kuppuswamy]

On 4/5/22 9:49 PM, Kai Huang wrote:
> SEAMCALL leaf functions use an ABI different from the x86-64 system-v
> ABI.  Instead, they share the same ABI with the TDCALL leaf functions.

TDCALL is a new term for this patch set. Maybe add some detail about
it in ()?.

> %rax is used to carry both the SEAMCALL leaf function number (input) and
> the completion status code (output).  Additional GPRs (%rcx, %rdx,
> %r8->%r11) may be further used as both input and output operands in
> individual leaf functions.



--
Sathyanarayanan Kuppuswamy
Linux Kernel Developer