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
