Re: [PATCHv2 03/29] x86/tdx: Add __tdx_module_call() and __tdx_hypercall() helper functions

[Kai Huang]

> > 	/*
> > 	 * SEAMCALL instruction is essentially a VMExit from VMX root
> > 	 * mode to SEAM VMX root mode.  VMfailInvalid (CF=1) indicates
> > 	 * that the targeted SEAM firmware is not loaded or disabled,
> > 	 * or P-SEAMLDR is busy with another SEAMCALL.  %rax is not
> > 	 * changed in this case.
> > 	 *
> > 	 * Set %rax to VMFAILINVALID for VMfailInvalid.  This value
> > 	 * will never be used as actual SEAMCALL error code.
> > 	 */
> > 	jnb     .Lno_vmfailinvalid
> > 	mov     $(VMFAILINVALID), %rax
> > 	jmp     .Lno_output_struct
> > 
> > .Lno_vmfailinvalid:
> 
> Okay, I will add it under .if \host.
> 
> But maybe use JNC instead of JNB? Since we check for CF flag,
> Jump-if-Not-Carry sounds more reasonable than Jump-if-Not-Below.
> Not-Below of what?

Fine with JNC :)