Re: [PATCH 03/15] x86/virt/tdx: Make TDX Module initialize Extensions

[Tony Lindgren]

On Fri, May 22, 2026 at 11:41:16AM +0800, Xu Yilun wrote:
> --- a/arch/x86/virt/vmx/tdx/tdx.c
> +++ b/arch/x86/virt/vmx/tdx/tdx.c
> @@ -1200,6 +1200,22 @@ static u64 to_hpa_list_info(struct page *root, unsigned int nr_pages)
>  	       FIELD_PREP(HPA_LIST_INFO_LAST_ENTRY, nr_pages - 1);
>  }
>  
> +/* Initialize the TDX Module Extensions then Extension-SEAMCALLs can be used */
> +static int tdx_ext_init(void)
> +{
> +	struct tdx_module_args args = {};
> +	u64 r;
> +
> +	do {
> +		r = seamcall(TDH_EXT_INIT, &args);
> +	} while (r == TDX_INTERRUPTED_RESUMABLE);
> +
> +	if (r != TDX_SUCCESS)
> +		return -EFAULT;
> +
> +	return 0;
> +}
> +
>  static int tdx_ext_mem_add(struct page *root, unsigned int nr_pages)
>  {
>  	struct tdx_module_args args = {

How about "Initialize the TDX Module Extensions for Extension-SEAMCALLs"
above for the comment?

Other than that:

Reviewed-by: Tony Lindgren <tony.lindgren@xxxxxxxxxxxxxxx>