Re: [PATCH v6 10/11] x86/virt/tdx: Enable Dynamic PAMT

[Kiryl Shutsemau]

On Mon, May 25, 2026 at 07:35:14PM -0700, Rick Edgecombe wrote:
> @@ -152,7 +156,12 @@ const struct tdx_sys_info *tdx_get_sysinfo(void);
>  
>  static inline bool tdx_supports_dynamic_pamt(const struct tdx_sys_info *sysinfo)
>  {
> -	return false; /* To be enabled when kernel is ready */
> +	/*
> +	 * The TDX Module's internal Dynamic PAMT tree structure can't
> +	 * handle physical addresses with more than 48 bits.
> +	 */
> +	return sysinfo->features.tdx_features0 & TDX_FEATURES0_DYNAMIC_PAMT &&
> +	       boot_cpu_data.x86_phys_bits <= 48;

Should we warn for >48?

-- 
  Kiryl Shutsemau / Kirill A. Shutemov