Re: [PATCH v6 05/22] x86/virt/seamldr: Add a helper to retrieve P-SEAMLDR information

[Xiaoyao Li]

On 3/26/2026 4:43 PM, Chao Gao wrote:
> P-SEAMLDR returns its information such as version number, in response to
> the SEAMLDR.INFO SEAMCALL.
>
> This information is useful for userspace. For example, the admin can decide
> which TDX module versions are compatible with the P-SEAMLDR according to
> the P-SEAMLDR version.
>
> Add a helper to retrieve P-SEAMLDR information in preparation for
> exposing P-SEAMLDR version and other necessary information to userspace.
> Export the new kAPI for use by tdx-host.ko.
>
> Note that there are two distinct P-SEAMLDR APIs with similar names:
>
>    SEAMLDR.INFO: Returns a SEAMLDR_INFO structure containing SEAMLDR
>                  information such as version and remaining updates.
>
>    SEAMLDR.SEAMINFO: Returns a SEAMLDR_SEAMINFO structure containing SEAM
>                      and system information such as Convertible Memory
> 		    Regions (CMRs) and number of CPUs and sockets.
>
> The former is used here.
>
> For details, see "Intel® Trust Domain Extensions - SEAM Loader (SEAMLDR)
> Interface Specification" revision 343755-003.
>
> Signed-off-by: Chao Gao<chao.gao@xxxxxxxxx>
> Reviewed-by: Kai Huang<kai.huang@xxxxxxxxx>
> Reviewed-by: Kiryl Shutsemau (Meta)<kas@xxxxxxxxxx>

Reviewed-by: Xiaoyao Li <xiaoyao.li@xxxxxxxxx>