Re: [PATCH v4 10/24] x86/virt/seamldr: Allocate and populate a module update request

[Xu Yilun]

On Thu, Feb 12, 2026 at 06:35:13AM -0800, Chao Gao wrote:
> P-SEAMLDR uses the SEAMLDR_PARAMS structure to describe TDX Module
> update requests. This structure contains physical addresses pointing to
> the module binary and its signature file (or sigstruct), along with an
> update scenario field.
> 
> TDX Modules are distributed in the tdx_blob format defined at [1]. A
> tdx_blob contains a header, sigstruct, and module binary. This is also
> the format supplied by the userspace to the kernel.
> 
> Parse the tdx_blob format and populate a SEAMLDR_PARAMS structure
> accordingly. This structure will be passed to P-SEAMLDR to initiate the
> update.
> 
> Note that the sigstruct_pa field in SEAMLDR_PARAMS has been extended to
> a 4-element array. The updated "SEAM Loader (SEAMLDR) Interface
> Specification" will be published separately. The kernel does not
> validate P-SEAMLDR compatibility (for example, whether it supports 4KB
> or 16KB sigstruct); userspace must ensure the P-SEAMLDR version is
> compatible with the selected TDX Module by checking the minimum
> P-SEAMLDR version requirements at [2].
> 
> Signed-off-by: Chao Gao <chao.gao@xxxxxxxxx>
> Reviewed-by: Tony Lindgren <tony.lindgren@xxxxxxxxxxxxxxx>

Reviewed-by: Xu Yilun <yilun.xu@xxxxxxxxxxxxxxx>