Re: [PATCH v3 06/26] x86/virt/tdx: Prepare to support P-SEAMLDR SEAMCALLs

[Binbin Wu]

On 1/23/2026 10:55 PM, Chao Gao wrote:
> P-SEAMLDR is another component alongside the TDX module within the
> protected SEAM range. P-SEAMLDR can update the TDX module at runtime.
> Software can talk with P-SEAMLDR via SEAMCALLs with the bit 63 of RAX
> (leaf number) set to 1 (a.k.a P-SEAMLDR SEAMCALLs).
> 
> P-SEAMLDR SEAMCALLs differ from SEAMCALLs of the TDX module in terms of
> error codes and the handling of the current VMCS.
> 
> In preparation for adding support for P-SEAMLDR SEAMCALLs, do the two
> following changes to SEAMCALL low-level helpers:
> 
> 1) Tweak sc_retry() to retry on "lack of entropy" errors reported by
>    P-SEAMLDR because it uses a different error code.
> 
> 2) Add seamldr_err() to log error messages on P-SEAMLDR SEAMCALL failures.
> 
> Signed-off-by: Chao Gao <chao.gao@xxxxxxxxx>
> Tested-by: Farrah Chen <farrah.chen@xxxxxxxxx>

Reviewed-by: Binbin Wu <binbin.wu@xxxxxxxxxxxxxxx>