On Mon, Oct 26, 2026 at 01:48:57AM +0530, Arun Menon wrote:
> From: Arun Menon <[email protected]>
>
> The size of the command is checked against TPM_BUFSIZE early on before
> even sending it to the backend. We therefore need to increase the
> TPM_BUFSIZE to allow support for larger commands.
>
> For now, 8KB seems sufficient for ML-KEM and ML-DSA algorithms and it is
> also order-1 safe.
>
> Signed-off-by: Arun Menon <[email protected]>
In what timeline? Or is it out of spectrum timeline?
> ---
> include/linux/tpm_command.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/include/linux/tpm_command.h b/include/linux/tpm_command.h
> index fc446a1282e2..4ad11068b090 100644
> --- a/include/linux/tpm_command.h
> +++ b/include/linux/tpm_command.h
> @@ -434,7 +434,7 @@ struct tpm2_context {
> */
>
> #define TPM_DIGEST_SIZE 20 /* Max TPM v1.2 PCR size */
> -#define TPM_BUFSIZE 4096
> +#define TPM_BUFSIZE 8192
>
> /*
> * SHA-512 is, as of today, the largest digest in the TCG algorithm
> repository.
> --
> 2.54.0
>
Br, Jarkko
