Re: [PATCH v1] tpm: restore timeout for key creation commands

[Jarkko Sakkinen <jarkko@kernel.org>]

On Fri, Apr 10, 2026 at 09:49:39AM +0800, Baoli.Zhang wrote:
> After the per-command duration map was introduced, TPM2 key creation
> commands (`CREATE_PRIMARY`, `CREATE`, `CREATE_LOADED`) were limited to
> 30 seconds.
> 
> On some platforms this is not sufficient and key creation can time out.
> Commit 207696b17f38 ("tpm: use a map for tpm2_calc_ordinal_duration()")
> inadvertently reduced these command timeouts from 300 seconds to 30
> seconds. Restore them to 300 seconds to avoid spurious failures.

Is this like pre-silicon (FPGA) type of situation? I have doubts these
latencies happening on ASIC.

If it is pre-release hardware, maybe there should be option to extend
the delay, or does this happen on actual production hardware?

Just want to understand this better...

> 
> Fixes: 207696b17f38 ("tpm: use a map for tpm2_calc_ordinal_duration()")
> 

Extra empty line.

> Signed-off-by: Baoli.Zhang <baoli.zhang@linux.intel.com>
> Co-developed-by: lili.li <lili.li@intel.com>

"Co-developed-by: states that the patch was co-created by several
developers; it is a used to give attribution to co-authors (in addition
to the author attributed by the From: tag) when multiple people work on
a single patch. Every Co-developed-by: must be immediately followed by a
Signed-off-by: of the associated co-author. Details and examples can be
found in Documentation/process/submitting-patches.rst." [1]

[1] https://docs.kernel.org/process/5.Posting.html

> ---
>  drivers/char/tpm/tpm2-cmd.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
> index 3a77be7ebf4aa..430022f695f24 100644
> --- a/drivers/char/tpm/tpm2-cmd.c
> +++ b/drivers/char/tpm/tpm2-cmd.c
> @@ -71,9 +71,9 @@ static const struct {
>  	{TPM2_CC_HIERARCHY_CHANGE_AUTH, 2000},
>  	{TPM2_CC_GET_CAPABILITY, 750},
>  	{TPM2_CC_NV_READ, 2000},
> -	{TPM2_CC_CREATE_PRIMARY, 30000},
> -	{TPM2_CC_CREATE, 30000},
> -	{TPM2_CC_CREATE_LOADED, 30000},
> +	{TPM2_CC_CREATE_PRIMARY, 300000},
> +	{TPM2_CC_CREATE, 300000},
> +	{TPM2_CC_CREATE_LOADED, 300000},
>  };
>  
>  /**
> -- 
> 2.43.0
> 

BR, Jarkko