On 17/05/2023 15:29, Peter Ujfalusi wrote:
> The interrupts initially works on the device but they will stop arriving
> after about 200 interrupts.
>
> On system reboot/shutdown this will cause a long wait (120000 jiffies).
>
> The interrupts on this device got enabled by commit
> e644b2f498d2 ("tpm, tpm_tis: Enable interrupt test")
>
> Prior to this point the interrupts were not enabled on this machine.
>
> Complements: e644b2f498d2 ("tpm, tpm_tis: Enable interrupt test")
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>
> ---
> Hi,
>
> This patch applies on top of mainline since 6.4-rc1 takes about 2 minutes to
> reboot on this machine, linux-next have
> e7d3e5c4b1dd tpm/tpm_tis: Disable interrupts for more Lenovo devices
>
> I'm not sure if I shouold send this on top of next or mainline is fine, please
> let me know the preferred way to get this to 6.4.
In 6.3 the kernel prints this on boot:
# dmesg -w | grep tpm
tpm_tis MSFT0101:00: 2.0 TPM (device-id 0x1B, rev-id 22)
tpm tpm0: [Firmware Bug]: TPM interrupt not working, polling instead
It is interesting that with 6.4 most of the times the interrupts got
enabled (without this patch) resulting stall during reboot/shutdown but
there are few boots when the driver falls back to polling and thus the
TPM driver works.
The command which 'locks' the system is TPM2_CC_SHUTDOWN, it is given
TPM_UNDEFINED as duration index by tpm2_ordinal_duration_index().
>
> Regards,
> Peter
>
> drivers/char/tpm/tpm_tis.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
> index 7af389806643..aad682c2ab21 100644
> --- a/drivers/char/tpm/tpm_tis.c
> +++ b/drivers/char/tpm/tpm_tis.c
> @@ -122,6 +122,13 @@ static const struct dmi_system_id tpm_tis_dmi_table[] = {
> DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T490s"),
> },
> },
> + {
> + .callback = tpm_tis_disable_irq,
> + .ident = "UPX-TGL",
> + .matches = {
> + DMI_MATCH(DMI_SYS_VENDOR, "AAEON"),
> + },
> + },
> {}
> };
>
--
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