Re: [GIT PULL] tpmdd updates for Linux v5.4

Jerry Snitselaar
2019-11-29T23:33:00Z

On Fri Nov 29 19, Jerry Snitselaar wrote:
>On Fri Nov 29 19, Jarkko Sakkinen wrote:
>>On Fri, Nov 22, 2019 at 09:18:36AM -0700, Jerry Snitselaar wrote:
>>>On Wed Nov 20 19, Dan Williams wrote:
>>>> On Mon, Sep 2, 2019 at 7:34 AM Jarkko Sakkinen
>>>> <jarkko.sakkinen@linux.intel.com> wrote:
>>>> >
>>>> > Hi
>>>> >
>>>> > A new driver for fTPM living inside ARM TEE was added this round. In
>>>> > addition to that, there is three bug fixes and one clean up.
>>>> >
>>>> > /Jarkko
>>>> >
>>>> > The following changes since commit 8fb8e9e46261e0117cb3cffb6dd8bb7e08f8649b:
>>>> >
>>>> > Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma (2019-08-30 09:23:45 -0700)
>>>> >
>>>> > are available in the Git repository at:
>>>> >
>>>> > git://git.infradead.org/users/jjs/linux-tpmdd.git tags/tpmdd-next-20190902
>>>> >
>>>> > for you to fetch changes up to e8bd417aab0c72bfb54465596b16085702ba0405:
>>>> >
>>>> > tpm/tpm_ftpm_tee: Document fTPM TEE driver (2019-09-02 17:08:35 +0300)
>>>> >
>>>> > ----------------------------------------------------------------
>>>> > tpmdd updates for Linux v5.4
>>>> >
>>>> > ----------------------------------------------------------------
>>>> > Jarkko Sakkinen (1):
>>>> > tpm: Remove a deprecated comments about implicit sysfs locking
>>>> >
>>>> > Lukas Bulwahn (1):
>>>> > MAINTAINERS: fix style in KEYS-TRUSTED entry
>>>> >
>>>> > Sasha Levin (2):
>>>> > tpm/tpm_ftpm_tee: A driver for firmware TPM running inside TEE
>>>> > tpm/tpm_ftpm_tee: Document fTPM TEE driver
>>>> >
>>>> > Stefan Berger (2):
>>>> > tpm_tis_core: Turn on the TPM before probing IRQ's
>>>> > tpm_tis_core: Set TPM_CHIP_FLAG_IRQ before probing for interrupts
>>>>
>>>> Hi Jarrko,
>>>>
>>>> I'm replying here because I can't find the patches to reply to
>>>> directly from LKML.
>>>>
>>>> Commit 7f064c378e2c "tpm_tis_core: Turn on the TPM before probing
>>>> IRQ's" in the v5.3-stable tree caused a regression on a pre-release
>>>> platform with a TPM2 device. The interrupt starts screaming when the
>>>> driver is loaded and does not stop until the device is force unbond
>>>> from the driver by:
>>>>
>>>> echo IFX0740:00 > /sys/bus/platform/drivers/tpm_tis/unbind
>>>>
>>>> I checked v5.4-rc8 and it has the same problem. I tried reverting:
>>>>
>>>> 1ea32c83c699 tpm_tis_core: Set TPM_CHIP_FLAG_IRQ before probing for interrupts
>>>> 5b359c7c4372 tpm_tis_core: Turn on the TPM before probing IRQ's
>>>>
>>>> Which silenced the screaming interrupt problem, but now the TPM is reporting:
>>>>
>>>> [ 3.725131] tpm_tis IFX0740:00: 2.0 TPM (device-id 0x1B, rev-id 16)
>>>> [ 3.725358] tpm tpm0: tpm_try_transmit: send(): error -5
>>>> [ 3.725359] tpm tpm0: [Firmware Bug]: TPM interrupt not working,
>>>> polling instead
>>>>
>>>> ...at load, where it was not reporting this previously. Can you take a look?
>>>>
>>>
>>>We've had an issue reported for a Lenovo t490s getting an interrupt storm
>>>with the Fedora 5.3 stable kernel, so it appears to be impacting a number of
>>>systems.
>>
>>Hi sorry for inactivity. I've had a renovation going on where I live
>>which has caused some crackling in the comms but I'm catching up during
>>the weekend.
>>
>>Which CPU model does T490S have? Can you paste /proc/cpuinfo?
>>
>>/Jarkko
>>
>
>I still don't have access to one of the laptops, but looking online
>they should have one of the following: i5-8265U, i5-8365U, i7-8565U,
>or i7-8665U. The tpm is discrete, so I don't know that the cpu will
>matter. Looking at a log, in the t490s case it is an STMicroelectronics
>chip. So both Infineon and STM so far.
>

In the case reported on Fedora the cpu is a i7-8665U.