From: Jerry Snitselaar <jsnitsel@redhat.com>
To: Jarkko Sakkinen <jarkko@kernel.org>
Cc: equired@linux.intel.com,
justmentioningitbecauseIthinkthatwouldbeagood@linux.intel.com,
James Bottomley <James.Bottomley@HansenPartnership.com>,
linux-integrity@vger.kernel.org, Jason Gunthorpe <jgg@ziepe.ca>,
Peter Huewe <peterhuewe@gmx.de>, Borislav Petkov <bp@alien8.de>,
Nayna Jain <nayna@linux.ibm.com>
Subject: Re: [PATCH v2 0/5] tpm_tis: fix interrupts (again)
Date: Tue, 20 Oct 2020 16:10:42 -0700 [thread overview]
Message-ID: <87y2k0v6h9.fsf@redhat.com> (raw)
In-Reply-To: <20201018210539.GA575510@kapsi.fi>
Jarkko Sakkinen @ 2020-10-18 14:05 MST:
> On Tue, Oct 13, 2020 at 08:15:36AM -0700, Jerry Snitselaar wrote:
>>
>> Jarkko Sakkinen @ 2020-10-12 18:17 MST:
>>
>> > On Thu, Oct 01, 2020 at 11:09:20AM -0700, James Bottomley wrote:
>> >> The current state of the TIS TPM is that interrupts have been globally
>> >> disabled by various changes. The problems we got reported the last
>> >> time they were enabled was interrupt storms. With my own TIS TPM,
>> >> I've found that this is caused because my TPM doesn't do legacy
>> >> cycles, The TIS spec (chapter 6.1 "Locality Usage Per Register")
>> >> requires any TIS TPM without legacy cycles not to act on any write to
>> >> an interrupt register unless the locality is enabled. This means if
>> >> an interrupt fires after we relinquish the locality, the TPM_EOI in
>> >> the interrupt routine is ineffective meaning the same interrupt
>> >> triggers over and over again. This problem also means we can have
>> >> trouble setting up interrupts on TIS TPMs because the current init
>> >> code does the setup before the locality is claimed for the first time.
>> >>
>> >> James
>> >
>> > You should consider expanding the audience. Jerry, once you have some
>> > bandwidth (no rush, does not land before rc2), it would be great that if
>> > you could try this. I'm emphasizing this just because of the
>> > intersection. I think it would also make senset to get tested-by from
>> > Nayna.
>>
>> I will run some tests on some other systems I have access to. As noted
>> in the other email I did a quick test with a t490s with an older bios
>> that exhibits the problem originally reported when Stefan's patch
>> enabled interrupts.
>
> Thank you. As said, I can make a pull request to rc2 or even rc3, if
> needed.
>
> /Jarkko
So outside of the t490s I have access to, it looks like the nuc5 with
tpm2.0 device, and and older lenovo D30 with a tpm1.2 device both are
not using interrupts. I'm digging around to see if I can find some
other systems that I can test interrupts on.
Regards,
Jerry
next prev parent reply other threads:[~2020-10-20 23:10 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-01 18:09 [PATCH v2 0/5] tpm_tis: fix interrupts (again) James Bottomley
2020-10-01 18:09 ` [PATCH v2 1/5] tpm_tis: Fix check_locality for correct locality acquisition James Bottomley
2020-10-05 15:34 ` Jarkko Sakkinen
2020-10-05 19:00 ` James Bottomley
2020-10-05 20:32 ` Jarkko Sakkinen
2020-10-19 23:16 ` Jerry Snitselaar
2020-10-24 12:07 ` Jarkko Sakkinen
2020-10-30 12:13 ` Jarkko Sakkinen
2020-10-01 18:09 ` [PATCH v2 2/5] tpm_tis: Clean up locality release James Bottomley
2020-10-05 17:02 ` Jarkko Sakkinen
2020-10-05 19:05 ` James Bottomley
2020-10-05 20:34 ` Jarkko Sakkinen
2020-10-05 17:03 ` Jarkko Sakkinen
2020-10-19 23:17 ` Jerry Snitselaar
2020-10-24 12:10 ` Jarkko Sakkinen
2020-10-30 12:17 ` Jarkko Sakkinen
2020-10-30 15:47 ` James Bottomley
2020-10-30 21:52 ` Jarkko Sakkinen
2020-10-01 18:09 ` [PATCH v2 3/5] tpm_tis: Fix interrupts for TIS TPMs without legacy cycles James Bottomley
2020-10-05 17:05 ` Jarkko Sakkinen
2020-10-20 0:14 ` Jerry Snitselaar
2020-10-24 12:15 ` Jarkko Sakkinen
2020-10-30 12:18 ` Jarkko Sakkinen
2020-10-30 16:06 ` Jerry Snitselaar
2020-11-03 4:16 ` Jarkko Sakkinen
2020-12-01 18:12 ` Jerry Snitselaar
2020-12-01 19:49 ` Jerry Snitselaar
2020-12-01 21:06 ` James Bottomley
2020-12-01 21:47 ` Jerry Snitselaar
2020-10-01 18:09 ` [PATCH v2 4/5] tpm_tis: fix IRQ probing James Bottomley
2020-10-05 17:05 ` Jarkko Sakkinen
2020-10-19 23:41 ` Jerry Snitselaar
2020-10-24 12:17 ` Jarkko Sakkinen
2020-10-30 12:43 ` Jarkko Sakkinen
2020-10-30 15:49 ` James Bottomley
2020-10-30 16:11 ` Jerry Snitselaar
2020-11-03 4:43 ` Jarkko Sakkinen
2020-11-03 23:00 ` Jerry Snitselaar
2020-11-04 0:31 ` Jarkko Sakkinen
2020-11-03 4:17 ` Jarkko Sakkinen
2020-11-06 15:32 ` Jarkko Sakkinen
2020-11-06 16:21 ` James Bottomley
2020-11-06 22:07 ` Jarkko Sakkinen
2020-10-01 18:09 ` [PATCH v2 5/5] Revert "tpm: Revert "tpm_tis_core: Turn on the TPM before probing IRQ's"" James Bottomley
2020-10-19 20:23 ` Jerry Snitselaar
2020-10-19 22:54 ` James Bottomley
2020-10-19 23:40 ` Jerry Snitselaar
2020-10-12 5:39 ` [PATCH v2 0/5] tpm_tis: fix interrupts (again) Jerry Snitselaar
2020-10-13 1:23 ` Jarkko Sakkinen
2020-10-18 5:34 ` Jarkko Sakkinen
2020-10-13 1:17 ` Jarkko Sakkinen
2020-10-13 15:15 ` Jerry Snitselaar
2020-10-13 15:24 ` James Bottomley
2020-10-13 16:05 ` Jerry Snitselaar
2020-10-14 15:03 ` Hans de Goede
2020-10-14 15:23 ` James Bottomley
2020-10-14 16:04 ` Hans de Goede
2020-10-14 16:34 ` Jerry Snitselaar
2020-10-14 16:46 ` Hans de Goede
2020-10-14 17:01 ` Jerry Snitselaar
2020-10-14 17:04 ` Jerry Snitselaar
2020-10-14 20:58 ` Jerry Snitselaar
2020-10-15 7:38 ` Hans de Goede
2020-10-18 21:09 ` Jarkko Sakkinen
2020-10-15 15:36 ` James Bottomley
2020-10-15 18:48 ` Jerry Snitselaar
2020-10-15 18:57 ` James Bottomley
2020-10-15 19:16 ` Jerry Snitselaar
2020-10-14 16:49 ` James Bottomley
2020-10-18 21:05 ` Jarkko Sakkinen
2020-10-20 23:10 ` Jerry Snitselaar [this message]
2020-10-24 12:20 ` Jarkko Sakkinen
2020-10-26 18:29 ` Jerry Snitselaar
2020-10-27 17:14 ` Jarkko Sakkinen
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