Re: [tpm2] SPI TPM and SPI flash can not work at the same time

[Sherry Zhang(BJ-RD) <SherryZhang at zhaoxin.com>]

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First of all, thank you!!!
Like:
tpm2_getcap -c properties-fixed
tpm2_getcap -c commands
These commands can not work well.

I do more experiments and find that tpm driver can not work well, but I do not know the reason :
 spi port0/1: flash port2: TPM2.0
 driver modules: tpm_tis.ko(tpm driiver)   spi-zx.ko(spi controller driver)   m25p80.ko(flash driver)
(1) When I boot with ubuntu16.04 of the kernel-4.16.2 , I find that the os only modprobe tpm_tis.ko and spi-zx.ko without m25p80.ko.
So I can see /dev/tpm0,but /dev/mtd0 and /dev/mtd1.
(2) If I do not modprobe m25p80, then /dev/tpm0 works well.
(3) Then I modprobe m25p80,and I test /dev/mtd1. It seems normal.
Then I rmmod spi_zx and m25p80 driver. It seems normal.
But when I rmmod tpm_tis，it shows:
Tpm tpm0: A TPM error (151) occurred stopping the TPM

(4)boot os
  rmmod tpm_tis  ----- normal
  modprobe m25p80 -----normal
  ./spi_flash /dev/mtd1 --- normal
  rmmod m25p80   -----normal

  modprobe tpm_tis ------error

tpm_tis MSFT0101:00: 2.0 TPM (device-id 0x101, rev-id 0)
tpm tpm0:A TPM error(151) occurred continue selftest
tpm tpm0: TPM self test failed

Best regards,
Sherry Zhang


>
> I wish I could help you more, but your TPM isn't returning a valid RC.
>
> Since bit 7 is set in 0x97, this indicates that it is a FMT 1 response code.
>
> Fmt 1 response codes have the handle encoded in bit positions 8-11
> inclusive.
> And is 1-based per
> https://trustedcomputinggroup.org/wp-content/uploads/TPM-Rev-2.0-Part-
> 2-Structures-01.38.pdf
> Section 6.6.
>
> It seems the error bits 0-5 inclusive are 0x17 which is TPM2_RC_TAG.
>
> Which is "a parameter that should be a structure tag has a value that is not
> supported by the TPM"
>
> I'm not sure why this is failing on your TPM, do any other tpm2_getcap
> commands work?
>
> Like:
> tpm2_getcap -c properties-fixed
> tpm2_getcap -c commands
>
> Bill
>
> > -----Original Message-----
> > From: tpm2 [mailto:tpm2-bounces(a)lists.01.org] On Behalf Of Sherry
> > Zhang(BJ-
> > RD)
> > Sent: Monday, November 5, 2018 8:14 PM
> > To: tpm2(a)lists.01.org
> > Subject: [tpm2] SPI TPM and SPI flash can not work at the same time
> >
> > Hi All,
> >
> > Ubuntu16.04 with the kernel 4.16.2:
> >
> > I use a spi port2 with a FIFO TPM2.0 and  two flash on the spi port 0/1.
> >
> > First, I unload drivers of spi controller and test the TPM2.0
> > (built-in tpm_tis.o)
> >
> > #tpm2_abrmd �tcti=”device:/dev/tpm0” �allow-root &
> >
> > #tpm2_pcrlist
> >
> > #tpm2_nvlist
> >
> > And I can use tpm2-tools to test and it is normal .
> >
> >
> >
> > Then I load spi controller driver, and test /dev/mtd0 at spi port0
> > that can work well.
> >
> > But when I run the commad  “tpm2_nvlist” , it shows a error.
> >
> > #tpm2_nvlist
> >
> > ERROR: Tss2_Sys_GetCapability(0x97) �tpm: handle(unk): incorrect
> > structure tag
> >
> > ERROR: Unable to run tpm2_nvlist
> >
> >
> >
> > PS:
> >
> > tpm2-tss 2.1.0
> >
> > Tpm2-abrmd 2.0.3_rc0
> >
> > Tpm2-tools 3.0.2
> >
> >
> >
> > Best regards,
> >
> > Sherry Zhang
> >
> >



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