From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nayna Jain <nayna-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
Subject: Re: TPM2.0: No binary_bios_measurements file in
 securityFS
Date: Wed, 13 Sep 2017 17:33:56 +0530
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To: "Nasim, Kam" <Kam.Nasim-CWA4WttNNZF54TAoqtyWWQ@public.gmane.org>, "tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org" <tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>
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On 09/12/2017 04:14 AM, Nasim, Kam wrote:
>
> Hi folks,
>
>
> I am building my TPM 2.0 driver as Kernel modules (tpm.ko,=20
> tpm_tis_core.ko and tpm_tis.ko).
>
> I noticed that while my /sys/kernel/security directory is created and=20
> mounted to securityFS, it is empty.
>
> Looking at tpm_bios_log_setup() in tpm1_event.log, I see that this is=20
> being done during chip registration:
>
TPM 2.0 binary_bios_measurements event log file support is currently not=20
available for ACPI based platform. It is only for device tree based=20
platform. And I think you are using ACPI.

Thanks & Regards,
 =A0=A0=A0 - Nayna
>
> if (chip->flags & TPM_CHIP_FLAG_TPM2)
>
> chip->bin_log_seqops.seqops =3D
>
> &tpm2_binary_b_measurements_seqops;
>
> =A0=A0=A0 else
>
> chip->bin_log_seqops.seqops =3D
>
> &tpm_binary_b_measurements_seqops;
>
> chip->bios_dir[cnt] =3D
>
> securityfs_create_file("binary_bios_measurements",
>
> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 0440, chip->bios=
_dir[0],
>
> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 (void *)&chip->b=
in_log_seqops,
>
> &tpm_bios_measurements_ops);
>
> =A0=A0=A0 if (IS_ERR(chip->bios_dir[cnt]))
>
> =A0=A0=A0=A0=A0=A0=A0 goto err;
>
> My TPM modules are loaded properly and I can interact with TPM using=20
> userspace TSS2 applications:
>
> $ sudo lsmod | grep tpm
>
> Password:
>
> tpm_crb 6458=A0 0
>
> tpm_tis 5950=A0 0
>
> tpm_tis_core 10054=A0 1 tpm_tis
>
> tpm 48093=A0 3 tpm_crb,tpm_tis,tpm_tis_core
>
> 2017-09-08T19:39:16.239 controller-0 kernel: warning [=A0=A0=A0 0.00000=
0]=20
> ACPI: TPM2 000000007b7c8000 00034 (v03 INTEL=A0=A0 S2600WT 00000002 INT=
L=20
> 01000013)
>
> 2017-09-08T19:39:16.252 controller-0 kernel: info [=A0=A0=A0 5.457568]=20
> tpm_tis MSFT0101:00: 2.0 TPM (device-id 0x1A, rev-id 16)
>
> How and when would this file be created? For that matter I don=92t even=
=20
> have a /sys/devices/pnp0/<pnp#>/pcrs file present
>
> (I am on CentOS 7.3)
>
> Thoughts?
>
> Thanks,
>
> Kam
>
>
>
> -----------------------------------------------------------------------=
-------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
>
>
> _______________________________________________
> tpmdd-devel mailing list
> tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
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    <br>
    <div class=3D"moz-cite-prefix">On 09/12/2017 04:14 AM, Nasim, Kam
      wrote:<br>
    </div>
    <blockquote type=3D"cite"
cite=3D"mid:CA352AD04C14CE4985F6AEB6AB8C130E3EDB8751-/c0cZIGrDsgyzarUywkIak48LkL9auvm@public.gmane.org=
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      <div class=3D"WordSection1">
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">Hi folks,<o:p></o:p><=
/span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA"><br>
            I am building my TPM 2.0 driver as Kernel modules (tpm.ko,
            tpm_tis_core.ko and tpm_tis.ko).<o:p></o:p></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p>=A0</o:p></span>=
</p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">I noticed that while =
my
            /sys/kernel/security directory is created and mounted to
            securityFS, it is empty.
            <o:p></o:p></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p>=A0</o:p></span>=
</p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">Looking at
            tpm_bios_log_setup() in tpm1_event.log, I see that this is
            being done during chip registration:</span></p>
      </div>
    </blockquote>
    TPM 2.0 binary_bios_measurements event log file support is currently
    not available for ACPI based platform. It is only for device tree
    based platform. And I think you are using ACPI.<br>
    <br>
    Thanks &amp; Regards,<br>
    =A0=A0=A0 - Nayna<br>
    <blockquote type=3D"cite"
cite=3D"mid:CA352AD04C14CE4985F6AEB6AB8C130E3EDB8751-/c0cZIGrDsgyzarUywkIak48LkL9auvm@public.gmane.org=
com">
      <div class=3D"WordSection1">
        <p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p></o:p></span></p=
>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p>=A0</o:p></span>=
</p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">if (chip-&gt;flags &a=
mp;
            TPM_CHIP_FLAG_TPM2)<o:p></o:p></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">=A0=A0=A0=A0=A0=A0=A0
            chip-&gt;bin_log_seqops.seqops =3D<o:p></o:p></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0
            &amp;tpm2_binary_b_measurements_seqops;<o:p></o:p></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">=A0=A0=A0 else<o:p></=
o:p></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">=A0=A0=A0=A0=A0=A0=A0
            chip-&gt;bin_log_seqops.seqops =3D<o:p></o:p></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0
            &amp;tpm_binary_b_measurements_seqops;<o:p></o:p></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p>=A0</o:p></span>=
</p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p>=A0</o:p></span>=
</p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">=A0=A0=A0
            chip-&gt;bios_dir[cnt] =3D<o:p></o:p></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">=A0=A0=A0=A0=A0=A0=A0
            securityfs_create_file("binary_bios_measurements",<o:p></o:p>=
</span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 0440,
            chip-&gt;bios_dir[0],<o:p></o:p></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 (void
            *)&amp;chip-&gt;bin_log_seqops,<o:p></o:p></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0
            &amp;tpm_bios_measurements_ops);<o:p></o:p></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">=A0=A0=A0 if
            (IS_ERR(chip-&gt;bios_dir[cnt]))<o:p></o:p></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">=A0=A0=A0=A0=A0=A0=A0=
 goto err;<o:p></o:p></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p>=A0</o:p></span>=
</p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p>=A0</o:p></span>=
</p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">My TPM modules are
            loaded properly and I can interact with TPM using userspace
            TSS2 applications:<o:p></o:p></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p>=A0</o:p></span>=
</p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">$ sudo lsmod | grep t=
pm<o:p></o:p></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">Password:<o:p></o:p><=
/span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">tpm_crb=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0
            6458=A0 0<o:p></o:p></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">tpm_tis=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0
            5950=A0 0<o:p></o:p></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">tpm_tis_core=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0
            10054=A0 1 tpm_tis<o:p></o:p></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">tpm=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0
            48093=A0 3 tpm_crb,tpm_tis,tpm_tis_core<o:p></o:p></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p>=A0</o:p></span>=
</p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p>=A0</o:p></span>=
</p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">2017-09-08T19:39:16.2=
39
            controller-0 kernel: warning [=A0=A0=A0 0.000000] ACPI: TPM2
            000000007b7c8000 00034 (v03 INTEL=A0=A0 S2600WT 00000002 INTL
            01000013)<o:p></o:p></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">2017-09-08T19:39:16.2=
52
            controller-0 kernel: info [=A0=A0=A0 5.457568] tpm_tis
            MSFT0101:00: 2.0 TPM (device-id 0x1A, rev-id 16)<o:p></o:p></=
span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p>=A0</o:p></span>=
</p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p>=A0</o:p></span>=
</p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">How and when would th=
is
            file be created? For that matter I don=92t even have a
            /sys/devices/pnp0/&lt;pnp#&gt;/pcrs file present<o:p></o:p></=
span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">(I am on CentOS 7.3)<=
o:p></o:p></span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p>=A0</o:p></span>=
</p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p>=A0</o:p></span>=
</p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">Thoughts?<o:p></o:p><=
/span></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA"><o:p>=A0</o:p></span>=
</p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">Thanks,<o:p></o:p></s=
pan></p>
        <p class=3D"MsoNormal"><span lang=3D"EN-CA">Kam<o:p></o:p></span>=
</p>
      </div>
      <br>
      <fieldset class=3D"mimeAttachmentHeader"></fieldset>
      <br>
      <pre wrap=3D"">----------------------------------------------------=
--------------------------
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      <br>
      <pre wrap=3D"">_______________________________________________
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