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Date:      Fri, 17 May 2024 11:09:00 +0100
From:      Nuno Teixeira <eduardo@freebsd.org>
To:        FreeBSD CURRENT <freebsd-current@freebsd.org>
Cc:        Justin Hibbits <jhibbits@freebsd.org>
Subject:   kldload tpm: Fail to load: "link_elf_obj: symbol tpm_bus_driver undefined"
Message-ID:  <CAFDf7UKYB8Z0FW-0F3nTkTe3F0SrnJsmnce8p%2BwagFuuqUW-5w@mail.gmail.com>
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Hello,

tpm kernel module fails to load starting on main from May 9.
Updated today and same error:

```
$ kldload tpm
kldload: an error occurred while loading module tpm. Please check dmesg(8)
for more details.

(dmesg)
link_elf_obj: symbol tpm_bus_driver undefined
linker_load_file: /boot/kernel/tpm.ko - unsupported file type
```

I believe it is related to:

---
commit 10eea8dc8c4f3d2a3495e7fb08837d91adf465e9
Author: Justin Hibbits <jhibbits@FreeBSD.org>
Date:   Thu May 9 15:27:35 2024 -0400

    tpm20: Support partial reads

    Summary:
    In some cases the TPM utilities may read only a partial block, instead
    of a full block.  If a new command starts while in the middle of a read
    it may cause the TPM to go catatonic and no longer respond to SPI.

    Reviewed by:    kd
    Obtained from:  Juniper Networks, Inc.
    Differential Revision: https://reviews.freebsd.org/D45140
---

I use tpm for bhyve/Win11.

Thanks,
-- 
Nuno Teixeira
FreeBSD UNIX:  <eduardo@FreeBSD.org>   Web:  https://FreeBSD.org

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<div dir=3D"ltr"><div>Hello,</div><div><br></div><div>tpm kernel module fai=
ls to load starting on main from May 9.</div><div>Updated today and same er=
ror:</div><div><br></div><div>```<br></div><div>$ kldload tpm</div><div>kld=
load: an error occurred while loading module tpm. Please check dmesg(8) for=
 more details.</div><div><br></div><div>(dmesg)</div><div>link_elf_obj: sym=
bol tpm_bus_driver undefined<br>linker_load_file: /boot/kernel/tpm.ko - uns=
upported file type</div><div>```</div><div><br></div><div>I believe it is r=
elated to:</div><div><br></div><div>---<br></div><div>commit 10eea8dc8c4f3d=
2a3495e7fb08837d91adf465e9<br>Author: Justin Hibbits &lt;jhibbits@FreeBSD.o=
rg&gt;<br>Date: =C2=A0 Thu May 9 15:27:35 2024 -0400<br><br>=C2=A0 =C2=A0 t=
pm20: Support partial reads<br><br>=C2=A0 =C2=A0 Summary:<br>=C2=A0 =C2=A0 =
In some cases the TPM utilities may read only a partial block, instead<br>=
=C2=A0 =C2=A0 of a full block.=C2=A0 If a new command starts while in the m=
iddle of a read<br>=C2=A0 =C2=A0 it may cause the TPM to go catatonic and n=
o longer respond to SPI.<br><br>=C2=A0 =C2=A0 Reviewed by: =C2=A0 =C2=A0kd<=
br>=C2=A0 =C2=A0 Obtained from: =C2=A0Juniper Networks, Inc.<br>=C2=A0 =C2=
=A0 Differential Revision: <a href=3D"https://reviews.freebsd.org/D45140">h=
ttps://reviews.freebsd.org/D45140</a></div><div>---</div><div><br></div><di=
v>I use tpm for bhyve/Win11.</div><div><br></div><div>Thanks,<br></div><spa=
n class=3D"gmail_signature_prefix">-- </span><br><div dir=3D"ltr" class=3D"=
gmail_signature" data-smartmail=3D"gmail_signature"><div dir=3D"ltr"><div><=
font color=3D"#888888">Nuno Teixeira</font></div><div><div><font color=3D"#=
888888">
FreeBSD UNIX:=C2=A0 &lt;eduardo@FreeBSD.org&gt;=C2=A0 =C2=A0Web:=C2=A0 <a h=
ref=3D"https://FreeBSD.org" rel=3D"noreferrer" target=3D"_blank">https://Fr=
eeBSD.org</a><br></font></div></div></div></div></div>

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