From: "James Bottomley" <James.Bottomley@HansenPartnership.com>
To: devel@edk2.groups.io, public@thson.de, Laszlo Ersek <lersek@redhat.com>
Cc: ardb+tianocore@kernel.org
Subject: Re: [edk2-devel] Problem: TPM 2.0 event log by OVMF is shown empty in Linux kernel versions after 5.8
Date: Wed, 28 Apr 2021 15:03:35 -0700 [thread overview]
Message-ID: <f31849e661d5d12acc0a6a3ec5e1cbb7c48495b9.camel@HansenPartnership.com> (raw)
In-Reply-To: <5e515f291a1a79c6564ad99824dd9b5bb03a0e94.camel@HansenPartnership.com>
On Wed, 2021-04-28 at 10:19 -0700, James Bottomley wrote:
> On Wed, 2021-04-28 at 16:56 +0200, Thore Sommer wrote:
> > TPM2 @ 0x0000000000000000
> > 0000: 54 50 4D 32 4C 00 00 00 04 7F 42 4F 43 48 53
> > 20 TPM2L.....BOCHS
> > 0010: 42 58 50 43 54 50 4D 32 01 00 00 00 42 58 50
> > 43 BXPCTPM2....BXPC
> > 0020: 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > 00 ................
> > 0030: 06 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > 00 ................
> > 0040: 00 00 01 00 00 C0 BB 7E 00 00 00
> > 00 .......~....
>
> This is actually pretty much exactly what I see in the working OVMF
>
> TPM2 @ 0x0000000000000000
> 0000: 54 50 4D 32 4C 00 00 00 04 DB 42 4F 43 48 53
> 20 TPM2L.....BOCHS
> 0010: 42 58 50 43 54 50 4D 32 01 00 00 00 42 58 50
> 43 BXPCTPM2....BXPC
> 0020: 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 ................
> 0030: 06 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 ................
> 0040: 00 00 01 00 00 60 BE 7F 00 00 00
> 00 .....`......
>
> So it looks like the empty acpi table theory doesn't fly.
Actually, there's another possibility, which is that you're not booting
via the efi stub. This is somewhat tricky to get right in grub, so you
can rule this out by booting ovmf to a shell and then executing vmlinuz
directly from the shell.
James
next prev parent reply other threads:[~2021-04-28 22:03 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-26 19:56 Problem: TPM 2.0 event log by OVMF is shown empty in Linux kernel versions after 5.8 Thore Sommer
2021-04-26 23:44 ` [edk2-devel] " James Bottomley
2021-04-27 7:40 ` Thore Sommer
2021-04-27 14:00 ` Lendacky, Thomas
2021-04-27 15:35 ` Thore Sommer
2021-04-27 16:28 ` James Bottomley
2021-04-28 11:47 ` Laszlo Ersek
2021-04-28 14:56 ` Thore Sommer
2021-04-28 17:19 ` James Bottomley
2021-04-28 20:31 ` Thore Sommer
2021-04-28 22:03 ` James Bottomley [this message]
2021-04-29 8:20 ` Thore Sommer
2021-04-29 9:43 ` Thore Sommer
2021-04-30 15:51 ` Laszlo Ersek
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