[edk2-devel] Problem: TPM 2.0 event log by OVMF is shown empty in Linux kernel versions after 5.8

[James Bottomley]

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.

James




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