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units: also require /dev/tpm0 to be around before tpm2.target can be reached

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While we typically just use /dev/tpmrm0 for accessing the TPM chip (i.e
via the kernel's own resource manager), some sysfs properties that
matter are on /dev/tpm0 only (i.e. the version without the kernel TPM
resource manager). Hence, wait for both to show up in tpm2.target, so
that we can be sure the full API is available.

This matters because we want to access /sys/class/tpm/tpm0/ppi/request
in the next commit.
This commit is contained in:
Lennart Poettering
2025-02-26 22:41:34 +01:00
parent 41d9ed93d9
commit daae8f858d
1 changed files with 2 additions and 2 deletions
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units/tpm2.target
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@@ -12,5 +12,5 @@ Description=Trusted Platform Module
Documentation=man:systemd.special(7)
# Make this a synchronization point on the first TPM device found
After=dev-tpmrm0.device
Wants=dev-tpmrm0.device
After=dev-tpmrm0.device dev-tpm0.device
Wants=dev-tpmrm0.device dev-tpm0.device