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tpm: Register TPM as entropy source

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TPM is defined as an entropy and is called every 10 seconds. However it
was not registered and calls were discarded.

Signed-off-by: Jean-François Hren <jean-francois.hren@stormshield.eu>

MFC after:	1 week
Pull Request:	https://github.com/freebsd/freebsd-src/pull/1398
This commit is contained in:
Jean-François Hren 2024-08-31 10:53:02 -07:00 committed by Kevin Bowling
parent e9a30c90d3
commit d7c87526b1
1 changed files with 2 additions and 0 deletions
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2
sys/dev/tpm/tpm20.c
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@ -206,6 +206,7 @@ tpm20_init(struct tpm_sc *sc)
tpm20_release(sc);
#ifdef TPM_HARVEST
random_harvest_register_source(RANDOM_PURE_TPM);
TIMEOUT_TASK_INIT(taskqueue_thread, &sc->harvest_task, 0,
tpm20_harvest, sc);
taskqueue_enqueue_timeout(taskqueue_thread, &sc->harvest_task, 0);
@ -222,6 +223,7 @@ tpm20_release(struct tpm_sc *sc)
#ifdef TPM_HARVEST
if (device_is_attached(sc->dev))
taskqueue_drain_timeout(taskqueue_thread, &sc->harvest_task);
random_harvest_deregister_source(RANDOM_PURE_TPM);
#endif
if (sc->buf != NULL)