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| author | Jerry Snitselaar <jsnitsel@redhat.com> | 2023-06-29 13:41:47 -0700 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko@kernel.org> | 2023-07-17 19:40:22 +0000 |
| commit | ecff6813d2bcf0c670881a9ba3f51cb032dd405a (patch) | |
| tree | 08951b08995ec800a1b7bf2a5870cd2e9312d53a /drivers/char/tpm | |
| parent | d55901522f96082a43b9842d34867363c0cdbac5 (diff) | |
| download | linux-ecff6813d2bcf0c670881a9ba3f51cb032dd405a.tar.gz | |
tpm: return false from tpm_amd_is_rng_defective on non-x86 platforms
tpm_amd_is_rng_defective is for dealing with an issue related to the
AMD firmware TPM, so on non-x86 architectures just have it inline and
return false.
Cc: stable@vger.kernel.org # v6.3+
Reported-by: Sachin Sant <sachinp@linux.ibm.com>
Reported-by: Aneesh Kumar K. V <aneesh.kumar@linux.ibm.com>
Closes: https://lore.kernel.org/lkml/99B81401-DB46-49B9-B321-CF832B50CAC3@linux.ibm.com/
Fixes: f1324bbc4011 ("tpm: disable hwrng for fTPM on some AMD designs")
Signed-off-by: Jerry Snitselaar <jsnitsel@redhat.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Diffstat (limited to 'drivers/char/tpm')
| -rw-r--r-- | drivers/char/tpm/tpm-chip.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c index cd48033b804a3..cf5499e51999b 100644 --- a/drivers/char/tpm/tpm-chip.c +++ b/drivers/char/tpm/tpm-chip.c @@ -518,6 +518,7 @@ static int tpm_add_legacy_sysfs(struct tpm_chip *chip) * 6.x.y.z series: 6.0.18.6 + * 3.x.y.z series: 3.57.y.5 + */ +#ifdef CONFIG_X86 static bool tpm_amd_is_rng_defective(struct tpm_chip *chip) { u32 val1, val2; @@ -566,6 +567,12 @@ release: return true; } +#else +static inline bool tpm_amd_is_rng_defective(struct tpm_chip *chip) +{ + return false; +} +#endif /* CONFIG_X86 */ static int tpm_hwrng_read(struct hwrng *rng, void *data, size_t max, bool wait) { |