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tpm: return false from tpm_amd_is_rng_defective on non-x86 platforms

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commit ecff6813d2 upstream.

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: f1324bbc40 ("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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jerry Snitselaar 2023-06-29 13:41:47 -07:00 committed by Greg Kroah-Hartman
parent 70c001a67e
commit 15914c95e2
1 changed files with 7 additions and 0 deletions
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7
drivers/char/tpm/tpm-chip.c
View file

@ -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 @@ static bool tpm_amd_is_rng_defective(struct tpm_chip *chip)
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)
{