From: Ye Li ye.li@nxp.com

issue: CAAM fails with key error when perform Modular Exponentiation using PKHA Block in CAAM

Fix: add flush and invalidate dcache for keys, signature and output decrypted data processed by CAAM.

Fixes: 34276478f7 (DM: crypto/fsl - Add Freescale rsa DM driver) Signed-off-by: Ye Li ye.li@nxp.com Reviewed-by: Gaurav Jain gaurav.jain@nxp.com Acked-by: Peng Fan peng.fan@nxp.com --- drivers/crypto/fsl/fsl_rsa.c | 9 +++++++++ 1 file changed, 9 insertions(+)

diff --git a/drivers/crypto/fsl/fsl_rsa.c b/drivers/crypto/fsl/fsl_rsa.c index 897ee855ea..38d4d5ddc4 100644 --- a/drivers/crypto/fsl/fsl_rsa.c +++ b/drivers/crypto/fsl/fsl_rsa.c @@ -36,12 +36,21 @@ int fsl_mod_exp(struct udevice *dev, const uint8_t *sig, uint32_t sig_len,

inline_cnstr_jobdesc_pkha_rsaexp(desc, &pkin, out, sig_len);

+ flush_dcache_range((ulong)sig, (ulong)sig + sig_len); + flush_dcache_range((ulong)prop->modulus, (ulong)(prop->modulus) + keylen); + flush_dcache_range((ulong)prop->public_exponent, + (ulong)(prop->public_exponent) + prop->exp_len); + flush_dcache_range((ulong)desc, (ulong)desc + (sizeof(uint32_t) * MAX_CAAM_DESCSIZE)); + flush_dcache_range((ulong)out, (ulong)out + sig_len); + ret = run_descriptor_jr(desc); if (ret) { debug("%s: RSA failed to verify: %d\n", __func__, ret); return -EFAULT; }

+ invalidate_dcache_range((ulong)out, (ulong)out + sig_len); + return 0; }