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crypto/fsl: fsl_rsa: Fix dcache issue in the driver 

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>
This commit is contained in:
Ye Li 2022-09-28 15:49:02 +05:30 committed by Stefano Babic
parent 7fe2408b82
commit eda25c11b8
1 changed files with 10 additions and 0 deletions
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10
drivers/crypto/fsl/fsl_rsa.c
View File

@ -6,6 +6,7 @@
#include <config.h>
#include <common.h>
#include <cpu_func.h>
#include <dm.h>
#include <log.h>
#include <asm/types.h>
@ -36,12 +37,21 @@ 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;
}