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>
diff --git a/drivers/crypto/fsl/fsl_rsa.c b/drivers/crypto/fsl/fsl_rsa.c
index 897ee85..335b7fe 100644
--- a/drivers/crypto/fsl/fsl_rsa.c
+++ b/drivers/crypto/fsl/fsl_rsa.c
@@ -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 @@
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;
}