diff options
| author | Sven Schwermer <sven@svenschwermer.de> | 2025-02-24 08:42:25 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2025-03-08 16:22:23 +0800 |
| commit | caa9dbb76ff52ec848a57245062aaeaa07740adc (patch) | |
| tree | 49b77f72e68fec1e7315c6e0c9188dca4f81a228 /drivers | |
| parent | d4880fe6fd5758e86fb8db1a8ea865d81b92e1f5 (diff) | |
crypto: mxs-dcp - Only set OTP_KEY bit for OTP key
While MXS_DCP_CONTROL0_OTP_KEY is set, the CRYPTO_KEY (DCP_PAES_KEY_OTP)
is used even if the UNIQUE_KEY (DCP_PAES_KEY_UNIQUE) is selected. This
is not clearly documented, but this implementation is consistent with
NXP's downstream kernel fork and optee_os.
Signed-off-by: Sven Schwermer <sven@svenschwermer.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/crypto/mxs-dcp.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/crypto/mxs-dcp.c b/drivers/crypto/mxs-dcp.c index d94a26c3541a..133ebc998236 100644 --- a/drivers/crypto/mxs-dcp.c +++ b/drivers/crypto/mxs-dcp.c @@ -265,12 +265,12 @@ static int mxs_dcp_run_aes(struct dcp_async_ctx *actx, MXS_DCP_CONTROL0_INTERRUPT | MXS_DCP_CONTROL0_ENABLE_CIPHER; - if (key_referenced) - /* Set OTP key bit to select the key via KEY_SELECT. */ - desc->control0 |= MXS_DCP_CONTROL0_OTP_KEY; - else + if (!key_referenced) /* Payload contains the key. */ desc->control0 |= MXS_DCP_CONTROL0_PAYLOAD_KEY; + else if (actx->key[0] == DCP_PAES_KEY_OTP) + /* Set OTP key bit to select the key via KEY_SELECT. */ + desc->control0 |= MXS_DCP_CONTROL0_OTP_KEY; if (rctx->enc) desc->control0 |= MXS_DCP_CONTROL0_CIPHER_ENCRYPT; |