We need the op_code to identify which of crypto
operations for stateless crypto operation.

Let's add it.

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
---
 backends/cryptodev-builtin.c | 7 +++++++
 include/sysemu/cryptodev.h   | 3 +++
 2 files changed, 10 insertions(+)

diff --git a/backends/cryptodev-builtin.c b/backends/cryptodev-builtin.c
index abc2655..1e72985 100644
--- a/backends/cryptodev-builtin.c
+++ b/backends/cryptodev-builtin.c
@@ -334,6 +334,13 @@ static int cryptodev_builtin_sym_operation(
         return -VIRTIO_CRYPTO_NOTSUPP;
     }
 
+    if (op_info->op_code != VIRTIO_CRYPTO_CIPHER_ENCRYPT &&
+        op_info->op_code != VIRTIO_CRYPTO_CIPHER_DECRYPT) {
+        error_setg(errp,
+               "Unsupported op code: %u", op_info->op_code);
+        return -VIRTIO_CRYPTO_NOTSUPP;
+    }
+
     sess = builtin->sessions[op_info->session_id];
 
     if (op_info->iv_len > 0) {
diff --git a/include/sysemu/cryptodev.h b/include/sysemu/cryptodev.h
index be507f7..d75f2e7 100644
--- a/include/sysemu/cryptodev.h
+++ b/include/sysemu/cryptodev.h
@@ -103,6 +103,7 @@ typedef struct CryptoDevBackendSymSessionInfo {
  *
  * @session_id: session index which was previously
  *              created by cryptodev_backend_sym_create_session()
+ * @op_code: operation code (refer to virtio_crypto.h)
  * @aad_len: byte length of additional authenticated data
  * @iv_len: byte length of initialization vector or counter
  * @src_len: byte length of source data
@@ -129,6 +130,8 @@ typedef struct CryptoDevBackendSymSessionInfo {
  */
 typedef struct CryptoDevBackendSymOpInfo {
     uint64_t session_id;
+    /* corresponding with virtio crypto spec */
+    uint32_t op_code;
     uint32_t aad_len;
     uint32_t iv_len;
     uint32_t src_len;
-- 
1.8.3.1