Hi Gonglei,
...
> +
> +static int virtio_crypto_alg_ablkcipher_init_session(
> + struct virtio_crypto_ablkcipher_ctx *ctx,
> + int alg, const uint8_t *key,
> + unsigned int keylen,
> + int encrypt)
> +{
> + struct scatterlist outhdr, key_sg, inhdr, *sgs[3];
> + unsigned int tmp;
> + struct virtio_crypto_session_input input;
> + struct virtio_crypto_op_ctrl_req ctrl;
> + struct virtio_crypto *vcrypto = ctx->vcrypto;
> + int op = encrypt ? VIRTIO_CRYPTO_OP_ENCRYPT :
> VIRTIO_CRYPTO_OP_DECRYPT;
> + int err;
> + unsigned int num_out = 0, num_in = 0;
> +
> + memset(&ctrl, 0, sizeof(ctrl));
> + memset(&input, 0, sizeof(input));
> + /* Pad ctrl header */
> + ctrl.header.opcode =
> cpu_to_le32(VIRTIO_CRYPTO_CIPHER_CREATE_SESSION);
> + ctrl.header.algo = cpu_to_le32((uint32_t)alg);
> + /* Set the default dataqueue id to 0 */
> + ctrl.header.queue_id = 0;
> +
> + input.status = cpu_to_le32(VIRTIO_CRYPTO_ERR);
> + /* Pad cipher's parameters */
> + ctrl.u.sym_create_session.op_type =
> + cpu_to_le32(VIRTIO_CRYPTO_SYM_OP_CIPHER);
> + ctrl.u.sym_create_session.u.cipher.para.algo = ctrl.header.algo;
> + ctrl.u.sym_create_session.u.cipher.para.keylen =
> cpu_to_le32(keylen);
> + ctrl.u.sym_create_session.u.cipher.para.op = cpu_to_le32(op);
> +
> + sg_init_one(&outhdr, &ctrl, sizeof(ctrl));
I believe this won't work when the new virtually-mapped kernel stack (VMAP_STACK)
is enabled.
Regards,
Salvatore
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