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qemu/hw/virtio/virtio-crypto.c
Haoqian He bc85aae420 vhost-user: return failure if backend crash when live migration 
Live migration should be terminated if the vhost-user backend crashes
before the migration completes.

Specifically, since the vhost device will be stopped when VM is stopped
before the end of the live migration, in current implementation if the
backend crashes, vhost-user device set_status() won't return failure,
live migration won't perceive the disconnection between QEMU and the
backend.

When the VM is migrated to the destination, the inflight IO will be
resubmitted, and if the IO was completed out of order before, it will
cause IO error.

To fix this issue:
1. Add the return value to set_status() for VirtioDeviceClass.
  a. For the vhost-user device, return failure when the backend crashes.
  b. For other virtio devices, always return 0.
2. Return failure if vhost_dev_stop() failed for vhost-user device.

If QEMU loses connection with the vhost-user backend, virtio set_status()
can return failure to the upper layer, migration_completion() can handle
the error, terminate the live migration, and restore the VM, so that
inflight IO can be completed normally.

Signed-off-by: Haoqian He <haoqian.he@smartx.com>
Message-Id: <20250416024729.3289157-4-haoqian.he@smartx.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2025-05-14 05:39:15 -04:00

1311 lines
43 KiB
C
Raw Blame History

/*
* Virtio crypto Support
*
* Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
*
* Authors:
* Gonglei <arei.gonglei@huawei.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or
* (at your option) any later version. See the COPYING file in the
* top-level directory.
*/
#include "qemu/osdep.h"
#include "qemu/iov.h"
#include "qemu/main-loop.h"
#include "qemu/module.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "hw/virtio/virtio.h"
#include "hw/virtio/virtio-crypto.h"
#include "hw/qdev-properties.h"
#include "standard-headers/linux/virtio_ids.h"
#include "system/cryptodev-vhost.h"
#define VIRTIO_CRYPTO_VM_VERSION 1
typedef struct VirtIOCryptoSessionReq {
VirtIODevice *vdev;
VirtQueue *vq;
VirtQueueElement *elem;
CryptoDevBackendSessionInfo info;
CryptoDevCompletionFunc cb;
} VirtIOCryptoSessionReq;
static void virtio_crypto_free_create_session_req(VirtIOCryptoSessionReq *sreq)
{
switch (sreq->info.op_code) {
case VIRTIO_CRYPTO_CIPHER_CREATE_SESSION:
g_free(sreq->info.u.sym_sess_info.cipher_key);
g_free(sreq->info.u.sym_sess_info.auth_key);
break;
case VIRTIO_CRYPTO_AKCIPHER_CREATE_SESSION:
g_free(sreq->info.u.asym_sess_info.key);
break;
case VIRTIO_CRYPTO_CIPHER_DESTROY_SESSION:
case VIRTIO_CRYPTO_HASH_DESTROY_SESSION:
case VIRTIO_CRYPTO_MAC_DESTROY_SESSION:
case VIRTIO_CRYPTO_AEAD_DESTROY_SESSION:
case VIRTIO_CRYPTO_AKCIPHER_DESTROY_SESSION:
break;
default:
error_report("Unknown opcode: %u", sreq->info.op_code);
}
g_free(sreq);
}
/*
* Transfer virtqueue index to crypto queue index.
* The control virtqueue is after the data virtqueues
* so the input value doesn't need to be adjusted
*/
static inline int virtio_crypto_vq2q(int queue_index)
{
return queue_index;
}
static int
virtio_crypto_cipher_session_helper(VirtIODevice *vdev,
CryptoDevBackendSymSessionInfo *info,
struct virtio_crypto_cipher_session_para *cipher_para,
struct iovec **iov, unsigned int *out_num)
{
VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
unsigned int num = *out_num;
info->cipher_alg = ldl_le_p(&cipher_para->algo);
info->key_len = ldl_le_p(&cipher_para->keylen);
info->direction = ldl_le_p(&cipher_para->op);
DPRINTF("cipher_alg=%" PRIu32 ", info->direction=%" PRIu32 "\n",
info->cipher_alg, info->direction);
if (info->key_len > vcrypto->conf.max_cipher_key_len) {
error_report("virtio-crypto length of cipher key is too big: %u",
info->key_len);
return -VIRTIO_CRYPTO_ERR;
}
/* Get cipher key */
if (info->key_len > 0) {
size_t s;
DPRINTF("keylen=%" PRIu32 "\n", info->key_len);
info->cipher_key = g_malloc(info->key_len);
s = iov_to_buf(*iov, num, 0, info->cipher_key, info->key_len);
if (unlikely(s != info->key_len)) {
virtio_error(vdev, "virtio-crypto cipher key incorrect");
return -EFAULT;
}
iov_discard_front(iov, &num, info->key_len);
*out_num = num;
}
return 0;
}
static int
virtio_crypto_create_sym_session(VirtIOCrypto *vcrypto,
struct virtio_crypto_sym_create_session_req *sess_req,
uint32_t queue_id,
uint32_t opcode,
struct iovec *iov, unsigned int out_num,
VirtIOCryptoSessionReq *sreq)
{
VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto);
CryptoDevBackendSymSessionInfo *sym_info = &sreq->info.u.sym_sess_info;
int queue_index;
uint32_t op_type;
int ret;
op_type = ldl_le_p(&sess_req->op_type);
sreq->info.op_code = opcode;
sym_info = &sreq->info.u.sym_sess_info;
sym_info->op_type = op_type;
if (op_type == VIRTIO_CRYPTO_SYM_OP_CIPHER) {
ret = virtio_crypto_cipher_session_helper(vdev, sym_info,
&sess_req->u.cipher.para,
&iov, &out_num);
if (ret < 0) {
return ret;
}
} else if (op_type == VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING) {
size_t s;
/* cipher part */
ret = virtio_crypto_cipher_session_helper(vdev, sym_info,
&sess_req->u.chain.para.cipher_param,
&iov, &out_num);
if (ret < 0) {
return ret;
}
/* hash part */
sym_info->alg_chain_order = ldl_le_p(
&sess_req->u.chain.para.alg_chain_order);
sym_info->add_len = ldl_le_p(&sess_req->u.chain.para.aad_len);
sym_info->hash_mode = ldl_le_p(&sess_req->u.chain.para.hash_mode);
if (sym_info->hash_mode == VIRTIO_CRYPTO_SYM_HASH_MODE_AUTH) {
sym_info->hash_alg =
ldl_le_p(&sess_req->u.chain.para.u.mac_param.algo);
sym_info->auth_key_len = ldl_le_p(
&sess_req->u.chain.para.u.mac_param.auth_key_len);
sym_info->hash_result_len = ldl_le_p(
&sess_req->u.chain.para.u.mac_param.hash_result_len);
if (sym_info->auth_key_len > vcrypto->conf.max_auth_key_len) {
error_report("virtio-crypto length of auth key is too big: %u",
sym_info->auth_key_len);
return -VIRTIO_CRYPTO_ERR;
}
/* get auth key */
if (sym_info->auth_key_len > 0) {
sym_info->auth_key = g_malloc(sym_info->auth_key_len);
s = iov_to_buf(iov, out_num, 0, sym_info->auth_key,
sym_info->auth_key_len);
if (unlikely(s != sym_info->auth_key_len)) {
virtio_error(vdev,
"virtio-crypto authenticated key incorrect");
return -EFAULT;
}
iov_discard_front(&iov, &out_num, sym_info->auth_key_len);
}
} else if (sym_info->hash_mode == VIRTIO_CRYPTO_SYM_HASH_MODE_PLAIN) {
sym_info->hash_alg = ldl_le_p(
&sess_req->u.chain.para.u.hash_param.algo);
sym_info->hash_result_len = ldl_le_p(
&sess_req->u.chain.para.u.hash_param.hash_result_len);
} else {
/* VIRTIO_CRYPTO_SYM_HASH_MODE_NESTED */
error_report("unsupported hash mode");
return -VIRTIO_CRYPTO_NOTSUPP;
}
} else {
/* VIRTIO_CRYPTO_SYM_OP_NONE */
error_report("unsupported cipher op_type: VIRTIO_CRYPTO_SYM_OP_NONE");
return -VIRTIO_CRYPTO_NOTSUPP;
}
queue_index = virtio_crypto_vq2q(queue_id);
return cryptodev_backend_create_session(vcrypto->cryptodev, &sreq->info,
queue_index, sreq->cb, sreq);
}
static int
virtio_crypto_create_asym_session(VirtIOCrypto *vcrypto,
struct virtio_crypto_akcipher_create_session_req *sess_req,
uint32_t queue_id, uint32_t opcode,
struct iovec *iov, unsigned int out_num,
VirtIOCryptoSessionReq *sreq)
{
VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto);
CryptoDevBackendAsymSessionInfo *asym_info = &sreq->info.u.asym_sess_info;
int queue_index;
uint32_t algo, keytype, keylen;
sreq->info.op_code = opcode;
algo = ldl_le_p(&sess_req->para.algo);
keytype = ldl_le_p(&sess_req->para.keytype);
keylen = ldl_le_p(&sess_req->para.keylen);
if ((keytype != VIRTIO_CRYPTO_AKCIPHER_KEY_TYPE_PUBLIC)
&& (keytype != VIRTIO_CRYPTO_AKCIPHER_KEY_TYPE_PRIVATE)) {
error_report("unsupported asym keytype: %d", keytype);
return -VIRTIO_CRYPTO_NOTSUPP;
}
if (keylen) {
asym_info->key = g_malloc(keylen);
if (iov_to_buf(iov, out_num, 0, asym_info->key, keylen) != keylen) {
virtio_error(vdev, "virtio-crypto asym key incorrect");
return -EFAULT;
}
iov_discard_front(&iov, &out_num, keylen);
}
asym_info = &sreq->info.u.asym_sess_info;
asym_info->algo = algo;
asym_info->keytype = keytype;
asym_info->keylen = keylen;
switch (asym_info->algo) {
case VIRTIO_CRYPTO_AKCIPHER_RSA:
asym_info->u.rsa.padding_algo =
ldl_le_p(&sess_req->para.u.rsa.padding_algo);
asym_info->u.rsa.hash_algo =
ldl_le_p(&sess_req->para.u.rsa.hash_algo);
break;
/* TODO DSA&ECDSA handling */
default:
return -VIRTIO_CRYPTO_ERR;
}
queue_index = virtio_crypto_vq2q(queue_id);
return cryptodev_backend_create_session(vcrypto->cryptodev, &sreq->info,
queue_index, sreq->cb, sreq);
}
static int
virtio_crypto_handle_close_session(VirtIOCrypto *vcrypto,
struct virtio_crypto_destroy_session_req *close_sess_req,
uint32_t queue_id,
VirtIOCryptoSessionReq *sreq)
{
uint64_t session_id;
session_id = ldq_le_p(&close_sess_req->session_id);
DPRINTF("close session, id=%" PRIu64 "\n", session_id);
return cryptodev_backend_close_session(
vcrypto->cryptodev, session_id, queue_id, sreq->cb, sreq);
}
static void virtio_crypto_create_session_completion(void *opaque, int ret)
{
VirtIOCryptoSessionReq *sreq = (VirtIOCryptoSessionReq *)opaque;
VirtQueue *vq = sreq->vq;
VirtQueueElement *elem = sreq->elem;
VirtIODevice *vdev = sreq->vdev;
struct virtio_crypto_session_input input;
struct iovec *in_iov = elem->in_sg;
unsigned in_num = elem->in_num;
size_t s;
memset(&input, 0, sizeof(input));
/* Serious errors, need to reset virtio crypto device */
if (ret == -EFAULT) {
virtqueue_detach_element(vq, elem, 0);
goto out;
} else if (ret == -VIRTIO_CRYPTO_NOTSUPP) {
stl_le_p(&input.status, VIRTIO_CRYPTO_NOTSUPP);
} else if (ret == -VIRTIO_CRYPTO_KEY_REJECTED) {
stl_le_p(&input.status, VIRTIO_CRYPTO_KEY_REJECTED);
} else if (ret != VIRTIO_CRYPTO_OK) {
stl_le_p(&input.status, VIRTIO_CRYPTO_ERR);
} else {
/* Set the session id */
stq_le_p(&input.session_id, sreq->info.session_id);
stl_le_p(&input.status, VIRTIO_CRYPTO_OK);
}
s = iov_from_buf(in_iov, in_num, 0, &input, sizeof(input));
if (unlikely(s != sizeof(input))) {
virtio_error(vdev, "virtio-crypto input incorrect");
virtqueue_detach_element(vq, elem, 0);
goto out;
}
virtqueue_push(vq, elem, sizeof(input));
virtio_notify(vdev, vq);
out:
g_free(elem);
virtio_crypto_free_create_session_req(sreq);
}
static void virtio_crypto_destroy_session_completion(void *opaque, int ret)
{
VirtIOCryptoSessionReq *sreq = (VirtIOCryptoSessionReq *)opaque;
VirtQueue *vq = sreq->vq;
VirtQueueElement *elem = sreq->elem;
VirtIODevice *vdev = sreq->vdev;
struct iovec *in_iov = elem->in_sg;
unsigned in_num = elem->in_num;
uint8_t status;
size_t s;
if (ret < 0) {
status = VIRTIO_CRYPTO_ERR;
} else {
status = VIRTIO_CRYPTO_OK;
}
s = iov_from_buf(in_iov, in_num, 0, &status, sizeof(status));
if (unlikely(s != sizeof(status))) {
virtio_error(vdev, "virtio-crypto status incorrect");
virtqueue_detach_element(vq, elem, 0);
goto out;
}
virtqueue_push(vq, elem, sizeof(status));
virtio_notify(vdev, vq);
out:
g_free(elem);
g_free(sreq);
}
static void virtio_crypto_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
{
VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
struct virtio_crypto_op_ctrl_req ctrl;
VirtQueueElement *elem;
VirtIOCryptoSessionReq *sreq;
unsigned out_num;
unsigned in_num;
uint32_t queue_id;
uint32_t opcode;
struct virtio_crypto_session_input input;
size_t s;
int ret;
struct iovec *out_iov;
struct iovec *in_iov;
for (;;) {
g_autofree struct iovec *out_iov_copy = NULL;
elem = virtqueue_pop(vq, sizeof(VirtQueueElement));
if (!elem) {
break;
}
if (elem->out_num < 1 || elem->in_num < 1) {
virtio_error(vdev, "virtio-crypto ctrl missing headers");
virtqueue_detach_element(vq, elem, 0);
g_free(elem);
break;
}
out_num = elem->out_num;
out_iov_copy = g_memdup2(elem->out_sg, sizeof(out_iov[0]) * out_num);
out_iov = out_iov_copy;
in_num = elem->in_num;
in_iov = elem->in_sg;
if (unlikely(iov_to_buf(out_iov, out_num, 0, &ctrl, sizeof(ctrl))
!= sizeof(ctrl))) {
virtio_error(vdev, "virtio-crypto request ctrl_hdr too short");
virtqueue_detach_element(vq, elem, 0);
g_free(elem);
break;
}
iov_discard_front(&out_iov, &out_num, sizeof(ctrl));
opcode = ldl_le_p(&ctrl.header.opcode);
queue_id = ldl_le_p(&ctrl.header.queue_id);
sreq = g_new0(VirtIOCryptoSessionReq, 1);
sreq->vdev = vdev;
sreq->vq = vq;
sreq->elem = elem;
switch (opcode) {
case VIRTIO_CRYPTO_CIPHER_CREATE_SESSION:
sreq->cb = virtio_crypto_create_session_completion;
ret = virtio_crypto_create_sym_session(vcrypto,
&ctrl.u.sym_create_session,
queue_id, opcode,
out_iov, out_num,
sreq);
if (ret < 0) {
virtio_crypto_create_session_completion(sreq, ret);
}
break;
case VIRTIO_CRYPTO_AKCIPHER_CREATE_SESSION:
sreq->cb = virtio_crypto_create_session_completion;
ret = virtio_crypto_create_asym_session(vcrypto,
&ctrl.u.akcipher_create_session,
queue_id, opcode,
out_iov, out_num,
sreq);
if (ret < 0) {
virtio_crypto_create_session_completion(sreq, ret);
}
break;
case VIRTIO_CRYPTO_CIPHER_DESTROY_SESSION:
case VIRTIO_CRYPTO_HASH_DESTROY_SESSION:
case VIRTIO_CRYPTO_MAC_DESTROY_SESSION:
case VIRTIO_CRYPTO_AEAD_DESTROY_SESSION:
case VIRTIO_CRYPTO_AKCIPHER_DESTROY_SESSION:
sreq->cb = virtio_crypto_destroy_session_completion;
ret = virtio_crypto_handle_close_session(vcrypto,
&ctrl.u.destroy_session, queue_id,
sreq);
if (ret < 0) {
virtio_crypto_destroy_session_completion(sreq, ret);
}
break;
case VIRTIO_CRYPTO_HASH_CREATE_SESSION:
case VIRTIO_CRYPTO_MAC_CREATE_SESSION:
case VIRTIO_CRYPTO_AEAD_CREATE_SESSION:
default:
memset(&input, 0, sizeof(input));
error_report("virtio-crypto unsupported ctrl opcode: %d", opcode);
stl_le_p(&input.status, VIRTIO_CRYPTO_NOTSUPP);
s = iov_from_buf(in_iov, in_num, 0, &input, sizeof(input));
if (unlikely(s != sizeof(input))) {
virtio_error(vdev, "virtio-crypto input incorrect");
virtqueue_detach_element(vq, elem, 0);
} else {
virtqueue_push(vq, elem, sizeof(input));
virtio_notify(vdev, vq);
}
g_free(sreq);
g_free(elem);
break;
} /* end switch case */
} /* end for loop */
}
static void virtio_crypto_init_request(VirtIOCrypto *vcrypto, VirtQueue *vq,
VirtIOCryptoReq *req)
{
req->vcrypto = vcrypto;
req->vq = vq;
req->in = NULL;
req->in_iov = NULL;
req->in_num = 0;
req->in_len = 0;
req->flags = QCRYPTODEV_BACKEND_ALGO_TYPE__MAX;
memset(&req->op_info, 0x00, sizeof(req->op_info));
}
static void virtio_crypto_free_request(VirtIOCryptoReq *req)
{
if (!req) {
return;
}
if (req->flags == QCRYPTODEV_BACKEND_ALGO_TYPE_SYM) {
size_t max_len;
CryptoDevBackendSymOpInfo *op_info = req->op_info.u.sym_op_info;
if (op_info) {
max_len = op_info->iv_len +
op_info->aad_len +
op_info->src_len +
op_info->dst_len +
op_info->digest_result_len;
/* Zeroize and free request data structure */
memset(op_info, 0, sizeof(*op_info) + max_len);
g_free(op_info);
}
} else if (req->flags == QCRYPTODEV_BACKEND_ALGO_TYPE_ASYM) {
CryptoDevBackendAsymOpInfo *op_info = req->op_info.u.asym_op_info;
if (op_info) {
g_free(op_info->src);
g_free(op_info->dst);
memset(op_info, 0, sizeof(*op_info));
g_free(op_info);
}
}
g_free(req->in_iov);
g_free(req);
}
static void
virtio_crypto_sym_input_data_helper(VirtIODevice *vdev,
VirtIOCryptoReq *req,
uint32_t status,
CryptoDevBackendSymOpInfo *sym_op_info)
{
size_t s, len;
struct iovec *in_iov = req->in_iov;
if (status != VIRTIO_CRYPTO_OK) {
return;
}
len = sym_op_info->src_len;
/* Save the cipher result */
s = iov_from_buf(in_iov, req->in_num, 0, sym_op_info->dst, len);
if (s != len) {
virtio_error(vdev, "virtio-crypto dest data incorrect");
return;
}
iov_discard_front(&in_iov, &req->in_num, len);
if (sym_op_info->op_type ==
VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING) {
/* Save the digest result */
s = iov_from_buf(in_iov, req->in_num, 0,
sym_op_info->digest_result,
sym_op_info->digest_result_len);
if (s != sym_op_info->digest_result_len) {
virtio_error(vdev, "virtio-crypto digest result incorrect");
}
}
}
static void
virtio_crypto_akcipher_input_data_helper(VirtIODevice *vdev,
VirtIOCryptoReq *req, int32_t status,
CryptoDevBackendAsymOpInfo *asym_op_info)
{
size_t s, len;
struct iovec *in_iov = req->in_iov;
if (status != VIRTIO_CRYPTO_OK) {
return;
}
len = asym_op_info->dst_len;
if (!len) {
return;
}
s = iov_from_buf(in_iov, req->in_num, 0, asym_op_info->dst, len);
if (s != len) {
virtio_error(vdev, "virtio-crypto asym dest data incorrect");
return;
}
iov_discard_front(&in_iov, &req->in_num, len);
/* For akcipher, dst_len may be changed after operation */
req->in_len = sizeof(struct virtio_crypto_inhdr) + asym_op_info->dst_len;
}
static void virtio_crypto_req_complete(void *opaque, int ret)
{
VirtIOCryptoReq *req = (VirtIOCryptoReq *)opaque;
VirtIOCrypto *vcrypto = req->vcrypto;
VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto);
uint8_t status = -ret;
if (req->flags == QCRYPTODEV_BACKEND_ALGO_TYPE_SYM) {
virtio_crypto_sym_input_data_helper(vdev, req, status,
req->op_info.u.sym_op_info);
} else if (req->flags == QCRYPTODEV_BACKEND_ALGO_TYPE_ASYM) {
virtio_crypto_akcipher_input_data_helper(vdev, req, status,
req->op_info.u.asym_op_info);
}
stb_p(&req->in->status, status);
virtqueue_push(req->vq, &req->elem, req->in_len);
virtio_notify(vdev, req->vq);
virtio_crypto_free_request(req);
}
static VirtIOCryptoReq *
virtio_crypto_get_request(VirtIOCrypto *s, VirtQueue *vq)
{
VirtIOCryptoReq *req = virtqueue_pop(vq, sizeof(VirtIOCryptoReq));
if (req) {
virtio_crypto_init_request(s, vq, req);
}
return req;
}
static CryptoDevBackendSymOpInfo *
virtio_crypto_sym_op_helper(VirtIODevice *vdev,
struct virtio_crypto_cipher_para *cipher_para,
struct virtio_crypto_alg_chain_data_para *alg_chain_para,
struct iovec *iov, unsigned int out_num)
{
VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
CryptoDevBackendSymOpInfo *op_info;
uint32_t src_len = 0, dst_len = 0;
uint32_t iv_len = 0;
uint32_t aad_len = 0, hash_result_len = 0;
uint32_t hash_start_src_offset = 0, len_to_hash = 0;
uint32_t cipher_start_src_offset = 0, len_to_cipher = 0;
uint64_t max_len, curr_size = 0;
size_t s;
/* Plain cipher */
if (cipher_para) {
iv_len = ldl_le_p(&cipher_para->iv_len);
src_len = ldl_le_p(&cipher_para->src_data_len);
dst_len = ldl_le_p(&cipher_para->dst_data_len);
} else if (alg_chain_para) { /* Algorithm chain */
iv_len = ldl_le_p(&alg_chain_para->iv_len);
src_len = ldl_le_p(&alg_chain_para->src_data_len);
dst_len = ldl_le_p(&alg_chain_para->dst_data_len);
aad_len = ldl_le_p(&alg_chain_para->aad_len);
hash_result_len = ldl_le_p(&alg_chain_para->hash_result_len);
hash_start_src_offset = ldl_le_p(
&alg_chain_para->hash_start_src_offset);
cipher_start_src_offset = ldl_le_p(
&alg_chain_para->cipher_start_src_offset);
len_to_cipher = ldl_le_p(&alg_chain_para->len_to_cipher);
len_to_hash = ldl_le_p(&alg_chain_para->len_to_hash);
} else {
return NULL;
}
if (unlikely(src_len != dst_len)) {
virtio_error(vdev, "sym request src len is different from dst len");
return NULL;
}
max_len = (uint64_t)iv_len + aad_len + src_len + dst_len + hash_result_len;
if (unlikely(max_len > vcrypto->conf.max_size)) {
virtio_error(vdev, "virtio-crypto too big length");
return NULL;
}
op_info = g_malloc0(sizeof(CryptoDevBackendSymOpInfo) + max_len);
op_info->iv_len = iv_len;
op_info->src_len = src_len;
op_info->dst_len = dst_len;
op_info->aad_len = aad_len;
op_info->digest_result_len = hash_result_len;
op_info->hash_start_src_offset = hash_start_src_offset;
op_info->len_to_hash = len_to_hash;
op_info->cipher_start_src_offset = cipher_start_src_offset;
op_info->len_to_cipher = len_to_cipher;
/* Handle the initialization vector */
if (op_info->iv_len > 0) {
DPRINTF("iv_len=%" PRIu32 "\n", op_info->iv_len);
op_info->iv = op_info->data + curr_size;
s = iov_to_buf(iov, out_num, 0, op_info->iv, op_info->iv_len);
if (unlikely(s != op_info->iv_len)) {
virtio_error(vdev, "virtio-crypto iv incorrect");
goto err;
}
iov_discard_front(&iov, &out_num, op_info->iv_len);
curr_size += op_info->iv_len;
}
/* Handle additional authentication data if exists */
if (op_info->aad_len > 0) {
DPRINTF("aad_len=%" PRIu32 "\n", op_info->aad_len);
op_info->aad_data = op_info->data + curr_size;
s = iov_to_buf(iov, out_num, 0, op_info->aad_data, op_info->aad_len);
if (unlikely(s != op_info->aad_len)) {
virtio_error(vdev, "virtio-crypto additional auth data incorrect");
goto err;
}
iov_discard_front(&iov, &out_num, op_info->aad_len);
curr_size += op_info->aad_len;
}
/* Handle the source data */
if (op_info->src_len > 0) {
DPRINTF("src_len=%" PRIu32 "\n", op_info->src_len);
op_info->src = op_info->data + curr_size;
s = iov_to_buf(iov, out_num, 0, op_info->src, op_info->src_len);
if (unlikely(s != op_info->src_len)) {
virtio_error(vdev, "virtio-crypto source data incorrect");
goto err;
}
iov_discard_front(&iov, &out_num, op_info->src_len);
curr_size += op_info->src_len;
}
/* Handle the destination data */
op_info->dst = op_info->data + curr_size;
curr_size += op_info->dst_len;
DPRINTF("dst_len=%" PRIu32 "\n", op_info->dst_len);
/* Handle the hash digest result */
if (hash_result_len > 0) {
DPRINTF("hash_result_len=%" PRIu32 "\n", hash_result_len);
op_info->digest_result = op_info->data + curr_size;
}
return op_info;
err:
g_free(op_info);
return NULL;
}
static int
virtio_crypto_handle_sym_req(VirtIOCrypto *vcrypto,
struct virtio_crypto_sym_data_req *req,
CryptoDevBackendOpInfo *op_info,
struct iovec *iov, unsigned int out_num)
{
VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto);
CryptoDevBackendSymOpInfo *sym_op_info;
uint32_t op_type;
op_type = ldl_le_p(&req->op_type);
if (op_type == VIRTIO_CRYPTO_SYM_OP_CIPHER) {
sym_op_info = virtio_crypto_sym_op_helper(vdev, &req->u.cipher.para,
NULL, iov, out_num);
if (!sym_op_info) {
return -EFAULT;
}
} else if (op_type == VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING) {
sym_op_info = virtio_crypto_sym_op_helper(vdev, NULL,
&req->u.chain.para,
iov, out_num);
if (!sym_op_info) {
return -EFAULT;
}
} else {
/* VIRTIO_CRYPTO_SYM_OP_NONE */
error_report("virtio-crypto unsupported cipher type");
return -VIRTIO_CRYPTO_NOTSUPP;
}
sym_op_info->op_type = op_type;
op_info->u.sym_op_info = sym_op_info;
return 0;
}
static int
virtio_crypto_handle_asym_req(VirtIOCrypto *vcrypto,
struct virtio_crypto_akcipher_data_req *req,
CryptoDevBackendOpInfo *op_info,
struct iovec *iov, unsigned int out_num)
{
VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto);
CryptoDevBackendAsymOpInfo *asym_op_info;
uint32_t src_len;
uint32_t dst_len;
uint32_t len;
uint8_t *src = NULL;
uint8_t *dst = NULL;
asym_op_info = g_new0(CryptoDevBackendAsymOpInfo, 1);
src_len = ldl_le_p(&req->para.src_data_len);
dst_len = ldl_le_p(&req->para.dst_data_len);
if (src_len > 0) {
src = g_malloc0(src_len);
len = iov_to_buf(iov, out_num, 0, src, src_len);
if (unlikely(len != src_len)) {
virtio_error(vdev, "virtio-crypto asym src data incorrect"
"expected %u, actual %u", src_len, len);
goto err;
}
iov_discard_front(&iov, &out_num, src_len);
}
if (dst_len > 0) {
dst = g_malloc0(dst_len);
if (op_info->op_code == VIRTIO_CRYPTO_AKCIPHER_VERIFY) {
len = iov_to_buf(iov, out_num, 0, dst, dst_len);
if (unlikely(len != dst_len)) {
virtio_error(vdev, "virtio-crypto asym dst data incorrect"
"expected %u, actual %u", dst_len, len);
goto err;
}
iov_discard_front(&iov, &out_num, dst_len);
}
}
asym_op_info->src_len = src_len;
asym_op_info->dst_len = dst_len;
asym_op_info->src = src;
asym_op_info->dst = dst;
op_info->u.asym_op_info = asym_op_info;
return 0;
err:
g_free(asym_op_info);
g_free(src);
g_free(dst);
return -EFAULT;
}
static int
virtio_crypto_handle_request(VirtIOCryptoReq *request)
{
VirtIOCrypto *vcrypto = request->vcrypto;
VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto);
VirtQueueElement *elem = &request->elem;
int queue_index = virtio_crypto_vq2q(virtio_get_queue_index(request->vq));
struct virtio_crypto_op_data_req req;
int ret;
g_autofree struct iovec *in_iov_copy = NULL;
g_autofree struct iovec *out_iov_copy = NULL;
struct iovec *in_iov;
struct iovec *out_iov;
unsigned in_num;
unsigned out_num;
uint32_t opcode;
CryptoDevBackendOpInfo *op_info = &request->op_info;
if (elem->out_num < 1 || elem->in_num < 1) {
virtio_error(vdev, "virtio-crypto dataq missing headers");
return -1;
}
out_num = elem->out_num;
out_iov_copy = g_memdup2(elem->out_sg, sizeof(out_iov[0]) * out_num);
out_iov = out_iov_copy;
in_num = elem->in_num;
in_iov_copy = g_memdup2(elem->in_sg, sizeof(in_iov[0]) * in_num);
in_iov = in_iov_copy;
if (unlikely(iov_to_buf(out_iov, out_num, 0, &req, sizeof(req))
!= sizeof(req))) {
virtio_error(vdev, "virtio-crypto request outhdr too short");
return -1;
}
iov_discard_front(&out_iov, &out_num, sizeof(req));
if (in_iov[in_num - 1].iov_len <
sizeof(struct virtio_crypto_inhdr)) {
virtio_error(vdev, "virtio-crypto request inhdr too short");
return -1;
}
/* We always touch the last byte, so just see how big in_iov is. */
request->in_len = iov_size(in_iov, in_num);
request->in = (void *)in_iov[in_num - 1].iov_base
+ in_iov[in_num - 1].iov_len
- sizeof(struct virtio_crypto_inhdr);
iov_discard_back(in_iov, &in_num, sizeof(struct virtio_crypto_inhdr));
/*
* The length of operation result, including dest_data
* and digest_result if exists.
*/
request->in_num = in_num;
request->in_iov = in_iov;
/* now, we free the in_iov_copy inside virtio_crypto_free_request */
in_iov_copy = NULL;
opcode = ldl_le_p(&req.header.opcode);
op_info->session_id = ldq_le_p(&req.header.session_id);
op_info->op_code = opcode;
op_info->queue_index = queue_index;
op_info->cb = virtio_crypto_req_complete;
op_info->opaque = request;
switch (opcode) {
case VIRTIO_CRYPTO_CIPHER_ENCRYPT:
case VIRTIO_CRYPTO_CIPHER_DECRYPT:
op_info->algtype = request->flags = QCRYPTODEV_BACKEND_ALGO_TYPE_SYM;
ret = virtio_crypto_handle_sym_req(vcrypto,
&req.u.sym_req, op_info,
out_iov, out_num);
goto check_result;
case VIRTIO_CRYPTO_AKCIPHER_ENCRYPT:
case VIRTIO_CRYPTO_AKCIPHER_DECRYPT:
case VIRTIO_CRYPTO_AKCIPHER_SIGN:
case VIRTIO_CRYPTO_AKCIPHER_VERIFY:
op_info->algtype = request->flags = QCRYPTODEV_BACKEND_ALGO_TYPE_ASYM;
ret = virtio_crypto_handle_asym_req(vcrypto,
&req.u.akcipher_req, op_info,
out_iov, out_num);
check_result:
/* Serious errors, need to reset virtio crypto device */
if (ret == -EFAULT) {
return -1;
} else if (ret == -VIRTIO_CRYPTO_NOTSUPP) {
virtio_crypto_req_complete(request, -VIRTIO_CRYPTO_NOTSUPP);
} else {
ret = cryptodev_backend_crypto_operation(vcrypto->cryptodev,
op_info);
if (ret < 0) {
virtio_crypto_req_complete(request, ret);
}
}
break;
case VIRTIO_CRYPTO_HASH:
case VIRTIO_CRYPTO_MAC:
case VIRTIO_CRYPTO_AEAD_ENCRYPT:
case VIRTIO_CRYPTO_AEAD_DECRYPT:
default:
error_report("virtio-crypto unsupported dataq opcode: %u",
opcode);
virtio_crypto_req_complete(request, -VIRTIO_CRYPTO_NOTSUPP);
}
return 0;
}
static void virtio_crypto_handle_dataq(VirtIODevice *vdev, VirtQueue *vq)
{
VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
VirtIOCryptoReq *req;
while ((req = virtio_crypto_get_request(vcrypto, vq))) {
if (virtio_crypto_handle_request(req) < 0) {
virtqueue_detach_element(req->vq, &req->elem, 0);
virtio_crypto_free_request(req);
break;
}
}
}
static void virtio_crypto_dataq_bh(void *opaque)
{
VirtIOCryptoQueue *q = opaque;
VirtIOCrypto *vcrypto = q->vcrypto;
VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto);
/* This happens when device was stopped but BH wasn't. */
if (!vdev->vm_running) {
return;
}
/* Just in case the driver is not ready on more */
if (unlikely(!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK))) {
return;
}
for (;;) {
virtio_crypto_handle_dataq(vdev, q->dataq);
virtio_queue_set_notification(q->dataq, 1);
/* Are we done or did the guest add more buffers? */
if (virtio_queue_empty(q->dataq)) {
break;
}
virtio_queue_set_notification(q->dataq, 0);
}
}
static void
virtio_crypto_handle_dataq_bh(VirtIODevice *vdev, VirtQueue *vq)
{
VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
VirtIOCryptoQueue *q =
&vcrypto->vqs[virtio_crypto_vq2q(virtio_get_queue_index(vq))];
/* This happens when device was stopped but VCPU wasn't. */
if (!vdev->vm_running) {
return;
}
virtio_queue_set_notification(vq, 0);
qemu_bh_schedule(q->dataq_bh);
}
static uint64_t virtio_crypto_get_features(VirtIODevice *vdev,
uint64_t features,
Error **errp)
{
return features;
}
static void virtio_crypto_reset(VirtIODevice *vdev)
{
VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
/* multiqueue is disabled by default */
vcrypto->curr_queues = 1;
if (!cryptodev_backend_is_ready(vcrypto->cryptodev)) {
vcrypto->status &= ~VIRTIO_CRYPTO_S_HW_READY;
} else {
vcrypto->status |= VIRTIO_CRYPTO_S_HW_READY;
}
}
static uint32_t virtio_crypto_init_services(uint32_t qservices)
{
uint32_t vservices = 0;
if (qservices & (1 << QCRYPTODEV_BACKEND_SERVICE_TYPE_CIPHER)) {
vservices |= (1 << VIRTIO_CRYPTO_SERVICE_CIPHER);
}
if (qservices & (1 << QCRYPTODEV_BACKEND_SERVICE_TYPE_HASH)) {
vservices |= (1 << VIRTIO_CRYPTO_SERVICE_HASH);
}
if (qservices & (1 << QCRYPTODEV_BACKEND_SERVICE_TYPE_MAC)) {
vservices |= (1 << VIRTIO_CRYPTO_SERVICE_MAC);
}
if (qservices & (1 << QCRYPTODEV_BACKEND_SERVICE_TYPE_AEAD)) {
vservices |= (1 << VIRTIO_CRYPTO_SERVICE_AEAD);
}
if (qservices & (1 << QCRYPTODEV_BACKEND_SERVICE_TYPE_AKCIPHER)) {
vservices |= (1 << VIRTIO_CRYPTO_SERVICE_AKCIPHER);
}
return vservices;
}
static void virtio_crypto_init_config(VirtIODevice *vdev)
{
VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
vcrypto->conf.crypto_services = virtio_crypto_init_services(
vcrypto->conf.cryptodev->conf.crypto_services);
vcrypto->conf.cipher_algo_l =
vcrypto->conf.cryptodev->conf.cipher_algo_l;
vcrypto->conf.cipher_algo_h =
vcrypto->conf.cryptodev->conf.cipher_algo_h;
vcrypto->conf.hash_algo = vcrypto->conf.cryptodev->conf.hash_algo;
vcrypto->conf.mac_algo_l = vcrypto->conf.cryptodev->conf.mac_algo_l;
vcrypto->conf.mac_algo_h = vcrypto->conf.cryptodev->conf.mac_algo_h;
vcrypto->conf.aead_algo = vcrypto->conf.cryptodev->conf.aead_algo;
vcrypto->conf.akcipher_algo = vcrypto->conf.cryptodev->conf.akcipher_algo;
vcrypto->conf.max_cipher_key_len =
vcrypto->conf.cryptodev->conf.max_cipher_key_len;
vcrypto->conf.max_auth_key_len =
vcrypto->conf.cryptodev->conf.max_auth_key_len;
vcrypto->conf.max_size = vcrypto->conf.cryptodev->conf.max_size;
}
static void virtio_crypto_device_realize(DeviceState *dev, Error **errp)
{
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(dev);
int i;
vcrypto->cryptodev = vcrypto->conf.cryptodev;
if (vcrypto->cryptodev == NULL) {
error_setg(errp, "'cryptodev' parameter expects a valid object");
return;
} else if (cryptodev_backend_is_used(vcrypto->cryptodev)) {
error_setg(errp, "can't use already used cryptodev backend: %s",
object_get_canonical_path_component(OBJECT(vcrypto->conf.cryptodev)));
return;
}
vcrypto->max_queues = MAX(vcrypto->cryptodev->conf.peers.queues, 1);
if (vcrypto->max_queues + 1 > VIRTIO_QUEUE_MAX) {
error_setg(errp, "Invalid number of queues (= %" PRIu32 "), "
"must be a positive integer less than %d.",
vcrypto->max_queues, VIRTIO_QUEUE_MAX);
return;
}
virtio_init(vdev, VIRTIO_ID_CRYPTO, vcrypto->config_size);
vcrypto->curr_queues = 1;
vcrypto->vqs = g_new0(VirtIOCryptoQueue, vcrypto->max_queues);
for (i = 0; i < vcrypto->max_queues; i++) {
vcrypto->vqs[i].dataq =
virtio_add_queue(vdev, 1024, virtio_crypto_handle_dataq_bh);
vcrypto->vqs[i].dataq_bh =
virtio_bh_new_guarded(dev, virtio_crypto_dataq_bh,
&vcrypto->vqs[i]);
vcrypto->vqs[i].vcrypto = vcrypto;
}
vcrypto->ctrl_vq = virtio_add_queue(vdev, 1024, virtio_crypto_handle_ctrl);
if (!cryptodev_backend_is_ready(vcrypto->cryptodev)) {
vcrypto->status &= ~VIRTIO_CRYPTO_S_HW_READY;
} else {
vcrypto->status |= VIRTIO_CRYPTO_S_HW_READY;
}
virtio_crypto_init_config(vdev);
cryptodev_backend_set_used(vcrypto->cryptodev, true);
}
static void virtio_crypto_device_unrealize(DeviceState *dev)
{
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(dev);
VirtIOCryptoQueue *q;
int i, max_queues;
max_queues = vcrypto->multiqueue ? vcrypto->max_queues : 1;
for (i = 0; i < max_queues; i++) {
virtio_delete_queue(vcrypto->vqs[i].dataq);
q = &vcrypto->vqs[i];
qemu_bh_delete(q->dataq_bh);
}
g_free(vcrypto->vqs);
virtio_delete_queue(vcrypto->ctrl_vq);
virtio_cleanup(vdev);
cryptodev_backend_set_used(vcrypto->cryptodev, false);
}
static const VMStateDescription vmstate_virtio_crypto = {
.name = "virtio-crypto",
.unmigratable = 1,
.minimum_version_id = VIRTIO_CRYPTO_VM_VERSION,
.version_id = VIRTIO_CRYPTO_VM_VERSION,
.fields = (const VMStateField[]) {
VMSTATE_VIRTIO_DEVICE,
VMSTATE_END_OF_LIST()
},
};
static const Property virtio_crypto_properties[] = {
DEFINE_PROP_LINK("cryptodev", VirtIOCrypto, conf.cryptodev,
TYPE_CRYPTODEV_BACKEND, CryptoDevBackend *),
};
static void virtio_crypto_get_config(VirtIODevice *vdev, uint8_t *config)
{
VirtIOCrypto *c = VIRTIO_CRYPTO(vdev);
struct virtio_crypto_config crypto_cfg = {};
/*
* Virtio-crypto device conforms to VIRTIO 1.0 which is always LE,
* so we can use LE accessors directly.
*/
stl_le_p(&crypto_cfg.status, c->status);
stl_le_p(&crypto_cfg.max_dataqueues, c->max_queues);
stl_le_p(&crypto_cfg.crypto_services, c->conf.crypto_services);
stl_le_p(&crypto_cfg.cipher_algo_l, c->conf.cipher_algo_l);
stl_le_p(&crypto_cfg.cipher_algo_h, c->conf.cipher_algo_h);
stl_le_p(&crypto_cfg.hash_algo, c->conf.hash_algo);
stl_le_p(&crypto_cfg.mac_algo_l, c->conf.mac_algo_l);
stl_le_p(&crypto_cfg.mac_algo_h, c->conf.mac_algo_h);
stl_le_p(&crypto_cfg.aead_algo, c->conf.aead_algo);
stl_le_p(&crypto_cfg.max_cipher_key_len, c->conf.max_cipher_key_len);
stl_le_p(&crypto_cfg.max_auth_key_len, c->conf.max_auth_key_len);
stq_le_p(&crypto_cfg.max_size, c->conf.max_size);
stl_le_p(&crypto_cfg.akcipher_algo, c->conf.akcipher_algo);
memcpy(config, &crypto_cfg, c->config_size);
}
static bool virtio_crypto_started(VirtIOCrypto *c, uint8_t status)
{
VirtIODevice *vdev = VIRTIO_DEVICE(c);
return (status & VIRTIO_CONFIG_S_DRIVER_OK) &&
(c->status & VIRTIO_CRYPTO_S_HW_READY) && vdev->vm_running;
}
static void virtio_crypto_vhost_status(VirtIOCrypto *c, uint8_t status)
{
VirtIODevice *vdev = VIRTIO_DEVICE(c);
int queues = c->multiqueue ? c->max_queues : 1;
CryptoDevBackend *b = c->cryptodev;
CryptoDevBackendClient *cc = b->conf.peers.ccs[0];
if (!cryptodev_get_vhost(cc, b, 0)) {
return;
}
if ((virtio_crypto_started(c, status)) == !!c->vhost_started) {
return;
}
if (!c->vhost_started) {
int r;
c->vhost_started = 1;
r = cryptodev_vhost_start(vdev, queues);
if (r < 0) {
error_report("unable to start vhost crypto: %d: "
"falling back on userspace virtio", -r);
c->vhost_started = 0;
}
} else {
cryptodev_vhost_stop(vdev, queues);
c->vhost_started = 0;
}
}
static int virtio_crypto_set_status(VirtIODevice *vdev, uint8_t status)
{
VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
virtio_crypto_vhost_status(vcrypto, status);
return 0;
}
static void virtio_crypto_guest_notifier_mask(VirtIODevice *vdev, int idx,
bool mask)
{
VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
int queue = virtio_crypto_vq2q(idx);
assert(vcrypto->vhost_started);
/*
* Add the check for configure interrupt, Use VIRTIO_CONFIG_IRQ_IDX -1
* as the macro of configure interrupt's IDX, If this driver does not
* support, the function will return
*/
if (idx == VIRTIO_CONFIG_IRQ_IDX) {
return;
}
cryptodev_vhost_virtqueue_mask(vdev, queue, idx, mask);
}
static bool virtio_crypto_guest_notifier_pending(VirtIODevice *vdev, int idx)
{
VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
int queue = virtio_crypto_vq2q(idx);
assert(vcrypto->vhost_started);
/*
* Add the check for configure interrupt, Use VIRTIO_CONFIG_IRQ_IDX -1
* as the macro of configure interrupt's IDX, If this driver does not
* support, the function will return
*/
if (idx == VIRTIO_CONFIG_IRQ_IDX) {
return false;
}
return cryptodev_vhost_virtqueue_pending(vdev, queue, idx);
}
static struct vhost_dev *virtio_crypto_get_vhost(VirtIODevice *vdev)
{
VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
CryptoDevBackend *b;
CryptoDevBackendClient *cc;
CryptoDevBackendVhost *vhost_crypto;
b = vcrypto->cryptodev;
if (!b) {
return NULL;
}
cc = b->conf.peers.ccs[0];
vhost_crypto = cryptodev_get_vhost(cc, b, 0);
if (!vhost_crypto) {
return NULL;
}
return &vhost_crypto->dev;
}
static void virtio_crypto_class_init(ObjectClass *klass, const void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
device_class_set_props(dc, virtio_crypto_properties);
dc->vmsd = &vmstate_virtio_crypto;
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
vdc->realize = virtio_crypto_device_realize;
vdc->unrealize = virtio_crypto_device_unrealize;
vdc->get_config = virtio_crypto_get_config;
vdc->get_features = virtio_crypto_get_features;
vdc->reset = virtio_crypto_reset;
vdc->set_status = virtio_crypto_set_status;
vdc->guest_notifier_mask = virtio_crypto_guest_notifier_mask;
vdc->guest_notifier_pending = virtio_crypto_guest_notifier_pending;
vdc->get_vhost = virtio_crypto_get_vhost;
}
static void virtio_crypto_instance_init(Object *obj)
{
VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(obj);
/*
* The default config_size is sizeof(struct virtio_crypto_config).
* Can be overridden with virtio_crypto_set_config_size.
*/
vcrypto->config_size = sizeof(struct virtio_crypto_config);
}
static const TypeInfo virtio_crypto_info = {
.name = TYPE_VIRTIO_CRYPTO,
.parent = TYPE_VIRTIO_DEVICE,
.instance_size = sizeof(VirtIOCrypto),
.instance_init = virtio_crypto_instance_init,
.class_init = virtio_crypto_class_init,
};
static void virtio_register_types(void)
{
type_register_static(&virtio_crypto_info);
}
type_init(virtio_register_types)
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