cryptodev: add vhost-user as a new cryptodev backend

Usage:
 -chardev socket,id=charcrypto0,path=/path/to/your/socket
 -object cryptodev-vhost-user,id=cryptodev0,chardev=charcrypto0
 -device virtio-crypto-pci,id=crypto0,cryptodev=cryptodev0

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Longpeng(Mike) <longpeng2@huawei.com>
Signed-off-by: Jay Zhou <jianjay.zhou@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 89 insertions, 0 deletions

diff --git a/backends/cryptodev-vhost.c b/backends/cryptodev-vhost.c
new file mode 100644
index 0000000000..27e1c4ad25
--- /dev/null
+++ b/backends/cryptodev-vhost.c
@@ -0,0 +1,89 @@
+/*
+ * QEMU Cryptodev backend for QEMU cipher APIs
+ *
+ * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
+ *
+ * Authors:
+ *    Gonglei <arei.gonglei@huawei.com>
+ *    Jay Zhou <jianjay.zhou@huawei.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "sysemu/cryptodev-vhost.h"
+
+#ifdef CONFIG_VHOST_CRYPTO
+uint64_t
+cryptodev_vhost_get_max_queues(
+                        CryptoDevBackendVhost *crypto)
+{
+    return crypto->dev.max_queues;
+}
+
+void cryptodev_vhost_cleanup(CryptoDevBackendVhost *crypto)
+{
+    vhost_dev_cleanup(&crypto->dev);
+    g_free(crypto);
+}
+
+struct CryptoDevBackendVhost *
+cryptodev_vhost_init(
+             CryptoDevBackendVhostOptions *options)
+{
+    int r;
+    CryptoDevBackendVhost *crypto;
+
+    crypto = g_new(CryptoDevBackendVhost, 1);
+    crypto->dev.max_queues = 1;
+    crypto->dev.nvqs = 1;
+    crypto->dev.vqs = crypto->vqs;
+
+    crypto->cc = options->cc;
+
+    crypto->dev.protocol_features = 0;
+    crypto->backend = -1;
+
+    /* vhost-user needs vq_index to initiate a specific queue pair */
+    crypto->dev.vq_index = crypto->cc->queue_index * crypto->dev.nvqs;
+
+    r = vhost_dev_init(&crypto->dev, options->opaque, options->backend_type, 0);
+    if (r < 0) {
+        goto fail;
+    }
+
+    return crypto;
+fail:
+    g_free(crypto);
+    return NULL;
+}
+
+#else
+uint64_t
+cryptodev_vhost_get_max_queues(CryptoDevBackendVhost *crypto)
+{
+    return 0;
+}
+
+void cryptodev_vhost_cleanup(CryptoDevBackendVhost *crypto)
+{
+}
+
+struct CryptoDevBackendVhost *
+cryptodev_vhost_init(CryptoDevBackendVhostOptions *options)
+{
+    return NULL;
+}
+#endif