diff options
Diffstat (limited to 'backends/cryptodev-vhost.c')
| -rw-r--r-- | backends/cryptodev-vhost.c | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/backends/cryptodev-vhost.c b/backends/cryptodev-vhost.c index 27e1c4ad25..8337c9a495 100644 --- a/backends/cryptodev-vhost.c +++ b/backends/cryptodev-vhost.c @@ -23,9 +23,16 @@ */ #include "qemu/osdep.h" +#include "hw/virtio/virtio-bus.h" #include "sysemu/cryptodev-vhost.h" #ifdef CONFIG_VHOST_CRYPTO +#include "qapi/error.h" +#include "qapi/qmp/qerror.h" +#include "qemu/error-report.h" +#include "hw/virtio/virtio-crypto.h" +#include "sysemu/cryptodev-vhost-user.h" + uint64_t cryptodev_vhost_get_max_queues( CryptoDevBackendVhost *crypto) @@ -70,6 +77,228 @@ fail: return NULL; } +static int +cryptodev_vhost_start_one(CryptoDevBackendVhost *crypto, + VirtIODevice *dev) +{ + int r; + + crypto->dev.nvqs = 1; + crypto->dev.vqs = crypto->vqs; + + r = vhost_dev_enable_notifiers(&crypto->dev, dev); + if (r < 0) { + goto fail_notifiers; + } + + r = vhost_dev_start(&crypto->dev, dev); + if (r < 0) { + goto fail_start; + } + + return 0; + +fail_start: + vhost_dev_disable_notifiers(&crypto->dev, dev); +fail_notifiers: + return r; +} + +static void +cryptodev_vhost_stop_one(CryptoDevBackendVhost *crypto, + VirtIODevice *dev) +{ + vhost_dev_stop(&crypto->dev, dev); + vhost_dev_disable_notifiers(&crypto->dev, dev); +} + +CryptoDevBackendVhost * +cryptodev_get_vhost(CryptoDevBackendClient *cc, + CryptoDevBackend *b, + uint16_t queue) +{ + CryptoDevBackendVhost *vhost_crypto = NULL; + + if (!cc) { + return NULL; + } + + switch (cc->type) { +#if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX) + case CRYPTODEV_BACKEND_TYPE_VHOST_USER: + vhost_crypto = cryptodev_vhost_user_get_vhost(cc, b, queue); + break; +#endif + default: + break; + } + + return vhost_crypto; +} + +static void +cryptodev_vhost_set_vq_index(CryptoDevBackendVhost *crypto, + int vq_index) +{ + crypto->dev.vq_index = vq_index; +} + +static int +vhost_set_vring_enable(CryptoDevBackendClient *cc, + CryptoDevBackend *b, + uint16_t queue, int enable) +{ + CryptoDevBackendVhost *crypto = + cryptodev_get_vhost(cc, b, queue); + const VhostOps *vhost_ops; + + cc->vring_enable = enable; + + if (!crypto) { + return 0; + } + + vhost_ops = crypto->dev.vhost_ops; + if (vhost_ops->vhost_set_vring_enable) { + return vhost_ops->vhost_set_vring_enable(&crypto->dev, enable); + } + + return 0; +} + +int cryptodev_vhost_start(VirtIODevice *dev, int total_queues) +{ + VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(dev); + BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(dev))); + VirtioBusState *vbus = VIRTIO_BUS(qbus); + VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(vbus); + int r, e; + int i; + CryptoDevBackend *b = vcrypto->cryptodev; + CryptoDevBackendVhost *vhost_crypto; + CryptoDevBackendClient *cc; + + if (!k->set_guest_notifiers) { + error_report("binding does not support guest notifiers"); + return -ENOSYS; + } + + for (i = 0; i < total_queues; i++) { + cc = b->conf.peers.ccs[i]; + + vhost_crypto = cryptodev_get_vhost(cc, b, i); + cryptodev_vhost_set_vq_index(vhost_crypto, i); + + /* Suppress the masking guest notifiers on vhost user + * because vhost user doesn't interrupt masking/unmasking + * properly. + */ + if (cc->type == CRYPTODEV_BACKEND_TYPE_VHOST_USER) { + dev->use_guest_notifier_mask = false; + } + } + + r = k->set_guest_notifiers(qbus->parent, total_queues, true); + if (r < 0) { + error_report("error binding guest notifier: %d", -r); + goto err; + } + + for (i = 0; i < total_queues; i++) { + cc = b->conf.peers.ccs[i]; + + vhost_crypto = cryptodev_get_vhost(cc, b, i); + r = cryptodev_vhost_start_one(vhost_crypto, dev); + + if (r < 0) { + goto err_start; + } + + if (cc->vring_enable) { + /* restore vring enable state */ + r = vhost_set_vring_enable(cc, b, i, cc->vring_enable); + + if (r < 0) { + goto err_start; + } + } + } + + return 0; + +err_start: + while (--i >= 0) { + cc = b->conf.peers.ccs[i]; + vhost_crypto = cryptodev_get_vhost(cc, b, i); + cryptodev_vhost_stop_one(vhost_crypto, dev); + } + e = k->set_guest_notifiers(qbus->parent, total_queues, false); + if (e < 0) { + error_report("vhost guest notifier cleanup failed: %d", e); + } +err: + return r; +} + +void cryptodev_vhost_stop(VirtIODevice *dev, int total_queues) +{ + BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(dev))); + VirtioBusState *vbus = VIRTIO_BUS(qbus); + VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(vbus); + VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(dev); + CryptoDevBackend *b = vcrypto->cryptodev; + CryptoDevBackendVhost *vhost_crypto; + CryptoDevBackendClient *cc; + size_t i; + int r; + + for (i = 0; i < total_queues; i++) { + cc = b->conf.peers.ccs[i]; + + vhost_crypto = cryptodev_get_vhost(cc, b, i); + cryptodev_vhost_stop_one(vhost_crypto, dev); + } + + r = k->set_guest_notifiers(qbus->parent, total_queues, false); + if (r < 0) { + error_report("vhost guest notifier cleanup failed: %d", r); + } + assert(r >= 0); +} + +void cryptodev_vhost_virtqueue_mask(VirtIODevice *dev, + int queue, + int idx, bool mask) +{ + VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(dev); + CryptoDevBackend *b = vcrypto->cryptodev; + CryptoDevBackendVhost *vhost_crypto; + CryptoDevBackendClient *cc; + + assert(queue < MAX_CRYPTO_QUEUE_NUM); + + cc = b->conf.peers.ccs[queue]; + vhost_crypto = cryptodev_get_vhost(cc, b, queue); + + vhost_virtqueue_mask(&vhost_crypto->dev, dev, idx, mask); +} + +bool cryptodev_vhost_virtqueue_pending(VirtIODevice *dev, + int queue, int idx) +{ + VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(dev); + CryptoDevBackend *b = vcrypto->cryptodev; + CryptoDevBackendVhost *vhost_crypto; + CryptoDevBackendClient *cc; + + assert(queue < MAX_CRYPTO_QUEUE_NUM); + + cc = b->conf.peers.ccs[queue]; + vhost_crypto = cryptodev_get_vhost(cc, b, queue); + + return vhost_virtqueue_pending(&vhost_crypto->dev, idx); +} + #else uint64_t cryptodev_vhost_get_max_queues(CryptoDevBackendVhost *crypto) @@ -86,4 +315,33 @@ cryptodev_vhost_init(CryptoDevBackendVhostOptions *options) { return NULL; } + +CryptoDevBackendVhost * +cryptodev_get_vhost(CryptoDevBackendClient *cc, + CryptoDevBackend *b, + uint16_t queue) +{ + return NULL; +} + +int cryptodev_vhost_start(VirtIODevice *dev, int total_queues) +{ + return -1; +} + +void cryptodev_vhost_stop(VirtIODevice *dev, int total_queues) +{ +} + +void cryptodev_vhost_virtqueue_mask(VirtIODevice *dev, + int queue, + int idx, bool mask) +{ +} + +bool cryptodev_vhost_virtqueue_pending(VirtIODevice *dev, + int queue, int idx) +{ + return false; +} #endif |