From 20cb2ffd5ff3fdbf47d7a69d1bb649000aca66b6 Mon Sep 17 00:00:00 2001 From: Gonglei Date: Fri, 28 Oct 2016 16:33:30 +0800 Subject: virtio-crypto: using bh to handle dataq's requests Make crypto operations are executed asynchronously, so that other QEMU threads and monitor couldn't be blocked at the virtqueue handling context. Signed-off-by: Gonglei Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/virtio/virtio-crypto.c | 55 +++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 53 insertions(+), 2 deletions(-) (limited to 'hw/virtio/virtio-crypto.c') diff --git a/hw/virtio/virtio-crypto.c b/hw/virtio/virtio-crypto.c index c160aa4f15..170114f52b 100644 --- a/hw/virtio/virtio-crypto.c +++ b/hw/virtio/virtio-crypto.c @@ -676,6 +676,41 @@ static void virtio_crypto_handle_dataq(VirtIODevice *vdev, VirtQueue *vq) } } +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; + } + + virtio_crypto_handle_dataq(vdev, q->dataq); + virtio_queue_set_notification(q->dataq, 1); +} + +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) @@ -738,9 +773,13 @@ static void virtio_crypto_device_realize(DeviceState *dev, Error **errp) virtio_init(vdev, "virtio-crypto", VIRTIO_ID_CRYPTO, vcrypto->config_size); vcrypto->curr_queues = 1; - + vcrypto->vqs = g_malloc0(sizeof(VirtIOCryptoQueue) * vcrypto->max_queues); for (i = 0; i < vcrypto->max_queues; i++) { - virtio_add_queue(vdev, 1024, virtio_crypto_handle_dataq); + vcrypto->vqs[i].dataq = + virtio_add_queue(vdev, 1024, virtio_crypto_handle_dataq_bh); + vcrypto->vqs[i].dataq_bh = + qemu_bh_new(virtio_crypto_dataq_bh, &vcrypto->vqs[i]); + vcrypto->vqs[i].vcrypto = vcrypto; } vcrypto->ctrl_vq = virtio_add_queue(vdev, 64, virtio_crypto_handle_ctrl); @@ -756,6 +795,18 @@ static void virtio_crypto_device_realize(DeviceState *dev, Error **errp) static void virtio_crypto_device_unrealize(DeviceState *dev, Error **errp) { 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_del_queue(vdev, i); + q = &vcrypto->vqs[i]; + qemu_bh_delete(q->dataq_bh); + } + + g_free(vcrypto->vqs); virtio_cleanup(vdev); } -- cgit v1.2.3