23d471091d
- kvm-vhost-Track-descriptor-chain-in-private-at-SVQ.patch [bz#1939363] - kvm-vhost-Fix-device-s-used-descriptor-dequeue.patch [bz#1939363] - kvm-hw-virtio-Replace-g_memdup-by-g_memdup2.patch [bz#1939363] - kvm-vhost-Fix-element-in-vhost_svq_add-failure.patch [bz#1939363] - kvm-meson-create-have_vhost_-variables.patch [bz#1939363] - kvm-meson-use-have_vhost_-variables-to-pick-sources.patch [bz#1939363] - kvm-vhost-move-descriptor-translation-to-vhost_svq_vring.patch [bz#1939363] - kvm-virtio-net-Expose-MAC_TABLE_ENTRIES.patch [bz#1939363] - kvm-virtio-net-Expose-ctrl-virtqueue-logic.patch [bz#1939363] - kvm-vdpa-Avoid-compiler-to-squash-reads-to-used-idx.patch [bz#1939363] - kvm-vhost-Reorder-vhost_svq_kick.patch [bz#1939363] - kvm-vhost-Move-vhost_svq_kick-call-to-vhost_svq_add.patch [bz#1939363] - kvm-vhost-Check-for-queue-full-at-vhost_svq_add.patch [bz#1939363] - kvm-vhost-Decouple-vhost_svq_add-from-VirtQueueElement.patch [bz#1939363] - kvm-vhost-Add-SVQDescState.patch [bz#1939363] - kvm-vhost-Track-number-of-descs-in-SVQDescState.patch [bz#1939363] - kvm-vhost-add-vhost_svq_push_elem.patch [bz#1939363] - kvm-vhost-Expose-vhost_svq_add.patch [bz#1939363] - kvm-vhost-add-vhost_svq_poll.patch [bz#1939363] - kvm-vhost-Add-svq-avail_handler-callback.patch [bz#1939363] - kvm-vdpa-Export-vhost_vdpa_dma_map-and-unmap-calls.patch [bz#1939363] - kvm-vhost-net-vdpa-add-stubs-for-when-no-virtio-net-devi.patch [bz#1939363] - kvm-vdpa-manual-forward-CVQ-buffers.patch [bz#1939363] - kvm-vdpa-Buffer-CVQ-support-on-shadow-virtqueue.patch [bz#1939363] - kvm-vdpa-Extract-get-features-part-from-vhost_vdpa_get_m.patch [bz#1939363] - kvm-vdpa-Add-device-migration-blocker.patch [bz#1939363] - kvm-vdpa-Add-x-svq-to-NetdevVhostVDPAOptions.patch [bz#1939363] - kvm-redhat-Update-linux-headers-linux-kvm.h-to-v5.18-rc6.patch [bz#2111994] - kvm-target-s390x-kvm-Honor-storage-keys-during-emulation.patch [bz#2111994] - kvm-kvm-don-t-use-perror-without-useful-errno.patch [bz#2095608] - kvm-multifd-Copy-pages-before-compressing-them-with-zlib.patch [bz#2099934] - kvm-Revert-migration-Simplify-unqueue_page.patch [bz#2099934] - Resolves: bz#1939363 (vDPA control virtqueue support in Qemu) - Resolves: bz#2111994 (RHEL9: skey test in kvm_unit_test got failed) - Resolves: bz#2095608 (Please correct the error message when try to start qemu with "-M kernel-irqchip=split") - Resolves: bz#2099934 (Guest reboot on destination host after postcopy migration completed)
165 lines
6.0 KiB
Diff
165 lines
6.0 KiB
Diff
From 433106c286a1961737300ebaece6f10b2747e7d8 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= <eperezma@redhat.com>
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Date: Thu, 21 Jul 2022 15:38:55 +0200
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Subject: [PATCH 20/32] vhost: Add svq avail_handler callback
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Eugenio Pérez <eperezma@redhat.com>
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RH-MergeRequest: 108: Net Control Virtqueue shadow Support
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RH-Commit: [20/27] d228eb89d204f8be623bc870503bbf0078dfc9ae (eperezmartin/qemu-kvm)
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RH-Bugzilla: 1939363
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RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
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RH-Acked-by: Cindy Lu <lulu@redhat.com>
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RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
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Bugzilla: https://bugzilla.redhat.com/1939363
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Upstream Status: git://git.qemu.org/qemu.git
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commit e966c0b781aebabd2c0f5eef91678f08ce1d068c
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Author: Eugenio Pérez <eperezma@redhat.com>
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Date: Wed Jul 20 08:59:39 2022 +0200
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vhost: Add svq avail_handler callback
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This allows external handlers to be aware of new buffers that the guest
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places in the virtqueue.
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When this callback is defined the ownership of the guest's virtqueue
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element is transferred to the callback. This means that if the user
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wants to forward the descriptor it needs to manually inject it. The
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callback is also free to process the command by itself and use the
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element with svq_push.
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Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
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Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
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Signed-off-by: Jason Wang <jasowang@redhat.com>
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Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
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---
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hw/virtio/vhost-shadow-virtqueue.c | 14 ++++++++++++--
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hw/virtio/vhost-shadow-virtqueue.h | 31 +++++++++++++++++++++++++++++-
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hw/virtio/vhost-vdpa.c | 3 ++-
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3 files changed, 44 insertions(+), 4 deletions(-)
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diff --git a/hw/virtio/vhost-shadow-virtqueue.c b/hw/virtio/vhost-shadow-virtqueue.c
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index 95d0d7a7ee..e53aac45f6 100644
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--- a/hw/virtio/vhost-shadow-virtqueue.c
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+++ b/hw/virtio/vhost-shadow-virtqueue.c
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@@ -306,7 +306,11 @@ static void vhost_handle_guest_kick(VhostShadowVirtqueue *svq)
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break;
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}
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- r = vhost_svq_add_element(svq, elem);
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+ if (svq->ops) {
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+ r = svq->ops->avail_handler(svq, elem, svq->ops_opaque);
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+ } else {
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+ r = vhost_svq_add_element(svq, elem);
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+ }
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if (unlikely(r != 0)) {
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if (r == -ENOSPC) {
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/*
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@@ -685,12 +689,16 @@ void vhost_svq_stop(VhostShadowVirtqueue *svq)
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* shadow methods and file descriptors.
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*
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* @iova_tree: Tree to perform descriptors translations
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+ * @ops: SVQ owner callbacks
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+ * @ops_opaque: ops opaque pointer
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*
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* Returns the new virtqueue or NULL.
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*
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* In case of error, reason is reported through error_report.
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*/
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-VhostShadowVirtqueue *vhost_svq_new(VhostIOVATree *iova_tree)
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+VhostShadowVirtqueue *vhost_svq_new(VhostIOVATree *iova_tree,
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+ const VhostShadowVirtqueueOps *ops,
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+ void *ops_opaque)
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{
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g_autofree VhostShadowVirtqueue *svq = g_new0(VhostShadowVirtqueue, 1);
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int r;
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@@ -712,6 +720,8 @@ VhostShadowVirtqueue *vhost_svq_new(VhostIOVATree *iova_tree)
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event_notifier_init_fd(&svq->svq_kick, VHOST_FILE_UNBIND);
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event_notifier_set_handler(&svq->hdev_call, vhost_svq_handle_call);
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svq->iova_tree = iova_tree;
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+ svq->ops = ops;
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+ svq->ops_opaque = ops_opaque;
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return g_steal_pointer(&svq);
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err_init_hdev_call:
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diff --git a/hw/virtio/vhost-shadow-virtqueue.h b/hw/virtio/vhost-shadow-virtqueue.h
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index cf442f7dea..d04c34a589 100644
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--- a/hw/virtio/vhost-shadow-virtqueue.h
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+++ b/hw/virtio/vhost-shadow-virtqueue.h
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@@ -25,6 +25,27 @@ typedef struct SVQDescState {
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unsigned int ndescs;
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} SVQDescState;
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+typedef struct VhostShadowVirtqueue VhostShadowVirtqueue;
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+
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+/**
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+ * Callback to handle an avail buffer.
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+ *
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+ * @svq: Shadow virtqueue
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+ * @elem: Element placed in the queue by the guest
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+ * @vq_callback_opaque: Opaque
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+ *
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+ * Returns 0 if the vq is running as expected.
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+ *
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+ * Note that ownership of elem is transferred to the callback.
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+ */
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+typedef int (*VirtQueueAvailCallback)(VhostShadowVirtqueue *svq,
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+ VirtQueueElement *elem,
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+ void *vq_callback_opaque);
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+
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+typedef struct VhostShadowVirtqueueOps {
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+ VirtQueueAvailCallback avail_handler;
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+} VhostShadowVirtqueueOps;
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+
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/* Shadow virtqueue to relay notifications */
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typedef struct VhostShadowVirtqueue {
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/* Shadow vring */
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@@ -69,6 +90,12 @@ typedef struct VhostShadowVirtqueue {
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*/
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uint16_t *desc_next;
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+ /* Caller callbacks */
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+ const VhostShadowVirtqueueOps *ops;
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+
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+ /* Caller callbacks opaque */
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+ void *ops_opaque;
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+
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/* Next head to expose to the device */
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uint16_t shadow_avail_idx;
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@@ -102,7 +129,9 @@ void vhost_svq_start(VhostShadowVirtqueue *svq, VirtIODevice *vdev,
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VirtQueue *vq);
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void vhost_svq_stop(VhostShadowVirtqueue *svq);
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-VhostShadowVirtqueue *vhost_svq_new(VhostIOVATree *iova_tree);
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+VhostShadowVirtqueue *vhost_svq_new(VhostIOVATree *iova_tree,
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+ const VhostShadowVirtqueueOps *ops,
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+ void *ops_opaque);
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void vhost_svq_free(gpointer vq);
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(VhostShadowVirtqueue, vhost_svq_free);
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diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
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index 33dcaa135e..28df57b12e 100644
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--- a/hw/virtio/vhost-vdpa.c
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+++ b/hw/virtio/vhost-vdpa.c
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@@ -416,8 +416,9 @@ static int vhost_vdpa_init_svq(struct vhost_dev *hdev, struct vhost_vdpa *v,
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shadow_vqs = g_ptr_array_new_full(hdev->nvqs, vhost_svq_free);
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for (unsigned n = 0; n < hdev->nvqs; ++n) {
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- g_autoptr(VhostShadowVirtqueue) svq = vhost_svq_new(v->iova_tree);
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+ g_autoptr(VhostShadowVirtqueue) svq;
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+ svq = vhost_svq_new(v->iova_tree, NULL, NULL);
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if (unlikely(!svq)) {
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error_setg(errp, "Cannot create svq %u", n);
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return -1;
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--
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2.31.1
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