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From: "Michael S. Tsirkin" <mst@redhat.com>
To: qemu-devel@nongnu.org
Cc: Peter Maydell <peter.maydell@linaro.org>
Subject: [PULL 01/10] Revert "virtio-pci: add support for configure interrupt"
Date: Mon, 10 Jan 2022 02:16:04 -0500	[thread overview]
Message-ID: <20220110071547.195669-2-mst@redhat.com> (raw)
In-Reply-To: <20220110071547.195669-1-mst@redhat.com>

This reverts commit d5d24d859c3957ea1674d0e102f96439cdbfe93a.
---
 hw/virtio/virtio-pci.h |  4 +-
 hw/virtio/virtio-pci.c | 92 ++++++------------------------------------
 2 files changed, 13 insertions(+), 83 deletions(-)

diff --git a/hw/virtio/virtio-pci.h b/hw/virtio/virtio-pci.h
index b704acc5a8..2446dcd9ae 100644
--- a/hw/virtio/virtio-pci.h
+++ b/hw/virtio/virtio-pci.h
@@ -251,7 +251,5 @@ void virtio_pci_types_register(const VirtioPCIDeviceTypeInfo *t);
  * @fixed_queues.
  */
 unsigned virtio_pci_optimal_num_queues(unsigned fixed_queues);
-void virtio_pci_set_guest_notifier_fd_handler(VirtIODevice *vdev, VirtQueue *vq,
-                                              int n, bool assign,
-                                              bool with_irqfd);
+
 #endif
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index 98fb5493ae..7201cf3dc1 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -727,8 +727,7 @@ static int virtio_pci_get_notifier(VirtIOPCIProxy *proxy, int queue_no,
     VirtQueue *vq;
 
     if (queue_no == VIRTIO_CONFIG_IRQ_IDX) {
-        *n = virtio_config_get_guest_notifier(vdev);
-        *vector = vdev->config_vector;
+        return -1;
     } else {
         if (!virtio_queue_get_num(vdev, queue_no)) {
             return -1;
@@ -803,10 +802,6 @@ static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs)
     return ret;
 }
 
-static int kvm_virtio_pci_vector_config_use(VirtIOPCIProxy *proxy)
-{
-    return kvm_virtio_pci_vector_use_one(proxy, VIRTIO_CONFIG_IRQ_IDX);
-}
 
 static void kvm_virtio_pci_vector_release_one(VirtIOPCIProxy *proxy,
                                               int queue_no)
@@ -844,11 +839,6 @@ static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs)
     }
 }
 
-static void kvm_virtio_pci_vector_config_release(VirtIOPCIProxy *proxy)
-{
-    kvm_virtio_pci_vector_release_one(proxy, VIRTIO_CONFIG_IRQ_IDX);
-}
-
 static int virtio_pci_one_vector_unmask(VirtIOPCIProxy *proxy,
                                        unsigned int queue_no,
                                        unsigned int vector,
@@ -930,17 +920,9 @@ static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector,
         }
         vq = virtio_vector_next_queue(vq);
     }
-    /* unmask config intr */
-    n = virtio_config_get_guest_notifier(vdev);
-    ret = virtio_pci_one_vector_unmask(proxy, VIRTIO_CONFIG_IRQ_IDX, vector,
-                                       msg, n);
-    if (ret < 0) {
-        goto undo_config;
-    }
+
     return 0;
-undo_config:
-    n = virtio_config_get_guest_notifier(vdev);
-    virtio_pci_one_vector_mask(proxy, VIRTIO_CONFIG_IRQ_IDX, vector, n);
+
 undo:
     vq = virtio_vector_first_queue(vdev, vector);
     while (vq && unmasked >= 0) {
@@ -974,8 +956,6 @@ static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector)
         }
         vq = virtio_vector_next_queue(vq);
     }
-    n = virtio_config_get_guest_notifier(vdev);
-    virtio_pci_one_vector_mask(proxy, VIRTIO_CONFIG_IRQ_IDX, vector, n);
 }
 
 static void virtio_pci_vector_poll(PCIDevice *dev,
@@ -1007,34 +987,6 @@ static void virtio_pci_vector_poll(PCIDevice *dev,
             msix_set_pending(dev, vector);
         }
     }
-    /* poll the config intr */
-    ret = virtio_pci_get_notifier(proxy, VIRTIO_CONFIG_IRQ_IDX, &notifier,
-                                  &vector);
-    if (ret < 0) {
-        return;
-    }
-    if (vector < vector_start || vector >= vector_end ||
-        !msix_is_masked(dev, vector)) {
-        return;
-    }
-    if (k->guest_notifier_pending) {
-        if (k->guest_notifier_pending(vdev, VIRTIO_CONFIG_IRQ_IDX)) {
-            msix_set_pending(dev, vector);
-        }
-    } else if (event_notifier_test_and_clear(notifier)) {
-        msix_set_pending(dev, vector);
-    }
-}
-
-void virtio_pci_set_guest_notifier_fd_handler(VirtIODevice *vdev, VirtQueue *vq,
-                                              int n, bool assign,
-                                              bool with_irqfd)
-{
-    if (n == VIRTIO_CONFIG_IRQ_IDX) {
-        virtio_config_set_guest_notifier_fd_handler(vdev, assign, with_irqfd);
-    } else {
-        virtio_queue_set_guest_notifier_fd_handler(vq, assign, with_irqfd);
-    }
 }
 
 static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign,
@@ -1043,25 +995,17 @@ static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign,
     VirtIOPCIProxy *proxy = to_virtio_pci_proxy(d);
     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
-    VirtQueue *vq = NULL;
-    EventNotifier *notifier = NULL;
-
-    if (n == VIRTIO_CONFIG_IRQ_IDX) {
-        notifier = virtio_config_get_guest_notifier(vdev);
-    } else {
-        vq = virtio_get_queue(vdev, n);
-        notifier = virtio_queue_get_guest_notifier(vq);
-    }
+    VirtQueue *vq = virtio_get_queue(vdev, n);
+    EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
 
     if (assign) {
         int r = event_notifier_init(notifier, 0);
         if (r < 0) {
             return r;
         }
-        virtio_pci_set_guest_notifier_fd_handler(vdev, vq, n, true, with_irqfd);
+        virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
     } else {
-        virtio_pci_set_guest_notifier_fd_handler(vdev, vq, n, false,
-                                                 with_irqfd);
+        virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
         event_notifier_cleanup(notifier);
     }
 
@@ -1103,7 +1047,6 @@ static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign)
         msix_unset_vector_notifiers(&proxy->pci_dev);
         if (proxy->vector_irqfd) {
             kvm_virtio_pci_vector_release(proxy, nvqs);
-            kvm_virtio_pci_vector_config_release(proxy);
             g_free(proxy->vector_irqfd);
             proxy->vector_irqfd = NULL;
         }
@@ -1119,11 +1062,7 @@ static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign)
             goto assign_error;
         }
     }
-    r = virtio_pci_set_guest_notifier(d, VIRTIO_CONFIG_IRQ_IDX, assign,
-                                      with_irqfd);
-    if (r < 0) {
-        goto config_assign_error;
-    }
+
     /* Must set vector notifier after guest notifier has been assigned */
     if ((with_irqfd || k->guest_notifier_mask) && assign) {
         if (with_irqfd) {
@@ -1132,14 +1071,11 @@ static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign)
                           msix_nr_vectors_allocated(&proxy->pci_dev));
             r = kvm_virtio_pci_vector_use(proxy, nvqs);
             if (r < 0) {
-                goto config_assign_error;
+                goto assign_error;
             }
         }
-        r = kvm_virtio_pci_vector_config_use(proxy);
-        if (r < 0) {
-            goto config_error;
-        }
-        r = msix_set_vector_notifiers(&proxy->pci_dev, virtio_pci_vector_unmask,
+        r = msix_set_vector_notifiers(&proxy->pci_dev,
+                                      virtio_pci_vector_unmask,
                                       virtio_pci_vector_mask,
                                       virtio_pci_vector_poll);
         if (r < 0) {
@@ -1154,11 +1090,7 @@ notifiers_error:
         assert(assign);
         kvm_virtio_pci_vector_release(proxy, nvqs);
     }
-config_error:
-    kvm_virtio_pci_vector_config_release(proxy);
-config_assign_error:
-    virtio_pci_set_guest_notifier(d, VIRTIO_CONFIG_IRQ_IDX, !assign,
-                                  with_irqfd);
+
 assign_error:
     /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
     assert(assign);
-- 
MST



  reply	other threads:[~2022-01-10  7:29 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-10  7:16 [PULL 00/10] virtio: revert config interrupt changes Michael S. Tsirkin
2022-01-10  7:16 ` Michael S. Tsirkin [this message]
2022-01-10  7:16 ` [PULL 02/10] Revert "virtio-mmio: add support for configure interrupt" Michael S. Tsirkin
2022-01-10  7:16 ` [PULL 03/10] Revert "virtio-net: " Michael S. Tsirkin
2022-01-10  7:16 ` [PULL 04/10] Revert "vhost: " Michael S. Tsirkin
2022-01-10  7:16 ` [PULL 05/10] Revert "virtio: " Michael S. Tsirkin
2022-01-10  7:16 ` [PULL 06/10] Revert "vhost-vdpa: add support for config interrupt" Michael S. Tsirkin
2022-01-10  7:16 ` [PULL 07/10] Revert "vhost: introduce new VhostOps vhost_set_config_call" Michael S. Tsirkin
2022-01-10  7:16 ` [PULL 08/10] Revert "virtio-pci: decouple the single vector from the interrupt process" Michael S. Tsirkin
2022-01-10  7:16 ` [PULL 09/10] Revert "virtio-pci: decouple notifier from " Michael S. Tsirkin
2022-01-10  7:16 ` [PULL 10/10] Revert "virtio: introduce macro IRTIO_CONFIG_IRQ_IDX" Michael S. Tsirkin
2022-01-10  7:16   ` [Virtio-fs] " Michael S. Tsirkin
2022-01-10 18:32 ` [PULL 00/10] virtio: revert config interrupt changes Peter Maydell

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