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From: "Michael S. Tsirkin" <mst@redhat.com>
To: qemu-devel@nongnu.org
Cc: Peter Maydell <peter.maydell@linaro.org>,
	Cindy Lu <lulu@redhat.com>, Jason Wang <jasowang@redhat.com>
Subject: [PULL 24/51] virtio-pci: add support for configure interrupt
Date: Thu, 5 Jan 2023 04:15:32 -0500	[thread overview]
Message-ID: <20230105091310.263867-25-mst@redhat.com> (raw)
In-Reply-To: <20230105091310.263867-1-mst@redhat.com>

From: Cindy Lu <lulu@redhat.com>

Add process to handle the configure interrupt, The function's
logic is the same with vq interrupt.Add extra process to check
the configure interrupt

Signed-off-by: Cindy Lu <lulu@redhat.com>
Message-Id: <20221222070451.936503-11-lulu@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/hw/virtio/virtio-pci.h |   4 +-
 hw/virtio/virtio-pci.c         | 118 +++++++++++++++++++++++++++------
 2 files changed, 102 insertions(+), 20 deletions(-)

diff --git a/include/hw/virtio/virtio-pci.h b/include/hw/virtio/virtio-pci.h
index 24fba1604b..ab2051b64b 100644
--- a/include/hw/virtio/virtio-pci.h
+++ b/include/hw/virtio/virtio-pci.h
@@ -261,5 +261,7 @@ 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 d7e29b1cdc..7bc60fcf94 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -836,7 +836,8 @@ static int virtio_pci_get_notifier(VirtIOPCIProxy *proxy, int queue_no,
     VirtQueue *vq;
 
     if (queue_no == VIRTIO_CONFIG_IRQ_IDX) {
-        return -1;
+        *n = virtio_config_get_guest_notifier(vdev);
+        *vector = vdev->config_vector;
     } else {
         if (!virtio_queue_get_num(vdev, queue_no)) {
             return -1;
@@ -896,7 +897,7 @@ undo:
     }
     return ret;
 }
-static int kvm_virtio_pci_vector_use(VirtIOPCIProxy *proxy, int nvqs)
+static int kvm_virtio_pci_vector_vq_use(VirtIOPCIProxy *proxy, int nvqs)
 {
     int queue_no;
     int ret = 0;
@@ -911,6 +912,10 @@ 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)
@@ -935,7 +940,7 @@ static void kvm_virtio_pci_vector_release_one(VirtIOPCIProxy *proxy,
     kvm_virtio_pci_vq_vector_release(proxy, vector);
 }
 
-static void kvm_virtio_pci_vector_release(VirtIOPCIProxy *proxy, int nvqs)
+static void kvm_virtio_pci_vector_vq_release(VirtIOPCIProxy *proxy, int nvqs)
 {
     int queue_no;
     VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
@@ -948,6 +953,11 @@ 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,
@@ -1029,9 +1039,19 @@ static int virtio_pci_vector_unmask(PCIDevice *dev, unsigned vector,
         }
         vq = virtio_vector_next_queue(vq);
     }
-
+    /* unmask config intr */
+    if (vector == vdev->config_vector) {
+        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) {
@@ -1065,6 +1085,11 @@ static void virtio_pci_vector_mask(PCIDevice *dev, unsigned vector)
         }
         vq = virtio_vector_next_queue(vq);
     }
+
+    if (vector == vdev->config_vector) {
+        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,
@@ -1096,6 +1121,34 @@ 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,
@@ -1104,17 +1157,25 @@ 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 = virtio_get_queue(vdev, n);
-    EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
+    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);
+    }
 
     if (assign) {
         int r = event_notifier_init(notifier, 0);
         if (r < 0) {
             return r;
         }
-        virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
+        virtio_pci_set_guest_notifier_fd_handler(vdev, vq, n, true, with_irqfd);
     } else {
-        virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
+        virtio_pci_set_guest_notifier_fd_handler(vdev, vq, n, false,
+                                                 with_irqfd);
         event_notifier_cleanup(notifier);
     }
 
@@ -1157,10 +1218,13 @@ static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign)
     proxy->nvqs_with_notifiers = nvqs;
 
     /* Must unset vector notifier while guest notifier is still assigned */
-    if ((proxy->vector_irqfd || k->guest_notifier_mask) && !assign) {
+    if ((proxy->vector_irqfd ||
+         (vdev->use_guest_notifier_mask && k->guest_notifier_mask)) &&
+        !assign) {
         msix_unset_vector_notifiers(&proxy->pci_dev);
         if (proxy->vector_irqfd) {
-            kvm_virtio_pci_vector_release(proxy, nvqs);
+            kvm_virtio_pci_vector_vq_release(proxy, nvqs);
+            kvm_virtio_pci_vector_config_release(proxy);
             g_free(proxy->vector_irqfd);
             proxy->vector_irqfd = NULL;
         }
@@ -1176,20 +1240,30 @@ 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 ||
+         (vdev->use_guest_notifier_mask && k->guest_notifier_mask)) &&
+        assign) {
         if (with_irqfd) {
             proxy->vector_irqfd =
                 g_malloc0(sizeof(*proxy->vector_irqfd) *
                           msix_nr_vectors_allocated(&proxy->pci_dev));
-            r = kvm_virtio_pci_vector_use(proxy, nvqs);
+            r = kvm_virtio_pci_vector_vq_use(proxy, nvqs);
             if (r < 0) {
-                goto assign_error;
+                goto config_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) {
@@ -1202,9 +1276,15 @@ static int virtio_pci_set_guest_notifiers(DeviceState *d, int nvqs, bool assign)
 notifiers_error:
     if (with_irqfd) {
         assert(assign);
-        kvm_virtio_pci_vector_release(proxy, nvqs);
+        kvm_virtio_pci_vector_vq_release(proxy, nvqs);
     }
-
+config_error:
+    if (with_irqfd) {
+        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



  parent reply	other threads:[~2023-01-05  9:25 UTC|newest]

Thread overview: 72+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-05  9:14 [PULL 00/51] virtio,pc,pci: features, cleanups, fixes Michael S. Tsirkin
2023-01-05  9:14 ` [PULL 01/51] virtio_net: Modify virtio_net_get_config to early return Michael S. Tsirkin
2023-01-05  9:14 ` [PULL 02/51] virtio_net: copy VIRTIO_NET_S_ANNOUNCE if device model has it Michael S. Tsirkin
2023-01-05  9:14 ` [PULL 03/51] vdpa: handle VIRTIO_NET_CTRL_ANNOUNCE in vhost_vdpa_net_handle_ctrl_avail Michael S. Tsirkin
2023-01-05  9:14 ` [PULL 04/51] vdpa: do not handle VIRTIO_NET_F_GUEST_ANNOUNCE in vhost-vdpa Michael S. Tsirkin
2023-01-05  9:14 ` [PULL 05/51] hw/acpi/Kconfig: Rename ACPI_X86_ICH to ACPI_ICH9 Michael S. Tsirkin
2023-01-05  9:14 ` [PULL 06/51] hw/acpi/Kconfig: Add missing dependencies " Michael S. Tsirkin
2023-01-05  9:14 ` [PULL 07/51] hw/acpi/Kconfig: Do not needlessly build TYPE_PIIX4_PM in non-PC/Malta machines Michael S. Tsirkin
2023-01-05  9:14 ` [PULL 08/51] hw/acpi/Kconfig: Add missing dependencies to ACPI_PIIX4 Michael S. Tsirkin
2023-01-05  9:14 ` [PULL 09/51] hw/isa/Kconfig: Add missing dependency to VT82C686 Michael S. Tsirkin
2023-01-05  9:14 ` [PULL 10/51] i386, mips: Resolve redundant ACPI and APM dependencies Michael S. Tsirkin
2023-01-05  9:14 ` [PULL 11/51] hw/ppc/Kconfig: Remove unused dependencies from PEGASOS2 Michael S. Tsirkin
2023-01-05  9:14 ` [PULL 12/51] vhost-user: Refactor vhost acked features saving Michael S. Tsirkin
2023-01-05  9:14 ` [PULL 13/51] vhost-user: Refactor the chr_closed_bh Michael S. Tsirkin
2023-01-05  9:15 ` [PULL 14/51] vhost-user: Fix the virtio features negotiation flaw Michael S. Tsirkin
2023-01-05  9:15 ` [PULL 15/51] virtio: introduce macro VIRTIO_CONFIG_IRQ_IDX Michael S. Tsirkin
2023-01-05  9:15 ` [PULL 16/51] virtio-pci: decouple notifier from interrupt process Michael S. Tsirkin
2023-01-05  9:15 ` [PULL 17/51] virtio-pci: decouple the single vector from the " Michael S. Tsirkin
2023-01-05  9:15 ` [PULL 18/51] vhost: introduce new VhostOps vhost_set_config_call Michael S. Tsirkin
2023-01-05  9:15 ` [PULL 19/51] vhost-vdpa: add support for config interrupt Michael S. Tsirkin
2023-01-05  9:15 ` [PULL 20/51] virtio: add support for configure interrupt Michael S. Tsirkin
2023-01-05  9:15 ` [PULL 21/51] vhost: " Michael S. Tsirkin
2023-01-05  9:21   ` Michael S. Tsirkin
2023-01-05  9:15 ` [PULL 22/51] virtio-net: " Michael S. Tsirkin
2023-01-05  9:15 ` [PULL 23/51] virtio-mmio: " Michael S. Tsirkin
2023-01-05  9:15 ` Michael S. Tsirkin [this message]
2023-01-05  9:15 ` [PULL 25/51] hw/virtio: Rename virtio_device_find() -> qmp_find_virtio_device() Michael S. Tsirkin
2023-01-05  9:15 ` [PULL 26/51] hw/virtio: Extract QMP QOM-specific functions to virtio-qmp.c Michael S. Tsirkin
2023-01-05  9:15 ` [PULL 27/51] include/hw/pci: Break inclusion loop pci_bridge.h and cxl.h Michael S. Tsirkin
2023-01-05  9:21   ` Michael S. Tsirkin
2023-01-05  9:15 ` [PULL 29/51] include/hw/cxl: Include hw/cxl/*.h where needed Michael S. Tsirkin
2023-01-05  9:15 ` [PULL 30/51] include/hw/pci: Clean up a few things checkpatch.pl would flag Michael S. Tsirkin
2023-01-05  9:15 ` [PULL 31/51] include/hw/pci: Split pci_device.h off pci.h Michael S. Tsirkin
2023-01-05  9:16 ` [PULL 34/51] include/hw/virtio: Break inclusion loop Michael S. Tsirkin
2023-01-05  9:16 ` [PULL 35/51] include: Include headers where needed Michael S. Tsirkin
2023-01-05  9:16 ` [PULL 36/51] include: Don't include qemu/osdep.h Michael S. Tsirkin
2023-01-05  9:16 ` [PULL 37/51] docs/devel: Rules on #include in headers Michael S. Tsirkin
2023-01-09 12:03   ` Markus Armbruster
2023-01-05  9:16 ` [PULL 38/51] vdpa-dev: get iova range explicitly Michael S. Tsirkin
2023-01-05  9:16 ` [PULL 39/51] vdpa: harden the error path if get_iova_range failed Michael S. Tsirkin
2023-01-05  9:16 ` [PULL 40/51] vhost: simplify vhost_dev_enable_notifiers Michael S. Tsirkin
2023-01-05  9:16 ` [PULL 41/51] vhost: configure all host notifiers in a single MR transaction Michael S. Tsirkin
2023-01-05  9:16 ` [PULL 42/51] vdpa: commit all host notifier MRs " Michael S. Tsirkin
2023-01-05  9:16 ` [PULL 43/51] virtio-pci: fix proxy->vector_irqfd leak in virtio_pci_set_guest_notifiers Michael S. Tsirkin
2023-01-05  9:16 ` [PULL 44/51] tests: virt: Allow changes to PPTT test table Michael S. Tsirkin
2023-01-05  9:16 ` [PULL 45/51] hw/acpi/aml-build: Only generate cluster node in PPTT when specified Michael S. Tsirkin
2023-05-10 10:13   ` Philippe Mathieu-Daudé
2023-05-13  7:22     ` Yicong Yang via
2023-01-05  9:16 ` [PULL 46/51] tests: virt: Update expected ACPI tables for virt test Michael S. Tsirkin
2023-01-05  9:16 ` [PULL 47/51] tests: acpi: Add and whitelist *.topology blobs Michael S. Tsirkin
2023-01-05  9:16 ` [PULL 48/51] tests: acpi: aarch64: Add topology test for aarch64 Michael S. Tsirkin
2023-01-05  9:17 ` [PULL 49/51] tests: acpi: aarch64: Add *.topology tables Michael S. Tsirkin
2023-01-05  9:17 ` [PULL 50/51] acpi: cpuhp: fix guest-visible maximum access size to the legacy reg block Michael S. Tsirkin
2023-01-05  9:56   ` Michael S. Tsirkin
2023-01-05 16:01     ` Laszlo Ersek
2023-01-05 16:29       ` Philippe Mathieu-Daudé
2023-01-05 16:35         ` Michael S. Tsirkin
2023-01-05  9:17 ` [PULL 51/51] vhost-scsi: fix memleak of vsc->inflight Michael S. Tsirkin
2023-01-05  9:21 ` [PULL 28/51] include/hw/cxl: Move typedef PXBDev to cxl.h, and put it to use Michael S. Tsirkin
2023-01-05  9:22 ` [PULL 32/51] include/hw/pci: Include hw/pci/pci.h where needed Michael S. Tsirkin
2023-01-05  9:22 ` [PULL 33/51] include/hw/cxl: Break inclusion loop cxl_pci.h and cxl_cdat_h Michael S. Tsirkin
2023-01-05  9:56 ` [PULL 00/51] virtio,pc,pci: features, cleanups, fixes Michael S. Tsirkin
2023-01-05 16:31   ` Michael S. Tsirkin
2023-01-05 21:04     ` Peter Maydell
2023-01-05 21:50       ` Michael S. Tsirkin
2023-01-05 21:53       ` Michael S. Tsirkin
2023-01-06 15:29         ` Peter Maydell
2023-01-08 13:57           ` Michael S. Tsirkin
2023-01-09 13:43             ` Markus Armbruster
2023-01-10 18:28               ` Markus Armbruster
2023-01-09 15:54             ` Peter Maydell
2023-01-05 16:30 ` [PULL v2 50/51] acpi: cpuhp: fix guest-visible maximum access size to the legacy reg block Michael S. Tsirkin

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