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From 181705090c9963c2da97811838ace5bb058737c6 Mon Sep 17 00:00:00 2001
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From: Cindy Lu <lulu@redhat.com>
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Date: Thu, 22 Dec 2022 15:04:50 +0800
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Subject: [PATCH 09/31] virtio-mmio: add support for configure interrupt
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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: Cindy Lu <lulu@redhat.com>
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RH-MergeRequest: 132: vhost-vdpa: support config interrupt in vhost-vdpa
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RH-Bugzilla: 1905805
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RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
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RH-Acked-by: Eugenio Pérez <eperezma@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Commit: [9/10] 742cc2b425ffd7bbd393772526e7481446ee131c (lulu6/qemu-kvm3)
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https://bugzilla.redhat.com/show_bug.cgi?id=1905805
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Add configure interrupt support in virtio-mmio bus.
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add function to set configure guest notifier.
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Signed-off-by: Cindy Lu <lulu@redhat.com>
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Message-Id: <20221222070451.936503-10-lulu@redhat.com>
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Acked-by: Jason Wang <jasowang@redhat.com>
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Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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(cherry picked from commit cd336e834620ea78edef049c3567f312974e475b)
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Signed-off-by: Cindy Lu <lulu@redhat.com>
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---
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hw/virtio/virtio-mmio.c | 27 +++++++++++++++++++++++++++
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1 file changed, 27 insertions(+)
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diff --git a/hw/virtio/virtio-mmio.c b/hw/virtio/virtio-mmio.c
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index d240efef97..103260ec15 100644
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--- a/hw/virtio/virtio-mmio.c
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+++ b/hw/virtio/virtio-mmio.c
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@@ -670,7 +670,30 @@ static int virtio_mmio_set_guest_notifier(DeviceState *d, int n, bool assign,
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return 0;
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}
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+static int virtio_mmio_set_config_guest_notifier(DeviceState *d, bool assign,
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+ bool with_irqfd)
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+{
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+ VirtIOMMIOProxy *proxy = VIRTIO_MMIO(d);
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+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
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+ VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
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+ EventNotifier *notifier = virtio_config_get_guest_notifier(vdev);
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+ int r = 0;
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+ if (assign) {
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+ r = event_notifier_init(notifier, 0);
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+ if (r < 0) {
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+ return r;
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+ }
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+ virtio_config_set_guest_notifier_fd_handler(vdev, assign, with_irqfd);
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+ } else {
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+ virtio_config_set_guest_notifier_fd_handler(vdev, assign, with_irqfd);
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+ event_notifier_cleanup(notifier);
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+ }
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+ if (vdc->guest_notifier_mask && vdev->use_guest_notifier_mask) {
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+ vdc->guest_notifier_mask(vdev, VIRTIO_CONFIG_IRQ_IDX, !assign);
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+ }
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+ return r;
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+}
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static int virtio_mmio_set_guest_notifiers(DeviceState *d, int nvqs,
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bool assign)
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{
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@@ -692,6 +715,10 @@ static int virtio_mmio_set_guest_notifiers(DeviceState *d, int nvqs,
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goto assign_error;
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}
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}
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+ r = virtio_mmio_set_config_guest_notifier(d, assign, with_irqfd);
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+ if (r < 0) {
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+ goto assign_error;
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+ }
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return 0;
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--
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2.31.1
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