From 03248e714b0dc95f13221cfd4496cbdfa118e114 Mon Sep 17 00:00:00 2001 From: David Hildenbrand Date: Tue, 28 Jan 2025 19:57:04 +0100 Subject: [PATCH] virtio-mem-pci: Allow setting nvectors, so we can use MSI-X Let's do it similar as virtio-balloon-pci. With this change, we can use virtio-mem-pci on s390x, although plugging will still fail until properly wired up in the machine. No need to worry about transitional/non_transitional devices, because they don't exist for virtio-mem. Signed-off-by: David Hildenbrand Reviewed-by: Thomas Huth Message-ID: <20250128185705.1609038-2-david@redhat.com> Signed-off-by: Thomas Huth --- hw/core/machine.c | 1 + hw/virtio/virtio-mem-pci.c | 12 ++++++++++++ 2 files changed, 13 insertions(+) diff --git a/hw/core/machine.c b/hw/core/machine.c index 8f396ef803..7b74cde10a 100644 --- a/hw/core/machine.c +++ b/hw/core/machine.c @@ -41,6 +41,7 @@ GlobalProperty hw_compat_9_2[] = { { "virtio-balloon-pci", "vectors", "0" }, { "virtio-balloon-pci-transitional", "vectors", "0" }, { "virtio-balloon-pci-non-transitional", "vectors", "0" }, + { "virtio-mem-pci", "vectors", "0" }, }; const size_t hw_compat_9_2_len = G_N_ELEMENTS(hw_compat_9_2); diff --git a/hw/virtio/virtio-mem-pci.c b/hw/virtio/virtio-mem-pci.c index 1b4e9a3284..6cc5f0fd3b 100644 --- a/hw/virtio/virtio-mem-pci.c +++ b/hw/virtio/virtio-mem-pci.c @@ -22,6 +22,10 @@ static void virtio_mem_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp) VirtIOMEMPCI *mem_pci = VIRTIO_MEM_PCI(vpci_dev); DeviceState *vdev = DEVICE(&mem_pci->vdev); + if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) { + vpci_dev->nvectors = 2; + } + virtio_pci_force_virtio_1(vpci_dev); qdev_realize(vdev, BUS(&vpci_dev->bus), errp); } @@ -152,6 +156,13 @@ static void virtio_mem_pci_set_requested_size(Object *obj, Visitor *v, object_property_set(OBJECT(&pci_mem->vdev), name, v, errp); } +static const Property virtio_mem_pci_class_properties[] = { + DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, + VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true), + DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, + DEV_NVECTORS_UNSPECIFIED), +}; + static void virtio_mem_pci_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); @@ -164,6 +175,7 @@ static void virtio_mem_pci_class_init(ObjectClass *klass, void *data) set_bit(DEVICE_CATEGORY_MISC, dc->categories); pcidev_k->revision = VIRTIO_PCI_ABI_VERSION; pcidev_k->class_id = PCI_CLASS_OTHERS; + device_class_set_props(dc, virtio_mem_pci_class_properties); mdc->get_addr = virtio_mem_pci_get_addr; mdc->set_addr = virtio_mem_pci_set_addr; -- 2.49.0