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virtio-pci: Implement SR-IOV PF

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Allow user to attach SR-IOV VF to a virtio-pci PF.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20250314-sriov-v9-6-57dae8ae3ab5@daynix.com>
Tested-by: Yui Washizu <yui.washidu@gmail.com>
Tested-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Akihiko Odaki 2025-03-14 15:14:55 +09:00 • committed by Michael S. Tsirkin
parent 19e55471d4
commit 3f9cfaa92c
2 changed files with 16 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

20
hw/virtio/virtio-pci.c
View file

@ -1962,6 +1962,7 @@ static void virtio_pci_device_plugged(DeviceState *d, Error **errp)
uint8_t *config;
uint32_t size;
VirtIODevice *vdev = virtio_bus_get_device(bus);
int16_t res;
/*
* Virtio capabilities present without
@ -2109,6 +2110,14 @@ static void virtio_pci_device_plugged(DeviceState *d, Error **errp)
pci_register_bar(&proxy->pci_dev, proxy->legacy_io_bar_idx,
PCI_BASE_ADDRESS_SPACE_IO, &proxy->bar);
}
res = pcie_sriov_pf_init_from_user_created_vfs(&proxy->pci_dev,
proxy->last_pcie_cap_offset,
errp);
if (res > 0) {
proxy->last_pcie_cap_offset += res;
virtio_add_feature(&vdev->host_features, VIRTIO_F_SR_IOV);
}
}
static void virtio_pci_device_unplugged(DeviceState *d)
@ -2199,7 +2208,7 @@ static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp)
if (pcie_port && pci_is_express(pci_dev)) {
int pos;
uint16_t last_pcie_cap_offset = PCI_CONFIG_SPACE_SIZE;
proxy->last_pcie_cap_offset = PCI_CONFIG_SPACE_SIZE;
pos = pcie_endpoint_cap_init(pci_dev, 0);
assert(pos > 0);
@ -2216,9 +2225,9 @@ static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp)
pci_set_word(pci_dev->config + pos + PCI_PM_PMC, 0x3);
if (proxy->flags & VIRTIO_PCI_FLAG_AER) {
pcie_aer_init(pci_dev, PCI_ERR_VER, last_pcie_cap_offset,
pcie_aer_init(pci_dev, PCI_ERR_VER, proxy->last_pcie_cap_offset,
PCI_ERR_SIZEOF, NULL);
last_pcie_cap_offset += PCI_ERR_SIZEOF;
proxy->last_pcie_cap_offset += PCI_ERR_SIZEOF;
}
if (proxy->flags & VIRTIO_PCI_FLAG_INIT_DEVERR) {
@ -2243,9 +2252,9 @@ static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp)
}
if (proxy->flags & VIRTIO_PCI_FLAG_ATS) {
pcie_ats_init(pci_dev, last_pcie_cap_offset,
pcie_ats_init(pci_dev, proxy->last_pcie_cap_offset,
proxy->flags & VIRTIO_PCI_FLAG_ATS_PAGE_ALIGNED);
last_pcie_cap_offset += PCI_EXT_CAP_ATS_SIZEOF;
proxy->last_pcie_cap_offset += PCI_EXT_CAP_ATS_SIZEOF;
}
if (proxy->flags & VIRTIO_PCI_FLAG_INIT_FLR) {
@ -2273,6 +2282,7 @@ static void virtio_pci_exit(PCIDevice *pci_dev)
!pci_bus_is_root(pci_get_bus(pci_dev));
bool modern_pio = proxy->flags & VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY;
pcie_sriov_pf_exit(&proxy->pci_dev);
msix_uninit_exclusive_bar(pci_dev);
if (proxy->flags & VIRTIO_PCI_FLAG_AER && pcie_port &&
pci_is_express(pci_dev)) {

1
include/hw/virtio/virtio-pci.h
View file

@ -155,6 +155,7 @@ struct VirtIOPCIProxy {
uint32_t modern_io_bar_idx;
uint32_t modern_mem_bar_idx;
int config_cap;
uint16_t last_pcie_cap_offset;
uint32_t flags;
bool disable_modern;
bool ignore_backend_features;