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[PATCH for-9.2 v7 6/9] virtio-pci: Implement SR-IOV PF
From: |
Akihiko Odaki |
Subject: |
[PATCH for-9.2 v7 6/9] virtio-pci: Implement SR-IOV PF |
Date: |
Tue, 13 Aug 2024 15:37:05 +0900 |
Allow user to attach SR-IOV VF to a virtio-pci PF.
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
---
include/hw/virtio/virtio-pci.h | 1 +
hw/virtio/virtio-pci.c | 20 +++++++++++++++-----
2 files changed, 16 insertions(+), 5 deletions(-)
diff --git a/include/hw/virtio/virtio-pci.h b/include/hw/virtio/virtio-pci.h
index 9e67ba38c748..34539f2f6722 100644
--- a/include/hw/virtio/virtio-pci.h
+++ b/include/hw/virtio/virtio-pci.h
@@ -152,6 +152,7 @@ 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;
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index 9534730bba19..0c8fcc5627d5 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -1955,6 +1955,7 @@ 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
@@ -2100,6 +2101,14 @@ 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)
@@ -2187,7 +2196,7 @@ 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);
@@ -2207,9 +2216,9 @@ 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) {
@@ -2234,9 +2243,9 @@ 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) {
@@ -2263,6 +2272,7 @@ static void virtio_pci_exit(PCIDevice *pci_dev)
bool pcie_port = pci_bus_is_express(pci_get_bus(pci_dev)) &&
!pci_bus_is_root(pci_get_bus(pci_dev));
+ 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)) {
--
2.46.0
- [PATCH for-9.2 v7 0/9] virtio-net: add support for SR-IOV emulation, Akihiko Odaki, 2024/08/13
- [PATCH for-9.2 v7 1/9] hw/pci: Do not add ROM BAR for SR-IOV VF, Akihiko Odaki, 2024/08/13
- [PATCH for-9.2 v7 2/9] hw/pci: Fix SR-IOV VF number calculation, Akihiko Odaki, 2024/08/13
- [PATCH for-9.2 v7 3/9] pcie_sriov: Ensure PF and VF are mutually exclusive, Akihiko Odaki, 2024/08/13
- [PATCH for-9.2 v7 4/9] pcie_sriov: Check PCI Express for SR-IOV PF, Akihiko Odaki, 2024/08/13
- [PATCH for-9.2 v7 5/9] pcie_sriov: Allow user to create SR-IOV device, Akihiko Odaki, 2024/08/13
- [PATCH for-9.2 v7 6/9] virtio-pci: Implement SR-IOV PF,
Akihiko Odaki <=
- [PATCH for-9.2 v7 7/9] virtio-net: Implement SR-IOV VF, Akihiko Odaki, 2024/08/13
- [PATCH for-9.2 v7 8/9] docs: Document composable SR-IOV device, Akihiko Odaki, 2024/08/13
- [PATCH for-9.2 v7 9/9] pcie_sriov: Make a PCI device with user-created VF ARI-capable, Akihiko Odaki, 2024/08/13
- Re: [PATCH for-9.2 v7 0/9] virtio-net: add support for SR-IOV emulation, Yui Washizu, 2024/08/21