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pcie: Add support for Single Root I/O Virtualization (SR/IOV)

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This patch provides the building blocks for creating an SR/IOV
PCIe Extended Capability header and register/unregister
SR/IOV Virtual Functions.

Signed-off-by: Knut Omang <knuto@ifi.uio.no>
Message-Id: <20220217174504.1051716-2-lukasz.maniak@linux.intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Knut Omang 2022-02-17 18:44:50 +01:00 • committed by Michael S. Tsirkin
parent 0ea5778f06
commit 7c0fa8dff8
9 changed files with 470 additions and 26 deletions
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5
hw/pci/pcie.c
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@ -446,6 +446,11 @@ void pcie_cap_slot_plug_cb(HotplugHandler *hotplug_dev, DeviceState *dev,
PCIDevice *pci_dev = PCI_DEVICE(dev);
uint32_t lnkcap = pci_get_long(exp_cap + PCI_EXP_LNKCAP);
if (pci_is_vf(pci_dev)) {
/* Virtual function cannot be physically disconnected */
return;
}
/* Don't send event when device is enabled during qemu machine creation:
* it is present on boot, no hotplug event is necessary. We do send an
* event when the device is disabled later. */