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[RFC,v3,2/6] pcie_sriov: Ensure PF and VF are mutually exclusive

Message ID 20240305-sriov-v3-2-abdb75770372@daynix.com (mailing list archive)
State New, archived
Headers show
Series virtio-net: add support for SR-IOV emulation | expand

Commit Message

Akihiko Odaki March 5, 2024, 8:58 a.m. UTC 
A device cannot be a SR-IOV PF and a VF at the same time.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
---
 hw/pci/pcie_sriov.c | 5 +++++
 1 file changed, 5 insertions(+)
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Patch

diff --git a/hw/pci/pcie_sriov.c b/hw/pci/pcie_sriov.c
index 09a53ed30027..aac12e70f122 100644
--- a/hw/pci/pcie_sriov.c
+++ b/hw/pci/pcie_sriov.c
@@ -41,6 +41,11 @@  bool pcie_sriov_pf_init(PCIDevice *dev, uint16_t offset,
     uint8_t *cfg = dev->config + offset;
     uint8_t *wmask;
 
+    if (pci_is_vf(dev)) {
+        error_setg(errp, "a device cannot be a SR-IOV PF and a VF at the same time");
+        return false;
+    }
+
     pcie_add_capability(dev, PCI_EXT_CAP_ID_SRIOV, 1,
                         offset, PCI_EXT_CAP_SRIOV_SIZEOF);
     dev->exp.sriov_cap = offset;