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Merge pull request #1681 from GNS3/fix-pci-bridges

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Fix how PCI bridges are created for Qemu VMs with greater than 32 interfaces. Fixes #1665
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Jeremy Grossmann 2019-11-04 17:00:13 +07:00 committed by GitHub
commit 60beba108a
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1 changed files with 8 additions and 8 deletions
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16
gns3server/compute/qemu/qemu_vm.py
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@ -1730,18 +1730,14 @@ class QemuVM(BaseNode):
# Each 32 PCI device we need to add a PCI bridge with max 9 bridges
pci_devices = 4 + len(self._ethernet_adapters) # 4 PCI devices are use by default by qemu
bridge_id = 0
for bridge_id in range(1, math.floor(pci_devices / 32) + 1):
network_options.extend(["-device", "i82801b11-bridge,id=dmi_pci_bridge{bridge_id}".format(bridge_id=bridge_id)])
network_options.extend(["-device", "pci-bridge,id=pci-bridge{bridge_id},bus=dmi_pci_bridge{bridge_id},chassis_nr=0x1,addr=0x{bridge_id},shpc=off".format(bridge_id=bridge_id)])
if bridge_id > 1:
pci_bridges = math.floor(pci_devices / 32)
pci_bridges_created = 0
if pci_bridges >= 1:
qemu_version = await self.manager.get_qemu_version(self.qemu_path)
if qemu_version and parse_version(qemu_version) < parse_version("2.4.0"):
raise QemuError("Qemu version 2.4 or later is required to run this VM with a large number of network adapters")
pci_device_id = 4 + bridge_id # Bridge consume PCI ports
pci_device_id = 4 + pci_bridges # Bridge consume PCI ports
for adapter_number, adapter in enumerate(self._ethernet_adapters):
mac = int_to_macaddress(macaddress_to_int(self._mac_address) + adapter_number)
@ -1786,6 +1782,10 @@ class QemuVM(BaseNode):
device_string = "{},mac={}".format(adapter_type, mac)
bridge_id = math.floor(pci_device_id / 32)
if bridge_id > 0:
if pci_bridges_created < bridge_id:
network_options.extend(["-device", "i82801b11-bridge,id=dmi_pci_bridge{bridge_id}".format(bridge_id=bridge_id)])
network_options.extend(["-device", "pci-bridge,id=pci-bridge{bridge_id},bus=dmi_pci_bridge{bridge_id},chassis_nr=0x1,addr=0x{bridge_id},shpc=off".format(bridge_id=bridge_id)])
pci_bridges_created += 1
addr = pci_device_id % 32
device_string = "{},bus=pci-bridge{bridge_id},addr=0x{addr:02x}".format(device_string, bridge_id=bridge_id, addr=addr)
pci_device_id += 1