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hw/i386/pc: support '-nic' for xen-net-device

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The default NIC creation seems a bit hackish to me. I don't understand
why each platform has to call pci_nic_init_nofail() from a point in the
code where it actually has a pointer to the PCI bus, and then we have
the special cases for things like ne2k_isa.

If qmp_device_add() can *find* the appropriate bus and instantiate
the device on it, why can't we just do that from generic code for
creating the default NICs too?

But that isn't a yak I want to shave today. Add a xenbus field to the
PCMachineState so that it can make its way from pc_basic_device_init()
to pc_nic_init() and be handled as a special case like ne2k_isa is.

Now we can launch emulated Xen guests with '-nic user'.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
This commit is contained in:
David Woodhouse 2023-10-17 17:53:58 +01:00
parent 25967ff69f
commit c10b4b3c0d
6 changed files with 17 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

4
include/hw/i386/pc.h
View file

@ -33,6 +33,7 @@ typedef struct PCMachineState {
/* Pointers to devices and objects: */
PCIBus *bus;
BusState *xenbus;
I2CBus *smbus;
PFlashCFI01 *flash[2];
ISADevice *pcspk;
@ -184,7 +185,8 @@ void pc_basic_device_init(struct PCMachineState *pcms,
void pc_cmos_init(PCMachineState *pcms,
BusState *ide0, BusState *ide1,
ISADevice *s);
void pc_nic_init(PCMachineClass *pcmc, ISABus *isa_bus, PCIBus *pci_bus);
void pc_nic_init(PCMachineClass *pcmc, ISABus *isa_bus, PCIBus *pci_bus,
BusState *xen_bus);
void pc_i8259_create(ISABus *isa_bus, qemu_irq *i8259_irqs);

2
include/hw/xen/xen-bus.h
View file

@ -75,7 +75,7 @@ struct XenBusClass {
OBJECT_DECLARE_TYPE(XenBus, XenBusClass,
XEN_BUS)
void xen_bus_init(void);
BusState *xen_bus_init(void);
void xen_device_backend_set_state(XenDevice *xendev,
enum xenbus_state state);