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pci: Eliminate pci_find_primary_bus()

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pci_find_primary_bus() only has one user, in pc_xen_hvm_init().  That's
inside the machine construction code, so it already has easy access to the
machine's primary PCI bus.

Get it directly, and thereby remove pci_find_primary_bus().  This removes
one of only a handful of users of the ugly pci_host_bridges global.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
This commit is contained in:
David Gibson 2017-11-29 19:46:28 +11:00 committed by Michael S. Tsirkin
parent fd56e0612b
commit e492dc5a26
3 changed files with 2 additions and 23 deletions
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8
hw/i386/pc_piix.c
View File

@ -394,7 +394,7 @@ static void pc_xen_hvm_init_pci(MachineState *machine)
static void pc_xen_hvm_init(MachineState *machine)
{
PCIBus *bus;
PCMachineState *pcms = PC_MACHINE(machine);
if (!xen_enabled()) {
error_report("xenfv machine requires the xen accelerator");
@ -402,11 +402,7 @@ static void pc_xen_hvm_init(MachineState *machine)
}
pc_xen_hvm_init_pci(machine);
bus = pci_find_primary_bus();
if (bus != NULL) {
pci_create_simple(bus, -1, "xen-platform");
}
pci_create_simple(pcms->bus, -1, "xen-platform");
}
#endif

16
hw/pci/pci.c
View File

@ -331,22 +331,6 @@ static void pci_host_bus_register(DeviceState *host)
QLIST_INSERT_HEAD(&pci_host_bridges, host_bridge, next);
}
PCIBus *pci_find_primary_bus(void)
{
PCIBus *primary_bus = NULL;
PCIHostState *host;
QLIST_FOREACH(host, &pci_host_bridges, next) {
if (primary_bus) {
/* We have multiple root buses, refuse to select a primary */
return NULL;
}
primary_bus = host->bus;
}
return primary_bus;
}
PCIBus *pci_device_root_bus(const PCIDevice *d)
{
PCIBus *bus = pci_get_bus(d);

1
include/hw/pci/pci.h
View File

@ -467,7 +467,6 @@ void pci_for_each_bus(PCIBus *bus,
pci_for_each_bus_depth_first(bus, NULL, fn, opaque);
}
PCIBus *pci_find_primary_bus(void);
PCIBus *pci_device_root_bus(const PCIDevice *d);
const char *pci_root_bus_path(PCIDevice *dev);
PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn);