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spapr_pci: Fix extended config space accesses 

The PAPR PHB acts as a legacy PCI bus but it allows PCIe extended
config space accesses anyway (for pseries-2.9 and newer machine
types).

Introduce a specific PCI bus subtype to inform the common PCI code
about that.

Fixes: c2077e2ca0
Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <155414130834.574858.16502276132110219890.stgit@bahia.lan>
[dwg: Apply fix so we don't rename the default pci bus, breaking everything]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Greg Kurz 2019-04-01 19:55:08 +02:00 committed by David Gibson
parent 1c685a9026
commit 5cf0d326a0
1 changed files with 26 additions and 2 deletions
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28
hw/ppc/spapr_pci.c
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@ -1638,6 +1638,28 @@ static void spapr_phb_unrealize(DeviceState *dev, Error **errp)
memory_region_del_subregion(get_system_memory(), &sphb->mem32window);
}
static bool spapr_phb_allows_extended_config_space(PCIBus *bus)
{
SpaprPhbState *sphb = SPAPR_PCI_HOST_BRIDGE(BUS(bus)->parent);
return sphb->pcie_ecs;
}
static void spapr_phb_root_bus_class_init(ObjectClass *klass, void *data)
{
PCIBusClass *pbc = PCI_BUS_CLASS(klass);
pbc->allows_extended_config_space = spapr_phb_allows_extended_config_space;
}
#define TYPE_SPAPR_PHB_ROOT_BUS "spapr-pci-host-bridge-root-bus"
static const TypeInfo spapr_phb_root_bus_info = {
.name = TYPE_SPAPR_PHB_ROOT_BUS,
.parent = TYPE_PCI_BUS,
.class_init = spapr_phb_root_bus_class_init,
};
static void spapr_phb_realize(DeviceState *dev, Error **errp)
{
/* We don't use SPAPR_MACHINE() in order to exit gracefully if the user
@ -1739,10 +1761,11 @@ static void spapr_phb_realize(DeviceState *dev, Error **errp)
memory_region_add_subregion(get_system_memory(), sphb->io_win_addr,
&sphb->iowindow);
bus = pci_register_root_bus(dev, NULL,
bus = pci_register_root_bus(dev, "pci.0",
pci_spapr_set_irq, pci_spapr_map_irq, sphb,
&sphb->memspace, &sphb->iospace,
PCI_DEVFN(0, 0), PCI_NUM_PINS, TYPE_PCI_BUS);
PCI_DEVFN(0, 0), PCI_NUM_PINS,
TYPE_SPAPR_PHB_ROOT_BUS);
phb->bus = bus;
qbus_set_hotplug_handler(BUS(phb->bus), OBJECT(sphb), NULL);
@ -2325,6 +2348,7 @@ void spapr_pci_rtas_init(void)
static void spapr_pci_register_types(void)
{
type_register_static(&spapr_phb_info);
type_register_static(&spapr_phb_root_bus_info);
}
type_init(spapr_pci_register_types)