motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-02 15:23:53 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

pci: Allow PCI bus subtypes to support extended config space accesses

Browse source 
Some PHB implementations, eg. PAPR used on pseries machine, act like
a regular PCI bus rather than a PCIe bus, but allow access to the
PCIe extended config space anyway.

Introduce a new PCI bus class method to modelize this behaviour and
use it when adjusting the config space size limit during accesses.

No behaviour change for existing PCI bus types.

Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <155414130271.574858.4253514266378127489.stgit@bahia.lan>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Greg Kurz 2019-04-01 19:55:02 +02:00 • committed by David Gibson
parent 5263724b78
commit 1c685a9026
4 changed files with 28 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

24
hw/pci/pci.c
View file

@ -147,6 +147,11 @@ static uint16_t pcibus_numa_node(PCIBus *bus)
return NUMA_NODE_UNASSIGNED;
}
static bool pcibus_allows_extended_config_space(PCIBus *bus)
{
return false;
}
static void pci_bus_class_init(ObjectClass *klass, void *data)
{
BusClass *k = BUS_CLASS(klass);
@ -162,6 +167,7 @@ static void pci_bus_class_init(ObjectClass *klass, void *data)
pbc->is_root = pcibus_is_root;
pbc->bus_num = pcibus_num;
pbc->numa_node = pcibus_numa_node;
pbc->allows_extended_config_space = pcibus_allows_extended_config_space;
}
static const TypeInfo pci_bus_info = {
@ -182,9 +188,22 @@ static const TypeInfo conventional_pci_interface_info = {
.parent = TYPE_INTERFACE,
};
static bool pciebus_allows_extended_config_space(PCIBus *bus)
{
return true;
}
static void pcie_bus_class_init(ObjectClass *klass, void *data)
{
PCIBusClass *pbc = PCI_BUS_CLASS(klass);
pbc->allows_extended_config_space = pciebus_allows_extended_config_space;
}
static const TypeInfo pcie_bus_info = {
.name = TYPE_PCIE_BUS,
.parent = TYPE_PCI_BUS,
.class_init = pcie_bus_class_init,
};
static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num);
@ -401,6 +420,11 @@ bool pci_bus_is_root(PCIBus *bus)
return PCI_BUS_GET_CLASS(bus)->is_root(bus);
}
bool pci_bus_allows_extended_config_space(PCIBus *bus)
{
return PCI_BUS_GET_CLASS(bus)->allows_extended_config_space(bus);
}
void pci_root_bus_new_inplace(PCIBus *bus, size_t bus_size, DeviceState *parent,
const char *name,
MemoryRegion *address_space_mem,