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

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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
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2
include/hw/pci/pci.h
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@ -396,6 +396,8 @@ typedef PCIINTxRoute (*pci_route_irq_fn)(void *opaque, int pin);
bool pci_bus_is_express(PCIBus *bus);
bool pci_bus_is_root(PCIBus *bus);
bool pci_bus_allows_extended_config_space(PCIBus *bus);
void pci_root_bus_new_inplace(PCIBus *bus, size_t bus_size, DeviceState *parent,
const char *name,
MemoryRegion *address_space_mem,