Michael Brown 0be8491b71 [pci] Avoid scanning nonexistent buses when using PCIAPI_DIRECT ...

There is no method for obtaining the number of PCI buses when using
PCIAPI_DIRECT, and we therefore currently scan all possible bus
numbers.  This can cause a several-second startup delay in some
virtualised environments, since PCI configuration space access will
necessarily require the involvement of the hypervisor.

Ameliorate this situation by defaulting to scanning only a single bus,
and expanding the number of PCI buses to accommodate any subordinate
buses that are detected during enumeration.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

2021-04-10 15:05:05 +01:00

..

cdc.c

[legal] Relicense files under GPL2_OR_LATER_OR_UBDL

2015-03-02 14:17:31 +00:00

eisa.c

[device] Make driver name a generic device property

2011-04-07 23:09:19 +01:00

isa_ids.c

[build] Rename gPXE to iPXE

2010-04-19 23:43:39 +01:00

isa.c

[build] Inhibit spurious array bounds warning on some versions of gcc

2021-01-15 20:54:27 +00:00

isapnp.c

[legal] Update FSF mailing address in GPL licence texts

2012-07-20 19:55:45 +01:00

mca.c

[device] Make driver name a generic device property

2011-04-07 23:09:19 +01:00

pci_settings.c

[pci] Support systems with multiple PCI root bridges

2016-06-09 09:36:28 +01:00

pci.c

[pci] Avoid scanning nonexistent buses when using PCIAPI_DIRECT

2021-04-10 15:05:05 +01:00

pcibackup.c

[legal] Relicense files under GPL2_OR_LATER_OR_UBDL

2015-03-02 14:17:31 +00:00

pciea.c

[pci] Add support for PCI Enhanced Allocation

2016-05-20 16:51:56 +01:00

pciextra.c

[pci] Add pci_find_next_capability()

2016-04-15 17:27:35 +01:00

pcimsix.c

[pci] Update drivers to use pci_ioremap()

2020-09-25 14:17:07 +01:00

pcivpd.c

[legal] Relicense files under GPL2_OR_LATER_OR_UBDL

2015-03-02 14:17:31 +00:00

usb.c

[efi] Avoid dragging in USB subsystem via efi_usb_path()

2020-10-30 13:54:55 +00:00

virtio-pci.c

[pci] Update drivers to use pci_ioremap()

2020-09-25 14:17:07 +01:00

virtio-ring.c

[virtio] Add virtio 1.0 PCI support

2016-04-15 17:41:26 +01:00