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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
.github/workflows [linux] Use host glibc system call wrappers 2021-02-28 23:28:23 +00:00
contrib [cloud] Add utility for importing images to AWS EC2 2021-02-16 00:27:40 +00:00
src [pci] Avoid scanning nonexistent buses when using PCIAPI_DIRECT 2021-04-10 15:05:05 +01:00
COPYING [legal] Update GPLv2 licence text 2015-02-26 17:59:53 +00:00
COPYING.GPLv2 [legal] Update GPLv2 licence text 2015-02-26 17:59:53 +00:00
COPYING.UBDL [legal] Add support for the Unmodified Binary Distribution Licence 2015-03-02 12:07:14 +00:00
README [doc] Re-add README file 2010-05-28 00:03:47 +01:00

README 

iPXE README File

Quick start guide:

   cd src
   make

For any more detailed instructions, see http://ipxe.org