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| author | Michael Brown | 2021-04-10 14:14:30 +0200 |
|---|---|---|
| committer | Michael Brown | 2021-04-10 16:05:05 +0200 |
| commit | 0be8491b717fec6697dbf6ef8ac07604e062ecb1 (patch) | |
| tree | 1f5d84a13dbd6113e7e884a2795e6e01cdda3a31 /src/interface/linux/linux_sysfs.c | |
| parent | [intel] Add additional PCI device ID to table (diff) | |
| download | ipxe-0be8491b717fec6697dbf6ef8ac07604e062ecb1.tar.gz ipxe-0be8491b717fec6697dbf6ef8ac07604e062ecb1.tar.xz ipxe-0be8491b717fec6697dbf6ef8ac07604e062ecb1.zip | |
[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>
Diffstat (limited to 'src/interface/linux/linux_sysfs.c')
0 files changed, 0 insertions, 0 deletions