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| author | Jan Kiszka <jan.kiszka@siemens.com> | 2018-01-19 11:06:30 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-01-20 08:15:44 +0100 |
| commit | 3b42349d56c96e144401d2317d8eeb9937511423 (patch) | |
| tree | e108e9fb5db5c4270a90c87366905f615478d790 /arch/x86/kernel | |
| parent | 11f19ec025dd421c54978c69e42d86758fa310de (diff) | |
| download | linux-3b42349d56c96e144401d2317d8eeb9937511423.tar.bz2 | |
x86/jailhouse: Respect pci=lastbus command line settings
Limiting the scan width to the known last bus via the command line can
accelerate the boot noteworthy.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jailhouse <jailhouse-dev@googlegroups.com>
Link: https://lkml.kernel.org/r/51f5fe62-ca8f-9286-5cdb-39df3fad78b4@siemens.com
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/jailhouse.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/kernel/jailhouse.c b/arch/x86/kernel/jailhouse.c index 2b7ebbe9043d..b68fd895235a 100644 --- a/arch/x86/kernel/jailhouse.c +++ b/arch/x86/kernel/jailhouse.c @@ -119,8 +119,10 @@ static int __init jailhouse_pci_arch_init(void) /* * There are no bridges on the virtual PCI root bus under Jailhouse, * thus no other way to discover all devices than a full scan. + * Respect any overrides via the command line, though. */ - pcibios_last_bus = 0xff; + if (pcibios_last_bus < 0) + pcibios_last_bus = 0xff; return 0; } |