Commit-ID: 3b42349d56c96e144401d2317d8eeb9937511423 Gitweb: https://git.kernel.org/tip/3b42349d56c96e144401d2317d8eeb9937511423 Author: Jan Kiszka <jan.kis...@siemens.com> AuthorDate: Fri, 19 Jan 2018 11:06:30 +0100 Committer: Thomas Gleixner <t...@linutronix.de> CommitDate: Sat, 20 Jan 2018 08:15:44 +0100
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.kis...@siemens.com> Signed-off-by: Thomas Gleixner <t...@linutronix.de> Cc: Jailhouse <jailhouse-...@googlegroups.com> Link: https://lkml.kernel.org/r/51f5fe62-ca8f-9286-5cdb-39df3fad7...@siemens.com --- arch/x86/kernel/jailhouse.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/x86/kernel/jailhouse.c b/arch/x86/kernel/jailhouse.c index 2b7ebbe..b68fd89 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; }
