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authorStefan Assmann <sassmann@suse.de>2008-07-15 13:48:55 +0200
committerIngo Molnar <mingo@elte.hu>2008-07-18 19:31:19 +0200
commit41b9eb264c8407655db57b60b4457fe1b2ec9977 (patch)
tree873262f099a1b5b437de11fad5d7bb1070d9f828 /arch/x86/pci
parent3e370b29d35fb01bfb92c2814d6f79bf6a2cb970 (diff)
x86, pci: introduce config option for pci reroute quirks (was: [PATCH 0/3] Boot IRQ quirks for Broadcom and AMD/ATI)
This is against linux-2.6-tip, branch pci-ioapic-boot-irq-quirks. From: Stefan Assmann <sassmann@suse.de> Subject: Introduce config option for pci reroute quirks The config option X86_REROUTE_FOR_BROKEN_BOOT_IRQS is introduced to enable (or disable) the redirection of the interrupt handler to the boot interrupt line by default. Depending on the existence of interrupt masking / threaded interrupt handling in the kernel (vanilla, rt, ...) and the maturity of the rerouting patch, users can enable or disable the redirection by default. This means that the reroute quirk can be applied to any kernel without changing it. Interrupt sharing could be increased if this option is enabled. However this option is vital for threaded interrupt handling, as done by the RT kernel. It should simplify the consolidation with the RT kernel. The option can be overridden by either pci=ioapicreroute or pci=noioapicreroute. Signed-off-by: Stefan Assmann <sassmann@suse.de> Signed-off-by: Olaf Dabrunz <od@suse.de> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: Jon Masters <jonathan@jonmasters.org> Cc: Ihno Krumreich <ihno@suse.de> Cc: Sven Dietrich <sdietrich@suse.de> Cc: Daniel Gollub <dgollub@suse.de> Cc: Felix Foerster <ffoerster@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/pci')
-rw-r--r--arch/x86/pci/common.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index 1485a26ddcef..bb1a01f089e2 100644
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -24,7 +24,11 @@ unsigned int pci_early_dump_regs;
static int pci_bf_sort;
int pci_routeirq;
int noioapicquirk;
+#ifdef CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS
+int noioapicreroute = 0;
+#else
int noioapicreroute = 1;
+#endif
int pcibios_last_bus = -1;
unsigned long pirq_table_addr;
struct pci_bus *pci_root_bus;
@@ -528,6 +532,10 @@ char * __devinit pcibios_setup(char *str)
if (noioapicreroute != -1)
noioapicreroute = 0;
return NULL;
+ } else if (!strcmp(str, "noioapicreroute")) {
+ if (noioapicreroute != -1)
+ noioapicreroute = 1;
+ return NULL;
}
return str;
}