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Commit a9322f64 authored by Stefan Assmann's avatar Stefan Assmann Committed by Ingo Molnar
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x86, pci: introduce pci=noioapicquirk kernel cmdline option 



Introduce pci=noioapicquirk kernel cmdline option to disable all boot
interrupt quirks

Signed-off-by: default avatarStefan Assmann <sassmann@suse.de>
Signed-off-by: default avatarOlaf Dabrunz <od@suse.de>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 747ada36

Documentation/kernel-parameters.txt

+3 −0
Original line number Diff line number Diff line
@@ -1518,6 +1518,9 @@ and is between 256 and 4096 characters. It is defined in the file 
		nomsi		[MSI] If the PCI_MSI kernel config parameter is

				enabled, this kernel boot option can be used to

				disable the use of MSI interrupts system-wide.

		noioapicquirk	[APIC] Disable all boot interrupt quirks.

				Safety option to keep boot IRQs enabled. This

				should never be necessary.

		biosirq		[X86-32] Use PCI BIOS calls to get the interrupt

				routing table. These calls are known to be buggy

				on several machines and they hang the machine

arch/x86/pci/common.c

+4 −0
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ unsigned int pci_probe = PCI_PROBE_BIOS | PCI_PROBE_CONF1 | PCI_PROBE_CONF2 | 


static int pci_bf_sort;

int pci_routeirq;

int noioapicquirk;

int pcibios_last_bus = -1;

unsigned long pirq_table_addr;

struct pci_bus *pci_root_bus;
@@ -495,6 +496,9 @@ char * __devinit pcibios_setup(char *str) 
	} else if (!strcmp(str, "skip_isa_align")) {

		pci_probe |= PCI_CAN_SKIP_ISA_ALIGN;

		return NULL;

	} else if (!strcmp(str, "noioapicquirk")) {

		noioapicquirk = 1;

		return NULL;

	}

	return str;

}

include/asm-x86/io_apic.h

+4 −0
Original line number Diff line number Diff line
@@ -157,11 +157,15 @@ extern int sis_apic_bug; 
/* 1 if "noapic" boot option passed */

extern int skip_ioapic_setup;



/* 1 if "noapic" boot option passed */

extern int noioapicquirk;



/* 1 if the timer IRQ uses the '8259A Virtual Wire' mode */

extern int timer_through_8259;



static inline void disable_ioapic_setup(void)

{

	noioapicquirk = 1;

	skip_ioapic_setup = 1;

}

include/asm-x86/pci.h

+1 −0
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ struct pci_sysdata { 
};



extern int pci_routeirq;

extern int noioapicquirk;



/* scan a bus after allocating a pci_sysdata for it */

extern struct pci_bus *pci_scan_bus_on_node(int busno, struct pci_ops *ops,