x86, pci: introduce pci=noioapicquirk kernel cmdline option

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

Signed-off-by: Stefan Assmann <sassmann@suse.de>
Signed-off-by: Olaf Dabrunz <od@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 3 insertions, 0 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 795c487af8e..1aebe9dffba 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -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