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authorAndi Kleen <ak@suse.de>2006-09-26 04:52:41 -0400
committerAndi Kleen <andi@basil.nowhere.org>2006-09-26 04:52:41 -0400
commit0637a70a5db98182d9ad3d6ae1ee30acf20afde9 (patch)
tree36b625e24f3fe11a97cd9926ca2be6b2df1cbf89 /arch/x86_64/mm/k8topology.c
parent8f60774a116ced9b73ae3913d511687889efe725 (diff)
[PATCH] x86: Allow disabling early pci scans with pci=noearly or disallowing conf1
Some buggy systems can machine check when config space accesses happen for some non existent devices. i386/x86-64 do some early device scans that might trigger this. Allow pci=noearly to disable this. Also when type 1 is disabling also don't do any early accesses which are always type1. This moves the pci= configuration parsing to be a early parameter. I don't think this can break anything because it only changes a single global that is only used by PCI. Cc: gregkh@suse.de Cc: Trammell Hudson <hudson@osresearch.net> Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'arch/x86_64/mm/k8topology.c')
-rw-r--r--arch/x86_64/mm/k8topology.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86_64/mm/k8topology.c b/arch/x86_64/mm/k8topology.c
index 7c45c2d2b8b2..5cf594f9230d 100644
--- a/arch/x86_64/mm/k8topology.c
+++ b/arch/x86_64/mm/k8topology.c
@@ -54,6 +54,9 @@ int __init k8_scan_nodes(unsigned long start, unsigned long end)
54 54
55 nodes_clear(nodes_parsed); 55 nodes_clear(nodes_parsed);
56 56
57 if (!early_pci_allowed())
58 return -1;
59
57 nb = find_northbridge(); 60 nb = find_northbridge();
58 if (nb < 0) 61 if (nb < 0)
59 return nb; 62 return nb;