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authorAndi Kleen <ak@suse.de>2006-09-26 10:52:41 +0200
committerAndi Kleen <andi@basil.nowhere.org>2006-09-26 10:52:41 +0200
commit0637a70a5db98182d9ad3d6ae1ee30acf20afde9 (patch)
tree36b625e24f3fe11a97cd9926ca2be6b2df1cbf89 /include/asm-x86_64
parent8f60774a116ced9b73ae3913d511687889efe725 (diff)
downloadlwn-0637a70a5db98182d9ad3d6ae1ee30acf20afde9.tar.gz
lwn-0637a70a5db98182d9ad3d6ae1ee30acf20afde9.zip
[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 'include/asm-x86_64')
-rw-r--r--include/asm-x86_64/pci-direct.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-x86_64/pci-direct.h b/include/asm-x86_64/pci-direct.h
index 9d916cdaa18e..eba9cb471df3 100644
--- a/include/asm-x86_64/pci-direct.h
+++ b/include/asm-x86_64/pci-direct.h
@@ -11,4 +11,6 @@ extern u8 read_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset);
extern u16 read_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset);
extern void write_pci_config(u8 bus, u8 slot, u8 func, u8 offset, u32 val);
+extern int early_pci_allowed(void);
+
#endif