aboutsummaryrefslogtreecommitdiffstats
path: root/include/asm-x86_64/pci-direct.h
diff options
context:
space:
mode:
authorSiddha, Suresh B <suresh.b.siddha@intel.com>2006-12-06 20:14:10 -0500
committerAndi Kleen <andi@basil.nowhere.org>2006-12-06 20:14:10 -0500
commit274e1bbdeeaf16e71418f11f5f305ab26061f2c2 (patch)
treec3be672dde01817b34137d0b8d0dea563fdffabb /include/asm-x86_64/pci-direct.h
parent79929fd1c1887d2a057cbb80d487a2e2f1c01a02 (diff)
[PATCH] x86: add write_pci_config_byte() to direct PCI access routines
Mechanism of selecting physical mode in genapic when cpu hotplug is enabled on x86_64, broke the quirk(quirk_intel_irqbalance()) introduced for working around the transposing interrupt message errata in E7520/E7320/E7525 (revision ID 0x9 and below. errata #23 in http://download.intel.com/design/chipsets/specupdt/30304203.pdf). This errata requires the mode to be in logical flat, so that interrupts can be directed to more than one cpu(and thus use hardware IRQ balancing enabled by BIOS on these platforms). Following four patches fixes this by moving the quirk to early quirk and forcing the x86_64 genapic selection to logical flat on these platforms. Thanks to Shaohua for pointing out the breakage. This patch: Add write_pci_config_byte() to direct PCI access routines Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Andi Kleen <ak@suse.de> Cc: "Li, Shaohua" <shaohua.li@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org>
Diffstat (limited to 'include/asm-x86_64/pci-direct.h')
-rw-r--r--include/asm-x86_64/pci-direct.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-x86_64/pci-direct.h b/include/asm-x86_64/pci-direct.h
index eba9cb471df3..6823fa4f1afa 100644
--- a/include/asm-x86_64/pci-direct.h
+++ b/include/asm-x86_64/pci-direct.h
@@ -10,6 +10,7 @@ extern u32 read_pci_config(u8 bus, u8 slot, u8 func, u8 offset);
10extern u8 read_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset); 10extern u8 read_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset);
11extern u16 read_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset); 11extern u16 read_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset);
12extern void write_pci_config(u8 bus, u8 slot, u8 func, u8 offset, u32 val); 12extern void write_pci_config(u8 bus, u8 slot, u8 func, u8 offset, u32 val);
13extern void write_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset, u8 val);
13 14
14extern int early_pci_allowed(void); 15extern int early_pci_allowed(void);
15 16