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authorSiddha, Suresh B <suresh.b.siddha@intel.com>2006-12-07 02:14:10 +0100
committerAndi Kleen <andi@basil.nowhere.org>2006-12-07 02:14:10 +0100
commitb0d0a4ba45760b10ecee9035ed45b442c1a6cc84 (patch)
tree9fbdab9d6cc010b415d38ffccc89ccf03398a89c /arch/i386/kernel/acpi/earlyquirk.c
parent9899f826fc90beba4f78083f6230e06cbe1050c9 (diff)
[PATCH] x86: fix the irqbalance quirk for E7320/E7520/E7525
Move the irqbalance quirks for E7320/E7520/E7525(Errata 23 in http://download.intel.com/design/chipsets/specupdt/30304203.pdf) to early quirks. And add a PCI quirk for these platforms to check(which happens very late during the boot) if the APIC routing is indeed set to default flat mode. This fixes the breakage(in x86_64) of this quirk due to cpu hotplug which selects physical mode instead of the logical flat(as needed for this errata workaround). 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 'arch/i386/kernel/acpi/earlyquirk.c')
-rw-r--r--arch/i386/kernel/acpi/earlyquirk.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/i386/kernel/acpi/earlyquirk.c b/arch/i386/kernel/acpi/earlyquirk.c
index c9841692bb7..4b60af7f91d 100644
--- a/arch/i386/kernel/acpi/earlyquirk.c
+++ b/arch/i386/kernel/acpi/earlyquirk.c
@@ -10,6 +10,7 @@
#include <asm/pci-direct.h>
#include <asm/acpi.h>
#include <asm/apic.h>
+#include <asm/irq.h>
#ifdef CONFIG_ACPI
@@ -49,6 +50,24 @@ static int __init check_bridge(int vendor, int device)
return 0;
}
+static void check_intel(void)
+{
+ u16 vendor, device;
+
+ vendor = read_pci_config_16(0, 0, 0, PCI_VENDOR_ID);
+
+ if (vendor != PCI_VENDOR_ID_INTEL)
+ return;
+
+ device = read_pci_config_16(0, 0, 0, PCI_DEVICE_ID);
+#ifdef CONFIG_SMP
+ if (device == PCI_DEVICE_ID_INTEL_E7320_MCH ||
+ device == PCI_DEVICE_ID_INTEL_E7520_MCH ||
+ device == PCI_DEVICE_ID_INTEL_E7525_MCH)
+ quirk_intel_irqbalance();
+#endif
+}
+
void __init check_acpi_pci(void)
{
int num, slot, func;
@@ -60,6 +79,8 @@ void __init check_acpi_pci(void)
if (!early_pci_allowed())
return;
+ check_intel();
+
/* Poor man's PCI discovery */
for (num = 0; num < 32; num++) {
for (slot = 0; slot < 32; slot++) {