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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/x86_64/kernel/early-quirks.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/x86_64/kernel/early-quirks.c')
-rw-r--r--arch/x86_64/kernel/early-quirks.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86_64/kernel/early-quirks.c b/arch/x86_64/kernel/early-quirks.c
index fb0c6da41b7..829698f6d04 100644
--- a/arch/x86_64/kernel/early-quirks.c
+++ b/arch/x86_64/kernel/early-quirks.c
@@ -71,6 +71,18 @@ static void ati_bugs(void)
{
}
+static void intel_bugs(void)
+{
+ u16 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
+}
+
struct chipset {
u16 vendor;
void (*f)(void);
@@ -80,6 +92,7 @@ static struct chipset early_qrk[] = {
{ PCI_VENDOR_ID_NVIDIA, nvidia_bugs },
{ PCI_VENDOR_ID_VIA, via_bugs },
{ PCI_VENDOR_ID_ATI, ati_bugs },
+ { PCI_VENDOR_ID_INTEL, intel_bugs},
{}
};