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-rw-r--r--arch/x86/kernel/early-quirks.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c
index 3755ef4..94ab6b9 100644
--- a/arch/x86/kernel/early-quirks.c
+++ b/arch/x86/kernel/early-quirks.c
@@ -18,6 +18,7 @@
#include <asm/apic.h>
#include <asm/iommu.h>
#include <asm/gart.h>
+#include <asm/irq_remapping.h>
static void __init fix_hypertransport_config(int num, int slot, int func)
{
@@ -192,6 +193,21 @@ static void __init ati_bugs_contd(int num, int slot, int func)
}
#endif
+static void __init intel_remapping_check(int num, int slot, int func)
+{
+ u8 revision;
+
+ revision = read_pci_config_byte(num, slot, func, PCI_REVISION_ID);
+
+ /*
+ * Revision 0x13 of this chipset supports irq remapping
+ * but has an erratum that breaks its behavior, flag it as such
+ */
+ if (revision == 0x13)
+ set_irq_remapping_broken();
+
+}
+
#define QFLAG_APPLY_ONCE 0x1
#define QFLAG_APPLIED 0x2
#define QFLAG_DONE (QFLAG_APPLY_ONCE|QFLAG_APPLIED)
@@ -221,6 +237,10 @@ static struct chipset early_qrk[] __initdata = {
PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, 0, ati_bugs },
{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_SBX00_SMBUS,
PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, 0, ati_bugs_contd },
+ { PCI_VENDOR_ID_INTEL, 0x3403, PCI_CLASS_BRIDGE_HOST,
+ PCI_BASE_CLASS_BRIDGE, 0, intel_remapping_check },
+ { PCI_VENDOR_ID_INTEL, 0x3406, PCI_CLASS_BRIDGE_HOST,
+ PCI_BASE_CLASS_BRIDGE, 0, intel_remapping_check },
{}
};

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