Support AMD threshold vector APIC setup on 32bit

Needed for the 64bit machine check code.
Signed-off-by: Andi Kleen <ak@suse.de>

---
 arch/x86/kernel/apic_32.c                  |   24 ++++++++++++++++++++++++
 include/asm-x86/mach-default/irq_vectors.h |    3 ++-
 2 files changed, 26 insertions(+), 1 deletion(-)

Index: linux/include/asm-x86/mach-default/irq_vectors.h
===================================================================
--- linux.orig/include/asm-x86/mach-default/irq_vectors.h
+++ linux/include/asm-x86/mach-default/irq_vectors.h
@@ -41,13 +41,14 @@
  *  into a single vector (CALL_FUNCTION_VECTOR) to save vector space.
  *  TLB, reschedule and local APIC vectors are performance-critical.
  *
- *  Vectors 0xf0-0xfa are free (reserved for future Linux use).
+ *  Vectors 0xf0-0xf9 are free (reserved for future Linux use).
  */
 #define SPURIOUS_APIC_VECTOR	0xff
 #define ERROR_APIC_VECTOR	0xfe
 #define INVALIDATE_TLB_VECTOR	0xfd
 #define RESCHEDULE_VECTOR	0xfc
 #define CALL_FUNCTION_VECTOR	0xfb
+#define THRESHOLD_APIC_VECTOR	0xfa
 
 #define THERMAL_APIC_VECTOR	0xf0
 /*
Index: linux/arch/x86/kernel/apic_32.c
===================================================================
--- linux.orig/arch/x86/kernel/apic_32.c
+++ linux/arch/x86/kernel/apic_32.c
@@ -226,6 +226,30 @@ static void __setup_APIC_LVTT(unsigned i
 }
 
 /*
+ * Setup extended LVT, AMD specific (K8, family 10h)
+ *
+ * Vector mappings are hard coded. On K8 only offset 0 (APIC500) and
+ * MCE interrupts are supported. Thus MCE offset must be set to 0.
+ */
+
+#define APIC_EILVT_LVTOFF_MCE 0
+#define APIC_EILVT_LVTOFF_IBS 1
+
+static void setup_APIC_eilvt(u8 lvt_off, u8 vector, u8 msg_type, u8 mask)
+{
+	unsigned long reg = (lvt_off << 4) + APIC_EILVT0;
+	unsigned int  v   = (mask << 16) | (msg_type << 8) | vector;
+
+	apic_write(reg, v);
+}
+
+u8 setup_APIC_eilvt_mce(u8 vector, u8 msg_type, u8 mask)
+{
+	setup_APIC_eilvt(APIC_EILVT_LVTOFF_MCE, vector, msg_type, mask);
+	return APIC_EILVT_LVTOFF_MCE;
+}
+
+/*
  * Program the next event, relative to now
  */
 static int lapic_next_event(unsigned long delta,