1 files changed, 24 insertions, 12 deletions

diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 28f747d61d7..07cffc1214c 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -395,7 +395,7 @@ static void __setup_APIC_LVTT(unsigned int clocks, int oneshot, int irqen)
 
 static void setup_APIC_eilvt(u8 lvt_off, u8 vector, u8 msg_type, u8 mask)
 {
-	unsigned long reg = (lvt_off << 4) + APIC_EILVT0;
+	unsigned long reg = (lvt_off << 4) + APIC_EILVTn(0);
 	unsigned int  v   = (mask << 16) | (msg_type << 8) | vector;
 
 	apic_write(reg, v);
@@ -1456,7 +1456,6 @@ static int __init detect_init_APIC(void)
 	}
 
 	mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
-	boot_cpu_physical_apicid = 0;
 	return 0;
 }
 #else
@@ -1570,6 +1569,8 @@ void __init early_init_lapic_mapping(void)
  */
 void __init init_apic_mappings(void)
 {
+	unsigned int new_apicid;
+
 	if (x2apic_mode) {
 		boot_cpu_physical_apicid = read_apic_id();
 		return;
@@ -1586,21 +1587,32 @@ void __init init_apic_mappings(void)
 	} else
 		apic_phys = mp_lapic_addr;
 
-	set_fixmap_nocache(FIX_APIC_BASE, apic_phys);
-	apic_printk(APIC_VERBOSE, "mapped APIC to %08lx (%08lx)\n",
-				APIC_BASE, apic_phys);
-
 	/*
-	 * Fetch the APIC ID of the BSP in case we have a
-	 * default configuration (or the MP table is broken).
+	 * acpi lapic path already maps that address in
+	 * acpi_register_lapic_address()
 	 */
-	if (boot_cpu_physical_apicid == -1U)
-		boot_cpu_physical_apicid = read_apic_id();
+	if (!acpi_lapic)
+		set_fixmap_nocache(FIX_APIC_BASE, apic_phys);
+
+	apic_printk(APIC_VERBOSE, "mapped APIC to %08lx (%08lx)\n",
+			APIC_BASE, apic_phys);
 
-	/* lets check if we may to NOP'ify apic operations */
+	/* lets check if we may NOP'ify apic operations */
 	if (!cpu_has_apic) {
 		pr_info("APIC: disable apic facility\n");
 		apic_disable();
+		return;
+	}
+
+	/*
+	 * Fetch the APIC ID of the BSP in case we have a
+	 * default configuration (or the MP table is broken).
+	 */
+	new_apicid = read_apic_id();
+	if (boot_cpu_physical_apicid != new_apicid) {
+		boot_cpu_physical_apicid = new_apicid;
+		apic_version[new_apicid] =
+			 GET_APIC_VERSION(apic_read(APIC_LVR));
 	}
 }
 
@@ -2191,7 +2203,7 @@ static int __cpuinit set_multi(const struct dmi_system_id *d)
 {
 	if (multi)
 		return 0;
-	printk(KERN_INFO "APIC: %s detected, Multi Chassis\n", d->ident);
+	pr_info("APIC: %s detected, Multi Chassis\n", d->ident);
 	multi = 1;
 	return 0;
 }