Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86/apic updates from Thomas Gleixner:
 "This is a major overhaul to the x86 apic subsystem consisting of the
  following parts:

   - Remove obsolete APIC driver abstractions (David Rientjes)

   - Use the irqdomain facilities to dynamically allocate IRQs for
     IOAPICs.  This is a prerequisite to enable IOAPIC hotplug support,
     and it also frees up wasted vectors (Jiang Liu)

   - Misc fixlets.

  Despite the hickup in Ingos previous pull request - caused by the
  missing fixup for the suspend/resume issue reported by Borislav - I
  strongly recommend that this update finds its way into 3.17.  Some
  history for you:

  This is preparatory work for physical IOAPIC hotplug.  The first
  attempt to support this was done by Yinghai and I shot it down because
  it just added another layer of obscurity and complexity to the already
  existing mess without tackling the underlying shortcomings of the
  current implementation.

  After quite some on- and offlist discussions, I requested that the
  design of this functionality must use generic infrastructure, i.e.
  irq domains, which provide all the mechanisms to dynamically map linux
  interrupt numbers to physical interrupts.

  Jiang picked up the idea and did a great job of consolidating the
  existing interfaces to manage the x86 (IOAPIC) interrupt system by
  utilizing irq domains.

  The testing in tip, Linux-next and inside of Intel on various machines
  did not unearth any oddities until Borislav exposed it to one of his
  oddball machines.  The issue was resolved quickly, but unfortunately
  the fix fell through the cracks and did not hit the tip tree before
  Ingo sent the pull request.  Not entirely Ingos fault, I also assumed
  that the fix was already merged when Ingo asked me whether he could
  send it.

  Nevertheless this work has a proper design, has undergone several
  rounds of review and the final fallout after applying it to tip and
  integrating it into Linux-next has been more than moderate.  It's the
  ground work not only for IOAPIC hotplug, it will also allow us to move
  the lowlevel vector allocation into the irqdomain hierarchy, which
  will benefit other architectures as well.  Patches are posted already,
  but they are on hold for two weeks, see below.

  I really appreciate the competence and responsiveness Jiang has shown
  in course of this endavour.  So I'm sure that any fallout of this will
  be addressed in a timely manner.

  FYI, I'm vanishing for 2 weeks into my annual kids summer camp kitchen
  duty^Wvacation, while you folks are drooling at KS/LinuxCon :) But HPA
  will have a look at the hopefully zero fallout until I'm back"

* 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (53 commits)
  x86, irq, PCI: Keep IRQ assignment for PCI devices during suspend/hibernation
  x86/apic/vsmp: Make is_vsmp_box() static
  x86, apic: Remove enable_apic_mode callback
  x86, apic: Remove setup_portio_remap callback
  x86, apic: Remove multi_timer_check callback
  x86, apic: Replace noop_check_apicid_used
  x86, apic: Remove check_apicid_present callback
  x86, apic: Remove mps_oem_check callback
  x86, apic: Remove smp_callin_clear_local_apic callback
  x86, apic: Replace trampoline physical addresses with defaults
  x86, apic: Remove x86_32_numa_cpu_node callback
  x86: intel-mid: Use the new io_apic interfaces
  x86, vsmp: Remove is_vsmp_box() from apic_is_clustered_box()
  x86, irq: Clean up irqdomain transition code
  x86, irq, devicetree: Release IOAPIC pin when PCI device is disabled
  x86, irq, SFI: Release IOAPIC pin when PCI device is disabled
  x86, irq, mpparse: Release IOAPIC pin when PCI device is disabled
  x86, irq, ACPI: Release IOAPIC pin when PCI device is disabled
  x86, irq: Introduce helper functions to release IOAPIC pin
  x86, irq: Simplify the way to handle ISA IRQ
  ...

16 files changed, 784 insertions, 910 deletions

diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index a531f6564ed..b436fc735aa 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -31,6 +31,7 @@
 #include <linux/module.h>
 #include <linux/dmi.h>
 #include <linux/irq.h>
+#include <linux/irqdomain.h>
 #include <linux/slab.h>
 #include <linux/bootmem.h>
 #include <linux/ioport.h>
@@ -43,6 +44,7 @@
 #include <asm/io.h>
 #include <asm/mpspec.h>
 #include <asm/smp.h>
+#include <asm/i8259.h>
 
 #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */
 static int __initdata acpi_force = 0;
@@ -93,44 +95,7 @@ static u32 isa_irq_to_gsi[NR_IRQS_LEGACY] __read_mostly = {
 	0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
 };
 
-static unsigned int gsi_to_irq(unsigned int gsi)
-{
-	unsigned int irq = gsi + NR_IRQS_LEGACY;
-	unsigned int i;
-
-	for (i = 0; i < NR_IRQS_LEGACY; i++) {
-		if (isa_irq_to_gsi[i] == gsi) {
-			return i;
-		}
-	}
-
-	/* Provide an identity mapping of gsi == irq
-	 * except on truly weird platforms that have
-	 * non isa irqs in the first 16 gsis.
-	 */
-	if (gsi >= NR_IRQS_LEGACY)
-		irq = gsi;
-	else
-		irq = gsi_top + gsi;
-
-	return irq;
-}
-
-static u32 irq_to_gsi(int irq)
-{
-	unsigned int gsi;
-
-	if (irq < NR_IRQS_LEGACY)
-		gsi = isa_irq_to_gsi[irq];
-	else if (irq < gsi_top)
-		gsi = irq;
-	else if (irq < (gsi_top + NR_IRQS_LEGACY))
-		gsi = irq - gsi_top;
-	else
-		gsi = 0xffffffff;
-
-	return gsi;
-}
+#define	ACPI_INVALID_GSI		INT_MIN
 
 /*
  * This is just a simple wrapper around early_ioremap(),
@@ -341,11 +306,145 @@ acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long e
 #endif				/*CONFIG_X86_LOCAL_APIC */
 
 #ifdef CONFIG_X86_IO_APIC
+#define MP_ISA_BUS		0
+
+static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
+					  u32 gsi)
+{
+	int ioapic;
+	int pin;
+	struct mpc_intsrc mp_irq;
+
+	/*
+	 * Convert 'gsi' to 'ioapic.pin'.
+	 */
+	ioapic = mp_find_ioapic(gsi);
+	if (ioapic < 0)
+		return;
+	pin = mp_find_ioapic_pin(ioapic, gsi);
+
+	/*
+	 * TBD: This check is for faulty timer entries, where the override
+	 *      erroneously sets the trigger to level, resulting in a HUGE
+	 *      increase of timer interrupts!
+	 */
+	if ((bus_irq == 0) && (trigger == 3))
+		trigger = 1;
+
+	mp_irq.type = MP_INTSRC;
+	mp_irq.irqtype = mp_INT;
+	mp_irq.irqflag = (trigger << 2) | polarity;
+	mp_irq.srcbus = MP_ISA_BUS;
+	mp_irq.srcbusirq = bus_irq;	/* IRQ */
+	mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
+	mp_irq.dstirq = pin;	/* INTIN# */
+
+	mp_save_irq(&mp_irq);
+
+	/*
+	 * Reset default identity mapping if gsi is also an legacy IRQ,
+	 * otherwise there will be more than one entry with the same GSI
+	 * and acpi_isa_irq_to_gsi() may give wrong result.
+	 */
+	if (gsi < nr_legacy_irqs() && isa_irq_to_gsi[gsi] == gsi)
+		isa_irq_to_gsi[gsi] = ACPI_INVALID_GSI;
+	isa_irq_to_gsi[bus_irq] = gsi;
+}
+
+static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
+			int polarity)
+{
+#ifdef CONFIG_X86_MPPARSE
+	struct mpc_intsrc mp_irq;
+	struct pci_dev *pdev;
+	unsigned char number;
+	unsigned int devfn;
+	int ioapic;
+	u8 pin;
+
+	if (!acpi_ioapic)
+		return 0;
+	if (!dev || !dev_is_pci(dev))
+		return 0;
+
+	pdev = to_pci_dev(dev);
+	number = pdev->bus->number;
+	devfn = pdev->devfn;
+	pin = pdev->pin;
+	/* print the entry should happen on mptable identically */
+	mp_irq.type = MP_INTSRC;
+	mp_irq.irqtype = mp_INT;
+	mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
+				(polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
+	mp_irq.srcbus = number;
+	mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
+	ioapic = mp_find_ioapic(gsi);
+	mp_irq.dstapic = mpc_ioapic_id(ioapic);
+	mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
+
+	mp_save_irq(&mp_irq);
+#endif
+	return 0;
+}
+
+static int mp_register_gsi(struct device *dev, u32 gsi, int trigger,
+			   int polarity)
+{
+	int irq, node;
+
+	if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
+		return gsi;
+
+	/* Don't set up the ACPI SCI because it's already set up */
+	if (acpi_gbl_FADT.sci_interrupt == gsi)
+		return gsi;
+
+	trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1;
+	polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1;
+	node = dev ? dev_to_node(dev) : NUMA_NO_NODE;
+	if (mp_set_gsi_attr(gsi, trigger, polarity, node)) {
+		pr_warn("Failed to set pin attr for GSI%d\n", gsi);
+		return -1;
+	}
+
+	irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC);
+	if (irq < 0)
+		return irq;
+
+	if (enable_update_mptable)
+		mp_config_acpi_gsi(dev, gsi, trigger, polarity);
+
+	return irq;
+}
+
+static void mp_unregister_gsi(u32 gsi)
+{
+	int irq;
+
+	if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
+		return;
+
+	if (acpi_gbl_FADT.sci_interrupt == gsi)
+		return;
+
+	irq = mp_map_gsi_to_irq(gsi, 0);
+	if (irq > 0)
+		mp_unmap_irq(irq);
+}
+
+static struct irq_domain_ops acpi_irqdomain_ops = {
+	.map = mp_irqdomain_map,
+	.unmap = mp_irqdomain_unmap,
+};
 
 static int __init
 acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
 {
 	struct acpi_madt_io_apic *ioapic = NULL;
+	struct ioapic_domain_cfg cfg = {
+		.type = IOAPIC_DOMAIN_DYNAMIC,
+		.ops = &acpi_irqdomain_ops,
+	};
 
 	ioapic = (struct acpi_madt_io_apic *)header;
 
@@ -354,8 +453,12 @@ acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
 
 	acpi_table_print_madt_entry(header);
 
-	mp_register_ioapic(ioapic->id,
-			   ioapic->address, ioapic->global_irq_base);
+	/* Statically assign IRQ numbers for IOAPICs hosting legacy IRQs */
+	if (ioapic->global_irq_base < nr_legacy_irqs())
+		cfg.type = IOAPIC_DOMAIN_LEGACY;
+
+	mp_register_ioapic(ioapic->id, ioapic->address, ioapic->global_irq_base,
+			   &cfg);
 
 	return 0;
 }
@@ -378,11 +481,6 @@ static void __init acpi_sci_ioapic_setup(u8 bus_irq, u16 polarity, u16 trigger,
 	if (acpi_sci_flags & ACPI_MADT_POLARITY_MASK)
 		polarity = acpi_sci_flags & ACPI_MADT_POLARITY_MASK;
 
-	/*
-	 * mp_config_acpi_legacy_irqs() already setup IRQs < 16
-	 * If GSI is < 16, this will update its flags,
-	 * else it will create a new mp_irqs[] entry.
-	 */
 	mp_override_legacy_irq(bus_irq, polarity, trigger, gsi);
 
 	/*
@@ -504,25 +602,28 @@ void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
 	outb(new >> 8, 0x4d1);
 }
 
-int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
+int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
 {
-	*irq = gsi_to_irq(gsi);
+	int irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC | IOAPIC_MAP_CHECK);
 
-#ifdef CONFIG_X86_IO_APIC
-	if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC)
-		setup_IO_APIC_irq_extra(gsi);
-#endif
+	if (irq >= 0) {
+		*irqp = irq;
+		return 0;
+	}
 
-	return 0;
+	return -1;
 }
 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
 
 int acpi_isa_irq_to_gsi(unsigned isa_irq, u32 *gsi)
 {
-	if (isa_irq >= 16)
-		return -1;
-	*gsi = irq_to_gsi(isa_irq);
-	return 0;
+	if (isa_irq < nr_legacy_irqs() &&
+	    isa_irq_to_gsi[isa_irq] != ACPI_INVALID_GSI) {
+		*gsi = isa_irq_to_gsi[isa_irq];
+		return 0;
+	}
+
+	return -1;
 }
 
 static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
@@ -542,15 +643,25 @@ static int acpi_register_gsi_pic(struct device *dev, u32 gsi,
 static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi,
 				    int trigger, int polarity)
 {
+	int irq = gsi;
+
 #ifdef CONFIG_X86_IO_APIC
-	gsi = mp_register_gsi(dev, gsi, trigger, polarity);
+	irq = mp_register_gsi(dev, gsi, trigger, polarity);
 #endif
 
-	return gsi;
+	return irq;
+}
+
+static void acpi_unregister_gsi_ioapic(u32 gsi)
+{
+#ifdef CONFIG_X86_IO_APIC
+	mp_unregister_gsi(gsi);
+#endif
 }
 
 int (*__acpi_register_gsi)(struct device *dev, u32 gsi,
 			   int trigger, int polarity) = acpi_register_gsi_pic;
+void (*__acpi_unregister_gsi)(u32 gsi) = NULL;
 
 #ifdef CONFIG_ACPI_SLEEP
 int (*acpi_suspend_lowlevel)(void) = x86_acpi_suspend_lowlevel;
@@ -564,32 +675,22 @@ int (*acpi_suspend_lowlevel)(void);
  */
 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
 {
-	unsigned int irq;
-	unsigned int plat_gsi = gsi;
-
-	plat_gsi = (*__acpi_register_gsi)(dev, gsi, trigger, polarity);
-	irq = gsi_to_irq(plat_gsi);
-
-	return irq;
+	return __acpi_register_gsi(dev, gsi, trigger, polarity);
 }
 EXPORT_SYMBOL_GPL(acpi_register_gsi);
 
 void acpi_unregister_gsi(u32 gsi)
 {
+	if (__acpi_unregister_gsi)
+		__acpi_unregister_gsi(gsi);
 }
 EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
 
-void __init acpi_set_irq_model_pic(void)
-{
-	acpi_irq_model = ACPI_IRQ_MODEL_PIC;
-	__acpi_register_gsi = acpi_register_gsi_pic;
-	acpi_ioapic = 0;
-}
-
-void __init acpi_set_irq_model_ioapic(void)
+static void __init acpi_set_irq_model_ioapic(void)
 {
 	acpi_irq_model = ACPI_IRQ_MODEL_IOAPIC;
 	__acpi_register_gsi = acpi_register_gsi_ioapic;
+	__acpi_unregister_gsi = acpi_unregister_gsi_ioapic;
 	acpi_ioapic = 1;
 }
 
@@ -825,9 +926,8 @@ static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
 	 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 	 */
 
-	count =
-	    acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
-				  acpi_parse_lapic_addr_ovr, 0);
+	count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
+				      acpi_parse_lapic_addr_ovr, 0);
 	if (count < 0) {
 		printk(KERN_ERR PREFIX
 		       "Error parsing LAPIC address override entry\n");
@@ -852,9 +952,8 @@ static int __init acpi_parse_madt_lapic_entries(void)
 	 * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value).
 	 */
 
-	count =
-	    acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
-				  acpi_parse_lapic_addr_ovr, 0);
+	count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE,
+				      acpi_parse_lapic_addr_ovr, 0);
 	if (count < 0) {
 		printk(KERN_ERR PREFIX
 		       "Error parsing LAPIC address override entry\n");
@@ -882,11 +981,10 @@ static int __init acpi_parse_madt_lapic_entries(void)
 		return count;
 	}
 
-	x2count =
-	    acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
-				  acpi_parse_x2apic_nmi, 0);
-	count =
-	    acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI, acpi_parse_lapic_nmi, 0);
+	x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
+					acpi_parse_x2apic_nmi, 0);
+	count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
+				      acpi_parse_lapic_nmi, 0);
 	if (count < 0 || x2count < 0) {
 		printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
 		/* TBD: Cleanup to allow fallback to MPS */
@@ -897,44 +995,7 @@ static int __init acpi_parse_madt_lapic_entries(void)
 #endif				/* CONFIG_X86_LOCAL_APIC */
 
 #ifdef	CONFIG_X86_IO_APIC
-#define MP_ISA_BUS		0
-
-void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
-{
-	int ioapic;
-	int pin;
-	struct mpc_intsrc mp_irq;
-
-	/*
-	 * Convert 'gsi' to 'ioapic.pin'.
-	 */
-	ioapic = mp_find_ioapic(gsi);
-	if (ioapic < 0)
-		return;
-	pin = mp_find_ioapic_pin(ioapic, gsi);
-
-	/*
-	 * TBD: This check is for faulty timer entries, where the override
-	 *      erroneously sets the trigger to level, resulting in a HUGE
-	 *      increase of timer interrupts!
-	 */
-	if ((bus_irq == 0) && (trigger == 3))
-		trigger = 1;
-
-	mp_irq.type = MP_INTSRC;
-	mp_irq.irqtype = mp_INT;
-	mp_irq.irqflag = (trigger << 2) | polarity;
-	mp_irq.srcbus = MP_ISA_BUS;
-	mp_irq.srcbusirq = bus_irq;	/* IRQ */
-	mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
-	mp_irq.dstirq = pin;	/* INTIN# */
-
-	mp_save_irq(&mp_irq);
-
-	isa_irq_to_gsi[bus_irq] = gsi;
-}
-
-void __init mp_config_acpi_legacy_irqs(void)
+static void __init mp_config_acpi_legacy_irqs(void)
 {
 	int i;
 	struct mpc_intsrc mp_irq;
@@ -952,7 +1013,7 @@ void __init mp_config_acpi_legacy_irqs(void)
 	 * Use the default configuration for the IRQs 0-15.  Unless
 	 * overridden by (MADT) interrupt source override entries.
 	 */
-	for (i = 0; i < 16; i++) {
+	for (i = 0; i < nr_legacy_irqs(); i++) {
 		int ioapic, pin;
 		unsigned int dstapic;
 		int idx;
@@ -1000,84 +1061,6 @@ void __init mp_config_acpi_legacy_irqs(void)
 	}
 }
 
-static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
-			int polarity)
-{
-#ifdef CONFIG_X86_MPPARSE
-	struct mpc_intsrc mp_irq;
-	struct pci_dev *pdev;
-	unsigned char number;
-	unsigned int devfn;
-	int ioapic;
-	u8 pin;
-
-	if (!acpi_ioapic)
-		return 0;
-	if (!dev || !dev_is_pci(dev))
-		return 0;
-
-	pdev = to_pci_dev(dev);
-	number = pdev->bus->number;
-	devfn = pdev->devfn;
-	pin = pdev->pin;
-	/* print the entry should happen on mptable identically */
-	mp_irq.type = MP_INTSRC;
-	mp_irq.irqtype = mp_INT;
-	mp_irq.irqflag = (trigger == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
-				(polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
-	mp_irq.srcbus = number;
-	mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
-	ioapic = mp_find_ioapic(gsi);
-	mp_irq.dstapic = mpc_ioapic_id(ioapic);
-	mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
-
-	mp_save_irq(&mp_irq);
-#endif
-	return 0;
-}
-
-int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
-{
-	int ioapic;
-	int ioapic_pin;
-	struct io_apic_irq_attr irq_attr;
-	int ret;
-
-	if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
-		return gsi;
-
-	/* Don't set up the ACPI SCI because it's already set up */
-	if (acpi_gbl_FADT.sci_interrupt == gsi)
-		return gsi;
-
-	ioapic = mp_find_ioapic(gsi);
-	if (ioapic < 0) {
-		printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
-		return gsi;
-	}
-
-	ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
-
-	if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
-		printk(KERN_ERR "Invalid reference to IOAPIC pin "
-		       "%d-%d\n", mpc_ioapic_id(ioapic),
-		       ioapic_pin);
-		return gsi;
-	}
-
-	if (enable_update_mptable)
-		mp_config_acpi_gsi(dev, gsi, trigger, polarity);
-
-	set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
-			     trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
-			     polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
-	ret = io_apic_set_pci_routing(dev, gsi_to_irq(gsi), &irq_attr);
-	if (ret < 0)
-		gsi = INT_MIN;
-
-	return gsi;
-}
-
 /*
  * Parse IOAPIC related entries in MADT
  * returns 0 on success, < 0 on error
@@ -1107,9 +1090,8 @@ static int __init acpi_parse_madt_ioapic_entries(void)
 		return -ENODEV;
 	}
 
-	count =
-	    acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
-				  MAX_IO_APICS);
+	count = acpi_table_parse_madt(ACPI_MADT_TYPE_IO_APIC, acpi_parse_ioapic,
+				      MAX_IO_APICS);
 	if (!count) {
 		printk(KERN_ERR PREFIX "No IOAPIC entries present\n");
 		return -ENODEV;
@@ -1118,9 +1100,8 @@ static int __init acpi_parse_madt_ioapic_entries(void)
 		return count;
 	}
 
-	count =
-	    acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_parse_int_src_ovr,
-				  nr_irqs);
+	count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
+				      acpi_parse_int_src_ovr, nr_irqs);
 	if (count < 0) {
 		printk(KERN_ERR PREFIX
 		       "Error parsing interrupt source overrides entry\n");
@@ -1139,9 +1120,8 @@ static int __init acpi_parse_madt_ioapic_entries(void)
 	/* Fill in identity legacy mappings where no override */
 	mp_config_acpi_legacy_irqs();
 
-	count =
-	    acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_parse_nmi_src,
-				  nr_irqs);
+	count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
+				      acpi_parse_nmi_src, nr_irqs);
 	if (count < 0) {
 		printk(KERN_ERR PREFIX "Error parsing NMI SRC entry\n");
 		/* TBD: Cleanup to allow fallback to MPS */
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index ad28db7e6bd..67760275544 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -67,7 +67,7 @@ EXPORT_SYMBOL_GPL(boot_cpu_physical_apicid);
 /*
  * The highest APIC ID seen during enumeration.
  */
-unsigned int max_physical_apicid;
+static unsigned int max_physical_apicid;
 
 /*
  * Bitmask of physically existing CPUs:
@@ -1342,17 +1342,6 @@ void setup_local_APIC(void)
 	/* always use the value from LDR */
 	early_per_cpu(x86_cpu_to_logical_apicid, cpu) =
 		logical_smp_processor_id();
-
-	/*
-	 * Some NUMA implementations (NUMAQ) don't initialize apicid to
-	 * node mapping during NUMA init.  Now that logical apicid is
-	 * guaranteed to be known, give it another chance.  This is already
-	 * a bit too late - percpu allocation has already happened without
-	 * proper NUMA affinity.
-	 */
-	if (apic->x86_32_numa_cpu_node)
-		set_apicid_to_node(early_per_cpu(x86_cpu_to_apicid, cpu),
-				   apic->x86_32_numa_cpu_node(cpu));
 #endif
 
 	/*
@@ -2053,8 +2042,6 @@ void __init connect_bsp_APIC(void)
 		imcr_pic_to_apic();
 	}
 #endif
-	if (apic->enable_apic_mode)
-		apic->enable_apic_mode();
 }
 
 /**
@@ -2451,51 +2438,6 @@ static void apic_pm_activate(void) { }
 
 #ifdef CONFIG_X86_64
 
-static int apic_cluster_num(void)
-{
-	int i, clusters, zeros;
-	unsigned id;
-	u16 *bios_cpu_apicid;
-	DECLARE_BITMAP(clustermap, NUM_APIC_CLUSTERS);
-
-	bios_cpu_apicid = early_per_cpu_ptr(x86_bios_cpu_apicid);
-	bitmap_zero(clustermap, NUM_APIC_CLUSTERS);
-
-	for (i = 0; i < nr_cpu_ids; i++) {
-		/* are we being called early in kernel startup? */
-		if (bios_cpu_apicid) {
-			id = bios_cpu_apicid[i];
-		} else if (i < nr_cpu_ids) {
-			if (cpu_present(i))
-				id = per_cpu(x86_bios_cpu_apicid, i);
-			else
-				continue;
-		} else
-			break;
-
-		if (id != BAD_APICID)
-			__set_bit(APIC_CLUSTERID(id), clustermap);
-	}
-
-	/* Problem:  Partially populated chassis may not have CPUs in some of
-	 * the APIC clusters they have been allocated.  Only present CPUs have
-	 * x86_bios_cpu_apicid entries, thus causing zeroes in the bitmap.
-	 * Since clusters are allocated sequentially, count zeros only if
-	 * they are bounded by ones.
-	 */
-	clusters = 0;
-	zeros = 0;
-	for (i = 0; i < NUM_APIC_CLUSTERS; i++) {
-		if (test_bit(i, clustermap)) {
-			clusters += 1 + zeros;
-			zeros = 0;
-		} else
-			++zeros;
-	}
-
-	return clusters;
-}
-
 static int multi_checked;
 static int multi;
 
@@ -2540,20 +2482,7 @@ static void dmi_check_multi(void)
 int apic_is_clustered_box(void)
 {
 	dmi_check_multi();
-	if (multi)
-		return 1;
-
-	if (!is_vsmp_box())
-		return 0;
-
-	/*
-	 * ScaleMP vSMPowered boxes have one cluster per board and TSCs are
-	 * not guaranteed to be synced between boards
-	 */
-	if (apic_cluster_num() > 1)
-		return 1;
-
-	return 0;
+	return multi;
 }
 #endif
 
diff --git a/arch/x86/kernel/apic/apic_flat_64.c b/arch/x86/kernel/apic/apic_flat_64.c
index 7c1b2947951..de918c410ea 100644
--- a/arch/x86/kernel/apic/apic_flat_64.c
+++ b/arch/x86/kernel/apic/apic_flat_64.c
@@ -168,21 +168,16 @@ static struct apic apic_flat =  {
 	.disable_esr			= 0,
 	.dest_logical			= APIC_DEST_LOGICAL,
 	.check_apicid_used		= NULL,
-	.check_apicid_present		= NULL,
 
 	.vector_allocation_domain	= flat_vector_allocation_domain,
 	.init_apic_ldr			= flat_init_apic_ldr,
 
 	.ioapic_phys_id_map		= NULL,
 	.setup_apic_routing		= NULL,
-	.multi_timer_check		= NULL,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.apicid_to_cpu_present		= NULL,
-	.setup_portio_remap		= NULL,
 	.check_phys_apicid_present	= default_check_phys_apicid_present,
-	.enable_apic_mode		= NULL,
 	.phys_pkg_id			= flat_phys_pkg_id,
-	.mps_oem_check			= NULL,
 
 	.get_apic_id			= flat_get_apic_id,
 	.set_apic_id			= set_apic_id,
@@ -196,10 +191,7 @@ static struct apic apic_flat =  {
 	.send_IPI_all			= flat_send_IPI_all,
 	.send_IPI_self			= apic_send_IPI_self,
 
-	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
-	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
 	.wait_for_init_deassert		= false,
-	.smp_callin_clear_local_apic	= NULL,
 	.inquire_remote_apic		= default_inquire_remote_apic,
 
 	.read				= native_apic_mem_read,
@@ -283,7 +275,6 @@ static struct apic apic_physflat =  {
 	.disable_esr			= 0,
 	.dest_logical			= 0,
 	.check_apicid_used		= NULL,
-	.check_apicid_present		= NULL,
 
 	.vector_allocation_domain	= default_vector_allocation_domain,
 	/* not needed, but shouldn't hurt: */
@@ -291,14 +282,10 @@ static struct apic apic_physflat =  {
 
 	.ioapic_phys_id_map		= NULL,
 	.setup_apic_routing		= NULL,
-	.multi_timer_check		= NULL,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.apicid_to_cpu_present		= NULL,
-	.setup_portio_remap		= NULL,
 	.check_phys_apicid_present	= default_check_phys_apicid_present,
-	.enable_apic_mode		= NULL,
 	.phys_pkg_id			= flat_phys_pkg_id,
-	.mps_oem_check			= NULL,
 
 	.get_apic_id			= flat_get_apic_id,
 	.set_apic_id			= set_apic_id,
@@ -312,10 +299,7 @@ static struct apic apic_physflat =  {
 	.send_IPI_all			= physflat_send_IPI_all,
 	.send_IPI_self			= apic_send_IPI_self,
 
-	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
-	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
 	.wait_for_init_deassert		= false,
-	.smp_callin_clear_local_apic	= NULL,
 	.inquire_remote_apic		= default_inquire_remote_apic,
 
 	.read				= native_apic_mem_read,
diff --git a/arch/x86/kernel/apic/apic_noop.c b/arch/x86/kernel/apic/apic_noop.c
index 8c7c98249c2..b205cdbdbe6 100644
--- a/arch/x86/kernel/apic/apic_noop.c
+++ b/arch/x86/kernel/apic/apic_noop.c
@@ -89,16 +89,6 @@ static const struct cpumask *noop_target_cpus(void)
 	return cpumask_of(0);
 }
 
-static unsigned long noop_check_apicid_used(physid_mask_t *map, int apicid)
-{
-	return physid_isset(apicid, *map);
-}
-
-static unsigned long noop_check_apicid_present(int bit)
-{
-	return physid_isset(bit, phys_cpu_present_map);
-}
-
 static void noop_vector_allocation_domain(int cpu, struct cpumask *retmask,
 					  const struct cpumask *mask)
 {
@@ -133,27 +123,21 @@ struct apic apic_noop = {
 	.target_cpus			= noop_target_cpus,
 	.disable_esr			= 0,
 	.dest_logical			= APIC_DEST_LOGICAL,
-	.check_apicid_used		= noop_check_apicid_used,
-	.check_apicid_present		= noop_check_apicid_present,
+	.check_apicid_used		= default_check_apicid_used,
 
 	.vector_allocation_domain	= noop_vector_allocation_domain,
 	.init_apic_ldr			= noop_init_apic_ldr,
 
 	.ioapic_phys_id_map		= default_ioapic_phys_id_map,
 	.setup_apic_routing		= NULL,
-	.multi_timer_check		= NULL,
 
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.apicid_to_cpu_present		= physid_set_mask_of_physid,
 
-	.setup_portio_remap		= NULL,
 	.check_phys_apicid_present	= default_check_phys_apicid_present,
-	.enable_apic_mode		= NULL,
 
 	.phys_pkg_id			= noop_phys_pkg_id,
 
-	.mps_oem_check			= NULL,
-
 	.get_apic_id			= noop_get_apic_id,
 	.set_apic_id			= NULL,
 	.apic_id_mask			= 0x0F << 24,
@@ -168,12 +152,7 @@ struct apic apic_noop = {
 
 	.wakeup_secondary_cpu		= noop_wakeup_secondary_cpu,
 
-	/* should be safe */
-	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
-	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
-
 	.wait_for_init_deassert		= false,
-	.smp_callin_clear_local_apic	= NULL,
 	.inquire_remote_apic		= NULL,
 
 	.read				= noop_apic_read,
diff --git a/arch/x86/kernel/apic/apic_numachip.c b/arch/x86/kernel/apic/apic_numachip.c
index a5b45df8bc8..ae915391ebe 100644
--- a/arch/x86/kernel/apic/apic_numachip.c
+++ b/arch/x86/kernel/apic/apic_numachip.c
@@ -217,21 +217,16 @@ static const struct apic apic_numachip __refconst = {
 	.disable_esr			= 0,
 	.dest_logical			= 0,
 	.check_apicid_used		= NULL,
-	.check_apicid_present		= NULL,
 
 	.vector_allocation_domain	= default_vector_allocation_domain,
 	.init_apic_ldr			= flat_init_apic_ldr,
 
 	.ioapic_phys_id_map		= NULL,
 	.setup_apic_routing		= NULL,
-	.multi_timer_check		= NULL,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.apicid_to_cpu_present		= NULL,
-	.setup_portio_remap		= NULL,
 	.check_phys_apicid_present	= default_check_phys_apicid_present,
-	.enable_apic_mode		= NULL,
 	.phys_pkg_id			= numachip_phys_pkg_id,
-	.mps_oem_check			= NULL,
 
 	.get_apic_id			= get_apic_id,
 	.set_apic_id			= set_apic_id,
@@ -246,10 +241,7 @@ static const struct apic apic_numachip __refconst = {
 	.send_IPI_self			= numachip_send_IPI_self,
 
 	.wakeup_secondary_cpu		= numachip_wakeup_secondary,
-	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
-	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
 	.wait_for_init_deassert		= false,
-	.smp_callin_clear_local_apic	= NULL,
 	.inquire_remote_apic		= NULL, /* REMRD not supported */
 
 	.read				= native_apic_mem_read,
diff --git a/arch/x86/kernel/apic/bigsmp_32.c b/arch/x86/kernel/apic/bigsmp_32.c
index e4840aa7a25..c4a8d63f822 100644
--- a/arch/x86/kernel/apic/bigsmp_32.c
+++ b/arch/x86/kernel/apic/bigsmp_32.c
@@ -31,11 +31,6 @@ static unsigned long bigsmp_check_apicid_used(physid_mask_t *map, int apicid)
 	return 0;
 }
 
-static unsigned long bigsmp_check_apicid_present(int bit)
-{
-	return 1;
-}
-
 static int bigsmp_early_logical_apicid(int cpu)
 {
 	/* on bigsmp, logical apicid is the same as physical */
@@ -168,21 +163,16 @@ static struct apic apic_bigsmp = {
 	.disable_esr			= 1,
 	.dest_logical			= 0,
 	.check_apicid_used		= bigsmp_check_apicid_used,
-	.check_apicid_present		= bigsmp_check_apicid_present,
 
 	.vector_allocation_domain	= default_vector_allocation_domain,
 	.init_apic_ldr			= bigsmp_init_apic_ldr,
 
 	.ioapic_phys_id_map		= bigsmp_ioapic_phys_id_map,
 	.setup_apic_routing		= bigsmp_setup_apic_routing,
-	.multi_timer_check		= NULL,
 	.cpu_present_to_apicid		= bigsmp_cpu_present_to_apicid,
 	.apicid_to_cpu_present		= physid_set_mask_of_physid,
-	.setup_portio_remap		= NULL,
 	.check_phys_apicid_present	= bigsmp_check_phys_apicid_present,
-	.enable_apic_mode		= NULL,
 	.phys_pkg_id			= bigsmp_phys_pkg_id,
-	.mps_oem_check			= NULL,
 
 	.get_apic_id			= bigsmp_get_apic_id,
 	.set_apic_id			= NULL,
@@ -196,11 +186,7 @@ static struct apic apic_bigsmp = {
 	.send_IPI_all			= bigsmp_send_IPI_all,
 	.send_IPI_self			= default_send_IPI_self,
 
-	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
-	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
-
 	.wait_for_init_deassert		= true,
-	.smp_callin_clear_local_apic	= NULL,
 	.inquire_remote_apic		= default_inquire_remote_apic,
 
 	.read				= native_apic_mem_read,
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 81e08eff05e..29290f554e7 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -31,6 +31,7 @@
 #include <linux/acpi.h>
 #include <linux/module.h>
 #include <linux/syscore_ops.h>
+#include <linux/irqdomain.h>
 #include <linux/msi.h>
 #include <linux/htirq.h>
 #include <linux/freezer.h>
@@ -62,6 +63,16 @@
 
 #define __apicdebuginit(type) static type __init
 
+#define	for_each_ioapic(idx)		\
+	for ((idx) = 0; (idx) < nr_ioapics; (idx)++)
+#define	for_each_ioapic_reverse(idx)	\
+	for ((idx) = nr_ioapics - 1; (idx) >= 0; (idx)--)
+#define	for_each_pin(idx, pin)		\
+	for ((pin) = 0; (pin) < ioapics[(idx)].nr_registers; (pin)++)
+#define	for_each_ioapic_pin(idx, pin)	\
+	for_each_ioapic((idx))		\
+		for_each_pin((idx), (pin))
+
 #define for_each_irq_pin(entry, head) \
 	for (entry = head; entry; entry = entry->next)
 
@@ -73,6 +84,17 @@ int sis_apic_bug = -1;
 
 static DEFINE_RAW_SPINLOCK(ioapic_lock);
 static DEFINE_RAW_SPINLOCK(vector_lock);
+static DEFINE_MUTEX(ioapic_mutex);
+static unsigned int ioapic_dynirq_base;
+static int ioapic_initialized;
+
+struct mp_pin_info {
+	int trigger;
+	int polarity;
+	int node;
+	int set;
+	u32 count;
+};
 
 static struct ioapic {
 	/*
@@ -87,7 +109,9 @@ static struct ioapic {
 	struct mpc_ioapic mp_config;
 	/* IO APIC gsi routing info */
 	struct mp_ioapic_gsi  gsi_config;
-	DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
+	struct ioapic_domain_cfg irqdomain_cfg;
+	struct irq_domain *irqdomain;
+	struct mp_pin_info *pin_info;
 } ioapics[MAX_IO_APICS];
 
 #define mpc_ioapic_ver(ioapic_idx)	ioapics[ioapic_idx].mp_config.apicver
@@ -107,6 +131,41 @@ struct mp_ioapic_gsi *mp_ioapic_gsi_routing(int ioapic_idx)
 	return &ioapics[ioapic_idx].gsi_config;
 }
 
+static inline int mp_ioapic_pin_count(int ioapic)
+{
+	struct mp_ioapic_gsi *gsi_cfg = mp_ioapic_gsi_routing(ioapic);
+
+	return gsi_cfg->gsi_end - gsi_cfg->gsi_base + 1;
+}
+
+u32 mp_pin_to_gsi(int ioapic, int pin)
+{
+	return mp_ioapic_gsi_routing(ioapic)->gsi_base + pin;
+}
+
+/*
+ * Initialize all legacy IRQs and all pins on the first IOAPIC
+ * if we have legacy interrupt controller. Kernel boot option "pirq="
+ * may rely on non-legacy pins on the first IOAPIC.
+ */
+static inline int mp_init_irq_at_boot(int ioapic, int irq)
+{
+	if (!nr_legacy_irqs())
+		return 0;
+
+	return ioapic == 0 || (irq >= 0 && irq < nr_legacy_irqs());
+}
+
+static inline struct mp_pin_info *mp_pin_info(int ioapic_idx, int pin)
+{
+	return ioapics[ioapic_idx].pin_info + pin;
+}
+
+static inline struct irq_domain *mp_ioapic_irqdomain(int ioapic)
+{
+	return ioapics[ioapic].irqdomain;
+}
+
 int nr_ioapics;
 
 /* The one past the highest gsi number used */
@@ -118,9 +177,6 @@ struct mpc_intsrc mp_irqs[MAX_IRQ_SOURCES];
 /* # of MP IRQ source entries */
 int mp_irq_entries;
 
-/* GSI interrupts */
-static int nr_irqs_gsi = NR_IRQS_LEGACY;
-
 #ifdef CONFIG_EISA
 int mp_bus_id_to_type[MAX_MP_BUSSES];
 #endif
@@ -149,8 +205,7 @@ static int __init parse_noapic(char *str)
 }
 early_param("noapic", parse_noapic);
 
-static int io_apic_setup_irq_pin(unsigned int irq, int node,
-				 struct io_apic_irq_attr *attr);
+static struct irq_cfg *alloc_irq_and_cfg_at(unsigned int at, int node);
 
 /* Will be called in mpparse/acpi/sfi codes for saving IRQ info */
 void mp_save_irq(struct mpc_intsrc *m)
@@ -182,19 +237,15 @@ static struct irq_pin_list *alloc_irq_pin_list(int node)
 	return kzalloc_node(sizeof(struct irq_pin_list), GFP_KERNEL, node);
 }
 
-
-/* irq_cfg is indexed by the sum of all RTEs in all I/O APICs. */
-static struct irq_cfg irq_cfgx[NR_IRQS_LEGACY];
-
 int __init arch_early_irq_init(void)
 {
 	struct irq_cfg *cfg;
-	int count, node, i;
+	int i, node = cpu_to_node(0);
 
-	if (!legacy_pic->nr_legacy_irqs)
+	if (!nr_legacy_irqs())
 		io_apic_irqs = ~0UL;
 
-	for (i = 0; i < nr_ioapics; i++) {
+	for_each_ioapic(i) {
 		ioapics[i].saved_registers =
 			kzalloc(sizeof(struct IO_APIC_route_entry) *
 				ioapics[i].nr_registers, GFP_KERNEL);
@@ -202,28 +253,20 @@ int __init arch_early_irq_init(void)
 			pr_err("IOAPIC %d: suspend/resume impossible!\n", i);
 	}
 
-	cfg = irq_cfgx;
-	count = ARRAY_SIZE(irq_cfgx);
-	node = cpu_to_node(0);
-
-	for (i = 0; i < count; i++) {
-		irq_set_chip_data(i, &cfg[i]);
-		zalloc_cpumask_var_node(&cfg[i].domain, GFP_KERNEL, node);
-		zalloc_cpumask_var_node(&cfg[i].old_domain, GFP_KERNEL, node);
-		/*
-		 * For legacy IRQ's, start with assigning irq0 to irq15 to
-		 * IRQ0_VECTOR to IRQ15_VECTOR for all cpu's.
-		 */
-		if (i < legacy_pic->nr_legacy_irqs) {
-			cfg[i].vector = IRQ0_VECTOR + i;
-			cpumask_setall(cfg[i].domain);
-		}
+	/*
+	 * For legacy IRQ's, start with assigning irq0 to irq15 to
+	 * IRQ0_VECTOR to IRQ15_VECTOR for all cpu's.
+	 */
+	for (i = 0; i < nr_legacy_irqs(); i++) {
+		cfg = alloc_irq_and_cfg_at(i, node);
+		cfg->vector = IRQ0_VECTOR + i;
+		cpumask_setall(cfg->domain);
 	}
 
 	return 0;
 }
 
-static struct irq_cfg *irq_cfg(unsigned int irq)
+static inline struct irq_cfg *irq_cfg(unsigned int irq)
 {
 	return irq_get_chip_data(irq);
 }
@@ -265,7 +308,7 @@ static struct irq_cfg *alloc_irq_and_cfg_at(unsigned int at, int node)
 	if (res < 0) {
 		if (res != -EEXIST)
 			return NULL;
-		cfg = irq_get_chip_data(at);
+		cfg = irq_cfg(at);
 		if (cfg)
 			return cfg;
 	}
@@ -425,6 +468,21 @@ static int __add_pin_to_irq_node(struct irq_cfg *cfg, int node, int apic, int pi
 	return 0;
 }
 
+static void __remove_pin_from_irq(struct irq_cfg *cfg, int apic, int pin)
+{
+	struct irq_pin_list **last, *entry;
+
+	last = &cfg->irq_2_pin;
+	for_each_irq_pin(entry, cfg->irq_2_pin)
+		if (entry->apic == apic && entry->pin == pin) {
+			*last = entry->next;
+			kfree(entry);
+			return;
+		} else {
+			last = &entry->next;
+		}
+}
+
 static void add_pin_to_irq_node(struct irq_cfg *cfg, int node, int apic, int pin)
 {
 	if (__add_pin_to_irq_node(cfg, node, apic, pin))
@@ -627,9 +685,8 @@ static void clear_IO_APIC (void)
 {
 	int apic, pin;
 
-	for (apic = 0; apic < nr_ioapics; apic++)
-		for (pin = 0; pin < ioapics[apic].nr_registers; pin++)
-			clear_IO_APIC_pin(apic, pin);
+	for_each_ioapic_pin(apic, pin)
+		clear_IO_APIC_pin(apic, pin);
 }
 
 #ifdef CONFIG_X86_32
@@ -678,13 +735,13 @@ int save_ioapic_entries(void)
 	int apic, pin;
 	int err = 0;
 
-	for (apic = 0; apic < nr_ioapics; apic++) {
+	for_each_ioapic(apic) {
 		if (!ioapics[apic].saved_registers) {
 			err = -ENOMEM;
 			continue;
 		}
 
-		for (pin = 0; pin < ioapics[apic].nr_registers; pin++)
+		for_each_pin(apic, pin)
 			ioapics[apic].saved_registers[pin] =
 				ioapic_read_entry(apic, pin);
 	}
@@ -699,11 +756,11 @@ void mask_ioapic_entries(void)
 {
 	int apic, pin;
 
-	for (apic = 0; apic < nr_ioapics; apic++) {
+	for_each_ioapic(apic) {
 		if (!ioapics[apic].saved_registers)
 			continue;
 
-		for (pin = 0; pin < ioapics[apic].nr_registers; pin++) {
+		for_each_pin(apic, pin) {
 			struct IO_APIC_route_entry entry;
 
 			entry = ioapics[apic].saved_registers[pin];
@@ -722,11 +779,11 @@ int restore_ioapic_entries(void)
 {
 	int apic, pin;
 
-	for (apic = 0; apic < nr_ioapics; apic++) {
+	for_each_ioapic(apic) {
 		if (!ioapics[apic].saved_registers)
 			continue;
 
-		for (pin = 0; pin < ioapics[apic].nr_registers; pin++)
+		for_each_pin(apic, pin)
 			ioapic_write_entry(apic, pin,
 					   ioapics[apic].saved_registers[pin]);
 	}
@@ -785,7 +842,7 @@ static int __init find_isa_irq_apic(int irq, int type)
 	if (i < mp_irq_entries) {
 		int ioapic_idx;
 
-		for (ioapic_idx = 0; ioapic_idx < nr_ioapics; ioapic_idx++)
+		for_each_ioapic(ioapic_idx)
 			if (mpc_ioapic_id(ioapic_idx) == mp_irqs[i].dstapic)
 				return ioapic_idx;
 	}
@@ -799,7 +856,7 @@ static int __init find_isa_irq_apic(int irq, int type)
  */
 static int EISA_ELCR(unsigned int irq)
 {
-	if (irq < legacy_pic->nr_legacy_irqs) {
+	if (irq < nr_legacy_irqs()) {
 		unsigned int port = 0x4d0 + (irq >> 3);
 		return (inb(port) >> (irq & 7)) & 1;
 	}
@@ -939,29 +996,101 @@ static int irq_trigger(int idx)
 	return trigger;
 }
 
-static int pin_2_irq(int idx, int apic, int pin)
+static int alloc_irq_from_domain(struct irq_domain *domain, u32 gsi, int pin)
+{
+	int irq = -1;
+	int ioapic = (int)(long)domain->host_data;
+	int type = ioapics[ioapic].irqdomain_cfg.type;
+
+	switch (type) {
+	case IOAPIC_DOMAIN_LEGACY:
+		/*
+		 * Dynamically allocate IRQ number for non-ISA IRQs in the first 16
+		 * GSIs on some weird platforms.
+		 */
+		if (gsi < nr_legacy_irqs())
+			irq = irq_create_mapping(domain, pin);
+		else if (irq_create_strict_mappings(domain, gsi, pin, 1) == 0)
+			irq = gsi;
+		break;
+	case IOAPIC_DOMAIN_STRICT:
+		if (irq_create_strict_mappings(domain, gsi, pin, 1) == 0)
+			irq = gsi;
+		break;
+	case IOAPIC_DOMAIN_DYNAMIC:
+		irq = irq_create_mapping(domain, pin);
+		break;
+	default:
+		WARN(1, "ioapic: unknown irqdomain type %d\n", type);
+		break;
+	}
+
+	return irq > 0 ? irq : -1;
+}
+
+static int mp_map_pin_to_irq(u32 gsi, int idx, int ioapic, int pin,
+			     unsigned int flags)
 {
 	int irq;
-	int bus = mp_irqs[idx].srcbus;
-	struct mp_ioapic_gsi *gsi_cfg = mp_ioapic_gsi_routing(apic);
+	struct irq_domain *domain = mp_ioapic_irqdomain(ioapic);
+	struct mp_pin_info *info = mp_pin_info(ioapic, pin);
+
+	if (!domain)
+		return -1;
+
+	mutex_lock(&ioapic_mutex);
 
 	/*
-	 * Debugging check, we are in big trouble if this message pops up!
+	 * Don't use irqdomain to manage ISA IRQs because there may be
+	 * multiple IOAPIC pins sharing the same ISA IRQ number and
+	 * irqdomain only supports 1:1 mapping between IOAPIC pin and
+	 * IRQ number. A typical IOAPIC has 24 pins, pin 0-15 are used
+	 * for legacy IRQs and pin 16-23 are used for PCI IRQs (PIRQ A-H).
+	 * When ACPI is disabled, only legacy IRQ numbers (IRQ0-15) are
+	 * available, and some BIOSes may use MP Interrupt Source records
+	 * to override IRQ numbers for PIRQs instead of reprogramming
+	 * the interrupt routing logic. Thus there may be multiple pins
+	 * sharing the same legacy IRQ number when ACPI is disabled.
 	 */
-	if (mp_irqs[idx].dstirq != pin)
-		pr_err("broken BIOS or MPTABLE parser, ayiee!!\n");
-
-	if (test_bit(bus, mp_bus_not_pci)) {
+	if (idx >= 0 && test_bit(mp_irqs[idx].srcbus, mp_bus_not_pci)) {
 		irq = mp_irqs[idx].srcbusirq;
+		if (flags & IOAPIC_MAP_ALLOC) {
+			if (info->count == 0 &&
+			    mp_irqdomain_map(domain, irq, pin) != 0)
+				irq = -1;
+
+			/* special handling for timer IRQ0 */
+			if (irq == 0)
+				info->count++;
+		}
 	} else {
-		u32 gsi = gsi_cfg->gsi_base + pin;
+		irq = irq_find_mapping(domain, pin);
+		if (irq <= 0 && (flags & IOAPIC_MAP_ALLOC))
+			irq = alloc_irq_from_domain(domain, gsi, pin);
+	}
 
-		if (gsi >= NR_IRQS_LEGACY)
-			irq = gsi;
-		else
-			irq = gsi_top + gsi;
+	if (flags & IOAPIC_MAP_ALLOC) {
+		if (irq > 0)
+			info->count++;
+		else if (info->count == 0)
+			info->set = 0;
 	}
 
+	mutex_unlock(&ioapic_mutex);
+
+	return irq > 0 ? irq : -1;
+}
+
+static int pin_2_irq(int idx, int ioapic, int pin, unsigned int flags)
+{
+	u32 gsi = mp_pin_to_gsi(ioapic, pin);
+
+	/*
+	 * Debugging check, we are in big trouble if this message pops up!
+	 */
+	if (mp_irqs[idx].dstirq != pin)
+		pr_err("broken BIOS or MPTABLE parser, ayiee!!\n");
+
 #ifdef CONFIG_X86_32
 	/*
 	 * PCI IRQ command line redirection. Yes, limits are hardcoded.
@@ -972,16 +1101,58 @@ static int pin_2_irq(int idx, int apic, int pin)
 				apic_printk(APIC_VERBOSE, KERN_DEBUG
 						"disabling PIRQ%d\n", pin-16);
 			} else {
-				irq = pirq_entries[pin-16];
+				int irq = pirq_entries[pin-16];
 				apic_printk(APIC_VERBOSE, KERN_DEBUG
 						"using PIRQ%d -> IRQ %d\n",
 						pin-16, irq);
+				return irq;
 			}
 		}
 	}
 #endif
 
-	return irq;
+	return  mp_map_pin_to_irq(gsi, idx, ioapic, pin, flags);
+}
+
+int mp_map_gsi_to_irq(u32 gsi, unsigned int flags)
+{
+	int ioapic, pin, idx;
+
+	ioapic = mp_find_ioapic(gsi);
+	if (ioapic < 0)
+		return -1;
+
+	pin = mp_find_ioapic_pin(ioapic, gsi);
+	idx = find_irq_entry(ioapic, pin, mp_INT);
+	if ((flags & IOAPIC_MAP_CHECK) && idx < 0)
+		return -1;
+
+	return mp_map_pin_to_irq(gsi, idx, ioapic, pin, flags);
+}
+
+void mp_unmap_irq(int irq)
+{
+	struct irq_data *data = irq_get_irq_data(irq);
+	struct mp_pin_info *info;
+	int ioapic, pin;
+
+	if (!data || !data->domain)
+		return;
+
+	ioapic = (int)(long)data->domain->host_data;
+	pin = (int)data->hwirq;
+	info = mp_pin_info(ioapic, pin);
+
+	mutex_lock(&ioapic_mutex);
+	if (--info->count == 0) {
+		info->set = 0;
+		if (irq < nr_legacy_irqs() &&
+		    ioapics[ioapic].irqdomain_cfg.type == IOAPIC_DOMAIN_LEGACY)
+			mp_irqdomain_unmap(data->domain, irq);
+		else
+			irq_dispose_mapping(irq);
+	}
+	mutex_unlock(&ioapic_mutex);
 }
 
 /*
@@ -991,7 +1162,7 @@ static int pin_2_irq(int idx, int apic, int pin)
 int IO_APIC_get_PCI_irq_vector(int bus, int slot, int pin,
 				struct io_apic_irq_attr *irq_attr)
 {
-	int ioapic_idx, i, best_guess = -1;
+	int irq, i, best_ioapic = -1, best_idx = -1;
 
 	apic_printk(APIC_DEBUG,
 		    "querying PCI -> IRQ mapping bus:%d, slot:%d, pin:%d.\n",
@@ -1001,44 +1172,56 @@ int IO_APIC_get_PCI_irq_vector(int bus, int slot, int pin,
 			    "PCI BIOS passed nonexistent PCI bus %d!\n", bus);
 		return -1;
 	}
+
 	for (i = 0; i < mp_irq_entries; i++) {
 		int lbus = mp_irqs[i].srcbus;
+		int ioapic_idx, found = 0;
 
-		for (ioapic_idx = 0; ioapic_idx < nr_ioapics; ioapic_idx++)
+		if (bus != lbus || mp_irqs[i].irqtype != mp_INT ||
+		    slot != ((mp_irqs[i].srcbusirq >> 2) & 0x1f))
+			continue;
+
+		for_each_ioapic(ioapic_idx)
 			if (mpc_ioapic_id(ioapic_idx) == mp_irqs[i].dstapic ||
-			    mp_irqs[i].dstapic == MP_APIC_ALL)
+			    mp_irqs[i].dstapic == MP_APIC_ALL) {
+				found = 1;
 				break;
+			}
+		if (!found)
+			continue;
 
-		if (!test_bit(lbus, mp_bus_not_pci) &&
-		    !mp_irqs[i].irqtype &&
-		    (bus == lbus) &&
-		    (slot == ((mp_irqs[i].srcbusirq >> 2) & 0x1f))) {
-			int irq = pin_2_irq(i, ioapic_idx, mp_irqs[i].dstirq);
+		/* Skip ISA IRQs */
+		irq = pin_2_irq(i, ioapic_idx, mp_irqs[i].dstirq, 0);
+		if (irq > 0 && !IO_APIC_IRQ(irq))
+			continue;
 
-			if (!(ioapic_idx || IO_APIC_IRQ(irq)))
-				continue;
+		if (pin == (mp_irqs[i].srcbusirq & 3)) {
+			best_idx = i;
+			best_ioapic = ioapic_idx;
+			goto out;
+		}
 
-			if (pin == (mp_irqs[i].srcbusirq & 3)) {
-				set_io_apic_irq_attr(irq_attr, ioapic_idx,
-						     mp_irqs[i].dstirq,
-						     irq_trigger(i),
-						     irq_polarity(i));
-				return irq;
-			}
-			/*
-			 * Use the first all-but-pin matching entry as a
-			 * best-guess fuzzy result for broken mptables.
-			 */
-			if (best_guess < 0) {
-				set_io_apic_irq_attr(irq_attr, ioapic_idx,
-						     mp_irqs[i].dstirq,
-						     irq_trigger(i),
-						     irq_polarity(i));
-				best_guess = irq;
-			}
+		/*
+		 * Use the first all-but-pin matching entry as a
+		 * best-guess fuzzy result for broken mptables.
+		 */
+		if (best_idx < 0) {
+			best_idx = i;
+			best_ioapic = ioapic_idx;
 		}
 	}
-	return best_guess;
+	if (best_idx < 0)
+		return -1;
+
+out:
+	irq = pin_2_irq(best_idx, best_ioapic, mp_irqs[best_idx].dstirq,
+			IOAPIC_MAP_ALLOC);
+	if (irq > 0)
+		set_io_apic_irq_attr(irq_attr, best_ioapic,
+				     mp_irqs[best_idx].dstirq,
+				     irq_trigger(best_idx),
+				     irq_polarity(best_idx));
+	return irq;
 }
 EXPORT_SYMBOL(IO_APIC_get_PCI_irq_vector);
 
@@ -1198,7 +1381,7 @@ void __setup_vector_irq(int cpu)
 	raw_spin_lock(&vector_lock);
 	/* Mark the inuse vectors */
 	for_each_active_irq(irq) {
-		cfg = irq_get_chip_data(irq);
+		cfg = irq_cfg(irq);
 		if (!cfg)
 			continue;
 
@@ -1227,12 +1410,10 @@ static inline int IO_APIC_irq_trigger(int irq)
 {
 	int apic, idx, pin;
 
-	for (apic = 0; apic < nr_ioapics; apic++) {
-		for (pin = 0; pin < ioapics[apic].nr_registers; pin++) {
-			idx = find_irq_entry(apic, pin, mp_INT);
-			if ((idx != -1) && (irq == pin_2_irq(idx, apic, pin)))
-				return irq_trigger(idx);
-		}
+	for_each_ioapic_pin(apic, pin) {
+		idx = find_irq_entry(apic, pin, mp_INT);
+		if ((idx != -1) && (irq == pin_2_irq(idx, apic, pin, 0)))
+			return irq_trigger(idx);
 	}
 	/*
          * nonexistent IRQs are edge default
@@ -1330,95 +1511,29 @@ static void setup_ioapic_irq(unsigned int irq, struct irq_cfg *cfg,
 	}
 
 	ioapic_register_intr(irq, cfg, attr->trigger);
-	if (irq < legacy_pic->nr_legacy_irqs)
+	if (irq < nr_legacy_irqs())
 		legacy_pic->mask(irq);
 
 	ioapic_write_entry(attr->ioapic, attr->ioapic_pin, entry);
 }
 
-static bool __init io_apic_pin_not_connected(int idx, int ioapic_idx, int pin)
-{
-	if (idx != -1)
-		return false;
-
-	apic_printk(APIC_VERBOSE, KERN_DEBUG " apic %d pin %d not connected\n",
-		    mpc_ioapic_id(ioapic_idx), pin);
-	return true;
-}
-
-static void __init __io_apic_setup_irqs(unsigned int ioapic_idx)
-{
-	int idx, node = cpu_to_node(0);
-	struct io_apic_irq_attr attr;
-	unsigned int pin, irq;
-
-	for (pin = 0; pin < ioapics[ioapic_idx].nr_registers; pin++) {
-		idx = find_irq_entry(ioapic_idx, pin, mp_INT);
-		if (io_apic_pin_not_connected(idx, ioapic_idx, pin))
-			continue;
-
-		irq = pin_2_irq(idx, ioapic_idx, pin);
-
-		if ((ioapic_idx > 0) && (irq > 16))
-			continue;
-
-		/*
-		 * Skip the timer IRQ if there's a quirk handler
-		 * installed and if it returns 1:
-		 */
-		if (apic->multi_timer_check &&
-		    apic->multi_timer_check(ioapic_idx, irq))
-			continue;
-
-		set_io_apic_irq_attr(&attr, ioapic_idx, pin, irq_trigger(idx),
-				     irq_polarity(idx));
-
-		io_apic_setup_irq_pin(irq, node, &attr);
-	}
-}
-
 static void __init setup_IO_APIC_irqs(void)
 {
-	unsigned int ioapic_idx;
+	unsigned int ioapic, pin;
+	int idx;
 
 	apic_printk(APIC_VERBOSE, KERN_DEBUG "init IO_APIC IRQs\n");
 
-	for (ioapic_idx = 0; ioapic_idx < nr_ioapics; ioapic_idx++)
-		__io_apic_setup_irqs(ioapic_idx);
-}
-
-/*
- * for the gsit that is not in first ioapic
- * but could not use acpi_register_gsi()
- * like some special sci in IBM x3330
- */
-void setup_IO_APIC_irq_extra(u32 gsi)
-{
-	int ioapic_idx = 0, pin, idx, irq, node = cpu_to_node(0);
-	struct io_apic_irq_attr attr;
-
-	/*
-	 * Convert 'gsi' to 'ioapic.pin'.
-	 */
-	ioapic_idx = mp_find_ioapic(gsi);
-	if (ioapic_idx < 0)
-		return;
-
-	pin = mp_find_ioapic_pin(ioapic_idx, gsi);
-	idx = find_irq_entry(ioapic_idx, pin, mp_INT);
-	if (idx == -1)
-		return;
-
-	irq = pin_2_irq(idx, ioapic_idx, pin);
-
-	/* Only handle the non legacy irqs on secondary ioapics */
-	if (ioapic_idx == 0 || irq < NR_IRQS_LEGACY)
-		return;
-
-	set_io_apic_irq_attr(&attr, ioapic_idx, pin, irq_trigger(idx),
-			     irq_polarity(idx));
-
-	io_apic_setup_irq_pin_once(irq, node, &attr);
+	for_each_ioapic_pin(ioapic, pin) {
+		idx = find_irq_entry(ioapic, pin, mp_INT);
+		if (idx < 0)
+			apic_printk(APIC_VERBOSE,
+				    KERN_DEBUG " apic %d pin %d not connected\n",
+				    mpc_ioapic_id(ioapic), pin);
+		else
+			pin_2_irq(idx, ioapic, pin,
+				  ioapic ? 0 : IOAPIC_MAP_ALLOC);
+	}
 }
 
 /*
@@ -1586,7 +1701,7 @@ __apicdebuginit(void) print_IO_APICs(void)
 	struct irq_chip *chip;
 
 	printk(KERN_DEBUG "number of MP IRQ sources: %d.\n", mp_irq_entries);
-	for (ioapic_idx = 0; ioapic_idx < nr_ioapics; ioapic_idx++)
+	for_each_ioapic(ioapic_idx)
 		printk(KERN_DEBUG "number of IO-APIC #%d registers: %d.\n",
 		       mpc_ioapic_id(ioapic_idx),
 		       ioapics[ioapic_idx].nr_registers);
@@ -1597,7 +1712,7 @@ __apicdebuginit(void) print_IO_APICs(void)
 	 */
 	printk(KERN_INFO "testing the IO APIC.......................\n");
 
-	for (ioapic_idx = 0; ioapic_idx < nr_ioapics; ioapic_idx++)
+	for_each_ioapic(ioapic_idx)
 		print_IO_APIC(ioapic_idx);
 
 	printk(KERN_DEBUG "IRQ to pin mappings:\n");
@@ -1608,7 +1723,7 @@ __apicdebuginit(void) print_IO_APICs(void)
 		if (chip != &ioapic_chip)
 			continue;
 
-		cfg = irq_get_chip_data(irq);
+		cfg = irq_cfg(irq);
 		if (!cfg)
 			continue;
 		entry = cfg->irq_2_pin;
@@ -1758,7 +1873,7 @@ __apicdebuginit(void) print_PIC(void)
 	unsigned int v;
 	unsigned long flags;
 
-	if (!legacy_pic->nr_legacy_irqs)
+	if (!nr_legacy_irqs())
 		return;
 
 	printk(KERN_DEBUG "\nprinting PIC contents\n");
@@ -1828,26 +1943,22 @@ static struct { int pin, apic; } ioapic_i8259 = { -1, -1 };
 void __init enable_IO_APIC(void)
 {
 	int i8259_apic, i8259_pin;
-	int apic;
+	int apic, pin;
 
-	if (!legacy_pic->nr_legacy_irqs)
+	if (!nr_legacy_irqs())
 		return;
 
-	for(apic = 0; apic < nr_ioapics; apic++) {
-		int pin;
+	for_each_ioapic_pin(apic, pin) {
 		/* See if any of the pins is in ExtINT mode */
-		for (pin = 0; pin < ioapics[apic].nr_registers; pin++) {
-			struct IO_APIC_route_entry entry;
-			entry = ioapic_read_entry(apic, pin);
+		struct IO_APIC_route_entry entry = ioapic_read_entry(apic, pin);
 
-			/* If the interrupt line is enabled and in ExtInt mode
-			 * I have found the pin where the i8259 is connected.
-			 */
-			if ((entry.mask == 0) && (entry.delivery_mode == dest_ExtINT)) {
-				ioapic_i8259.apic = apic;
-				ioapic_i8259.pin  = pin;
-				goto found_i8259;
-			}
+		/* If the interrupt line is enabled and in ExtInt mode
+		 * I have found the pin where the i8259 is connected.
+		 */
+		if ((entry.mask == 0) && (entry.delivery_mode == dest_ExtINT)) {
+			ioapic_i8259.apic = apic;
+			ioapic_i8259.pin  = pin;
+			goto found_i8259;
 		}
 	}
  found_i8259:
@@ -1919,7 +2030,7 @@ void disable_IO_APIC(void)
 	 */
 	clear_IO_APIC();
 
-	if (!legacy_pic->nr_legacy_irqs)
+	if (!nr_legacy_irqs())
 		return;
 
 	x86_io_apic_ops.disable();
@@ -1950,7 +2061,7 @@ void __init setup_ioapic_ids_from_mpc_nocheck(void)
 	/*
 	 * Set the IOAPIC ID to the value stored in the MPC table.
 	 */
-	for (ioapic_idx = 0; ioapic_idx < nr_ioapics; ioapic_idx++) {
+	for_each_ioapic(ioapic_idx) {
 		/* Read the register 0 value */
 		raw_spin_lock_irqsave(&ioapic_lock, flags);
 		reg_00.raw = io_apic_read(ioapic_idx, 0);
@@ -2123,7 +2234,7 @@ static unsigned int startup_ioapic_irq(struct irq_data *data)
 	unsigned long flags;
 
 	raw_spin_lock_irqsave(&ioapic_lock, flags);
-	if (irq < legacy_pic->nr_legacy_irqs) {
+	if (irq < nr_legacy_irqs()) {
 		legacy_pic->mask(irq);
 		if (legacy_pic->irq_pending(irq))
 			was_pending = 1;
@@ -2225,7 +2336,7 @@ asmlinkage __visible void smp_irq_move_cleanup_interrupt(void)
 			apic->send_IPI_self(IRQ_MOVE_CLEANUP_VECTOR);
 			goto unlock;
 		}
-		__this_cpu_write(vector_irq[vector], -1);
+		__this_cpu_write(vector_irq[vector], VECTOR_UNDEFINED);
 unlock:
 		raw_spin_unlock(&desc->lock);
 	}
@@ -2253,7 +2364,7 @@ static void irq_complete_move(struct irq_cfg *cfg)
 
 void irq_force_complete_move(int irq)
 {
-	struct irq_cfg *cfg = irq_get_chip_data(irq);
+	struct irq_cfg *cfg = irq_cfg(irq);
 
 	if (!cfg)
 		return;
@@ -2514,26 +2625,15 @@ static inline void init_IO_APIC_traps(void)
 	struct irq_cfg *cfg;
 	unsigned int irq;
 
-	/*
-	 * NOTE! The local APIC isn't very good at handling
-	 * multiple interrupts at the same interrupt level.
-	 * As the interrupt level is determined by taking the
-	 * vector number and shifting that right by 4, we
-	 * want to spread these out a bit so that they don't
-	 * all fall in the same interrupt level.
-	 *
-	 * Also, we've got to be careful not to trash gate
-	 * 0x80, because int 0x80 is hm, kind of importantish. ;)
-	 */
 	for_each_active_irq(irq) {
-		cfg = irq_get_chip_data(irq);
+		cfg = irq_cfg(irq);
 		if (IO_APIC_IRQ(irq) && cfg && !cfg->vector) {
 			/*
 			 * Hmm.. We don't have an entry for this,
 			 * so default to an old-fashioned 8259
 			 * interrupt if we can..
 			 */
-			if (irq < legacy_pic->nr_legacy_irqs)
+			if (irq < nr_legacy_irqs())
 				legacy_pic->make_irq(irq);
 			else
 				/* Strange. Oh, well.. */
@@ -2649,8 +2749,6 @@ static int __init disable_timer_pin_setup(char *arg)
 }
 early_param("disable_timer_pin_1", disable_timer_pin_setup);
 
-int timer_through_8259 __initdata;
-
 /*
  * This code may look a bit paranoid, but it's supposed to cooperate with
  * a wide range of boards and BIOS bugs.  Fortunately only the timer IRQ
@@ -2661,7 +2759,7 @@ int timer_through_8259 __initdata;
  */
 static inline void __init check_timer(void)
 {
-	struct irq_cfg *cfg = irq_get_chip_data(0);
+	struct irq_cfg *cfg = irq_cfg(0);
 	int node = cpu_to_node(0);
 	int apic1, pin1, apic2, pin2;
 	unsigned long flags;
@@ -2755,7 +2853,6 @@ static inline void __init check_timer(void)
 		legacy_pic->unmask(0);
 		if (timer_irq_works()) {
 			apic_printk(APIC_QUIET, KERN_INFO "....... works.\n");
-			timer_through_8259 = 1;
 			goto out;
 		}
 		/*
@@ -2827,15 +2924,54 @@ out:
  */
 #define PIC_IRQS	(1UL << PIC_CASCADE_IR)
 
+static int mp_irqdomain_create(int ioapic)
+{
+	size_t size;
+	int hwirqs = mp_ioapic_pin_count(ioapic);
+	struct ioapic *ip = &ioapics[ioapic];
+	struct ioapic_domain_cfg *cfg = &ip->irqdomain_cfg;
+	struct mp_ioapic_gsi *gsi_cfg = mp_ioapic_gsi_routing(ioapic);
+
+	size = sizeof(struct mp_pin_info) * mp_ioapic_pin_count(ioapic);
+	ip->pin_info = kzalloc(size, GFP_KERNEL);
+	if (!ip->pin_info)
+		return -ENOMEM;
+
+	if (cfg->type == IOAPIC_DOMAIN_INVALID)
+		return 0;
+
+	ip->irqdomain = irq_domain_add_linear(cfg->dev, hwirqs, cfg->ops,
+					      (void *)(long)ioapic);
+	if(!ip->irqdomain) {
+		kfree(ip->pin_info);
+		ip->pin_info = NULL;
+		return -ENOMEM;
+	}
+
+	if (cfg->type == IOAPIC_DOMAIN_LEGACY ||
+	    cfg->type == IOAPIC_DOMAIN_STRICT)
+		ioapic_dynirq_base = max(ioapic_dynirq_base,
+					 gsi_cfg->gsi_end + 1);
+
+	if (gsi_cfg->gsi_base == 0)
+		irq_set_default_host(ip->irqdomain);
+
+	return 0;
+}
+
 void __init setup_IO_APIC(void)
 {
+	int ioapic;
 
 	/*
 	 * calling enable_IO_APIC() is moved to setup_local_APIC for BP
 	 */
-	io_apic_irqs = legacy_pic->nr_legacy_irqs ? ~PIC_IRQS : ~0UL;
+	io_apic_irqs = nr_legacy_irqs() ? ~PIC_IRQS : ~0UL;
 
 	apic_printk(APIC_VERBOSE, "ENABLING IO-APIC IRQs\n");
+	for_each_ioapic(ioapic)
+		BUG_ON(mp_irqdomain_create(ioapic));
+
 	/*
          * Set up IO-APIC IRQ routing.
          */
@@ -2844,8 +2980,10 @@ void __init setup_IO_APIC(void)
 	sync_Arb_IDs();
 	setup_IO_APIC_irqs();
 	init_IO_APIC_traps();
-	if (legacy_pic->nr_legacy_irqs)
+	if (nr_legacy_irqs())
 		check_timer();
+
+	ioapic_initialized = 1;
 }
 
 /*
@@ -2880,7 +3018,7 @@ static void ioapic_resume(void)
 {
 	int ioapic_idx;
 
-	for (ioapic_idx = nr_ioapics - 1; ioapic_idx >= 0; ioapic_idx--)
+	for_each_ioapic_reverse(ioapic_idx)
 		resume_ioapic_id(ioapic_idx);
 
 	restore_ioapic_entries();
@@ -2926,7 +3064,7 @@ int arch_setup_hwirq(unsigned int irq, int node)
 
 void arch_teardown_hwirq(unsigned int irq)
 {
-	struct irq_cfg *cfg = irq_get_chip_data(irq);
+	struct irq_cfg *cfg = irq_cfg(irq);
 	unsigned long flags;
 
 	free_remapped_irq(irq);
@@ -3053,7 +3191,7 @@ int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc,
 	if (!irq_offset)
 		write_msi_msg(irq, &msg);
 
-	setup_remapped_irq(irq, irq_get_chip_data(irq), chip);
+	setup_remapped_irq(irq, irq_cfg(irq), chip);
 
 	irq_set_chip_and_handler_name(irq, chip, handle_edge_irq, "edge");
 
@@ -3192,7 +3330,7 @@ int default_setup_hpet_msi(unsigned int irq, unsigned int id)
 
 	hpet_msi_write(irq_get_handler_data(irq), &msg);
 	irq_set_status_flags(irq, IRQ_MOVE_PCNTXT);
-	setup_remapped_irq(irq, irq_get_chip_data(irq), chip);
+	setup_remapped_irq(irq, irq_cfg(irq), chip);
 
 	irq_set_chip_and_handler_name(irq, chip, handle_edge_irq, "edge");
 	return 0;
@@ -3303,27 +3441,6 @@ io_apic_setup_irq_pin(unsigned int irq, int node, struct io_apic_irq_attr *attr)
 	return ret;
 }
 
-int io_apic_setup_irq_pin_once(unsigned int irq, int node,
-			       struct io_apic_irq_attr *attr)
-{
-	unsigned int ioapic_idx = attr->ioapic, pin = attr->ioapic_pin;
-	int ret;
-	struct IO_APIC_route_entry orig_entry;
-
-	/* Avoid redundant programming */
-	if (test_bit(pin, ioapics[ioapic_idx].pin_programmed)) {
-		pr_debug("Pin %d-%d already programmed\n", mpc_ioapic_id(ioapic_idx), pin);
-		orig_entry = ioapic_read_entry(attr->ioapic, pin);
-		if (attr->trigger == orig_entry.trigger && attr->polarity == orig_entry.polarity)
-			return 0;
-		return -EBUSY;
-	}
-	ret = io_apic_setup_irq_pin(irq, node, attr);
-	if (!ret)
-		set_bit(pin, ioapics[ioapic_idx].pin_programmed);
-	return ret;
-}
-
 static int __init io_apic_get_redir_entries(int ioapic)
 {
 	union IO_APIC_reg_01	reg_01;
@@ -3340,20 +3457,13 @@ static int __init io_apic_get_redir_entries(int ioapic)
 	return reg_01.bits.entries + 1;
 }
 
-static void __init probe_nr_irqs_gsi(void)
-{
-	int nr;
-
-	nr = gsi_top + NR_IRQS_LEGACY;
-	if (nr > nr_irqs_gsi)
-		nr_irqs_gsi = nr;
-
-	printk(KERN_DEBUG "nr_irqs_gsi: %d\n", nr_irqs_gsi);
-}
-
 unsigned int arch_dynirq_lower_bound(unsigned int from)
 {
-	return from < nr_irqs_gsi ? nr_irqs_gsi : from;
+	/*
+	 * dmar_alloc_hwirq() may be called before setup_IO_APIC(), so use
+	 * gsi_top if ioapic_dynirq_base hasn't been initialized yet.
+	 */
+	return ioapic_initialized ? ioapic_dynirq_base : gsi_top;
 }
 
 int __init arch_probe_nr_irqs(void)
@@ -3363,33 +3473,17 @@ int __init arch_probe_nr_irqs(void)
 	if (nr_irqs > (NR_VECTORS * nr_cpu_ids))
 		nr_irqs = NR_VECTORS * nr_cpu_ids;
 
-	nr = nr_irqs_gsi + 8 * nr_cpu_ids;
+	nr = (gsi_top + nr_legacy_irqs()) + 8 * nr_cpu_ids;
 #if defined(CONFIG_PCI_MSI) || defined(CONFIG_HT_IRQ)
 	/*
 	 * for MSI and HT dyn irq
 	 */
-	nr += nr_irqs_gsi * 16;
+	nr += gsi_top * 16;
 #endif
 	if (nr < nr_irqs)
 		nr_irqs = nr;
 
-	return NR_IRQS_LEGACY;
-}
-
-int io_apic_set_pci_routing(struct device *dev, int irq,
-			    struct io_apic_irq_attr *irq_attr)
-{
-	int node;
-
-	if (!IO_APIC_IRQ(irq)) {
-		apic_printk(APIC_QUIET,KERN_ERR "IOAPIC[%d]: Invalid reference to IRQ 0\n",
-			    irq_attr->ioapic);
-		return -EINVAL;
-	}
-
-	node = dev ? dev_to_node(dev) : cpu_to_node(0);
-
-	return io_apic_setup_irq_pin_once(irq, node, irq_attr);
+	return 0;
 }
 
 #ifdef CONFIG_X86_32
@@ -3483,9 +3577,8 @@ static u8 __init io_apic_unique_id(u8 id)
 	DECLARE_BITMAP(used, 256);
 
 	bitmap_zero(used, 256);
-	for (i = 0; i < nr_ioapics; i++) {
+	for_each_ioapic(i)
 		__set_bit(mpc_ioapic_id(i), used);
-	}
 	if (!test_bit(id, used))
 		return id;
 	return find_first_zero_bit(used, 256);
@@ -3543,14 +3636,13 @@ void __init setup_ioapic_dest(void)
 	if (skip_ioapic_setup == 1)
 		return;
 
-	for (ioapic = 0; ioapic < nr_ioapics; ioapic++)
-	for (pin = 0; pin < ioapics[ioapic].nr_registers; pin++) {
+	for_each_ioapic_pin(ioapic, pin) {
 		irq_entry = find_irq_entry(ioapic, pin, mp_INT);
 		if (irq_entry == -1)
 			continue;
-		irq = pin_2_irq(irq_entry, ioapic, pin);
 
-		if ((ioapic > 0) && (irq > 16))
+		irq = pin_2_irq(irq_entry, ioapic, pin, 0);
+		if (irq < 0 || !mp_init_irq_at_boot(ioapic, irq))
 			continue;
 
 		idata = irq_get_irq_data(irq);
@@ -3573,29 +3665,33 @@ void __init setup_ioapic_dest(void)
 
 static struct resource *ioapic_resources;
 
-static struct resource * __init ioapic_setup_resources(int nr_ioapics)
+static struct resource * __init ioapic_setup_resources(void)
 {
 	unsigned long n;
 	struct resource *res;
 	char *mem;
-	int i;
+	int i, num = 0;
 
-	if (nr_ioapics <= 0)
+	for_each_ioapic(i)
+		num++;
+	if (num == 0)
 		return NULL;
 
 	n = IOAPIC_RESOURCE_NAME_SIZE + sizeof(struct resource);
-	n *= nr_ioapics;
+	n *= num;
 
 	mem = alloc_bootmem(n);
 	res = (void *)mem;
 
-	mem += sizeof(struct resource) * nr_ioapics;
+	mem += sizeof(struct resource) * num;
 
-	for (i = 0; i < nr_ioapics; i++) {
-		res[i].name = mem;
-		res[i].flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+	num = 0;
+	for_each_ioapic(i) {
+		res[num].name = mem;
+		res[num].flags = IORESOURCE_MEM | IORESOURCE_BUSY;
 		snprintf(mem, IOAPIC_RESOURCE_NAME_SIZE, "IOAPIC %u", i);
 		mem += IOAPIC_RESOURCE_NAME_SIZE;
+		num++;
 	}
 
 	ioapic_resources = res;
@@ -3609,8 +3705,8 @@ void __init native_io_apic_init_mappings(void)
 	struct resource *ioapic_res;
 	int i;
 
-	ioapic_res = ioapic_setup_resources(nr_ioapics);
-	for (i = 0; i < nr_ioapics; i++) {
+	ioapic_res = ioapic_setup_resources();
+	for_each_ioapic(i) {
 		if (smp_found_config) {
 			ioapic_phys = mpc_ioapic_addr(i);
 #ifdef CONFIG_X86_32
@@ -3641,8 +3737,6 @@ fake_ioapic_page:
 		ioapic_res->end = ioapic_phys + IO_APIC_SLOT_SIZE - 1;
 		ioapic_res++;
 	}
-
-	probe_nr_irqs_gsi();
 }
 
 void __init ioapic_insert_resources(void)
@@ -3657,7 +3751,7 @@ void __init ioapic_insert_resources(void)
 		return;
 	}
 
-	for (i = 0; i < nr_ioapics; i++) {
+	for_each_ioapic(i) {
 		insert_resource(&iomem_resource, r);
 		r++;
 	}
@@ -3665,16 +3759,15 @@ void __init ioapic_insert_resources(void)
 
 int mp_find_ioapic(u32 gsi)
 {
-	int i = 0;
+	int i;
 
 	if (nr_ioapics == 0)
 		return -1;
 
 	/* Find the IOAPIC that manages this GSI. */
-	for (i = 0; i < nr_ioapics; i++) {
+	for_each_ioapic(i) {
 		struct mp_ioapic_gsi *gsi_cfg = mp_ioapic_gsi_routing(i);
-		if ((gsi >= gsi_cfg->gsi_base)
-		    && (gsi <= gsi_cfg->gsi_end))
+		if (gsi >= gsi_cfg->gsi_base && gsi <= gsi_cfg->gsi_end)
 			return i;
 	}
 
@@ -3686,7 +3779,7 @@ int mp_find_ioapic_pin(int ioapic, u32 gsi)
 {
 	struct mp_ioapic_gsi *gsi_cfg;
 
-	if (WARN_ON(ioapic == -1))
+	if (WARN_ON(ioapic < 0))
 		return -1;
 
 	gsi_cfg = mp_ioapic_gsi_routing(ioapic);
@@ -3729,7 +3822,8 @@ static __init int bad_ioapic_register(int idx)
 	return 0;
 }
 
-void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
+void __init mp_register_ioapic(int id, u32 address, u32 gsi_base,
+			       struct ioapic_domain_cfg *cfg)
 {
 	int idx = 0;
 	int entries;
@@ -3743,6 +3837,8 @@ void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
 	ioapics[idx].mp_config.type = MP_IOAPIC;
 	ioapics[idx].mp_config.flags = MPC_APIC_USABLE;
 	ioapics[idx].mp_config.apicaddr = address;
+	ioapics[idx].irqdomain = NULL;
+	ioapics[idx].irqdomain_cfg = *cfg;
 
 	set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
 
@@ -3779,6 +3875,77 @@ void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
 	nr_ioapics++;
 }
 
+int mp_irqdomain_map(struct irq_domain *domain, unsigned int virq,
+		     irq_hw_number_t hwirq)
+{
+	int ioapic = (int)(long)domain->host_data;
+	struct mp_pin_info *info = mp_pin_info(ioapic, hwirq);
+	struct io_apic_irq_attr attr;
+
+	/* Get default attribute if not set by caller yet */
+	if (!info->set) {
+		u32 gsi = mp_pin_to_gsi(ioapic, hwirq);
+
+		if (acpi_get_override_irq(gsi, &info->trigger,
+					  &info->polarity) < 0) {
+			/*
+			 * PCI interrupts are always polarity one level
+			 * triggered.
+			 */
+			info->trigger = 1;
+			info->polarity = 1;
+		}
+		info->node = NUMA_NO_NODE;
+		info->set = 1;
+	}
+	set_io_apic_irq_attr(&attr, ioapic, hwirq, info->trigger,
+			     info->polarity);
+
+	return io_apic_setup_irq_pin(virq, info->node, &attr);
+}
+
+void mp_irqdomain_unmap(struct irq_domain *domain, unsigned int virq)
+{
+	struct irq_data *data = irq_get_irq_data(virq);
+	struct irq_cfg *cfg = irq_cfg(virq);
+	int ioapic = (int)(long)domain->host_data;
+	int pin = (int)data->hwirq;
+
+	ioapic_mask_entry(ioapic, pin);
+	__remove_pin_from_irq(cfg, ioapic, pin);
+	WARN_ON(cfg->irq_2_pin != NULL);
+	arch_teardown_hwirq(virq);
+}
+
+int mp_set_gsi_attr(u32 gsi, int trigger, int polarity, int node)
+{
+	int ret = 0;
+	int ioapic, pin;
+	struct mp_pin_info *info;
+
+	ioapic = mp_find_ioapic(gsi);
+	if (ioapic < 0)
+		return -ENODEV;
+
+	pin = mp_find_ioapic_pin(ioapic, gsi);
+	info = mp_pin_info(ioapic, pin);
+	trigger = trigger ? 1 : 0;
+	polarity = polarity ? 1 : 0;
+
+	mutex_lock(&ioapic_mutex);
+	if (!info->set) {
+		info->trigger = trigger;
+		info->polarity = polarity;
+		info->node = node;
+		info->set = 1;
+	} else if (info->trigger != trigger || info->polarity != polarity) {
+		ret = -EBUSY;
+	}
+	mutex_unlock(&ioapic_mutex);
+
+	return ret;
+}
+
 /* Enable IOAPIC early just for system timer */
 void __init pre_init_apic_IRQ0(void)
 {
diff --git a/arch/x86/kernel/apic/probe_32.c b/arch/x86/kernel/apic/probe_32.c
index cceb352c968..bda488680db 100644
--- a/arch/x86/kernel/apic/probe_32.c
+++ b/arch/x86/kernel/apic/probe_32.c
@@ -88,21 +88,16 @@ static struct apic apic_default = {
 	.disable_esr			= 0,
 	.dest_logical			= APIC_DEST_LOGICAL,
 	.check_apicid_used		= default_check_apicid_used,
-	.check_apicid_present		= default_check_apicid_present,
 
 	.vector_allocation_domain	= flat_vector_allocation_domain,
 	.init_apic_ldr			= default_init_apic_ldr,
 
 	.ioapic_phys_id_map		= default_ioapic_phys_id_map,
 	.setup_apic_routing		= setup_apic_flat_routing,
-	.multi_timer_check		= NULL,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.apicid_to_cpu_present		= physid_set_mask_of_physid,
-	.setup_portio_remap		= NULL,
 	.check_phys_apicid_present	= default_check_phys_apicid_present,
-	.enable_apic_mode		= NULL,
 	.phys_pkg_id			= default_phys_pkg_id,
-	.mps_oem_check			= NULL,
 
 	.get_apic_id			= default_get_apic_id,
 	.set_apic_id			= NULL,
@@ -116,11 +111,7 @@ static struct apic apic_default = {
 	.send_IPI_all			= default_send_IPI_all,
 	.send_IPI_self			= default_send_IPI_self,
 
-	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
-	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
-
 	.wait_for_init_deassert		= true,
-	.smp_callin_clear_local_apic	= NULL,
 	.inquire_remote_apic		= default_inquire_remote_apic,
 
 	.read				= native_apic_mem_read,
@@ -214,29 +205,7 @@ void __init generic_apic_probe(void)
 	printk(KERN_INFO "Using APIC driver %s\n", apic->name);
 }
 
-/* These functions can switch the APIC even after the initial ->probe() */
-
-int __init
-generic_mps_oem_check(struct mpc_table *mpc, char *oem, char *productid)
-{
-	struct apic **drv;
-
-	for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
-		if (!((*drv)->mps_oem_check))
-			continue;
-		if (!(*drv)->mps_oem_check(mpc, oem, productid))
-			continue;
-
-		if (!cmdline_apic) {
-			apic = *drv;
-			printk(KERN_INFO "Switched to APIC driver `%s'.\n",
-			       apic->name);
-		}
-		return 1;
-	}
-	return 0;
-}
-
+/* This function can switch the APIC even after the initial ->probe() */
 int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 {
 	struct apic **drv;
diff --git a/arch/x86/kernel/apic/x2apic_cluster.c b/arch/x86/kernel/apic/x2apic_cluster.c
index e66766bf164..6ce600f9bc7 100644
--- a/arch/x86/kernel/apic/x2apic_cluster.c
+++ b/arch/x86/kernel/apic/x2apic_cluster.c
@@ -249,21 +249,16 @@ static struct apic apic_x2apic_cluster = {
 	.disable_esr			= 0,
 	.dest_logical			= APIC_DEST_LOGICAL,
 	.check_apicid_used		= NULL,
-	.check_apicid_present		= NULL,
 
 	.vector_allocation_domain	= cluster_vector_allocation_domain,
 	.init_apic_ldr			= init_x2apic_ldr,
 
 	.ioapic_phys_id_map		= NULL,
 	.setup_apic_routing		= NULL,
-	.multi_timer_check		= NULL,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.apicid_to_cpu_present		= NULL,
-	.setup_portio_remap		= NULL,
 	.check_phys_apicid_present	= default_check_phys_apicid_present,
-	.enable_apic_mode		= NULL,
 	.phys_pkg_id			= x2apic_phys_pkg_id,
-	.mps_oem_check			= NULL,
 
 	.get_apic_id			= x2apic_get_apic_id,
 	.set_apic_id			= x2apic_set_apic_id,
@@ -277,10 +272,7 @@ static struct apic apic_x2apic_cluster = {
 	.send_IPI_all			= x2apic_send_IPI_all,
 	.send_IPI_self			= x2apic_send_IPI_self,
 
-	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
-	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
 	.wait_for_init_deassert		= false,
-	.smp_callin_clear_local_apic	= NULL,
 	.inquire_remote_apic		= NULL,
 
 	.read				= native_apic_msr_read,
diff --git a/arch/x86/kernel/apic/x2apic_phys.c b/arch/x86/kernel/apic/x2apic_phys.c
index 6d600ebf6c1..6fae733e919 100644
--- a/arch/x86/kernel/apic/x2apic_phys.c
+++ b/arch/x86/kernel/apic/x2apic_phys.c
@@ -103,21 +103,16 @@ static struct apic apic_x2apic_phys = {
 	.disable_esr			= 0,
 	.dest_logical			= 0,
 	.check_apicid_used		= NULL,
-	.check_apicid_present		= NULL,
 
 	.vector_allocation_domain	= default_vector_allocation_domain,
 	.init_apic_ldr			= init_x2apic_ldr,
 
 	.ioapic_phys_id_map		= NULL,
 	.setup_apic_routing		= NULL,
-	.multi_timer_check		= NULL,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.apicid_to_cpu_present		= NULL,
-	.setup_portio_remap		= NULL,
 	.check_phys_apicid_present	= default_check_phys_apicid_present,
-	.enable_apic_mode		= NULL,
 	.phys_pkg_id			= x2apic_phys_pkg_id,
-	.mps_oem_check			= NULL,
 
 	.get_apic_id			= x2apic_get_apic_id,
 	.set_apic_id			= x2apic_set_apic_id,
@@ -131,10 +126,7 @@ static struct apic apic_x2apic_phys = {
 	.send_IPI_all			= x2apic_send_IPI_all,
 	.send_IPI_self			= x2apic_send_IPI_self,
 
-	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
-	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
 	.wait_for_init_deassert		= false,
-	.smp_callin_clear_local_apic	= NULL,
 	.inquire_remote_apic		= NULL,
 
 	.read				= native_apic_msr_read,
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 293b41df54e..004f017aa7b 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -365,21 +365,16 @@ static struct apic __refdata apic_x2apic_uv_x = {
 	.disable_esr			= 0,
 	.dest_logical			= APIC_DEST_LOGICAL,
 	.check_apicid_used		= NULL,
-	.check_apicid_present		= NULL,
 
 	.vector_allocation_domain	= default_vector_allocation_domain,
 	.init_apic_ldr			= uv_init_apic_ldr,
 
 	.ioapic_phys_id_map		= NULL,
 	.setup_apic_routing		= NULL,
-	.multi_timer_check		= NULL,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.apicid_to_cpu_present		= NULL,
-	.setup_portio_remap		= NULL,
 	.check_phys_apicid_present	= default_check_phys_apicid_present,
-	.enable_apic_mode		= NULL,
 	.phys_pkg_id			= uv_phys_pkg_id,
-	.mps_oem_check			= NULL,
 
 	.get_apic_id			= x2apic_get_apic_id,
 	.set_apic_id			= set_apic_id,
@@ -394,10 +389,7 @@ static struct apic __refdata apic_x2apic_uv_x = {
 	.send_IPI_self			= uv_send_IPI_self,
 
 	.wakeup_secondary_cpu		= uv_wakeup_secondary,
-	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
-	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
 	.wait_for_init_deassert		= false,
-	.smp_callin_clear_local_apic	= NULL,
 	.inquire_remote_apic		= NULL,
 
 	.read				= native_apic_msr_read,
diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c
index 7db54b5d5f8..3d350335124 100644
--- a/arch/x86/kernel/devicetree.c
+++ b/arch/x86/kernel/devicetree.c
@@ -21,6 +21,7 @@
 #include <asm/apic.h>
 #include <asm/pci_x86.h>
 #include <asm/setup.h>
+#include <asm/i8259.h>
 
 __initdata u64 initial_dtb;
 char __initdata cmd_line[COMMAND_LINE_SIZE];
@@ -165,82 +166,6 @@ static void __init dtb_lapic_setup(void)
 #ifdef CONFIG_X86_IO_APIC
 static unsigned int ioapic_id;
 
-static void __init dtb_add_ioapic(struct device_node *dn)
-{
-	struct resource r;
-	int ret;
-
-	ret = of_address_to_resource(dn, 0, &r);
-	if (ret) {
-		printk(KERN_ERR "Can't obtain address from node %s.\n",
-				dn->full_name);
-		return;
-	}
-	mp_register_ioapic(++ioapic_id, r.start, gsi_top);
-}
-
-static void __init dtb_ioapic_setup(void)
-{
-	struct device_node *dn;
-
-	for_each_compatible_node(dn, NULL, "intel,ce4100-ioapic")
-		dtb_add_ioapic(dn);
-
-	if (nr_ioapics) {
-		of_ioapic = 1;
-		return;
-	}
-	printk(KERN_ERR "Error: No information about IO-APIC in OF.\n");
-}
-#else
-static void __init dtb_ioapic_setup(void) {}
-#endif
-
-static void __init dtb_apic_setup(void)
-{
-	dtb_lapic_setup();
-	dtb_ioapic_setup();
-}
-
-#ifdef CONFIG_OF_FLATTREE
-static void __init x86_flattree_get_config(void)
-{
-	u32 size, map_len;
-	void *dt;
-
-	if (!initial_dtb)
-		return;
-
-	map_len = max(PAGE_SIZE - (initial_dtb & ~PAGE_MASK), (u64)128);
-
-	initial_boot_params = dt = early_memremap(initial_dtb, map_len);
-	size = of_get_flat_dt_size();
-	if (map_len < size) {
-		early_iounmap(dt, map_len);
-		initial_boot_params = dt = early_memremap(initial_dtb, size);
-		map_len = size;
-	}
-
-	unflatten_and_copy_device_tree();
-	early_iounmap(dt, map_len);
-}
-#else
-static inline void x86_flattree_get_config(void) { }
-#endif
-
-void __init x86_dtb_init(void)
-{
-	x86_flattree_get_config();
-
-	if (!of_have_populated_dt())
-		return;
-
-	dtb_setup_hpet();
-	dtb_apic_setup();
-}
-
-#ifdef CONFIG_X86_IO_APIC
-
 struct of_ioapic_type {
 	u32 out_type;
 	u32 trigger;
@@ -276,10 +201,8 @@ static int ioapic_xlate(struct irq_domain *domain,
 			const u32 *intspec, u32 intsize,
 			irq_hw_number_t *out_hwirq, u32 *out_type)
 {
-	struct io_apic_irq_attr attr;
 	struct of_ioapic_type *it;
-	u32 line, idx;
-	int rc;
+	u32 line, idx, gsi;
 
 	if (WARN_ON(intsize < 2))
 		return -EINVAL;
@@ -291,13 +214,10 @@ static int ioapic_xlate(struct irq_domain *domain,
 
 	it = &of_ioapic_type[intspec[1]];
 
-	idx = (u32) domain->host_data;
-	set_io_apic_irq_attr(&attr, idx, line, it->trigger, it->polarity);
-
-	rc = io_apic_setup_irq_pin_once(irq_find_mapping(domain, line),
-					cpu_to_node(0), &attr);
-	if (rc)
-		return rc;
+	idx = (u32)(long)domain->host_data;
+	gsi = mp_pin_to_gsi(idx, line);
+	if (mp_set_gsi_attr(gsi, it->trigger, it->polarity, cpu_to_node(0)))
+		return -EBUSY;
 
 	*out_hwirq = line;
 	*out_type = it->out_type;
@@ -305,81 +225,86 @@ static int ioapic_xlate(struct irq_domain *domain,
 }
 
 const struct irq_domain_ops ioapic_irq_domain_ops = {
+	.map = mp_irqdomain_map,
+	.unmap = mp_irqdomain_unmap,
 	.xlate = ioapic_xlate,
 };
 
-static void dt_add_ioapic_domain(unsigned int ioapic_num,
-		struct device_node *np)
+static void __init dtb_add_ioapic(struct device_node *dn)
 {
-	struct irq_domain *id;
-	struct mp_ioapic_gsi *gsi_cfg;
+	struct resource r;
 	int ret;
-	int num;
-
-	gsi_cfg = mp_ioapic_gsi_routing(ioapic_num);
-	num = gsi_cfg->gsi_end - gsi_cfg->gsi_base + 1;
-
-	id = irq_domain_add_linear(np, num, &ioapic_irq_domain_ops,
-			(void *)ioapic_num);
-	BUG_ON(!id);
-	if (gsi_cfg->gsi_base == 0) {
-		/*
-		 * The first NR_IRQS_LEGACY irq descs are allocated in
-		 * early_irq_init() and need just a mapping. The
-		 * remaining irqs need both. All of them are preallocated
-		 * and assigned so we can keep the 1:1 mapping which the ioapic
-		 * is having.
-		 */
-		irq_domain_associate_many(id, 0, 0, NR_IRQS_LEGACY);
-
-		if (num > NR_IRQS_LEGACY) {
-			ret = irq_create_strict_mappings(id, NR_IRQS_LEGACY,
-					NR_IRQS_LEGACY, num - NR_IRQS_LEGACY);
-			if (ret)
-				pr_err("Error creating mapping for the "
-						"remaining IRQs: %d\n", ret);
-		}
-		irq_set_default_host(id);
-	} else {
-		ret = irq_create_strict_mappings(id, gsi_cfg->gsi_base, 0, num);
-		if (ret)
-			pr_err("Error creating IRQ mapping: %d\n", ret);
+	struct ioapic_domain_cfg cfg = {
+		.type = IOAPIC_DOMAIN_DYNAMIC,
+		.ops = &ioapic_irq_domain_ops,
+		.dev = dn,
+	};
+
+	ret = of_address_to_resource(dn, 0, &r);
+	if (ret) {
+		printk(KERN_ERR "Can't obtain address from node %s.\n",
+				dn->full_name);
+		return;
 	}
+	mp_register_ioapic(++ioapic_id, r.start, gsi_top, &cfg);
 }
 
-static void __init ioapic_add_ofnode(struct device_node *np)
+static void __init dtb_ioapic_setup(void)
 {
-	struct resource r;
-	int i, ret;
+	struct device_node *dn;
 
-	ret = of_address_to_resource(np, 0, &r);
-	if (ret) {
-		printk(KERN_ERR "Failed to obtain address for %s\n",
-				np->full_name);
+	for_each_compatible_node(dn, NULL, "intel,ce4100-ioapic")
+		dtb_add_ioapic(dn);
+
+	if (nr_ioapics) {
+		of_ioapic = 1;
 		return;
 	}
+	printk(KERN_ERR "Error: No information about IO-APIC in OF.\n");
+}
+#else
+static void __init dtb_ioapic_setup(void) {}
+#endif
 
-	for (i = 0; i < nr_ioapics; i++) {
-		if (r.start == mpc_ioapic_addr(i)) {
-			dt_add_ioapic_domain(i, np);
-			return;
-		}
-	}
-	printk(KERN_ERR "IOxAPIC at %s is not registered.\n", np->full_name);
+static void __init dtb_apic_setup(void)
+{
+	dtb_lapic_setup();
+	dtb_ioapic_setup();
 }
 
-void __init x86_add_irq_domains(void)
+#ifdef CONFIG_OF_FLATTREE
+static void __init x86_flattree_get_config(void)
 {
-	struct device_node *dp;
+	u32 size, map_len;
+	void *dt;
 
-	if (!of_have_populated_dt())
+	if (!initial_dtb)
 		return;
 
-	for_each_node_with_property(dp, "interrupt-controller") {
-		if (of_device_is_compatible(dp, "intel,ce4100-ioapic"))
-			ioapic_add_ofnode(dp);
+	map_len = max(PAGE_SIZE - (initial_dtb & ~PAGE_MASK), (u64)128);
+
+	initial_boot_params = dt = early_memremap(initial_dtb, map_len);
+	size = of_get_flat_dt_size();
+	if (map_len < size) {
+		early_iounmap(dt, map_len);
+		initial_boot_params = dt = early_memremap(initial_dtb, size);
+		map_len = size;
 	}
+
+	unflatten_and_copy_device_tree();
+	early_iounmap(dt, map_len);
 }
 #else
-void __init x86_add_irq_domains(void) { }
+static inline void x86_flattree_get_config(void) { }
 #endif
+
+void __init x86_dtb_init(void)
+{
+	x86_flattree_get_config();
+
+	if (!of_have_populated_dt())
+		return;
+
+	dtb_setup_hpet();
+	dtb_apic_setup();
+}
diff --git a/arch/x86/kernel/irqinit.c b/arch/x86/kernel/irqinit.c
index 7f50156542f..1e6cff5814f 100644
--- a/arch/x86/kernel/irqinit.c
+++ b/arch/x86/kernel/irqinit.c
@@ -78,7 +78,7 @@ void __init init_ISA_irqs(void)
 #endif
 	legacy_pic->init(0);
 
-	for (i = 0; i < legacy_pic->nr_legacy_irqs; i++)
+	for (i = 0; i < nr_legacy_irqs(); i++)
 		irq_set_chip_and_handler_name(i, chip, handle_level_irq, name);
 }
 
@@ -87,12 +87,6 @@ void __init init_IRQ(void)
 	int i;
 
 	/*
-	 * We probably need a better place for this, but it works for
-	 * now ...
-	 */
-	x86_add_irq_domains();
-
-	/*
 	 * On cpu 0, Assign IRQ0_VECTOR..IRQ15_VECTOR's to IRQ 0..15.
 	 * If these IRQ's are handled by legacy interrupt-controllers like PIC,
 	 * then this configuration will likely be static after the boot. If
@@ -100,7 +94,7 @@ void __init init_IRQ(void)
 	 * then this vector space can be freed and re-used dynamically as the
 	 * irq's migrate etc.
 	 */
-	for (i = 0; i < legacy_pic->nr_legacy_irqs; i++)
+	for (i = 0; i < nr_legacy_irqs(); i++)
 		per_cpu(vector_irq, 0)[IRQ0_VECTOR + i] = i;
 
 	x86_init.irqs.intr_init();
@@ -121,7 +115,7 @@ void setup_vector_irq(int cpu)
 	 * legacy PIC, for the new cpu that is coming online, setup the static
 	 * legacy vector to irq mapping:
 	 */
-	for (irq = 0; irq < legacy_pic->nr_legacy_irqs; irq++)
+	for (irq = 0; irq < nr_legacy_irqs(); irq++)
 		per_cpu(vector_irq, cpu)[IRQ0_VECTOR + irq] = irq;
 #endif
 
diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index d2b56489d70..2d2a237f2c7 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -19,6 +19,7 @@
 #include <linux/module.h>
 #include <linux/smp.h>
 #include <linux/pci.h>
+#include <linux/irqdomain.h>
 
 #include <asm/mtrr.h>
 #include <asm/mpspec.h>
@@ -67,7 +68,7 @@ static void __init MP_processor_info(struct mpc_cpu *m)
 		boot_cpu_physical_apicid = m->apicid;
 	}
 
-	printk(KERN_INFO "Processor #%d%s\n", m->apicid, bootup_cpu);
+	pr_info("Processor #%d%s\n", m->apicid, bootup_cpu);
 	generic_processor_info(apicid, m->apicver);
 }
 
@@ -87,9 +88,8 @@ static void __init MP_bus_info(struct mpc_bus *m)
 
 #if MAX_MP_BUSSES < 256
 	if (m->busid >= MAX_MP_BUSSES) {
-		printk(KERN_WARNING "MP table busid value (%d) for bustype %s "
-		       " is too large, max. supported is %d\n",
-		       m->busid, str, MAX_MP_BUSSES - 1);
+		pr_warn("MP table busid value (%d) for bustype %s is too large, max. supported is %d\n",
+			m->busid, str, MAX_MP_BUSSES - 1);
 		return;
 	}
 #endif
@@ -110,19 +110,29 @@ static void __init MP_bus_info(struct mpc_bus *m)
 		mp_bus_id_to_type[m->busid] = MP_BUS_EISA;
 #endif
 	} else
-		printk(KERN_WARNING "Unknown bustype %s - ignoring\n", str);
+		pr_warn("Unknown bustype %s - ignoring\n", str);
 }
 
+static struct irq_domain_ops mp_ioapic_irqdomain_ops = {
+	.map = mp_irqdomain_map,
+	.unmap = mp_irqdomain_unmap,
+};
+
 static void __init MP_ioapic_info(struct mpc_ioapic *m)
 {
+	struct ioapic_domain_cfg cfg = {
+		.type = IOAPIC_DOMAIN_LEGACY,
+		.ops = &mp_ioapic_irqdomain_ops,
+	};
+
 	if (m->flags & MPC_APIC_USABLE)
-		mp_register_ioapic(m->apicid, m->apicaddr, gsi_top);
+		mp_register_ioapic(m->apicid, m->apicaddr, gsi_top, &cfg);
 }
 
 static void __init print_mp_irq_info(struct mpc_intsrc *mp_irq)
 {
-	apic_printk(APIC_VERBOSE, "Int: type %d, pol %d, trig %d, bus %02x,"
-		" IRQ %02x, APIC ID %x, APIC INT %02x\n",
+	apic_printk(APIC_VERBOSE,
+		"Int: type %d, pol %d, trig %d, bus %02x, IRQ %02x, APIC ID %x, APIC INT %02x\n",
 		mp_irq->irqtype, mp_irq->irqflag & 3,
 		(mp_irq->irqflag >> 2) & 3, mp_irq->srcbus,
 		mp_irq->srcbusirq, mp_irq->dstapic, mp_irq->dstirq);
@@ -135,8 +145,8 @@ static inline void __init MP_ioapic_info(struct mpc_ioapic *m) {}
 
 static void __init MP_lintsrc_info(struct mpc_lintsrc *m)
 {
-	apic_printk(APIC_VERBOSE, "Lint: type %d, pol %d, trig %d, bus %02x,"
-		" IRQ %02x, APIC ID %x, APIC LINT %02x\n",
+	apic_printk(APIC_VERBOSE,
+		"Lint: type %d, pol %d, trig %d, bus %02x, IRQ %02x, APIC ID %x, APIC LINT %02x\n",
 		m->irqtype, m->irqflag & 3, (m->irqflag >> 2) & 3, m->srcbusid,
 		m->srcbusirq, m->destapic, m->destapiclint);
 }
@@ -148,34 +158,33 @@ static int __init smp_check_mpc(struct mpc_table *mpc, char *oem, char *str)
 {
 
 	if (memcmp(mpc->signature, MPC_SIGNATURE, 4)) {
-		printk(KERN_ERR "MPTABLE: bad signature [%c%c%c%c]!\n",
+		pr_err("MPTABLE: bad signature [%c%c%c%c]!\n",
 		       mpc->signature[0], mpc->signature[1],
 		       mpc->signature[2], mpc->signature[3]);
 		return 0;
 	}
 	if (mpf_checksum((unsigned char *)mpc, mpc->length)) {
-		printk(KERN_ERR "MPTABLE: checksum error!\n");
+		pr_err("MPTABLE: checksum error!\n");
 		return 0;
 	}
 	if (mpc->spec != 0x01 && mpc->spec != 0x04) {
-		printk(KERN_ERR "MPTABLE: bad table version (%d)!!\n",
-		       mpc->spec);
+		pr_err("MPTABLE: bad table version (%d)!!\n", mpc->spec);
 		return 0;
 	}
 	if (!mpc->lapic) {
-		printk(KERN_ERR "MPTABLE: null local APIC address!\n");
+		pr_err("MPTABLE: null local APIC address!\n");
 		return 0;
 	}
 	memcpy(oem, mpc->oem, 8);
 	oem[8] = 0;
-	printk(KERN_INFO "MPTABLE: OEM ID: %s\n", oem);
+	pr_info("MPTABLE: OEM ID: %s\n", oem);
 
 	memcpy(str, mpc->productid, 12);
 	str[12] = 0;
 
-	printk(KERN_INFO "MPTABLE: Product ID: %s\n", str);
+	pr_info("MPTABLE: Product ID: %s\n", str);
 
-	printk(KERN_INFO "MPTABLE: APIC at: 0x%X\n", mpc->lapic);
+	pr_info("MPTABLE: APIC at: 0x%X\n", mpc->lapic);
 
 	return 1;
 }
@@ -188,8 +197,8 @@ static void skip_entry(unsigned char **ptr, int *count, int size)
 
 static void __init smp_dump_mptable(struct mpc_table *mpc, unsigned char *mpt)
 {
-	printk(KERN_ERR "Your mptable is wrong, contact your HW vendor!\n"
-		"type %x\n", *mpt);
+	pr_err("Your mptable is wrong, contact your HW vendor!\n");
+	pr_cont("type %x\n", *mpt);
 	print_hex_dump(KERN_ERR, "  ", DUMP_PREFIX_ADDRESS, 16,
 			1, mpc, mpc->length, 1);
 }
@@ -207,9 +216,6 @@ static int __init smp_read_mpc(struct mpc_table *mpc, unsigned early)
 	if (!smp_check_mpc(mpc, oem, str))
 		return 0;
 
-#ifdef CONFIG_X86_32
-	generic_mps_oem_check(mpc, oem, str);
-#endif
 	/* Initialize the lapic mapping */
 	if (!acpi_lapic)
 		register_lapic_address(mpc->lapic);
@@ -259,7 +265,7 @@ static int __init smp_read_mpc(struct mpc_table *mpc, unsigned early)
 	}
 
 	if (!num_processors)
-		printk(KERN_ERR "MPTABLE: no processors registered!\n");
+		pr_err("MPTABLE: no processors registered!\n");
 	return num_processors;
 }
 
@@ -295,16 +301,13 @@ static void __init construct_default_ioirq_mptable(int mpc_default_type)
 	 *  If it does, we assume it's valid.
 	 */
 	if (mpc_default_type == 5) {
-		printk(KERN_INFO "ISA/PCI bus type with no IRQ information... "
-		       "falling back to ELCR\n");
+		pr_info("ISA/PCI bus type with no IRQ information... falling back to ELCR\n");
 
 		if (ELCR_trigger(0) || ELCR_trigger(1) || ELCR_trigger(2) ||
 		    ELCR_trigger(13))
-			printk(KERN_ERR "ELCR contains invalid data... "
-			       "not using ELCR\n");
+			pr_err("ELCR contains invalid data... not using ELCR\n");
 		else {
-			printk(KERN_INFO
-			       "Using ELCR to identify PCI interrupts\n");
+			pr_info("Using ELCR to identify PCI interrupts\n");
 			ELCR_fallback = 1;
 		}
 	}
@@ -353,7 +356,7 @@ static void __init construct_ioapic_table(int mpc_default_type)
 	bus.busid = 0;
 	switch (mpc_default_type) {
 	default:
-		printk(KERN_ERR "???\nUnknown standard configuration %d\n",
+		pr_err("???\nUnknown standard configuration %d\n",
 		       mpc_default_type);
 		/* fall through */
 	case 1:
@@ -462,8 +465,8 @@ static int __init check_physptr(struct mpf_intel *mpf, unsigned int early)
 #ifdef CONFIG_X86_LOCAL_APIC
 		smp_found_config = 0;
 #endif
-		printk(KERN_ERR "BIOS bug, MP table errors detected!...\n"
-			"... disabling SMP support. (tell your hw vendor)\n");
+		pr_err("BIOS bug, MP table errors detected!...\n");
+		pr_cont("... disabling SMP support. (tell your hw vendor)\n");
 		early_iounmap(mpc, size);
 		return -1;
 	}
@@ -481,8 +484,7 @@ static int __init check_physptr(struct mpf_intel *mpf, unsigned int early)
 	if (!mp_irq_entries) {
 		struct mpc_bus bus;
 
-		printk(KERN_ERR "BIOS bug, no explicit IRQ entries, "
-		       "using default mptable. (tell your hw vendor)\n");
+		pr_err("BIOS bug, no explicit IRQ entries, using default mptable. (tell your hw vendor)\n");
 
 		bus.type = MP_BUS;
 		bus.busid = 0;
@@ -516,14 +518,14 @@ void __init default_get_smp_config(unsigned int early)
 	if (acpi_lapic && acpi_ioapic)
 		return;
 
-	printk(KERN_INFO "Intel MultiProcessor Specification v1.%d\n",
-	       mpf->specification);
+	pr_info("Intel MultiProcessor Specification v1.%d\n",
+		mpf->specification);
 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
 	if (mpf->feature2 & (1 << 7)) {
-		printk(KERN_INFO "    IMCR and PIC compatibility mode.\n");
+		pr_info("    IMCR and PIC compatibility mode.\n");
 		pic_mode = 1;
 	} else {
-		printk(KERN_INFO "    Virtual Wire compatibility mode.\n");
+		pr_info("    Virtual Wire compatibility mode.\n");
 		pic_mode = 0;
 	}
 #endif
@@ -539,8 +541,7 @@ void __init default_get_smp_config(unsigned int early)
 			return;
 		}
 
-		printk(KERN_INFO "Default MP configuration #%d\n",
-		       mpf->feature1);
+		pr_info("Default MP configuration #%d\n", mpf->feature1);
 		construct_default_ISA_mptable(mpf->feature1);
 
 	} else if (mpf->physptr) {
@@ -550,7 +551,7 @@ void __init default_get_smp_config(unsigned int early)
 		BUG();
 
 	if (!early)
-		printk(KERN_INFO "Processors: %d\n", num_processors);
+		pr_info("Processors: %d\n", num_processors);
 	/*
 	 * Only use the first configuration found.
 	 */
@@ -583,10 +584,10 @@ static int __init smp_scan_config(unsigned long base, unsigned long length)
 #endif
 			mpf_found = mpf;
 
-			printk(KERN_INFO "found SMP MP-table at [mem %#010llx-%#010llx] mapped at [%p]\n",
-			       (unsigned long long) virt_to_phys(mpf),
-			       (unsigned long long) virt_to_phys(mpf) +
-			       sizeof(*mpf) - 1, mpf);
+			pr_info("found SMP MP-table at [mem %#010llx-%#010llx] mapped at [%p]\n",
+				(unsigned long long) virt_to_phys(mpf),
+				(unsigned long long) virt_to_phys(mpf) +
+				sizeof(*mpf) - 1, mpf);
 
 			mem = virt_to_phys(mpf);
 			memblock_reserve(mem, sizeof(*mpf));
@@ -735,7 +736,7 @@ static int  __init replace_intsrc_all(struct mpc_table *mpc,
 	int nr_m_spare = 0;
 	unsigned char *mpt = ((unsigned char *)mpc) + count;
 
-	printk(KERN_INFO "mpc_length %x\n", mpc->length);
+	pr_info("mpc_length %x\n", mpc->length);
 	while (count < mpc->length) {
 		switch (*mpt) {
 		case MP_PROCESSOR:
@@ -862,13 +863,13 @@ static int __init update_mp_table(void)
 	if (!smp_check_mpc(mpc, oem, str))
 		return 0;
 
-	printk(KERN_INFO "mpf: %llx\n", (u64)virt_to_phys(mpf));
-	printk(KERN_INFO "physptr: %x\n", mpf->physptr);
+	pr_info("mpf: %llx\n", (u64)virt_to_phys(mpf));
+	pr_info("physptr: %x\n", mpf->physptr);
 
 	if (mpc_new_phys && mpc->length > mpc_new_length) {
 		mpc_new_phys = 0;
-		printk(KERN_INFO "mpc_new_length is %ld, please use alloc_mptable=8k\n",
-			 mpc_new_length);
+		pr_info("mpc_new_length is %ld, please use alloc_mptable=8k\n",
+			mpc_new_length);
 	}
 
 	if (!mpc_new_phys) {
@@ -879,10 +880,10 @@ static int __init update_mp_table(void)
 		mpc->checksum = 0xff;
 		new = mpf_checksum((unsigned char *)mpc, mpc->length);
 		if (old == new) {
-			printk(KERN_INFO "mpc is readonly, please try alloc_mptable instead\n");
+			pr_info("mpc is readonly, please try alloc_mptable instead\n");
 			return 0;
 		}
-		printk(KERN_INFO "use in-position replacing\n");
+		pr_info("use in-position replacing\n");
 	} else {
 		mpf->physptr = mpc_new_phys;
 		mpc_new = phys_to_virt(mpc_new_phys);
@@ -892,7 +893,7 @@ static int __init update_mp_table(void)
 		if (mpc_new_phys - mpf->physptr) {
 			struct mpf_intel *mpf_new;
 			/* steal 16 bytes from [0, 1k) */
-			printk(KERN_INFO "mpf new: %x\n", 0x400 - 16);
+			pr_info("mpf new: %x\n", 0x400 - 16);
 			mpf_new = phys_to_virt(0x400 - 16);
 			memcpy(mpf_new, mpf, 16);
 			mpf = mpf_new;
@@ -900,7 +901,7 @@ static int __init update_mp_table(void)
 		}
 		mpf->checksum = 0;
 		mpf->checksum -= mpf_checksum((unsigned char *)mpf, 16);
-		printk(KERN_INFO "physptr new: %x\n", mpf->physptr);
+		pr_info("physptr new: %x\n", mpf->physptr);
 	}
 
 	/*
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 5492798930e..2d872e08fab 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -168,10 +168,6 @@ static void smp_callin(void)
 	 * CPU, first the APIC. (this is probably redundant on most
 	 * boards)
 	 */
-
-	pr_debug("CALLIN, before setup_local_APIC()\n");
-	if (apic->smp_callin_clear_local_apic)
-		apic->smp_callin_clear_local_apic();
 	setup_local_APIC();
 	end_local_APIC_setup();
 
@@ -1143,10 +1139,6 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus)
 		enable_IO_APIC();
 
 	bsp_end_local_APIC_setup();
-
-	if (apic->setup_portio_remap)
-		apic->setup_portio_remap();
-
 	smpboot_setup_io_apic();
 	/*
 	 * Set up local APIC timer on boot CPU.
diff --git a/arch/x86/kernel/vsmp_64.c b/arch/x86/kernel/vsmp_64.c
index b99b9ad8540..ee22c1d93ae 100644
--- a/arch/x86/kernel/vsmp_64.c
+++ b/arch/x86/kernel/vsmp_64.c
@@ -152,7 +152,7 @@ static void __init detect_vsmp_box(void)
 		is_vsmp = 1;
 }
 
-int is_vsmp_box(void)
+static int is_vsmp_box(void)
 {
 	if (is_vsmp != -1)
 		return is_vsmp;
@@ -166,7 +166,7 @@ int is_vsmp_box(void)
 static void __init detect_vsmp_box(void)
 {
 }
-int is_vsmp_box(void)
+static int is_vsmp_box(void)
 {
 	return 0;
 }