Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
Merge commit. Changes below are compared with the first parent: 15a3d11b.
Changes
20 files changed · +539 −563
Only the first 600 diff lines are shown. Download the complete patch.
arch/x86/include/asm/apic.h
View filediff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index a0c46f0..4a0b7c7 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -381,6 +381,26 @@ struct apic {
extern struct apic *apic;
/*
+ * APIC drivers are probed based on how they are listed in the .apicdrivers
+ * section. So the order is important and enforced by the ordering
+ * of different apic driver files in the Makefile.
+ *
+ * For the files having two apic drivers, we use apic_drivers()
+ * to enforce the order with in them.
+ */
+#define apic_driver(sym) \
+ static struct apic *__apicdrivers_##sym __used \
+ __aligned(sizeof(struct apic *)) \
+ __section(.apicdrivers) = { &sym }
+
+#define apic_drivers(sym1, sym2) \
+ static struct apic *__apicdrivers_##sym1##sym2[2] __used \
+ __aligned(sizeof(struct apic *)) \
+ __section(.apicdrivers) = { &sym1, &sym2 }
+
+extern struct apic *__apicdrivers[], *__apicdrivers_end[];
+
+/*
* APIC functionality to boot other CPUs - only used on SMP:
*/
#ifdef CONFIG_SMP
@@ -458,15 +478,10 @@ static inline unsigned default_get_apic_id(unsigned long x)
#define DEFAULT_TRAMPOLINE_PHYS_HIGH 0x469
#ifdef CONFIG_X86_64
-extern struct apic apic_flat;
-extern struct apic apic_physflat;
-extern struct apic apic_x2apic_cluster;
-extern struct apic apic_x2apic_phys;
extern int default_acpi_madt_oem_check(char *, char *);
extern void apic_send_IPI_self(int vector);
-extern struct apic apic_x2apic_uv_x;
DECLARE_PER_CPU(int, x2apic_extra_bits);
extern int default_cpu_present_to_apicid(int mps_cpu);
@@ -480,7 +495,7 @@ static inline void default_wait_for_init_deassert(atomic_t *deassert)
return;
}
-extern void generic_bigsmp_probe(void);
+extern struct apic *generic_bigsmp_probe(void);
#ifdef CONFIG_X86_LOCAL_APIC
@@ -516,8 +531,6 @@ extern struct apic apic_noop;
#ifdef CONFIG_X86_32
-extern struct apic apic_default;
-
static inline int noop_x86_32_early_logical_apicid(int cpu)
{
return BAD_APICID;
arch/x86/include/asm/io_apic.h
View filediff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.h
index a97a240..690d1cc 100644
--- a/arch/x86/include/asm/io_apic.h
+++ b/arch/x86/include/asm/io_apic.h
@@ -105,12 +105,12 @@ struct IR_IO_APIC_route_entry {
* # of IO-APICs and # of IRQ routing registers
*/
extern int nr_ioapics;
-extern int nr_ioapic_registers[MAX_IO_APICS];
-#define MP_MAX_IOAPIC_PIN 127
+extern int mpc_ioapic_id(int ioapic);
+extern unsigned int mpc_ioapic_addr(int ioapic);
+extern struct mp_ioapic_gsi *mp_ioapic_gsi_routing(int ioapic);
-/* I/O APIC entries */
-extern struct mpc_ioapic mp_ioapics[MAX_IO_APICS];
+#define MP_MAX_IOAPIC_PIN 127
/* # of MP IRQ source entries */
extern int mp_irq_entries;
@@ -152,11 +152,9 @@ extern void ioapic_insert_resources(void);
int io_apic_setup_irq_pin_once(unsigned int irq, int node, struct io_apic_irq_attr *attr);
-extern struct IO_APIC_route_entry **alloc_ioapic_entries(void);
-extern void free_ioapic_entries(struct IO_APIC_route_entry **ioapic_entries);
-extern int save_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries);
-extern void mask_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries);
-extern int restore_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries);
+extern int save_ioapic_entries(void);
+extern void mask_ioapic_entries(void);
+extern int restore_ioapic_entries(void);
extern int get_nr_irqs_gsi(void);
@@ -192,19 +190,13 @@ struct io_apic_irq_attr;
static inline int io_apic_set_pci_routing(struct device *dev, int irq,
struct io_apic_irq_attr *irq_attr) { return 0; }
-static inline struct IO_APIC_route_entry **alloc_ioapic_entries(void)
-{
- return NULL;
-}
-
-static inline void free_ioapic_entries(struct IO_APIC_route_entry **ent) { }
-static inline int save_IO_APIC_setup(struct IO_APIC_route_entry **ent)
+static inline int save_ioapic_entries(void)
{
return -ENOMEM;
}
-static inline void mask_IO_APIC_setup(struct IO_APIC_route_entry **ent) { }
-static inline int restore_IO_APIC_setup(struct IO_APIC_route_entry **ent)
+static inline void mask_ioapic_entries(void) { }
+static inline int restore_ioapic_entries(void)
{
return -ENOMEM;
}
arch/x86/include/asm/x2apic.h
View filediff --git a/arch/x86/include/asm/x2apic.h b/arch/x86/include/asm/x2apic.h
new file mode 100644
index 0000000..6bf5b8e
--- /dev/null
+++ b/arch/x86/include/asm/x2apic.h
@@ -0,0 +1,62 @@
+/*
+ * Common bits for X2APIC cluster/physical modes.
+ */
+
+#ifndef _ASM_X86_X2APIC_H
+#define _ASM_X86_X2APIC_H
+
+#include <asm/apic.h>
+#include <asm/ipi.h>
+#include <linux/cpumask.h>
+
+/*
+ * Need to use more than cpu 0, because we need more vectors
+ * when MSI-X are used.
+ */
+static const struct cpumask *x2apic_target_cpus(void)
+{
+ return cpu_online_mask;
+}
+
+static int x2apic_apic_id_registered(void)
+{
+ return 1;
+}
+
+/*
+ * For now each logical cpu is in its own vector allocation domain.
+ */
+static void x2apic_vector_allocation_domain(int cpu, struct cpumask *retmask)
+{
+ cpumask_clear(retmask);
+ cpumask_set_cpu(cpu, retmask);
+}
+
+static void
+__x2apic_send_IPI_dest(unsigned int apicid, int vector, unsigned int dest)
+{
+ unsigned long cfg = __prepare_ICR(0, vector, dest);
+ native_x2apic_icr_write(cfg, apicid);
+}
+
+static unsigned int x2apic_get_apic_id(unsigned long id)
+{
+ return id;
+}
+
+static unsigned long x2apic_set_apic_id(unsigned int id)
+{
+ return id;
+}
+
+static int x2apic_phys_pkg_id(int initial_apicid, int index_msb)
+{
+ return initial_apicid >> index_msb;
+}
+
+static void x2apic_send_IPI_self(int vector)
+{
+ apic_write(APIC_SELF_IPI, vector);
+}
+
+#endif /* _ASM_X86_X2APIC_H */
arch/x86/kernel/acpi/boot.c
View filediff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 9a966c5..4558f0d 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -970,7 +970,7 @@ void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
mp_irq.irqflag = (trigger << 2) | polarity;
mp_irq.srcbus = MP_ISA_BUS;
mp_irq.srcbusirq = bus_irq; /* IRQ */
- mp_irq.dstapic = mp_ioapics[ioapic].apicid; /* APIC ID */
+ mp_irq.dstapic = mpc_ioapic_id(ioapic); /* APIC ID */
mp_irq.dstirq = pin; /* INTIN# */
mp_save_irq(&mp_irq);
@@ -1021,7 +1021,7 @@ void __init mp_config_acpi_legacy_irqs(void)
if (ioapic < 0)
continue;
pin = mp_find_ioapic_pin(ioapic, gsi);
- dstapic = mp_ioapics[ioapic].apicid;
+ dstapic = mpc_ioapic_id(ioapic);
for (idx = 0; idx < mp_irq_entries; idx++) {
struct mpc_intsrc *irq = mp_irqs + idx;
@@ -1082,7 +1082,7 @@ static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
mp_irq.srcbus = number;
mp_irq.srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
ioapic = mp_find_ioapic(gsi);
- mp_irq.dstapic = mp_ioapics[ioapic].apicid;
+ mp_irq.dstapic = mpc_ioapic_id(ioapic);
mp_irq.dstirq = mp_find_ioapic_pin(ioapic, gsi);
mp_save_irq(&mp_irq);
@@ -1113,7 +1113,7 @@ int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
printk(KERN_ERR "Invalid reference to IOAPIC pin "
- "%d-%d\n", mp_ioapics[ioapic].apicid,
+ "%d-%d\n", mpc_ioapic_id(ioapic),
ioapic_pin);
return gsi;
}
arch/x86/kernel/apic/Makefile
View filediff --git a/arch/x86/kernel/apic/Makefile b/arch/x86/kernel/apic/Makefile
index 3966b56..767fd04 100644
--- a/arch/x86/kernel/apic/Makefile
+++ b/arch/x86/kernel/apic/Makefile
@@ -2,20 +2,25 @@
# Makefile for local APIC drivers and for the IO-APIC code
#
-obj-$(CONFIG_X86_LOCAL_APIC) += apic.o apic_noop.o probe_$(BITS).o ipi.o
+obj-$(CONFIG_X86_LOCAL_APIC) += apic.o apic_noop.o ipi.o
obj-y += hw_nmi.o
obj-$(CONFIG_X86_IO_APIC) += io_apic.o
obj-$(CONFIG_SMP) += ipi.o
ifeq ($(CONFIG_X86_64),y)
-obj-y += apic_flat_64.o
-obj-$(CONFIG_X86_X2APIC) += x2apic_cluster.o
-obj-$(CONFIG_X86_X2APIC) += x2apic_phys.o
+# APIC probe will depend on the listing order here
obj-$(CONFIG_X86_UV) += x2apic_uv_x.o
+obj-$(CONFIG_X86_X2APIC) += x2apic_phys.o
+obj-$(CONFIG_X86_X2APIC) += x2apic_cluster.o
+obj-y += apic_flat_64.o
endif
-obj-$(CONFIG_X86_BIGSMP) += bigsmp_32.o
+# APIC probe will depend on the listing order here
obj-$(CONFIG_X86_NUMAQ) += numaq_32.o
-obj-$(CONFIG_X86_ES7000) += es7000_32.o
obj-$(CONFIG_X86_SUMMIT) += summit_32.o
+obj-$(CONFIG_X86_BIGSMP) += bigsmp_32.o
+obj-$(CONFIG_X86_ES7000) += es7000_32.o
+
+# For 32bit, probe_32 need to be listed last
+obj-$(CONFIG_X86_LOCAL_APIC) += probe_$(BITS).o
arch/x86/kernel/apic/apic.c
View filediff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index f92a8e5..b961af8 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1461,7 +1461,6 @@ int __init enable_IR(void)
void __init enable_IR_x2apic(void)
{
unsigned long flags;
- struct IO_APIC_route_entry **ioapic_entries;
int ret, x2apic_enabled = 0;
int dmar_table_init_ret;
@@ -1469,13 +1468,7 @@ void __init enable_IR_x2apic(void)
if (dmar_table_init_ret && !x2apic_supported())
return;
- ioapic_entries = alloc_ioapic_entries();
- if (!ioapic_entries) {
- pr_err("Allocate ioapic_entries failed\n");
- goto out;
- }
-
- ret = save_IO_APIC_setup(ioapic_entries);
+ ret = save_ioapic_entries();
if (ret) {
pr_info("Saving IO-APIC state failed: %d\n", ret);
goto out;
@@ -1483,7 +1476,7 @@ void __init enable_IR_x2apic(void)
local_irq_save(flags);
legacy_pic->mask_all();
- mask_IO_APIC_setup(ioapic_entries);
+ mask_ioapic_entries();
if (dmar_table_init_ret)
ret = 0;
@@ -1514,14 +1507,11 @@ void __init enable_IR_x2apic(void)
nox2apic:
if (!ret) /* IR enabling failed */
- restore_IO_APIC_setup(ioapic_entries);
+ restore_ioapic_entries();
legacy_pic->restore_mask();
local_irq_restore(flags);
out:
- if (ioapic_entries)
- free_ioapic_entries(ioapic_entries);
-
if (x2apic_enabled)
return;
@@ -2095,28 +2085,20 @@ static void lapic_resume(void)
{
unsigned int l, h;
unsigned long flags;
- int maxlvt, ret;
- struct IO_APIC_route_entry **ioapic_entries = NULL;
+ int maxlvt;
if (!apic_pm_state.active)
return;
local_irq_save(flags);
if (intr_remapping_enabled) {
- ioapic_entries = alloc_ioapic_entries();
- if (!ioapic_entries) {
- WARN(1, "Alloc ioapic_entries in lapic resume failed.");
- goto restore;
- }
-
- ret = save_IO_APIC_setup(ioapic_entries);
- if (ret) {
- WARN(1, "Saving IO-APIC state failed: %d\n", ret);
- free_ioapic_entries(ioapic_entries);
- goto restore;
- }
-
- mask_IO_APIC_setup(ioapic_entries);
+ /*
+ * IO-APIC and PIC have their own resume routines.
+ * We just mask them here to make sure the interrupt
+ * subsystem is completely quiet while we enable x2apic
+ * and interrupt-remapping.
+ */
+ mask_ioapic_entries();
legacy_pic->mask_all();
}
@@ -2159,13 +2141,9 @@ static void lapic_resume(void)
apic_write(APIC_ESR, 0);
apic_read(APIC_ESR);
- if (intr_remapping_enabled) {
+ if (intr_remapping_enabled)
reenable_intr_remapping(x2apic_mode);
- legacy_pic->restore_mask();
- restore_IO_APIC_setup(ioapic_entries);
- free_ioapic_entries(ioapic_entries);
- }
-restore:
+
local_irq_restore(flags);
}
arch/x86/kernel/apic/apic_flat_64.c
View filediff --git a/arch/x86/kernel/apic/apic_flat_64.c b/arch/x86/kernel/apic/apic_flat_64.c
index 5652d31..f7a41e4 100644
--- a/arch/x86/kernel/apic/apic_flat_64.c
+++ b/arch/x86/kernel/apic/apic_flat_64.c
@@ -16,6 +16,7 @@
#include <linux/ctype.h>
#include <linux/init.h>
#include <linux/hardirq.h>
+#include <linux/module.h>
#include <asm/smp.h>
#include <asm/apic.h>
#include <asm/ipi.h>
@@ -24,6 +25,12 @@
#include <acpi/acpi_bus.h>
#endif
+static struct apic apic_physflat;
+static struct apic apic_flat;
+
+struct apic __read_mostly *apic = &apic_flat;
+EXPORT_SYMBOL_GPL(apic);
+
static int flat_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
return 1;
@@ -164,7 +171,7 @@ static int flat_phys_pkg_id(int initial_apic_id, int index_msb)
return initial_apic_id >> index_msb;
}
-struct apic apic_flat = {
+static struct apic apic_flat = {
.name = "flat",
.probe = NULL,
.acpi_madt_oem_check = flat_acpi_madt_oem_check,
@@ -312,10 +319,18 @@ physflat_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
return per_cpu(x86_cpu_to_apicid, cpu);
}
-struct apic apic_physflat = {
+static int physflat_probe(void)
+{
+ if (apic == &apic_physflat || num_possible_cpus() > 8)
+ return 1;
+
+ return 0;
+}
+
+static struct apic apic_physflat = {
.name = "physical flat",
- .probe = NULL,
+ .probe = physflat_probe,
.acpi_madt_oem_check = physflat_acpi_madt_oem_check,
.apic_id_registered = flat_apic_id_registered,
@@ -369,3 +384,8 @@ struct apic apic_physflat = {
.wait_icr_idle = native_apic_wait_icr_idle,
.safe_wait_icr_idle = native_safe_apic_wait_icr_idle,
};
+
+/*
+ * We need to check for physflat first, so this order is important.
+ */
+apic_drivers(apic_physflat, apic_flat);
arch/x86/kernel/apic/bigsmp_32.c
View filediff --git a/arch/x86/kernel/apic/bigsmp_32.c b/arch/x86/kernel/apic/bigsmp_32.c
index d84ac5a..efd737e 100644
--- a/arch/x86/kernel/apic/bigsmp_32.c
+++ b/arch/x86/kernel/apic/bigsmp_32.c
@@ -193,7 +193,7 @@ static int probe_bigsmp(void)
return dmi_bigsmp;
}
-struct apic apic_bigsmp = {
+static struct apic apic_bigsmp = {
.name = "bigsmp",
.probe = probe_bigsmp,
@@ -254,3 +254,13 @@ struct apic apic_bigsmp = {
.x86_32_early_logical_apicid = bigsmp_early_logical_apicid,
};
+
+struct apic * __init generic_bigsmp_probe(void)
+{
+ if (probe_bigsmp())
+ return &apic_bigsmp;
+
+ return NULL;
+}
+
+apic_driver(apic_bigsmp);
arch/x86/kernel/apic/es7000_32.c
View filediff --git a/arch/x86/kernel/apic/es7000_32.c b/arch/x86/kernel/apic/es7000_32.c
index 70533de..9536b3f 100644
--- a/arch/x86/kernel/apic/es7000_32.c
+++ b/arch/x86/kernel/apic/es7000_32.c
@@ -620,7 +620,7 @@ static int es7000_mps_oem_check_cluster(struct mpc_table *mpc, char *oem,
}
/* We've been warned by a false positive warning.Use __refdata to keep calm. */
-struct apic __refdata apic_es7000_cluster = {
+static struct apic __refdata apic_es7000_cluster = {
.name = "es7000",
.probe = probe_es7000,
@@ -685,7 +685,7 @@ struct apic __refdata apic_es7000_cluster = {
.x86_32_early_logical_apicid = es7000_early_logical_apicid,
};
-struct apic __refdata apic_es7000 = {
+static struct apic __refdata apic_es7000 = {
.name = "es7000",
.probe = probe_es7000,
@@ -747,3 +747,9 @@ struct apic __refdata apic_es7000 = {
.x86_32_early_logical_apicid = es7000_early_logical_apicid,
};
+
+/*
+ * Need to check for es7000 followed by es7000_cluster, so this order
+ * in apic_drivers is important.
+ */
+apic_drivers(apic_es7000, apic_es7000_cluster);
arch/x86/kernel/apic/io_apic.c
View filediff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 45fd33d..9488dcf 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -76,17 +76,40 @@ int sis_apic_bug = -1;
static DEFINE_RAW_SPINLOCK(ioapic_lock);
static DEFINE_RAW_SPINLOCK(vector_lock);
-/*
- * # of IRQ routing registers
- */
-int nr_ioapic_registers[MAX_IO_APICS];
+static struct ioapic {
+ /*
+ * # of IRQ routing registers
+ */
+ int nr_registers;
+ /*
+ * Saved state during suspend/resume, or while enabling intr-remap.
+ */
+ struct IO_APIC_route_entry *saved_registers;
+ /* I/O APIC config */
+ 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);
+} ioapics[MAX_IO_APICS];
-/* I/O APIC entries */
-struct mpc_ioapic mp_ioapics[MAX_IO_APICS];
-int nr_ioapics;
+#define mpc_ioapic_ver(id) ioapics[id].mp_config.apicver
+
+int mpc_ioapic_id(int id)
+{
+ return ioapics[id].mp_config.apicid;
+}
-/* IO APIC gsi routing info */
-struct mp_ioapic_gsi mp_gsi_routing[MAX_IO_APICS];
+unsigned int mpc_ioapic_addr(int id)
+{
+ return ioapics[id].mp_config.apicaddr;
+}
+
+struct mp_ioapic_gsi *mp_ioapic_gsi_routing(int id)
+{
+ return &ioapics[id].gsi_config;
+}
+
+int nr_ioapics;
/* The one past the highest gsi number used */
u32 gsi_top;
@@ -179,6 +202,14 @@ int __init arch_early_irq_init(void)
io_apic_irqs = ~0UL;
}
+ for (i = 0; i < nr_ioapics; i++) {
+ ioapics[i].saved_registers =
+ kzalloc(sizeof(struct IO_APIC_route_entry) *
+ ioapics[i].nr_registers, GFP_KERNEL);
+ if (!ioapics[i].saved_registers)
+ pr_err("IOAPIC %d: suspend/resume impossible!\n", i);
+ }
+
cfg = irq_cfgx;
count = ARRAY_SIZE(irq_cfgx);
node = cpu_to_node(0);
@@ -297,7 +328,7 @@ struct io_apic {
static __attribute_const__ struct io_apic __iomem *io_apic_base(int idx)
{
return (void __iomem *) __fix_to_virt(FIX_IO_APIC_BASE_0 + idx)
- + (mp_ioapics[idx].apicaddr & ~PAGE_MASK);
+ + (mpc_ioapic_addr(idx) & ~PAGE_MASK);
}
static inline void io_apic_eoi(unsigned int apic, unsigned int vector)
@@ -573,7 +604,7 @@ static void clear_IO_APIC (void)
int apic, pin;
for (apic = 0; apic < nr_ioapics; apic++)
- for (pin = 0; pin < nr_ioapic_registers[apic]; pin++)
+ for (pin = 0; pin < ioapics[apic].nr_registers; pin++)
clear_IO_APIC_pin(apic, pin);
}
@@ -615,74 +646,43 @@ static int __init ioapic_pirq_setup(char *str)
__setup("pirq=", ioapic_pirq_setup);
#endif /* CONFIG_X86_32 */
-struct IO_APIC_route_entry **alloc_ioapic_entries(void)
-{
- int apic;
- struct IO_APIC_route_entry **ioapic_entries;
-
- ioapic_entries = kzalloc(sizeof(*ioapic_entries) * nr_ioapics,
- GFP_KERNEL);
- if (!ioapic_entries)
- return 0;
-
- for (apic = 0; apic < nr_ioapics; apic++) {
- ioapic_entries[apic] =
- kzalloc(sizeof(struct IO_APIC_route_entry) *
This diff is incomplete. Download the complete patch.
arch/x86/kernel/apic/numaq_32.c
View fileThis diff is incomplete. Download the complete patch.
arch/x86/kernel/apic/probe_32.c
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arch/x86/kernel/apic/probe_64.c
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arch/x86/kernel/apic/summit_32.c
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arch/x86/kernel/apic/x2apic_cluster.c
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arch/x86/kernel/apic/x2apic_phys.c
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arch/x86/kernel/apic/x2apic_uv_x.c
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arch/x86/kernel/devicetree.c
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arch/x86/kernel/mpparse.c
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arch/x86/kernel/vmlinux.lds.S
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