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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2007-06-07 09:35:54 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-06-07 09:35:54 -0700
commit7244d545c123ff33a3a5bff7fcb96a07778c32d1 (patch)
treec4d2893faa844e4cd6e2b47bbd2663dc28d9af83 /arch/sparc64
parent143a275984b37058d2d3ab1ec0e5be9026fda24d (diff)
parente7e8cc5ae63c39dbbbb5f14c5120bdf2d931fac9 (diff)
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6
* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6: [VIDEO] sunxvr500fb: Fix pseudo_palette array size [VIDEO] sunxvr2500fb: Fix pseudo_palette array size [VIDEO] ffb: The pseudo_palette is only 16 elements long [VIDEO]: Fix section mismatch warning in promcon. [ATA]: Back out bogus (SPARC64 && !PCI) Kconfig depends. [SPARC64]: Fill in gaps in non-PCI dma_*() NOP implementation. [SPARC64]: Fix {mc,smt}_capable(). [SPARC64]: Make core and sibling groups equal on UltraSPARC-IV. [SPARC64]: Proper multi-core scheduling support. [SPARC64]: Provide mmu statistics via sysfs. [SPARC64]: Fix service channel hypervisor function names. [SPARC64]: Export basic cpu properties via sysfs. [SPARC64]: Move topology init code into new file, sysfs.c
Diffstat (limited to 'arch/sparc64')
-rw-r--r--arch/sparc64/Kconfig9
-rw-r--r--arch/sparc64/kernel/Makefile4
-rw-r--r--arch/sparc64/kernel/entry.S62
-rw-r--r--arch/sparc64/kernel/mdesc.c53
-rw-r--r--arch/sparc64/kernel/prom.c5
-rw-r--r--arch/sparc64/kernel/setup.c19
-rw-r--r--arch/sparc64/kernel/smp.c21
-rw-r--r--arch/sparc64/kernel/sysfs.c297
8 files changed, 428 insertions, 42 deletions
diff --git a/arch/sparc64/Kconfig b/arch/sparc64/Kconfig
index bd00f89eed1..89a1b469b93 100644
--- a/arch/sparc64/Kconfig
+++ b/arch/sparc64/Kconfig
@@ -396,6 +396,15 @@ config SCHED_SMT
when dealing with UltraSPARC cpus at a cost of slightly increased
overhead in some places. If unsure say N here.
+config SCHED_MC
+ bool "Multi-core scheduler support"
+ depends on SMP
+ default y
+ help
+ Multi-core scheduler support improves the CPU scheduler's decision
+ making when dealing with multi-core CPU chips at a cost of slightly
+ increased overhead in some places. If unsure say N here.
+
source "kernel/Kconfig.preempt"
config CMDLINE_BOOL
diff --git a/arch/sparc64/kernel/Makefile b/arch/sparc64/kernel/Makefile
index d8d19093d12..f964bf28d21 100644
--- a/arch/sparc64/kernel/Makefile
+++ b/arch/sparc64/kernel/Makefile
@@ -1,4 +1,4 @@
-# $Id: Makefile,v 1.70 2002/02/09 19:49:30 davem Exp $
+#
# Makefile for the linux kernel.
#
@@ -8,7 +8,7 @@ EXTRA_CFLAGS := -Werror
extra-y := head.o init_task.o vmlinux.lds
obj-y := process.o setup.o cpu.o idprom.o \
- traps.o auxio.o una_asm.o \
+ traps.o auxio.o una_asm.o sysfs.o \
irq.o ptrace.o time.o sys_sparc.o signal.o \
unaligned.o central.o pci.o starfire.o semaphore.o \
power.o sbus.o iommu_common.o sparc64_ksyms.o chmc.o \
diff --git a/arch/sparc64/kernel/entry.S b/arch/sparc64/kernel/entry.S
index ed712e0b337..7d1a11822a1 100644
--- a/arch/sparc64/kernel/entry.S
+++ b/arch/sparc64/kernel/entry.S
@@ -2514,9 +2514,9 @@ sun4v_ncs_request:
nop
.size sun4v_ncs_request, .-sun4v_ncs_request
- .globl sun4v_scv_send
- .type sun4v_scv_send,#function
-sun4v_scv_send:
+ .globl sun4v_svc_send
+ .type sun4v_svc_send,#function
+sun4v_svc_send:
save %sp, -192, %sp
mov %i0, %o0
mov %i1, %o1
@@ -2526,11 +2526,11 @@ sun4v_scv_send:
stx %o1, [%i3]
ret
restore
- .size sun4v_scv_send, .-sun4v_scv_send
+ .size sun4v_svc_send, .-sun4v_svc_send
- .globl sun4v_scv_recv
- .type sun4v_scv_recv,#function
-sun4v_scv_recv:
+ .globl sun4v_svc_recv
+ .type sun4v_svc_recv,#function
+sun4v_svc_recv:
save %sp, -192, %sp
mov %i0, %o0
mov %i1, %o1
@@ -2540,33 +2540,55 @@ sun4v_scv_recv:
stx %o1, [%i3]
ret
restore
- .size sun4v_scv_recv, .-sun4v_scv_recv
+ .size sun4v_svc_recv, .-sun4v_svc_recv
- .globl sun4v_scv_getstatus
- .type sun4v_scv_getstatus,#function
-sun4v_scv_getstatus:
+ .globl sun4v_svc_getstatus
+ .type sun4v_svc_getstatus,#function
+sun4v_svc_getstatus:
mov HV_FAST_SVC_GETSTATUS, %o5
mov %o1, %o4
ta HV_FAST_TRAP
stx %o1, [%o4]
retl
nop
- .size sun4v_scv_getstatus, .-sun4v_scv_getstatus
+ .size sun4v_svc_getstatus, .-sun4v_svc_getstatus
- .globl sun4v_scv_setstatus
- .type sun4v_scv_setstatus,#function
-sun4v_scv_setstatus:
+ .globl sun4v_svc_setstatus
+ .type sun4v_svc_setstatus,#function
+sun4v_svc_setstatus:
mov HV_FAST_SVC_SETSTATUS, %o5
ta HV_FAST_TRAP
retl
nop
- .size sun4v_scv_setstatus, .-sun4v_scv_setstatus
+ .size sun4v_svc_setstatus, .-sun4v_svc_setstatus
- .globl sun4v_scv_clrstatus
- .type sun4v_scv_clrstatus,#function
-sun4v_scv_clrstatus:
+ .globl sun4v_svc_clrstatus
+ .type sun4v_svc_clrstatus,#function
+sun4v_svc_clrstatus:
mov HV_FAST_SVC_CLRSTATUS, %o5
ta HV_FAST_TRAP
retl
nop
- .size sun4v_scv_clrstatus, .-sun4v_scv_clrstatus
+ .size sun4v_svc_clrstatus, .-sun4v_svc_clrstatus
+
+ .globl sun4v_mmustat_conf
+ .type sun4v_mmustat_conf,#function
+sun4v_mmustat_conf:
+ mov %o1, %o4
+ mov HV_FAST_MMUSTAT_CONF, %o5
+ ta HV_FAST_TRAP
+ stx %o1, [%o4]
+ retl
+ nop
+ .size sun4v_mmustat_conf, .-sun4v_mmustat_conf
+
+ .globl sun4v_mmustat_info
+ .type sun4v_mmustat_info,#function
+sun4v_mmustat_info:
+ mov %o0, %o4
+ mov HV_FAST_MMUSTAT_INFO, %o5
+ ta HV_FAST_TRAP
+ stx %o1, [%o4]
+ retl
+ nop
+ .size sun4v_mmustat_info, .-sun4v_mmustat_info
diff --git a/arch/sparc64/kernel/mdesc.c b/arch/sparc64/kernel/mdesc.c
index 9246c2cf957..f0e16045fb1 100644
--- a/arch/sparc64/kernel/mdesc.c
+++ b/arch/sparc64/kernel/mdesc.c
@@ -473,6 +473,53 @@ static void __init set_core_ids(void)
}
}
+static void __init mark_proc_ids(struct mdesc_node *mp, int proc_id)
+{
+ int i;
+
+ for (i = 0; i < mp->num_arcs; i++) {
+ struct mdesc_node *t = mp->arcs[i].arc;
+ const u64 *id;
+
+ if (strcmp(mp->arcs[i].name, "back"))
+ continue;
+
+ if (strcmp(t->name, "cpu"))
+ continue;
+
+ id = md_get_property(t, "id", NULL);
+ if (*id < NR_CPUS)
+ cpu_data(*id).proc_id = proc_id;
+ }
+}
+
+static void __init __set_proc_ids(const char *exec_unit_name)
+{
+ struct mdesc_node *mp;
+ int idx;
+
+ idx = 0;
+ md_for_each_node_by_name(mp, exec_unit_name) {
+ const char *type;
+ int len;
+
+ type = md_get_property(mp, "type", &len);
+ if (!find_in_proplist(type, "int", len) &&
+ !find_in_proplist(type, "integer", len))
+ continue;
+
+ mark_proc_ids(mp, idx);
+
+ idx++;
+ }
+}
+
+static void __init set_proc_ids(void)
+{
+ __set_proc_ids("exec_unit");
+ __set_proc_ids("exec-unit");
+}
+
static void __init get_one_mondo_bits(const u64 *p, unsigned int *mask, unsigned char def)
{
u64 val;
@@ -574,9 +621,15 @@ static void __init mdesc_fill_in_cpu_data(void)
#endif
c->core_id = 0;
+ c->proc_id = -1;
}
+#ifdef CONFIG_SMP
+ sparc64_multi_core = 1;
+#endif
+
set_core_ids();
+ set_proc_ids();
smp_fill_in_sib_core_maps();
}
diff --git a/arch/sparc64/kernel/prom.c b/arch/sparc64/kernel/prom.c
index dad4b3ba705..6f4a5284b0e 100644
--- a/arch/sparc64/kernel/prom.c
+++ b/arch/sparc64/kernel/prom.c
@@ -1781,6 +1781,10 @@ static void __init of_fill_in_cpu_data(void)
}
cpu_data(cpuid).core_id = portid + 1;
+ cpu_data(cpuid).proc_id = portid;
+#ifdef CONFIG_SMP
+ sparc64_multi_core = 1;
+#endif
} else {
cpu_data(cpuid).dcache_size =
of_getintprop_default(dp, "dcache-size", 16 * 1024);
@@ -1799,6 +1803,7 @@ static void __init of_fill_in_cpu_data(void)
of_getintprop_default(dp, "ecache-line-size", 64);
cpu_data(cpuid).core_id = 0;
+ cpu_data(cpuid).proc_id = -1;
}
#ifdef CONFIG_SMP
diff --git a/arch/sparc64/kernel/setup.c b/arch/sparc64/kernel/setup.c
index de9b4c13f1c..7490cc670a5 100644
--- a/arch/sparc64/kernel/setup.c
+++ b/arch/sparc64/kernel/setup.c
@@ -513,22 +513,3 @@ void sun_do_break(void)
int serial_console = -1;
int stop_a_enabled = 1;
-
-static int __init topology_init(void)
-{
- int i, err;
-
- err = -ENOMEM;
-
- for_each_possible_cpu(i) {
- struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL);
- if (p) {
- register_cpu(p, i);
- err = 0;
- }
- }
-
- return err;
-}
-
-subsys_initcall(topology_init);
diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index c550bba3490..4dcd7d0b60f 100644
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -44,6 +44,8 @@
extern void calibrate_delay(void);
+int sparc64_multi_core __read_mostly;
+
/* Please don't make this stuff initdata!!! --DaveM */
unsigned char boot_cpu_id;
@@ -51,6 +53,8 @@ cpumask_t cpu_online_map __read_mostly = CPU_MASK_NONE;
cpumask_t phys_cpu_present_map __read_mostly = CPU_MASK_NONE;
cpumask_t cpu_sibling_map[NR_CPUS] __read_mostly =
{ [0 ... NR_CPUS-1] = CPU_MASK_NONE };
+cpumask_t cpu_core_map[NR_CPUS] __read_mostly =
+ { [0 ... NR_CPUS-1] = CPU_MASK_NONE };
static cpumask_t smp_commenced_mask;
static cpumask_t cpu_callout_map;
@@ -1217,13 +1221,28 @@ void __devinit smp_fill_in_sib_core_maps(void)
unsigned int j;
if (cpu_data(i).core_id == 0) {
- cpu_set(i, cpu_sibling_map[i]);
+ cpu_set(i, cpu_core_map[i]);
continue;
}
for_each_possible_cpu(j) {
if (cpu_data(i).core_id ==
cpu_data(j).core_id)
+ cpu_set(j, cpu_core_map[i]);
+ }
+ }
+
+ for_each_possible_cpu(i) {
+ unsigned int j;
+
+ if (cpu_data(i).proc_id == -1) {
+ cpu_set(i, cpu_sibling_map[i]);
+ continue;
+ }
+
+ for_each_possible_cpu(j) {
+ if (cpu_data(i).proc_id ==
+ cpu_data(j).proc_id)
cpu_set(j, cpu_sibling_map[i]);
}
}
diff --git a/arch/sparc64/kernel/sysfs.c b/arch/sparc64/kernel/sysfs.c
new file mode 100644
index 00000000000..cdb1477af89
--- /dev/null
+++ b/arch/sparc64/kernel/sysfs.c
@@ -0,0 +1,297 @@
+/* sysfs.c: Toplogy sysfs support code for sparc64.
+ *
+ * Copyright (C) 2007 David S. Miller <davem@davemloft.net>
+ */
+#include <linux/sysdev.h>
+#include <linux/cpu.h>
+#include <linux/smp.h>
+#include <linux/percpu.h>
+#include <linux/init.h>
+
+#include <asm/hypervisor.h>
+#include <asm/spitfire.h>
+
+static DEFINE_PER_CPU(struct hv_mmu_statistics, mmu_stats) __attribute__((aligned(64)));
+
+#define SHOW_MMUSTAT_ULONG(NAME) \
+static ssize_t show_##NAME(struct sys_device *dev, char *buf) \
+{ \
+ struct hv_mmu_statistics *p = &per_cpu(mmu_stats, dev->id); \
+ return sprintf(buf, "%lu\n", p->NAME); \
+} \
+static SYSDEV_ATTR(NAME, 0444, show_##NAME, NULL)
+
+SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_8k_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_8k_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_64k_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_64k_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_4mb_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_4mb_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_256mb_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_256mb_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_8k_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_8k_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_64k_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_64k_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_4mb_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_4mb_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_256mb_tte);
+SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_256mb_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_8k_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_8k_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_64k_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_64k_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_4mb_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_4mb_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_256mb_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_256mb_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_8k_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_8k_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_64k_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_64k_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_4mb_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_4mb_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_256mb_tte);
+SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_256mb_tte);
+
+static struct attribute *mmu_stat_attrs[] = {
+ &attr_immu_tsb_hits_ctx0_8k_tte.attr,
+ &attr_immu_tsb_ticks_ctx0_8k_tte.attr,
+ &attr_immu_tsb_hits_ctx0_64k_tte.attr,
+ &attr_immu_tsb_ticks_ctx0_64k_tte.attr,
+ &attr_immu_tsb_hits_ctx0_4mb_tte.attr,
+ &attr_immu_tsb_ticks_ctx0_4mb_tte.attr,
+ &attr_immu_tsb_hits_ctx0_256mb_tte.attr,
+ &attr_immu_tsb_ticks_ctx0_256mb_tte.attr,
+ &attr_immu_tsb_hits_ctxnon0_8k_tte.attr,
+ &attr_immu_tsb_ticks_ctxnon0_8k_tte.attr,
+ &attr_immu_tsb_hits_ctxnon0_64k_tte.attr,
+ &attr_immu_tsb_ticks_ctxnon0_64k_tte.attr,
+ &attr_immu_tsb_hits_ctxnon0_4mb_tte.attr,
+ &attr_immu_tsb_ticks_ctxnon0_4mb_tte.attr,
+ &attr_immu_tsb_hits_ctxnon0_256mb_tte.attr,
+ &attr_immu_tsb_ticks_ctxnon0_256mb_tte.attr,
+ &attr_dmmu_tsb_hits_ctx0_8k_tte.attr,
+ &attr_dmmu_tsb_ticks_ctx0_8k_tte.attr,
+ &attr_dmmu_tsb_hits_ctx0_64k_tte.attr,
+ &attr_dmmu_tsb_ticks_ctx0_64k_tte.attr,
+ &attr_dmmu_tsb_hits_ctx0_4mb_tte.attr,
+ &attr_dmmu_tsb_ticks_ctx0_4mb_tte.attr,
+ &attr_dmmu_tsb_hits_ctx0_256mb_tte.attr,
+ &attr_dmmu_tsb_ticks_ctx0_256mb_tte.attr,
+ &attr_dmmu_tsb_hits_ctxnon0_8k_tte.attr,
+ &attr_dmmu_tsb_ticks_ctxnon0_8k_tte.attr,
+ &attr_dmmu_tsb_hits_ctxnon0_64k_tte.attr,
+ &attr_dmmu_tsb_ticks_ctxnon0_64k_tte.attr,
+ &attr_dmmu_tsb_hits_ctxnon0_4mb_tte.attr,
+ &attr_dmmu_tsb_ticks_ctxnon0_4mb_tte.attr,
+ &attr_dmmu_tsb_hits_ctxnon0_256mb_tte.attr,
+ &attr_dmmu_tsb_ticks_ctxnon0_256mb_tte.attr,
+ NULL,
+};
+
+static struct attribute_group mmu_stat_group = {
+ .attrs = mmu_stat_attrs,
+ .name = "mmu_stats",
+};
+
+/* XXX convert to rusty's on_one_cpu */
+static unsigned long run_on_cpu(unsigned long cpu,
+ unsigned long (*func)(unsigned long),
+ unsigned long arg)
+{
+ cpumask_t old_affinity = current->cpus_allowed;
+ unsigned long ret;
+
+ /* should return -EINVAL to userspace */
+ if (set_cpus_allowed(current, cpumask_of_cpu(cpu)))
+ return 0;
+
+ ret = func(arg);
+
+ set_cpus_allowed(current, old_affinity);
+
+ return ret;
+}
+
+static unsigned long read_mmustat_enable(unsigned long junk)
+{
+ unsigned long ra = 0;
+
+ sun4v_mmustat_info(&ra);
+
+ return ra != 0;
+}
+
+static unsigned long write_mmustat_enable(unsigned long val)
+{
+ unsigned long ra, orig_ra;
+
+ if (val)
+ ra = __pa(&per_cpu(mmu_stats, smp_processor_id()));
+ else
+ ra = 0UL;
+
+ return sun4v_mmustat_conf(ra, &orig_ra);
+}
+
+static ssize_t show_mmustat_enable(struct sys_device *s, char *buf)
+{
+ unsigned long val = run_on_cpu(s->id, read_mmustat_enable, 0);
+ return sprintf(buf, "%lx\n", val);
+}
+
+static ssize_t store_mmustat_enable(struct sys_device *s, const char *buf, size_t count)
+{
+ unsigned long val, err;
+ int ret = sscanf(buf, "%ld", &val);
+
+ if (ret != 1)
+ return -EINVAL;
+
+ err = run_on_cpu(s->id, write_mmustat_enable, val);
+ if (err)
+ return -EIO;
+
+ return count;
+}
+
+static SYSDEV_ATTR(mmustat_enable, 0644, show_mmustat_enable, store_mmustat_enable);
+
+static int mmu_stats_supported;
+
+static int register_mmu_stats(struct sys_device *s)
+{
+ if (!mmu_stats_supported)
+ return 0;
+ sysdev_create_file(s, &attr_mmustat_enable);
+ return sysfs_create_group(&s->kobj, &mmu_stat_group);
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+static void unregister_mmu_stats(struct sys_device *s)
+{
+ if (!mmu_stats_supported)
+ return;
+ sysfs_remove_group(&s->kobj, &mmu_stat_group);
+ sysdev_remove_file(s, &attr_mmustat_enable);
+}
+#endif
+
+#define SHOW_CPUDATA_ULONG_NAME(NAME, MEMBER) \
+static ssize_t show_##NAME(struct sys_device *dev, char *buf) \
+{ \
+ cpuinfo_sparc *c = &cpu_data(dev->id); \
+ return sprintf(buf, "%lu\n", c->MEMBER); \
+}
+
+#define SHOW_CPUDATA_UINT_NAME(NAME, MEMBER) \
+static ssize_t show_##NAME(struct sys_device *dev, char *buf) \
+{ \
+ cpuinfo_sparc *c = &cpu_data(dev->id); \
+ return sprintf(buf, "%u\n", c->MEMBER); \
+}
+
+SHOW_CPUDATA_ULONG_NAME(clock_tick, clock_tick);
+SHOW_CPUDATA_ULONG_NAME(udelay_val, udelay_val);
+SHOW_CPUDATA_UINT_NAME(l1_dcache_size, dcache_size);
+SHOW_CPUDATA_UINT_NAME(l1_dcache_line_size, dcache_line_size);
+SHOW_CPUDATA_UINT_NAME(l1_icache_size, icache_size);
+SHOW_CPUDATA_UINT_NAME(l1_icache_line_size, icache_line_size);
+SHOW_CPUDATA_UINT_NAME(l2_cache_size, ecache_size);
+SHOW_CPUDATA_UINT_NAME(l2_cache_line_size, ecache_line_size);
+
+static struct sysdev_attribute cpu_core_attrs[] = {
+ _SYSDEV_ATTR(clock_tick, 0444, show_clock_tick, NULL),
+ _SYSDEV_ATTR(udelay_val, 0444, show_udelay_val, NULL),
+ _SYSDEV_ATTR(l1_dcache_size, 0444, show_l1_dcache_size, NULL),
+ _SYSDEV_ATTR(l1_dcache_line_size, 0444, show_l1_dcache_line_size, NULL),
+ _SYSDEV_ATTR(l1_icache_size, 0444, show_l1_icache_size, NULL),
+ _SYSDEV_ATTR(l1_icache_line_size, 0444, show_l1_icache_line_size, NULL),
+ _SYSDEV_ATTR(l2_cache_size, 0444, show_l2_cache_size, NULL),
+ _SYSDEV_ATTR(l2_cache_line_size, 0444, show_l2_cache_line_size, NULL),
+};
+
+static DEFINE_PER_CPU(struct cpu, cpu_devices);
+
+static void register_cpu_online(unsigned int cpu)
+{
+ struct cpu *c = &per_cpu(cpu_devices, cpu);
+ struct sys_device *s = &c->sysdev;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(cpu_core_attrs); i++)
+ sysdev_create_file(s, &cpu_core_attrs[i]);
+
+ register_mmu_stats(s);
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+static void unregister_cpu_online(unsigned int cpu)
+{
+ struct cpu *c = &per_cpu(cpu_devices, cpu);
+ struct sys_device *s = &c->sysdev;
+ int i;
+
+ unregister_mmu_stats(s);
+ for (i = 0; i < ARRAY_SIZE(cpu_core_attrs); i++)
+ sysdev_remove_file(s, &cpu_core_attrs[i]);
+}
+#endif
+
+static int __cpuinit sysfs_cpu_notify(struct notifier_block *self,
+ unsigned long action, void *hcpu)
+{
+ unsigned int cpu = (unsigned int)(long)hcpu;
+
+ switch (action) {
+ case CPU_ONLINE:
+ case CPU_ONLINE_FROZEN:
+ register_cpu_online(cpu);
+ break;
+#ifdef CONFIG_HOTPLUG_CPU
+ case CPU_DEAD:
+ case CPU_DEAD_FROZEN:
+ unregister_cpu_online(cpu);
+ break;
+#endif
+ }
+ return NOTIFY_OK;
+}
+
+static struct notifier_block __cpuinitdata sysfs_cpu_nb = {
+ .notifier_call = sysfs_cpu_notify,
+};
+
+static void __init check_mmu_stats(void)
+{
+ unsigned long dummy1, err;
+
+ if (tlb_type != hypervisor)
+ return;
+
+ err = sun4v_mmustat_info(&dummy1);
+ if (!err)
+ mmu_stats_supported = 1;
+}
+
+static int __init topology_init(void)
+{
+ int cpu;
+
+ check_mmu_stats();
+
+ register_cpu_notifier(&sysfs_cpu_nb);
+
+ for_each_possible_cpu(cpu) {
+ struct cpu *c = &per_cpu(cpu_devices, cpu);
+
+ register_cpu(c, cpu);
+ if (cpu_online(cpu))
+ register_cpu_online(cpu);
+ }
+
+ return 0;
+}
+
+subsys_initcall(topology_init);