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-rw-r--r--arch/x86/Kconfig3
-rw-r--r--arch/x86/kernel/cpu/match.c44
-rw-r--r--arch/x86/kernel/cpuid.c59
-rw-r--r--drivers/base/cpu.c11
-rw-r--r--include/linux/cpu.h7
5 files changed, 66 insertions, 58 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 864cc6e6ac8e..6baa1e66e1bc 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -179,6 +179,9 @@ config ARCH_HAS_DEFAULT_IDLE
config ARCH_HAS_CACHE_LINE_SIZE
def_bool y
+config ARCH_HAS_CPU_AUTOPROBE
+ def_bool y
+
config HAVE_SETUP_PER_CPU_AREA
def_bool y
diff --git a/arch/x86/kernel/cpu/match.c b/arch/x86/kernel/cpu/match.c
index 7acc961422e7..940e2d483076 100644
--- a/arch/x86/kernel/cpu/match.c
+++ b/arch/x86/kernel/cpu/match.c
@@ -2,6 +2,7 @@
#include <asm/processor.h>
#include <linux/cpu.h>
#include <linux/module.h>
+#include <linux/slab.h>
/**
* x86_match_cpu - match current CPU again an array of x86_cpu_ids
@@ -46,3 +47,46 @@ const struct x86_cpu_id *x86_match_cpu(const struct x86_cpu_id *match)
return NULL;
}
EXPORT_SYMBOL(x86_match_cpu);
+
+ssize_t arch_print_cpu_modalias(struct device *dev,
+ struct device_attribute *attr,
+ char *bufptr)
+{
+ int size = PAGE_SIZE;
+ int i, n;
+ char *buf = bufptr;
+
+ n = snprintf(buf, size, "x86cpu:vendor:%04X:family:%04X:"
+ "model:%04X:feature:",
+ boot_cpu_data.x86_vendor,
+ boot_cpu_data.x86,
+ boot_cpu_data.x86_model);
+ size -= n;
+ buf += n;
+ size -= 2;
+ for (i = 0; i < NCAPINTS*32; i++) {
+ if (boot_cpu_has(i)) {
+ n = snprintf(buf, size, ",%04X", i);
+ if (n < 0) {
+ WARN(1, "x86 features overflow page\n");
+ break;
+ }
+ size -= n;
+ buf += n;
+ }
+ }
+ *buf++ = ',';
+ *buf++ = '\n';
+ return buf - bufptr;
+}
+
+int arch_cpu_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ char *buf = kzalloc(PAGE_SIZE, GFP_KERNEL);
+ if (buf) {
+ arch_print_cpu_modalias(NULL, NULL, buf);
+ add_uevent_var(env, "MODALIAS=%s", buf);
+ kfree(buf);
+ }
+ return 0;
+}
diff --git a/arch/x86/kernel/cpuid.c b/arch/x86/kernel/cpuid.c
index 7c89880eefd0..a524353d93f2 100644
--- a/arch/x86/kernel/cpuid.c
+++ b/arch/x86/kernel/cpuid.c
@@ -40,7 +40,6 @@
#include <linux/notifier.h>
#include <linux/uaccess.h>
#include <linux/gfp.h>
-#include <linux/slab.h>
#include <asm/processor.h>
#include <asm/msr.h>
@@ -139,57 +138,13 @@ static const struct file_operations cpuid_fops = {
.open = cpuid_open,
};
-static ssize_t print_cpu_modalias(struct device *dev,
- struct device_attribute *attr,
- char *bufptr)
-{
- int size = PAGE_SIZE;
- int i, n;
- char *buf = bufptr;
-
- n = snprintf(buf, size, "x86cpu:vendor:%04X:family:"
- "%04X:model:%04X:feature:",
- boot_cpu_data.x86_vendor,
- boot_cpu_data.x86,
- boot_cpu_data.x86_model);
- size -= n;
- buf += n;
- size -= 2;
- for (i = 0; i < NCAPINTS*32; i++) {
- if (boot_cpu_has(i)) {
- n = snprintf(buf, size, ",%04X", i);
- if (n < 0) {
- WARN(1, "x86 features overflow page\n");
- break;
- }
- size -= n;
- buf += n;
- }
- }
- *buf++ = ',';
- *buf++ = '\n';
- return buf - bufptr;
-}
-
-static DEVICE_ATTR(modalias, 0444, print_cpu_modalias, NULL);
-
static __cpuinit int cpuid_device_create(int cpu)
{
struct device *dev;
- int err;
dev = device_create(cpuid_class, NULL, MKDEV(CPUID_MAJOR, cpu), NULL,
"cpu%d", cpu);
- if (IS_ERR(dev))
- return PTR_ERR(dev);
-
- err = device_create_file(dev, &dev_attr_modalias);
- if (err) {
- /* keep device around on error. attribute is optional. */
- err = 0;
- }
-
- return 0;
+ return IS_ERR(dev) ? PTR_ERR(dev) : 0;
}
static void cpuid_device_destroy(int cpu)
@@ -227,17 +182,6 @@ static char *cpuid_devnode(struct device *dev, umode_t *mode)
return kasprintf(GFP_KERNEL, "cpu/%u/cpuid", MINOR(dev->devt));
}
-static int cpuid_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
-{
- char *buf = kzalloc(PAGE_SIZE, GFP_KERNEL);
- if (buf) {
- print_cpu_modalias(NULL, NULL, buf);
- add_uevent_var(env, "MODALIAS=%s", buf);
- kfree(buf);
- }
- return 0;
-}
-
static int __init cpuid_init(void)
{
int i, err = 0;
@@ -256,7 +200,6 @@ static int __init cpuid_init(void)
goto out_chrdev;
}
cpuid_class->devnode = cpuid_devnode;
- cpuid_class->dev_uevent = cpuid_dev_uevent;
for_each_online_cpu(i) {
err = cpuid_device_create(i);
if (err != 0)
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index db87e78d7459..2a0c670c281d 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -11,6 +11,7 @@
#include <linux/device.h>
#include <linux/node.h>
#include <linux/gfp.h>
+#include <linux/slab.h>
#include <linux/percpu.h>
#include "base.h"
@@ -223,6 +224,9 @@ int __cpuinit register_cpu(struct cpu *cpu, int num)
cpu->node_id = cpu_to_node(num);
cpu->dev.id = num;
cpu->dev.bus = &cpu_subsys;
+#ifdef CONFIG_ARCH_HAS_CPU_AUTOPROBE
+ cpu->dev.bus->uevent = arch_cpu_uevent;
+#endif
error = device_register(&cpu->dev);
if (!error && cpu->hotpluggable)
register_cpu_control(cpu);
@@ -247,6 +251,10 @@ struct device *get_cpu_device(unsigned cpu)
}
EXPORT_SYMBOL_GPL(get_cpu_device);
+#ifdef CONFIG_ARCH_HAS_CPU_AUTOPROBE
+static DEVICE_ATTR(modalias, 0444, arch_print_cpu_modalias, NULL);
+#endif
+
static struct attribute *cpu_root_attrs[] = {
#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
&dev_attr_probe.attr,
@@ -257,6 +265,9 @@ static struct attribute *cpu_root_attrs[] = {
&cpu_attrs[2].attr.attr,
&dev_attr_kernel_max.attr,
&dev_attr_offline.attr,
+#ifdef CONFIG_ARCH_HAS_CPU_AUTOPROBE
+ &dev_attr_modalias.attr,
+#endif
NULL
};
diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index 1f6587590a1a..6e53b4823d7f 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -44,6 +44,13 @@ extern ssize_t arch_cpu_release(const char *, size_t);
#endif
struct notifier_block;
+#ifdef CONFIG_ARCH_HAS_CPU_AUTOPROBE
+extern int arch_cpu_uevent(struct device *dev, struct kobj_uevent_env *env);
+extern ssize_t arch_print_cpu_modalias(struct device *dev,
+ struct device_attribute *attr,
+ char *bufptr);
+#endif
+
/*
* CPU notifier priorities.
*/
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 09:17:20 +0000