diff options
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/cpu.c | 13 | ||||
| -rw-r--r-- | drivers/base/memory.c | 13 |
2 files changed, 26 insertions, 0 deletions
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c index c1815b9dae68..c9204d69e616 100644 --- a/drivers/base/cpu.c +++ b/drivers/base/cpu.c @@ -282,6 +282,16 @@ static ssize_t print_cpus_nohz_full(struct device *dev, static DEVICE_ATTR(nohz_full, 0444, print_cpus_nohz_full, NULL); #endif +#ifdef CONFIG_CRASH_HOTPLUG +static ssize_t crash_hotplug_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return sysfs_emit(buf, "%d\n", crash_hotplug_cpu_support()); +} +static DEVICE_ATTR_ADMIN_RO(crash_hotplug); +#endif + static void cpu_device_release(struct device *dev) { /* @@ -469,6 +479,9 @@ static struct attribute *cpu_root_attrs[] = { #ifdef CONFIG_NO_HZ_FULL &dev_attr_nohz_full.attr, #endif +#ifdef CONFIG_CRASH_HOTPLUG + &dev_attr_crash_hotplug.attr, +#endif #ifdef CONFIG_GENERIC_CPU_AUTOPROBE &dev_attr_modalias.attr, #endif diff --git a/drivers/base/memory.c b/drivers/base/memory.c index b456ac213610..15bb416e58ce 100644 --- a/drivers/base/memory.c +++ b/drivers/base/memory.c @@ -490,6 +490,16 @@ static ssize_t auto_online_blocks_store(struct device *dev, static DEVICE_ATTR_RW(auto_online_blocks); +#ifdef CONFIG_CRASH_HOTPLUG +#include <linux/kexec.h> +static ssize_t crash_hotplug_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sysfs_emit(buf, "%d\n", crash_hotplug_memory_support()); +} +static DEVICE_ATTR_RO(crash_hotplug); +#endif + /* * Some architectures will have custom drivers to do this, and * will not need to do it from userspace. The fake hot-add code @@ -889,6 +899,9 @@ static struct attribute *memory_root_attrs[] = { &dev_attr_block_size_bytes.attr, &dev_attr_auto_online_blocks.attr, +#ifdef CONFIG_CRASH_HOTPLUG + &dev_attr_crash_hotplug.attr, +#endif NULL }; |