diff options
Diffstat (limited to 'arch/x86/kernel/crash.c')
| -rw-r--r-- | arch/x86/kernel/crash.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c index d755c41a50a7..22461ce7044a 100644 --- a/arch/x86/kernel/crash.c +++ b/arch/x86/kernel/crash.c @@ -429,6 +429,33 @@ int crash_load_segments(struct kimage *image) #undef pr_fmt #define pr_fmt(fmt) "crash hp: " fmt +/* These functions provide the value for the sysfs crash_hotplug nodes */ +#ifdef CONFIG_HOTPLUG_CPU +int arch_crash_hotplug_cpu_support(void) +{ + return crash_check_update_elfcorehdr(); +} +#endif + +#ifdef CONFIG_MEMORY_HOTPLUG +int arch_crash_hotplug_memory_support(void) +{ + return crash_check_update_elfcorehdr(); +} +#endif + +unsigned int arch_crash_get_elfcorehdr_size(void) +{ + unsigned int sz; + + /* kernel_map, VMCOREINFO and maximum CPUs */ + sz = 2 + CONFIG_NR_CPUS_DEFAULT; + if (IS_ENABLED(CONFIG_MEMORY_HOTPLUG)) + sz += CONFIG_CRASH_MAX_MEMORY_RANGES; + sz *= sizeof(Elf64_Phdr); + return sz; +} + /** * arch_crash_handle_hotplug_event() - Handle hotplug elfcorehdr changes * @image: a pointer to kexec_crash_image |