diff options
Diffstat (limited to 'arch/powerpc/kexec/file_load_64.c')
| -rw-r--r-- | arch/powerpc/kexec/file_load_64.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/powerpc/kexec/file_load_64.c b/arch/powerpc/kexec/file_load_64.c index 4b94c31e3172..2640a804fcdf 100644 --- a/arch/powerpc/kexec/file_load_64.c +++ b/arch/powerpc/kexec/file_load_64.c @@ -30,6 +30,7 @@ #include <asm/iommu.h> #include <asm/prom.h> #include <asm/plpks.h> +#include <asm/cputhreads.h> struct umem_info { __be64 *buf; /* data buffer for usable-memory property */ @@ -789,6 +790,9 @@ static unsigned int kdump_extra_fdt_size_ppc64(struct kimage *image) unsigned int cpu_nodes, extra_size = 0; struct device_node *dn; u64 usm_entries; +#ifdef CONFIG_CRASH_HOTPLUG + unsigned int possible_cpu_nodes; +#endif if (!IS_ENABLED(CONFIG_CRASH_DUMP) || image->type != KEXEC_TYPE_CRASH) return 0; @@ -816,6 +820,19 @@ static unsigned int kdump_extra_fdt_size_ppc64(struct kimage *image) if (cpu_nodes > boot_cpu_node_count) extra_size += (cpu_nodes - boot_cpu_node_count) * cpu_node_size(); +#ifdef CONFIG_CRASH_HOTPLUG + /* + * Make sure enough space is reserved to accommodate possible CPU nodes + * in the crash FDT. This allows packing possible CPU nodes which are + * not yet present in the system without regenerating the entire FDT. + */ + if (image->type == KEXEC_TYPE_CRASH) { + possible_cpu_nodes = num_possible_cpus() / threads_per_core; + if (possible_cpu_nodes > cpu_nodes) + extra_size += (possible_cpu_nodes - cpu_nodes) * cpu_node_size(); + } +#endif + return extra_size; } |