diff options
Diffstat (limited to 'arch/loongarch/kernel/setup.c')
| -rw-r--r-- | arch/loongarch/kernel/setup.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/loongarch/kernel/setup.c b/arch/loongarch/kernel/setup.c index 29f3b82cd0a5..34a3011f679e 100644 --- a/arch/loongarch/kernel/setup.c +++ b/arch/loongarch/kernel/setup.c @@ -38,6 +38,7 @@ #include <asm/pgalloc.h> #include <asm/sections.h> #include <asm/setup.h> +#include <asm/smp.h> #include <asm/time.h> #define SMBIOS_BIOSSIZE_OFFSET 0x09 @@ -322,6 +323,29 @@ static int __init reserve_memblock_reserved_regions(void) } arch_initcall(reserve_memblock_reserved_regions); +#ifdef CONFIG_SMP +static void __init prefill_possible_map(void) +{ + int i, possible; + + possible = num_processors + disabled_cpus; + if (possible > nr_cpu_ids) + possible = nr_cpu_ids; + + pr_info("SMP: Allowing %d CPUs, %d hotplug CPUs\n", + possible, max((possible - num_processors), 0)); + + for (i = 0; i < possible; i++) + set_cpu_possible(i, true); + for (; i < NR_CPUS; i++) + set_cpu_possible(i, false); + + nr_cpu_ids = possible; +} +#else +static inline void prefill_possible_map(void) {} +#endif + void __init setup_arch(char **cmdline_p) { cpu_probe(); @@ -336,6 +360,8 @@ void __init setup_arch(char **cmdline_p) arch_mem_init(cmdline_p); resource_init(); + plat_smp_setup(); + prefill_possible_map(); paging_init(); } |