diff options
Diffstat (limited to 'arch/loongarch/kernel/smp.c')
| -rw-r--r-- | arch/loongarch/kernel/smp.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/loongarch/kernel/smp.c b/arch/loongarch/kernel/smp.c index 14508d429ffa..8c6e227cb29d 100644 --- a/arch/loongarch/kernel/smp.c +++ b/arch/loongarch/kernel/smp.c @@ -16,6 +16,7 @@ #include <linux/smp.h> #include <linux/threads.h> #include <linux/export.h> +#include <linux/syscore_ops.h> #include <linux/time.h> #include <linux/tracepoint.h> #include <linux/sched/hotplug.h> @@ -180,8 +181,42 @@ irqreturn_t loongson_ipi_interrupt(int irq, void *dev) return IRQ_HANDLED; } +static void __init fdt_smp_setup(void) +{ +#ifdef CONFIG_OF + unsigned int cpu, cpuid; + struct device_node *node = NULL; + + for_each_of_cpu_node(node) { + if (!of_device_is_available(node)) + continue; + + cpuid = of_get_cpu_hwid(node, 0); + if (cpuid >= nr_cpu_ids) + continue; + + if (cpuid == loongson_sysconf.boot_cpu_id) { + cpu = 0; + numa_add_cpu(cpu); + } else { + cpu = cpumask_next_zero(-1, cpu_present_mask); + } + + num_processors++; + set_cpu_possible(cpu, true); + set_cpu_present(cpu, true); + __cpu_number_map[cpuid] = cpu; + __cpu_logical_map[cpu] = cpuid; + } + + loongson_sysconf.nr_cpus = num_processors; +#endif +} + void __init loongson_smp_setup(void) { + fdt_smp_setup(); + cpu_data[0].core = cpu_logical_map(0) % loongson_sysconf.cores_per_package; cpu_data[0].package = cpu_logical_map(0) / loongson_sysconf.cores_per_package; |