diff options
Diffstat (limited to 'arch/riscv/include/asm')
| -rw-r--r-- | arch/riscv/include/asm/smp.h | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/arch/riscv/include/asm/smp.h b/arch/riscv/include/asm/smp.h index 85d7619eb927..47fd61dfc897 100644 --- a/arch/riscv/include/asm/smp.h +++ b/arch/riscv/include/asm/smp.h @@ -18,6 +18,13 @@ #include <linux/irqreturn.h> #include <linux/thread_info.h> +#define INVALID_HARTID ULONG_MAX +/* + * Mapping between linux logical cpu index and hartid. + */ +extern unsigned long __cpuid_to_hartid_map[NR_CPUS]; +#define cpuid_to_hartid_map(cpu) __cpuid_to_hartid_map[cpu] + #ifdef CONFIG_SMP /* SMP initialization hook for setup_arch */ @@ -29,12 +36,27 @@ void arch_send_call_function_ipi_mask(struct cpumask *mask); /* Hook for the generic smp_call_function_single() routine. */ void arch_send_call_function_single_ipi(int cpu); +int riscv_hartid_to_cpuid(int hartid); +void riscv_cpuid_to_hartid_mask(const struct cpumask *in, struct cpumask *out); + /* * Obtains the hart ID of the currently executing task. This relies on * THREAD_INFO_IN_TASK, but we define that unconditionally. */ #define raw_smp_processor_id() (current_thread_info()->cpu) -#endif /* CONFIG_SMP */ +#else + +static inline int riscv_hartid_to_cpuid(int hartid) +{ + return 0; +} +static inline void riscv_cpuid_to_hartid_mask(const struct cpumask *in, + struct cpumask *out) +{ + cpumask_set_cpu(cpuid_to_hartid_map(0), out); +} + +#endif /* CONFIG_SMP */ #endif /* _ASM_RISCV_SMP_H */ |