diff options
Diffstat (limited to 'arch/riscv/include/asm/smp.h')
-rw-r--r-- | arch/riscv/include/asm/smp.h | 69 |
1 files changed, 66 insertions, 3 deletions
diff --git a/arch/riscv/include/asm/smp.h b/arch/riscv/include/asm/smp.h index a83451d73a4e..0d555847cde6 100644 --- a/arch/riscv/include/asm/smp.h +++ b/arch/riscv/include/asm/smp.h @@ -16,6 +16,9 @@ struct seq_file; extern unsigned long boot_cpu_hartid; #ifdef CONFIG_SMP + +#include <linux/jump_label.h> + /* * Mapping between linux logical cpu index and hartid. */ @@ -34,8 +37,30 @@ 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); +int riscv_hartid_to_cpuid(unsigned long hartid); + +/* Enable IPI for CPU hotplug */ +void riscv_ipi_enable(void); + +/* Disable IPI for CPU hotplug */ +void riscv_ipi_disable(void); + +/* Check if IPI interrupt numbers are available */ +bool riscv_ipi_have_virq_range(void); + +/* Set the IPI interrupt numbers for arch (called by irqchip drivers) */ +void riscv_ipi_set_virq_range(int virq, int nr, bool use_for_rfence); + +/* Check if we can use IPIs for remote FENCEs */ +DECLARE_STATIC_KEY_FALSE(riscv_ipi_for_rfence); +#define riscv_use_ipi_for_rfence() \ + static_branch_unlikely(&riscv_ipi_for_rfence) + +/* Check other CPUs stop or not */ +bool smp_crash_stop_failed(void); + +/* Secondary hart entry */ +asmlinkage void smp_callin(void); /* * Obtains the hart ID of the currently executing task. This relies on @@ -43,13 +68,18 @@ void riscv_cpuid_to_hartid_mask(const struct cpumask *in, struct cpumask *out); */ #define raw_smp_processor_id() (current_thread_info()->cpu) +#if defined CONFIG_HOTPLUG_CPU +int __cpu_disable(void); +static inline void __cpu_die(unsigned int cpu) { } +#endif /* CONFIG_HOTPLUG_CPU */ + #else static inline void show_ipi_stats(struct seq_file *p, int prec) { } -static inline int riscv_hartid_to_cpuid(int hartid) +static inline int riscv_hartid_to_cpuid(unsigned long hartid) { if (hartid == boot_cpu_hartid) return 0; @@ -61,5 +91,38 @@ static inline unsigned long cpuid_to_hartid_map(int cpu) return boot_cpu_hartid; } +static inline void riscv_ipi_enable(void) +{ +} + +static inline void riscv_ipi_disable(void) +{ +} + +static inline bool riscv_ipi_have_virq_range(void) +{ + return false; +} + +static inline void riscv_ipi_set_virq_range(int virq, int nr, + bool use_for_rfence) +{ +} + +static inline bool riscv_use_ipi_for_rfence(void) +{ + return false; +} + #endif /* CONFIG_SMP */ + +#if defined(CONFIG_HOTPLUG_CPU) && (CONFIG_SMP) +bool cpu_has_hotplug(unsigned int cpu); +#else +static inline bool cpu_has_hotplug(unsigned int cpu) +{ + return false; +} +#endif + #endif /* _ASM_RISCV_SMP_H */ |