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Diffstat (limited to 'arch/riscv/include/asm/smp.h')
-rw-r--r--arch/riscv/include/asm/smp.h24
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 */