diff options
Diffstat (limited to 'arch/riscv/kernel/smp.c')
| -rw-r--r-- | arch/riscv/kernel/smp.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/arch/riscv/kernel/smp.c b/arch/riscv/kernel/smp.c index ea028d9e0d24..921d9d7df400 100644 --- a/arch/riscv/kernel/smp.c +++ b/arch/riscv/kernel/smp.c @@ -9,6 +9,7 @@ */ #include <linux/cpu.h> +#include <linux/clockchips.h> #include <linux/interrupt.h> #include <linux/module.h> #include <linux/profile.h> @@ -27,10 +28,11 @@ enum ipi_message_type { IPI_CALL_FUNC, IPI_CPU_STOP, IPI_IRQ_WORK, + IPI_TIMER, IPI_MAX }; -unsigned long __cpuid_to_hartid_map[NR_CPUS] = { +unsigned long __cpuid_to_hartid_map[NR_CPUS] __ro_after_init = { [0 ... NR_CPUS-1] = INVALID_HARTID }; @@ -54,7 +56,7 @@ int riscv_hartid_to_cpuid(int hartid) return i; pr_err("Couldn't find cpu id for hartid [%d]\n", hartid); - return i; + return -ENOENT; } void riscv_cpuid_to_hartid_mask(const struct cpumask *in, struct cpumask *out) @@ -85,9 +87,9 @@ static void ipi_stop(void) wait_for_interrupt(); } -static struct riscv_ipi_ops *ipi_ops; +static const struct riscv_ipi_ops *ipi_ops __ro_after_init; -void riscv_set_ipi_ops(struct riscv_ipi_ops *ops) +void riscv_set_ipi_ops(const struct riscv_ipi_ops *ops) { ipi_ops = ops; } @@ -176,6 +178,12 @@ void handle_IPI(struct pt_regs *regs) irq_work_run(); } +#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST + if (ops & (1 << IPI_TIMER)) { + stats[IPI_TIMER]++; + tick_receive_broadcast(); + } +#endif BUG_ON((ops >> IPI_MAX) != 0); /* Order data access and bit testing. */ @@ -192,6 +200,7 @@ static const char * const ipi_names[] = { [IPI_CALL_FUNC] = "Function call interrupts", [IPI_CPU_STOP] = "CPU stop interrupts", [IPI_IRQ_WORK] = "IRQ work interrupts", + [IPI_TIMER] = "Timer broadcast interrupts", }; void show_ipi_stats(struct seq_file *p, int prec) @@ -217,6 +226,13 @@ void arch_send_call_function_single_ipi(int cpu) send_ipi_single(cpu, IPI_CALL_FUNC); } +#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST +void tick_broadcast(const struct cpumask *mask) +{ + send_ipi_mask(mask, IPI_TIMER); +} +#endif + void smp_send_stop(void) { unsigned long timeout; |