diff options
Diffstat (limited to 'arch/riscv/kernel/smp.c')
| -rw-r--r-- | arch/riscv/kernel/smp.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/riscv/kernel/smp.c b/arch/riscv/kernel/smp.c index 40420afbb1a0..5bd06a1460e9 100644 --- a/arch/riscv/kernel/smp.c +++ b/arch/riscv/kernel/smp.c @@ -49,6 +49,21 @@ static DEFINE_PER_CPU_READ_MOSTLY(int, ipi_dummy_dev); static int ipi_virq_base __ro_after_init; static int nr_ipi __ro_after_init = IPI_MAX; static struct irq_desc *ipi_desc[IPI_MAX] __read_mostly; +#ifdef CONFIG_RISCV_AMP +static struct irq_desc *amp_desc; +static void (*ipi_mailbox_handler)(unsigned long msg_type); +void ipi_amp_handle(unsigned long msg_type) +{ + if (ipi_mailbox_handler) + ipi_mailbox_handler(msg_type); +} + +void register_ipi_mailbox_handler(void (*handler)(unsigned long)) +{ + ipi_mailbox_handler = handler; +} +EXPORT_SYMBOL_GPL(register_ipi_mailbox_handler); +#endif int riscv_hartid_to_cpuid(unsigned long hartid) { @@ -136,6 +151,11 @@ static irqreturn_t handle_IPI(int irq, void *data) tick_receive_broadcast(); break; #endif +#ifdef CONFIG_RISCV_AMP + case IPI_AMP: + ipi_amp_handle(riscv_clear_amp_bits()); + break; +#endif default: pr_warn("CPU%d: unhandled IPI%d\n", smp_processor_id(), ipi); break; @@ -153,6 +173,10 @@ void riscv_ipi_enable(void) for (i = 0; i < nr_ipi; i++) enable_percpu_irq(ipi_virq_base + i, 0); +#ifdef CONFIG_RISCV_AMP + if (riscv_get_ipi_amp_enable()) + enable_percpu_irq(ipi_virq_base + IPI_AMP, 0); +#endif } void riscv_ipi_disable(void) @@ -164,6 +188,10 @@ void riscv_ipi_disable(void) for (i = 0; i < nr_ipi; i++) disable_percpu_irq(ipi_virq_base + i); +#ifdef CONFIG_RISCV_AMP + if (riscv_get_ipi_amp_enable()) + disable_percpu_irq(ipi_virq_base + IPI_AMP); +#endif } bool riscv_ipi_have_virq_range(void) @@ -194,7 +222,16 @@ void riscv_ipi_set_virq_range(int virq, int nr, bool use_for_rfence) ipi_desc[i] = irq_to_desc(ipi_virq_base + i); irq_set_status_flags(ipi_virq_base + i, IRQ_HIDDEN); } +#ifdef CONFIG_RISCV_AMP + if (riscv_get_ipi_amp_enable()) { + err = request_percpu_irq(ipi_virq_base + IPI_AMP, handle_IPI, + "IPI", &ipi_dummy_dev); + WARN_ON(err); + amp_desc = irq_to_desc(ipi_virq_base + IPI_AMP); + irq_set_status_flags(ipi_virq_base + IPI_AMP, IRQ_HIDDEN); + } +#endif /* Enabled IPIs for boot CPU immediately */ riscv_ipi_enable(); @@ -225,6 +262,15 @@ void show_ipi_stats(struct seq_file *p, int prec) seq_printf(p, "%10u ", irq_desc_kstat_cpu(ipi_desc[i], cpu)); seq_printf(p, " %s\n", ipi_names[i]); } +#ifdef CONFIG_RISCV_AMP + if (riscv_get_ipi_amp_enable()) { + seq_printf(p, "%*s:%s", prec - 1, "IAMP", + prec >= 4 ? " " : ""); + for_each_online_cpu(cpu) + seq_printf(p, "%10u ", irq_desc_kstat_cpu(amp_desc, cpu)); + seq_printf(p, " %s\n", "AMP rpmsg interrupts"); + } +#endif } void arch_send_call_function_ipi_mask(struct cpumask *mask) |