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| author | Huacai Chen <chenhuacai@loongson.cn> | 2022-05-31 18:04:12 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2022-06-03 20:09:29 +0800 |
| commit | 46859ac8af52ae599e1b51992ddef3eb43f295fc (patch) | |
| tree | c1e6640316d5d8748bea046b71d2260b81cbe314 /arch/loongarch/kernel/irq.c | |
| parent | c6b99bed6b8f3255bd2f65a8e606352e0e638ad0 (diff) | |
| download | linux-46859ac8af52ae599e1b51992ddef3eb43f295fc.tar.bz2 | |
LoongArch: Add multi-processor (SMP) support
LoongArch-based procesors have 4, 8 or 16 cores per package. This patch
adds multi-processor (SMP) support for LoongArch.
Reviewed-by: WANG Xuerui <git@xen0n.name>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/kernel/irq.c')
| -rw-r--r-- | arch/loongarch/kernel/irq.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/arch/loongarch/kernel/irq.c b/arch/loongarch/kernel/irq.c index 9bd07edf0bce..4b671d305ede 100644 --- a/arch/loongarch/kernel/irq.c +++ b/arch/loongarch/kernel/irq.c @@ -47,13 +47,17 @@ asmlinkage void spurious_interrupt(void) int arch_show_interrupts(struct seq_file *p, int prec) { +#ifdef CONFIG_SMP + show_ipi_list(p, prec); +#endif seq_printf(p, "%*s: %10u\n", prec, "ERR", atomic_read(&irq_err_count)); return 0; } void __init init_IRQ(void) { - int i; + int i, r, ipi_irq; + static int ipi_dummy_dev; unsigned int order = get_order(IRQ_STACK_SIZE); struct page *page; @@ -61,6 +65,13 @@ void __init init_IRQ(void) clear_csr_estat(ESTATF_IP); irqchip_init(); +#ifdef CONFIG_SMP + ipi_irq = EXCCODE_IPI - EXCCODE_INT_START; + irq_set_percpu_devid(ipi_irq); + r = request_percpu_irq(ipi_irq, loongson3_ipi_interrupt, "IPI", &ipi_dummy_dev); + if (r < 0) + panic("IPI IRQ request failed\n"); +#endif for (i = 0; i < NR_IRQS; i++) irq_set_noprobe(i); |