diff options
Diffstat (limited to 'arch/powerpc/sysdev/xive')
| -rw-r--r-- | arch/powerpc/sysdev/xive/common.c | 60 | ||||
| -rw-r--r-- | arch/powerpc/sysdev/xive/xive-internal.h | 2 |
2 files changed, 47 insertions, 15 deletions
diff --git a/arch/powerpc/sysdev/xive/common.c b/arch/powerpc/sysdev/xive/common.c index a9e9e57e8e73..edd000bcc9f6 100644 --- a/arch/powerpc/sysdev/xive/common.c +++ b/arch/powerpc/sysdev/xive/common.c @@ -63,8 +63,19 @@ static const struct xive_ops *xive_ops; static struct irq_domain *xive_irq_domain; #ifdef CONFIG_SMP -/* The IPIs all use the same logical irq number */ -static u32 xive_ipi_irq; +/* The IPIs use the same logical irq number when on the same chip */ +static struct xive_ipi_desc { + unsigned int irq; + char name[16]; +} *xive_ipis; + +/* + * Use early_cpu_to_node() for hot-plugged CPUs + */ +static unsigned int xive_ipi_cpu_to_irq(unsigned int cpu) +{ + return xive_ipis[early_cpu_to_node(cpu)].irq; +} #endif /* Xive state for each CPU */ @@ -1106,33 +1117,53 @@ static int __init xive_request_ipi(void) { struct fwnode_handle *fwnode; struct irq_domain *ipi_domain; - unsigned int virq; + unsigned int node; int ret = -ENOMEM; fwnode = irq_domain_alloc_named_fwnode("XIVE-IPI"); if (!fwnode) goto out; - ipi_domain = irq_domain_create_linear(fwnode, 1, + ipi_domain = irq_domain_create_linear(fwnode, nr_node_ids, &xive_ipi_irq_domain_ops, NULL); if (!ipi_domain) goto out_free_fwnode; - /* Initialize it */ - virq = irq_create_mapping(ipi_domain, XIVE_IPI_HW_IRQ); - if (!virq) { - ret = -EINVAL; + xive_ipis = kcalloc(nr_node_ids, sizeof(*xive_ipis), GFP_KERNEL | __GFP_NOFAIL); + if (!xive_ipis) goto out_free_domain; - } - xive_ipi_irq = virq; + for_each_node(node) { + struct xive_ipi_desc *xid = &xive_ipis[node]; + irq_hw_number_t ipi_hwirq = node; + + /* Skip nodes without CPUs */ + if (cpumask_empty(cpumask_of_node(node))) + continue; + + /* + * Map one IPI interrupt per node for all cpus of that node. + * Since the HW interrupt number doesn't have any meaning, + * simply use the node number. + */ + xid->irq = irq_create_mapping(ipi_domain, ipi_hwirq); + if (!xid->irq) { + ret = -EINVAL; + goto out_free_xive_ipis; + } + + snprintf(xid->name, sizeof(xid->name), "IPI-%d", node); + + ret = request_irq(xid->irq, xive_muxed_ipi_action, + IRQF_PERCPU | IRQF_NO_THREAD, xid->name, NULL); - ret = request_irq(virq, xive_muxed_ipi_action, - IRQF_PERCPU | IRQF_NO_THREAD, "IPI", NULL); + WARN(ret < 0, "Failed to request IPI %d: %d\n", xid->irq, ret); + } - WARN(ret < 0, "Failed to request IPI %d: %d\n", virq, ret); return ret; +out_free_xive_ipis: + kfree(xive_ipis); out_free_domain: irq_domain_remove(ipi_domain); out_free_fwnode: @@ -1143,6 +1174,7 @@ out: static int xive_setup_cpu_ipi(unsigned int cpu) { + unsigned int xive_ipi_irq = xive_ipi_cpu_to_irq(cpu); struct xive_cpu *xc; int rc; @@ -1185,6 +1217,8 @@ static int xive_setup_cpu_ipi(unsigned int cpu) static void xive_cleanup_cpu_ipi(unsigned int cpu, struct xive_cpu *xc) { + unsigned int xive_ipi_irq = xive_ipi_cpu_to_irq(cpu); + /* Disable the IPI and free the IRQ data */ /* Already cleaned up ? */ diff --git a/arch/powerpc/sysdev/xive/xive-internal.h b/arch/powerpc/sysdev/xive/xive-internal.h index 9cf57c722faa..b3a456fdd3a5 100644 --- a/arch/powerpc/sysdev/xive/xive-internal.h +++ b/arch/powerpc/sysdev/xive/xive-internal.h @@ -5,8 +5,6 @@ #ifndef __XIVE_INTERNAL_H #define __XIVE_INTERNAL_H -#define XIVE_IPI_HW_IRQ 0 /* interrupt source # for IPIs */ - /* * A "disabled" interrupt should never fire, to catch problems * we set its logical number to this |