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authorMarcin Nowakowski <marcin.nowakowski@imgtec.com>2017-01-25 15:08:25 +0100
committerMarc Zyngier <marc.zyngier@arm.com>2017-02-08 14:25:50 +0000
commit4cfffcfa5106492f5785924ce2e9af49f075999b (patch)
tree35687eed0ebea602c32604e0107c0c87385897b3 /drivers/irqchip
parentb4d3053c8ce9c71266f9da71c8ece79c0f8ebc23 (diff)
downloadlinux-4cfffcfa5106492f5785924ce2e9af49f075999b.tar.bz2
irqchip/mips-gic: Fix local interrupts
Some local interrupts are not initialised properly at the moment and cannot be used since the domain's alloc method is never called for them. This has been observed earlier and partially fixed in commit e875bd66dfb ("irqchip/mips-gic: Fix local interrupts"), but that change still relied on the interrupt to be requested by an external driver (eg. drivers/clocksource/mips-gic-timer.c). This does however not solve the issue for interrupts that are not referenced by any driver through the device tree and results in request_irq() calls returning -ENOSYS. It can be observed when attempting to use perf tool to access hardware performance counters. Fix this by explicitly calling irq_create_fwspec_mapping() for local interrupts. Fixes: e875bd66dfb ("irqchip/mips-gic: Fix local interrupts") Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: linux-mips@linux-mips.org Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'drivers/irqchip')
-rw-r--r--drivers/irqchip/irq-mips-gic.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c
index c01c09e9916d..11d12bccc4e7 100644
--- a/drivers/irqchip/irq-mips-gic.c
+++ b/drivers/irqchip/irq-mips-gic.c
@@ -968,6 +968,34 @@ static struct irq_domain_ops gic_ipi_domain_ops = {
.match = gic_ipi_domain_match,
};
+static void __init gic_map_single_int(struct device_node *node,
+ unsigned int irq)
+{
+ unsigned int linux_irq;
+ struct irq_fwspec local_int_fwspec = {
+ .fwnode = &node->fwnode,
+ .param_count = 3,
+ .param = {
+ [0] = GIC_LOCAL,
+ [1] = irq,
+ [2] = IRQ_TYPE_NONE,
+ },
+ };
+
+ if (!gic_local_irq_is_routable(irq))
+ return;
+
+ linux_irq = irq_create_fwspec_mapping(&local_int_fwspec);
+ WARN_ON(!linux_irq);
+}
+
+static void __init gic_map_interrupts(struct device_node *node)
+{
+ gic_map_single_int(node, GIC_LOCAL_INT_TIMER);
+ gic_map_single_int(node, GIC_LOCAL_INT_PERFCTR);
+ gic_map_single_int(node, GIC_LOCAL_INT_FDC);
+}
+
static void __init __gic_init(unsigned long gic_base_addr,
unsigned long gic_addrspace_size,
unsigned int cpu_vec, unsigned int irqbase,
@@ -1067,6 +1095,7 @@ static void __init __gic_init(unsigned long gic_base_addr,
}
gic_basic_init();
+ gic_map_interrupts(node);
}
void __init gic_init(unsigned long gic_base_addr,