Merge branch irq/irq_cpu_offline into irq/irqchip-next
* irq/irq_cpu_offline:
: .
: Make irq_cpu_{on,off}line() deprecated kernel API, and only
: enable it for some obscure Cavium platform after having
: moved all the other users away from it.
:
: Next step, drop the platform itself.
: .
genirq: Hide irq_cpu_{on,off}line() behind a deprecated option
irqchip/mips-gic: Get rid of the reliance on irq_cpu_online()
MIPS: loongson64: Drop call to irq_cpu_offline()
Signed-off-by: Marc Zyngier <maz@kernel.org>
diff --git a/arch/mips/loongson64/smp.c b/arch/mips/loongson64/smp.c
index 09ebe84..660e1de 100644
--- a/arch/mips/loongson64/smp.c
+++ b/arch/mips/loongson64/smp.c
@@ -550,7 +550,6 @@ static int loongson3_cpu_disable(void)
set_cpu_online(cpu, false);
calculate_cpu_foreign_map();
local_irq_save(flags);
- irq_cpu_offline();
clear_c0_status(ST0_IM);
local_irq_restore(flags);
local_flush_tlb_all();
diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c
index 54c7092..d02b05a 100644
--- a/drivers/irqchip/irq-mips-gic.c
+++ b/drivers/irqchip/irq-mips-gic.c
@@ -381,24 +381,35 @@ static void gic_unmask_local_irq_all_vpes(struct irq_data *d)
spin_unlock_irqrestore(&gic_lock, flags);
}
-static void gic_all_vpes_irq_cpu_online(struct irq_data *d)
+static void gic_all_vpes_irq_cpu_online(void)
{
- struct gic_all_vpes_chip_data *cd;
- unsigned int intr;
+ static const unsigned int local_intrs[] = {
+ GIC_LOCAL_INT_TIMER,
+ GIC_LOCAL_INT_PERFCTR,
+ GIC_LOCAL_INT_FDC,
+ };
+ unsigned long flags;
+ int i;
- intr = GIC_HWIRQ_TO_LOCAL(d->hwirq);
- cd = irq_data_get_irq_chip_data(d);
+ spin_lock_irqsave(&gic_lock, flags);
- write_gic_vl_map(mips_gic_vx_map_reg(intr), cd->map);
- if (cd->mask)
- write_gic_vl_smask(BIT(intr));
+ for (i = 0; i < ARRAY_SIZE(local_intrs); i++) {
+ unsigned int intr = local_intrs[i];
+ struct gic_all_vpes_chip_data *cd;
+
+ cd = &gic_all_vpes_chip_data[intr];
+ write_gic_vl_map(mips_gic_vx_map_reg(intr), cd->map);
+ if (cd->mask)
+ write_gic_vl_smask(BIT(intr));
+ }
+
+ spin_unlock_irqrestore(&gic_lock, flags);
}
static struct irq_chip gic_all_vpes_local_irq_controller = {
.name = "MIPS GIC Local",
.irq_mask = gic_mask_local_irq_all_vpes,
.irq_unmask = gic_unmask_local_irq_all_vpes,
- .irq_cpu_online = gic_all_vpes_irq_cpu_online,
};
static void __gic_irq_dispatch(void)
@@ -477,6 +488,10 @@ static int gic_irq_domain_map(struct irq_domain *d, unsigned int virq,
intr = GIC_HWIRQ_TO_LOCAL(hwirq);
map = GIC_MAP_PIN_MAP_TO_PIN | gic_cpu_pin;
+ /*
+ * If adding support for more per-cpu interrupts, keep the the
+ * array in gic_all_vpes_irq_cpu_online() in sync.
+ */
switch (intr) {
case GIC_LOCAL_INT_TIMER:
/* CONFIG_MIPS_CMP workaround (see __gic_init) */
@@ -663,8 +678,8 @@ static int gic_cpu_startup(unsigned int cpu)
/* Clear all local IRQ masks (ie. disable all local interrupts) */
write_gic_vl_rmask(~0);
- /* Invoke irq_cpu_online callbacks to enable desired interrupts */
- irq_cpu_online();
+ /* Enable desired interrupts */
+ gic_all_vpes_irq_cpu_online();
return 0;
}
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 988c225..848e1e1 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -524,9 +524,10 @@ struct irq_chip {
void (*irq_bus_lock)(struct irq_data *data);
void (*irq_bus_sync_unlock)(struct irq_data *data);
+#ifdef CONFIG_DEPRECATED_IRQ_CPU_ONOFFLINE
void (*irq_cpu_online)(struct irq_data *data);
void (*irq_cpu_offline)(struct irq_data *data);
-
+#endif
void (*irq_suspend)(struct irq_data *data);
void (*irq_resume)(struct irq_data *data);
void (*irq_pm_shutdown)(struct irq_data *data);
@@ -606,8 +607,10 @@ struct irqaction;
extern int setup_percpu_irq(unsigned int irq, struct irqaction *new);
extern void remove_percpu_irq(unsigned int irq, struct irqaction *act);
+#ifdef CONFIG_DEPRECATED_IRQ_CPU_ONOFFLINE
extern void irq_cpu_online(void);
extern void irq_cpu_offline(void);
+#endif
extern int irq_set_affinity_locked(struct irq_data *data,
const struct cpumask *cpumask, bool force);
extern int irq_set_vcpu_affinity(unsigned int irq, void *vcpu_info);
diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig
index 1b41078..10929ed 100644
--- a/kernel/irq/Kconfig
+++ b/kernel/irq/Kconfig
@@ -141,3 +141,10 @@
bool
help
Allow to specify the low level IRQ handler at run time.
+
+# Cavium Octeon is the last system to use this deprecated option
+# Do not even think of enabling this on any new platform
+config DEPRECATED_IRQ_CPU_ONOFFLINE
+ bool
+ depends on CAVIUM_OCTEON_SOC
+ default CAVIUM_OCTEON_SOC
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index a98bcfc..f895265 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -1122,6 +1122,7 @@ void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set)
}
EXPORT_SYMBOL_GPL(irq_modify_status);
+#ifdef CONFIG_DEPRECATED_IRQ_CPU_ONOFFLINE
/**
* irq_cpu_online - Invoke all irq_cpu_online functions.
*
@@ -1181,6 +1182,7 @@ void irq_cpu_offline(void)
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
}
+#endif
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
