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-rw-r--r--arch/tile/include/asm/Kbuild1
-rw-r--r--arch/tile/include/asm/irq_work.h14
-rw-r--r--arch/tile/include/asm/smp.h1
-rw-r--r--arch/tile/kernel/smp.c32
4 files changed, 46 insertions, 2 deletions
diff --git a/arch/tile/include/asm/Kbuild b/arch/tile/include/asm/Kbuild
index b4c488b65745..f5433e0e34e0 100644
--- a/arch/tile/include/asm/Kbuild
+++ b/arch/tile/include/asm/Kbuild
@@ -16,7 +16,6 @@ generic-y += ioctl.h
generic-y += ioctls.h
generic-y += ipcbuf.h
generic-y += irq_regs.h
-generic-y += irq_work.h
generic-y += local.h
generic-y += local64.h
generic-y += mcs_spinlock.h
diff --git a/arch/tile/include/asm/irq_work.h b/arch/tile/include/asm/irq_work.h
new file mode 100644
index 000000000000..48af33a61a2c
--- /dev/null
+++ b/arch/tile/include/asm/irq_work.h
@@ -0,0 +1,14 @@
+#ifndef __ASM_IRQ_WORK_H
+#define __ASM_IRQ_WORK_H
+
+static inline bool arch_irq_work_has_interrupt(void)
+{
+#ifdef CONFIG_SMP
+ extern bool self_interrupt_ok;
+ return self_interrupt_ok;
+#else
+ return false;
+#endif
+}
+
+#endif /* __ASM_IRQ_WORK_H */
diff --git a/arch/tile/include/asm/smp.h b/arch/tile/include/asm/smp.h
index 9a326b64f7ae..735e7f144733 100644
--- a/arch/tile/include/asm/smp.h
+++ b/arch/tile/include/asm/smp.h
@@ -69,6 +69,7 @@ static inline int xy_to_cpu(int x, int y)
#define MSG_TAG_STOP_CPU 2
#define MSG_TAG_CALL_FUNCTION_MANY 3
#define MSG_TAG_CALL_FUNCTION_SINGLE 4
+#define MSG_TAG_IRQ_WORK 5
/* Hook for the generic smp_call_function_many() routine. */
static inline void arch_send_call_function_ipi_mask(struct cpumask *mask)
diff --git a/arch/tile/kernel/smp.c b/arch/tile/kernel/smp.c
index d3c4ed780ce2..07e3ff5cc740 100644
--- a/arch/tile/kernel/smp.c
+++ b/arch/tile/kernel/smp.c
@@ -18,6 +18,7 @@
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/irq.h>
+#include <linux/irq_work.h>
#include <linux/module.h>
#include <asm/cacheflush.h>
#include <asm/homecache.h>
@@ -33,6 +34,8 @@ EXPORT_SYMBOL(smp_topology);
static unsigned long __iomem *ipi_mappings[NR_CPUS];
#endif
+/* Does messaging work correctly to the local cpu? */
+bool self_interrupt_ok;
/*
* Top-level send_IPI*() functions to send messages to other cpus.
@@ -147,6 +150,10 @@ void evaluate_message(int tag)
generic_smp_call_function_single_interrupt();
break;
+ case MSG_TAG_IRQ_WORK: /* Invoke IRQ work */
+ irq_work_run();
+ break;
+
default:
panic("Unknown IPI message tag %d", tag);
break;
@@ -186,6 +193,15 @@ void flush_icache_range(unsigned long start, unsigned long end)
EXPORT_SYMBOL(flush_icache_range);
+#ifdef CONFIG_IRQ_WORK
+void arch_irq_work_raise(void)
+{
+ if (arch_irq_work_has_interrupt())
+ send_IPI_single(smp_processor_id(), MSG_TAG_IRQ_WORK);
+}
+#endif
+
+
/* Called when smp_send_reschedule() triggers IRQ_RESCHEDULE. */
static irqreturn_t handle_reschedule_ipi(int irq, void *token)
{
@@ -203,8 +219,22 @@ static struct irqaction resched_action = {
void __init ipi_init(void)
{
+ int cpu = smp_processor_id();
+ HV_Recipient recip = { .y = cpu_y(cpu), .x = cpu_x(cpu),
+ .state = HV_TO_BE_SENT };
+ int tag = MSG_TAG_CALL_FUNCTION_SINGLE;
+
+ /*
+ * Test if we can message ourselves for arch_irq_work_raise.
+ * This functionality is only available in the Tilera hypervisor
+ * in versions 4.3.4 and following.
+ */
+ if (hv_send_message(&recip, 1, (HV_VirtAddr)&tag, sizeof(tag)) == 1)
+ self_interrupt_ok = true;
+ else
+ pr_warn("Older hypervisor: disabling fast irq_work_raise\n");
+
#if CHIP_HAS_IPI()
- int cpu;
/* Map IPI trigger MMIO addresses. */
for_each_possible_cpu(cpu) {
HV_Coord tile;