Add preliminary support for binding interrupts to CPUs:

- Add a new intr_event method ie_assign_cpu() that is invoked when the MI
  code wishes to bind an interrupt source to an individual CPU.  The MD
  code may reject the binding with an error.  If an assign_cpu function
  is not provided, then the kernel assumes the platform does not support
  binding interrupts to CPUs and fails all requests to do so.
- Bind ithreads to CPUs on their next execution loop once an interrupt
  event is bound to a CPU.  Only shared ithreads are bound.  We currently
  leave private ithreads for drivers using filters + ithreads in the
  INTR_FILTER case unbound.
- A new intr_event_bind() routine is used to bind an interrupt event to
  a CPU.
- Implement binding on amd64 and i386 by way of the existing pic_assign_cpu
  PIC method.
- For x86, provide a 'intr_bind(IRQ, cpu)' wrapper routine that looks up
  an interrupt source and binds its interrupt event to the specified CPU.
  MI code can currently (ab)use this by doing:

	intr_bind(rman_get_start(irq_res), cpu);

  however, I plan to add a truly MI interface (probably a bus_bind_intr(9))
  where the implementation in the x86 nexus(4) driver would end up calling
  intr_bind() internally.

Requested by:	kmacy, gallatin, jeff
Tested on:	{amd64, i386} x {regular, INTR_FILTER}

1 files changed, 2 insertions, 2 deletions

diff --git a/sys/sparc64/sparc64/intr_machdep.c b/sys/sparc64/sparc64/intr_machdep.c
index 735b4c0..091ed90 100644
--- a/sys/sparc64/sparc64/intr_machdep.c
+++ b/sys/sparc64/sparc64/intr_machdep.c
@@ -331,9 +331,9 @@ intr_controller_register(int vec, const struct intr_controller *ic,
 	 */
 	error = intr_event_create(&ie, iv, 0, intr_enable_eoi,
 #ifdef INTR_FILTER
-	    ic->ic_eoi, ic->ic_disable, "vec%d:", vec);
+	    ic->ic_eoi, ic->ic_disable, NULL, "vec%d:", vec);
 #else
-	    "vec%d:", vec);
+	    NULL, "vec%d:", vec);
 #endif
 	if (error != 0)
 		return (error);