On 04/10/2013 03:30 AM, Michael Ellerman wrote:

On Mon, Mar 25, 2013 at 01:52:32PM -0500, Nathan Fontenot wrote:

quoted

From: Jesse Larrew <redacted>

A PRRN event is signaled via the RTAS event-scan mechanism, which
returns a Hot Plug Event message "fixed part" indicating "Platform
Resource Reassignment". In response to the Hot Plug Event message,
we must call ibm,update-nodes to determine which resources were
reassigned and then ibm,update-properties to obtain the new affinity
information about those resources.

..

quoted

Index: powerpc/arch/powerpc/kernel/rtasd.c
===================================================================

--- powerpc.orig/arch/powerpc/kernel/rtasd.c	2013-03-20 08:24:14.000000000 -0500
+++ powerpc/arch/powerpc/kernel/rtasd.c	2013-03-20 08:52:08.000000000 -0500

@@ -87,6 +87,8 @@
 			return "Resource Deallocation Event";
 		case RTAS_TYPE_DUMP:
 			return "Dump Notification Event";
+		case RTAS_TYPE_PRRN:
+			return "Platform Resource Reassignment Event";
 	}
 
 	return rtas_type[0];

@@ -265,7 +267,38 @@
 		spin_unlock_irqrestore(&rtasd_log_lock, s);
 		return;
 	}
+}
+
+static s32 update_scope;
+
+static void prrn_work_fn(struct work_struct *work)
+{
+	/*
+	 * For PRRN, we must pass the negative of the scope value in
+	 * the RTAS event.
+	 */
+	pseries_devicetree_update(-update_scope);
+}
+static DECLARE_WORK(prrn_work, prrn_work_fn);

This breaks the 32-bit build (ppc6xx_defconfig):

arch/powerpc/kernel/rtasd.c:280: undefined reference to `pseries_devicetree_update'

I'm not seeing this error. rtasd.c compilkes fine, but I am hitting another
error later in the build that keeps it from finishing.

arch/powerpc/platforms/52xx/mpc52xx_pic.c: In function ‘mpc52xx_irqhost_map’:
arch/powerpc/platforms/52xx/mpc52xx_pic.c:343: error: ‘irqchip’ may be used uninitialized in this function


-Nathan