From: Jeremy Kerr <jk@ozlabs.org>
Date: Thu, 20 Dec 2007 07:39:59 +0000 (+0900)
Subject: [POWERPC] spufs: rework class 0 and 1 interrupt handling
X-Git-Tag: v2.6.25-rc1~1131^2~215
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d6ad39bc53521275d14fde86bfb94d9b2ddb7a08;p=pandora-kernel.git

[POWERPC] spufs: rework class 0 and 1 interrupt handling

Based on original patches from
 Arnd Bergmann <arnd.bergman@de.ibm.com>; and
 Luke Browning <lukebr@linux.vnet.ibm.com>

Currently, spu contexts need to be loaded to the SPU in order to take
class 0 and class 1 exceptions.

This change makes the actual interrupt-handlers much simpler (ie,
set the exception information in the context save area), and defers the
handling code to the spufs_handle_class[01] functions, called from
spufs_run_spu.

This should improve the concurrency of the spu scheduling leading to
greater SPU utilization when SPUs are overcommited.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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