[POWERPC] spufs: Add isolated-mode SPE recycling support
authorJeremy Kerr <jeremy@au1.ibm.com>
Tue, 24 Oct 2006 16:31:19 +0000 (18:31 +0200)
committerPaul Mackerras <paulus@samba.org>
Wed, 25 Oct 2006 04:20:21 +0000 (14:20 +1000)
commit099814bb1f9bd9081d7c85867f8eb8c049abc1b9
treed8a7a0a064bb922b90bf0a5c03f9864783c629df
parent0afacde3df4c9980f505d9afd7cb0058389732ca
[POWERPC] spufs: Add isolated-mode SPE recycling support

When in isolated mode, SPEs have access to an area of persistent
storage, which is per-SPE. In order for isolated-mode apps to
communicate arbitrary data through this storage, we need to ensure that
isolated physical SPEs can be reused for subsequent applications.

Add a file ("recycle") in a spethread dir to enable isolated-mode
recycling. By writing to this file, the kernel will reload the
isolated-mode loader kernel, allowing a new app to be run on the same
physical SPE.

This requires the spu_acquire_exclusive function to enforce exclusive
access to the SPE while the loader is initialised.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
arch/powerpc/platforms/cell/spufs/context.c
arch/powerpc/platforms/cell/spufs/file.c
arch/powerpc/platforms/cell/spufs/inode.c
arch/powerpc/platforms/cell/spufs/spufs.h