aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc/platforms/cell/Kconfig
diff options
context:
space:
mode:
authorMark Nutter <mnutter@us.ibm.com>2006-03-23 00:00:12 +0100
committerPaul Mackerras <paulus@samba.org>2006-03-27 14:48:28 +1100
commit6df10a82f8de89c66eb91c371d62d76e87b2cbba (patch)
treee8615f4c00a44f4e4a609d59c51e958f0300526b /arch/powerpc/platforms/cell/Kconfig
parenta33a7d7309d79656bc19a0e96fc4547a1633283e (diff)
[PATCH] spufs: enable SPE problem state MMIO access.
This patch is layered on top of CONFIG_SPARSEMEM and is patterned after direct mapping of LS. This patch allows mmap() of the following regions: "mfc", which represents the area from [0x3000 - 0x3fff]; "cntl", which represents the area from [0x4000 - 0x4fff]; "signal1" which begins at offset 0x14000; "signal2" which begins at offset 0x1c000. The signal1 & signal2 files may be mmap()'d by regular user processes. The cntl and mfc file, on the other hand, may only be accessed if the owning process has CAP_SYS_RAWIO, because they have the potential to confuse the kernel with regard to parallel access to the same files with regular file operations: the kernel always holds a spinlock when accessing registers in these areas to serialize them, which can not be guaranteed with user mmaps, Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms/cell/Kconfig')
-rw-r--r--arch/powerpc/platforms/cell/Kconfig5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/Kconfig b/arch/powerpc/platforms/cell/Kconfig
index 3157071e241..c2a3db8edb0 100644
--- a/arch/powerpc/platforms/cell/Kconfig
+++ b/arch/powerpc/platforms/cell/Kconfig
@@ -10,4 +10,9 @@ config SPU_FS
Units on machines implementing the Broadband Processor
Architecture.
+config SPUFS_MMAP
+ bool
+ depends on SPU_FS && SPARSEMEM && !PPC_64K_PAGES
+ default y
+
endmenu