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73d2fb758e
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Anton Blanchard 73d2fb758e powerpc: Emulate non privileged DSCR read and write 
POWER8 allows read and write of the DSCR in userspace. We added
kernel emulation so applications could always use the instructions
regardless of the CPU type.

Unfortunately there are two SPRs for the DSCR and we only added
emulation for the privileged one. Add code to match the non
privileged one.

A simple test was created to verify the fix:

http://ozlabs.org/~anton/junkcode/user_dscr_test.c

Without the patch we get a SIGILL and it passes with the patch.

Signed-off-by: Anton Blanchard <anton@samba.org>
Cc: <stable@kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-05-06 09:25:35 +10:00
..
alpha Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-05-01 17:51:54 -07:00
arc arc, print-fatal-signals: reduce duplicated information 2013-04-30 17:04:02 -07:00
arm Merge tag 'kvm-3.10-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm 2013-05-05 14:47:31 -07:00
arm64 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal 2013-05-01 07:21:43 -07:00
avr32 MMC highlights for 3.10: 2013-05-04 13:45:17 -07:00
blackfin We get rid of the general module prefix confusion with a binary config option, 2013-05-05 10:58:06 -07:00
c6x dump_stack: unify debug information printed by show_regs() 2013-04-30 17:04:02 -07:00
cris cris: single_open() leaks 2013-05-05 00:07:52 -04:00
frv Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2013-05-01 14:08:52 -07:00
h8300 We get rid of the general module prefix confusion with a binary config option, 2013-05-05 10:58:06 -07:00
hexagon Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rkuo/linux-hexagon-kernel 2013-05-01 07:43:05 -07:00
ia64 Merge tag 'kvm-3.10-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm 2013-05-05 14:47:31 -07:00
m32r Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2013-05-01 14:08:52 -07:00
m68k Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal 2013-05-01 07:21:43 -07:00
metag We get rid of the general module prefix confusion with a binary config option, 2013-05-05 10:58:06 -07:00
microblaze Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal 2013-05-01 07:21:43 -07:00
mips mips: single_open() leaks 2013-05-05 00:10:21 -04:00
mn10300 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2013-05-01 14:08:52 -07:00
openrisc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rkuo/linux-hexagon-kernel 2013-05-01 07:43:05 -07:00
parisc parisc: single_open() leaks 2013-05-05 00:10:41 -04:00
powerpc powerpc: Emulate non privileged DSCR read and write 2013-05-06 09:25:35 +10:00
s390 Merge tag 'kvm-3.10-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm 2013-05-05 14:47:31 -07:00
score Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-05-01 17:51:54 -07:00
sh sh: single_open() leaks 2013-05-05 00:11:01 -04:00
sparc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc 2013-05-04 18:34:13 -07:00
tile Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-05-01 17:51:54 -07:00
um Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-05-05 13:23:27 -07:00
unicore32 Merge branch 'akpm' (incoming from Andrew) 2013-04-30 17:37:43 -07:00
x86 Merge tag 'kvm-3.10-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm 2013-05-05 14:47:31 -07:00
xtensa xtensa simdisk: fix braino in "xtensa simdisk: switch to proc_create_data()" 2013-05-04 16:02:42 -04:00
.gitignore
Kconfig We get rid of the general module prefix confusion with a binary config option, 2013-05-05 10:58:06 -07:00