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1d54cf2b97
linux/arch/powerpc/mm
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sukadev@linux.vnet.ibm.com 1d54cf2b97 powerpc: Implement CONFIG_STRICT_DEVMEM 
As described in the help text in the patch, this token restricts general
access to /dev/mem as a way of increasing the security. Specifically, access
to exclusive IOMEM and kernel RAM is denied unless CONFIG_STRICT_DEVMEM is
set to 'n'.

Implement the 'devmem_is_allowed()' interface for Powerpc. It will be
called from range_is_allowed() when userpsace attempts to access /dev/mem.

This patch is based on an earlier patch from Steve Best and with input from
Paul Mackerras and Scott Wood.

[BenH] Fixed a typo or two and removed the generic change which should
       be submitted as a separate patch

Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-11-28 11:42:08 +11:00
..
40x_mmu.c
44x_mmu.c powerpc/47x: allow kernel to be loaded in higher physical memory 2011-07-12 10:34:24 -04:00
dma-noncoherent.c powerpc: include export.h for files using EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:30:38 -04:00
fault.c powerpc/icswx: Simple ACOP fault handler 2011-11-25 14:11:28 +11:00
fsl_booke_mmu.c powerpc/fsl-booke: Fix settlbcam for 64-bit 2011-10-12 23:39:10 -05:00
gup.c powerpc: remove superfluous PageTail checks on the pte gup_fast 2011-11-02 16:06:57 -07:00
hash_low_32.S
hash_low_64.S powerpc: Free up some CPU feature bits by moving out MMU-related features 2011-04-27 14:18:52 +10:00
hash_native_64.c KVM: PPC: book3s_hv: Add support for PPC970-family processors 2011-07-12 13:16:59 +03:00
hash_utils_64.c Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00
highmem.c mm: fix race in kunmap_atomic() 2010-10-27 18:03:05 -07:00
hugetlbpage-book3e.c powerpc: Fix hugetlb with CONFIG_PPC_MM_SLICES=y 2011-09-23 10:21:33 +10:00
hugetlbpage-hash64.c
hugetlbpage.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2011-11-06 17:12:03 -08:00
icswx_pid.c powerpc: Split ICSWX ACOP and PID processing 2011-11-25 14:11:27 +11:00
icswx.c powerpc/icswx: Simple ACOP fault handler 2011-11-25 14:11:28 +11:00
icswx.h powerpc/icswx: Simple ACOP fault handler 2011-11-25 14:11:28 +11:00
init_32.c powerpc: Hugetlb for BookE 2011-09-20 09:19:40 +10:00
init_64.c powerpc: Move free_initmem to common code 2011-06-30 15:28:05 +10:00
Makefile powerpc: Split ICSWX ACOP and PID processing 2011-11-25 14:11:27 +11:00
mem.c powerpc: Implement CONFIG_STRICT_DEVMEM 2011-11-28 11:42:08 +11:00
mmap_64.c
mmu_context_hash32.c powerpc: include export.h for files using EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:30:38 -04:00
mmu_context_hash64.c powerpc: Split ICSWX ACOP and PID processing 2011-11-25 14:11:27 +11:00
mmu_context_nohash.c powerpc: Hugetlb for BookE 2011-09-20 09:19:40 +10:00
mmu_decl.h powerpc/fsl-booke: Fix setup_initial_memory_limit to not blindly map 2011-10-11 23:30:41 -05:00
numa.c powerpc/numa: NUMA topology support for PowerNV 2011-11-08 14:51:46 +11:00
pgtable_32.c powerpc: Remove ioremap_flags 2011-05-19 14:30:43 +10:00
pgtable_64.c powerpc: add export.h to files making use of EXPORT_SYMBOL 2011-10-31 19:30:37 -04:00
pgtable.c powerpc: Hugetlb for BookE 2011-09-20 09:19:40 +10:00
ppc_mmu_32.c
slb_low.S powerpc: Free up some CPU feature bits by moving out MMU-related features 2011-04-27 14:18:52 +10:00
slb.c powerpc: Free up some CPU feature bits by moving out MMU-related features 2011-04-27 14:18:52 +10:00
slice.c powerpc: various straight conversions from module.h --> export.h 2011-10-31 19:30:44 -04:00
stab.c powerpc: Free up some CPU feature bits by moving out MMU-related features 2011-04-27 14:18:52 +10:00
subpage-prot.c
tlb_hash32.c powerpc: include export.h for files using EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:30:38 -04:00
tlb_hash64.c mm, powerpc: move the RCU page-table freeing into generic code 2011-05-25 08:39:16 -07:00
tlb_low_64e.S powerpc: Hugetlb for BookE 2011-09-20 09:19:40 +10:00
tlb_nohash_low.S powerpc/476: Workaround for PLB6 hang 2011-02-02 06:59:02 -05:00
tlb_nohash.c Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00