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android_kernel_motorola_sm6225/arch/powerpc/mm
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Ram Pai cf43d3b264 powerpc: Enable pkey subsystem 
PAPR defines 'ibm,processor-storage-keys' property. It exports two
values. The first value holds the number of data-access keys and the
second holds the number of instruction-access keys. Due to a bug in
the firmware, instruction-access keys is always reported as zero.
However any key can be configured to disable data-access and/or
disable execution-access. The inavailablity of the second value is not
a big handicap, though it could have been used to determine if the
platform supported disable-execution-access.

Non-PAPR platforms do not define this property in the device tree yet.
Fortunately power8 is the only released Non-PAPR platform that is
supported. Here, we hardcode the number of supported pkey to 32, by
consulting the PowerISA3.0

This patch calculates the number of keys supported by the platform.
Also it determines the platform support for read/write/execution
access support for pkeys.

Signed-off-by: Ram Pai <linuxram@us.ibm.com>
[mpe: Use a PVR check instead of CPU_FTR for execute. Restrict to
 Power7/8/9 for now until older CPUs are tested.]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-01-21 01:06:10 +11:00
..
8xx_mmu.c powerpc/8xx: Use L1 entry APG to handle _PAGE_ACCESSED for CONFIG_SWAP 2018-01-16 23:47:15 +11:00
40x_mmu.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
44x_mmu.c powerpc: Delete __cpuinit usage from all users 2013-07-01 11:10:36 +10:00
copro_fault.c powerpc/mm: Update PROTFAULT handling in the page fault path 2017-02-15 20:02:39 +11:00
dma-noncoherent.c powerpc/mm: Rename map_page() to map_kernel_page() on 32-bit 2017-06-05 19:59:03 +10:00
drmem.c powerpc/drmem: Add support for ibm, dynamic-memory-v2 property 2018-01-16 23:26:29 +11:00
dump_hashpagetable.c powerpc/64s: Replace CONFIG_PPC_STD_MMU_64 with CONFIG_PPC_BOOK3S_64 2017-11-06 16:48:14 +11:00
dump_linuxpagetables.c powerpc/mm: Introduce _PAGE_NA 2018-01-16 23:47:14 +11:00
fault.c powerpc: Deliver SEGV signal on pkey violation 2018-01-20 22:59:05 +11:00
fsl_booke_mmu.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
hash64_4k.c powerpc: use helper functions to get and set hash slots 2017-12-20 18:57:25 +11:00
hash64_64k.c powerpc: Free up four 64K PTE bits in 64K backed HPTE pages 2017-12-20 18:57:22 +11:00
hash_low_32.S powerpc: fix location of two EXPORT_SYMBOL 2017-09-01 16:42:45 +10:00
hash_native_64.c powerpc/64s: Improve local TLB flush for boot and MCE on POWER9 2018-01-18 00:40:31 +11:00
hash_utils_64.c powerpc: introduce get_mm_addr_key() helper 2018-01-20 22:59:05 +11:00
highmem.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hugepage-hash64.c powerpc/mm: Move hash table ops to a separate structure 2016-07-21 18:59:09 +10:00
hugetlbpage-book3e.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hugetlbpage-hash64.c powerpc: Free up four 64K PTE bits in 64K backed HPTE pages 2017-12-20 18:57:22 +11:00
hugetlbpage-radix.c powerpc updates for 4.15 2017-11-16 12:47:46 -08:00
hugetlbpage.c powerpc/64: Rename soft_enabled to irq_soft_mask 2018-01-19 22:37:01 +11:00
init-common.c Merge branch 'topic/ppc-kvm' into next 2017-02-14 17:18:29 +11:00
init_32.c powerpc/mm/hugetlb: Add support for reserving gigantic huge pages via kernel command line 2017-08-16 14:56:12 +10:00
init_64.c powerpc: Use pr_warn instead of pr_warning 2017-12-04 11:54:34 +11:00
Makefile powerpc: initial pkey plumbing 2018-01-20 21:45:03 +11:00
mem.c powerpc: Use pr_warn instead of pr_warning 2017-12-04 11:54:34 +11:00
mmap.c powerpc/64s: mm_context.addr_limit is only used on hash 2017-11-13 23:35:43 +11:00
mmu_context.c cxl: Enable global TLBIs for cxl contexts 2017-09-28 17:09:16 +10:00
mmu_context_book3s64.c powerpc: track allocation status of all pkeys 2018-01-20 22:58:35 +11:00
mmu_context_hash32.c powerpc: Remove power3 from comments 2014-07-28 14:10:26 +10:00
mmu_context_iommu.c Merge branch 'topic/ppc-kvm' into next 2017-04-28 20:19:37 +10:00
mmu_context_nohash.c powerpc/mm/nohash: MM_SLICE is only used by book3s 64 2017-03-31 23:09:47 +11:00
mmu_decl.h powerpc/8xx: Getting rid of remaining use of CONFIG_8xx 2017-08-10 23:32:12 +10:00
numa.c powerpc/numa: Update numa code use walk_drmem_lmbs 2018-01-16 23:26:28 +11:00
pgtable-book3e.c powerpc/mm: Make page table size a variable 2016-05-01 18:32:48 +10:00
pgtable-book3s64.c powerpc/mm/cxl: Add the fault handling cpu to mm cpumask 2017-08-17 23:31:52 +10:00
pgtable-hash64.c powerpc/mm: Use mm_is_thread_local() instread of open-coding 2017-08-23 22:27:45 +10:00
pgtable-radix.c powerpc/pseries: lift RTAS limit for radix 2018-01-18 00:44:42 +11:00
pgtable.c powerpc/mm: extend _PAGE_PRIVILEGED to all CPUs 2018-01-16 23:47:13 +11:00
pgtable_32.c powerpc/mm: extend _PAGE_PRIVILEGED to all CPUs 2018-01-16 23:47:13 +11:00
pgtable_64.c powerpc/mm: extend _PAGE_PRIVILEGED to all CPUs 2018-01-16 23:47:13 +11:00
pkeys.c powerpc: Enable pkey subsystem 2018-01-21 01:06:10 +11:00
ppc_mmu_32.c powerpc32: refactor x_mapped_by_bats() and x_mapped_by_tlbcam() together 2016-03-11 17:18:02 -06:00
slb.c powerpc/64s: Rename slb_allocate_realmode() to slb_allocate() 2017-06-21 16:18:33 +10:00
slb_low.S powerpc/64s: mm_context.addr_limit is only used on hash 2017-11-13 23:35:43 +11:00
slice.c powerpc/64s/slice: Use addr limit when computing slice mask 2017-11-20 19:28:25 +11:00
subpage-prot.c powerpc/mm/hash: Free the subpage_prot_table correctly 2017-07-27 13:05:50 +10:00
tlb-radix.c powerpc/64s: Improve local TLB flush for boot and MCE on POWER9 2018-01-18 00:40:31 +11:00
tlb_hash32.c powerpc/mm: remove flush_tlb_page_nohash 2016-08-01 11:15:13 +10:00
tlb_hash64.c powerpc/mm: Use mm_is_thread_local() instread of open-coding 2017-08-23 22:27:45 +10:00
tlb_low_64e.S powerpc: Fix misspellings in comments. 2016-03-01 19:27:20 +11:00
tlb_nohash.c powerpc/nohash: Fix use of mmu_has_feature() in setup_initial_memory_limit() 2017-04-11 07:46:04 +10:00
tlb_nohash_low.S powerpc/8xx: Getting rid of remaining use of CONFIG_8xx 2017-08-10 23:32:12 +10:00
vphn.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vphn.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00