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linux/arch/powerpc/mm
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Aneesh Kumar K.V 984d7a1ec6 powerpc/mm: Fixup kernel read only mapping 
With commit e58e87adc8 ("powerpc/mm: Update _PAGE_KERNEL_RO") we
started using the ppp value 0b110 to map kernel readonly. But that
facility was only added as part of ISA 2.04. For earlier ISA version
only supported ppp bit value for readonly mapping is 0b011. (This
implies both user and kernel get mapped using the same ppp bit value for
readonly mapping.).
Update the code such that for earlier architecture version we use ppp
value 0b011 for readonly mapping. We don't differentiate between power5+
and power5 here and apply the new ppp bits only from power6 (ISA 2.05).
This keep the changes minimal.

This fixes issue with PS3 spu usage reported at
https://lkml.kernel.org/r/rep.1421449714.geoff@infradead.org

Fixes: e58e87adc8 ("powerpc/mm: Update _PAGE_KERNEL_RO")
Cc: stable@vger.kernel.org # v4.7+
Tested-by: Geoff Levand <geoff@infradead.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-11-25 14:18:25 +11:00
..
8xx_mmu.c powerpc/8xx: add CONFIG_PIN_TLB_IMMR 2016-07-09 02:02:48 -05:00
40x_mmu.c powerpc/mm: Don't use pmd_val, pud_val and pgd_val as lvalue 2015-12-14 15:19:07 +11:00
44x_mmu.c powerpc: Delete __cpuinit usage from all users 2013-07-01 11:10:36 +10:00
copro_fault.c powerpc/mm: Prevent unlikely crash in copro_calculate_slb() 2016-10-19 20:32:49 +11:00
dma-noncoherent.c powerpc: Simplify test in __dma_sync() 2016-03-11 17:20:12 -06:00
fault.c powerpc: Use kprobe blacklist for exception handlers 2016-09-19 10:53:54 +10:00
fsl_booke_mmu.c powerpc/mm: Convert pte_user() to static inline 2016-05-01 18:32:24 +10:00
hash64_4k.c powerpc/mm: Move hash table ops to a separate structure 2016-07-21 18:59:09 +10:00
hash64_64k.c powerpc/mm: Move hash table ops to a separate structure 2016-07-21 18:59:09 +10:00
hash_low_32.S ppc: move exports to definitions 2016-08-07 23:50:09 -04:00
hash_native_64.c powerpc/mm: Speed up computation of base and actual page size for a HPTE 2016-09-09 16:14:48 +10:00
hash_utils_64.c powerpc/mm: Fixup kernel read only mapping 2016-11-25 14:18:25 +11:00
highmem.c sched/preempt, mm/kmap: Explicitly disable/enable preemption in kmap_atomic_* 2015-05-19 08:39:14 +02:00
hugepage-hash64.c powerpc/mm: Move hash table ops to a separate structure 2016-07-21 18:59:09 +10:00
hugetlbpage-book3e.c powerpc/fsl-book3e: Avoid lbarx on e5500 2016-03-03 23:43:05 -06:00
hugetlbpage-hash64.c powerpc/mm: Move hash table ops to a separate structure 2016-07-21 18:59:09 +10:00
hugetlbpage-radix.c powerpc/mm/hugetlb: Add flush_hugetlb_tlb_range 2016-08-01 11:15:13 +10:00
hugetlbpage.c powerpc: Fix usage of _PAGE_RO in hugepage 2016-09-23 07:54:22 +10:00
icswx_pid.c powerpc: Split ICSWX ACOP and PID processing 2011-11-25 14:11:27 +11:00
icswx.c powerpc: Fix typo "CONFIG_ICSWX_PID" 2013-04-18 13:03:54 +10:00
icswx.h powerpc/icswx: Fix race condition with IPI setting ACOP 2012-03-07 17:06:09 +11:00
init_32.c powerpc/32: Add missing \n and switch to pr_warn() 2016-09-13 17:37:11 +10:00
init_64.c powerpc/mm: Convert early cpu/mmu feature check to use the new helpers 2016-08-01 11:15:01 +10:00
Makefile powerpc/Makefile: Drop CONFIG_WORD_SIZE for BITS 2016-09-13 17:37:06 +10:00
mem.c powerpc: Fix build with CONFIG_MEMORY_HOTPLUG on some configs 2016-07-07 16:33:27 +10:00
mmap.c powerpc/mm/radix: Pick the address layout for radix config 2016-05-11 21:53:47 +10:00
mmu_context_book3s64.c powerpc/mm/radix: Update PID switch sequence 2016-07-17 16:42:53 +10:00
mmu_context_hash32.c powerpc: Remove power3 from comments 2014-07-28 14:10:26 +10:00
mmu_context_iommu.c KVM: PPC: Book3S HV: Migrate pinned pages out of CMA 2016-09-29 15:14:44 +10:00
mmu_context_nohash.c powerpc/mmu nohash: Convert to hotplug state machine 2016-09-06 18:30:27 +02:00
mmu_decl.h powerpc/8xx: Map IMMR area with 512k page at a fixed address 2016-07-09 02:02:48 -05:00
numa.c powerpc: Fix numa topology console print 2016-10-19 20:35:41 +11:00
pgtable_32.c treewide: replace obsolete _refok by __ref 2016-08-02 17:31:41 -04:00
pgtable_64.c tree wide: get rid of __GFP_REPEAT for order-0 allocations part I 2016-06-24 17:23:52 -07:00
pgtable-book3e.c powerpc/mm: Make page table size a variable 2016-05-01 18:32:48 +10:00
pgtable-book3s64.c powerpc/64/kexec: Fix MMU cleanup on radix 2016-09-23 07:54:17 +10:00
pgtable-hash64.c powerpc/mm/thp: Abstraction for THP functions 2016-05-11 21:53:57 +10:00
pgtable-radix.c powerpc/mm: Fix missing update of HID register on secondary CPUs 2016-11-18 23:16:58 +11:00
pgtable.c powerpc/mm/radix: Use different pte update sequence for different POWER9 revs 2016-09-13 17:37:10 +10:00
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_low.S powerpc updates for 4.9 2016-10-07 20:19:31 -07:00
slb.c powerpc/mm: Remove long disabled SLB code 2016-04-11 20:30:40 +10:00
slice.c powerpc/mm/radix: Add checks in slice code to catch radix usage 2016-05-11 21:53:46 +10:00
subpage-prot.c thp: rename split_huge_page_pmd() to split_huge_pmd() 2016-01-15 17:56:32 -08:00
tlb_hash32.c powerpc/mm: remove flush_tlb_page_nohash 2016-08-01 11:15:13 +10:00
tlb_hash64.c powerpc/mm: Hash abstraction for tlbflush routines 2016-05-01 18:33:08 +10:00
tlb_low_64e.S powerpc: Fix misspellings in comments. 2016-03-01 19:27:20 +11:00
tlb_nohash_low.S powerpc: Fix misspellings in comments. 2016-03-01 19:27:20 +11:00
tlb_nohash.c powerpc/mm: Drop multiple definition of mm_is_core_local 2016-08-01 11:15:10 +10:00
tlb-radix.c powerpc/mm/radix: Invalidate ERAT on tlbiel for POWER9 DD1 2016-11-18 15:12:24 +11:00
vphn.c powerpc/vphn: parsing code rewrite 2015-03-18 10:48:59 +11:00
vphn.h powerpc/vphn: parsing code rewrite 2015-03-18 10:48:59 +11:00