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android_kernel_motorola_sm6225/arch/powerpc/mm
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Paul Mackerras 0eeede0c63 powerpc/mm: Speed up computation of base and actual page size for a HPTE 
This replaces a 2-D search through an array with a simple 8-bit table
lookup for determining the actual and/or base page size for a HPT entry.

The encoding in the second doubleword of the HPTE is designed to encode
the actual and base page sizes without using any more bits than would be
needed for a 4k page number, by using between 1 and 8 low-order bits of
the RPN (real page number) field to encode the page sizes.  A single
"large page" bit in the first doubleword indicates that these low-order
bits are to be interpreted like this.

We can determine the page sizes by using the low-order 8 bits of the RPN
to look up a 256-entry table.  For actual page sizes less than 1MB, some
of the upper bits of these 8 bits are going to be real address bits, but
we can cope with that by replicating the entries for those smaller page
sizes.

While we're at it, let's move the hpte_page_size() and hpte_base_page_size()
functions from a KVM-specific header to a header for 64-bit HPT systems,
since this computation doesn't have anything specifically to do with KVM.

Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2016-09-09 16:14:48 +10:00
..
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 mm: do not pass mm_struct into handle_mm_fault 2016-07-26 16:19:19 -07:00
dma-noncoherent.c powerpc: Simplify test in __dma_sync() 2016-03-11 17:20:12 -06:00
fault.c mm: do not pass mm_struct into handle_mm_fault 2016-07-26 16:19:19 -07:00
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 powerpc: Use CURRENT_THREAD_INFO instead of open coded assembly 2012-07-11 14:18:22 +10:00
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: Speed up computation of base and actual page size for a HPTE 2016-09-09 16:14:48 +10:00
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 updates for 4.8 # 1 2016-07-30 21:01:36 -07:00
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
icswx_pid.c powerpc: Split ICSWX ACOP and PID processing 2011-11-25 14:11:27 +11:00
init_32.c powerpc/32: Remove RELOCATABLE_PPC32 2016-07-19 20:17:07 +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/mm/thp: Abstraction for THP functions 2016-05-11 21:53:57 +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 powerpc/mmu: Add userspace-to-physical addresses translation cache 2015-06-11 15:16:54 +10:00
mmu_context_nohash.c powerpc/mm/slice: Remove slice_mm_new_context() 2016-05-11 21:54:00 +10:00
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 updates for 4.8 # 1 2016-07-30 21:01:36 -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/mm: Move register_process_table() out of ppc_md 2016-08-04 20:22:34 +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: Move register_process_table() out of ppc_md 2016-08-04 20:22:34 +10:00
pgtable.c powerpc/mm: remove flush_tlb_page_nohash 2016-08-01 11:15:13 +10:00
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
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/mm: Remove long disabled SLB code 2016-04-11 20:30:40 +10:00
slb_low.S powerpc/mm: vmalloc abstraction in preparation for radix 2016-05-11 21:53:53 +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-radix.c powerpc/mm/radix/hugetlb: Add helper for finding page size from hstate 2016-08-01 11:15:12 +10:00
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.c powerpc/mm: Drop multiple definition of mm_is_core_local 2016-08-01 11:15:10 +10:00
tlb_nohash_low.S powerpc: Fix misspellings in comments. 2016-03-01 19:27:20 +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