openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity
linux/arch/powerpc/mm
History
Aneesh Kumar K.V e58e87adc8 powerpc/mm: Update _PAGE_KERNEL_RO 
PS3 had used a PPP bit hack to implement a read only mapping in the
kernel area. Since we are bolting the ioremap area, it used the pte
flags _PAGE_PRESENT | _PAGE_USER to get a PPP value of 0x3 there by
resulting in a read only mapping. This means the area can be accessed by
user space, but kernel will never return such an address to user space.

But we can do better by implementing a read only kernel mapping using
PPP bits 0b110.

This also allows us to do read only kernel mapping for radix in later
patches.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
 		2016-05-01 18:32:30 +10:00
..
8xx_mmu.c powerpc/8xx: rewrite flush_instruction_cache() in C 2016-03-11 17:20:11 -06:00
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
Makefile powerpc/8xx: Map linear kernel RAM with 8M pages 2016-03-11 17:18:01 -06:00
copro_fault.c cxl: Move include file cxl.h -> cxl-base.h 2015-06-03 13:27:19 +10:00
dma-noncoherent.c powerpc: Simplify test in __dma_sync() 2016-03-11 17:20:12 -06:00
fault.c powerpc: Add plain English description for alignment exception oopses 2015-07-06 20:24:35 +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: Replace _PAGE_USER with _PAGE_PRIVILEGED 2016-05-01 18:32:26 +10:00
hash64_64k.c powerpc/mm: Replace _PAGE_USER with _PAGE_PRIVILEGED 2016-05-01 18:32:26 +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: Move THP headers around 2015-12-14 15:19:14 +11:00
hash_utils_64.c powerpc/mm: Update _PAGE_KERNEL_RO 2016-05-01 18:32:30 +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: Replace _PAGE_USER with _PAGE_PRIVILEGED 2016-05-01 18:32:26 +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: Replace _PAGE_USER with _PAGE_PRIVILEGED 2016-05-01 18:32:26 +10:00
hugetlbpage.c powerpc/mm: Replace _PAGE_USER with _PAGE_PRIVILEGED 2016-05-01 18:32:26 +10:00
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 updates for 4.6 2016-03-19 15:38:41 -07:00
init_64.c powerpc/mm: Switch book3s 64 with 64K page size to 4 level page table 2016-03-03 21:18:28 +11:00
mem.c powerpc updates for 4.6 2016-03-19 15:38:41 -07:00
mmap.c powerpc: sparse: Include headers for __weak symbols 2016-04-12 21:05:19 +10:00
mmu_context_hash32.c powerpc: Remove power3 from comments 2014-07-28 14:10:26 +10:00
mmu_context_hash64.c mm: introduce page reference manipulation functions 2016-03-17 15:09:34 -07:00
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/8xx: reduce pressure on TLB due to context switches 2015-01-29 21:51:06 -06:00
mmu_decl.h powerpc32: remove ioremap_base 2016-03-11 17:18:02 -06:00
numa.c powerpc updates for 4.4 2015-11-05 23:38:43 -08:00
pgtable.c powerpc/mm: Replace _PAGE_USER with _PAGE_PRIVILEGED 2016-05-01 18:32:26 +10:00
pgtable_32.c powerpc32: PAGE_EXEC required for inittext 2016-03-11 20:04:32 -06:00
pgtable_64.c powerpc/mm: Remove RPN_SHIFT and RPN_SIZE 2016-05-01 18:32:29 +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.c powerpc/mm: Remove long disabled SLB code 2016-04-11 20:30:40 +10:00
slb_low.S powerpc/mm: Remove long disabled SLB code 2016-04-11 20:30:40 +10:00
slice.c powerpc: Add function to copy mm_context_t to the paca 2015-12-19 22:13:12 +11:00
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: include export.h for files using EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:30:38 -04:00
tlb_hash64.c powerpc/mm: Differentiate between hugetlb and THP during page walk 2015-10-12 15:30:09 +11:00
tlb_low_64e.S powerpc: Fix misspellings in comments. 2016-03-01 19:27:20 +11:00
tlb_nohash.c powerpc/mm: any thread in one core can be the first to setup TLB1 2016-03-04 23:44:02 -06:00
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