diff options
Diffstat (limited to 'arch/powerpc/mm/slb.c')
| -rw-r--r-- | arch/powerpc/mm/slb.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/arch/powerpc/mm/slb.c b/arch/powerpc/mm/slb.c index 4fe5cb5052b6..c3fdf2969d9f 100644 --- a/arch/powerpc/mm/slb.c +++ b/arch/powerpc/mm/slb.c @@ -693,16 +693,27 @@ static long slb_allocate_kernel(unsigned long ea, unsigned long id) unsigned long flags; int ssize; - if ((ea & ~REGION_MASK) >= (1ULL << MAX_EA_BITS_PER_CONTEXT)) - return -EFAULT; - if (id == KERNEL_REGION_ID) { + + /* We only support upto MAX_PHYSMEM_BITS */ + if ((ea & ~REGION_MASK) > (1UL << MAX_PHYSMEM_BITS)) + return -EFAULT; + flags = SLB_VSID_KERNEL | mmu_psize_defs[mmu_linear_psize].sllp; + #ifdef CONFIG_SPARSEMEM_VMEMMAP } else if (id == VMEMMAP_REGION_ID) { + + if ((ea & ~REGION_MASK) >= (1ULL << MAX_EA_BITS_PER_CONTEXT)) + return -EFAULT; + flags = SLB_VSID_KERNEL | mmu_psize_defs[mmu_vmemmap_psize].sllp; #endif } else if (id == VMALLOC_REGION_ID) { + + if ((ea & ~REGION_MASK) >= (1ULL << MAX_EA_BITS_PER_CONTEXT)) + return -EFAULT; + if (ea < H_VMALLOC_END) flags = get_paca()->vmalloc_sllp; else @@ -715,8 +726,7 @@ static long slb_allocate_kernel(unsigned long ea, unsigned long id) if (!mmu_has_feature(MMU_FTR_1T_SEGMENT)) ssize = MMU_SEGSIZE_256M; - context = id - KERNEL_REGION_CONTEXT_OFFSET; - + context = get_kernel_context(ea); return slb_insert_entry(ea, context, flags, ssize, true); } |