diff options
Diffstat (limited to 'arch/powerpc/include/asm/book3s/64/mmu-hash.h')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/mmu-hash.h | 70 |
1 files changed, 49 insertions, 21 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/mmu-hash.h b/arch/powerpc/include/asm/book3s/64/mmu-hash.h index a28a28079edb..1e4705516a54 100644 --- a/arch/powerpc/include/asm/book3s/64/mmu-hash.h +++ b/arch/powerpc/include/asm/book3s/64/mmu-hash.h @@ -588,7 +588,8 @@ extern void slb_set_size(u16 size); #endif #define MAX_VMALLOC_CTX_CNT 1 -#define MAX_MEMMAP_CTX_CNT 1 +#define MAX_IO_CTX_CNT 1 +#define MAX_VMEMMAP_CTX_CNT 1 /* * 256MB segment @@ -601,13 +602,10 @@ extern void slb_set_size(u16 size); * would give a protovsid of 0x1fffffffff. That will result in a VSID 0 * because of the modulo operation in vsid scramble. * - * We add one extra context to MIN_USER_CONTEXT so that we can map kernel - * context easily. The +1 is to map the unused 0xe region mapping. */ #define MAX_USER_CONTEXT ((ASM_CONST(1) << CONTEXT_BITS) - 2) #define MIN_USER_CONTEXT (MAX_KERNEL_CTX_CNT + MAX_VMALLOC_CTX_CNT + \ - MAX_MEMMAP_CTX_CNT + 2) - + MAX_IO_CTX_CNT + MAX_VMEMMAP_CTX_CNT) /* * For platforms that support on 65bit VA we limit the context bits */ @@ -657,8 +655,8 @@ extern void slb_set_size(u16 size); /* 4 bits per slice and we have one slice per 1TB */ #define SLICE_ARRAY_SIZE (H_PGTABLE_RANGE >> 41) -#define TASK_SLICE_ARRAY_SZ(x) ((x)->context.slb_addr_limit >> 41) - +#define LOW_SLICE_ARRAY_SZ (BITS_PER_LONG / BITS_PER_BYTE) +#define TASK_SLICE_ARRAY_SZ(x) ((x)->hash_context->slb_addr_limit >> 41) #ifndef __ASSEMBLY__ #ifdef CONFIG_PPC_SUBPAGE_PROT @@ -687,12 +685,41 @@ struct subpage_prot_table { #define SBP_L3_SHIFT (SBP_L2_SHIFT + SBP_L2_BITS) extern void subpage_prot_free(struct mm_struct *mm); -extern void subpage_prot_init_new_context(struct mm_struct *mm); #else static inline void subpage_prot_free(struct mm_struct *mm) {} -static inline void subpage_prot_init_new_context(struct mm_struct *mm) { } #endif /* CONFIG_PPC_SUBPAGE_PROT */ +/* + * One bit per slice. We have lower slices which cover 256MB segments + * upto 4G range. That gets us 16 low slices. For the rest we track slices + * in 1TB size. + */ +struct slice_mask { + u64 low_slices; + DECLARE_BITMAP(high_slices, SLICE_NUM_HIGH); +}; + +struct hash_mm_context { + u16 user_psize; /* page size index */ + + /* SLB page size encodings*/ + unsigned char low_slices_psize[LOW_SLICE_ARRAY_SZ]; + unsigned char high_slices_psize[SLICE_ARRAY_SIZE]; + unsigned long slb_addr_limit; +#ifdef CONFIG_PPC_64K_PAGES + struct slice_mask mask_64k; +#endif + struct slice_mask mask_4k; +#ifdef CONFIG_HUGETLB_PAGE + struct slice_mask mask_16m; + struct slice_mask mask_16g; +#endif + +#ifdef CONFIG_PPC_SUBPAGE_PROT + struct subpage_prot_table *spt; +#endif /* CONFIG_PPC_SUBPAGE_PROT */ +}; + #if 0 /* * The code below is equivalent to this function for arguments @@ -747,7 +774,7 @@ static inline unsigned long get_vsid(unsigned long context, unsigned long ea, /* * Bad address. We return VSID 0 for that */ - if ((ea & ~REGION_MASK) >= H_PGTABLE_RANGE) + if ((ea & EA_MASK) >= H_PGTABLE_RANGE) return 0; if (!mmu_has_feature(MMU_FTR_68_BIT_VA)) @@ -774,28 +801,29 @@ static inline unsigned long get_vsid(unsigned long context, unsigned long ea, * 0x00002 - [ 0xc002000000000000 - 0xc003ffffffffffff] * 0x00003 - [ 0xc004000000000000 - 0xc005ffffffffffff] * 0x00004 - [ 0xc006000000000000 - 0xc007ffffffffffff] - - * 0x00005 - [ 0xd000000000000000 - 0xd001ffffffffffff ] - * 0x00006 - Not used - Can map 0xe000000000000000 range. - * 0x00007 - [ 0xf000000000000000 - 0xf001ffffffffffff ] * - * So we can compute the context from the region (top nibble) by - * subtracting 11, or 0xc - 1. + * vmap, IO, vmemap + * + * 0x00005 - [ 0xc008000000000000 - 0xc009ffffffffffff] + * 0x00006 - [ 0xc00a000000000000 - 0xc00bffffffffffff] + * 0x00007 - [ 0xc00c000000000000 - 0xc00dffffffffffff] + * */ static inline unsigned long get_kernel_context(unsigned long ea) { - unsigned long region_id = REGION_ID(ea); + unsigned long region_id = get_region_id(ea); unsigned long ctx; /* - * For linear mapping we do support multiple context + * Depending on Kernel config, kernel region can have one context + * or more. */ - if (region_id == KERNEL_REGION_ID) { + if (region_id == LINEAR_MAP_REGION_ID) { /* * We already verified ea to be not beyond the addr limit. */ - ctx = 1 + ((ea & ~REGION_MASK) >> MAX_EA_BITS_PER_CONTEXT); + ctx = 1 + ((ea & EA_MASK) >> MAX_EA_BITS_PER_CONTEXT); } else - ctx = (region_id - 0xc) + MAX_KERNEL_CTX_CNT; + ctx = region_id + MAX_KERNEL_CTX_CNT - 1; return ctx; } |