diff options
Diffstat (limited to 'arch/powerpc/include/asm/book3s/64/mmu.h')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/mmu.h | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/mmu.h b/arch/powerpc/include/asm/book3s/64/mmu.h index c8c836e8ad1b..5094696eecd6 100644 --- a/arch/powerpc/include/asm/book3s/64/mmu.h +++ b/arch/powerpc/include/asm/book3s/64/mmu.h @@ -91,7 +91,18 @@ struct slice_mask { }; typedef struct { - mm_context_id_t id; + union { + /* + * We use id as the PIDR content for radix. On hash we can use + * more than one id. The extended ids are used when we start + * having address above 512TB. We allocate one extended id + * for each 512TB. The new id is then used with the 49 bit + * EA to build a new VA. We always use ESID_BITS_1T_MASK bits + * from EA and new context ids to build the new VAs. + */ + mm_context_id_t id; + mm_context_id_t extended_id[TASK_SIZE_USER64/TASK_CONTEXT_SIZE]; + }; u16 user_psize; /* page size index */ /* Number of bits in the mm_cpumask */ @@ -196,5 +207,25 @@ extern void radix_init_pseries(void); static inline void radix_init_pseries(void) { }; #endif +static inline int get_ea_context(mm_context_t *ctx, unsigned long ea) +{ + int index = ea >> MAX_EA_BITS_PER_CONTEXT; + + if (likely(index < ARRAY_SIZE(ctx->extended_id))) + return ctx->extended_id[index]; + + /* should never happen */ + WARN_ON(1); + return 0; +} + +static inline unsigned long get_user_vsid(mm_context_t *ctx, + unsigned long ea, int ssize) +{ + unsigned long context = get_ea_context(ctx, ea); + + return get_vsid(context, ea, ssize); +} + #endif /* __ASSEMBLY__ */ #endif /* _ASM_POWERPC_BOOK3S_64_MMU_H_ */ |