diff options
| author | Michael Ellerman <mpe@ellerman.id.au> | 2016-05-11 15:30:47 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-05-11 21:46:02 +1000 |
| commit | 773edeadf672546cd554e0797fc02a9e6edf01ae (patch) | |
| tree | 86b5af2f3b9d2b42c89803e8301679f6c05b4feb /arch/powerpc/include/asm/mmu.h | |
| parent | 1a472c9dba6b9646fd36717968f6a531b4441c7d (diff) | |
powerpc/mm: Add mask of possible MMU features
Follow the example of the cpu feature code, and add a mask of possible
MMU features, MMU_FTRS_POSSIBLE.
This is used in mmu_has_feature(), which allows the possible mask to act
as a shortcut for any features that are not possible, but still allows
the feature bit itself to be defined.
We will use this in the next commit to allow MMU_FTR_RADIX checks to be
elided when MMU_FTR_RADIX is not possible.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/mmu.h')
| -rw-r--r-- | arch/powerpc/include/asm/mmu.h | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h index 34070e982f1d..fbd6f351c399 100644 --- a/arch/powerpc/include/asm/mmu.h +++ b/arch/powerpc/include/asm/mmu.h @@ -110,9 +110,21 @@ DECLARE_PER_CPU(int, next_tlbcam_idx); #endif +enum { + MMU_FTRS_POSSIBLE = MMU_FTR_HPTE_TABLE | MMU_FTR_TYPE_8xx | + MMU_FTR_TYPE_40x | MMU_FTR_TYPE_44x | MMU_FTR_TYPE_FSL_E | + MMU_FTR_TYPE_47x | MMU_FTR_USE_HIGH_BATS | MMU_FTR_BIG_PHYS | + MMU_FTR_USE_TLBIVAX_BCAST | MMU_FTR_USE_TLBILX | + MMU_FTR_LOCK_BCAST_INVAL | MMU_FTR_NEED_DTLB_SW_LRU | + MMU_FTR_USE_TLBRSRV | MMU_FTR_USE_PAIRED_MAS | + MMU_FTR_NO_SLBIE_B | MMU_FTR_16M_PAGE | MMU_FTR_TLBIEL | + MMU_FTR_LOCKLESS_TLBIE | MMU_FTR_CI_LARGE_PAGE | + MMU_FTR_1T_SEGMENT, +}; + static inline int mmu_has_feature(unsigned long feature) { - return (cur_cpu_spec->mmu_features & feature); + return (MMU_FTRS_POSSIBLE & cur_cpu_spec->mmu_features & feature); } static inline void mmu_clear_feature(unsigned long feature) |