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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2016-04-29 15:25:53 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-05-01 10:32:54 +0200 |
| commit | 566ca99af026d43c7cf7ab72f78463dbcc7e6ac2 (patch) | |
| tree | d294a62f837f4107ccb35452a2f2d0bf355ff995 /arch | |
| parent | powerpc/mm/radix: Add radix pte #defines (diff) | |
| download | linux-566ca99af026d43c7cf7ab72f78463dbcc7e6ac2.tar.xz linux-566ca99af026d43c7cf7ab72f78463dbcc7e6ac2.zip | |
powerpc/mm/radix: Add dummy radix_enabled()
In this patch we add the radix Kconfig and conditional check.
radix_enabled() is written to always return 0 here. Once we have all
needed radix changes added, we will update this to an mmu_feature check.
We need to add this early so that we can get it all build in the early
stage.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/mmu.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/mmu.h | 3 | ||||
| -rw-r--r-- | arch/powerpc/platforms/Kconfig.cputype | 9 |
3 files changed, 14 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/mmu.h b/arch/powerpc/include/asm/book3s/64/mmu.h index b86786f2521c..593d9e3ce8e7 100644 --- a/arch/powerpc/include/asm/book3s/64/mmu.h +++ b/arch/powerpc/include/asm/book3s/64/mmu.h @@ -19,6 +19,8 @@ struct mmu_psize_def { unsigned long sllp; /* SLB L||LP (exact mask to use in slbmte) */ }; extern struct mmu_psize_def mmu_psize_defs[MMU_PAGE_COUNT]; + +#define radix_enabled() (0) #endif /* __ASSEMBLY__ */ /* 64-bit classic hash table MMU */ diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h index 5f55024f9522..decde4c4870d 100644 --- a/arch/powerpc/include/asm/mmu.h +++ b/arch/powerpc/include/asm/mmu.h @@ -204,6 +204,9 @@ static inline void assert_pte_locked(struct mm_struct *mm, unsigned long addr) # include <asm/mmu-8xx.h> #endif +#ifndef radix_enabled +#define radix_enabled() (0) +#endif #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_MMU_H_ */ diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype index 142dff5e96d6..8d2cfb8cd64e 100644 --- a/arch/powerpc/platforms/Kconfig.cputype +++ b/arch/powerpc/platforms/Kconfig.cputype @@ -331,6 +331,15 @@ config PPC_STD_MMU_64 def_bool y depends on PPC_STD_MMU && PPC64 +config PPC_RADIX_MMU + bool "Radix MMU Support" + depends on PPC_BOOK3S_64 + default y + help + Enable support for the Power ISA 3.0 Radix style MMU. Currently this + is only implemented by IBM Power9 CPUs, if you don't have one of them + you can probably disable this. + config PPC_MMU_NOHASH def_bool y depends on !PPC_STD_MMU |