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powerpc/mm: Eliminate not possible mmu features at compile time 

Depending on the CONFIG selected, many of the MMU features are
not possible. Lets only get the possible ones in MMU_FTRS_POSSIBLE.

This allows gcc to get rid at compile time of code related to
not possible features.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy 2018-11-16 17:08:03 +00:00 committed by Michael Ellerman
parent 8a01960fb5
commit 712877f874
1 changed files with 26 additions and 5 deletions
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31
arch/powerpc/include/asm/mmu.h
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@ -131,16 +131,37 @@ 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_FTRS_POSSIBLE =
#ifdef CONFIG_PPC_BOOK3S
MMU_FTR_HPTE_TABLE |
#endif
#ifdef CONFIG_PPC_8xx
MMU_FTR_TYPE_8xx |
#endif
#ifdef CONFIG_40x
MMU_FTR_TYPE_40x |
#endif
#ifdef CONFIG_44x
MMU_FTR_TYPE_44x |
#endif
#if defined(CONFIG_E200) || defined(CONFIG_E500)
MMU_FTR_TYPE_FSL_E | MMU_FTR_BIG_PHYS | MMU_FTR_USE_TLBILX |
#endif
#ifdef CONFIG_PPC_47x
MMU_FTR_TYPE_47x | MMU_FTR_USE_TLBIVAX_BCAST | MMU_FTR_LOCK_BCAST_INVAL |
#endif
#ifdef CONFIG_PPC_BOOK3S_32
MMU_FTR_USE_HIGH_BATS | MMU_FTR_NEED_DTLB_SW_LRU |
#endif
#ifdef CONFIG_PPC_BOOK3E_64
MMU_FTR_USE_TLBRSRV | MMU_FTR_USE_PAIRED_MAS |
#endif
#ifdef CONFIG_PPC_BOOK3S_64
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 | MMU_FTR_TLBIE_CROP_VA |
MMU_FTR_KERNEL_RO | MMU_FTR_68_BIT_VA |
#endif
#ifdef CONFIG_PPC_RADIX_MMU
MMU_FTR_TYPE_RADIX |
#endif