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authorChristophe Leroy <christophe.leroy@c-s.fr>2018-11-16 17:08:03 +0000
committerMichael Ellerman <mpe@ellerman.id.au>2018-12-19 18:56:32 +1100
commit712877f8740471d96f703647d813d8a74fccc816 (patch)
tree11363e266f9ac4220a62d2c0493f064da64fc7eb
parent8a01960fb5bd95b920657133de52259227ee6ad7 (diff)
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>
-rw-r--r--arch/powerpc/include/asm/mmu.h31
1 files changed, 26 insertions, 5 deletions
diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h
index 9667921bf420..25607604a7a5 100644
--- a/arch/powerpc/include/asm/mmu.h
+++ b/arch/powerpc/include/asm/mmu.h
@@ -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