linux-kernel - [PATCH v2 10/11] powerpc/mm: define subarch SLB_ADDR_LIMIT

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Date:   Thu, 25 Apr 2019 14:29:36 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        aneesh.kumar@...ux.ibm.com
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v2 10/11] powerpc/mm: define subarch SLB_ADDR_LIMIT_DEFAULT

This patch defines a subarch specific SLB_ADDR_LIMIT_DEFAULT
to remove the #ifdefs around the setup of mm->context.slb_addr_limit

It also generalises the use of mm_ctx_set_slb_addr_limit() helper.

Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
---
 arch/powerpc/include/asm/book3s/64/slice.h | 2 ++
 arch/powerpc/include/asm/nohash/32/slice.h | 2 ++
 arch/powerpc/mm/hash_utils_64.c            | 2 +-
 arch/powerpc/mm/slice.c                    | 6 +-----
 arch/powerpc/mm/tlb_nohash.c               | 4 +---
 5 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/arch/powerpc/include/asm/book3s/64/slice.h b/arch/powerpc/include/asm/book3s/64/slice.h
index 062e11136e9c..f0d3194ba41b 100644
--- a/arch/powerpc/include/asm/book3s/64/slice.h
+++ b/arch/powerpc/include/asm/book3s/64/slice.h
@@ -11,4 +11,6 @@
 #define SLICE_NUM_HIGH		(H_PGTABLE_RANGE >> SLICE_HIGH_SHIFT)
 #define GET_HIGH_SLICE_INDEX(addr)	((addr) >> SLICE_HIGH_SHIFT)
 
+#define SLB_ADDR_LIMIT_DEFAULT	DEFAULT_MAP_WINDOW_USER64
+
 #endif /* _ASM_POWERPC_BOOK3S_64_SLICE_H */
diff --git a/arch/powerpc/include/asm/nohash/32/slice.h b/arch/powerpc/include/asm/nohash/32/slice.h
index 777d62e40ac0..39eb0154ae2d 100644
--- a/arch/powerpc/include/asm/nohash/32/slice.h
+++ b/arch/powerpc/include/asm/nohash/32/slice.h
@@ -13,6 +13,8 @@
 #define SLICE_NUM_HIGH		0ul
 #define GET_HIGH_SLICE_INDEX(addr)	(addr & 0)
 
+#define SLB_ADDR_LIMIT_DEFAULT	DEFAULT_MAP_WINDOW
+
 #endif /* CONFIG_PPC_MM_SLICES */
 
 #endif /* _ASM_POWERPC_NOHASH_32_SLICE_H */
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index f727197de713..884246e3bf0b 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -1050,7 +1050,7 @@ void __init hash__early_init_mmu(void)
 	htab_initialize();
 
 	init_mm.context.hash_context = &init_hash_mm_context;
-	init_mm.context.hash_context->slb_addr_limit = DEFAULT_MAP_WINDOW_USER64;
+	mm_ctx_set_slb_addr_limit(&init_mm.context, SLB_ADDR_LIMIT_DEFAULT);
 
 	pr_info("Initializing hash mmu with SLB\n");
 	/* Initialize SLB management */
diff --git a/arch/powerpc/mm/slice.c b/arch/powerpc/mm/slice.c
index ace97d953040..97fbf7b54422 100644
--- a/arch/powerpc/mm/slice.c
+++ b/arch/powerpc/mm/slice.c
@@ -704,11 +704,7 @@ void slice_init_new_context_exec(struct mm_struct *mm)
 	 * case of fork it is just inherited from the mm being
 	 * duplicated.
 	 */
-#ifdef CONFIG_PPC64
-	mm_ctx_set_slb_addr_limit(&mm->context, DEFAULT_MAP_WINDOW_USER64);
-#else
-	mm->context.slb_addr_limit = DEFAULT_MAP_WINDOW;
-#endif
+	mm_ctx_set_slb_addr_limit(&mm->context, SLB_ADDR_LIMIT_DEFAULT);
 	mm_ctx_set_user_psize(&mm->context, psize);
 
 	/*
diff --git a/arch/powerpc/mm/tlb_nohash.c b/arch/powerpc/mm/tlb_nohash.c
index 088e0a6b5ade..ba4bff11191f 100644
--- a/arch/powerpc/mm/tlb_nohash.c
+++ b/arch/powerpc/mm/tlb_nohash.c
@@ -802,9 +802,7 @@ void __init early_init_mmu(void)
 #endif
 
 #ifdef CONFIG_PPC_MM_SLICES
-#if defined(CONFIG_PPC_8xx)
-	init_mm.context.slb_addr_limit = DEFAULT_MAP_WINDOW;
-#endif
+	mm_ctx_set_slb_addr_limit(&init_mm.context, SLB_ADDR_LIMIT_DEFAULT);
 #endif
 }
 #endif /* CONFIG_PPC64 */
-- 
2.13.3