linux-kernel - [PATCH v1 22/27] powerpc/mm: move slice_mask_for

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Message-Id: <631fc88138cf384c94879d70c133b1260b0e0b96.1553076180.git.christophe.leroy@c-s.fr>
Date:   Wed, 20 Mar 2019 10:06:58 +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 v1 22/27] powerpc/mm: move slice_mask_for_size() into mmu.h

Move slice_mask_for_size() into subarch mmu.h

Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
---
 arch/powerpc/include/asm/book3s/64/mmu.h     | 22 +++++++++++++----
 arch/powerpc/include/asm/nohash/32/mmu-8xx.h | 18 ++++++++++++++
 arch/powerpc/mm/slice.c                      | 36 ----------------------------
 3 files changed, 36 insertions(+), 40 deletions(-)

diff --git a/arch/powerpc/include/asm/book3s/64/mmu.h b/arch/powerpc/include/asm/book3s/64/mmu.h
index 1ceee000c18d..927e3714b0d8 100644
--- a/arch/powerpc/include/asm/book3s/64/mmu.h
+++ b/arch/powerpc/include/asm/book3s/64/mmu.h
@@ -123,7 +123,6 @@ typedef struct {
 	/* NPU NMMU context */
 	struct npu_context *npu_context;
 
-#ifdef CONFIG_PPC_MM_SLICES
 	 /* SLB page size encodings*/
 	unsigned char low_slices_psize[BITS_PER_LONG / BITS_PER_BYTE];
 	unsigned char high_slices_psize[SLICE_ARRAY_SIZE];
@@ -136,9 +135,6 @@ typedef struct {
 	struct slice_mask mask_16m;
 	struct slice_mask mask_16g;
 # endif
-#else
-	u16 sllp;		/* SLB page size encoding */
-#endif
 	unsigned long vdso_base;
 #ifdef CONFIG_PPC_SUBPAGE_PROT
 	struct subpage_prot_table spt;
@@ -172,6 +168,24 @@ extern int mmu_vmalloc_psize;
 extern int mmu_vmemmap_psize;
 extern int mmu_io_psize;
 
+static inline struct slice_mask *slice_mask_for_size(mm_context_t *ctx, int psize)
+{
+#ifdef CONFIG_PPC_64K_PAGES
+	if (psize == MMU_PAGE_64K)
+		return &ctx->mask_64k;
+#endif
+	if (psize == MMU_PAGE_4K)
+		return &ctx->mask_4k;
+#ifdef CONFIG_HUGETLB_PAGE
+	if (psize == MMU_PAGE_16M)
+		return &ctx->mask_16m;
+	if (psize == MMU_PAGE_16G)
+		return &ctx->mask_16g;
+#endif
+	WARN_ON(true);
+	return NULL;
+}
+
 /* MMU initialization */
 void mmu_early_init_devtree(void);
 void hash__early_init_devtree(void);
diff --git a/arch/powerpc/include/asm/nohash/32/mmu-8xx.h b/arch/powerpc/include/asm/nohash/32/mmu-8xx.h
index 0a1a3fc54e54..4ba92c48b3a5 100644
--- a/arch/powerpc/include/asm/nohash/32/mmu-8xx.h
+++ b/arch/powerpc/include/asm/nohash/32/mmu-8xx.h
@@ -255,4 +255,22 @@ extern s32 patch__itlbmiss_perf, patch__dtlbmiss_perf;
 
 #define mmu_linear_psize	MMU_PAGE_8M
 
+#ifndef __ASSEMBLY__
+#ifdef CONFIG_PPC_MM_SLICES
+static inline struct slice_mask *slice_mask_for_size(mm_context_t *ctx, int psize)
+{
+	if (psize == mmu_virtual_psize)
+		return &ctx->mask_base_psize;
+#ifdef CONFIG_HUGETLB_PAGE
+	if (psize == MMU_PAGE_512K)
+		return &ctx->mask_512k;
+	if (psize == MMU_PAGE_8M)
+		return &ctx->mask_8m;
+#endif
+	WARN_ON(true);
+	return NULL;
+}
+#endif
+#endif /* !__ASSEMBLY__ */
+
 #endif /* _ASM_POWERPC_MMU_8XX_H_ */
diff --git a/arch/powerpc/mm/slice.c b/arch/powerpc/mm/slice.c
index 231fd88d97e2..357d64e14757 100644
--- a/arch/powerpc/mm/slice.c
+++ b/arch/powerpc/mm/slice.c
@@ -126,42 +126,6 @@ static void slice_mask_for_free(struct mm_struct *mm, struct slice_mask *ret,
 			__set_bit(i, ret->high_slices);
 }
 
-#ifdef CONFIG_PPC_BOOK3S_64
-static struct slice_mask *slice_mask_for_size(mm_context_t *ctx, int psize)
-{
-#ifdef CONFIG_PPC_64K_PAGES
-	if (psize == MMU_PAGE_64K)
-		return &ctx->mask_64k;
-#endif
-	if (psize == MMU_PAGE_4K)
-		return &ctx->mask_4k;
-#ifdef CONFIG_HUGETLB_PAGE
-	if (psize == MMU_PAGE_16M)
-		return &ctx->mask_16m;
-	if (psize == MMU_PAGE_16G)
-		return &ctx->mask_16g;
-#endif
-	WARN_ON(true);
-	return NULL;
-}
-#elif defined(CONFIG_PPC_8xx)
-static struct slice_mask *slice_mask_for_size(mm_context_t *ctx, int psize)
-{
-	if (psize == mmu_virtual_psize)
-		return &ctx->mask_base_psize;
-#ifdef CONFIG_HUGETLB_PAGE
-	if (psize == MMU_PAGE_512K)
-		return &ctx->mask_512k;
-	if (psize == MMU_PAGE_8M)
-		return &ctx->mask_8m;
-#endif
-	WARN_ON(true);
-	return NULL;
-}
-#else
-#error "Must define the slice masks for page sizes supported by the platform"
-#endif
-
 static bool slice_check_range_fits(struct mm_struct *mm,
 			   const struct slice_mask *available,
 			   unsigned long start, unsigned long len)
-- 
2.13.3