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From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Michael Ellerman <mpe@ellerman.id.au>,
	alex@ghiti.fr
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>,
	linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
	linux-mm@kvack.org
Subject: [PATCH v2 1/9] powerpc/mm: Make slice specific to book3s/64
Date: Thu, 25 Nov 2021 09:23:23 +0100	[thread overview]
Message-ID: <235511ad0775c88f435c0046109b44c5eb390a36.1637828367.git.christophe.leroy@csgroup.eu> (raw)
In-Reply-To: <cover.1637828367.git.christophe.leroy@csgroup.eu>

Since commit 555904d07eef ("powerpc/8xx: MM_SLICE is not needed
anymore") only book3s/64 selects CONFIG_PPC_MM_SLICES.

Move slice.c into mm/book3s64/

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
v2: Remove now unnecessary #ifdef CONFIG_PPC_BOOK3S_64 in slice.c
---
 arch/powerpc/mm/Makefile               | 1 -
 arch/powerpc/mm/book3s64/Makefile      | 1 +
 arch/powerpc/mm/{ => book3s64}/slice.c | 2 --
 arch/powerpc/mm/nohash/mmu_context.c   | 9 ---------
 arch/powerpc/mm/nohash/tlb.c           | 4 ----
 5 files changed, 1 insertion(+), 16 deletions(-)
 rename arch/powerpc/mm/{ => book3s64}/slice.c (99%)

diff --git a/arch/powerpc/mm/Makefile b/arch/powerpc/mm/Makefile
index df8172da2301..d4c20484dad9 100644
--- a/arch/powerpc/mm/Makefile
+++ b/arch/powerpc/mm/Makefile
@@ -14,7 +14,6 @@ obj-$(CONFIG_PPC_MMU_NOHASH)	+= nohash/
 obj-$(CONFIG_PPC_BOOK3S_32)	+= book3s32/
 obj-$(CONFIG_PPC_BOOK3S_64)	+= book3s64/
 obj-$(CONFIG_NUMA) += numa.o
-obj-$(CONFIG_PPC_MM_SLICES)	+= slice.o
 obj-$(CONFIG_HUGETLB_PAGE)	+= hugetlbpage.o
 obj-$(CONFIG_NOT_COHERENT_CACHE) += dma-noncoherent.o
 obj-$(CONFIG_PPC_COPRO_BASE)	+= copro_fault.o
diff --git a/arch/powerpc/mm/book3s64/Makefile b/arch/powerpc/mm/book3s64/Makefile
index 1b56d3af47d4..30951668c684 100644
--- a/arch/powerpc/mm/book3s64/Makefile
+++ b/arch/powerpc/mm/book3s64/Makefile
@@ -18,6 +18,7 @@ obj-$(CONFIG_TRANSPARENT_HUGEPAGE) += hash_hugepage.o
 obj-$(CONFIG_PPC_SUBPAGE_PROT)	+= subpage_prot.o
 obj-$(CONFIG_SPAPR_TCE_IOMMU)	+= iommu_api.o
 obj-$(CONFIG_PPC_PKEY)	+= pkeys.o
+obj-$(CONFIG_PPC_MM_SLICES)	+= slice.o
 
 # Instrumenting the SLB fault path can lead to duplicate SLB entries
 KCOV_INSTRUMENT_slb.o := n
diff --git a/arch/powerpc/mm/slice.c b/arch/powerpc/mm/book3s64/slice.c
similarity index 99%
rename from arch/powerpc/mm/slice.c
rename to arch/powerpc/mm/book3s64/slice.c
index 82b45b1cb973..c83be371c6e7 100644
--- a/arch/powerpc/mm/slice.c
+++ b/arch/powerpc/mm/book3s64/slice.c
@@ -712,7 +712,6 @@ void slice_init_new_context_exec(struct mm_struct *mm)
 		bitmap_fill(mask->high_slices, SLICE_NUM_HIGH);
 }
 
-#ifdef CONFIG_PPC_BOOK3S_64
 void slice_setup_new_exec(void)
 {
 	struct mm_struct *mm = current->mm;
@@ -724,7 +723,6 @@ void slice_setup_new_exec(void)
 
 	mm_ctx_set_slb_addr_limit(&mm->context, DEFAULT_MAP_WINDOW);
 }
-#endif
 
 void slice_set_range_psize(struct mm_struct *mm, unsigned long start,
 			   unsigned long len, unsigned int psize)
diff --git a/arch/powerpc/mm/nohash/mmu_context.c b/arch/powerpc/mm/nohash/mmu_context.c
index 44b2b5e7cabe..dc3528e815b9 100644
--- a/arch/powerpc/mm/nohash/mmu_context.c
+++ b/arch/powerpc/mm/nohash/mmu_context.c
@@ -313,15 +313,6 @@ void switch_mmu_context(struct mm_struct *prev, struct mm_struct *next,
  */
 int init_new_context(struct task_struct *t, struct mm_struct *mm)
 {
-	/*
-	 * We have MMU_NO_CONTEXT set to be ~0. Hence check
-	 * explicitly against context.id == 0. This ensures that we properly
-	 * initialize context slice details for newly allocated mm's (which will
-	 * have id == 0) and don't alter context slice inherited via fork (which
-	 * will have id != 0).
-	 */
-	if (mm->context.id == 0)
-		slice_init_new_context_exec(mm);
 	mm->context.id = MMU_NO_CONTEXT;
 	mm->context.active = 0;
 	pte_frag_set(&mm->context, NULL);
diff --git a/arch/powerpc/mm/nohash/tlb.c b/arch/powerpc/mm/nohash/tlb.c
index 647bf454a0fa..cb771d9f50cb 100644
--- a/arch/powerpc/mm/nohash/tlb.c
+++ b/arch/powerpc/mm/nohash/tlb.c
@@ -782,9 +782,5 @@ void __init early_init_mmu(void)
 #ifdef CONFIG_PPC_47x
 	early_init_mmu_47x();
 #endif
-
-#ifdef CONFIG_PPC_MM_SLICES
-	mm_ctx_set_slb_addr_limit(&init_mm.context, SLB_ADDR_LIMIT_DEFAULT);
-#endif
 }
 #endif /* CONFIG_PPC64 */
-- 
2.33.1


  reply	other threads:[~2021-11-25  8:31 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-25  8:23 [PATCH v2 0/9] Convert powerpc to default topdown mmap layout Christophe Leroy
2021-11-25  8:23 ` Christophe Leroy [this message]
2021-11-25  8:23 ` [PATCH v2 2/9] powerpc/mm: Move vma_mmu_pagesize() and hugetlb_get_unmapped_area() to slice.c Christophe Leroy
2021-11-25  8:23 ` [PATCH v2 3/9] powerpc/mm: Remove CONFIG_PPC_MM_SLICES Christophe Leroy
2021-11-25  8:23 ` [PATCH v2 4/9] powerpc/mm: Remove asm/slice.h Christophe Leroy
2021-11-25  8:23 ` [PATCH v2 5/9] powerpc/mm: Call radix__arch_get_unmapped_area() from arch_get_unmapped_area() Christophe Leroy
2021-11-25  8:23 ` [PATCH v2 6/9] mm: Allow arch specific arch_randomize_brk() with CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT Christophe Leroy
2021-11-25  8:23 ` [PATCH v2 7/9] powerpc/mm: Convert to default topdown mmap layout Christophe Leroy
2021-11-25  8:23 ` [PATCH v2 8/9] powerpc/mm: Properly randomise mmap with slices Christophe Leroy
2021-11-25  8:23 ` [PATCH v2 9/9] powerpc: Simplify and move arch_randomize_brk() Christophe Leroy
2021-11-25 10:42   ` Christophe Leroy
2021-11-26  0:36   ` kernel test robot
2021-11-26 19:23   ` kernel test robot

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