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" <alex@ghiti.fr>
Cc: "will@kernel.org" <will@kernel.org>,
"catalin.marinas@arm.com" <catalin.marinas@arm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
Nicholas Piggin <npiggin@gmail.com>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: [PATCH v7 07/14] powerpc/mm: Make slice specific to book3s/64
Date: Fri, 21 Jan 2022 08:42:27 +0000 [thread overview]
Message-ID: <0291cfad5e241a98aff2241fdb6bc30368e66d8a.1642752946.git.christophe.leroy@csgroup.eu> (raw)
In-Reply-To: <cover.1642752946.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/
Move necessary stuff in asm/book3s/64/slice.h and
remove asm/slice.h
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/include/asm/book3s/64/mmu-hash.h | 1 +
arch/powerpc/include/asm/book3s/64/slice.h | 18 ++++++++
arch/powerpc/include/asm/page.h | 1 -
arch/powerpc/include/asm/slice.h | 46 -------------------
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 --
9 files changed, 20 insertions(+), 63 deletions(-)
delete mode 100644 arch/powerpc/include/asm/slice.h
rename arch/powerpc/mm/{ => book3s64}/slice.c (99%)
diff --git a/arch/powerpc/include/asm/book3s/64/mmu-hash.h b/arch/powerpc/include/asm/book3s/64/mmu-hash.h
index 21f780942911..1c4eebbc69c9 100644
--- a/arch/powerpc/include/asm/book3s/64/mmu-hash.h
+++ b/arch/powerpc/include/asm/book3s/64/mmu-hash.h
@@ -18,6 +18,7 @@
* complete pgtable.h but only a portion of it.
*/
#include <asm/book3s/64/pgtable.h>
+#include <asm/book3s/64/slice.h>
#include <asm/task_size_64.h>
#include <asm/cpu_has_feature.h>
diff --git a/arch/powerpc/include/asm/book3s/64/slice.h b/arch/powerpc/include/asm/book3s/64/slice.h
index f0d3194ba41b..5b0f7105bc8b 100644
--- a/arch/powerpc/include/asm/book3s/64/slice.h
+++ b/arch/powerpc/include/asm/book3s/64/slice.h
@@ -2,6 +2,8 @@
#ifndef _ASM_POWERPC_BOOK3S_64_SLICE_H
#define _ASM_POWERPC_BOOK3S_64_SLICE_H
+#ifndef __ASSEMBLY__
+
#define SLICE_LOW_SHIFT 28
#define SLICE_LOW_TOP (0x100000000ul)
#define SLICE_NUM_LOW (SLICE_LOW_TOP >> SLICE_LOW_SHIFT)
@@ -13,4 +15,20 @@
#define SLB_ADDR_LIMIT_DEFAULT DEFAULT_MAP_WINDOW_USER64
+struct mm_struct;
+
+unsigned long slice_get_unmapped_area(unsigned long addr, unsigned long len,
+ unsigned long flags, unsigned int psize,
+ int topdown);
+
+unsigned int get_slice_psize(struct mm_struct *mm, unsigned long addr);
+
+void slice_set_range_psize(struct mm_struct *mm, unsigned long start,
+ unsigned long len, unsigned int psize);
+
+void slice_init_new_context_exec(struct mm_struct *mm);
+void slice_setup_new_exec(void);
+
+#endif /* __ASSEMBLY__ */
+
#endif /* _ASM_POWERPC_BOOK3S_64_SLICE_H */
diff --git a/arch/powerpc/include/asm/page.h b/arch/powerpc/include/asm/page.h
index 254687258f42..62e0c6f12869 100644
--- a/arch/powerpc/include/asm/page.h
+++ b/arch/powerpc/include/asm/page.h
@@ -329,6 +329,5 @@ static inline unsigned long kaslr_offset(void)
#include <asm-generic/memory_model.h>
#endif /* __ASSEMBLY__ */
-#include <asm/slice.h>
#endif /* _ASM_POWERPC_PAGE_H */
diff --git a/arch/powerpc/include/asm/slice.h b/arch/powerpc/include/asm/slice.h
deleted file mode 100644
index 0bdd9c62eca0..000000000000
--- a/arch/powerpc/include/asm/slice.h
+++ /dev/null
@@ -1,46 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_POWERPC_SLICE_H
-#define _ASM_POWERPC_SLICE_H
-
-#ifdef CONFIG_PPC_BOOK3S_64
-#include <asm/book3s/64/slice.h>
-#endif
-
-#ifndef __ASSEMBLY__
-
-struct mm_struct;
-
-#ifdef CONFIG_PPC_MM_SLICES
-
-#ifdef CONFIG_HUGETLB_PAGE
-#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
-#endif
-#define HAVE_ARCH_UNMAPPED_AREA
-#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
-
-unsigned long slice_get_unmapped_area(unsigned long addr, unsigned long len,
- unsigned long flags, unsigned int psize,
- int topdown);
-
-unsigned int get_slice_psize(struct mm_struct *mm, unsigned long addr);
-
-void slice_set_range_psize(struct mm_struct *mm, unsigned long start,
- unsigned long len, unsigned int psize);
-
-void slice_init_new_context_exec(struct mm_struct *mm);
-void slice_setup_new_exec(void);
-
-#else /* CONFIG_PPC_MM_SLICES */
-
-static inline void slice_init_new_context_exec(struct mm_struct *mm) {}
-
-static inline unsigned int get_slice_psize(struct mm_struct *mm, unsigned long addr)
-{
- return 0;
-}
-
-#endif /* CONFIG_PPC_MM_SLICES */
-
-#endif /* __ASSEMBLY__ */
-
-#endif /* _ASM_POWERPC_SLICE_H */
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 2d50cac499c5..af2f3e75d458 100644
--- a/arch/powerpc/mm/book3s64/Makefile
+++ b/arch/powerpc/mm/book3s64/Makefile
@@ -21,6 +21,7 @@ obj-$(CONFIG_PPC_RADIX_MMU) += radix_hugetlbpage.o
endif
obj-$(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 8a3ac062b71e..e4382713746d 100644
--- a/arch/powerpc/mm/slice.c
+++ b/arch/powerpc/mm/book3s64/slice.c
@@ -692,7 +692,6 @@ 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;
@@ -704,7 +703,6 @@ 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 85b048f04c56..ccd5819b1bd9 100644
--- a/arch/powerpc/mm/nohash/mmu_context.c
+++ b/arch/powerpc/mm/nohash/mmu_context.c
@@ -317,15 +317,6 @@ 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 fd2c77af5c55..7e1e7c3dc66a 100644
--- a/arch/powerpc/mm/nohash/tlb.c
+++ b/arch/powerpc/mm/nohash/tlb.c
@@ -773,9 +773,5 @@ 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
next prev parent reply other threads:[~2022-01-21 8:45 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-21 8:42 [PATCH v7 00/14] Convert powerpc to default topdown mmap layout Christophe Leroy
2022-01-21 8:42 ` [PATCH v7 01/14] mm: Allow arch specific arch_randomize_brk() with CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT Christophe Leroy
2022-01-21 8:42 ` [PATCH v7 02/14] mm, hugetlbfs: Allow an arch to always use generic versions of get_unmapped_area functions Christophe Leroy
2022-01-21 8:42 ` [PATCH v7 03/14] mm: Add len and flags parameters to arch_get_mmap_end() Christophe Leroy
2022-01-21 8:42 ` [PATCH v7 04/14] mm, hugetlbfs: Allow for "high" userspace addresses Christophe Leroy
2022-01-21 8:42 ` [PATCH v7 05/14] sizes.h: Add SZ_1T macro Christophe Leroy
2022-02-24 15:05 ` Lorenzo Pieralisi
2022-01-21 8:42 ` [PATCH v7 06/14] powerpc/mm: Move vma_mmu_pagesize() Christophe Leroy
2022-01-21 8:42 ` Christophe Leroy [this message]
2022-01-21 8:42 ` [PATCH v7 08/14] powerpc/mm: Remove CONFIG_PPC_MM_SLICES Christophe Leroy
2022-01-21 8:42 ` [PATCH v7 09/14] powerpc/mm: Use generic_get_unmapped_area() and call it from arch_get_unmapped_area() Christophe Leroy
2022-01-21 8:42 ` [PATCH v7 10/14] powerpc/mm: Use generic_hugetlb_get_unmapped_area() Christophe Leroy
2022-01-21 8:42 ` [PATCH v7 11/14] powerpc/mm: Move get_unmapped_area functions to slice.c Christophe Leroy
2022-01-21 8:42 ` [PATCH v7 12/14] powerpc/mm: Enable full randomisation of memory mappings Christophe Leroy
2022-01-21 8:42 ` [PATCH v7 13/14] powerpc/mm: Convert to default topdown mmap layout Christophe Leroy
2022-01-21 8:42 ` [PATCH v7 14/14] powerpc: Simplify and move arch_randomize_brk() Christophe Leroy
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