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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" <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 08/14] powerpc/mm: Remove CONFIG_PPC_MM_SLICES
Date: Fri, 21 Jan 2022 08:42:30 +0000	[thread overview]
Message-ID: <3e4c787053bfe6f9d566711a8fc486d7235334c5.1642752946.git.christophe.leroy@csgroup.eu> (raw)
In-Reply-To: <cover.1642752946.git.christophe.leroy@csgroup.eu>

CONFIG_PPC_MM_SLICES is always selected by hash book3s/64.
CONFIG_PPC_MM_SLICES is never selected by other platforms.

Remove it.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
---
 arch/powerpc/include/asm/hugetlb.h     |  2 +-
 arch/powerpc/include/asm/paca.h        |  7 -------
 arch/powerpc/kernel/paca.c             |  5 -----
 arch/powerpc/mm/book3s64/Makefile      |  3 +--
 arch/powerpc/mm/book3s64/hash_utils.c  | 14 --------------
 arch/powerpc/mm/hugetlbpage.c          |  2 +-
 arch/powerpc/mm/mmap.c                 |  4 ++--
 arch/powerpc/platforms/Kconfig.cputype |  4 ----
 8 files changed, 5 insertions(+), 36 deletions(-)

diff --git a/arch/powerpc/include/asm/hugetlb.h b/arch/powerpc/include/asm/hugetlb.h
index 962708fa1017..46e0b9dc77bf 100644
--- a/arch/powerpc/include/asm/hugetlb.h
+++ b/arch/powerpc/include/asm/hugetlb.h
@@ -24,7 +24,7 @@ static inline int is_hugepage_only_range(struct mm_struct *mm,
 					 unsigned long addr,
 					 unsigned long len)
 {
-	if (IS_ENABLED(CONFIG_PPC_MM_SLICES) && !radix_enabled())
+	if (IS_ENABLED(CONFIG_PPC_64S_HASH_MMU) && !radix_enabled())
 		return slice_is_hugepage_only_range(mm, addr, len);
 	return 0;
 }
diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h
index 295573a82c66..bd4dd02e61c8 100644
--- a/arch/powerpc/include/asm/paca.h
+++ b/arch/powerpc/include/asm/paca.h
@@ -152,16 +152,9 @@ struct paca_struct {
 	struct tlb_core_data tcd;
 #endif /* CONFIG_PPC_BOOK3E */
 
-#ifdef CONFIG_PPC_BOOK3S
 #ifdef CONFIG_PPC_64S_HASH_MMU
-#ifdef CONFIG_PPC_MM_SLICES
 	unsigned char mm_ctx_low_slices_psize[BITS_PER_LONG / BITS_PER_BYTE];
 	unsigned char mm_ctx_high_slices_psize[SLICE_ARRAY_SIZE];
-#else
-	u16 mm_ctx_user_psize;
-	u16 mm_ctx_sllp;
-#endif
-#endif
 #endif
 
 	/*
diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c
index 39da688a9455..ba593fd60124 100644
--- a/arch/powerpc/kernel/paca.c
+++ b/arch/powerpc/kernel/paca.c
@@ -344,15 +344,10 @@ void copy_mm_to_paca(struct mm_struct *mm)
 {
 	mm_context_t *context = &mm->context;
 
-#ifdef CONFIG_PPC_MM_SLICES
 	VM_BUG_ON(!mm_ctx_slb_addr_limit(context));
 	memcpy(&get_paca()->mm_ctx_low_slices_psize, mm_ctx_low_slices(context),
 	       LOW_SLICE_ARRAY_SZ);
 	memcpy(&get_paca()->mm_ctx_high_slices_psize, mm_ctx_high_slices(context),
 	       TASK_SLICE_ARRAY_SZ(context));
-#else /* CONFIG_PPC_MM_SLICES */
-	get_paca()->mm_ctx_user_psize = context->user_psize;
-	get_paca()->mm_ctx_sllp = context->sllp;
-#endif
 }
 #endif /* CONFIG_PPC_64S_HASH_MMU */
diff --git a/arch/powerpc/mm/book3s64/Makefile b/arch/powerpc/mm/book3s64/Makefile
index af2f3e75d458..d527dc8e30a8 100644
--- a/arch/powerpc/mm/book3s64/Makefile
+++ b/arch/powerpc/mm/book3s64/Makefile
@@ -5,7 +5,7 @@ ccflags-y	:= $(NO_MINIMAL_TOC)
 obj-y				+= mmu_context.o pgtable.o trace.o
 ifdef CONFIG_PPC_64S_HASH_MMU
 CFLAGS_REMOVE_slb.o = $(CC_FLAGS_FTRACE)
-obj-y				+= hash_pgtable.o hash_utils.o hash_tlb.o slb.o
+obj-y				+= hash_pgtable.o hash_utils.o hash_tlb.o slb.o slice.o
 obj-$(CONFIG_PPC_HASH_MMU_NATIVE)	+= hash_native.o
 obj-$(CONFIG_PPC_4K_PAGES)	+= hash_4k.o
 obj-$(CONFIG_PPC_64K_PAGES)	+= hash_64k.o
@@ -21,7 +21,6 @@ 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/book3s64/hash_utils.c b/arch/powerpc/mm/book3s64/hash_utils.c
index 7abf82a698d3..154a5a860959 100644
--- a/arch/powerpc/mm/book3s64/hash_utils.c
+++ b/arch/powerpc/mm/book3s64/hash_utils.c
@@ -1264,7 +1264,6 @@ unsigned int hash_page_do_lazy_icache(unsigned int pp, pte_t pte, int trap)
 	return pp;
 }
 
-#ifdef CONFIG_PPC_MM_SLICES
 static unsigned int get_paca_psize(unsigned long addr)
 {
 	unsigned char *psizes;
@@ -1281,12 +1280,6 @@ static unsigned int get_paca_psize(unsigned long addr)
 	return (psizes[index >> 1] >> (mask_index * 4)) & 0xF;
 }
 
-#else
-unsigned int get_paca_psize(unsigned long addr)
-{
-	return get_paca()->mm_ctx_user_psize;
-}
-#endif
 
 /*
  * Demote a segment to using 4k pages.
@@ -1710,7 +1703,6 @@ DEFINE_INTERRUPT_HANDLER_RAW(do_hash_fault)
 	return 0;
 }
 
-#ifdef CONFIG_PPC_MM_SLICES
 static bool should_hash_preload(struct mm_struct *mm, unsigned long ea)
 {
 	int psize = get_slice_psize(mm, ea);
@@ -1727,12 +1719,6 @@ static bool should_hash_preload(struct mm_struct *mm, unsigned long ea)
 
 	return true;
 }
-#else
-static bool should_hash_preload(struct mm_struct *mm, unsigned long ea)
-{
-	return true;
-}
-#endif
 
 static void hash_preload(struct mm_struct *mm, pte_t *ptep, unsigned long ea,
 			 bool is_exec, unsigned long trap)
diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c
index 0eec3b61bd13..f18b3a1d18f0 100644
--- a/arch/powerpc/mm/hugetlbpage.c
+++ b/arch/powerpc/mm/hugetlbpage.c
@@ -558,7 +558,7 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
 		return radix__hugetlb_get_unmapped_area(file, addr, len,
 						       pgoff, flags);
 #endif
-#ifdef CONFIG_PPC_MM_SLICES
+#ifdef CONFIG_PPC_64S_HASH_MMU
 	return slice_get_unmapped_area(addr, len, flags, file_to_psize(file), 1);
 #endif
 	BUG();
diff --git a/arch/powerpc/mm/mmap.c b/arch/powerpc/mm/mmap.c
index c475cf810aa8..9b0d6e395bc0 100644
--- a/arch/powerpc/mm/mmap.c
+++ b/arch/powerpc/mm/mmap.c
@@ -190,7 +190,7 @@ unsigned long arch_get_unmapped_area(struct file *filp,
 				     unsigned long pgoff,
 				     unsigned long flags)
 {
-#ifdef CONFIG_PPC_MM_SLICES
+#ifdef CONFIG_PPC_64S_HASH_MMU
 	return slice_get_unmapped_area(addr, len, flags,
 				       mm_ctx_user_psize(&current->mm->context), 0);
 #else
@@ -204,7 +204,7 @@ unsigned long arch_get_unmapped_area_topdown(struct file *filp,
 					     const unsigned long pgoff,
 					     const unsigned long flags)
 {
-#ifdef CONFIG_PPC_MM_SLICES
+#ifdef CONFIG_PPC_64S_HASH_MMU
 	return slice_get_unmapped_area(addr0, len, flags,
 				       mm_ctx_user_psize(&current->mm->context), 1);
 #else
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index 87bc1929ee5a..c775b566e7b4 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -376,7 +376,6 @@ config SPE
 config PPC_64S_HASH_MMU
 	bool "Hash MMU Support"
 	depends on PPC_BOOK3S_64
-	select PPC_MM_SLICES
 	default y
 	help
 	  Enable support for the Power ISA Hash style MMU. This is implemented
@@ -450,9 +449,6 @@ config PPC_BOOK3E_MMU
 	def_bool y
 	depends on FSL_BOOKE || PPC_BOOK3E
 
-config PPC_MM_SLICES
-	bool
-
 config PPC_HAVE_PMU_SUPPORT
 	bool
 
-- 
2.33.1

  parent reply	other threads:[~2022-01-21  8:46 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 ` [PATCH v7 07/14] powerpc/mm: Make slice specific to book3s/64 Christophe Leroy
2022-01-21  8:42 ` Christophe Leroy [this message]
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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