[PATCH v7 08/14] powerpc/mm: Remove CONFIG_PPC_MM_SLICES

From: Christophe Leroy
Date: Fri Jan 21 2022 - 03:43:08 EST

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@xxxxxxxxxx>
Reviewed-by: Nicholas Piggin <npiggin@xxxxxxxxx>
---
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