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powerpc/mm/nohash: MM_SLICE is only used by book3s 64

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BOOKE code is dead code as per the Kconfig details. So make it simpler
by enabling MM_SLICE only for book3s_64. The changes w.r.t nohash is just
removing deadcode. W.r.t ppc64, 4k without hugetlb will now enable MM_SLICE.
But that is good, because we reduce one extra variant which probably is not
getting tested much.

Reviewed-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Aneesh Kumar K.V 2017-03-21 22:59:51 +05:30 committed by Michael Ellerman
parent adec9a2e7c
commit b42279f016
5 changed files with 1 additions and 23 deletions
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5
arch/powerpc/include/asm/mmu-book3e.h
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@ -229,11 +229,6 @@ typedef struct {
unsigned int id;
unsigned int active;
unsigned long vdso_base;
#ifdef CONFIG_PPC_MM_SLICES
u64 low_slices_psize; /* SLB page size encodings */
u64 high_slices_psize; /* 4 bits per slice for now */
u16 user_psize; /* page size index */
#endif
#ifdef CONFIG_PPC_64K_PAGES
/* for 4K PTE fragment support */
void *pte_frag;

5
arch/powerpc/include/asm/nohash/64/pgtable.h
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@ -88,11 +88,6 @@
#include <asm/nohash/pte-book3e.h>
#include <asm/pte-common.h>
#ifdef CONFIG_PPC_MM_SLICES
#define HAVE_ARCH_UNMAPPED_AREA
#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
#endif /* CONFIG_PPC_MM_SLICES */
#ifndef __ASSEMBLY__
/* pte_clear moved to later in this file */

7
arch/powerpc/mm/hugetlbpage-book3e.c
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@ -148,16 +148,9 @@ void book3e_hugetlb_preload(struct vm_area_struct *vma, unsigned long ea,
mm = vma->vm_mm;
#ifdef CONFIG_PPC_MM_SLICES
psize = get_slice_psize(mm, ea);
tsize = mmu_get_tsize(psize);
shift = mmu_psize_defs[psize].shift;
#else
psize = vma_mmu_pagesize(vma);
shift = __ilog2(psize);
tsize = shift - 10;
#endif
/*
* We can't be interrupted while we're setting up the MAS
* regusters or after we've confirmed that no tlb exists.

5
arch/powerpc/mm/mmu_context_nohash.c
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@ -333,11 +333,6 @@ int init_new_context(struct task_struct *t, struct mm_struct *mm)
mm->context.id = MMU_NO_CONTEXT;
mm->context.active = 0;
#ifdef CONFIG_PPC_MM_SLICES
slice_set_user_psize(mm, mmu_virtual_psize);
#endif
return 0;
}

2
arch/powerpc/platforms/Kconfig.cputype
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@ -359,7 +359,7 @@ config PPC_BOOK3E_MMU
config PPC_MM_SLICES
bool
default y if (!PPC_FSL_BOOK3E && PPC64 && HUGETLB_PAGE) || (PPC_STD_MMU_64 && PPC_64K_PAGES)
default y if PPC_STD_MMU_64
default n
config PPC_HAVE_PMU_SUPPORT