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powerpc/mm/slice: remove radix calls to the slice code 

This is a tidy up which removes radix MMU calls into the slice
code.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
hifive-unleashed-5.1
Nicholas Piggin 2018-03-07 11:37:17 +10:00 committed by Michael Ellerman
parent d262bd5a73
commit 014a32b30e
3 changed files with 12 additions and 19 deletions
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8
arch/powerpc/include/asm/hugetlb.h
View File

@ -89,17 +89,17 @@ pte_t *huge_pte_offset_and_shift(struct mm_struct *mm,
void flush_dcache_icache_hugepage(struct page *page);
#if defined(CONFIG_PPC_MM_SLICES)
int is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
int slice_is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
unsigned long len);
#else
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())
return slice_is_hugepage_only_range(mm, addr, len);
return 0;
}
#endif
void book3e_hugetlb_preload(struct vm_area_struct *vma, unsigned long ea,
pte_t pte);

6
arch/powerpc/mm/hugetlbpage.c
View File

@ -565,10 +565,12 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
unsigned long vma_mmu_pagesize(struct vm_area_struct *vma)
{
#ifdef CONFIG_PPC_MM_SLICES
unsigned int psize = get_slice_psize(vma->vm_mm, vma->vm_start);
/* With radix we don't use slice, so derive it from vma*/
if (!radix_enabled())
if (!radix_enabled()) {
unsigned int psize = get_slice_psize(vma->vm_mm, vma->vm_start);
return 1UL << mmu_psize_to_shift(psize);
}
#endif
if (!is_vm_hugetlb_page(vma))
return PAGE_SIZE;

17
arch/powerpc/mm/slice.c
View File

@ -686,16 +686,8 @@ unsigned int get_slice_psize(struct mm_struct *mm, unsigned long addr)
unsigned char *psizes;
int index, mask_index;
/*
* Radix doesn't use slice, but can get enabled along with MMU_SLICE
*/
if (radix_enabled()) {
#ifdef CONFIG_PPC_64K_PAGES
return MMU_PAGE_64K;
#else
return MMU_PAGE_4K;
#endif
}
VM_BUG_ON(radix_enabled());
if (addr < SLICE_LOW_TOP) {
psizes = mm->context.low_slices_psize;
index = GET_LOW_SLICE_INDEX(addr);
@ -778,14 +770,13 @@ void slice_set_range_psize(struct mm_struct *mm, unsigned long start,
* for now as we only use slices with hugetlbfs enabled. This should
* be fixed as the generic code gets fixed.
*/
int is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
int slice_is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
unsigned long len)
{
const struct slice_mask *maskp;
unsigned int psize = mm->context.user_psize;
if (radix_enabled())
return 0;
VM_BUG_ON(radix_enabled());
maskp = slice_mask_for_size(mm, psize);
#ifdef CONFIG_PPC_64K_PAGES