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Commit 014a32b3 authored by Nicholas Piggin's avatar Nicholas Piggin Committed by Michael Ellerman
Browse files

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: default avatarNicholas Piggin <npiggin@gmail.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent d262bd5a

arch/powerpc/include/asm/hugetlb.h

+4 −4
Original line number Diff line number Diff line
@@ -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);

arch/powerpc/mm/hugetlbpage.c

+4 −2
Original line number Diff line number Diff line
@@ -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;

arch/powerpc/mm/slice.c

+4 −13
Original line number Diff line number Diff line
@@ -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