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Commit 8a6c697b authored by Aneesh Kumar K.V's avatar Aneesh Kumar K.V Committed by Michael Ellerman
Browse files

powerpc/mm: Implement helpers for pagetable fragment support at PMD level 



Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 0c4d2680

arch/powerpc/include/asm/book3s/64/hash-4k.h

+2 −0
Original line number Diff line number Diff line
@@ -42,6 +42,8 @@ 
/* 8 bytes per each pte entry */

#define H_PTE_FRAG_SIZE_SHIFT  (H_PTE_INDEX_SIZE + 3)

#define H_PTE_FRAG_NR	(PAGE_SIZE >> H_PTE_FRAG_SIZE_SHIFT)

#define H_PMD_FRAG_SIZE_SHIFT  (H_PMD_INDEX_SIZE + 3)

#define H_PMD_FRAG_NR	(PAGE_SIZE >> H_PMD_FRAG_SIZE_SHIFT)



/* memory key bits, only 8 keys supported */

#define H_PTE_PKEY_BIT0	0

arch/powerpc/include/asm/book3s/64/hash-64k.h

+7 −0
Original line number Diff line number Diff line
@@ -46,6 +46,13 @@ 
#define H_PTE_FRAG_SIZE_SHIFT  (H_PTE_INDEX_SIZE + 3 + 1)

#define H_PTE_FRAG_NR	(PAGE_SIZE >> H_PTE_FRAG_SIZE_SHIFT)



#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLB_PAGE)

#define H_PMD_FRAG_SIZE_SHIFT  (H_PMD_INDEX_SIZE + 3 + 1)

#else

#define H_PMD_FRAG_SIZE_SHIFT  (H_PMD_INDEX_SIZE + 3)

#endif

#define H_PMD_FRAG_NR	(PAGE_SIZE >> H_PMD_FRAG_SIZE_SHIFT)



#ifndef __ASSEMBLY__

#include <asm/errno.h>

arch/powerpc/include/asm/book3s/64/mmu.h

+1 −0
Original line number Diff line number Diff line
@@ -138,6 +138,7 @@ typedef struct { 
	 * pagetable fragment support

	 */

	void *pte_frag;

	void *pmd_frag;

#ifdef CONFIG_SPAPR_TCE_IOMMU

	struct list_head iommu_group_mem_list;

#endif

arch/powerpc/include/asm/book3s/64/pgalloc.h

+2 −0
Original line number Diff line number Diff line
@@ -42,7 +42,9 @@ extern struct kmem_cache *pgtable_cache[]; 
		})



extern pte_t *pte_fragment_alloc(struct mm_struct *, unsigned long, int);

extern pmd_t *pmd_fragment_alloc(struct mm_struct *, unsigned long);

extern void pte_fragment_free(unsigned long *, int);

extern void pmd_fragment_free(unsigned long *);

extern void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift);

#ifdef CONFIG_SMP

extern void __tlb_remove_table(void *_table);

arch/powerpc/include/asm/book3s/64/pgtable.h

+6 −0
Original line number Diff line number Diff line
@@ -246,6 +246,12 @@ extern unsigned long __pte_frag_size_shift; 
#define PTE_FRAG_SIZE_SHIFT __pte_frag_size_shift

#define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT)



extern unsigned long __pmd_frag_nr;

#define PMD_FRAG_NR __pmd_frag_nr

extern unsigned long __pmd_frag_size_shift;

#define PMD_FRAG_SIZE_SHIFT __pmd_frag_size_shift

#define PMD_FRAG_SIZE (1UL << PMD_FRAG_SIZE_SHIFT)



#define PTRS_PER_PTE	(1 << PTE_INDEX_SIZE)

#define PTRS_PER_PMD	(1 << PMD_INDEX_SIZE)

#define PTRS_PER_PUD	(1 << PUD_INDEX_SIZE)