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powerpc/mm: move slice_mask_for_size() into mmu.h 

Move slice_mask_for_size() into subarch mmu.h

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
[mpe: Retain the BUG_ON()s, rather than converting to VM_BUG_ON()]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy 2019-04-25 14:29:30 +00:00 committed by Michael Ellerman
parent 6f60cc98df
commit fca5c1e9eb
3 changed files with 46 additions and 47 deletions
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17
arch/powerpc/include/asm/book3s/64/mmu.h
View File

@ -203,6 +203,23 @@ static inline struct slice_mask *mm_ctx_slice_mask_16g(mm_context_t *ctx)
}
#endif
static inline struct slice_mask *slice_mask_for_size(mm_context_t *ctx, int psize)
{
#ifdef CONFIG_PPC_64K_PAGES
if (psize == MMU_PAGE_64K)
return mm_ctx_slice_mask_64k(&ctx);
#endif
#ifdef CONFIG_HUGETLB_PAGE
if (psize == MMU_PAGE_16M)
return mm_ctx_slice_mask_16m(&ctx);
if (psize == MMU_PAGE_16G)
return mm_ctx_slice_mask_16g(&ctx);
#endif
BUG_ON(psize != MMU_PAGE_4K);
return mm_ctx_slice_mask_4k(&ctx);
}
#ifdef CONFIG_PPC_SUBPAGE_PROT
static inline struct subpage_prot_table *mm_ctx_subpage_prot(mm_context_t *ctx)
{

42
arch/powerpc/include/asm/nohash/32/mmu-8xx.h
View File

@ -184,7 +184,23 @@
#define LOW_SLICE_ARRAY_SZ SLICE_ARRAY_SIZE
#endif
#if defined(CONFIG_PPC_4K_PAGES)
#define mmu_virtual_psize MMU_PAGE_4K
#elif defined(CONFIG_PPC_16K_PAGES)
#define mmu_virtual_psize MMU_PAGE_16K
#define PTE_FRAG_NR 4
#define PTE_FRAG_SIZE_SHIFT 12
#define PTE_FRAG_SIZE (1UL << 12)
#else
#error "Unsupported PAGE_SIZE"
#endif
#define mmu_linear_psize MMU_PAGE_8M
#ifndef __ASSEMBLY__
#include <linux/mmdebug.h>
struct slice_mask {
u64 low_slices;
DECLARE_BITMAP(high_slices, 0);
@ -255,6 +271,19 @@ static inline struct slice_mask *mm_ctx_slice_mask_8m(mm_context_t *ctx)
return &ctx->mask_8m;
}
#endif
static inline struct slice_mask *slice_mask_for_size(mm_context_t *ctx, int psize)
{
#ifdef CONFIG_HUGETLB_PAGE
if (psize == MMU_PAGE_512K)
return &ctx->mask_512k;
if (psize == MMU_PAGE_8M)
return &ctx->mask_8m;
#endif
BUG_ON(psize != mmu_virtual_psize);
return &ctx->mask_base_psize;
}
#endif /* CONFIG_PPC_MM_SLICE */
#define PHYS_IMMR_BASE (mfspr(SPRN_IMMR) & 0xfff80000)
@ -306,17 +335,4 @@ extern s32 patch__itlbmiss_perf, patch__dtlbmiss_perf;
#endif /* !__ASSEMBLY__ */
#if defined(CONFIG_PPC_4K_PAGES)
#define mmu_virtual_psize MMU_PAGE_4K
#elif defined(CONFIG_PPC_16K_PAGES)
#define mmu_virtual_psize MMU_PAGE_16K
#define PTE_FRAG_NR 4
#define PTE_FRAG_SIZE_SHIFT 12
#define PTE_FRAG_SIZE (1UL << 12)
#else
#error "Unsupported PAGE_SIZE"
#endif
#define mmu_linear_psize MMU_PAGE_8M
#endif /* _ASM_POWERPC_MMU_8XX_H_ */

34
arch/powerpc/mm/slice.c
View File

@ -150,40 +150,6 @@ static void slice_mask_for_free(struct mm_struct *mm, struct slice_mask *ret,
__set_bit(i, ret->high_slices);
}
#ifdef CONFIG_PPC_BOOK3S_64
static struct slice_mask *slice_mask_for_size(mm_context_t *ctx, int psize)
{
#ifdef CONFIG_PPC_64K_PAGES
if (psize == MMU_PAGE_64K)
return mm_ctx_slice_mask_64k(&ctx);
#endif
if (psize == MMU_PAGE_4K)
return mm_ctx_slice_mask_4k(&ctx);
#ifdef CONFIG_HUGETLB_PAGE
if (psize == MMU_PAGE_16M)
return mm_ctx_slice_mask_16m(&ctx);
if (psize == MMU_PAGE_16G)
return mm_ctx_slice_mask_16g(&ctx);
#endif
BUG();
}
#elif defined(CONFIG_PPC_8xx)
static struct slice_mask *slice_mask_for_size(mm_context_t *ctx, int psize)
{
if (psize == mmu_virtual_psize)
return &ctx->mask_base_psize;
#ifdef CONFIG_HUGETLB_PAGE
if (psize == MMU_PAGE_512K)
return &ctx->mask_512k;
if (psize == MMU_PAGE_8M)
return &ctx->mask_8m;
#endif
BUG();
}
#else
#error "Must define the slice masks for page sizes supported by the platform"
#endif
static bool slice_check_range_fits(struct mm_struct *mm,
const struct slice_mask *available,
unsigned long start, unsigned long len)