diff options
Diffstat (limited to 'arch/powerpc/include/asm/hugetlb.h')
| -rw-r--r-- | arch/powerpc/include/asm/hugetlb.h | 226 |
1 files changed, 40 insertions, 186 deletions
diff --git a/arch/powerpc/include/asm/hugetlb.h b/arch/powerpc/include/asm/hugetlb.h index 7f4025a6c69e..86326587e58d 100644 --- a/arch/powerpc/include/asm/hugetlb.h +++ b/arch/powerpc/include/asm/hugetlb.h @@ -1,208 +1,75 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_POWERPC_HUGETLB_H #define _ASM_POWERPC_HUGETLB_H #ifdef CONFIG_HUGETLB_PAGE #include <asm/page.h> -#include <asm-generic/hugetlb.h> - -extern struct kmem_cache *hugepte_cache; #ifdef CONFIG_PPC_BOOK3S_64 - #include <asm/book3s/64/hugetlb.h> -/* - * This should work for other subarchs too. But right now we use the - * new format only for 64bit book3s - */ -static inline pte_t *hugepd_page(hugepd_t hpd) -{ - BUG_ON(!hugepd_ok(hpd)); - /* - * We have only four bits to encode, MMU page size - */ - BUILD_BUG_ON((MMU_PAGE_COUNT - 1) > 0xf); - return __va(hpd_val(hpd) & HUGEPD_ADDR_MASK); -} - -static inline unsigned int hugepd_mmu_psize(hugepd_t hpd) -{ - return (hpd_val(hpd) & HUGEPD_SHIFT_MASK) >> 2; -} - -static inline unsigned int hugepd_shift(hugepd_t hpd) -{ - return mmu_psize_to_shift(hugepd_mmu_psize(hpd)); -} -static inline void flush_hugetlb_page(struct vm_area_struct *vma, - unsigned long vmaddr) -{ - if (radix_enabled()) - return radix__flush_hugetlb_page(vma, vmaddr); -} - -static inline void __local_flush_hugetlb_page(struct vm_area_struct *vma, - unsigned long vmaddr) -{ - if (radix_enabled()) - return radix__local_flush_hugetlb_page(vma, vmaddr); -} -#else - -static inline pte_t *hugepd_page(hugepd_t hpd) -{ - BUG_ON(!hugepd_ok(hpd)); -#ifdef CONFIG_PPC_8xx - return (pte_t *)__va(hpd_val(hpd) & - ~(_PMD_PAGE_MASK | _PMD_PRESENT_MASK)); -#else - return (pte_t *)((hpd_val(hpd) & - ~HUGEPD_SHIFT_MASK) | PD_HUGE); -#endif -} - -static inline unsigned int hugepd_shift(hugepd_t hpd) -{ -#ifdef CONFIG_PPC_8xx - return ((hpd_val(hpd) & _PMD_PAGE_MASK) >> 1) + 17; -#else - return hpd_val(hpd) & HUGEPD_SHIFT_MASK; -#endif -} - +#elif defined(CONFIG_PPC_E500) +#include <asm/nohash/hugetlb-e500.h> +#elif defined(CONFIG_PPC_8xx) +#include <asm/nohash/32/hugetlb-8xx.h> #endif /* CONFIG_PPC_BOOK3S_64 */ +extern bool hugetlb_disabled; -static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr, - unsigned pdshift) +static inline bool hugepages_supported(void) { - /* - * On FSL BookE, we have multiple higher-level table entries that - * point to the same hugepte. Just use the first one since they're all - * identical. So for that case, idx=0. - */ - unsigned long idx = 0; - - pte_t *dir = hugepd_page(hpd); -#ifndef CONFIG_PPC_FSL_BOOK3E - idx = (addr & ((1UL << pdshift) - 1)) >> hugepd_shift(hpd); -#endif - - return dir + idx; -} + if (hugetlb_disabled) + return false; -pte_t *huge_pte_offset_and_shift(struct mm_struct *mm, - unsigned long addr, unsigned *shift); + return HPAGE_SHIFT != 0; +} +#define hugepages_supported hugepages_supported -void flush_dcache_icache_hugepage(struct page *page); +void __init hugetlbpage_init_defaultsize(void); -#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_64S_HASH_MMU) && !radix_enabled()) + return slice_is_hugepage_only_range(mm, addr, len); return 0; } -#endif +#define is_hugepage_only_range is_hugepage_only_range -void book3e_hugetlb_preload(struct vm_area_struct *vma, unsigned long ea, - pte_t pte); -#ifdef CONFIG_PPC_8xx -static inline void flush_hugetlb_page(struct vm_area_struct *vma, - unsigned long vmaddr) -{ - flush_tlb_page(vma, vmaddr); -} -#else -void flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr); -#endif - -void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr, - unsigned long end, unsigned long floor, - unsigned long ceiling); - -/* - * The version of vma_mmu_pagesize() in arch/powerpc/mm/hugetlbpage.c needs - * to override the version in mm/hugetlb.c - */ -#define vma_mmu_pagesize vma_mmu_pagesize - -/* - * If the arch doesn't supply something else, assume that hugepage - * size aligned regions are ok without further preparation. - */ -static inline int prepare_hugepage_range(struct file *file, - unsigned long addr, unsigned long len) -{ - struct hstate *h = hstate_file(file); - if (len & ~huge_page_mask(h)) - return -EINVAL; - if (addr & ~huge_page_mask(h)) - return -EINVAL; - return 0; -} - -static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, - pte_t *ptep, pte_t pte) -{ - set_pte_at(mm, addr, ptep, pte); -} +#define __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT +void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, + pte_t pte, unsigned long sz); +#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm, - unsigned long addr, pte_t *ptep) + unsigned long addr, pte_t *ptep, + unsigned long sz) { -#ifdef CONFIG_PPC64 return __pte(pte_update(mm, addr, ptep, ~0UL, 0, 1)); -#else - return __pte(pte_update(ptep, ~0UL, 0)); -#endif } -static inline void huge_ptep_clear_flush(struct vm_area_struct *vma, - unsigned long addr, pte_t *ptep) +#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH +static inline pte_t huge_ptep_clear_flush(struct vm_area_struct *vma, + unsigned long addr, pte_t *ptep) { pte_t pte; - pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep); - flush_hugetlb_page(vma, addr); -} - -static inline int huge_pte_none(pte_t pte) -{ - return pte_none(pte); -} - -static inline pte_t huge_pte_wrprotect(pte_t pte) -{ - return pte_wrprotect(pte); -} + unsigned long sz = huge_page_size(hstate_vma(vma)); -static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, - unsigned long addr, pte_t *ptep, - pte_t pte, int dirty) -{ -#ifdef HUGETLB_NEED_PRELOAD - /* - * The "return 1" forces a call of update_mmu_cache, which will write a - * TLB entry. Without this, platforms that don't do a write of the TLB - * entry in the TLB miss handler asm will fault ad infinitum. - */ - ptep_set_access_flags(vma, addr, ptep, pte, dirty); - return 1; -#else - return ptep_set_access_flags(vma, addr, ptep, pte, dirty); -#endif + pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep, sz); + flush_hugetlb_page(vma, addr); + return pte; } -static inline pte_t huge_ptep_get(pte_t *ptep) -{ - return *ptep; -} +#define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS +int huge_ptep_set_access_flags(struct vm_area_struct *vma, + unsigned long addr, pte_t *ptep, + pte_t pte, int dirty); -static inline void arch_clear_hugepage_flags(struct page *page) -{ -} +void gigantic_hugetlb_cma_reserve(void) __init; +#include <asm-generic/hugetlb.h> #else /* ! CONFIG_HUGETLB_PAGE */ static inline void flush_hugetlb_page(struct vm_area_struct *vma, @@ -210,26 +77,13 @@ static inline void flush_hugetlb_page(struct vm_area_struct *vma, { } -#define hugepd_shift(x) 0 -static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr, - unsigned pdshift) +static inline void __init gigantic_hugetlb_cma_reserve(void) { - return 0; } -#endif /* CONFIG_HUGETLB_PAGE */ -/* - * FSL Book3E platforms require special gpage handling - the gpages - * are reserved early in the boot process by memblock instead of via - * the .dts as on IBM platforms. - */ -#if defined(CONFIG_HUGETLB_PAGE) && (defined(CONFIG_PPC_FSL_BOOK3E) || \ - defined(CONFIG_PPC_8xx)) -extern void __init reserve_hugetlb_gpages(void); -#else -static inline void reserve_hugetlb_gpages(void) +static inline void __init hugetlbpage_init_defaultsize(void) { } -#endif +#endif /* CONFIG_HUGETLB_PAGE */ #endif /* _ASM_POWERPC_HUGETLB_H */ |