63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_POWERPC_BOOK3S_64_HUGETLB_H
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#define _ASM_POWERPC_BOOK3S_64_HUGETLB_H
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/*
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* For radix we want generic code to handle hugetlb. But then if we want
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* both hash and radix to be enabled together we need to workaround the
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* limitations.
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*/
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void radix__flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
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void radix__local_flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
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extern unsigned long
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radix__hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
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unsigned long len, unsigned long pgoff,
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unsigned long flags);
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static inline int hstate_get_psize(struct hstate *hstate)
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{
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unsigned long shift;
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shift = huge_page_shift(hstate);
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if (shift == mmu_psize_defs[MMU_PAGE_2M].shift)
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return MMU_PAGE_2M;
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else if (shift == mmu_psize_defs[MMU_PAGE_1G].shift)
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return MMU_PAGE_1G;
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else if (shift == mmu_psize_defs[MMU_PAGE_16M].shift)
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return MMU_PAGE_16M;
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else if (shift == mmu_psize_defs[MMU_PAGE_16G].shift)
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return MMU_PAGE_16G;
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else {
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WARN(1, "Wrong huge page shift\n");
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return mmu_virtual_psize;
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}
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}
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#define arch_make_huge_pte arch_make_huge_pte
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static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
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struct page *page, int writable)
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{
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unsigned long page_shift;
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if (!cpu_has_feature(CPU_FTR_POWER9_DD1))
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return entry;
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page_shift = huge_page_shift(hstate_vma(vma));
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/*
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* We don't support 1G hugetlb pages yet.
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*/
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VM_WARN_ON(page_shift == mmu_psize_defs[MMU_PAGE_1G].shift);
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if (page_shift == mmu_psize_defs[MMU_PAGE_2M].shift)
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return __pte(pte_val(entry) | R_PAGE_LARGE);
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else
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return entry;
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}
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#ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE
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static inline bool gigantic_page_supported(void)
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{
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return true;
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}
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#endif
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#endif
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