51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
/* 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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#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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/*
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* We used gigantic page reservation with hypervisor assist in some case.
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* We cannot use runtime allocation of gigantic pages in those platforms
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* This is hash translation mode LPARs.
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*/
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if (firmware_has_feature(FW_FEATURE_LPAR) && !radix_enabled())
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return false;
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return true;
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}
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#endif
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#endif
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