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d629d7a8ef
Commit8597538712("powerpc/fadump: Do not use hugepages when fadump is active") disabled hugetlb support when fadump is active by returning early from hugetlbpage_init():arch/powerpc/mm/hugetlbpage.c and not populating hpage_shift/HPAGE_SHIFT. Later, commit2354ad252b("powerpc/mm: Update default hugetlb size early") moved the allocation of hpage_shift/HPAGE_SHIFT to early boot, which inadvertently re-enabled hugetlb support when fadump is active. Fix this by implementing hugepages_supported() on powerpc. This ensures that disabling hugetlb for the fadump kernel is independent of hpage_shift/HPAGE_SHIFT. Fixes:2354ad252b("powerpc/mm: Update default hugetlb size early") Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com> Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com> Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com> Link: https://patch.msgid.link/20241217074640.1064510-1-sourabhjain@linux.ibm.com
88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_POWERPC_HUGETLB_H
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#define _ASM_POWERPC_HUGETLB_H
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#ifdef CONFIG_HUGETLB_PAGE
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#include <asm/page.h>
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#ifdef CONFIG_PPC_BOOK3S_64
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#include <asm/book3s/64/hugetlb.h>
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#elif defined(CONFIG_PPC_E500)
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#include <asm/nohash/hugetlb-e500.h>
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#elif defined(CONFIG_PPC_8xx)
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#include <asm/nohash/32/hugetlb-8xx.h>
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#endif /* CONFIG_PPC_BOOK3S_64 */
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extern bool hugetlb_disabled;
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static inline bool hugepages_supported(void)
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{
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if (hugetlb_disabled)
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return false;
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return HPAGE_SHIFT != 0;
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}
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#define hugepages_supported hugepages_supported
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void __init hugetlbpage_init_defaultsize(void);
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int slice_is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
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unsigned long len);
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static inline int is_hugepage_only_range(struct mm_struct *mm,
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unsigned long addr,
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unsigned long len)
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{
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if (IS_ENABLED(CONFIG_PPC_64S_HASH_MMU) && !radix_enabled())
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return slice_is_hugepage_only_range(mm, addr, len);
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return 0;
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}
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#define is_hugepage_only_range is_hugepage_only_range
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#define __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT
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void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep,
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pte_t pte, unsigned long sz);
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#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
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static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
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unsigned long addr, pte_t *ptep)
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{
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return __pte(pte_update(mm, addr, ptep, ~0UL, 0, 1));
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}
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#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
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static inline pte_t huge_ptep_clear_flush(struct vm_area_struct *vma,
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unsigned long addr, pte_t *ptep)
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{
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pte_t pte;
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pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
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flush_hugetlb_page(vma, addr);
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return pte;
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}
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#define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
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int huge_ptep_set_access_flags(struct vm_area_struct *vma,
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unsigned long addr, pte_t *ptep,
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pte_t pte, int dirty);
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void gigantic_hugetlb_cma_reserve(void) __init;
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#include <asm-generic/hugetlb.h>
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#else /* ! CONFIG_HUGETLB_PAGE */
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static inline void flush_hugetlb_page(struct vm_area_struct *vma,
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unsigned long vmaddr)
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{
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}
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static inline void __init gigantic_hugetlb_cma_reserve(void)
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{
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}
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static inline void __init hugetlbpage_init_defaultsize(void)
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{
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}
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#endif /* CONFIG_HUGETLB_PAGE */
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#endif /* _ASM_POWERPC_HUGETLB_H */
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