481e980a7c
Since commit9e343b467c("READ_ONCE: Enforce atomicity for {READ,WRITE}_ONCE() memory accesses") it is not possible anymore to use READ_ONCE() to access complex page table entries like the one defined for powerpc 8xx with 16k size pages. Define a ptep_get() helper that architectures can override instead of performing a READ_ONCE() on the page table entry pointer. Fixes:9e343b467c("READ_ONCE: Enforce atomicity for {READ,WRITE}_ONCE() memory accesses") Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Acked-by: Will Deacon <will@kernel.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/087fa12b6e920e32315136b998aa834f99242695.1592225558.git.christophe.leroy@csgroup.eu
137 lines
3 KiB
C
137 lines
3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_GENERIC_HUGETLB_H
|
|
#define _ASM_GENERIC_HUGETLB_H
|
|
|
|
static inline pte_t mk_huge_pte(struct page *page, pgprot_t pgprot)
|
|
{
|
|
return mk_pte(page, pgprot);
|
|
}
|
|
|
|
static inline unsigned long huge_pte_write(pte_t pte)
|
|
{
|
|
return pte_write(pte);
|
|
}
|
|
|
|
static inline unsigned long huge_pte_dirty(pte_t pte)
|
|
{
|
|
return pte_dirty(pte);
|
|
}
|
|
|
|
static inline pte_t huge_pte_mkwrite(pte_t pte)
|
|
{
|
|
return pte_mkwrite(pte);
|
|
}
|
|
|
|
static inline pte_t huge_pte_mkdirty(pte_t pte)
|
|
{
|
|
return pte_mkdirty(pte);
|
|
}
|
|
|
|
static inline pte_t huge_pte_modify(pte_t pte, pgprot_t newprot)
|
|
{
|
|
return pte_modify(pte, newprot);
|
|
}
|
|
|
|
#ifndef __HAVE_ARCH_HUGE_PTE_CLEAR
|
|
static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
|
|
pte_t *ptep, unsigned long sz)
|
|
{
|
|
pte_clear(mm, addr, ptep);
|
|
}
|
|
#endif
|
|
|
|
#ifndef __HAVE_ARCH_HUGETLB_FREE_PGD_RANGE
|
|
static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
|
|
unsigned long addr, unsigned long end,
|
|
unsigned long floor, unsigned long ceiling)
|
|
{
|
|
free_pgd_range(tlb, addr, end, floor, ceiling);
|
|
}
|
|
#endif
|
|
|
|
#ifndef __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT
|
|
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);
|
|
}
|
|
#endif
|
|
|
|
#ifndef __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)
|
|
{
|
|
return ptep_get_and_clear(mm, addr, ptep);
|
|
}
|
|
#endif
|
|
|
|
#ifndef __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
|
|
static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
|
|
unsigned long addr, pte_t *ptep)
|
|
{
|
|
ptep_clear_flush(vma, addr, ptep);
|
|
}
|
|
#endif
|
|
|
|
#ifndef __HAVE_ARCH_HUGE_PTE_NONE
|
|
static inline int huge_pte_none(pte_t pte)
|
|
{
|
|
return pte_none(pte);
|
|
}
|
|
#endif
|
|
|
|
#ifndef __HAVE_ARCH_HUGE_PTE_WRPROTECT
|
|
static inline pte_t huge_pte_wrprotect(pte_t pte)
|
|
{
|
|
return pte_wrprotect(pte);
|
|
}
|
|
#endif
|
|
|
|
#ifndef __HAVE_ARCH_PREPARE_HUGEPAGE_RANGE
|
|
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;
|
|
}
|
|
#endif
|
|
|
|
#ifndef __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT
|
|
static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
|
|
unsigned long addr, pte_t *ptep)
|
|
{
|
|
ptep_set_wrprotect(mm, addr, ptep);
|
|
}
|
|
#endif
|
|
|
|
#ifndef __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
|
|
static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
|
|
unsigned long addr, pte_t *ptep,
|
|
pte_t pte, int dirty)
|
|
{
|
|
return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
|
|
}
|
|
#endif
|
|
|
|
#ifndef __HAVE_ARCH_HUGE_PTEP_GET
|
|
static inline pte_t huge_ptep_get(pte_t *ptep)
|
|
{
|
|
return ptep_get(ptep);
|
|
}
|
|
#endif
|
|
|
|
#ifndef __HAVE_ARCH_GIGANTIC_PAGE_RUNTIME_SUPPORTED
|
|
static inline bool gigantic_page_runtime_supported(void)
|
|
{
|
|
return IS_ENABLED(CONFIG_ARCH_HAS_GIGANTIC_PAGE);
|
|
}
|
|
#endif /* __HAVE_ARCH_GIGANTIC_PAGE_RUNTIME_SUPPORTED */
|
|
|
|
#endif /* _ASM_GENERIC_HUGETLB_H */
|