mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-24 12:44:11 +08:00
be51e3fde5
Patch series "mm/hugetlb: Add some new generic fallbacks", v3. This series adds the following new generic fallbacks. Before that it drops __HAVE_ARCH_HUGE_PTEP_GET from arm64 platform. 1. is_hugepage_only_range() 2. arch_clear_hugepage_flags() After this arm (32 bit) remains the sole platform defining it's own huge_ptep_get() via __HAVE_ARCH_HUGE_PTEP_GET. This patch (of 3): Platform specific huge_ptep_get() is required only when fetching the huge PTE involves more than just dereferencing the page table pointer. This is not the case on arm64 platform. Hence huge_ptep_pte() can be dropped along with it's __HAVE_ARCH_HUGE_PTEP_GET subscription. Before that, it updates the generic huge_ptep_get() with READ_ONCE() which will prevent known page table issues with THP on arm64. Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Rich Felker <dalias@libc.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Link: http://lkml.kernel.org/r/1588907271-11920-1-git-send-email-anshuman.khandual@arm.com Link: http://lkml.kernel.org/r//1506527369-19535-1-git-send-email-will.deacon@arm.com/ Link: http://lkml.kernel.org/r/1588907271-11920-2-git-send-email-anshuman.khandual@arm.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
137 lines
3.0 KiB
C
137 lines
3.0 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 READ_ONCE(*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 */
|