02410ac72a
In order to fix a bug, arm64 needs to be told the size of the huge page
for which the huge_pte is being cleared in huge_ptep_get_and_clear().
Provide for this by adding an `unsigned long sz` parameter to the
function. This follows the same pattern as huge_pte_clear() and
set_huge_pte_at().
This commit makes the required interface modifications to the core mm as
well as all arches that implement this function (arm64, loongarch, mips,
parisc, powerpc, riscv, s390, sparc). The actual arm64 bug will be fixed
in a separate commit.
Cc: stable@vger.kernel.org
Fixes: 66b3923a1a ("arm64: hugetlb: add support for PTE contiguous bit")
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com> # riscv
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Ryan Roberts <ryan.roberts@arm.com>
Acked-by: Alexander Gordeev <agordeev@linux.ibm.com> # s390
Link: https://lore.kernel.org/r/20250226120656.2400136-2-ryan.roberts@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_POWERPC_HUGETLB_H
|
|
#define _ASM_POWERPC_HUGETLB_H
|
|
|
|
#ifdef CONFIG_HUGETLB_PAGE
|
|
#include <asm/page.h>
|
|
|
|
#ifdef CONFIG_PPC_BOOK3S_64
|
|
#include <asm/book3s/64/hugetlb.h>
|
|
#elif defined(CONFIG_PPC_E500)
|
|
#include <asm/nohash/hugetlb-e500.h>
|
|
#elif defined(CONFIG_PPC_8xx)
|
|
#include <asm/nohash/32/hugetlb-8xx.h>
|
|
#endif /* CONFIG_PPC_BOOK3S_64 */
|
|
|
|
extern bool hugetlb_disabled;
|
|
|
|
static inline bool hugepages_supported(void)
|
|
{
|
|
if (hugetlb_disabled)
|
|
return false;
|
|
|
|
return HPAGE_SHIFT != 0;
|
|
}
|
|
#define hugepages_supported hugepages_supported
|
|
|
|
void __init hugetlbpage_init_defaultsize(void);
|
|
|
|
int slice_is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
|
|
unsigned long len);
|
|
|
|
static inline int is_hugepage_only_range(struct mm_struct *mm,
|
|
unsigned long addr,
|
|
unsigned long len)
|
|
{
|
|
if (IS_ENABLED(CONFIG_PPC_64S_HASH_MMU) && !radix_enabled())
|
|
return slice_is_hugepage_only_range(mm, addr, len);
|
|
return 0;
|
|
}
|
|
#define is_hugepage_only_range is_hugepage_only_range
|
|
|
|
#define __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT
|
|
void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep,
|
|
pte_t pte, unsigned long sz);
|
|
|
|
#define __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,
|
|
unsigned long sz)
|
|
{
|
|
return __pte(pte_update(mm, addr, ptep, ~0UL, 0, 1));
|
|
}
|
|
|
|
#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
|
|
static inline pte_t huge_ptep_clear_flush(struct vm_area_struct *vma,
|
|
unsigned long addr, pte_t *ptep)
|
|
{
|
|
pte_t pte;
|
|
unsigned long sz = huge_page_size(hstate_vma(vma));
|
|
|
|
pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep, sz);
|
|
flush_hugetlb_page(vma, addr);
|
|
return pte;
|
|
}
|
|
|
|
#define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
|
|
int huge_ptep_set_access_flags(struct vm_area_struct *vma,
|
|
unsigned long addr, pte_t *ptep,
|
|
pte_t pte, int dirty);
|
|
|
|
void gigantic_hugetlb_cma_reserve(void) __init;
|
|
#include <asm-generic/hugetlb.h>
|
|
|
|
#else /* ! CONFIG_HUGETLB_PAGE */
|
|
static inline void flush_hugetlb_page(struct vm_area_struct *vma,
|
|
unsigned long vmaddr)
|
|
{
|
|
}
|
|
|
|
static inline void __init gigantic_hugetlb_cma_reserve(void)
|
|
{
|
|
}
|
|
|
|
static inline void __init hugetlbpage_init_defaultsize(void)
|
|
{
|
|
}
|
|
#endif /* CONFIG_HUGETLB_PAGE */
|
|
|
|
#endif /* _ASM_POWERPC_HUGETLB_H */
|