forked from Minki/linux
2c8a81dc0c
Two page table check related issues have been fixed here. 1. Open CONFIG_PAGE_TABLE_CHECK in riscv32, we got a compile error[1]: error: implicit declaration of function 'pud_leaf' Add pud_leaf() definition to incluce/asm-generic/pgtable-nopmd.h to fix this issue. 2. Keep consistent with other pud_xxx() helpers, move pud_user() to pgtable-64.h and add pud_user() to pgtable-nopmd.h. [1]https://lore.kernel.org/linux-mm/202205161811.2nLxmN2O-lkp@intel.com/T/ Link: https://lkml.kernel.org/r/20220517074548.2227779-2-tongtiangen@huawei.com Fixes: 856eed79f8d3 ("riscv/mm: enable ARCH_SUPPORTS_PAGE_TABLE_CHECK") Signed-off-by: Tong Tiangen <tongtiangen@huawei.com> Reported-by: kernel test robot <lkp@intel.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Pasha Tatashin <pasha.tatashin@soleen.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Guohanjun <guohanjun@huawei.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Will Deacon <will@kernel.org> Cc: Xie XiuQi <xiexiuqi@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
74 lines
2.0 KiB
C
74 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _PGTABLE_NOPMD_H
|
|
#define _PGTABLE_NOPMD_H
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <asm-generic/pgtable-nopud.h>
|
|
|
|
struct mm_struct;
|
|
|
|
#define __PAGETABLE_PMD_FOLDED 1
|
|
|
|
/*
|
|
* Having the pmd type consist of a pud gets the size right, and allows
|
|
* us to conceptually access the pud entry that this pmd is folded into
|
|
* without casting.
|
|
*/
|
|
typedef struct { pud_t pud; } pmd_t;
|
|
|
|
#define PMD_SHIFT PUD_SHIFT
|
|
#define PTRS_PER_PMD 1
|
|
#define PMD_SIZE (1UL << PMD_SHIFT)
|
|
#define PMD_MASK (~(PMD_SIZE-1))
|
|
|
|
/*
|
|
* The "pud_xxx()" functions here are trivial for a folded two-level
|
|
* setup: the pmd is never bad, and a pmd always exists (as it's folded
|
|
* into the pud entry)
|
|
*/
|
|
static inline int pud_none(pud_t pud) { return 0; }
|
|
static inline int pud_bad(pud_t pud) { return 0; }
|
|
static inline int pud_present(pud_t pud) { return 1; }
|
|
static inline int pud_user(pud_t pud) { return 0; }
|
|
static inline int pud_leaf(pud_t pud) { return 0; }
|
|
static inline void pud_clear(pud_t *pud) { }
|
|
#define pmd_ERROR(pmd) (pud_ERROR((pmd).pud))
|
|
|
|
#define pud_populate(mm, pmd, pte) do { } while (0)
|
|
|
|
/*
|
|
* (pmds are folded into puds so this doesn't get actually called,
|
|
* but the define is needed for a generic inline function.)
|
|
*/
|
|
#define set_pud(pudptr, pudval) set_pmd((pmd_t *)(pudptr), (pmd_t) { pudval })
|
|
|
|
static inline pmd_t * pmd_offset(pud_t * pud, unsigned long address)
|
|
{
|
|
return (pmd_t *)pud;
|
|
}
|
|
#define pmd_offset pmd_offset
|
|
|
|
#define pmd_val(x) (pud_val((x).pud))
|
|
#define __pmd(x) ((pmd_t) { __pud(x) } )
|
|
|
|
#define pud_page(pud) (pmd_page((pmd_t){ pud }))
|
|
#define pud_pgtable(pud) ((pmd_t *)(pmd_page_vaddr((pmd_t){ pud })))
|
|
|
|
/*
|
|
* allocating and freeing a pmd is trivial: the 1-entry pmd is
|
|
* inside the pud, so has no extra memory associated with it.
|
|
*/
|
|
#define pmd_alloc_one(mm, address) NULL
|
|
static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
|
|
{
|
|
}
|
|
#define pmd_free_tlb(tlb, x, a) do { } while (0)
|
|
|
|
#undef pmd_addr_end
|
|
#define pmd_addr_end(addr, end) (end)
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif /* _PGTABLE_NOPMD_H */
|