mirror of
https://github.com/torvalds/linux.git
synced 2025-11-03 18:20:25 +02:00
bff28e6bd0
As part of the conversions to replace pgtable constructor/destructors with ptdesc equivalents, convert various page table functions to use ptdescs. Some of the functions use the *get*page*() helper functions. Convert these to use pagetable_alloc() and ptdesc_address() instead to help standardize page tables further. Link: https://lkml.kernel.org/r/20230807230513.102486-23-vishal.moola@gmail.com Signed-off-by: Vishal Moola (Oracle) <vishal.moola@gmail.com> Acked-by: Mike Rapoport (IBM) <rppt@kernel.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Claudio Imbrenda <imbrenda@linux.ibm.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David Hildenbrand <david@redhat.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Dinh Nguyen <dinguyen@kernel.org> Cc: Geert Uytterhoeven <geert+renesas@glider.be> Cc: Guo Ren <guoren@kernel.org> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Hugh Dickins <hughd@google.com> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Jonas Bonn <jonas@southpole.se> Cc: Matthew Wilcox <willy@infradead.org> Cc: Palmer Dabbelt <palmer@rivosinc.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Richard Weinberger <richard@nod.at> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
94 lines
2.1 KiB
C
94 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef M68K_MCF_PGALLOC_H
|
|
#define M68K_MCF_PGALLOC_H
|
|
|
|
#include <asm/tlb.h>
|
|
#include <asm/tlbflush.h>
|
|
|
|
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
|
|
{
|
|
pagetable_free(virt_to_ptdesc(pte));
|
|
}
|
|
|
|
extern const char bad_pmd_string[];
|
|
|
|
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
|
|
{
|
|
struct ptdesc *ptdesc = pagetable_alloc((GFP_DMA | __GFP_ZERO) &
|
|
~__GFP_HIGHMEM, 0);
|
|
|
|
if (!ptdesc)
|
|
return NULL;
|
|
|
|
return ptdesc_address(ptdesc);
|
|
}
|
|
|
|
extern inline pmd_t *pmd_alloc_kernel(pgd_t *pgd, unsigned long address)
|
|
{
|
|
return (pmd_t *) pgd;
|
|
}
|
|
|
|
#define pmd_populate(mm, pmd, pte) (pmd_val(*pmd) = (unsigned long)(pte))
|
|
|
|
#define pmd_populate_kernel pmd_populate
|
|
|
|
static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pgtable,
|
|
unsigned long address)
|
|
{
|
|
struct ptdesc *ptdesc = virt_to_ptdesc(pgtable);
|
|
|
|
pagetable_pte_dtor(ptdesc);
|
|
pagetable_free(ptdesc);
|
|
}
|
|
|
|
static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
|
|
{
|
|
struct ptdesc *ptdesc = pagetable_alloc(GFP_DMA | __GFP_ZERO, 0);
|
|
pte_t *pte;
|
|
|
|
if (!ptdesc)
|
|
return NULL;
|
|
if (!pagetable_pte_ctor(ptdesc)) {
|
|
pagetable_free(ptdesc);
|
|
return NULL;
|
|
}
|
|
|
|
pte = ptdesc_address(ptdesc);
|
|
return pte;
|
|
}
|
|
|
|
static inline void pte_free(struct mm_struct *mm, pgtable_t pgtable)
|
|
{
|
|
struct ptdesc *ptdesc = virt_to_ptdesc(pgtable);
|
|
|
|
pagetable_pte_dtor(ptdesc);
|
|
pagetable_free(ptdesc);
|
|
}
|
|
|
|
/*
|
|
* In our implementation, each pgd entry contains 1 pmd that is never allocated
|
|
* or freed. pgd_present is always 1, so this should never be called. -NL
|
|
*/
|
|
#define pmd_free(mm, pmd) BUG()
|
|
|
|
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
|
|
{
|
|
pagetable_free(virt_to_ptdesc(pgd));
|
|
}
|
|
|
|
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
|
|
{
|
|
pgd_t *new_pgd;
|
|
struct ptdesc *ptdesc = pagetable_alloc((GFP_DMA | __GFP_NOWARN) &
|
|
~__GFP_HIGHMEM, 0);
|
|
|
|
if (!ptdesc)
|
|
return NULL;
|
|
new_pgd = ptdesc_address(ptdesc);
|
|
|
|
memcpy(new_pgd, swapper_pg_dir, PTRS_PER_PGD * sizeof(pgd_t));
|
|
memset(new_pgd, 0, PAGE_OFFSET >> PGDIR_SHIFT);
|
|
return new_pgd;
|
|
}
|
|
|
|
#endif /* M68K_MCF_PGALLOC_H */
|