f9cb654cb5
Most architectures define pgd_free() as a wrapper for free_page(). Provide a generic version in asm-generic/pgalloc.h and enable its use for most architectures. Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Pekka Enberg <penberg@kernel.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k] Cc: Abdul Haleem <abdhalee@linux.vnet.ibm.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Joerg Roedel <joro@8bytes.org> Cc: Joerg Roedel <jroedel@suse.de> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com> Cc: Stafford Horne <shorne@gmail.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Matthew Wilcox <willy@infradead.org> Link: http://lkml.kernel.org/r/20200627143453.31835-7-rppt@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (C) 2009 Chen Liqin <liqin.chen@sunplusct.com>
|
|
* Copyright (C) 2012 Regents of the University of California
|
|
*/
|
|
|
|
#ifndef _ASM_RISCV_PGALLOC_H
|
|
#define _ASM_RISCV_PGALLOC_H
|
|
|
|
#include <linux/mm.h>
|
|
#include <asm/tlb.h>
|
|
|
|
#ifdef CONFIG_MMU
|
|
#include <asm-generic/pgalloc.h>
|
|
|
|
static inline void pmd_populate_kernel(struct mm_struct *mm,
|
|
pmd_t *pmd, pte_t *pte)
|
|
{
|
|
unsigned long pfn = virt_to_pfn(pte);
|
|
|
|
set_pmd(pmd, __pmd((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE));
|
|
}
|
|
|
|
static inline void pmd_populate(struct mm_struct *mm,
|
|
pmd_t *pmd, pgtable_t pte)
|
|
{
|
|
unsigned long pfn = virt_to_pfn(page_address(pte));
|
|
|
|
set_pmd(pmd, __pmd((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE));
|
|
}
|
|
|
|
#ifndef __PAGETABLE_PMD_FOLDED
|
|
static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
|
|
{
|
|
unsigned long pfn = virt_to_pfn(pmd);
|
|
|
|
set_pud(pud, __pud((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE));
|
|
}
|
|
#endif /* __PAGETABLE_PMD_FOLDED */
|
|
|
|
#define pmd_pgtable(pmd) pmd_page(pmd)
|
|
|
|
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
|
|
{
|
|
pgd_t *pgd;
|
|
|
|
pgd = (pgd_t *)__get_free_page(GFP_KERNEL);
|
|
if (likely(pgd != NULL)) {
|
|
memset(pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
|
|
/* Copy kernel mappings */
|
|
memcpy(pgd + USER_PTRS_PER_PGD,
|
|
init_mm.pgd + USER_PTRS_PER_PGD,
|
|
(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
|
|
}
|
|
return pgd;
|
|
}
|
|
|
|
#ifndef __PAGETABLE_PMD_FOLDED
|
|
|
|
#define __pmd_free_tlb(tlb, pmd, addr) pmd_free((tlb)->mm, pmd)
|
|
|
|
#endif /* __PAGETABLE_PMD_FOLDED */
|
|
|
|
#define __pte_free_tlb(tlb, pte, buf) \
|
|
do { \
|
|
pgtable_pte_page_dtor(pte); \
|
|
tlb_remove_page((tlb), pte); \
|
|
} while (0)
|
|
#endif /* CONFIG_MMU */
|
|
|
|
#endif /* _ASM_RISCV_PGALLOC_H */
|