mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 20:53:53 +08:00
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>
184 lines
5.2 KiB
C
184 lines
5.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_X86_PGALLOC_H
|
|
#define _ASM_X86_PGALLOC_H
|
|
|
|
#include <linux/threads.h>
|
|
#include <linux/mm.h> /* for struct page */
|
|
#include <linux/pagemap.h>
|
|
|
|
#define __HAVE_ARCH_PTE_ALLOC_ONE
|
|
#define __HAVE_ARCH_PGD_FREE
|
|
#include <asm-generic/pgalloc.h>
|
|
|
|
static inline int __paravirt_pgd_alloc(struct mm_struct *mm) { return 0; }
|
|
|
|
#ifdef CONFIG_PARAVIRT_XXL
|
|
#include <asm/paravirt.h>
|
|
#else
|
|
#define paravirt_pgd_alloc(mm) __paravirt_pgd_alloc(mm)
|
|
static inline void paravirt_pgd_free(struct mm_struct *mm, pgd_t *pgd) {}
|
|
static inline void paravirt_alloc_pte(struct mm_struct *mm, unsigned long pfn) {}
|
|
static inline void paravirt_alloc_pmd(struct mm_struct *mm, unsigned long pfn) {}
|
|
static inline void paravirt_alloc_pmd_clone(unsigned long pfn, unsigned long clonepfn,
|
|
unsigned long start, unsigned long count) {}
|
|
static inline void paravirt_alloc_pud(struct mm_struct *mm, unsigned long pfn) {}
|
|
static inline void paravirt_alloc_p4d(struct mm_struct *mm, unsigned long pfn) {}
|
|
static inline void paravirt_release_pte(unsigned long pfn) {}
|
|
static inline void paravirt_release_pmd(unsigned long pfn) {}
|
|
static inline void paravirt_release_pud(unsigned long pfn) {}
|
|
static inline void paravirt_release_p4d(unsigned long pfn) {}
|
|
#endif
|
|
|
|
/*
|
|
* Flags to use when allocating a user page table page.
|
|
*/
|
|
extern gfp_t __userpte_alloc_gfp;
|
|
|
|
#ifdef CONFIG_PAGE_TABLE_ISOLATION
|
|
/*
|
|
* Instead of one PGD, we acquire two PGDs. Being order-1, it is
|
|
* both 8k in size and 8k-aligned. That lets us just flip bit 12
|
|
* in a pointer to swap between the two 4k halves.
|
|
*/
|
|
#define PGD_ALLOCATION_ORDER 1
|
|
#else
|
|
#define PGD_ALLOCATION_ORDER 0
|
|
#endif
|
|
|
|
/*
|
|
* Allocate and free page tables.
|
|
*/
|
|
extern pgd_t *pgd_alloc(struct mm_struct *);
|
|
extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
|
|
|
|
extern pgtable_t pte_alloc_one(struct mm_struct *);
|
|
|
|
extern void ___pte_free_tlb(struct mmu_gather *tlb, struct page *pte);
|
|
|
|
static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte,
|
|
unsigned long address)
|
|
{
|
|
___pte_free_tlb(tlb, pte);
|
|
}
|
|
|
|
static inline void pmd_populate_kernel(struct mm_struct *mm,
|
|
pmd_t *pmd, pte_t *pte)
|
|
{
|
|
paravirt_alloc_pte(mm, __pa(pte) >> PAGE_SHIFT);
|
|
set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE));
|
|
}
|
|
|
|
static inline void pmd_populate_kernel_safe(struct mm_struct *mm,
|
|
pmd_t *pmd, pte_t *pte)
|
|
{
|
|
paravirt_alloc_pte(mm, __pa(pte) >> PAGE_SHIFT);
|
|
set_pmd_safe(pmd, __pmd(__pa(pte) | _PAGE_TABLE));
|
|
}
|
|
|
|
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
|
|
struct page *pte)
|
|
{
|
|
unsigned long pfn = page_to_pfn(pte);
|
|
|
|
paravirt_alloc_pte(mm, pfn);
|
|
set_pmd(pmd, __pmd(((pteval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE));
|
|
}
|
|
|
|
#define pmd_pgtable(pmd) pmd_page(pmd)
|
|
|
|
#if CONFIG_PGTABLE_LEVELS > 2
|
|
extern void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd);
|
|
|
|
static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
|
|
unsigned long address)
|
|
{
|
|
___pmd_free_tlb(tlb, pmd);
|
|
}
|
|
|
|
#ifdef CONFIG_X86_PAE
|
|
extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd);
|
|
#else /* !CONFIG_X86_PAE */
|
|
static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
|
|
{
|
|
paravirt_alloc_pmd(mm, __pa(pmd) >> PAGE_SHIFT);
|
|
set_pud(pud, __pud(_PAGE_TABLE | __pa(pmd)));
|
|
}
|
|
|
|
static inline void pud_populate_safe(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
|
|
{
|
|
paravirt_alloc_pmd(mm, __pa(pmd) >> PAGE_SHIFT);
|
|
set_pud_safe(pud, __pud(_PAGE_TABLE | __pa(pmd)));
|
|
}
|
|
#endif /* CONFIG_X86_PAE */
|
|
|
|
#if CONFIG_PGTABLE_LEVELS > 3
|
|
static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
|
|
{
|
|
paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT);
|
|
set_p4d(p4d, __p4d(_PAGE_TABLE | __pa(pud)));
|
|
}
|
|
|
|
static inline void p4d_populate_safe(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
|
|
{
|
|
paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT);
|
|
set_p4d_safe(p4d, __p4d(_PAGE_TABLE | __pa(pud)));
|
|
}
|
|
|
|
extern void ___pud_free_tlb(struct mmu_gather *tlb, pud_t *pud);
|
|
|
|
static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
|
|
unsigned long address)
|
|
{
|
|
___pud_free_tlb(tlb, pud);
|
|
}
|
|
|
|
#if CONFIG_PGTABLE_LEVELS > 4
|
|
static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, p4d_t *p4d)
|
|
{
|
|
if (!pgtable_l5_enabled())
|
|
return;
|
|
paravirt_alloc_p4d(mm, __pa(p4d) >> PAGE_SHIFT);
|
|
set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(p4d)));
|
|
}
|
|
|
|
static inline void pgd_populate_safe(struct mm_struct *mm, pgd_t *pgd, p4d_t *p4d)
|
|
{
|
|
if (!pgtable_l5_enabled())
|
|
return;
|
|
paravirt_alloc_p4d(mm, __pa(p4d) >> PAGE_SHIFT);
|
|
set_pgd_safe(pgd, __pgd(_PAGE_TABLE | __pa(p4d)));
|
|
}
|
|
|
|
static inline p4d_t *p4d_alloc_one(struct mm_struct *mm, unsigned long addr)
|
|
{
|
|
gfp_t gfp = GFP_KERNEL_ACCOUNT;
|
|
|
|
if (mm == &init_mm)
|
|
gfp &= ~__GFP_ACCOUNT;
|
|
return (p4d_t *)get_zeroed_page(gfp);
|
|
}
|
|
|
|
static inline void p4d_free(struct mm_struct *mm, p4d_t *p4d)
|
|
{
|
|
if (!pgtable_l5_enabled())
|
|
return;
|
|
|
|
BUG_ON((unsigned long)p4d & (PAGE_SIZE-1));
|
|
free_page((unsigned long)p4d);
|
|
}
|
|
|
|
extern void ___p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d);
|
|
|
|
static inline void __p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d,
|
|
unsigned long address)
|
|
{
|
|
if (pgtable_l5_enabled())
|
|
___p4d_free_tlb(tlb, p4d);
|
|
}
|
|
|
|
#endif /* CONFIG_PGTABLE_LEVELS > 4 */
|
|
#endif /* CONFIG_PGTABLE_LEVELS > 3 */
|
|
#endif /* CONFIG_PGTABLE_LEVELS > 2 */
|
|
|
|
#endif /* _ASM_X86_PGALLOC_H */
|