Contributors: 21
Author Tokens Token Proportion Commits Commit Proportion
Aneesh Kumar K.V 151 27.86% 15 23.44%
Christophe Leroy 124 22.88% 11 17.19%
Anton Blanchard 47 8.67% 4 6.25%
David Gibson 41 7.56% 5 7.81%
Benjamin Herrenschmidt 36 6.64% 7 10.94%
Mike Rapoport 22 4.06% 2 3.12%
Paul Mackerras 19 3.51% 3 4.69%
Michael Ellerman 15 2.77% 1 1.56%
Christoph Lameter 13 2.40% 1 1.56%
Anshuman Khandual 12 2.21% 2 3.12%
Palmer Dabbelt 12 2.21% 1 1.56%
Alexey Kardashevskiy 9 1.66% 1 1.56%
Daniel Silsby 7 1.29% 1 1.56%
Nicu Ioan Petru 6 1.11% 1 1.56%
Jordan Niethe 6 1.11% 1 1.56%
Scott Wood 5 0.92% 2 3.12%
Stefan Roese 5 0.92% 1 1.56%
Nicholas Piggin 4 0.74% 1 1.56%
Geoff Thorpe 4 0.74% 1 1.56%
Mel Gorman 3 0.55% 2 3.12%
Greg Kroah-Hartman 1 0.18% 1 1.56%
Total 542 64 


/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_PGTABLE_H
#define _ASM_POWERPC_PGTABLE_H

#ifndef __ASSEMBLY__
#include <linux/mmdebug.h>
#include <linux/mmzone.h>
#include <asm/processor.h>		/* For TASK_SIZE */
#include <asm/mmu.h>
#include <asm/page.h>
#include <asm/tlbflush.h>

struct mm_struct;

#endif /* !__ASSEMBLY__ */

#ifdef CONFIG_PPC_BOOK3S
#include <asm/book3s/pgtable.h>
#else
#include <asm/nohash/pgtable.h>
#endif /* !CONFIG_PPC_BOOK3S */

/*
 * Protection used for kernel text. We want the debuggers to be able to
 * set breakpoints anywhere, so don't write protect the kernel text
 * on platforms where such control is possible.
 */
#if defined(CONFIG_KGDB) || defined(CONFIG_XMON) || defined(CONFIG_BDI_SWITCH) || \
	defined(CONFIG_KPROBES) || defined(CONFIG_DYNAMIC_FTRACE)
#define PAGE_KERNEL_TEXT	PAGE_KERNEL_X
#else
#define PAGE_KERNEL_TEXT	PAGE_KERNEL_ROX
#endif

/* Make modules code happy. We don't set RO yet */
#define PAGE_KERNEL_EXEC	PAGE_KERNEL_X

/* Advertise special mapping type for AGP */
#define PAGE_AGP		(PAGE_KERNEL_NC)
#define HAVE_PAGE_AGP

#ifndef __ASSEMBLY__

#ifndef MAX_PTRS_PER_PGD
#define MAX_PTRS_PER_PGD PTRS_PER_PGD
#endif

/* Keep these as a macros to avoid include dependency mess */
#define pte_page(x)		pfn_to_page(pte_pfn(x))
#define mk_pte(page, pgprot)	pfn_pte(page_to_pfn(page), (pgprot))
/*
 * Select all bits except the pfn
 */
static inline pgprot_t pte_pgprot(pte_t pte)
{
	unsigned long pte_flags;

	pte_flags = pte_val(pte) & ~PTE_RPN_MASK;
	return __pgprot(pte_flags);
}

#ifndef pmd_page_vaddr
static inline unsigned long pmd_page_vaddr(pmd_t pmd)
{
	return ((unsigned long)__va(pmd_val(pmd) & ~PMD_MASKED_BITS));
}
#define pmd_page_vaddr pmd_page_vaddr
#endif
/*
 * ZERO_PAGE is a global shared page that is always zero: used
 * for zero-mapped memory areas etc..
 */
extern unsigned long empty_zero_page[];
#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))

extern pgd_t swapper_pg_dir[];

extern void paging_init(void);
void poking_init(void);

extern unsigned long ioremap_bot;
extern const pgprot_t protection_map[16];

#ifndef CONFIG_TRANSPARENT_HUGEPAGE
#define pmd_large(pmd)		0
#endif

/* can we use this in kvm */
unsigned long vmalloc_to_phys(void *vmalloc_addr);

void pgtable_cache_add(unsigned int shift);

pte_t *early_pte_alloc_kernel(pmd_t *pmdp, unsigned long va);

#if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_PPC32)
void mark_initmem_nx(void);
#else
static inline void mark_initmem_nx(void) { }
#endif

/*
 * When used, PTE_FRAG_NR is defined in subarch pgtable.h
 * so we are sure it is included when arriving here.
 */
#ifdef PTE_FRAG_NR
static inline void *pte_frag_get(mm_context_t *ctx)
{
	return ctx->pte_frag;
}

static inline void pte_frag_set(mm_context_t *ctx, void *p)
{
	ctx->pte_frag = p;
}
#else
#define PTE_FRAG_NR		1
#define PTE_FRAG_SIZE_SHIFT	PAGE_SHIFT
#define PTE_FRAG_SIZE		(1UL << PTE_FRAG_SIZE_SHIFT)

static inline void *pte_frag_get(mm_context_t *ctx)
{
	return NULL;
}

static inline void pte_frag_set(mm_context_t *ctx, void *p)
{
}
#endif

#ifndef pmd_is_leaf
#define pmd_is_leaf pmd_is_leaf
static inline bool pmd_is_leaf(pmd_t pmd)
{
	return false;
}
#endif

#ifndef pud_is_leaf
#define pud_is_leaf pud_is_leaf
static inline bool pud_is_leaf(pud_t pud)
{
	return false;
}
#endif

#ifndef p4d_is_leaf
#define p4d_is_leaf p4d_is_leaf
static inline bool p4d_is_leaf(p4d_t p4d)
{
	return false;
}
#endif

#define pmd_pgtable pmd_pgtable
static inline pgtable_t pmd_pgtable(pmd_t pmd)
{
	return (pgtable_t)pmd_page_vaddr(pmd);
}

#ifdef CONFIG_PPC64
#define is_ioremap_addr is_ioremap_addr
static inline bool is_ioremap_addr(const void *x)
{
	unsigned long addr = (unsigned long)x;

	return addr >= IOREMAP_BASE && addr < IOREMAP_END;
}
#endif /* CONFIG_PPC64 */

#endif /* __ASSEMBLY__ */

#endif /* _ASM_POWERPC_PGTABLE_H */