[linux-block.git] / arch / riscv / include / asm / pgalloc.h

/* 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/sbi.h>
#include <asm/tlb.h>

#ifdef CONFIG_MMU
#define __HAVE_ARCH_PUD_FREE
#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));
}

static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
{
	if (pgtable_l4_enabled) {
		unsigned long pfn = virt_to_pfn(pud);

		set_p4d(p4d, __p4d((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE));
	}
}

static inline void p4d_populate_safe(struct mm_struct *mm, p4d_t *p4d,
				     pud_t *pud)
{
	if (pgtable_l4_enabled) {
		unsigned long pfn = virt_to_pfn(pud);

		set_p4d_safe(p4d,
			     __p4d((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE));
	}
}

static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, p4d_t *p4d)
{
	if (pgtable_l5_enabled) {
		unsigned long pfn = virt_to_pfn(p4d);

		set_pgd(pgd, __pgd((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE));
	}
}

static inline void pgd_populate_safe(struct mm_struct *mm, pgd_t *pgd,
				     p4d_t *p4d)
{
	if (pgtable_l5_enabled) {
		unsigned long pfn = virt_to_pfn(p4d);

		set_pgd_safe(pgd,
			     __pgd((pfn << _PAGE_PFN_SHIFT) | _PAGE_TABLE));
	}
}

#define pud_free pud_free
static inline void pud_free(struct mm_struct *mm, pud_t *pud)
{
	if (pgtable_l4_enabled)
		__pud_free(mm, pud);
}

static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
				  unsigned long addr)
{
	if (pgtable_l4_enabled)
		tlb_remove_ptdesc(tlb, virt_to_ptdesc(pud));
}

static inline void __p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d,
				  unsigned long addr)
{
	if (pgtable_l5_enabled)
		tlb_remove_ptdesc(tlb, virt_to_ptdesc(p4d));
}
#endif /* __PAGETABLE_PMD_FOLDED */

static inline void sync_kernel_mappings(pgd_t *pgd)
{
	memcpy(pgd + USER_PTRS_PER_PGD,
	       init_mm.pgd + USER_PTRS_PER_PGD,
	       (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
}

static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
	pgd_t *pgd;

	pgd = __pgd_alloc(mm, 0);
	if (likely(pgd != NULL)) {
		/* Copy kernel mappings */
		sync_kernel_mappings(pgd);
	}
	return pgd;
}

#ifndef __PAGETABLE_PMD_FOLDED

static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
				  unsigned long addr)
{
	tlb_remove_ptdesc(tlb, virt_to_ptdesc(pmd));
}

#endif /* __PAGETABLE_PMD_FOLDED */

static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
				  unsigned long addr)
{
	tlb_remove_ptdesc(tlb, page_ptdesc(pte));
}
#endif /* CONFIG_MMU */

#endif /* _ASM_RISCV_PGALLOC_H */
Commit	Line	Data
	1	/* SPDX-License-Identifier: GPL-2.0-only */
	2	/*
	3	* Copyright (C) 2009 Chen Liqin <liqin.chen@sunplusct.com>
	4	* Copyright (C) 2012 Regents of the University of California
	5	*/
	6
	7	#ifndef _ASM_RISCV_PGALLOC_H
	8	#define _ASM_RISCV_PGALLOC_H
	9
	10	#include <linux/mm.h>
	11	#include <asm/sbi.h>
	12	#include <asm/tlb.h>
	13
	14	#ifdef CONFIG_MMU
	15	#define __HAVE_ARCH_PUD_FREE
	16	#include <asm-generic/pgalloc.h>
	17
	18	static inline void pmd_populate_kernel(struct mm_struct *mm,
	19	pmd_t pmd, pte_t pte)
	20	{
	21	unsigned long pfn = virt_to_pfn(pte);
	22
	23	set_pmd(pmd, __pmd((pfn << _PAGE_PFN_SHIFT) \| _PAGE_TABLE));
	24	}
	25
	26	static inline void pmd_populate(struct mm_struct *mm,
	27	pmd_t *pmd, pgtable_t pte)
	28	{
	29	unsigned long pfn = virt_to_pfn(page_address(pte));
	30
	31	set_pmd(pmd, __pmd((pfn << _PAGE_PFN_SHIFT) \| _PAGE_TABLE));
	32	}
	33
	34	#ifndef __PAGETABLE_PMD_FOLDED
	35	static inline void pud_populate(struct mm_struct mm, pud_t pud, pmd_t *pmd)
	36	{
	37	unsigned long pfn = virt_to_pfn(pmd);
	38
	39	set_pud(pud, __pud((pfn << _PAGE_PFN_SHIFT) \| _PAGE_TABLE));
	40	}
	41
	42	static inline void p4d_populate(struct mm_struct mm, p4d_t p4d, pud_t *pud)
	43	{
	44	if (pgtable_l4_enabled) {
	45	unsigned long pfn = virt_to_pfn(pud);
	46
	47	set_p4d(p4d, __p4d((pfn << _PAGE_PFN_SHIFT) \| _PAGE_TABLE));
	48	}
	49	}
	50
	51	static inline void p4d_populate_safe(struct mm_struct mm, p4d_t p4d,
	52	pud_t *pud)
	53	{
	54	if (pgtable_l4_enabled) {
	55	unsigned long pfn = virt_to_pfn(pud);
	56
	57	set_p4d_safe(p4d,
	58	__p4d((pfn << _PAGE_PFN_SHIFT) \| _PAGE_TABLE));
	59	}
	60	}
	61
	62	static inline void pgd_populate(struct mm_struct mm, pgd_t pgd, p4d_t *p4d)
	63	{
	64	if (pgtable_l5_enabled) {
	65	unsigned long pfn = virt_to_pfn(p4d);
	66
	67	set_pgd(pgd, __pgd((pfn << _PAGE_PFN_SHIFT) \| _PAGE_TABLE));
	68	}
	69	}
	70
	71	static inline void pgd_populate_safe(struct mm_struct mm, pgd_t pgd,
	72	p4d_t *p4d)
	73	{
	74	if (pgtable_l5_enabled) {
	75	unsigned long pfn = virt_to_pfn(p4d);
	76
	77	set_pgd_safe(pgd,
	78	__pgd((pfn << _PAGE_PFN_SHIFT) \| _PAGE_TABLE));
	79	}
	80	}
	81
	82	#define pud_free pud_free
	83	static inline void pud_free(struct mm_struct mm, pud_t pud)
	84	{
	85	if (pgtable_l4_enabled)
	86	__pud_free(mm, pud);
	87	}
	88
	89	static inline void __pud_free_tlb(struct mmu_gather tlb, pud_t pud,
	90	unsigned long addr)
	91	{
	92	if (pgtable_l4_enabled)
	93	tlb_remove_ptdesc(tlb, virt_to_ptdesc(pud));
	94	}
	95
	96	static inline void __p4d_free_tlb(struct mmu_gather tlb, p4d_t p4d,
	97	unsigned long addr)
	98	{
	99	if (pgtable_l5_enabled)
	100	tlb_remove_ptdesc(tlb, virt_to_ptdesc(p4d));
	101	}
	102	#endif /* __PAGETABLE_PMD_FOLDED */
	103
	104	static inline void sync_kernel_mappings(pgd_t *pgd)
	105	{
	106	memcpy(pgd + USER_PTRS_PER_PGD,
	107	init_mm.pgd + USER_PTRS_PER_PGD,
	108	(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
	109	}
	110
	111	static inline pgd_t pgd_alloc(struct mm_struct mm)
	112	{
	113	pgd_t *pgd;
	114
	115	pgd = __pgd_alloc(mm, 0);
	116	if (likely(pgd != NULL)) {
	117	/* Copy kernel mappings */
	118	sync_kernel_mappings(pgd);
	119	}
	120	return pgd;
	121	}
	122
	123	#ifndef __PAGETABLE_PMD_FOLDED
	124
	125	static inline void __pmd_free_tlb(struct mmu_gather tlb, pmd_t pmd,
	126	unsigned long addr)
	127	{
	128	tlb_remove_ptdesc(tlb, virt_to_ptdesc(pmd));
	129	}
	130
	131	#endif /* __PAGETABLE_PMD_FOLDED */
	132
	133	static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
	134	unsigned long addr)
	135	{
	136	tlb_remove_ptdesc(tlb, page_ptdesc(pte));
	137	}
	138	#endif /* CONFIG_MMU */
	139
	140	#endif /* _ASM_RISCV_PGALLOC_H */