Commit d96885e2 authored by Mike Rapoport's avatar Mike Rapoport Committed by Linus Torvalds

parisc: use pgtable-nopXd instead of 4level-fixup

parisc has two or three levels of page tables and can use appropriate
pgtable-nopXd and folding of the upper layers.

Replace usage of include/asm-generic/4level-fixup.h and explicit
definitions of __PAGETABLE_PxD_FOLDED in parisc with
include/asm-generic/pgtable-nopmd.h for two-level configurations and
with include/asm-generic/pgtable-nopud.h for three-lelve configurations
and adjust page table manipulation macros and functions accordingly.

Link: http://lkml.kernel.org/r/1572938135-31886-9-git-send-email-rppt@kernel.orgSigned-off-by: default avatarMike Rapoport <rppt@linux.ibm.com>
Acked-by: default avatarHelge Deller <deller@gmx.de>
Cc: Anatoly Pugachev <matorola@gmail.com>
Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Mark Salter <msalter@redhat.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Peter Rosin <peda@axentia.se>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rolf Eike Beer <eike-kernel@sf-tec.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Sam Creasey <sammy@sammy.net>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 7c2763c4
...@@ -42,48 +42,54 @@ typedef struct { unsigned long pte; } pte_t; /* either 32 or 64bit */ ...@@ -42,48 +42,54 @@ typedef struct { unsigned long pte; } pte_t; /* either 32 or 64bit */
/* NOTE: even on 64 bits, these entries are __u32 because we allocate /* NOTE: even on 64 bits, these entries are __u32 because we allocate
* the pmd and pgd in ZONE_DMA (i.e. under 4GB) */ * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */
typedef struct { __u32 pmd; } pmd_t;
typedef struct { __u32 pgd; } pgd_t; typedef struct { __u32 pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t; typedef struct { unsigned long pgprot; } pgprot_t;
#define pte_val(x) ((x).pte) #if CONFIG_PGTABLE_LEVELS == 3
/* These do not work lvalues, so make sure we don't use them as such. */ typedef struct { __u32 pmd; } pmd_t;
#define __pmd(x) ((pmd_t) { (x) } )
/* pXd_val() do not work as lvalues, so make sure we don't use them as such. */
#define pmd_val(x) ((x).pmd + 0) #define pmd_val(x) ((x).pmd + 0)
#endif
#define pte_val(x) ((x).pte)
#define pgd_val(x) ((x).pgd + 0) #define pgd_val(x) ((x).pgd + 0)
#define pgprot_val(x) ((x).pgprot) #define pgprot_val(x) ((x).pgprot)
#define __pte(x) ((pte_t) { (x) } ) #define __pte(x) ((pte_t) { (x) } )
#define __pmd(x) ((pmd_t) { (x) } )
#define __pgd(x) ((pgd_t) { (x) } ) #define __pgd(x) ((pgd_t) { (x) } )
#define __pgprot(x) ((pgprot_t) { (x) } ) #define __pgprot(x) ((pgprot_t) { (x) } )
#define __pmd_val_set(x,n) (x).pmd = (n)
#define __pgd_val_set(x,n) (x).pgd = (n)
#else #else
/* /*
* .. while these make it easier on the compiler * .. while these make it easier on the compiler
*/ */
typedef unsigned long pte_t; typedef unsigned long pte_t;
#if CONFIG_PGTABLE_LEVELS == 3
typedef __u32 pmd_t; typedef __u32 pmd_t;
#define pmd_val(x) (x)
#define __pmd(x) (x)
#endif
typedef __u32 pgd_t; typedef __u32 pgd_t;
typedef unsigned long pgprot_t; typedef unsigned long pgprot_t;
#define pte_val(x) (x) #define pte_val(x) (x)
#define pmd_val(x) (x)
#define pgd_val(x) (x) #define pgd_val(x) (x)
#define pgprot_val(x) (x) #define pgprot_val(x) (x)
#define __pte(x) (x) #define __pte(x) (x)
#define __pmd(x) (x)
#define __pgd(x) (x) #define __pgd(x) (x)
#define __pgprot(x) (x) #define __pgprot(x) (x)
#define __pmd_val_set(x,n) (x) = (n)
#define __pgd_val_set(x,n) (x) = (n)
#endif /* STRICT_MM_TYPECHECKS */ #endif /* STRICT_MM_TYPECHECKS */
#define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
#if CONFIG_PGTABLE_LEVELS == 3
#define set_pud(pudptr, pudval) (*(pudptr) = (pudval))
#endif
typedef struct page *pgtable_t; typedef struct page *pgtable_t;
typedef struct __physmem_range { typedef struct __physmem_range {
......
...@@ -34,13 +34,13 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm) ...@@ -34,13 +34,13 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm)
/* Populate first pmd with allocated memory. We mark it /* Populate first pmd with allocated memory. We mark it
* with PxD_FLAG_ATTACHED as a signal to the system that this * with PxD_FLAG_ATTACHED as a signal to the system that this
* pmd entry may not be cleared. */ * pmd entry may not be cleared. */
__pgd_val_set(*actual_pgd, (PxD_FLAG_PRESENT | set_pgd(actual_pgd, __pgd((PxD_FLAG_PRESENT |
PxD_FLAG_VALID | PxD_FLAG_VALID |
PxD_FLAG_ATTACHED) PxD_FLAG_ATTACHED)
+ (__u32)(__pa((unsigned long)pgd) >> PxD_VALUE_SHIFT)); + (__u32)(__pa((unsigned long)pgd) >> PxD_VALUE_SHIFT)));
/* The first pmd entry also is marked with PxD_FLAG_ATTACHED as /* The first pmd entry also is marked with PxD_FLAG_ATTACHED as
* a signal that this pmd may not be freed */ * a signal that this pmd may not be freed */
__pgd_val_set(*pgd, PxD_FLAG_ATTACHED); set_pgd(pgd, __pgd(PxD_FLAG_ATTACHED));
#endif #endif
} }
spin_lock_init(pgd_spinlock(actual_pgd)); spin_lock_init(pgd_spinlock(actual_pgd));
...@@ -59,10 +59,10 @@ static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) ...@@ -59,10 +59,10 @@ static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
/* Three Level Page Table Support for pmd's */ /* Three Level Page Table Support for pmd's */
static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd) static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
{ {
__pgd_val_set(*pgd, (PxD_FLAG_PRESENT | PxD_FLAG_VALID) + set_pud(pud, __pud((PxD_FLAG_PRESENT | PxD_FLAG_VALID) +
(__u32)(__pa((unsigned long)pmd) >> PxD_VALUE_SHIFT)); (__u32)(__pa((unsigned long)pmd) >> PxD_VALUE_SHIFT)));
} }
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
...@@ -88,19 +88,6 @@ static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) ...@@ -88,19 +88,6 @@ static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
free_pages((unsigned long)pmd, PMD_ORDER); free_pages((unsigned long)pmd, PMD_ORDER);
} }
#else
/* Two Level Page Table Support for pmd's */
/*
* allocating and freeing a pmd is trivial: the 1-entry pmd is
* inside the pgd, so has no extra memory associated with it.
*/
#define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); })
#define pmd_free(mm, x) do { } while (0)
#define pgd_populate(mm, pmd, pte) BUG()
#endif #endif
static inline void static inline void
...@@ -110,14 +97,14 @@ pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte) ...@@ -110,14 +97,14 @@ pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
/* preserve the gateway marker if this is the beginning of /* preserve the gateway marker if this is the beginning of
* the permanent pmd */ * the permanent pmd */
if(pmd_flag(*pmd) & PxD_FLAG_ATTACHED) if(pmd_flag(*pmd) & PxD_FLAG_ATTACHED)
__pmd_val_set(*pmd, (PxD_FLAG_PRESENT | set_pmd(pmd, __pmd((PxD_FLAG_PRESENT |
PxD_FLAG_VALID | PxD_FLAG_VALID |
PxD_FLAG_ATTACHED) PxD_FLAG_ATTACHED)
+ (__u32)(__pa((unsigned long)pte) >> PxD_VALUE_SHIFT)); + (__u32)(__pa((unsigned long)pte) >> PxD_VALUE_SHIFT)));
else else
#endif #endif
__pmd_val_set(*pmd, (PxD_FLAG_PRESENT | PxD_FLAG_VALID) set_pmd(pmd, __pmd((PxD_FLAG_PRESENT | PxD_FLAG_VALID)
+ (__u32)(__pa((unsigned long)pte) >> PxD_VALUE_SHIFT)); + (__u32)(__pa((unsigned long)pte) >> PxD_VALUE_SHIFT)));
} }
#define pmd_populate(mm, pmd, pte_page) \ #define pmd_populate(mm, pmd, pte_page) \
......
...@@ -3,7 +3,12 @@ ...@@ -3,7 +3,12 @@
#define _PARISC_PGTABLE_H #define _PARISC_PGTABLE_H
#include <asm/page.h> #include <asm/page.h>
#include <asm-generic/4level-fixup.h>
#if CONFIG_PGTABLE_LEVELS == 3
#include <asm-generic/pgtable-nopud.h>
#elif CONFIG_PGTABLE_LEVELS == 2
#include <asm-generic/pgtable-nopmd.h>
#endif
#include <asm/fixmap.h> #include <asm/fixmap.h>
...@@ -101,8 +106,10 @@ static inline void purge_tlb_entries(struct mm_struct *mm, unsigned long addr) ...@@ -101,8 +106,10 @@ static inline void purge_tlb_entries(struct mm_struct *mm, unsigned long addr)
#define pte_ERROR(e) \ #define pte_ERROR(e) \
printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e)) printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
#if CONFIG_PGTABLE_LEVELS == 3
#define pmd_ERROR(e) \ #define pmd_ERROR(e) \
printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, (unsigned long)pmd_val(e)) printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, (unsigned long)pmd_val(e))
#endif
#define pgd_ERROR(e) \ #define pgd_ERROR(e) \
printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, (unsigned long)pgd_val(e)) printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, (unsigned long)pgd_val(e))
...@@ -132,19 +139,18 @@ static inline void purge_tlb_entries(struct mm_struct *mm, unsigned long addr) ...@@ -132,19 +139,18 @@ static inline void purge_tlb_entries(struct mm_struct *mm, unsigned long addr)
#define PTRS_PER_PTE (1UL << BITS_PER_PTE) #define PTRS_PER_PTE (1UL << BITS_PER_PTE)
/* Definitions for 2nd level */ /* Definitions for 2nd level */
#if CONFIG_PGTABLE_LEVELS == 3
#define PMD_SHIFT (PLD_SHIFT + BITS_PER_PTE) #define PMD_SHIFT (PLD_SHIFT + BITS_PER_PTE)
#define PMD_SIZE (1UL << PMD_SHIFT) #define PMD_SIZE (1UL << PMD_SHIFT)
#define PMD_MASK (~(PMD_SIZE-1)) #define PMD_MASK (~(PMD_SIZE-1))
#if CONFIG_PGTABLE_LEVELS == 3
#define BITS_PER_PMD (PAGE_SHIFT + PMD_ORDER - BITS_PER_PMD_ENTRY) #define BITS_PER_PMD (PAGE_SHIFT + PMD_ORDER - BITS_PER_PMD_ENTRY)
#define PTRS_PER_PMD (1UL << BITS_PER_PMD)
#else #else
#define __PAGETABLE_PMD_FOLDED 1
#define BITS_PER_PMD 0 #define BITS_PER_PMD 0
#endif #endif
#define PTRS_PER_PMD (1UL << BITS_PER_PMD)
/* Definitions for 1st level */ /* Definitions for 1st level */
#define PGDIR_SHIFT (PMD_SHIFT + BITS_PER_PMD) #define PGDIR_SHIFT (PLD_SHIFT + BITS_PER_PTE + BITS_PER_PMD)
#if (PGDIR_SHIFT + PAGE_SHIFT + PGD_ORDER - BITS_PER_PGD_ENTRY) > BITS_PER_LONG #if (PGDIR_SHIFT + PAGE_SHIFT + PGD_ORDER - BITS_PER_PGD_ENTRY) > BITS_PER_LONG
#define BITS_PER_PGD (BITS_PER_LONG - PGDIR_SHIFT) #define BITS_PER_PGD (BITS_PER_LONG - PGDIR_SHIFT)
#else #else
...@@ -317,6 +323,8 @@ extern unsigned long *empty_zero_page; ...@@ -317,6 +323,8 @@ extern unsigned long *empty_zero_page;
#define pmd_flag(x) (pmd_val(x) & PxD_FLAG_MASK) #define pmd_flag(x) (pmd_val(x) & PxD_FLAG_MASK)
#define pmd_address(x) ((unsigned long)(pmd_val(x) &~ PxD_FLAG_MASK) << PxD_VALUE_SHIFT) #define pmd_address(x) ((unsigned long)(pmd_val(x) &~ PxD_FLAG_MASK) << PxD_VALUE_SHIFT)
#define pud_flag(x) (pud_val(x) & PxD_FLAG_MASK)
#define pud_address(x) ((unsigned long)(pud_val(x) &~ PxD_FLAG_MASK) << PxD_VALUE_SHIFT)
#define pgd_flag(x) (pgd_val(x) & PxD_FLAG_MASK) #define pgd_flag(x) (pgd_val(x) & PxD_FLAG_MASK)
#define pgd_address(x) ((unsigned long)(pgd_val(x) &~ PxD_FLAG_MASK) << PxD_VALUE_SHIFT) #define pgd_address(x) ((unsigned long)(pgd_val(x) &~ PxD_FLAG_MASK) << PxD_VALUE_SHIFT)
...@@ -334,42 +342,32 @@ static inline void pmd_clear(pmd_t *pmd) { ...@@ -334,42 +342,32 @@ static inline void pmd_clear(pmd_t *pmd) {
if (pmd_flag(*pmd) & PxD_FLAG_ATTACHED) if (pmd_flag(*pmd) & PxD_FLAG_ATTACHED)
/* This is the entry pointing to the permanent pmd /* This is the entry pointing to the permanent pmd
* attached to the pgd; cannot clear it */ * attached to the pgd; cannot clear it */
__pmd_val_set(*pmd, PxD_FLAG_ATTACHED); set_pmd(pmd, __pmd(PxD_FLAG_ATTACHED));
else else
#endif #endif
__pmd_val_set(*pmd, 0); set_pmd(pmd, __pmd(0));
} }
#if CONFIG_PGTABLE_LEVELS == 3 #if CONFIG_PGTABLE_LEVELS == 3
#define pgd_page_vaddr(pgd) ((unsigned long) __va(pgd_address(pgd))) #define pud_page_vaddr(pud) ((unsigned long) __va(pud_address(pud)))
#define pgd_page(pgd) virt_to_page((void *)pgd_page_vaddr(pgd)) #define pud_page(pud) virt_to_page((void *)pud_page_vaddr(pud))
/* For 64 bit we have three level tables */ /* For 64 bit we have three level tables */
#define pgd_none(x) (!pgd_val(x)) #define pud_none(x) (!pud_val(x))
#define pgd_bad(x) (!(pgd_flag(x) & PxD_FLAG_VALID)) #define pud_bad(x) (!(pud_flag(x) & PxD_FLAG_VALID))
#define pgd_present(x) (pgd_flag(x) & PxD_FLAG_PRESENT) #define pud_present(x) (pud_flag(x) & PxD_FLAG_PRESENT)
static inline void pgd_clear(pgd_t *pgd) { static inline void pud_clear(pud_t *pud) {
#if CONFIG_PGTABLE_LEVELS == 3 #if CONFIG_PGTABLE_LEVELS == 3
if(pgd_flag(*pgd) & PxD_FLAG_ATTACHED) if(pud_flag(*pud) & PxD_FLAG_ATTACHED)
/* This is the permanent pmd attached to the pgd; cannot /* This is the permanent pmd attached to the pud; cannot
* free it */ * free it */
return; return;
#endif #endif
__pgd_val_set(*pgd, 0); set_pud(pud, __pud(0));
} }
#else
/*
* The "pgd_xxx()" functions here are trivial for a folded two-level
* setup: the pgd is never bad, and a pmd always exists (as it's folded
* into the pgd entry)
*/
static inline int pgd_none(pgd_t pgd) { return 0; }
static inline int pgd_bad(pgd_t pgd) { return 0; }
static inline int pgd_present(pgd_t pgd) { return 1; }
static inline void pgd_clear(pgd_t * pgdp) { }
#endif #endif
/* /*
...@@ -452,7 +450,7 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) ...@@ -452,7 +450,7 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
#if CONFIG_PGTABLE_LEVELS == 3 #if CONFIG_PGTABLE_LEVELS == 3
#define pmd_index(addr) (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1)) #define pmd_index(addr) (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1))
#define pmd_offset(dir,address) \ #define pmd_offset(dir,address) \
((pmd_t *) pgd_page_vaddr(*(dir)) + pmd_index(address)) ((pmd_t *) pud_page_vaddr(*(dir)) + pmd_index(address))
#else #else
#define pmd_offset(dir,addr) ((pmd_t *) dir) #define pmd_offset(dir,addr) ((pmd_t *) dir)
#endif #endif
......
...@@ -4,7 +4,9 @@ ...@@ -4,7 +4,9 @@
#include <asm-generic/tlb.h> #include <asm-generic/tlb.h>
#if CONFIG_PGTABLE_LEVELS == 3
#define __pmd_free_tlb(tlb, pmd, addr) pmd_free((tlb)->mm, pmd) #define __pmd_free_tlb(tlb, pmd, addr) pmd_free((tlb)->mm, pmd)
#endif
#define __pte_free_tlb(tlb, pte, addr) pte_free((tlb)->mm, pte) #define __pte_free_tlb(tlb, pte, addr) pte_free((tlb)->mm, pte)
#endif #endif
...@@ -534,11 +534,14 @@ static inline pte_t *get_ptep(pgd_t *pgd, unsigned long addr) ...@@ -534,11 +534,14 @@ static inline pte_t *get_ptep(pgd_t *pgd, unsigned long addr)
pte_t *ptep = NULL; pte_t *ptep = NULL;
if (!pgd_none(*pgd)) { if (!pgd_none(*pgd)) {
pud_t *pud = pud_offset(pgd, addr); p4d_t *p4d = p4d_offset(pgd, addr);
if (!pud_none(*pud)) { if (!p4d_none(*p4d)) {
pmd_t *pmd = pmd_offset(pud, addr); pud_t *pud = pud_offset(p4d, addr);
if (!pmd_none(*pmd)) if (!pud_none(*pud)) {
ptep = pte_offset_map(pmd, addr); pmd_t *pmd = pmd_offset(pud, addr);
if (!pmd_none(*pmd))
ptep = pte_offset_map(pmd, addr);
}
} }
} }
return ptep; return ptep;
......
...@@ -133,9 +133,14 @@ static inline int map_uncached_pages(unsigned long vaddr, unsigned long size, ...@@ -133,9 +133,14 @@ static inline int map_uncached_pages(unsigned long vaddr, unsigned long size,
dir = pgd_offset_k(vaddr); dir = pgd_offset_k(vaddr);
do { do {
p4d_t *p4d;
pud_t *pud;
pmd_t *pmd; pmd_t *pmd;
pmd = pmd_alloc(NULL, dir, vaddr); p4d = p4d_offset(dir, vaddr);
pud = pud_offset(p4d, vaddr);
pmd = pmd_alloc(NULL, pud, vaddr);
if (!pmd) if (!pmd)
return -ENOMEM; return -ENOMEM;
if (map_pmd_uncached(pmd, vaddr, end - vaddr, &paddr)) if (map_pmd_uncached(pmd, vaddr, end - vaddr, &paddr))
......
...@@ -14,11 +14,13 @@ void notrace set_fixmap(enum fixed_addresses idx, phys_addr_t phys) ...@@ -14,11 +14,13 @@ void notrace set_fixmap(enum fixed_addresses idx, phys_addr_t phys)
{ {
unsigned long vaddr = __fix_to_virt(idx); unsigned long vaddr = __fix_to_virt(idx);
pgd_t *pgd = pgd_offset_k(vaddr); pgd_t *pgd = pgd_offset_k(vaddr);
pmd_t *pmd = pmd_offset(pgd, vaddr); p4d_t *p4d = p4d_offset(pgd, vaddr);
pud_t *pud = pud_offset(p4d, vaddr);
pmd_t *pmd = pmd_offset(pud, vaddr);
pte_t *pte; pte_t *pte;
if (pmd_none(*pmd)) if (pmd_none(*pmd))
pmd = pmd_alloc(NULL, pgd, vaddr); pmd = pmd_alloc(NULL, pud, vaddr);
pte = pte_offset_kernel(pmd, vaddr); pte = pte_offset_kernel(pmd, vaddr);
if (pte_none(*pte)) if (pte_none(*pte))
...@@ -32,7 +34,9 @@ void notrace clear_fixmap(enum fixed_addresses idx) ...@@ -32,7 +34,9 @@ void notrace clear_fixmap(enum fixed_addresses idx)
{ {
unsigned long vaddr = __fix_to_virt(idx); unsigned long vaddr = __fix_to_virt(idx);
pgd_t *pgd = pgd_offset_k(vaddr); pgd_t *pgd = pgd_offset_k(vaddr);
pmd_t *pmd = pmd_offset(pgd, vaddr); p4d_t *p4d = p4d_offset(pgd, vaddr);
pud_t *pud = pud_offset(p4d, vaddr);
pmd_t *pmd = pmd_offset(pud, vaddr);
pte_t *pte = pte_offset_kernel(pmd, vaddr); pte_t *pte = pte_offset_kernel(pmd, vaddr);
if (WARN_ON(pte_none(*pte))) if (WARN_ON(pte_none(*pte)))
......
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