2009-03-27 07:25:37 -06:00
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/*
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2009-05-26 08:30:17 -06:00
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* Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
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* Copyright (C) 2008-2009 PetaLogix
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2009-03-27 07:25:37 -06:00
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* Copyright (C) 2006 Atmark Techno, Inc.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#ifndef _ASM_MICROBLAZE_PGALLOC_H
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#define _ASM_MICROBLAZE_PGALLOC_H
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2009-05-26 08:30:17 -06:00
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#ifdef CONFIG_MMU
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#include <linux/kernel.h> /* For min/max macros */
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#include <linux/highmem.h>
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#include <asm/setup.h>
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#include <asm/io.h>
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#include <asm/page.h>
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#include <asm/cache.h>
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2010-01-20 07:17:08 -07:00
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#include <asm/pgtable.h>
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2009-05-26 08:30:17 -06:00
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extern void __bad_pte(pmd_t *pmd);
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2019-09-23 16:35:19 -06:00
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static inline pgd_t *get_pgd(void)
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2009-05-26 08:30:17 -06:00
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{
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2019-09-23 16:35:19 -06:00
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return (pgd_t *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, 0);
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2009-05-26 08:30:17 -06:00
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}
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2019-09-23 16:35:19 -06:00
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static inline void free_pgd(pgd_t *pgd)
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2009-05-26 08:30:17 -06:00
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{
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free_page((unsigned long)pgd);
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}
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2019-09-23 16:35:19 -06:00
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#define pgd_free(mm, pgd) free_pgd(pgd)
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#define pgd_alloc(mm) get_pgd()
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2009-05-26 08:30:17 -06:00
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#define pmd_pgtable(pmd) pmd_page(pmd)
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/*
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* We don't have any real pmd's, and this code never triggers because
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* the pgd will always be present..
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*/
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#define pmd_alloc_one_fast(mm, address) ({ BUG(); ((pmd_t *)1); })
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#define pmd_alloc_one(mm, address) ({ BUG(); ((pmd_t *)2); })
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mm: treewide: remove unused address argument from pte_alloc functions
Patch series "Add support for fast mremap".
This series speeds up the mremap(2) syscall by copying page tables at
the PMD level even for non-THP systems. There is concern that the extra
'address' argument that mremap passes to pte_alloc may do something
subtle architecture related in the future that may make the scheme not
work. Also we find that there is no point in passing the 'address' to
pte_alloc since its unused. This patch therefore removes this argument
tree-wide resulting in a nice negative diff as well. Also ensuring
along the way that the enabled architectures do not do anything funky
with the 'address' argument that goes unnoticed by the optimization.
Build and boot tested on x86-64. Build tested on arm64. The config
enablement patch for arm64 will be posted in the future after more
testing.
The changes were obtained by applying the following Coccinelle script.
(thanks Julia for answering all Coccinelle questions!).
Following fix ups were done manually:
* Removal of address argument from pte_fragment_alloc
* Removal of pte_alloc_one_fast definitions from m68k and microblaze.
// Options: --include-headers --no-includes
// Note: I split the 'identifier fn' line, so if you are manually
// running it, please unsplit it so it runs for you.
virtual patch
@pte_alloc_func_def depends on patch exists@
identifier E2;
identifier fn =~
"^(__pte_alloc|pte_alloc_one|pte_alloc|__pte_alloc_kernel|pte_alloc_one_kernel)$";
type T2;
@@
fn(...
- , T2 E2
)
{ ... }
@pte_alloc_func_proto_noarg depends on patch exists@
type T1, T2, T3, T4;
identifier fn =~ "^(__pte_alloc|pte_alloc_one|pte_alloc|__pte_alloc_kernel|pte_alloc_one_kernel)$";
@@
(
- T3 fn(T1, T2);
+ T3 fn(T1);
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- T3 fn(T1, T2, T4);
+ T3 fn(T1, T2);
)
@pte_alloc_func_proto depends on patch exists@
identifier E1, E2, E4;
type T1, T2, T3, T4;
identifier fn =~
"^(__pte_alloc|pte_alloc_one|pte_alloc|__pte_alloc_kernel|pte_alloc_one_kernel)$";
@@
(
- T3 fn(T1 E1, T2 E2);
+ T3 fn(T1 E1);
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- T3 fn(T1 E1, T2 E2, T4 E4);
+ T3 fn(T1 E1, T2 E2);
)
@pte_alloc_func_call depends on patch exists@
expression E2;
identifier fn =~
"^(__pte_alloc|pte_alloc_one|pte_alloc|__pte_alloc_kernel|pte_alloc_one_kernel)$";
@@
fn(...
-, E2
)
@pte_alloc_macro depends on patch exists@
identifier fn =~
"^(__pte_alloc|pte_alloc_one|pte_alloc|__pte_alloc_kernel|pte_alloc_one_kernel)$";
identifier a, b, c;
expression e;
position p;
@@
(
- #define fn(a, b, c) e
+ #define fn(a, b) e
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- #define fn(a, b) e
+ #define fn(a) e
)
Link: http://lkml.kernel.org/r/20181108181201.88826-2-joelaf@google.com
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Suggested-by: Kirill A. Shutemov <kirill@shutemov.name>
Acked-by: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Cc: Kirill A. Shutemov <kirill@shutemov.name>
Cc: William Kucharski <william.kucharski@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-01-03 16:28:34 -07:00
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extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm);
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2009-05-26 08:30:17 -06:00
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mm: treewide: remove unused address argument from pte_alloc functions
Patch series "Add support for fast mremap".
This series speeds up the mremap(2) syscall by copying page tables at
the PMD level even for non-THP systems. There is concern that the extra
'address' argument that mremap passes to pte_alloc may do something
subtle architecture related in the future that may make the scheme not
work. Also we find that there is no point in passing the 'address' to
pte_alloc since its unused. This patch therefore removes this argument
tree-wide resulting in a nice negative diff as well. Also ensuring
along the way that the enabled architectures do not do anything funky
with the 'address' argument that goes unnoticed by the optimization.
Build and boot tested on x86-64. Build tested on arm64. The config
enablement patch for arm64 will be posted in the future after more
testing.
The changes were obtained by applying the following Coccinelle script.
(thanks Julia for answering all Coccinelle questions!).
Following fix ups were done manually:
* Removal of address argument from pte_fragment_alloc
* Removal of pte_alloc_one_fast definitions from m68k and microblaze.
// Options: --include-headers --no-includes
// Note: I split the 'identifier fn' line, so if you are manually
// running it, please unsplit it so it runs for you.
virtual patch
@pte_alloc_func_def depends on patch exists@
identifier E2;
identifier fn =~
"^(__pte_alloc|pte_alloc_one|pte_alloc|__pte_alloc_kernel|pte_alloc_one_kernel)$";
type T2;
@@
fn(...
- , T2 E2
)
{ ... }
@pte_alloc_func_proto_noarg depends on patch exists@
type T1, T2, T3, T4;
identifier fn =~ "^(__pte_alloc|pte_alloc_one|pte_alloc|__pte_alloc_kernel|pte_alloc_one_kernel)$";
@@
(
- T3 fn(T1, T2);
+ T3 fn(T1);
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- T3 fn(T1, T2, T4);
+ T3 fn(T1, T2);
)
@pte_alloc_func_proto depends on patch exists@
identifier E1, E2, E4;
type T1, T2, T3, T4;
identifier fn =~
"^(__pte_alloc|pte_alloc_one|pte_alloc|__pte_alloc_kernel|pte_alloc_one_kernel)$";
@@
(
- T3 fn(T1 E1, T2 E2);
+ T3 fn(T1 E1);
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- T3 fn(T1 E1, T2 E2, T4 E4);
+ T3 fn(T1 E1, T2 E2);
)
@pte_alloc_func_call depends on patch exists@
expression E2;
identifier fn =~
"^(__pte_alloc|pte_alloc_one|pte_alloc|__pte_alloc_kernel|pte_alloc_one_kernel)$";
@@
fn(...
-, E2
)
@pte_alloc_macro depends on patch exists@
identifier fn =~
"^(__pte_alloc|pte_alloc_one|pte_alloc|__pte_alloc_kernel|pte_alloc_one_kernel)$";
identifier a, b, c;
expression e;
position p;
@@
(
- #define fn(a, b, c) e
+ #define fn(a, b) e
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- #define fn(a, b) e
+ #define fn(a) e
)
Link: http://lkml.kernel.org/r/20181108181201.88826-2-joelaf@google.com
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Suggested-by: Kirill A. Shutemov <kirill@shutemov.name>
Acked-by: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Cc: Kirill A. Shutemov <kirill@shutemov.name>
Cc: William Kucharski <william.kucharski@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-01-03 16:28:34 -07:00
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static inline struct page *pte_alloc_one(struct mm_struct *mm)
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2009-05-26 08:30:17 -06:00
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{
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struct page *ptepage;
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#ifdef CONFIG_HIGHPTE
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2019-09-23 16:35:19 -06:00
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int flags = GFP_KERNEL | __GFP_ZERO | __GFP_HIGHMEM;
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2009-05-26 08:30:17 -06:00
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#else
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2019-09-23 16:35:19 -06:00
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int flags = GFP_KERNEL | __GFP_ZERO;
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2009-05-26 08:30:17 -06:00
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#endif
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ptepage = alloc_pages(flags, 0);
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2013-11-14 15:31:21 -07:00
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if (!ptepage)
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return NULL;
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if (!pgtable_page_ctor(ptepage)) {
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__free_page(ptepage);
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return NULL;
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}
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2009-05-26 08:30:17 -06:00
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return ptepage;
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}
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2014-12-18 07:51:30 -07:00
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static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
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2009-05-26 08:30:17 -06:00
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{
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free_page((unsigned long)pte);
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}
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2014-12-18 07:51:30 -07:00
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static inline void pte_free_slow(struct page *ptepage)
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2009-05-26 08:30:17 -06:00
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{
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__free_page(ptepage);
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}
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2013-11-14 15:31:21 -07:00
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static inline void pte_free(struct mm_struct *mm, struct page *ptepage)
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2009-05-26 08:30:17 -06:00
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{
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2013-11-14 15:31:21 -07:00
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pgtable_page_dtor(ptepage);
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2009-05-26 08:30:17 -06:00
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__free_page(ptepage);
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}
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mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()
mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()
Upcoming paches to support the new 64-bit "BookE" powerpc architecture
will need to have the virtual address corresponding to PTE page when
freeing it, due to the way the HW table walker works.
Basically, the TLB can be loaded with "large" pages that cover the whole
virtual space (well, sort-of, half of it actually) represented by a PTE
page, and which contain an "indirect" bit indicating that this TLB entry
RPN points to an array of PTEs from which the TLB can then create direct
entries. Thus, in order to invalidate those when PTE pages are deleted,
we need the virtual address to pass to tlbilx or tlbivax instructions.
The old trick of sticking it somewhere in the PTE page struct page sucks
too much, the address is almost readily available in all call sites and
almost everybody implemets these as macros, so we may as well add the
argument everywhere. I added it to the pmd and pud variants for consistency.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: David Howells <dhowells@redhat.com> [MN10300 & FRV]
Acked-by: Nick Piggin <npiggin@suse.de>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> [s390]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-07-21 23:44:28 -06:00
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#define __pte_free_tlb(tlb, pte, addr) pte_free((tlb)->mm, (pte))
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2009-05-26 08:30:17 -06:00
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2010-08-16 03:02:18 -06:00
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#define pmd_populate(mm, pmd, pte) \
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(pmd_val(*(pmd)) = (unsigned long)page_address(pte))
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2009-05-26 08:30:17 -06:00
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#define pmd_populate_kernel(mm, pmd, pte) \
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(pmd_val(*(pmd)) = (unsigned long) (pte))
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/*
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* We don't have any real pmd's, and this code never triggers because
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* the pgd will always be present..
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*/
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#define pmd_alloc_one(mm, address) ({ BUG(); ((pmd_t *)2); })
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2009-11-23 02:15:00 -07:00
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#define pmd_free(mm, x) do { } while (0)
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#define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x)
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2009-05-26 08:30:17 -06:00
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#define pgd_populate(mm, pmd, pte) BUG()
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#endif /* CONFIG_MMU */
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2009-03-27 07:25:37 -06:00
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#endif /* _ASM_MICROBLAZE_PGALLOC_H */
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