linux.git/arch/mips/include/asm/pgalloc.h, branch v6.6.131

mips: convert various functions to use ptdescs

2023-08-21T20:37:56+00:00

As part of the conversions to replace pgtable constructor/destructors with
ptdesc equivalents, convert various page table functions to use ptdescs.

Some of the functions use the *get*page*() helper functions.  Convert
these to use pagetable_alloc() and ptdesc_address() instead to help
standardize page tables further.

Link: https://lkml.kernel.org/r/20230807230513.102486-24-vishal.moola@gmail.com
Signed-off-by: Vishal Moola (Oracle) 
Acked-by: Mike Rapoport (IBM) 
Cc: Arnd Bergmann 
Cc: Catalin Marinas 
Cc: Christophe Leroy 
Cc: Claudio Imbrenda 
Cc: Dave Hansen 
Cc: David Hildenbrand 
Cc: "David S. Miller" 
Cc: Dinh Nguyen 
Cc: Geert Uytterhoeven 
Cc: Geert Uytterhoeven 
Cc: Guo Ren 
Cc: Huacai Chen 
Cc: Hugh Dickins 
Cc: John Paul Adrian Glaubitz 
Cc: Jonas Bonn 
Cc: Matthew Wilcox 
Cc: Palmer Dabbelt 
Cc: Paul Walmsley 
Cc: Richard Weinberger 
Cc: Thomas Bogendoerfer 
Cc: Yoshinori Sato 
Signed-off-by: Andrew Morton

MIPS&LoongArch&NIOS2: adjust prototypes of p?d_init()

2022-12-12T02:12:11+00:00

Patch series "mm/sparse-vmemmap: Generalise helpers and enable for
LoongArch", v14.

This series is in order to enable sparse-vmemmap for LoongArch.  But
LoongArch cannot use generic helpers directly because MIPS&LoongArch need
to call pgd_init()/pud_init()/pmd_init() when populating page tables.  So
we adjust the prototypes of p?d_init() to make generic helpers can call
them, then enable sparse-vmemmap with generic helpers, and to be further,
generalise vmemmap_populate_hugepages() for ARM64, X86 and LoongArch.


This patch (of 4):

We are preparing to add sparse vmemmap support to LoongArch.  MIPS and
LoongArch need to call pgd_init()/pud_init()/pmd_init() when populating
page tables, so adjust their prototypes to make generic helpers can call
them.

NIOS2 declares pmd_init() but doesn't use, just remove it to avoid build
errors.

Link: https://lkml.kernel.org/r/20221027125253.3458989-1-chenhuacai@loongson.cn
Link: https://lkml.kernel.org/r/20221027125253.3458989-2-chenhuacai@loongson.cn
Signed-off-by: Feiyang Chen 
Signed-off-by: Huacai Chen 
Reviewed-by: Jiaxun Yang 
Reviewed-by: Philippe Mathieu-Daudé 
Reviewed-by: Arnd Bergmann 
Cc: Andy Lutomirski 
Cc: Catalin Marinas 
Cc: Dave Hansen 
Cc: Dinh Nguyen 
Cc: Guo Ren 
Cc: Peter Zijlstra 
Cc: Thomas Bogendoerfer 
Cc: Will Deacon 
Cc: Xuefeng Li 
Cc: Xuerui Wang 
Cc: Min Zhou 
Cc: Muchun Song 
Signed-off-by: Andrew Morton

mips: rename PGD_ORDER to PGD_TABLE_ORDER

2022-07-18T00:14:42+00:00

This is the order of the page table allocation, not the order of a PGD.

While at it remove unused defintion of _PGD_ORDER in asm-offsets.

Link: https://lkml.kernel.org/r/20220703141203.147893-7-rppt@kernel.org
Signed-off-by: Mike Rapoport 
Cc: Arnd Bergmann 
Cc: Dinh Nguyen 
Cc: Guo Ren 
Cc: Helge Deller 
Cc: Huacai Chen 
Cc: James Bottomley 
Cc: "Matthew Wilcox (Oracle)" 
Cc: Max Filippov 
Cc: Thomas Bogendoerfer 
Cc: Xuerui Wang 
Signed-off-by: Andrew Morton

mips: rename PUD_ORDER to PUD_TABLE_ORDER

2022-07-18T00:14:42+00:00

This is the order of the page table allocation, not the order of a PUD.

Link: https://lkml.kernel.org/r/20220703141203.147893-5-rppt@kernel.org
Signed-off-by: Mike Rapoport 
Cc: Arnd Bergmann 
Cc: Dinh Nguyen 
Cc: Guo Ren 
Cc: Helge Deller 
Cc: Huacai Chen 
Cc: James Bottomley 
Cc: "Matthew Wilcox (Oracle)" 
Cc: Max Filippov 
Cc: Thomas Bogendoerfer 
Cc: Xuerui Wang 
Signed-off-by: Andrew Morton

mips: rename PMD_ORDER to PMD_TABLE_ORDER

2022-07-18T00:14:42+00:00

This is the order of the page table allocation, not the order of a PMD.

While at it remove unused defintion of _PMD_ORDER in asm-offsets.

Link: https://lkml.kernel.org/r/20220703141203.147893-4-rppt@kernel.org
Signed-off-by: Matthew Wilcox (Oracle) 
Signed-off-by: Mike Rapoport 
Cc: Arnd Bergmann 
Cc: Dinh Nguyen 
Cc: Guo Ren 
Cc: Helge Deller 
Cc: Huacai Chen 
Cc: James Bottomley 
Cc: Max Filippov 
Cc: Thomas Bogendoerfer 
Cc: Xuerui Wang 
Signed-off-by: Andrew Morton

MIPS: pgalloc: fix memory leak caused by pgd_free()

2022-03-14T14:05:18+00:00

pgd page is freed by generic implementation pgd_free() since commit
f9cb654cb550 ("asm-generic: pgalloc: provide generic pgd_free()"),
however, there are scenarios that the system uses more than one page as
the pgd table, in such cases the generic implementation pgd_free() won't
be applicable anymore. For example, when PAGE_SIZE_4KB is enabled and
MIPS_VA_BITS_48 is not enabled in a 64bit system, the macro "PGD_ORDER"
will be set as "1", which will cause allocating two pages as the pgd
table. Well, at the same time, the generic implementation pgd_free()
just free one pgd page, which will result in the memory leak.

The memory leak can be easily detected by executing shell command:
"while true; do ls > /dev/null; grep MemFree /proc/meminfo; done"

Fixes: f9cb654cb550 ("asm-generic: pgalloc: provide generic pgd_free()")
Signed-off-by: Yaliang Wang 
Signed-off-by: Thomas Bogendoerfer

MIPS: check return value of pgtable_pmd_page_ctor

2021-08-05T09:45:42+00:00

+. According to Documentation/vm/split_page_table_lock, handle failure
of pgtable_pmd_page_ctor

+. Use GFP_KERNEL_ACCOUNT instead of GFP_KERNEL|__GFP_ACCOUNT

+. Adjust coding style

Fixes: ed914d48b6a1 ("MIPS: add PMD table accounting into MIPS')
Reported-by: Joshua Kinard 
Signed-off-by: Huang Pei 
Reviewed-by: Joshua Kinard 
Signed-off-by: Thomas Bogendoerfer

Merge branch 'akpm' (patches from Andrew)

2021-07-02T19:08:10+00:00

Merge more updates from Andrew Morton:
 "190 patches.

  Subsystems affected by this patch series: mm (hugetlb, userfaultfd,
  vmscan, kconfig, proc, z3fold, zbud, ras, mempolicy, memblock,
  migration, thp, nommu, kconfig, madvise, memory-hotplug, zswap,
  zsmalloc, zram, cleanups, kfence, and hmm), procfs, sysctl, misc,
  core-kernel, lib, lz4, checkpatch, init, kprobes, nilfs2, hfs,
  signals, exec, kcov, selftests, compress/decompress, and ipc"

* emailed patches from Andrew Morton : (190 commits)
  ipc/util.c: use binary search for max_idx
  ipc/sem.c: use READ_ONCE()/WRITE_ONCE() for use_global_lock
  ipc: use kmalloc for msg_queue and shmid_kernel
  ipc sem: use kvmalloc for sem_undo allocation
  lib/decompressors: remove set but not used variabled 'level'
  selftests/vm/pkeys: exercise x86 XSAVE init state
  selftests/vm/pkeys: refill shadow register after implicit kernel write
  selftests/vm/pkeys: handle negative sys_pkey_alloc() return code
  selftests/vm/pkeys: fix alloc_random_pkey() to make it really, really random
  kcov: add __no_sanitize_coverage to fix noinstr for all architectures
  exec: remove checks in __register_bimfmt()
  x86: signal: don't do sas_ss_reset() until we are certain that sigframe won't be abandoned
  hfsplus: report create_date to kstat.btime
  hfsplus: remove unnecessary oom message
  nilfs2: remove redundant continue statement in a while-loop
  kprobes: remove duplicated strong free_insn_page in x86 and s390
  init: print out unknown kernel parameters
  checkpatch: do not complain about positive return values starting with EPOLL
  checkpatch: improve the indented label test
  checkpatch: scripts/spdxcheck.py now requires python3
  ...

mm/thp: define default pmd_pgtable()

2021-07-01T18:06:03+00:00

Currently most platforms define pmd_pgtable() as pmd_page() duplicating
the same code all over.  Instead just define a default value i.e
pmd_page() for pmd_pgtable() and let platforms override when required via
.  All the existing platform that override pmd_pgtable()
have been moved into their respective  header in order to
precede before the new generic definition.  This makes it much cleaner
with reduced code.

Link: https://lkml.kernel.org/r/1623646133-20306-1-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual 
Acked-by: Geert Uytterhoeven 
Acked-by: Mike Rapoport 
Cc: Nick Hu 
Cc: Richard Henderson 
Cc: Vineet Gupta 
Cc: Catalin Marinas 
Cc: Will Deacon 
Cc: Guo Ren 
Cc: Brian Cain 
Cc: Geert Uytterhoeven 
Cc: Michal Simek 
Cc: Thomas Bogendoerfer 
Cc: Ley Foon Tan 
Cc: Jonas Bonn 
Cc: Stefan Kristiansson 
Cc: Stafford Horne 
Cc: "James E.J. Bottomley" 
Cc: Michael Ellerman 
Cc: Christophe Leroy 
Cc: Paul Walmsley 
Cc: Palmer Dabbelt 
Cc: Heiko Carstens 
Cc: Yoshinori Sato 
Cc: "David S. Miller" 
Cc: Jeff Dike 
Cc: Thomas Gleixner 
Cc: Chris Zankel 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

MIPS: add PMD table accounting into MIPS'pmd_alloc_one

2021-06-21T09:27:30+00:00

This fixes Page Table accounting bug.

MIPS is the ONLY arch just defining __HAVE_ARCH_PMD_ALLOC_ONE alone.
Since commit b2b29d6d011944 (mm: account PMD tables like PTE tables),
"pmd_free" in asm-generic with PMD table accounting and "pmd_alloc_one"
in MIPS without PMD table accounting causes PageTable accounting number
negative, which read by global_zone_page_state(), always returns 0.

Signed-off-by: Huang Pei 
Signed-off-by: Thomas Bogendoerfer