linux-toradex.git/arch/hexagon/mm, branch master

arch, mm: consolidate initialization of nodes, zones and memory map

2026-01-27T04:02:18+00:00

To initialize node, zone and memory map data structures every architecture
calls free_area_init() during setup_arch() and passes it an array of zone
limits.

Beside code duplication it creates "interesting" ordering cases between
allocation and initialization of hugetlb and the memory map.  Some
architectures allocate hugetlb pages very early in setup_arch() in certain
cases, some only create hugetlb CMA areas in setup_arch() and sometimes
hugetlb allocations happen mm_core_init().

With arch_zone_limits_init() helper available now on all architectures it
is no longer necessary to call free_area_init() from architecture setup
code.  Rather core MM initialization can call arch_zone_limits_init() in a
single place.

This allows to unify ordering of hugetlb vs memory map allocation and
initialization.

Remove the call to free_area_init() from architecture specific code and
place it in a new mm_core_init_early() function that is called immediately
after setup_arch().

After this refactoring it is possible to consolidate hugetlb allocations
and eliminate differences in ordering of hugetlb and memory map
initialization among different architectures.

As the first step of this consolidation move hugetlb_bootmem_alloc() to
mm_core_early_init().

Link: https://lkml.kernel.org/r/20260111082105.290734-24-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) 
Cc: Alexander Gordeev 
Cc: Alex Shi 
Cc: Andreas Larsson 
Cc: "Borislav Petkov (AMD)" 
Cc: Catalin Marinas 
Cc: David Hildenbrand 
Cc: David S. Miller 
Cc: Dinh Nguyen 
Cc: Geert Uytterhoeven 
Cc: Guo Ren 
Cc: Heiko Carstens 
Cc: Helge Deller 
Cc: Huacai Chen 
Cc: Ingo Molnar 
Cc: Johannes Berg 
Cc: John Paul Adrian Glaubitz 
Cc: Jonathan Corbet 
Cc: Klara Modin 
Cc: Liam Howlett 
Cc: Lorenzo Stoakes 
Cc: Magnus Lindholm 
Cc: Matt Turner 
Cc: Max Filippov 
Cc: Michael Ellerman 
Cc: Michal Hocko 
Cc: Michal Simek 
Cc: Muchun Song 
Cc: Oscar Salvador 
Cc: Palmer Dabbelt 
Cc: Pratyush Yadav 
Cc: Richard Weinberger 
Cc: "Ritesh Harjani (IBM)" 
Cc: Russell King 
Cc: Stafford Horne 
Cc: Suren Baghdasaryan 
Cc: Thomas Bogendoerfer 
Cc: Thomas Gleixner 
Cc: Vasily Gorbik 
Cc: Vineet Gupta 
Cc: Vlastimil Babka 
Cc: Will Deacon 
Signed-off-by: Andrew Morton

hexagon: introduce arch_zone_limits_init()

2026-01-27T04:02:14+00:00

Move calculations of zone limits to a dedicated arch_zone_limits_init()
function.

Later MM core will use this function as an architecture specific callback
during nodes and zones initialization and thus there won't be a need to
call free_area_init() from every architecture.

Link: https://lkml.kernel.org/r/20260111082105.290734-8-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) 
Cc: Alexander Gordeev 
Cc: Alex Shi 
Cc: Andreas Larsson 
Cc: "Borislav Petkov (AMD)" 
Cc: Catalin Marinas 
Cc: David Hildenbrand 
Cc: David S. Miller 
Cc: Dinh Nguyen 
Cc: Geert Uytterhoeven 
Cc: Guo Ren 
Cc: Heiko Carstens 
Cc: Helge Deller 
Cc: Huacai Chen 
Cc: Ingo Molnar 
Cc: Johannes Berg 
Cc: John Paul Adrian Glaubitz 
Cc: Jonathan Corbet 
Cc: Klara Modin 
Cc: Liam Howlett 
Cc: Lorenzo Stoakes 
Cc: Magnus Lindholm 
Cc: Matt Turner 
Cc: Max Filippov 
Cc: Michael Ellerman 
Cc: Michal Hocko 
Cc: Michal Simek 
Cc: Muchun Song 
Cc: Oscar Salvador 
Cc: Palmer Dabbelt 
Cc: Pratyush Yadav 
Cc: Richard Weinberger 
Cc: "Ritesh Harjani (IBM)" 
Cc: Russell King 
Cc: Stafford Horne 
Cc: Suren Baghdasaryan 
Cc: Thomas Bogendoerfer 
Cc: Thomas Gleixner 
Cc: Vasily Gorbik 
Cc: Vineet Gupta 
Cc: Vlastimil Babka 
Cc: Will Deacon 
Signed-off-by: Andrew Morton

arch, mm: make releasing of memory to page allocator more explicit

2025-03-18T05:06:53+00:00

The point where the memory is released from memblock to the buddy
allocator is hidden inside arch-specific mem_init()s and the call to
memblock_free_all() is needlessly duplicated in every artiste cure and
after introduction of arch_mm_preinit() hook, mem_init() implementation on
many architecture only contains the call to memblock_free_all().

Pull memblock_free_all() call into mm_core_init() and drop mem_init() on
relevant architectures to make it more explicit where the free memory is
released from memblock to the buddy allocator and to reduce code
duplication in architecture specific code.

Link: https://lkml.kernel.org/r/20250313135003.836600-14-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) 
Acked-by: Dave Hansen 	[x86]
Acked-by: Geert Uytterhoeven 	[m68k]
Tested-by: Mark Brown 
Cc: Alexander Gordeev 
Cc: Andreas Larsson 
Cc: Andy Lutomirski 
Cc: Ard Biesheuvel 
Cc: Arnd Bergmann 
Cc: Borislav Betkov 
Cc: Catalin Marinas 
Cc: David S. Miller 
Cc: Dinh Nguyen 
Cc: Gerald Schaefer 
Cc: Guo Ren (csky) 
Cc: Heiko Carstens 
Cc: Helge Deller 
Cc: Huacai Chen 
Cc: Ingo Molnar 
Cc: Jiaxun Yang 
Cc: Johannes Berg 
Cc: John Paul Adrian Glaubitz 
Cc: Madhavan Srinivasan 
Cc: Matt Turner 
Cc: Max Filippov 
Cc: Michael Ellerman 
Cc: Michal Simek 
Cc: Palmer Dabbelt 
Cc: Richard Weinberger 
Cc: Russel King 
Cc: Stafford Horne 
Cc: Thomas Bogendoerfer 
Cc: Thomas Gleinxer 
Cc: Vasily Gorbik 
Cc: Vineet Gupta 
Cc: Will Deacon 
Signed-off-by: Andrew Morton

arch, mm: set high_memory in free_area_init()

2025-03-18T05:06:52+00:00

high_memory defines upper bound on the directly mapped memory.  This bound
is defined by the beginning of ZONE_HIGHMEM when a system has high memory
and by the end of memory otherwise.

All this is known to generic memory management initialization code that
can set high_memory while initializing core mm structures.

Add a generic calculation of high_memory to free_area_init() and remove
per-architecture calculation except for the architectures that set and use
high_memory earlier than that.

Link: https://lkml.kernel.org/r/20250313135003.836600-11-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) 
Acked-by: Dave Hansen 	[x86]
Tested-by: Mark Brown 
Cc: Alexander Gordeev 
Cc: Andreas Larsson 
Cc: Andy Lutomirski 
Cc: Ard Biesheuvel 
Cc: Arnd Bergmann 
Cc: Borislav Betkov 
Cc: Catalin Marinas 
Cc: David S. Miller 
Cc: Dinh Nguyen 
Cc: Geert Uytterhoeven 
Cc: Gerald Schaefer 
Cc: Guo Ren (csky) 
Cc: Heiko Carstens 
Cc: Helge Deller 
Cc: Huacai Chen 
Cc: Ingo Molnar 
Cc: Jiaxun Yang 
Cc: Johannes Berg 
Cc: John Paul Adrian Glaubitz 
Cc: Madhavan Srinivasan 
Cc: Matt Turner 
Cc: Max Filippov 
Cc: Michael Ellerman 
Cc: Michal Simek 
Cc: Palmer Dabbelt 
Cc: Richard Weinberger 
Cc: Russel King 
Cc: Stafford Horne 
Cc: Thomas Bogendoerfer 
Cc: Thomas Gleinxer 
Cc: Vasily Gorbik 
Cc: Vineet Gupta 
Cc: Will Deacon 
Signed-off-by: Andrew Morton

hexagon: move initialization of init_mm.context init to paging_init()

2025-03-18T05:06:51+00:00

This will help with pulling out memblock_free_all() to the generic
code and reducing code duplication in arch::mem_init().

Link: https://lkml.kernel.org/r/20250313135003.836600-4-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) 
Cc: Alexander Gordeev 
Cc: Andreas Larsson 
Cc: Andy Lutomirski 
Cc: Ard Biesheuvel 
Cc: Arnd Bergmann 
Cc: Borislav Betkov 
Cc: Catalin Marinas 
Cc: Dave Hansen 
Cc: David S. Miller 
Cc: Dinh Nguyen 
Cc: Geert Uytterhoeven 
Cc: Gerald Schaefer 
Cc: Guo Ren (csky) 
Cc: Heiko Carstens 
Cc: Helge Deller 
Cc: Huacai Chen 
Cc: Ingo Molnar 
Cc: Jiaxun Yang 
Cc: Johannes Berg 
Cc: John Paul Adrian Glaubitz 
Cc: Madhavan Srinivasan 
Cc: Mark Brown 
Cc: Matt Turner 
Cc: Max Filippov 
Cc: Michael Ellerman 
Cc: Michal Simek 
Cc: Palmer Dabbelt 
Cc: Richard Weinberger 
Cc: Russel King 
Cc: Stafford Horne 
Cc: Thomas Bogendoerfer 
Cc: Thomas Gleinxer 
Cc: Vasily Gorbik 
Cc: Vineet Gupta 
Cc: Will Deacon 
Signed-off-by: Andrew Morton

hexagon: vm_tlb: include asm/tlbflush.h for prototypes

2023-12-11T01:21:35+00:00

Clang warns about several missing prototypes that are declared in this
header:

  arch/hexagon/mm/vm_tlb.c:25:6: warning: no previous prototype for function 'flush_tlb_range' [-Wmissing-prototypes]
     25 | void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
        |      ^
  arch/hexagon/mm/vm_tlb.c:25:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     25 | void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
        | ^
        | static
  arch/hexagon/mm/vm_tlb.c:37:6: warning: no previous prototype for function 'flush_tlb_one' [-Wmissing-prototypes]
     37 | void flush_tlb_one(unsigned long vaddr)
        |      ^
  arch/hexagon/mm/vm_tlb.c:37:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     37 | void flush_tlb_one(unsigned long vaddr)
        | ^
        | static
  arch/hexagon/mm/vm_tlb.c:47:6: warning: no previous prototype for function 'tlb_flush_all' [-Wmissing-prototypes]
     47 | void tlb_flush_all(void)
        |      ^
  arch/hexagon/mm/vm_tlb.c:47:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     47 | void tlb_flush_all(void)
        | ^
        | static
  arch/hexagon/mm/vm_tlb.c:56:6: warning: no previous prototype for function 'flush_tlb_mm' [-Wmissing-prototypes]
     56 | void flush_tlb_mm(struct mm_struct *mm)
        |      ^
  arch/hexagon/mm/vm_tlb.c:56:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     56 | void flush_tlb_mm(struct mm_struct *mm)
        | ^
        | static
  arch/hexagon/mm/vm_tlb.c:66:6: warning: no previous prototype for function 'flush_tlb_page' [-Wmissing-prototypes]
     66 | void flush_tlb_page(struct vm_area_struct *vma, unsigned long vaddr)
        |      ^
  arch/hexagon/mm/vm_tlb.c:66:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     66 | void flush_tlb_page(struct vm_area_struct *vma, unsigned long vaddr)
        | ^
        | static
  arch/hexagon/mm/vm_tlb.c:78:6: warning: no previous prototype for function 'flush_tlb_kernel_range' [-Wmissing-prototypes]
     78 | void flush_tlb_kernel_range(unsigned long start, unsigned long end)
        |      ^
  arch/hexagon/mm/vm_tlb.c:78:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     78 | void flush_tlb_kernel_range(unsigned long start, unsigned long end)
        | ^
        | static
  6 warnings generated.

Link: https://lkml.kernel.org/r/20231130-hexagon-missing-prototypes-v1-7-5c34714afe9e@kernel.org
Signed-off-by: Nathan Chancellor 
Cc: Arnd Bergmann 
Cc: Brian Cain 
Signed-off-by: Andrew Morton

hexagon: vm_fault: include asm/vm_fault.h for prototypes

2023-12-11T01:21:34+00:00

Clang warns:

  arch/hexagon/mm/vm_fault.c:157:6: warning: no previous prototype for function 'read_protection_fault' [-Wmissing-prototypes]
    157 | void read_protection_fault(struct pt_regs *regs)
        |      ^
  arch/hexagon/mm/vm_fault.c:157:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    157 | void read_protection_fault(struct pt_regs *regs)
        | ^
        | static
  arch/hexagon/mm/vm_fault.c:164:6: warning: no previous prototype for function 'write_protection_fault' [-Wmissing-prototypes]
    164 | void write_protection_fault(struct pt_regs *regs)
        |      ^
  arch/hexagon/mm/vm_fault.c:164:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    164 | void write_protection_fault(struct pt_regs *regs)
        | ^
        | static
  arch/hexagon/mm/vm_fault.c:171:6: warning: no previous prototype for function 'execute_protection_fault' [-Wmissing-prototypes]
    171 | void execute_protection_fault(struct pt_regs *regs)
        |      ^
  arch/hexagon/mm/vm_fault.c:171:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    171 | void execute_protection_fault(struct pt_regs *regs)
        | ^
        | static

The prototypes for these functions are defined in asm/vm_fault.h, so
include it to pick them up and silence the warnings.

Link: https://lkml.kernel.org/r/20231130-hexagon-missing-prototypes-v1-6-5c34714afe9e@kernel.org
Signed-off-by: Nathan Chancellor 
Cc: Arnd Bergmann 
Cc: Brian Cain 
Signed-off-by: Andrew Morton

hexagon: vm_fault: mark do_page_fault() as static

2023-12-11T01:21:34+00:00

Clang warns:

  arch/hexagon/mm/vm_fault.c:36:6: warning: no previous prototype for function 'do_page_fault' [-Wmissing-prototypes]
     36 | void do_page_fault(unsigned long address, long cause, struct pt_regs *regs)
        |      ^
  arch/hexagon/mm/vm_fault.c:36:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     36 | void do_page_fault(unsigned long address, long cause, struct pt_regs *regs)
        | ^
        | static

This function is not used outside of this translation unit, so mark it
as static.

Link: https://lkml.kernel.org/r/20231130-hexagon-missing-prototypes-v1-5-5c34714afe9e@kernel.org
Signed-off-by: Nathan Chancellor 
Cc: Arnd Bergmann 
Cc: Brian Cain 
Signed-off-by: Andrew Morton

hexagon: mm: include asm/setup.h for setup_arch_memory()'s prototype

2023-12-11T01:21:34+00:00

Clang warns:

  arch/hexagon/mm/init.c:138:13: warning: no previous prototype for function 'setup_arch_memory' [-Wmissing-prototypes]
    138 | void __init setup_arch_memory(void)
        |             ^
  arch/hexagon/mm/init.c:138:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    138 | void __init setup_arch_memory(void)
        | ^
        | static

The prototype is in asm/setup.h, include it to clear up the warning.

Link: https://lkml.kernel.org/r/20231130-hexagon-missing-prototypes-v1-3-5c34714afe9e@kernel.org
Signed-off-by: Nathan Chancellor 
Cc: Arnd Bergmann 
Cc: Brian Cain 
Signed-off-by: Andrew Morton

hexagon: mm: mark paging_init() as static

2023-12-11T01:21:33+00:00

Clang warns:

  arch/hexagon/mm/init.c:89:13: warning: no previous prototype for function 'paging_init' [-Wmissing-prototypes]
     89 | void __init paging_init(void)
        |             ^
  arch/hexagon/mm/init.c:89:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     89 | void __init paging_init(void)
        | ^
        | static

This function is only used within this translation unit, so mark it static
as suggested.

Link: https://lkml.kernel.org/r/20231130-hexagon-missing-prototypes-v1-2-5c34714afe9e@kernel.org
Signed-off-by: Nathan Chancellor 
Cc: Arnd Bergmann 
Cc: Brian Cain 
Signed-off-by: Andrew Morton