Changes in Makefile

f9aad622 - mm: rename GENERIC_PTDUMP and PTDUMP_CORE

Wed, 26 Feb 2025 12:24:04 +0000

mm: rename GENERIC_PTDUMP and PTDUMP_COREPlatforms subscribe into generic ptdump implementation via GENERIC_PTDUMP.But generic ptdump gets enabled via PTDUMP_CORE. These configscombination is confusing as they sound very similar and does notdifferentiate between platform's feature subscription and featureenablement for ptdump. Rename the configs as ARCH_HAS_PTDUMP and PTDUMPmaking it more clear and improve readability.Link: https://lkml.kernel.org/r/20250226122404.1927473-6-anshuman.khandual@arm.comSigned-off-by: Anshuman Khandual Reviewed-by: Christophe Leroy (powerpc)Acked-by: Catalin Marinas [arm64]Cc: Will Deacon Cc: Jonathan Corbet Cc: Marc Zyngier Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Paul Walmsley Cc: Palmer Dabbelt Cc: Heiko Carstens Cc: Vasily Gorbik Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Christophe Leroy Cc: Madhavan Srinivasan Cc: Mark Rutland Cc: Steven Price Signed-off-by: Andrew Morton List of files: /linux-6.15/arch/powerpc/mm/Makefile

c330b50d - powerpc/Makefile: Remove bits related to the previous use of -mcmodel=large

Wed, 10 Jan 2024 14:12:37 +0000

powerpc/Makefile: Remove bits related to the previous use of -mcmodel=largeAll supported compilers today (gcc v5.1+ and clang v11+) have support for-mcmodel=medium. As such, NO_MINIMAL_TOC is no longer being set. RemoveNO_MINIMAL_TOC as well as the fallback to -mminimal-toc.Reviewed-by: Christophe Leroy Signed-off-by: Naveen N Rao Signed-off-by: Michael Ellerman Link: https://msgid.link/20240110141237.3179199-1-naveen@kernel.org List of files: /linux-6.15/arch/powerpc/mm/Makefile

36e5f9ee - powerpc/mm: Convert to default topdown mmap layout

Sat, 09 Apr 2022 17:17:36 +0000

powerpc/mm: Convert to default topdown mmap layoutSelect CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT andremove arch/powerpc/mm/mmap.cThis change reuses the generic framework added bycommit 67f3977f805b ("arm64, mm: move generic mmap layoutfunctions to mm") without any functional change.Comparison between powerpc implementation and the generic one:- mmap_is_legacy() is identical.- arch_mmap_rnd() does exactly the same allthough it's writtenslightly differently.- MIN_GAP and MAX_GAP are identical.- mmap_base() does the same but uses STACK_RND_MASK which providesthe same values as stack_maxrandom_size().- arch_pick_mmap_layout() is identical.Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/518f9def87d3c889d5958103e7463cf45a2f673d.1649523076.git.christophe.leroy@csgroup.eu List of files: /linux-6.15/arch/powerpc/mm/Makefile

1408fca0 - powerpc/mm: Make slice specific to book3s/64

Sat, 09 Apr 2022 17:17:30 +0000

powerpc/mm: Make slice specific to book3s/64Since commit 555904d07eef ("powerpc/8xx: MM_SLICE is not neededanymore") only book3s/64 selects CONFIG_PPC_MM_SLICES.Move slice.c into mm/book3s64/Move necessary stuff in asm/book3s/64/slice.h andremove asm/slice.hSigned-off-by: Christophe Leroy Reviewed-by: Nicholas Piggin Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/4a0d74ef1966a5902b5fd4ac4b513a760a6d675a.1649523076.git.christophe.leroy@csgroup.eu List of files: /linux-6.15/arch/powerpc/mm/Makefile

e0847283 - powerpc/ptdump: Convert powerpc to GENERIC_PTDUMP

Thu, 08 Jul 2021 16:49:43 +0000

powerpc/ptdump: Convert powerpc to GENERIC_PTDUMPThis patch converts powerpc to the generic PTDUMP implementation.Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/03166d569526be70214fe9370a7bad219d2f41c8.1625762907.git.christophe.leroy@csgroup.eu List of files: /linux-6.15/arch/powerpc/mm/Makefile

a9ee6cf5 - mm: replace CONFIG_NEED_MULTIPLE_NODES with CONFIG_NUMA

Tue, 29 Jun 2021 02:43:01 +0000

mm: replace CONFIG_NEED_MULTIPLE_NODES with CONFIG_NUMAAfter removal of DISCINTIGMEM the NEED_MULTIPLE_NODES and NUMAconfiguration options are equivalent.Drop CONFIG_NEED_MULTIPLE_NODES and use CONFIG_NUMA instead.Done with $ sed -i 's/CONFIG_NEED_MULTIPLE_NODES/CONFIG_NUMA/' \ $(git grep -wl CONFIG_NEED_MULTIPLE_NODES) $ sed -i 's/NEED_MULTIPLE_NODES/NUMA/' \ $(git grep -wl NEED_MULTIPLE_NODES)with manual tweaks afterwards.[rppt@linux.ibm.com: fix arm boot crash] Link: https://lkml.kernel.org/r/YMj9vHhHOiCVN4BF@linux.ibm.comLink: https://lkml.kernel.org/r/20210608091316.3622-9-rppt@kernel.orgSigned-off-by: Mike Rapoport Acked-by: Arnd Bergmann Acked-by: David Hildenbrand Cc: Geert Uytterhoeven Cc: Ivan Kokshaysky Cc: Jonathan Corbet Cc: Matt Turner Cc: Richard Henderson Cc: Vineet Gupta Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/arch/powerpc/mm/Makefile

1f9ad21c - powerpc/mm: Implement set_memory() routines

Wed, 09 Jun 2021 01:34:23 +0000

powerpc/mm: Implement set_memory() routinesThe set_memory_{ro/rw/nx/x}() functions are required forSTRICT_MODULE_RWX, and are generally useful primitives to have. Thisimplementation is designed to be generic across powerpc's many MMUs.It's possible that this could be optimised to be faster for specificMMUs.This implementation does not handle cases where the caller is attemptingto change the mapping of the page it is executing from, or if anotherCPU is concurrently using the page being altered. These cases likelyshouldn't happen, but a more complex implementation with MMU-specific codecould safely handle them.On hash, the linear mapping is not kept in the linux pagetable, so thiswill not change the protection if used on that range. Currently thesefunctions are not used on the linear map so just WARN for now.apply_to_existing_page_range() does not work on huge pages so for nowdisallow changing the protection of huge pages.[jpn: - Allow set memory functions to be used without Strict RWX - Hash: Disallow certain regions - Have change_page_attr() take function pointers to manipulate ptes - Radix: Add ptesync after set_pte_at()]Signed-off-by: Russell Currey Signed-off-by: Christophe Leroy Signed-off-by: Jordan Niethe Reviewed-by: Daniel Axtens Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210609013431.9805-2-jniethe5@gmail.com List of files: /linux-6.15/arch/powerpc/mm/Makefile

b26e8f27 - powerpc/mem: Move cache flushing functions into mm/cacheflush.c

Thu, 08 Apr 2021 15:30:24 +0000

powerpc/mem: Move cache flushing functions into mm/cacheflush.cCache flushing functions are in the middle of completelyunrelated stuff in mm/mem.cCreate a dedicated mm/cacheflush.c for those functions.Also cleanup the list of included headers.Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/7bf6f1600acad146e541a4e220940062f2e5b03d.1617895813.git.christophe.leroy@csgroup.eu List of files: /linux-6.15/arch/powerpc/mm/Makefile

5eedf9fe - powerpc/mm: Fix KUAP warning by providing copy_from_kernel_nofault_allowed()

Mon, 07 Dec 2020 16:58:01 +0000

powerpc/mm: Fix KUAP warning by providing copy_from_kernel_nofault_allowed()Since commit c33165253492 ("powerpc: use non-set_fs based maccessroutines"), userspace access is not granted anymore when usingcopy_from_kernel_nofault()However, kthread_probe_data() uses copy_from_kernel_nofault()to check validity of pointers. When the pointer is NULL,it points to userspace, leading to a KUAP fault and triggeringthe following big hammer warning many times when you requesta sysrq "show task":[ 1117.202054] ------------[ cut here ]------------[ 1117.202102] Bug: fault blocked by AP register ![ 1117.202261] WARNING: CPU: 0 PID: 377 at arch/powerpc/include/asm/nohash/32/kup-8xx.h:66 do_page_fault+0x4a8/0x5ec[ 1117.202310] Modules linked in:[ 1117.202428] CPU: 0 PID: 377 Comm: sh Tainted: G W 5.10.0-rc5-01340-g83f53be2de31-dirty #4175[ 1117.202499] NIP: c0012048 LR: c0012048 CTR: 00000000[ 1117.202573] REGS: cacdbb88 TRAP: 0700 Tainted: G W (5.10.0-rc5-01340-g83f53be2de31-dirty)[ 1117.202625] MSR: 00021032 CR: 24082222 XER: 20000000[ 1117.202899][ 1117.202899] GPR00: c0012048 cacdbc40 c2929290 00000023 c092e554 00000001 c09865e8 c092e640[ 1117.202899] GPR08: 00001032 00000000 00000000 00014efc 28082224 100d166a 100a0920 00000000[ 1117.202899] GPR16: 100cac0c 100b0000 1080c3fc 1080d685 100d0000 100d0000 00000000 100a0900[ 1117.202899] GPR24: 100d0000 c07892ec 00000000 c0921510 c21f4440 0000005c c0000000 cacdbc80[ 1117.204362] NIP [c0012048] do_page_fault+0x4a8/0x5ec[ 1117.204461] LR [c0012048] do_page_fault+0x4a8/0x5ec[ 1117.204509] Call Trace:[ 1117.204609] [cacdbc40] [c0012048] do_page_fault+0x4a8/0x5ec (unreliable)[ 1117.204771] [cacdbc70] [c00112f0] handle_page_fault+0x8/0x34[ 1117.204911] --- interrupt: 301 at copy_from_kernel_nofault+0x70/0x1c0[ 1117.204979] NIP: c010dbec LR: c010dbac CTR: 00000001[ 1117.205053] REGS: cacdbc80 TRAP: 0301 Tainted: G W (5.10.0-rc5-01340-g83f53be2de31-dirty)[ 1117.205104] MSR: 00009032 CR: 28082224 XER: 00000000[ 1117.205416] DAR: 0000005c DSISR: c0000000[ 1117.205416] GPR00: c0045948 cacdbd38 c2929290 00000001 00000017 00000017 00000027 0000000f[ 1117.205416] GPR08: c09926ec 00000000 00000000 3ffff000 24082224[ 1117.206106] NIP [c010dbec] copy_from_kernel_nofault+0x70/0x1c0[ 1117.206202] LR [c010dbac] copy_from_kernel_nofault+0x30/0x1c0[ 1117.206258] --- interrupt: 301[ 1117.206372] [cacdbd38] [c004bbb0] kthread_probe_data+0x44/0x70 (unreliable)[ 1117.206561] [cacdbd58] [c0045948] print_worker_info+0xe0/0x194[ 1117.206717] [cacdbdb8] [c00548ac] sched_show_task+0x134/0x168[ 1117.206851] [cacdbdd8] [c005a268] show_state_filter+0x70/0x100[ 1117.206989] [cacdbe08] [c039baa0] sysrq_handle_showstate+0x14/0x24[ 1117.207122] [cacdbe18] [c039bf18] __handle_sysrq+0xac/0x1d0[ 1117.207257] [cacdbe48] [c039c0c0] write_sysrq_trigger+0x4c/0x74[ 1117.207407] [cacdbe68] [c01fba48] proc_reg_write+0xb4/0x114[ 1117.207550] [cacdbe88] [c0179968] vfs_write+0x12c/0x478[ 1117.207686] [cacdbf08] [c0179e60] ksys_write+0x78/0x128[ 1117.207826] [cacdbf38] [c00110d0] ret_from_syscall+0x0/0x34[ 1117.207938] --- interrupt: c01 at 0xfd4e784[ 1117.208008] NIP: 0fd4e784 LR: 0fe0f244 CTR: 10048d38[ 1117.208083] REGS: cacdbf48 TRAP: 0c01 Tainted: G W (5.10.0-rc5-01340-g83f53be2de31-dirty)[ 1117.208134] MSR: 0000d032 CR: 44002222 XER: 00000000[ 1117.208470][ 1117.208470] GPR00: 00000004 7fc34090 77bfb4e0 00000001 1080fa40 00000002 7400000f fefefeff[ 1117.208470] GPR08: 7f7f7f7f 10048d38 1080c414 7fc343c0 00000000[ 1117.209104] NIP [0fd4e784] 0xfd4e784[ 1117.209180] LR [0fe0f244] 0xfe0f244[ 1117.209236] --- interrupt: c01[ 1117.209274] Instruction dump:[ 1117.209353] 714a4000 418200f0 73ca0001 40820084 73ca0032 408200f8 73c90040 4082ff60[ 1117.209727] 0fe00000 3c60c082 386399f4 48013b65 <0fe00000> 80010034 3860000b 7c0803a6[ 1117.210102] ---[ end trace 1927c0323393af3e ]---To avoid that, copy_from_kernel_nofault_allowed() is used to checkwhether the address is a valid kernel address. But the defaultversion of it returns true for any address.Provide a powerpc version of copy_from_kernel_nofault_allowed()that returns false when the address is below TASK_USER_MAX,so that copy_from_kernel_nofault() will return -ERANGE.Fixes: c33165253492 ("powerpc: use non-set_fs based maccess routines")Reported-by: Qian Cai Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/18bcb456d32a3e74f5ae241fd6f1580c092d07f5.1607360230.git.christophe.leroy@csgroup.eu List of files: /linux-6.15/arch/powerpc/mm/Makefile

47da42b2 - powerpc/mm/highmem: Switch to generic kmap atomic

Tue, 03 Nov 2020 09:27:27 +0000

powerpc/mm/highmem: Switch to generic kmap atomicNo reason having the same code in every architectureSigned-off-by: Thomas Gleixner Cc: Michael Ellerman Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Arnd Bergmann Link: https://lore.kernel.org/r/20201103095858.087635810@linutronix.de List of files: /linux-6.15/arch/powerpc/mm/Makefile

f381d571 - powerpc/mm: Move ioremap functions out of pgtable_32/64.c

Tue, 20 Aug 2019 14:07:17 +0000

powerpc/mm: Move ioremap functions out of pgtable_32/64.cCreate ioremap_32.c and ioremap_64.c and move respective ioremapfunctions out of pgtable_32.c and pgtable_64.cIn the meantime, fix a few comments and changes a printk() topr_warn(). Also fix a few oversplitted lines.Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/b5c8b02ccefd4ede64c61b53cf64fb5dacb35740.1566309263.git.christophe.leroy@c-s.fr List of files: /linux-6.15/arch/powerpc/mm/Makefile

4634c375 - powerpc/mm: move common 32/64 bits ioremap functions into ioremap.c

Tue, 20 Aug 2019 14:07:14 +0000

powerpc/mm: move common 32/64 bits ioremap functions into ioremap.cioremap(), ioremap_wc() and ioremap_coherent() are now identical onPPC32 and PPC64 as iowa_is_active() will always return false onPPC32. Move them into a new common location called ioremap.cSigned-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/6223803ce024d6ab4dfaa919f44098aed5b4bc33.1566309262.git.christophe.leroy@c-s.fr List of files: /linux-6.15/arch/powerpc/mm/Makefile

c4e31847 - powerpc/mm: fix redundant inclusion of pgtable-frag.o in Makefile

Mon, 06 May 2019 06:47:55 +0000

powerpc/mm: fix redundant inclusion of pgtable-frag.o in MakefileThe patch identified below added pgtable-frag.o to obj-ybut some merge witchery kept it also for obj-CONFIG_PPC_BOOK3S_64This patch clears the duplication.Fixes: 737b434d3d55 ("powerpc/mm: convert Book3E 64 to pte_fragment")Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman List of files: /linux-6.15/arch/powerpc/mm/Makefile

471e475c - powerpc/mm: Fix makefile for KASAN

Mon, 06 May 2019 06:21:01 +0000

powerpc/mm: Fix makefile for KASANIn commit 17312f258cf6 ("powerpc/mm: Move book3s32 specifics insubdirectory mm/book3s64"), ppc_mmu_32.c was moved and renamed.This patch fixes Makefiles to disable KASAN instrumentation onthe new name and location.Fixes: f072015c7b74 ("powerpc: disable KASAN instrumentation on early/critical files.")Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman List of files: /linux-6.15/arch/powerpc/mm/Makefile

2edb16ef - powerpc/32: Add KASAN support

Fri, 26 Apr 2019 16:23:34 +0000

powerpc/32: Add KASAN supportThis patch adds KASAN support for PPC32. The following patchwill add an early activation of hash table for book3s. Untilthen, a warning will be raised if trying to use KASAN on anhash 6xx.To support KASAN, this patch initialises that MMU mapings foraccessing to the KASAN shadow area defined in a previous patch.An early mapping is set as soon as the kernel code has beenrelocated at its definitive place.Then the definitive mapping is set once paging is initialised.For modules, the shadow area is allocated at module_alloc().Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman List of files: /linux-6.15/arch/powerpc/mm/Makefile

f072015c - powerpc: disable KASAN instrumentation on early/critical files.

Fri, 26 Apr 2019 16:23:33 +0000

powerpc: disable KASAN instrumentation on early/critical files.All files containing functions run before kasan_early_init() is calledmust have KASAN instrumentation disabled.For those file, branch profiling also have to be disabled otherwiseeach if () generates a call to ftrace_likely_update().Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman List of files: /linux-6.15/arch/powerpc/mm/Makefile

737b434d - powerpc/mm: convert Book3E 64 to pte_fragment

Fri, 26 Apr 2019 15:58:01 +0000

powerpc/mm: convert Book3E 64 to pte_fragmentBook3E 64 is the only subarch not using pte_fragment. In orderto allow refactorisation, this patch converts it to pte_fragment.Reviewed-by: Aneesh Kumar K.V Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman List of files: /linux-6.15/arch/powerpc/mm/Makefile

b7dcf96c - powerpc/mm: make hugetlbpage.c depend on CONFIG_HUGETLB_PAGE

Fri, 26 Apr 2019 05:59:42 +0000

powerpc/mm: make hugetlbpage.c depend on CONFIG_HUGETLB_PAGEThe only function in hugetlbpage.c which doesn't depend onCONFIG_HUGETLB_PAGE is gup_hugepte(), and this function isonly called from gup_huge_pd() which depends onCONFIG_HUGETLB_PAGE so all the content of hugetlbpage.cdepends on CONFIG_HUGETLB_PAGE.This patch modifies Makefile to only compile hugetlbpage.cwhen CONFIG_HUGETLB_PAGE is set.Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman List of files: /linux-6.15/arch/powerpc/mm/Makefile

27e23b5f - powerpc/mm: Move nohash specifics in subdirectory mm/nohash

Fri, 29 Mar 2019 10:00:02 +0000

powerpc/mm: Move nohash specifics in subdirectory mm/nohashMany files in arch/powerpc/mm are only for nohash. This patchcreates a subdirectory for them.Signed-off-by: Christophe Leroy [mpe: Shorten new filenames]Signed-off-by: Michael Ellerman List of files: /linux-6.15/arch/powerpc/mm/Makefile

17312f25 - powerpc/mm: Move book3s32 specifics in subdirectory mm/book3s64

Fri, 29 Mar 2019 10:00:01 +0000

powerpc/mm: Move book3s32 specifics in subdirectory mm/book3s64Several files in arch/powerpc/mm are only for book3S32. This patchcreates a subdirectory for them.Signed-off-by: Christophe Leroy [mpe: Shorten new filenames]Signed-off-by: Michael Ellerman List of files: /linux-6.15/arch/powerpc/mm/Makefile