pm24.git/arch/powerpc/include/asm/nohash/32, branch master

Merge tag 'powerpc-6.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

2024-09-19T06:03:00Z

Pull powerpc updates from Michael Ellerman: - Reduce alignment constraints on STRICT_KERNEL_RWX and speed-up TLB misses on 8xx and 603 - Replace kretprobe code with rethook and enable fprobe - Remove the "fast endian switch" syscall - Handle DLPAR device tree updates in kernel, allowing the deprecation of the binary /proc/powerpc/ofdt interface Thanks to Abhishek Dubey, Alex Shi, Benjamin Gray, Christophe Leroy, Gaosheng Cui, Gautam Menghani, Geert Uytterhoeven, Haren Myneni, Hari Bathini, Huang Xiaojia, Jinjie Ruan, Madhavan Srinivasan, Miguel Ojeda, Mina Almasry, Narayana Murty N, Naveen Rao, Rob Herring (Arm), Scott Cheloha, Segher Boessenkool, Stephen Rothwell, Thomas Zimmermann, Uwe Kleine-König, Vaibhav Jain, and Zhang Zekun. * tag 'powerpc-6.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (59 commits) powerpc/atomic: Use YZ constraints for DS-form instructions MAINTAINERS: powerpc: Add Maddy powerpc: Switch back to struct platform_driver::remove() powerpc/pseries/eeh: Fix pseries_eeh_err_inject selftests/powerpc: Allow building without static libc macintosh/via-pmu: register_pmu_pm_ops() can be __init powerpc: Stop using no_llseek powerpc/64s: Remove the "fast endian switch" syscall powerpc/mm/64s: Restrict THP to Radix or HPT w/64K pages powerpc/mm/64s: Move THP reqs into a separate symbol powerpc/64s: Make mmu_hash_ops __ro_after_init powerpc: Replace kretprobe code with rethook on powerpc powerpc: pseries: Constify struct kobj_type powerpc: powernv: Constify struct kobj_type powerpc: Constify struct kobj_type powerpc/pseries/dlpar: Add device tree nodes for DLPAR IO add powerpc/pseries/dlpar: Remove device tree node for DLPAR IO remove powerpc/pseries: Use correct data types from pseries_hp_errorlog struct powerpc/vdso: Inconditionally use CFUNC macro powerpc/32: Implement validation of emergency stack ...

powerpc/8xx: Reduce default size of module/execmem area

2024-08-30T11:29:53Z

8xx boards don't have much memory, the two I know have respectively 32Mbytes and 128Mbytes, so there is no point in having 256 Mbytes of memory for module text. Reduce it to 32Mbytes for 8xx, that's more than enough. Nevertheless, make it a configurable value so that it can be customised if needed. Also add a build verification for overlap of module execmem space with user PMD. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://msgid.link/8db23b61e33a0d1913d814f94bfe71ba7ac78b0f.1724173828.git.christophe.leroy@csgroup.eu

powerpc/mm: Fix return type of pgd_val()

2024-08-22T12:52:38Z

Commit 6b0e82791bd0 ("powerpc/e500: switch to 64 bits PGD on 85xx (32 bits)") switched PGD entries to 64 bits, but pgd_val() returns an unsigned long which is 32 bits on PPC32. This is not a problem for regular PMD entries because the upper part is always NULL, but when PMD entries are leaf they contain 64 bits values, so pgd_val() must return an unsigned long long instead of an unsigned long. Also change the condition to CONFIG_PPC_85xx instead of CONFIG_PPC_E500 as the change was meant for 32 bits only. Allthough this should be harmless on PPC64, it generates a warning with pgd_ERROR print. Fixes: 6b0e82791bd0 ("powerpc/e500: switch to 64 bits PGD on 85xx (32 bits)") Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://msgid.link/45f8fdf298ec3df7573b66d21b03a5cda92e2cb1.1724313510.git.christophe.leroy@csgroup.eu

Merge tag 'mm-stable-2024-07-21-14-50' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2024-07-22T00:15:46Z

Pull MM updates from Andrew Morton: - In the series "mm: Avoid possible overflows in dirty throttling" Jan Kara addresses a couple of issues in the writeback throttling code. These fixes are also targetted at -stable kernels. - Ryusuke Konishi's series "nilfs2: fix potential issues related to reserved inodes" does that. This should actually be in the mm-nonmm-stable tree, along with the many other nilfs2 patches. My bad. - More folio conversions from Kefeng Wang in the series "mm: convert to folio_alloc_mpol()" - Kemeng Shi has sent some cleanups to the writeback code in the series "Add helper functions to remove repeated code and improve readability of cgroup writeback" - Kairui Song has made the swap code a little smaller and a little faster in the series "mm/swap: clean up and optimize swap cache index". - In the series "mm/memory: cleanly support zeropage in vm_insert_page*(), vm_map_pages*() and vmf_insert_mixed()" David Hildenbrand has reworked the rather sketchy handling of the use of the zeropage in MAP_SHARED mappings. I don't see any runtime effects here - more a cleanup/understandability/maintainablity thing. - Dev Jain has improved selftests/mm/va_high_addr_switch.c's handling of higher addresses, for aarch64. The (poorly named) series is "Restructure va_high_addr_switch". - The core TLB handling code gets some cleanups and possible slight optimizations in Bang Li's series "Add update_mmu_tlb_range() to simplify code". - Jane Chu has improved the handling of our fake-an-unrecoverable-memory-error testing feature MADV_HWPOISON in the series "Enhance soft hwpoison handling and injection". - Jeff Johnson has sent a billion patches everywhere to add MODULE_DESCRIPTION() to everything. Some landed in this pull. - In the series "mm: cleanup MIGRATE_SYNC_NO_COPY mode", Kefeng Wang has simplified migration's use of hardware-offload memory copying. - Yosry Ahmed performs more folio API conversions in his series "mm: zswap: trivial folio conversions". - In the series "large folios swap-in: handle refault cases first", Chuanhua Han inches us forward in the handling of large pages in the swap code. This is a cleanup and optimization, working toward the end objective of full support of large folio swapin/out. - In the series "mm,swap: cleanup VMA based swap readahead window calculation", Huang Ying has contributed some cleanups and a possible fixlet to his VMA based swap readahead code. - In the series "add mTHP support for anonymous shmem" Baolin Wang has taught anonymous shmem mappings to use multisize THP. By default this is a no-op - users must opt in vis sysfs controls. Dramatic improvements in pagefault latency are realized. - David Hildenbrand has some cleanups to our remaining use of page_mapcount() in the series "fs/proc: move page_mapcount() to fs/proc/internal.h". - David also has some highmem accounting cleanups in the series "mm/highmem: don't track highmem pages manually". - Build-time fixes and cleanups from John Hubbard in the series "cleanups, fixes, and progress towards avoiding "make headers"". - Cleanups and consolidation of the core pagemap handling from Barry Song in the series "mm: introduce pmd|pte_needs_soft_dirty_wp helpers and utilize them". - Lance Yang's series "Reclaim lazyfree THP without splitting" has reduced the latency of the reclaim of pmd-mapped THPs under fairly common circumstances. A 10x speedup is seen in a microbenchmark. It does this by punting to aother CPU but I guess that's a win unless all CPUs are pegged. - hugetlb_cgroup cleanups from Xiu Jianfeng in the series "mm/hugetlb_cgroup: rework on cftypes". - Miaohe Lin's series "Some cleanups for memory-failure" does just that thing. - Someone other than SeongJae has developed a DAMON feature in Honggyu Kim's series "DAMON based tiered memory management for CXL memory". This adds DAMON features which may be used to help determine the efficiency of our placement of CXL/PCIe attached DRAM. - DAMON user API centralization and simplificatio work in SeongJae Park's series "mm/damon: introduce DAMON parameters online commit function". - In the series "mm: page_type, zsmalloc and page_mapcount_reset()" David Hildenbrand does some maintenance work on zsmalloc - partially modernizing its use of pageframe fields. - Kefeng Wang provides more folio conversions in the series "mm: remove page_maybe_dma_pinned() and page_mkclean()". - More cleanup from David Hildenbrand, this time in the series "mm/memory_hotplug: use PageOffline() instead of PageReserved() for !ZONE_DEVICE". It "enlightens memory hotplug more about PageOffline() pages" and permits the removal of some virtio-mem hacks. - Barry Song's series "mm: clarify folio_add_new_anon_rmap() and __folio_add_anon_rmap()" is a cleanup to the anon folio handling in preparation for mTHP (multisize THP) swapin. - Kefeng Wang's series "mm: improve clear and copy user folio" implements more folio conversions, this time in the area of large folio userspace copying. - The series "Docs/mm/damon/maintaier-profile: document a mailing tool and community meetup series" tells people how to get better involved with other DAMON developers. From SeongJae Park. - A large series ("kmsan: Enable on s390") from Ilya Leoshkevich does that. - David Hildenbrand sends along more cleanups, this time against the migration code. The series is "mm/migrate: move NUMA hinting fault folio isolation + checks under PTL". - Jan Kara has found quite a lot of strangenesses and minor errors in the readahead code. He addresses this in the series "mm: Fix various readahead quirks". - SeongJae Park's series "selftests/damon: test DAMOS tried regions and {min,max}_nr_regions" adds features and addresses errors in DAMON's self testing code. - Gavin Shan has found a userspace-triggerable WARN in the pagecache code. The series "mm/filemap: Limit page cache size to that supported by xarray" addresses this. The series is marked cc:stable. - Chengming Zhou's series "mm/ksm: cmp_and_merge_page() optimizations and cleanup" cleans up and slightly optimizes KSM. - Roman Gushchin has separated the memcg-v1 and memcg-v2 code - lots of code motion. The series (which also makes the memcg-v1 code Kconfigurable) are "mm: memcg: separate legacy cgroup v1 code and put under config option" and "mm: memcg: put cgroup v1-specific memcg data under CONFIG_MEMCG_V1" - Dan Schatzberg's series "Add swappiness argument to memory.reclaim" adds an additional feature to this cgroup-v2 control file. - The series "Userspace controls soft-offline pages" from Jiaqi Yan permits userspace to stop the kernel's automatic treatment of excessive correctable memory errors. In order to permit userspace to monitor and handle this situation. - Kefeng Wang's series "mm: migrate: support poison recover from migrate folio" teaches the kernel to appropriately handle migration from poisoned source folios rather than simply panicing. - SeongJae Park's series "Docs/damon: minor fixups and improvements" does those things. - In the series "mm/zsmalloc: change back to per-size_class lock" Chengming Zhou improves zsmalloc's scalability and memory utilization. - Vivek Kasireddy's series "mm/gup: Introduce memfd_pin_folios() for pinning memfd folios" makes the GUP code use FOLL_PIN rather than bare refcount increments. So these paes can first be moved aside if they reside in the movable zone or a CMA block. - Andrii Nakryiko has added a binary ioctl()-based API to /proc/pid/maps for much faster reading of vma information. The series is "query VMAs from /proc//maps". - In the series "mm: introduce per-order mTHP split counters" Lance Yang improves the kernel's presentation of developer information related to multisize THP splitting. - Michael Ellerman has developed the series "Reimplement huge pages without hugepd on powerpc (8xx, e500, book3s/64)". This permits userspace to use all available huge page sizes. - In the series "revert unconditional slab and page allocator fault injection calls" Vlastimil Babka removes a performance-affecting and not very useful feature from slab fault injection. * tag 'mm-stable-2024-07-21-14-50' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (411 commits) mm/mglru: fix ineffective protection calculation mm/zswap: fix a white space issue mm/hugetlb: fix kernel NULL pointer dereference when migrating hugetlb folio mm/hugetlb: fix possible recursive locking detected warning mm/gup: clear the LRU flag of a page before adding to LRU batch mm/numa_balancing: teach mpol_to_str about the balancing mode mm: memcg1: convert charge move flags to unsigned long long alloc_tag: fix page_ext_get/page_ext_put sequence during page splitting lib: reuse page_ext_data() to obtain codetag_ref lib: add missing newline character in the warning message mm/mglru: fix overshooting shrinker memory mm/mglru: fix div-by-zero in vmpressure_calc_level() mm/kmemleak: replace strncpy() with strscpy() mm, page_alloc: put should_fail_alloc_page() back behing CONFIG_FAIL_PAGE_ALLOC mm, slab: put should_failslab() back behind CONFIG_SHOULD_FAILSLAB mm: ignore data-race in __swap_writepage hugetlbfs: ensure generic_hugetlb_get_unmapped_area() returns higher address than mmap_min_addr mm: shmem: rename mTHP shmem counters mm: swap_state: use folio_alloc_mpol() in __read_swap_cache_async() mm/migrate: putback split folios when numa hint migration fails ...

powerpc/8xx: simplify struct mmu_psize_def

2024-07-12T22:52:17Z

On 8xx, only the shift field is used in struct mmu_psize_def Remove other fields and related macros. Link: https://lkml.kernel.org/r/dd0587a9e8354005858c7f8c9a775ad05523b314.1719928057.git.christophe.leroy@csgroup.eu Signed-off-by: Christophe Leroy Reviewed-by: Oscar Salvador Cc: Jason Gunthorpe Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Peter Xu Signed-off-by: Andrew Morton

powerpc/8xx: rework support for 8M pages using contiguous PTE entries

2024-07-12T22:52:17Z

In order to fit better with standard Linux page tables layout, add support for 8M pages using contiguous PTE entries in a standard page table. Page tables will then be populated with 1024 similar entries and two PMD entries will point to that page table. The PMD entries also get a flag to tell it is addressing an 8M page, this is required for the HW tablewalk assistance. Link: https://lkml.kernel.org/r/8693d9a0408371043ca63bf9e4a9c140667af63e.1719928057.git.christophe.leroy@csgroup.eu Signed-off-by: Christophe Leroy Reviewed-by: Oscar Salvador Cc: Jason Gunthorpe Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Peter Xu Signed-off-by: Andrew Morton

powerpc/mm: remove _PAGE_PSIZE

2024-07-12T22:52:16Z

_PAGE_PSIZE macro is never used outside the place it is defined and is used only on 8xx and e500. Remove indirection, remove it and use its content directly. Link: https://lkml.kernel.org/r/c41da3b0ceda7311a50f0391cc4d54302ae15b74.1719928057.git.christophe.leroy@csgroup.eu Signed-off-by: Christophe Leroy Reviewed-by: Oscar Salvador Cc: Jason Gunthorpe Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Peter Xu Signed-off-by: Andrew Morton

powerpc: Remove core support for 40x

2024-06-28T12:28:47Z

Now that 40x platforms have gone, remove support for 40x in the core of powerpc arch. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://msgid.link/20240628121201.130802-4-mpe@ellerman.id.au

Merge tag 'powerpc-6.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

2023-11-03T20:07:39Z

Pull powerpc updates from Michael Ellerman: - Add support for KVM running as a nested hypervisor under development versions of PowerVM, using the new PAPR nested virtualisation API - Add support for the BPF prog pack allocator - A rework of the non-server MMU handling to support execute-only on all platforms - Some optimisations & cleanups for the powerpc qspinlock code - Various other small features and fixes Thanks to Aboorva Devarajan, Aditya Gupta, Amit Machhiwal, Benjamin Gray, Christophe Leroy, Dr. David Alan Gilbert, Gaurav Batra, Gautam Menghani, Geert Uytterhoeven, Haren Myneni, Hari Bathini, Joel Stanley, Jordan Niethe, Julia Lawall, Kautuk Consul, Kuan-Wei Chiu, Michael Neuling, Minjie Du, Muhammad Muzammil, Naveen N Rao, Nicholas Piggin, Nick Child, Nysal Jan K.A, Peter Lafreniere, Rob Herring, Sachin Sant, Sebastian Andrzej Siewior, Shrikanth Hegde, Srikar Dronamraju, Stanislav Kinsburskii, Vaibhav Jain, Wang Yufen, Yang Yingliang, and Yuan Tan. * tag 'powerpc-6.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (100 commits) powerpc/vmcore: Add MMU information to vmcoreinfo Revert "powerpc: add `cur_cpu_spec` symbol to vmcoreinfo" powerpc/bpf: use bpf_jit_binary_pack_[alloc|finalize|free] powerpc/bpf: rename powerpc64_jit_data to powerpc_jit_data powerpc/bpf: implement bpf_arch_text_invalidate for bpf_prog_pack powerpc/bpf: implement bpf_arch_text_copy powerpc/code-patching: introduce patch_instructions() powerpc/32s: Implement local_flush_tlb_page_psize() powerpc/pseries: use kfree_sensitive() in plpks_gen_password() powerpc/code-patching: Perform hwsync in __patch_instruction() in case of failure powerpc/fsl_msi: Use device_get_match_data() powerpc: Remove cpm_dp...() macros powerpc/qspinlock: Rename yield_propagate_owner tunable powerpc/qspinlock: Propagate sleepy if previous waiter is preempted powerpc/qspinlock: don't propagate the not-sleepy state powerpc/qspinlock: propagate owner preemptedness rather than CPU number powerpc/qspinlock: stop queued waiters trying to set lock sleepy powerpc/perf: Fix disabling BHRB and instruction sampling powerpc/trace: Add support for HAVE_FUNCTION_ARG_ACCESS_API powerpc/tools: Pass -mabi=elfv2 to gcc-check-mprofile-kernel.sh ...

powerpc: Support execute-only on all powerpc

2023-10-19T06:12:47Z

Introduce PAGE_EXECONLY_X macro which provides exec-only rights. The _X may be seen as redundant with the EXECONLY but it helps keep consistency, all macros having the EXEC right have _X. And put it next to PAGE_NONE as PAGE_EXECONLY_X is somehow PAGE_NONE + EXEC just like all other SOMETHING_X are just SOMETHING + EXEC. On book3s/64 PAGE_EXECONLY becomes PAGE_READONLY_X. On book3s/64, as PAGE_EXECONLY is only valid for Radix add VM_READ flag in vm_get_page_prot() for non-Radix. And update access_error() so that a non exec fault on a VM_EXEC only mapping is always invalid, even when the underlying layer don't always generate a fault for that. For 8xx, set PAGE_EXECONLY_X as _PAGE_NA | _PAGE_EXEC. For others, only set it as just _PAGE_EXEC With that change, 8xx, e500 and 44x fully honor execute-only protection. On 40x that is a partial implementation of execute-only. The implementation won't be complete because once a TLB has been loaded via the Instruction TLB miss handler, it will be possible to read the page. But at least it can't be read unless it is executed first. On 603 MMU, TLB missed are handled by SW and there are separate DTLB and ITLB. Execute-only is therefore now supported by not loading DTLB when read access is not permitted. On hash (604) MMU it is more tricky because hash table is common to load/store and execute. Nevertheless it is still possible to check whether _PAGE_READ is set before loading hash table for a load/store access. At least it can't be read unless it is executed first. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://msgid.link/4283ea9cbef9ff2fbee468904800e1962bc8fc18.1695659959.git.christophe.leroy@csgroup.eu