pm24.git/arch/powerpc/mm, branch master

Merge tag 'powerpc-6.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

2024-11-23T18:44:31Z

Pull powerpc updates from Michael Ellerman: - Rework kfence support for the HPT MMU to work on systems with >= 16TB of RAM. - Remove the powerpc "maple" platform, used by the "Yellow Dog Powerstation". - Add support for DYNAMIC_FTRACE_WITH_CALL_OPS, DYNAMIC_FTRACE_WITH_DIRECT_CALLS & BPF Trampolines. - Add support for running KVM nested guests on Power11. - Other small features, cleanups and fixes. Thanks to Amit Machhiwal, Arnd Bergmann, Christophe Leroy, Costa Shulyupin, David Hunter, David Wang, Disha Goel, Gautam Menghani, Geert Uytterhoeven, Hari Bathini, Julia Lawall, Kajol Jain, Keith Packard, Lukas Bulwahn, Madhavan Srinivasan, Markus Elfring, Michal Suchanek, Ming Lei, Mukesh Kumar Chaurasiya, Nathan Chancellor, Naveen N Rao, Nicholas Piggin, Nysal Jan K.A, Paulo Miguel Almeida, Pavithra Prakash, Ritesh Harjani (IBM), Rob Herring (Arm), Sachin P Bappalige, Shen Lichuan, Simon Horman, Sourabh Jain, Thomas Weißschuh, Thorsten Blum, Thorsten Leemhuis, Venkat Rao Bagalkote, Zhang Zekun, and zhang jiao. * tag 'powerpc-6.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (89 commits) EDAC/powerpc: Remove PPC_MAPLE drivers powerpc/perf: Add per-task/process monitoring to vpa_pmu driver powerpc/kvm: Add vpa latency counters to kvm_vcpu_arch docs: ABI: sysfs-bus-event_source-devices-vpa-pmu: Document sysfs event format entries for vpa_pmu powerpc/perf: Add perf interface to expose vpa counters MAINTAINERS: powerpc: Mark Maddy as "M" powerpc/Makefile: Allow overriding CPP powerpc-km82xx.c: replace of_node_put() with __free ps3: Correct some typos in comments powerpc/kexec: Fix return of uninitialized variable macintosh: Use common error handling code in via_pmu_led_init() powerpc/powermac: Use of_property_match_string() in pmac_has_backlight_type() powerpc: remove dead config options for MPC85xx platform support powerpc/xive: Use cpumask_intersects() selftests/powerpc: Remove the path after initialization. powerpc/xmon: symbol lookup length fixed powerpc/ep8248e: Use %pa to format resource_size_t powerpc/ps3: Reorganize kerneldoc parameter names KVM: PPC: Book3S HV: Fix kmv -> kvm typo powerpc/sstep: make emulate_vsx_load and emulate_vsx_store static ...

asm-generic: introduce text-patching.h

2024-11-07T22:25:15Z

Several architectures support text patching, but they name the header files that declare patching functions differently. Make all such headers consistently named text-patching.h and add an empty header in asm-generic for architectures that do not support text patching. Link: https://lkml.kernel.org/r/20241023162711.2579610-4-rppt@kernel.org Signed-off-by: Mike Rapoport (Microsoft) Reviewed-by: Christoph Hellwig Acked-by: Geert Uytterhoeven # m68k Acked-by: Arnd Bergmann Reviewed-by: Luis Chamberlain Tested-by: kdevops Cc: Andreas Larsson Cc: Andy Lutomirski Cc: Ard Biesheuvel Cc: Borislav Petkov (AMD) Cc: Brian Cain Cc: Catalin Marinas Cc: Christophe Leroy Cc: Dave Hansen Cc: Dinh Nguyen Cc: Guo Ren Cc: Helge Deller Cc: Huacai Chen Cc: Ingo Molnar Cc: Johannes Berg Cc: John Paul Adrian Glaubitz Cc: Kent Overstreet Cc: Liam R. Howlett Cc: Mark Rutland Cc: Masami Hiramatsu (Google) Cc: Matt Turner Cc: Max Filippov Cc: Michael Ellerman Cc: Michal Simek Cc: Oleg Nesterov Cc: Palmer Dabbelt Cc: Peter Zijlstra Cc: Richard Weinberger Cc: Russell King Cc: Song Liu Cc: Stafford Horne Cc: Steven Rostedt (Google) Cc: Suren Baghdasaryan Cc: Thomas Bogendoerfer Cc: Thomas Gleixner Cc: Uladzislau Rezki (Sony) Cc: Vineet Gupta Cc: Will Deacon Signed-off-by: Andrew Morton

mm: drop hugetlb_get_unmapped_area{_*} functions

2024-11-07T04:11:10Z

Hugetlb mappings are now handled through normal channels just like any other mapping, so we no longer need hugetlb_get_unmapped_area* specific functions. Link: https://lkml.kernel.org/r/20241007075037.267650-8-osalvador@suse.de Signed-off-by: Oscar Salvador Cc: David Hildenbrand Cc: Donet Tom Cc: Lorenzo Stoakes Cc: Michal Hocko Cc: Muchun Song Cc: Peter Xu Cc: Vlastimil Babka Signed-off-by: Andrew Morton

arch/powerpc: teach book3s64 arch_get_unmapped_area{_topdown} to handle hugetlb mappings

2024-11-07T04:11:10Z

We want to stop special casing hugetlb mappings and make them go through generic channels, so teach arch_get_unmapped_area{_topdown} to handle those. Reshuffle file_to_psize() definition so arch_get_unmapped_area{_topdown} can make use of it. Link: https://lkml.kernel.org/r/20241007075037.267650-6-osalvador@suse.de Signed-off-by: Oscar Salvador Cc: David Hildenbrand Cc: Donet Tom Cc: Lorenzo Stoakes Cc: Michal Hocko Cc: Muchun Song Cc: Peter Xu Cc: Vlastimil Babka Signed-off-by: Andrew Morton

powerpc: assert_pte_locked() use pte_offset_map_ro_nolock()

2024-11-06T00:56:26Z

In assert_pte_locked(), we just get the ptl and assert if it was already held, so convert it to using pte_offset_map_ro_nolock(). Link: https://lkml.kernel.org/r/42559e042eb6fc3129a40f710d671712030646b4.1727332572.git.zhengqi.arch@bytedance.com Signed-off-by: Qi Zheng Acked-by: David Hildenbrand Reviewed-by: Muchun Song Cc: Hugh Dickins Cc: Matthew Wilcox Cc: Mike Rapoport (Microsoft) Cc: Peter Xu Cc: Ryan Roberts Cc: Vishal Moola (Oracle) Signed-off-by: Andrew Morton

book3s64/hash: Early detect debug_pagealloc size requirement

2024-10-23T07:53:20Z

Add hash_supports_debug_pagealloc() helper to detect whether debug_pagealloc can be supported on hash or not. This checks for both, whether debug_pagealloc config is enabled and the linear map should fit within rma_size/4 region size. This can then be used early during htab_init_page_sizes() to decide linear map pagesize if hash supports either debug_pagealloc or kfence. Signed-off-by: Ritesh Harjani (IBM) Signed-off-by: Michael Ellerman Link: https://patch.msgid.link/c33c6691b2a2cf619cc74ac100118ca4dbf21a48.1729271995.git.ritesh.list@gmail.com

book3s64/hash: Disable kfence if not early init

2024-10-23T07:53:20Z

Enable kfence on book3s64 hash only when early init is enabled. This is because, kfence could cause the kernel linear map to be mapped at PAGE_SIZE level instead of 16M (which I guess we don't want). Also currently there is no way to - 1. Make multiple page size entries for the SLB used for kernel linear map. 2. No easy way of getting the hash slot details after the page table mapping for kernel linear setup. So even if kfence allocate the pool in late init, we won't be able to get the hash slot details in kfence linear map. Thus this patch disables kfence on hash if kfence early init is not enabled. Signed-off-by: Ritesh Harjani (IBM) Signed-off-by: Michael Ellerman Link: https://patch.msgid.link/4a6eea8cfd1cd28fccfae067026bff30cbec1d4b.1729271995.git.ritesh.list@gmail.com

book3s64/radix: Refactoring common kfence related functions

2024-10-23T07:53:20Z

Both radix and hash on book3s requires to detect if kfence early init is enabled or not. Hash needs to disable kfence if early init is not enabled because with kfence the linear map is mapped using PAGE_SIZE rather than 16M mapping. We don't support multiple page sizes for slb entry used for kernel linear map in book3s64. This patch refactors out the common functions required to detect kfence early init is enabled or not. Signed-off-by: Ritesh Harjani (IBM) Signed-off-by: Michael Ellerman Link: https://patch.msgid.link/f4a787224fbe5bb787158ace579780c0257f6602.1729271995.git.ritesh.list@gmail.com

book3s64/hash: Add kfence functionality

2024-10-23T07:53:20Z

Now that linear map functionality of debug_pagealloc is made generic, enable kfence to use this generic infrastructure. 1. Define kfence related linear map variables. - u8 *linear_map_kf_hash_slots; - unsigned long linear_map_kf_hash_count; - DEFINE_RAW_SPINLOCK(linear_map_kf_hash_lock); 2. The linear map size allocated in RMA region is quite small (KFENCE_POOL_SIZE >> PAGE_SHIFT) which is 512 bytes by default. 3. kfence pool memory is reserved using memblock_phys_alloc() which has can come from anywhere. (default 255 objects => ((1+255) * 2) << PAGE_SHIFT = 32MB) 4. The hash slot information for kfence memory gets added in linear map in hash_linear_map_add_slot() (which also adds for debug_pagealloc). Reported-by: Pavithra Prakash Signed-off-by: Ritesh Harjani (IBM) Signed-off-by: Michael Ellerman Link: https://patch.msgid.link/5c2b61941b344077a2b8654dab46efa0322af3af.1729271995.git.ritesh.list@gmail.com

book3s64/hash: Disable debug_pagealloc if it requires more memory

2024-10-23T07:53:19Z

Make size of the linear map to be allocated in RMA region to be of ppc64_rma_size / 4. If debug_pagealloc requires more memory than that then do not allocate any memory and disable debug_pagealloc. Signed-off-by: Ritesh Harjani (IBM) Signed-off-by: Michael Ellerman Link: https://patch.msgid.link/e1ef66f32a1fe63bcbb89d5c11d86c65beef5ded.1729271995.git.ritesh.list@gmail.com