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2023-05-29mem profiling: Runtime switchmemalloc_prof_v1Kent Overstreet
This converts the boot switch to a sysctl, which can be changed at runtime when CONFIG_MEM_ALLOC_PROFILING_DEBUG=n Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-05-29lib/string_helpers: Add flags param to string_get_size()Kent Overstreet
The new flags parameter allows controlling - Whether or not the units suffix is separated by a space, for compatibility with sort -h - Whether or not to append a B suffix - we're not always printing bytes. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-05-11alloc_hooks: Bit more reformattingKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-05-11alloc_hooks cleanup: use __VA_ARGS__Kent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-05-11Slim down alloc_hooksKent Overstreet
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-04-30MAINTAINERS: Add entries for code tagging and memory allocation profilingKent Overstreet
The new code & libraries added are being maintained - mark them as such. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30codetag: debug: introduce OBJEXTS_ALLOC_FAIL to mark failed slab_ext allocationsSuren Baghdasaryan
If slabobj_ext vector allocation for a slab object fails and later on it succeeds for another object in the same slab, the slabobj_ext for the original object will be NULL and will be flagged in case when CONFIG_MEM_ALLOC_PROFILING_DEBUG is enabled. Mark failed slabobj_ext vector allocations using a new objext_flags flag stored in the lower bits of slab->obj_exts. When new allocation succeeds it marks all tag references in the same slabobj_ext vector as empty to avoid warnings implemented by CONFIG_MEM_ALLOC_PROFILING_DEBUG checks. Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30codetag: debug: mark codetags for reserved pages as emptySuren Baghdasaryan
To avoid debug warnings while freeing reserved pages which were not allocated with usual allocators, mark their codetags as empty before freeing. Maybe we can annotate reserved pages correctly and avoid this? Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30codetag: debug: skip objext checking when it's for objext itselfSuren Baghdasaryan
objext objects are created with __GFP_NO_OBJ_EXT flag and therefore have no corresponding objext themselves (otherwise we would get an infinite recursion). When freeing these objects their codetag will be empty and when CONFIG_MEM_ALLOC_PROFILING_DEBUG is enabled this will lead to false warnings. Introduce CODETAG_EMPTY special codetag value to mark allocations which intentionally lack codetag to avoid these warnings. Set objext codetags to CODETAG_EMPTY before freeing to indicate that the codetag is expected to be empty. Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30lib: add memory allocations report in show_mem()Suren Baghdasaryan
Include allocations in show_mem reports. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30lib: implement context capture support for tagged allocationsSuren Baghdasaryan
Implement mechanisms for capturing allocation call context which consists of: - allocation size - pid, tgid and name of the allocating task - allocation timestamp - allocation call stack The patch creates allocations.ctx file which can be written to enable/disable context capture for a specific code tag. Captured context can be obtained by reading allocations.ctx file. Usage example: echo "file include/asm-generic/pgalloc.h line 63 enable" > \ /sys/kernel/debug/allocations.ctx cat allocations.ctx 91.0MiB 212 include/asm-generic/pgalloc.h:63 module:pgtable func:__pte_alloc_one size: 4096 pid: 1551 tgid: 1551 comm: cat ts: 670109646361 call stack: pte_alloc_one+0xfe/0x130 __pte_alloc+0x22/0x90 move_page_tables.part.0+0x994/0xa60 shift_arg_pages+0xa4/0x180 setup_arg_pages+0x286/0x2d0 load_elf_binary+0x4e1/0x18d0 bprm_execve+0x26b/0x660 do_execveat_common.isra.0+0x19d/0x220 __x64_sys_execve+0x2e/0x40 do_syscall_64+0x38/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd size: 4096 pid: 1551 tgid: 1551 comm: cat ts: 670109711801 call stack: pte_alloc_one+0xfe/0x130 __do_fault+0x52/0xc0 __handle_mm_fault+0x7d9/0xdd0 handle_mm_fault+0xc0/0x2b0 do_user_addr_fault+0x1c3/0x660 exc_page_fault+0x62/0x150 asm_exc_page_fault+0x22/0x30 ... echo "file include/asm-generic/pgalloc.h line 63 disable" > \ /sys/kernel/debug/alloc_tags.ctx Note that disabling context capture will not clear already captured context but no new context will be captured. Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30lib: code tagging context capture supportSuren Baghdasaryan
Add support for code tag context capture when registering a new code tag type. When context capture for a specific code tag is enabled, codetag_ref will point to a codetag_ctx object which can be attached to an application-specific object storing code invocation context. codetag_ctx has a pointer to its codetag_with_ctx object with embedded codetag object in it. All context objects of the same code tag are placed into codetag_with_ctx.ctx_head linked list. codetag.flag is used to indicate when a context capture for the associated code tag is initialized and enabled. Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30move stack capture functionality into a separate function for reuseSuren Baghdasaryan
Make save_stack() function part of stackdepot API to be used outside of page_owner. Also rename task_struct's in_page_owner to in_capture_stack flag to better convey the wider use of this flag. Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30arm64: Fix circular header dependencyKent Overstreet
Replace linux/percpu.h include with asm/percpu.h to avoid circular dependency. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30mm: percpu: enable per-cpu allocation taggingSuren Baghdasaryan
Redefine __alloc_percpu, __alloc_percpu_gfp and __alloc_reserved_percpu to record allocations and deallocations done by these functions. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30mm: percpu: Add codetag reference into pcpuobj_extKent Overstreet
To store codetag for every per-cpu allocation, a codetag reference is embedded into pcpuobj_ext when CONFIG_MEM_ALLOC_PROFILING=y. Hooks to use the newly introduced codetag are added. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30mm: percpu: Introduce pcpuobj_extKent Overstreet
Upcoming alloc tagging patches require a place to stash per-allocation metadata. We already do this when memcg is enabled, so this patch generalizes the obj_cgroup * vector in struct pcpu_chunk by creating a pcpu_obj_ext type, which we will be adding to in an upcoming patch - similarly to the previous slabobj_ext patch. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Suren Baghdasaryan <surenb@google.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Dennis Zhou <dennis@kernel.org> Cc: Tejun Heo <tj@kernel.org> Cc: Christoph Lameter <cl@linux.com> Cc: linux-mm@kvack.org
2023-04-30timekeeping: Fix a circular include dependencyKent Overstreet
This avoids a circular header dependency in an upcoming patch by only making hrtimer.h depend on percpu-defs.h Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Suren Baghdasaryan <surenb@google.com> Cc: Thomas Gleixner <tglx@linutronix.de>
2023-04-30mempool: Hook up to memory allocation profilingKent Overstreet
This adds hooks to mempools for correctly annotating mempool-backed allocations at the correct source line, so they show up correctly in /sys/kernel/debug/allocations. Various inline functions are converted to wrappers so that we can invoke alloc_hooks() in fewer places. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30mm/slub: Mark slab_free_freelist_hook() __always_inlineKent Overstreet
It seems we need to be more forceful with the compiler on this one. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30mm/slab: enable slab allocation tagging for kmalloc and friendsSuren Baghdasaryan
Redefine kmalloc, krealloc, kzalloc, kcalloc, etc. to record allocations and deallocations done by these functions. Signed-off-by: Suren Baghdasaryan <surenb@google.com> Co-developed-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-04-30mm/slab: add allocation accounting into slab allocation and free pathsSuren Baghdasaryan
Account slab allocations using codetag reference embedded into slabobj_ext. Signed-off-by: Suren Baghdasaryan <surenb@google.com> Co-developed-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-04-30lib: add codetag reference into slabobj_extSuren Baghdasaryan
To store code tag for every slab object, a codetag reference is embedded into slabobj_ext when CONFIG_MEM_ALLOC_PROFILING=y. Signed-off-by: Suren Baghdasaryan <surenb@google.com> Co-developed-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-04-30mm: create new codetag references during page splittingSuren Baghdasaryan
When a high-order page is split into smaller ones, each newly split page should get its codetag. The original codetag is reused for these pages but it's recorded as 0-byte allocation because original codetag already accounts for the original high-order allocated page. Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30mm/page_ext: enable early_page_ext when CONFIG_MEM_ALLOC_PROFILING_DEBUG=ySuren Baghdasaryan
For all page allocations to be tagged, page_ext has to be initialized before the first page allocation. Early tasks allocate their stacks using page allocator before alloc_node_page_ext() initializes page_ext area, unless early_page_ext is enabled. Therefore these allocations will generate a warning when CONFIG_MEM_ALLOC_PROFILING_DEBUG is enabled. Enable early_page_ext whenever CONFIG_MEM_ALLOC_PROFILING_DEBUG=y to ensure page_ext initialization prior to any page allocation. This will have all the negative effects associated with early_page_ext, such as possible longer boot time, therefore we enable it only when debugging with CONFIG_MEM_ALLOC_PROFILING_DEBUG enabled and not universally for CONFIG_MEM_ALLOC_PROFILING. Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30mm: enable page allocation taggingSuren Baghdasaryan
Redefine page allocators to record allocation tags upon their invocation. Instrument post_alloc_hook and free_pages_prepare to modify current allocation tag. Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30change alloc_pages name in dma_map_ops to avoid name conflictsSuren Baghdasaryan
After redefining alloc_pages, all uses of that name are being replaced. Change the conflicting names to prevent preprocessor from replacing them when it's not intended. Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30lib: introduce support for page allocation taggingSuren Baghdasaryan
Introduce helper functions to easily instrument page allocators by storing a pointer to the allocation tag associated with the code that allocated the page in a page_ext field. Signed-off-by: Suren Baghdasaryan <surenb@google.com> Co-developed-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-04-30lib: add allocation tagging support for memory allocation profilingSuren Baghdasaryan
Introduce CONFIG_MEM_ALLOC_PROFILING which provides definitions to easily instrument memory allocators. It also registers an "alloc_tags" codetag type with "allocations" defbugfs interface to output allocation tag information. CONFIG_MEM_ALLOC_PROFILING_DEBUG is provided for debugging the memory allocation profiling instrumentation. Co-developed-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30lib: code tagging query helper functionsKent Overstreet
Provide codetag_query_parse() to parse codetag queries and codetag_matches_query() to check if the query affects a given codetag. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30lib: prevent module unloading if memory is not freedSuren Baghdasaryan
Skip freeing module's data section if there are non-zero allocation tags because otherwise, once these allocations are freed, the access to their code tag would cause UAF. Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30lib: code tagging module supportSuren Baghdasaryan
Add support for code tagging from dynamically loaded modules. Signed-off-by: Suren Baghdasaryan <surenb@google.com> Co-developed-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-04-30lib: code tagging frameworkSuren Baghdasaryan
Add basic infrastructure to support code tagging which stores tag common information consisting of the module name, function, file name and line number. Provide functions to register a new code tag type and navigate between code tags. Co-developed-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30slab: objext: introduce objext_flags as extension to page_memcg_data_flagsSuren Baghdasaryan
Introduce objext_flags to store additional objext flags unrelated to memcg. Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30mm: prevent slabobj_ext allocations for slabobj_ext and kmem_cache objectsSuren Baghdasaryan
Use __GFP_NO_OBJ_EXT to prevent recursions when allocating slabobj_ext objects. Also prevent slabobj_ext allocations for kmem_cache objects. Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30mm/slab: introduce SLAB_NO_OBJ_EXT to avoid obj_ext creationSuren Baghdasaryan
Slab extension objects can't be allocated before slab infrastructure is initialized. Some caches, like kmem_cache and kmem_cache_node, are created before slab infrastructure is initialized. Objects from these caches can't have extension objects. Introduce SLAB_NO_OBJ_EXT slab flag to mark these caches and avoid creating extensions for objects allocated from these slabs. Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30mm: introduce __GFP_NO_OBJ_EXT flag to selectively prevent slabobj_ext creationSuren Baghdasaryan
Introduce __GFP_NO_OBJ_EXT flag in order to prevent recursive allocations when allocating slabobj_ext on a slab. Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30mm: introduce slabobj_ext to support slab object extensionsSuren Baghdasaryan
Currently slab pages can store only vectors of obj_cgroup pointers in page->memcg_data. Introduce slabobj_ext structure to allow more data to be stored for each slab object. Wrap obj_cgroup into slabobj_ext to support current functionality while allowing to extend slabobj_ext in the future. Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30Lazy percpu countersKent Overstreet
This patch adds lib/lazy-percpu-counter.c, which implements counters that start out as atomics, but lazily switch to percpu mode if the update rate crosses some threshold (arbitrarily set at 256 per second). Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30lib/string.c: strsep_no_empty()Kent Overstreet
This adds a new helper which is like strsep, except that it skips empty tokens. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30prandom: Remove unused includeKent Overstreet
prandom.h doesn't use percpu.h - this fixes some circular header issues. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30nodemask: Split out include/linux/nodemask_types.hKent Overstreet
sched.h, which defines task_struct, needs nodemask_t - but sched.h is a frequently used header and ideally shouldn't be pulling in any more code that it needs to. This splits out nodemask_types.h which has the definition sched.h needs, which will avoid a circular header dependency in the alloc tagging patch series, and as a bonus should speed up kernel build times. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Suren Baghdasaryan <surenb@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org>
2023-04-30fs: Convert alloc_inode_sb() to a macroKent Overstreet
We're introducing alloc tagging, which tracks memory allocations by callsite. Converting alloc_inode_sb() to a macro means allocations will be tracked by its caller, which is a bit more useful. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Suren Baghdasaryan <surenb@google.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk>
2023-04-30scripts/kallysms: Always include __start and __stop symbolsKent Overstreet
These symbols are used to denote section boundaries: by always including them we can unify loading sections from modules with loading built-in sections, which leads to some significant cleanup. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2023-04-30lib/string_helpers: Drop space in string_get_size's outputKent Overstreet
Previously, string_get_size() outputted a space between the number and the units, i.e. 9.88 MiB This changes it to 9.88MiB which allows it to be parsed correctly by the 'sort -h' command. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Suren Baghdasaryan <surenb@google.com> Cc: Andy Shevchenko <andy@kernel.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: "Noralf Trønnes" <noralf@tronnes.org> Cc: Jens Axboe <axboe@kernel.dk>
2023-04-30Merge tag 'iommu-updates-v6.4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu Pull iommu updates from Joerg Roedel: - Convert to platform remove callback returning void - Extend changing default domain to normal group - Intel VT-d updates: - Remove VT-d virtual command interface and IOASID - Allow the VT-d driver to support non-PRI IOPF - Remove PASID supervisor request support - Various small and misc cleanups - ARM SMMU updates: - Device-tree binding updates: * Allow Qualcomm GPU SMMUs to accept relevant clock properties * Document Qualcomm 8550 SoC as implementing an MMU-500 * Favour new "qcom,smmu-500" binding for Adreno SMMUs - Fix S2CR quirk detection on non-architectural Qualcomm SMMU implementations - Acknowledge SMMUv3 PRI queue overflow when consuming events - Document (in a comment) why ATS is disabled for bypass streams - AMD IOMMU updates: - 5-level page-table support - NUMA awareness for memory allocations - Unisoc driver: Support for reattaching an existing domain - Rockchip driver: Add missing set_platform_dma_ops callback - Mediatek driver: Adjust the dma-ranges - Various other small fixes and cleanups * tag 'iommu-updates-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (82 commits) iommu: Remove iommu_group_get_by_id() iommu: Make iommu_release_device() static iommu/vt-d: Remove BUG_ON in dmar_insert_dev_scope() iommu/vt-d: Remove a useless BUG_ON(dev->is_virtfn) iommu/vt-d: Remove BUG_ON in map/unmap() iommu/vt-d: Remove BUG_ON when domain->pgd is NULL iommu/vt-d: Remove BUG_ON in handling iotlb cache invalidation iommu/vt-d: Remove BUG_ON on checking valid pfn range iommu/vt-d: Make size of operands same in bitwise operations iommu/vt-d: Remove PASID supervisor request support iommu/vt-d: Use non-privileged mode for all PASIDs iommu/vt-d: Remove extern from function prototypes iommu/vt-d: Do not use GFP_ATOMIC when not needed iommu/vt-d: Remove unnecessary checks in iopf disabling path iommu/vt-d: Move PRI handling to IOPF feature path iommu/vt-d: Move pfsid and ats_qdep calculation to device probe path iommu/vt-d: Move iopf code from SVA to IOPF enabling path iommu/vt-d: Allow SVA with device-specific IOPF dmaengine: idxd: Add enable/disable device IOPF feature arm64: dts: mt8186: Add dma-ranges for the parent "soc" node ...
2023-04-30Merge tag 'cxl-for-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxlLinus Torvalds
Pull compute express link updates from Dan Williams: "DOE support is promoted from drivers/cxl/ to drivers/pci/ with Bjorn's blessing, and the CXL core continues to mature its media management capabilities with support for listing and injecting media errors. Some late fixes that missed v6.3-final are also included: - Refactor the DOE infrastructure (Data Object Exchange PCI-config-cycle mailbox) to be a facility of the PCI core rather than the CXL core. This is foundational for upcoming support for PCI device-attestation and PCIe / CXL link encryption. - Add support for retrieving and injecting poison for CXL memory expanders. This enabling uses trace-events to convey CXL media error records to user tooling. It includes translation of device-local addresses (DPA) to system physical addresses (SPA) and their corresponding CXL region. - Fixes for decoder enumeration that missed v6.3-final - Miscellaneous fixups" * tag 'cxl-for-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl: (38 commits) cxl/test: Add mock test for set_timestamp cxl/mbox: Update CMD_RC_TABLE tools/testing/cxl: Require CONFIG_DEBUG_FS tools/testing/cxl: Add a sysfs attr to test poison inject limits tools/testing/cxl: Use injected poison for get poison list tools/testing/cxl: Mock the Clear Poison mailbox command tools/testing/cxl: Mock the Inject Poison mailbox command cxl/mem: Add debugfs attributes for poison inject and clear cxl/memdev: Trace inject and clear poison as cxl_poison events cxl/memdev: Warn of poison inject or clear to a mapped region cxl/memdev: Add support for the Clear Poison mailbox command cxl/memdev: Add support for the Inject Poison mailbox command tools/testing/cxl: Mock support for Get Poison List cxl/trace: Add an HPA to cxl_poison trace events cxl/region: Provide region info to the cxl_poison trace event cxl/memdev: Add trigger_poison_list sysfs attribute cxl/trace: Add TRACE support for CXL media-error records cxl/mbox: Add GET_POISON_LIST mailbox command cxl/mbox: Initialize the poison state cxl/mbox: Restrict poison cmds to debugfs cxl_raw_allow_all ...
2023-04-30Merge tag 's390-6.4-1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 updates from Vasily Gorbik: - Add support for stackleak feature. Also allow specifying architecture-specific stackleak poison function to enable faster implementation. On s390, the mvc-based implementation helps decrease typical overhead from a factor of 3 to just 25% - Convert all assembler files to use SYM* style macros, deprecating the ENTRY() macro and other annotations. Select ARCH_USE_SYM_ANNOTATIONS - Improve KASLR to also randomize module and special amode31 code base load addresses - Rework decompressor memory tracking to support memory holes and improve error handling - Add support for protected virtualization AP binding - Add support for set_direct_map() calls - Implement set_memory_rox() and noexec module_alloc() - Remove obsolete overriding of mem*() functions for KASAN - Rework kexec/kdump to avoid using nodat_stack to call purgatory - Convert the rest of the s390 code to use flexible-array member instead of a zero-length array - Clean up uaccess inline asm - Enable ARCH_HAS_MEMBARRIER_SYNC_CORE - Convert to using CONFIG_FUNCTION_ALIGNMENT and enable DEBUG_FORCE_FUNCTION_ALIGN_64B - Resolve last_break in userspace fault reports - Simplify one-level sysctl registration - Clean up branch prediction handling - Rework CPU counter facility to retrieve available counter sets just once - Other various small fixes and improvements all over the code * tag 's390-6.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (118 commits) s390/stackleak: provide fast __stackleak_poison() implementation stackleak: allow to specify arch specific stackleak poison function s390: select ARCH_USE_SYM_ANNOTATIONS s390/mm: use VM_FLUSH_RESET_PERMS in module_alloc() s390: wire up memfd_secret system call s390/mm: enable ARCH_HAS_SET_DIRECT_MAP s390/mm: use BIT macro to generate SET_MEMORY bit masks s390/relocate_kernel: adjust indentation s390/relocate_kernel: use SYM* macros instead of ENTRY(), etc. s390/entry: use SYM* macros instead of ENTRY(), etc. s390/purgatory: use SYM* macros instead of ENTRY(), etc. s390/kprobes: use SYM* macros instead of ENTRY(), etc. s390/reipl: use SYM* macros instead of ENTRY(), etc. s390/head64: use SYM* macros instead of ENTRY(), etc. s390/earlypgm: use SYM* macros instead of ENTRY(), etc. s390/mcount: use SYM* macros instead of ENTRY(), etc. s390/crc32le: use SYM* macros instead of ENTRY(), etc. s390/crc32be: use SYM* macros instead of ENTRY(), etc. s390/crypto,chacha: use SYM* macros instead of ENTRY(), etc. s390/amode31: use SYM* macros instead of ENTRY(), etc. ...
2023-04-30Merge tag 'kbuild-v6.4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - Refactor scripts/kallsyms to make it faster and easier to maintain - Clean up menuconfig - Provide Clang with hard-coded target triple instead of CROSS_COMPILE - Use -z pack-relative-relocs flags instead of --use-android-relr-tags for arm64 CONFIG_RELR - Add srcdeb-pkg target to build only a Debian source package - Add KDEB_SOURCE_COMPRESS option to specify the compression for a Debian source package - Misc cleanups and fixes * tag 'kbuild-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kbuild: deb-pkg: specify targets in debian/rules as .PHONY sparc: unify sparc32/sparc64 archhelp kbuild: rpm-pkg: remove kernel-drm PROVIDES kbuild: deb-pkg: add KDEB_SOURCE_COMPRESS to specify source compression kbuild: add srcdeb-pkg target Makefile: use -z pack-relative-relocs kbuild: clang: do not use CROSS_COMPILE for target triple kconfig: menuconfig: reorder functions to remove forward declarations kconfig: menuconfig: remove unused M_EVENT macro kconfig: menuconfig: remove OLD_NCURSES macro kbuild: builddeb: Eliminate debian/arch use scripts/kallsyms: update the usage in the comment block scripts/kallsyms: decrease expand_symbol() / cleanup_symbol_name() calls scripts/kallsyms: change the output order scripts/kallsyms: move compiler-generated symbol patterns to mksysmap scripts/kallsyms: exclude symbols generated by itself dynamically scripts/mksysmap: use sed with in-line comments scripts/mksysmap: remove comments described in nm(1) scripts/kallsyms: remove redundant code for omitting U and N kallsyms: expand symbol name into comment for debugging
2023-04-30Merge tag 'rust-6.4' of https://github.com/Rust-for-Linux/linuxLinus Torvalds
Pull rust updates from Miguel Ojeda "More additions to the Rust core. Importantly, this adds the pin-init API, which will be used by other abstractions, such as the synchronization ones added here too: - pin-init API: a solution for the safe pinned initialization problem. This allows to reduce the need for 'unsafe' code in the kernel when dealing with data structures that require a stable address. Commit 90e53c5e70a6 ("rust: add pin-init API core") contains a nice introduction -- here is an example of how it looks like: #[pin_data] struct Example { #[pin] value: Mutex<u32>, #[pin] value_changed: CondVar, } impl Example { fn new() -> impl PinInit<Self> { pin_init!(Self { value <- new_mutex!(0), value_changed <- new_condvar!(), }) } } // In a `Box`. let b = Box::pin_init(Example::new())?; // In the stack. stack_pin_init!(let s = Example::new()); - 'sync' module: New types 'LockClassKey' ('struct lock_class_key'), 'Lock', 'Guard', 'Mutex' ('struct mutex'), 'SpinLock' ('spinlock_t'), 'LockedBy' and 'CondVar' (uses 'wait_queue_head_t'), plus macros such as 'static_lock_class!' and 'new_spinlock!'. In particular, 'Lock' and 'Guard' are generic implementations that contain code that is common to all locks. Then, different backends (the new 'Backend' trait) are implemented and used to define types like 'Mutex': type Mutex<T> = Lock<T, MutexBackend>; In addition, new methods 'assume_init()', 'init_with()' and 'pin_init_with()' for 'UniqueArc<MaybeUninit<T>>' and 'downcast()' for 'Arc<dyn Any + Send + Sync>'; as well as 'Debug' and 'Display' implementations for 'Arc' and 'UniqueArc'. Reduced stack usage of 'UniqueArc::try_new_uninit()', too. - 'types' module: New trait 'AlwaysRefCounted' and new type 'ARef' (an owned reference to an always-reference-counted object, meant to be used in wrappers for C types that have their own ref counting functions). Moreover, new associated functions 'raw_get()' and 'ffi_init()' for 'Opaque'. - New 'task' module with a new type 'Task' ('struct task_struct'), and a new macro 'current!' to safely get a reference to the current one. - New 'ioctl' module with new '_IOC*' const functions (equivalent to the C macros). - New 'uapi' crate, intended to be accessible by drivers directly. - 'macros' crate: new 'quote!' macro (similar to the one provided in userspace by the 'quote' crate); and the 'module!' macro now allows specifying multiple module aliases. - 'error' module: New associated functions for the 'Error' type, such as 'from_errno()' and new functions such as 'to_result()'. - 'alloc' crate: More fallible 'Vec' methods: 'try_resize` and 'try_extend_from_slice' and the infrastructure (imported from the Rust standard library) they need" * tag 'rust-6.4' of https://github.com/Rust-for-Linux/linux: (44 commits) rust: ioctl: Add ioctl number manipulation functions rust: uapi: Add UAPI crate rust: sync: introduce `CondVar` rust: lock: add `Guard::do_unlocked` rust: sync: introduce `LockedBy` rust: introduce `current` rust: add basic `Task` rust: introduce `ARef` rust: lock: introduce `SpinLock` rust: lock: introduce `Mutex` rust: sync: introduce `Lock` and `Guard` rust: sync: introduce `LockClassKey` MAINTAINERS: add Benno Lossin as Rust reviewer rust: init: broaden the blanket impl of `Init` rust: sync: add functions for initializing `UniqueArc<MaybeUninit<T>>` rust: sync: reduce stack usage of `UniqueArc::try_new_uninit` rust: types: add `Opaque::ffi_init` rust: prelude: add `pin-init` API items to prelude rust: init: add `Zeroable` trait and `init::zeroed` function rust: init: add `stack_pin_init!` macro ...
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