user/sven/linux.git/kernel/sysctl.c, branch v6.15.7

Merge tag 's390-6.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

2025-03-29T18:59:43Z

Pull s390 updates from Vasily Gorbik: - Add sorting of mcount locations at build time - Rework uaccess functions with C exception handling to shorten inline assembly size and enable full inlining. This yields near-optimal code for small constant copies with a ~40kb kernel size increase - Add support for a configurable STRICT_MM_TYPECHECKS which allows to generate better code, but also allows to have type checking for debug builds - Optimize get_lowcore() for common callers with alternatives that nearly revert to the pre-relocated lowcore code, while also slightly reducing syscall entry and exit time - Convert MACHINE_HAS_* checks for single facility tests into cpu_has_* style macros that call test_facility(), and for features with additional conditions, add a new ALT_TYPE_FEATURE alternative to provide a static branch via alternative patching. Also, move machine feature detection to the decompressor for early patching and add debugging functionality to easily show which alternatives are patched - Add exception table support to early boot / startup code to get rid of the open coded exception handling - Use asm_inline for all inline assemblies with EX_TABLE or ALTERNATIVE to ensure correct inlining and unrolling decisions - Remove 2k page table leftovers now that s390 has been switched to always allocate 4k page tables - Split kfence pool into 4k mappings in arch_kfence_init_pool() and remove the architecture-specific kfence_split_mapping() - Use READ_ONCE_NOCHECK() in regs_get_kernel_stack_nth() to silence spurious KASAN warnings from opportunistic ftrace argument tracing - Force __atomic_add_const() variants on s390 to always return void, ensuring compile errors for improper usage - Remove s390's ioremap_wt() and pgprot_writethrough() due to mismatched semantics and lack of known users, relying on asm-generic fallbacks - Signal eventfd in vfio-ap to notify userspace when the guest AP configuration changes, including during mdev removal - Convert mdev_types from an array to a pointer in vfio-ccw and vfio-ap drivers to avoid fake flex array confusion - Cleanup trap code - Remove references to the outdated linux390@de.ibm.com address - Other various small fixes and improvements all over the code * tag 's390-6.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (78 commits) s390: Use inline qualifier for all EX_TABLE and ALTERNATIVE inline assemblies s390/kfence: Split kfence pool into 4k mappings in arch_kfence_init_pool() s390/ptrace: Avoid KASAN false positives in regs_get_kernel_stack_nth() s390/boot: Ignore vmlinux.map s390/sysctl: Remove "vm/allocate_pgste" sysctl s390: Remove 2k vs 4k page table leftovers s390/tlb: Use mm_has_pgste() instead of mm_alloc_pgste() s390/lowcore: Use lghi instead llilh to clear register s390/syscall: Merge __do_syscall() and do_syscall() s390/spinlock: Implement SPINLOCK_LOCKVAL with inline assembly s390/smp: Implement raw_smp_processor_id() with inline assembly s390/current: Implement current with inline assembly s390/lowcore: Use inline qualifier for get_lowcore() inline assembly s390: Move s390 sysctls into their own file under arch/s390 s390/syscall: Simplify syscall_get_arguments() s390/vfio-ap: Notify userspace that guest's AP config changed when mdev removed s390: Remove ioremap_wt() and pgprot_writethrough() s390/mm: Add configurable STRICT_MM_TYPECHECKS s390/mm: Convert pgste_val() into function s390/mm: Convert pgprot_val() into function ...

Merge tag 'sysctl-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/sysctl/sysctl

2025-03-27T04:02:05Z

Pull sysctl updates from Joel Granados: - Move vm_table members out of kernel/sysctl.c All vm_table array members have moved to their respective subsystems leading to the removal of vm_table from kernel/sysctl.c. This increases modularity by placing the ctl_tables closer to where they are actually used and at the same time reducing the chances of merge conflicts in kernel/sysctl.c. - ctl_table range fixes Replace the proc_handler function that checks variable ranges in coredump_sysctls and vdso_table with the one that actually uses the extra{1,2} pointers as min/max values. This tightens the range of the values that users can pass into the kernel effectively preventing {under,over}flows. - Misc fixes Correct grammar errors and typos in test messages. Update sysctl files in MAINTAINERS. Constified and removed array size in declaration for alignment_tbl * tag 'sysctl-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/sysctl/sysctl: (22 commits) selftests/sysctl: fix wording of help messages selftests: fix spelling/grammar errors in sysctl/sysctl.sh MAINTAINERS: Update sysctl file list in MAINTAINERS sysctl: Fix underflow value setting risk in vm_table coredump: Fixes core_pipe_limit sysctl proc_handler sysctl: remove unneeded include sysctl: remove the vm_table sh: vdso: move the sysctl to arch/sh/kernel/vsyscall/vsyscall.c x86: vdso: move the sysctl to arch/x86/entry/vdso/vdso32-setup.c fs: dcache: move the sysctl to fs/dcache.c sunrpc: simplify rpcauth_cache_shrink_count() fs: drop_caches: move sysctl to fs/drop_caches.c fs: fs-writeback: move sysctl to fs/fs-writeback.c mm: nommu: move sysctl to mm/nommu.c security: min_addr: move sysctl to security/min_addr.c mm: mmap: move sysctl to mm/mmap.c mm: util: move sysctls to mm/util.c mm: vmscan: move vmscan sysctls to mm/vmscan.c mm: swap: move sysctl to mm/swap.c mm: filemap: move sysctl to mm/filemap.c ...

Merge tag 'x86-core-2025-03-22' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2025-03-25T05:06:11Z

Pull core x86 updates from Ingo Molnar: "x86 CPU features support: - Generate the header based on build config (H. Peter Anvin, Xin Li) - x86 CPUID parsing updates and fixes (Ahmed S. Darwish) - Introduce the 'setcpuid=' boot parameter (Brendan Jackman) - Enable modifying CPU bug flags with '{clear,set}puid=' (Brendan Jackman) - Utilize CPU-type for CPU matching (Pawan Gupta) - Warn about unmet CPU feature dependencies (Sohil Mehta) - Prepare for new Intel Family numbers (Sohil Mehta) Percpu code: - Standardize & reorganize the x86 percpu layout and related cleanups (Brian Gerst) - Convert the stackprotector canary to a regular percpu variable (Brian Gerst) - Add a percpu subsection for cache hot data (Brian Gerst) - Unify __pcpu_op{1,2}_N() macros to __pcpu_op_N() (Uros Bizjak) - Construct __percpu_seg_override from __percpu_seg (Uros Bizjak) MM: - Add support for broadcast TLB invalidation using AMD's INVLPGB instruction (Rik van Riel) - Rework ROX cache to avoid writable copy (Mike Rapoport) - PAT: restore large ROX pages after fragmentation (Kirill A. Shutemov, Mike Rapoport) - Make memremap(MEMREMAP_WB) map memory as encrypted by default (Kirill A. Shutemov) - Robustify page table initialization (Kirill A. Shutemov) - Fix flush_tlb_range() when used for zapping normal PMDs (Jann Horn) - Clear _PAGE_DIRTY for kernel mappings when we clear _PAGE_RW (Matthew Wilcox) KASLR: - x86/kaslr: Reduce KASLR entropy on most x86 systems, to support PCI BAR space beyond the 10TiB region (CONFIG_PCI_P2PDMA=y) (Balbir Singh) CPU bugs: - Implement FineIBT-BHI mitigation (Peter Zijlstra) - speculation: Simplify and make CALL_NOSPEC consistent (Pawan Gupta) - speculation: Add a conditional CS prefix to CALL_NOSPEC (Pawan Gupta) - RFDS: Exclude P-only parts from the RFDS affected list (Pawan Gupta) System calls: - Break up entry/common.c (Brian Gerst) - Move sysctls into arch/x86 (Joel Granados) Intel LAM support updates: (Maciej Wieczor-Retman) - selftests/lam: Move cpu_has_la57() to use cpuinfo flag - selftests/lam: Skip test if LAM is disabled - selftests/lam: Test get_user() LAM pointer handling AMD SMN access updates: - Add SMN offsets to exclusive region access (Mario Limonciello) - Add support for debugfs access to SMN registers (Mario Limonciello) - Have HSMP use SMN through AMD_NODE (Yazen Ghannam) Power management updates: (Patryk Wlazlyn) - Allow calling mwait_play_dead with an arbitrary hint - ACPI/processor_idle: Add FFH state handling - intel_idle: Provide the default enter_dead() handler - Eliminate mwait_play_dead_cpuid_hint() Build system: - Raise the minimum GCC version to 8.1 (Brian Gerst) - Raise the minimum LLVM version to 15.0.0 (Nathan Chancellor) Kconfig: (Arnd Bergmann) - Add cmpxchg8b support back to Geode CPUs - Drop 32-bit "bigsmp" machine support - Rework CONFIG_GENERIC_CPU compiler flags - Drop configuration options for early 64-bit CPUs - Remove CONFIG_HIGHMEM64G support - Drop CONFIG_SWIOTLB for PAE - Drop support for CONFIG_HIGHPTE - Document CONFIG_X86_INTEL_MID as 64-bit-only - Remove old STA2x11 support - Only allow CONFIG_EISA for 32-bit Headers: - Replace __ASSEMBLY__ with __ASSEMBLER__ in UAPI and non-UAPI headers (Thomas Huth) Assembly code & machine code patching: - x86/alternatives: Simplify alternative_call() interface (Josh Poimboeuf) - x86/alternatives: Simplify callthunk patching (Peter Zijlstra) - KVM: VMX: Use named operands in inline asm (Josh Poimboeuf) - x86/hyperv: Use named operands in inline asm (Josh Poimboeuf) - x86/traps: Cleanup and robustify decode_bug() (Peter Zijlstra) - x86/kexec: Merge x86_32 and x86_64 code using macros from (Uros Bizjak) - Use named operands in inline asm (Uros Bizjak) - Improve performance by using asm_inline() for atomic locking instructions (Uros Bizjak) Earlyprintk: - Harden early_serial (Peter Zijlstra) NMI handler: - Add an emergency handler in nmi_desc & use it in nmi_shootdown_cpus() (Waiman Long) Miscellaneous fixes and cleanups: - by Ahmed S. Darwish, Andy Shevchenko, Ard Biesheuvel, Artem Bityutskiy, Borislav Petkov, Brendan Jackman, Brian Gerst, Dan Carpenter, Dr. David Alan Gilbert, H. Peter Anvin, Ingo Molnar, Josh Poimboeuf, Kevin Brodsky, Mike Rapoport, Lukas Bulwahn, Maciej Wieczor-Retman, Max Grobecker, Patryk Wlazlyn, Pawan Gupta, Peter Zijlstra, Philip Redkin, Qasim Ijaz, Rik van Riel, Thomas Gleixner, Thorsten Blum, Tom Lendacky, Tony Luck, Uros Bizjak, Vitaly Kuznetsov, Xin Li, liuye" * tag 'x86-core-2025-03-22' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (211 commits) zstd: Increase DYNAMIC_BMI2 GCC version cutoff from 4.8 to 11.0 to work around compiler segfault x86/asm: Make asm export of __ref_stack_chk_guard unconditional x86/mm: Only do broadcast flush from reclaim if pages were unmapped perf/x86/intel, x86/cpu: Replace Pentium 4 model checks with VFM ones perf/x86/intel, x86/cpu: Simplify Intel PMU initialization x86/headers: Replace __ASSEMBLY__ with __ASSEMBLER__ in non-UAPI headers x86/headers: Replace __ASSEMBLY__ with __ASSEMBLER__ in UAPI headers x86/locking/atomic: Improve performance by using asm_inline() for atomic locking instructions x86/asm: Use asm_inline() instead of asm() in clwb() x86/asm: Use CLFLUSHOPT and CLWB mnemonics in x86/hweight: Use asm_inline() instead of asm() x86/hweight: Use ASM_CALL_CONSTRAINT in inline asm() x86/hweight: Use named operands in inline asm() x86/stackprotector/64: Only export __ref_stack_chk_guard on CONFIG_SMP x86/head/64: Avoid Clang < 17 stack protector in startup code x86/kexec: Merge x86_32 and x86_64 code using macros from x86/runtime-const: Add the RUNTIME_CONST_PTR assembly macro x86/cpu/intel: Limit the non-architectural constant_tsc model checks x86/mm/pat: Replace Intel x86_model checks with VFM ones x86/cpu/intel: Fix fast string initialization for extended Families ...

s390: Move s390 sysctls into their own file under arch/s390

2025-03-18T16:13:04Z

Move s390 sysctls (spin_retry and userprocess_debug) into their own files under arch/s390. Create two new sysctl tables (2390_{fault,spin}_sysctl_table) which will be initialized with arch_initcall placing them after their original place in proc_root_init. This is part of a greater effort to move ctl tables into their respective subsystems which will reduce the merge conflicts in kernel/sysctl.c. Signed-off-by: joel granados Acked-by: Heiko Carstens Link: https://lore.kernel.org/r/20250306-jag-mv_ctltables-v2-6-71b243c8d3f8@kernel.org Signed-off-by: Vasily Gorbik

perf/core: Move perf_event sysctls into kernel/events

2025-02-21T13:53:02Z

Move ctl tables to two files: - perf_event_{paranoid,mlock_kb,max_sample_rate} and perf_cpu_time_max_percent into kernel/events/core.c - perf_event_max_{stack,context_per_stack} into kernel/events/callchain.c Make static variables and functions that are fully contained in core.c and callchain.cand remove them from include/linux/perf_event.h. Additionally six_hundred_forty_kb is moved to callchain.c. Two new sysctl tables are added ({callchain,events_core}_sysctl_table) with their respective sysctl registration functions. This is part of a greater effort to move ctl tables into their respective subsystems which will reduce the merge conflicts in kerenel/sysctl.c. Signed-off-by: Joel Granados Signed-off-by: Ingo Molnar Acked-by: Peter Zijlstra (Intel) Link: https://lore.kernel.org/r/20250218-jag-mv_ctltables-v1-5-cd3698ab8d29@kernel.org

x86: Move sysctls into arch/x86

2025-02-18T10:08:36Z

Move the following sysctl tables into arch/x86/kernel/setup.c: panic_on_{unrecoverable_nmi,io_nmi} bootloader_{type,version} io_delay_type unknown_nmi_panic acpi_realmode_flags Variables moved from include/linux/ to arch/x86/include/asm/ because there is no longer need for them outside arch/x86/kernel: acpi_realmode_flags panic_on_{unrecoverable_nmi,io_nmi} Include in arch/s86/kernel/setup.h in order to bring in panic_on_{io_nmi,unrecovered_nmi}. This is part of a greater effort to move ctl tables into their respective subsystems which will reduce the merge conflicts in kerenel/sysctl.c. Signed-off-by: Joel Granados Signed-off-by: Ingo Molnar Link: https://lore.kernel.org/r/20250218-jag-mv_ctltables-v1-8-cd3698ab8d29@kernel.org

sysctl: remove unneeded include

2025-02-07T15:53:05Z

Removing unneeded mm includes in kernel/sysctl.c. Signed-off-by: Kaixiong Yu Reviewed-by: Kees Cook Reviewed-by: Kalesh AP Reviewed-by: Jeff Layton Signed-off-by: Joel Granados

sysctl: remove the vm_table

2025-02-07T15:53:05Z

After patch1~14 is applied, all sysctls of vm_table would be moved. So, delete vm_table. Signed-off-by: Kaixiong Yu Signed-off-by: Joel Granados

sh: vdso: move the sysctl to arch/sh/kernel/vsyscall/vsyscall.c

2025-02-07T15:53:04Z

When CONFIG_SUPERH and CONFIG_VSYSCALL are defined, vdso_enabled belongs to arch/sh/kernel/vsyscall/vsyscall.c. So, move it into its own file. To avoid failure when registering the vdso_table, move the call to register_sysctl_init() into its own fs_initcall(). Signed-off-by: Kaixiong Yu Reviewed-by: Kees Cook Signed-off-by: Joel Granados

x86: vdso: move the sysctl to arch/x86/entry/vdso/vdso32-setup.c

2025-02-07T15:53:04Z

When CONFIG_X86_32 is defined and CONFIG_UML is not defined, vdso_enabled belongs to arch/x86/entry/vdso/vdso32-setup.c. So, move it into its own file. Before this patch, vdso_enabled was allowed to be set to a value exceeding 1 on x86_32 architecture. After this patch is applied, vdso_enabled is not permitted to set the value more than 1. It does not matter, because according to the function load_vdso32(), only vdso_enabled is set to 1, VDSO would be enabled. Other values all mean "disabled". The same limitation could be seen in the function vdso32_setup(). Signed-off-by: Kaixiong Yu Reviewed-by: Kees Cook Signed-off-by: Joel Granados