linux/arch/riscv, branch master

Merge tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf

2026-04-17T22:58:22Z

Pull bpf fixes from Alexei Starovoitov: "Most of the diff stat comes from Xu Kuohai's fix to emit ENDBR/BTI, since all JITs had to be touched to move constant blinding out and pass bpf_verifier_env in. - Fix use-after-free in arena_vm_close on fork (Alexei Starovoitov) - Dissociate struct_ops program with map if map_update fails (Amery Hung) - Fix out-of-range and off-by-one bugs in arm64 JIT (Daniel Borkmann) - Fix precedence bug in convert_bpf_ld_abs alignment check (Daniel Borkmann) - Fix arg tracking for imprecise/multi-offset in BPF_ST/STX insns (Eduard Zingerman) - Copy token from main to subprogs to fix missing kallsyms (Eduard Zingerman) - Prevent double close and leak of btf objects in libbpf (Jiri Olsa) - Fix af_unix null-ptr-deref in sockmap (Michal Luczaj) - Fix NULL deref in map_kptr_match_type for scalar regs (Mykyta Yatsenko) - Avoid unnecessary IPIs. Remove redundant bpf_flush_icache() in arm64 and riscv JITs (Puranjay Mohan) - Fix out of bounds access. Validate node_id in arena_alloc_pages() (Puranjay Mohan) - Reject BPF-to-BPF calls and callbacks in arm32 JIT (Puranjay Mohan) - Refactor all JITs to pass bpf_verifier_env to emit ENDBR/BTI for indirect jump targets on x86-64, arm64 JITs (Xu Kuohai) - Allow UTF-8 literals in bpf_bprintf_prepare() (Yihan Ding)" * tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf: (32 commits) bpf, arm32: Reject BPF-to-BPF calls and callbacks in the JIT bpf: Dissociate struct_ops program with map if map_update fails bpf: Validate node_id in arena_alloc_pages() libbpf: Prevent double close and leak of btf objects selftests/bpf: cover UTF-8 trace_printk output bpf: allow UTF-8 literals in bpf_bprintf_prepare() selftests/bpf: Reject scalar store into kptr slot bpf: Fix NULL deref in map_kptr_match_type for scalar regs bpf: Fix precedence bug in convert_bpf_ld_abs alignment check bpf, arm64: Emit BTI for indirect jump target bpf, x86: Emit ENDBR for indirect jump targets bpf: Add helper to detect indirect jump targets bpf: Pass bpf_verifier_env to JIT bpf: Move constants blinding out of arch-specific JITs bpf, sockmap: Take state lock for af_unix iter bpf, sockmap: Fix af_unix null-ptr-deref in proto update selftests/bpf: Extend bpf_iter_unix to attempt deadlocking bpf, sockmap: Fix af_unix iter deadlock bpf, sockmap: Annotate af_unix sock:: Sk_state data-races selftests/bpf: verify kallsyms entries for token-loaded subprograms ...

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2026-04-17T14:18:03Z

Pull kvm updates from Paolo Bonzini: "Arm: - Add support for tracing in the standalone EL2 hypervisor code, which should help both debugging and performance analysis. This uses the new infrastructure for 'remote' trace buffers that can be exposed by non-kernel entities such as firmware, and which came through the tracing tree - Add support for GICv5 Per Processor Interrupts (PPIs), as the starting point for supporting the new GIC architecture in KVM - Finally add support for pKVM protected guests, where pages are unmapped from the host as they are faulted into the guest and can be shared back from the guest using pKVM hypercalls. Protected guests are created using a new machine type identifier. As the elusive guestmem has not yet delivered on its promises, anonymous memory is also supported This is only a first step towards full isolation from the host; for example, the CPU register state and DMA accesses are not yet isolated. Because this does not really yet bring fully what it promises, it is hidden behind CONFIG_ARM_PKVM_GUEST + 'kvm-arm.mode=protected', and also triggers TAINT_USER when a VM is created. Caveat emptor - Rework the dreaded user_mem_abort() function to make it more maintainable, reducing the amount of state being exposed to the various helpers and rendering a substantial amount of state immutable - Expand the Stage-2 page table dumper to support NV shadow page tables on a per-VM basis - Tidy up the pKVM PSCI proxy code to be slightly less hard to follow - Fix both SPE and TRBE in non-VHE configurations so that they do not generate spurious, out of context table walks that ultimately lead to very bad HW lockups - A small set of patches fixing the Stage-2 MMU freeing in error cases - Tighten-up accepted SMC immediate value to be only #0 for host SMCCC calls - The usual cleanups and other selftest churn LoongArch: - Use CSR_CRMD_PLV for kvm_arch_vcpu_in_kernel() - Add DMSINTC irqchip in kernel support RISC-V: - Fix steal time shared memory alignment checks - Fix vector context allocation leak - Fix array out-of-bounds in pmu_ctr_read() and pmu_fw_ctr_read_hi() - Fix double-free of sdata in kvm_pmu_clear_snapshot_area() - Fix integer overflow in kvm_pmu_validate_counter_mask() - Fix shift-out-of-bounds in make_xfence_request() - Fix lost write protection on huge pages during dirty logging - Split huge pages during fault handling for dirty logging - Skip CSR restore if VCPU is reloaded on the same core - Implement kvm_arch_has_default_irqchip() for KVM selftests - Factored-out ISA checks into separate sources - Added hideleg to struct kvm_vcpu_config - Factored-out VCPU config into separate sources - Support configuration of per-VM HGATP mode from KVM user space s390: - Support for ESA (31-bit) guests inside nested hypervisors - Remove restriction on memslot alignment, which is not needed anymore with the new gmap code - Fix LPSW/E to update the bear (which of course is the breaking event address register) x86: - Shut up various UBSAN warnings on reading module parameter before they were initialized - Don't zero-allocate page tables that are used for splitting hugepages in the TDP MMU, as KVM is guaranteed to set all SPTEs in the page table and thus write all bytes - As an optimization, bail early when trying to unsync 4KiB mappings if the target gfn can just be mapped with a 2MiB hugepage x86 generic: - Copy single-chunk MMIO write values into struct kvm_vcpu (more precisely struct kvm_mmio_fragment) to fix use-after-free stack bugs where KVM would dereference stack pointer after an exit to userspace - Clean up and comment the emulated MMIO code to try to make it easier to maintain (not necessarily "easy", but "easier") - Move VMXON+VMXOFF and EFER.SVME toggling out of KVM (not *all* of VMX and SVM enabling) as it is needed for trusted I/O - Advertise support for AVX512 Bit Matrix Multiply (BMM) instructions - Immediately fail the build if a required #define is missing in one of KVM's headers that is included multiple times - Reject SET_GUEST_DEBUG with -EBUSY if there's an already injected exception, mostly to prevent syzkaller from abusing the uAPI to trigger WARNs, but also because it can help prevent userspace from unintentionally crashing the VM - Exempt SMM from CPUID faulting on Intel, as per the spec - Misc hardening and cleanup changes x86 (AMD): - Fix and optimize IRQ window inhibit handling for AVIC; make it per-vCPU so that KVM doesn't prematurely re-enable AVIC if multiple vCPUs have to-be-injected IRQs - Clean up and optimize the OSVW handling, avoiding a bug in which KVM would overwrite state when enabling virtualization on multiple CPUs in parallel. This should not be a problem because OSVW should usually be the same for all CPUs - Drop a WARN in KVM_MEMORY_ENCRYPT_REG_REGION where KVM complains about a "too large" size based purely on user input - Clean up and harden the pinning code for KVM_MEMORY_ENCRYPT_REG_REGION - Disallow synchronizing a VMSA of an already-launched/encrypted vCPU, as doing so for an SNP guest will crash the host due to an RMP violation page fault - Overhaul KVM's APIs for detecting SEV+ guests so that VM-scoped queries are required to hold kvm->lock, and enforce it by lockdep. Fix various bugs where sev_guest() was not ensured to be stable for the whole duration of a function or ioctl - Convert a pile of kvm->lock SEV code to guard() - Play nicer with userspace that does not enable KVM_CAP_EXCEPTION_PAYLOAD, for which KVM needs to set CR2 and DR6 as a response to ioctls such as KVM_GET_VCPU_EVENTS (even if the payload would end up in EXITINFO2 rather than CR2, for example). Only set CR2 and DR6 when consumption of the payload is imminent, but on the other hand force delivery of the payload in all paths where userspace retrieves CR2 or DR6 - Use vcpu->arch.cr2 when updating vmcb12's CR2 on nested #VMEXIT instead of vmcb02->save.cr2. The value is out of sync after a save/restore or after a #PF is injected into L2 - Fix a class of nSVM bugs where some fields written by the CPU are not synchronized from vmcb02 to cached vmcb12 after VMRUN, and so are not up-to-date when saved by KVM_GET_NESTED_STATE - Fix a class of bugs where the ordering between KVM_SET_NESTED_STATE and KVM_SET_{S}REGS could cause vmcb02 to be incorrectly initialized after save+restore - Add a variety of missing nSVM consistency checks - Fix several bugs where KVM failed to correctly update VMCB fields on nested #VMEXIT - Fix several bugs where KVM failed to correctly synthesize #UD or #GP for SVM-related instructions - Add support for save+restore of virtualized LBRs (on SVM) - Refactor various helpers and macros to improve clarity and (hopefully) make the code easier to maintain - Aggressively sanitize fields when copying from vmcb12, to guard against unintentionally allowing L1 to utilize yet-to-be-defined features - Fix several bugs where KVM botched rAX legality checks when emulating SVM instructions. There are remaining issues in that KVM doesn't handle size prefix overrides for 64-bit guests - Fail emulation of VMRUN/VMLOAD/VMSAVE if mapping vmcb12 fails instead of somewhat arbitrarily synthesizing #GP (i.e. don't double down on AMD's architectural but sketchy behavior of generating #GP for "unsupported" addresses) - Cache all used vmcb12 fields to further harden against TOCTOU bugs x86 (Intel): - Drop obsolete branch hint prefixes from the VMX instruction macros - Use ASM_INPUT_RM() in __vmcs_writel() to coerce clang into using a register input when appropriate - Code cleanups guest_memfd: - Don't mark guest_memfd folios as accessed, as guest_memfd doesn't support reclaim, the memory is unevictable, and there is no storage to write back to LoongArch selftests: - Add KVM PMU test cases s390 selftests: - Enable more memory selftests x86 selftests: - Add support for Hygon CPUs in KVM selftests - Fix a bug in the MSR test where it would get false failures on AMD/Hygon CPUs with exactly one of RDPID or RDTSCP - Add an MADV_COLLAPSE testcase for guest_memfd as a regression test for a bug where the kernel would attempt to collapse guest_memfd folios against KVM's will" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (373 commits) KVM: x86: use inlines instead of macros for is_sev_*guest x86/virt: Treat SVM as unsupported when running as an SEV+ guest KVM: SEV: Goto an existing error label if charging misc_cg for an ASID fails KVM: SVM: Move lock-protected allocation of SEV ASID into a separate helper KVM: SEV: use mutex guard in snp_handle_guest_req() KVM: SEV: use mutex guard in sev_mem_enc_unregister_region() KVM: SEV: use mutex guard in sev_mem_enc_ioctl() KVM: SEV: use mutex guard in snp_launch_update() KVM: SEV: Assert that kvm->lock is held when querying SEV+ support KVM: SEV: Document that checking for SEV+ guests when reclaiming memory is "safe" KVM: SEV: Hide "struct kvm_sev_info" behind CONFIG_KVM_AMD_SEV=y KVM: SEV: WARN on unhandled VM type when initializing VM KVM: LoongArch: selftests: Add PMU overflow interrupt test KVM: LoongArch: selftests: Add basic PMU event counting test KVM: LoongArch: selftests: Add cpucfg read/write helpers LoongArch: KVM: Add DMSINTC inject msi to vCPU LoongArch: KVM: Add DMSINTC device support LoongArch: KVM: Make vcpu_is_preempted() as a macro rather than function LoongArch: KVM: Move host CSR_GSTAT save and restore in context switch LoongArch: KVM: Move host CSR_EENTRY save and restore in context switch ...

Merge tag 'soc-dt-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

2026-04-17T03:28:48Z

Pull SoC devicetree updates from Arnd Bergmann: "A number of SoC platforms are adding modernized variants of their already supported chips time, with a total of 12 new SoCs, and two older SoC getting removed: - Qualcomm Glymur is a compute SoC using 18 Oryon-2 CPU cores - Qualcomm Mahua is a variant of Glymur with only 12 CPU cores, but largely identical. - Qualcomm Eliza is an embeded platform for mobile phone (SM7750) and IOT (QC7790S/M) workloads - Qualcomm IPQ5210 is a wireless networking SoC using Cortex-A53 cores - Qualcomm apq8084 and ipq806x had only rudimentary support but no actual products using them, so they are now gone. - Axis ARTPEC-9 is a follow-up to the ARTPEC-8 embedded SoC, using the Samsung SoC platform but now with Cortex-A55 cores - ARM Zena is a virtual platform in FVP using Cortex-A720AE cores, with additional versions planned to be merged in the future. - ARM corstone-1000-a320 is a reference platform for IOT, using low-end Cortex-A320 cores - Microchip LAN9691 is an updated 64-bit variant of the arm32 lan966x series of networking SoCs - Microchip PIC64GX is an embedded RISC-V chip using SIFIVE U54 CPU cores - Rockchip RV1103B is the low-end 32-bit single-core vision processor - Renesas RZ/G3L (r9a08g046) is an industrial embedded chip using Cortex-A55 cores, similar to the G3E and G3S variants we already supported. - NXP S32N79 is an automotive SoC using Cortex-A78AE cores, a significant upgrade from the older S32V and S32G series These all come with at least one reference board or an initial product using these, in total there are 67 newly added boards. The ones for already supported SoCs are: - Two more Aspeed BMC based boards - Three older tablets based on 32-bit OMAP4 and Exynos5 SoCs - One Set-top-box based on Allwinner H6 - 22 additional industrial/embedded boards using 64-bit NXP i.MX8M or i.MX9 SoCs - 20 Qualcomm SoC based machines across all possible markets: workstation, gaming, laptop, phone, networking, reference, ... - Three more Rockchips rk35xx based boards - Four variants of the Toradex Verdin using TI AM62 Other notable bits are: - A cleanup for the 32-bit Tegra paz00 board moved the last board specific code on Tegra into equivalent dts syntax. - There continues to be a significant number of fixes for static checking of dtc syntax, but it feels like this is slowing down, hopefully getting into a state where most known issues are addressed - Additional hardware support for many existing boards across SoC families, notably Qualcomm, Broadcom, i.MX2, i.MX6, Rockchips, STM32, Mediatek, Tegra, TI and Microchip" * tag 'soc-dt-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (841 commits) arm64: dts: ti: k3: Use memory-region-names for r5f ARM: dts: imx: Add DT overlays for DH i.MX6 DHCOM SoM and boards ARM: dts: imx6sx: remove fallback compatible string fsl,imx28-lcdif ARM: dts: imx25: rename node name tcq to touchscreen ARM: dts: imx: b850v3: Disable unused usdhc4 ARM: dts: imx: b850v3: Define GPIO line names ARM: dts: imx: b850v3: Use alphabetical sorting ARM: dts: imx: bx50v3: Configure phy-mode to eliminate a warning ARM: dts: imx: bx50v3: Configure switch PHY max-speed to 100Mbps ARM: dts: imx7ulp: Add CPU clock and OPP table support ARM: dts: imx7-mba7: Deassert BOOT_EN after boot ARM: dts: tqma7: add boot phase properties ARM: dts: imx7s: add boot phase properties ARM: dts: tqma6ul[l]: correct spelling of TQ-Systems ARM: dts: mba6ulx: add boot phase properties ARM: dts: imx6ul[l]-tqma6ul[l]: add boot phase properties ARM: dts: imx6ul/imx6ull: add boot phase properties ARM: dts: imx6qdl-mba6: add boot phase properties ARM: dts: imx6qdl-tqma6: add boot phase properties ARM: dts: imx6qdl: add boot phase properties ...

Merge tag 'mm-nonmm-stable-2026-04-15-04-20' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-04-17T03:11:56Z

Pull non-MM updates from Andrew Morton: - "pid: make sub-init creation retryable" (Oleg Nesterov) Make creation of init in a new namespace more robust by clearing away some historical cruft which is no longer needed. Also some documentation fixups - "selftests/fchmodat2: Error handling and general" (Mark Brown) Fix and a cleanup for the fchmodat2() syscall selftest - "lib: polynomial: Move to math/ and clean up" (Andy Shevchenko) - "hung_task: Provide runtime reset interface for hung task detector" (Aaron Tomlin) Give administrators the ability to zero out /proc/sys/kernel/hung_task_detect_count - "tools/getdelays: use the static UAPI headers from tools/include/uapi" (Thomas Weißschuh) Teach getdelays to use the in-kernel UAPI headers rather than the system-provided ones - "watchdog/hardlockup: Improvements to hardlockup" (Mayank Rungta) Several cleanups and fixups to the hardlockup detector code and its documentation - "lib/bch: fix undefined behavior from signed left-shifts" (Josh Law) A couple of small/theoretical fixes in the bch code - "ocfs2/dlm: fix two bugs in dlm_match_regions()" (Junrui Luo) - "cleanup the RAID5 XOR library" (Christoph Hellwig) A quite far-reaching cleanup to this code. I can't do better than to quote Christoph: "The XOR library used for the RAID5 parity is a bit of a mess right now. The main file sits in crypto/ despite not being cryptography and not using the crypto API, with the generic implementations sitting in include/asm-generic and the arch implementations sitting in an asm/ header in theory. The latter doesn't work for many cases, so architectures often build the code directly into the core kernel, or create another module for the architecture code. Change this to a single module in lib/ that also contains the architecture optimizations, similar to the library work Eric Biggers has done for the CRC and crypto libraries later. After that it changes to better calling conventions that allow for smarter architecture implementations (although none is contained here yet), and uses static_call to avoid indirection function call overhead" - "lib/list_sort: Clean up list_sort() scheduling workarounds" (Kuan-Wei Chiu) Clean up this library code by removing a hacky thing which was added for UBIFS, which UBIFS doesn't actually need - "Fix bugs in extract_iter_to_sg()" (Christian Ehrhardt) Fix a few bugs in the scatterlist code, add in-kernel tests for the now-fixed bugs and fix a leak in the test itself - "kdump: Enable LUKS-encrypted dump target support in ARM64 and PowerPC" (Coiby Xu) Enable support of the LUKS-encrypted device dump target on arm64 and powerpc - "ocfs2: consolidate extent list validation into block read callbacks" (Joseph Qi) Cleanup, simplify, and make more robust ocfs2's validation of extent list fields (Kernel test robot loves mounting corrupted fs images!) * tag 'mm-nonmm-stable-2026-04-15-04-20' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (127 commits) ocfs2: validate group add input before caching ocfs2: validate bg_bits during freefrag scan ocfs2: fix listxattr handling when the buffer is full doc: watchdog: fix typos etc update Sean's email address ocfs2: use get_random_u32() where appropriate ocfs2: split transactions in dio completion to avoid credit exhaustion ocfs2: remove redundant l_next_free_rec check in __ocfs2_find_path() ocfs2: validate extent block list fields during block read ocfs2: remove empty extent list check in ocfs2_dx_dir_lookup_rec() ocfs2: validate dx_root extent list fields during block read ocfs2: fix use-after-free in ocfs2_fault() when VM_FAULT_RETRY ocfs2: handle invalid dinode in ocfs2_group_extend .get_maintainer.ignore: add Askar ocfs2: validate bg_list extent bounds in discontig groups checkpatch: exclude forward declarations of const structs tools/accounting: handle truncated taskstats netlink messages taskstats: set version in TGID exit notifications ocfs2/heartbeat: fix slot mapping rollback leaks on error paths arm64,ppc64le/kdump: pass dm-crypt keys to kdump kernel ...

bpf: Pass bpf_verifier_env to JIT

2026-04-16T14:03:40Z

Pass bpf_verifier_env to bpf_int_jit_compile(). The follow-up patch will use env->insn_aux_data in the JIT stage to detect indirect jump targets. Since bpf_prog_select_runtime() can be called by cbpf and lib/test_bpf.c code without verifier, introduce helper __bpf_prog_select_runtime() to accept the env parameter. Remove the call to bpf_prog_select_runtime() in bpf_prog_load(), and switch to call __bpf_prog_select_runtime() in the verifier, with env variable passed. The original bpf_prog_select_runtime() is preserved for cbpf and lib/test_bpf.c, where env is NULL. Now all constants blinding calls are moved into the verifier, except the cbpf and lib/test_bpf.c cases. The instructions arrays are adjusted by bpf_patch_insn_data() function for normal cases, so there is no need to call adjust_insn_arrays() in bpf_jit_blind_constants(). Remove it. Reviewed-by: Anton Protopopov # v8 Reviewed-by: Emil Tsalapatis # v12 Acked-by: Hengqi Chen # v14 Signed-off-by: Xu Kuohai Link: https://lore.kernel.org/r/20260416064341.151802-3-xukuohai@huaweicloud.com Signed-off-by: Alexei Starovoitov

bpf: Move constants blinding out of arch-specific JITs

2026-04-16T14:03:40Z

During the JIT stage, constants blinding rewrites instructions but only rewrites the private instruction copy of the JITed subprog, leaving the global env->prog->insnsi and env->insn_aux_data untouched. This causes a mismatch between subprog instructions and the global state, making it difficult to use the global data in the JIT. To avoid this mismatch, and given that all arch-specific JITs already support constants blinding, move it to the generic verifier code, and switch to rewrite the global env->prog->insnsi with the global states adjusted, as other rewrites in the verifier do. This removes the constants blinding calls in each JIT, which are largely duplicated code across architectures. Since constants blinding is only required for JIT, and there are two JIT entry functions, jit_subprogs() for BPF programs with multiple subprogs and bpf_prog_select_runtime() for programs with no subprogs, move the constants blinding invocation into these two functions. In the verifier path, bpf_patch_insn_data() is used to keep global verifier auxiliary data in sync with patched instructions. A key question is whether this global auxiliary data should be restored on the failure path. Besides instructions, bpf_patch_insn_data() adjusts: - prog->aux->poke_tab - env->insn_array_maps - env->subprog_info - env->insn_aux_data For prog->aux->poke_tab, it is only used by JIT or only meaningful after JIT succeeds, so it does not need to be restored on the failure path. For env->insn_array_maps, when JIT fails, programs using insn arrays are rejected by bpf_insn_array_ready() due to missing JIT addresses. Hence, env->insn_array_maps is only meaningful for JIT and does not need to be restored. For subprog_info, if jit_subprogs fails and CONFIG_BPF_JIT_ALWAYS_ON is not enabled, kernel falls back to interpreter. In this case, env->subprog_info is used to determine subprogram stack depth. So it must be restored on failure. For env->insn_aux_data, it is freed by clear_insn_aux_data() at the end of bpf_check(). Before freeing, clear_insn_aux_data() loops over env->insn_aux_data to release jump targets recorded in it. The loop uses env->prog->len as the array length, but this length no longer matches the actual size of the adjusted env->insn_aux_data array after constants blinding. To address it, a simple approach is to keep insn_aux_data as adjusted after failure, since it will be freed shortly, and record its actual size for the loop in clear_insn_aux_data(). But since clear_insn_aux_data() uses the same index to loop over both env->prog->insnsi and env->insn_aux_data, this approach results in incorrect index for the insnsi array. So an alternative approach is adopted: clone the original env->insn_aux_data before blinding and restore it after failure, similar to env->prog. For classic BPF programs, constants blinding works as before since it is still invoked from bpf_prog_select_runtime(). Reviewed-by: Anton Protopopov # v8 Reviewed-by: Hari Bathini # powerpc jit Reviewed-by: Pu Lehui # riscv jit Acked-by: Hengqi Chen # loongarch jit Signed-off-by: Xu Kuohai Link: https://lore.kernel.org/r/20260416064341.151802-2-xukuohai@huaweicloud.com Signed-off-by: Alexei Starovoitov

Merge tag 'mm-stable-2026-04-13-21-45' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-04-15T19:59:16Z

Pull MM updates from Andrew Morton: - "maple_tree: Replace big node with maple copy" (Liam Howlett) Mainly prepararatory work for ongoing development but it does reduce stack usage and is an improvement. - "mm, swap: swap table phase III: remove swap_map" (Kairui Song) Offers memory savings by removing the static swap_map. It also yields some CPU savings and implements several cleanups. - "mm: memfd_luo: preserve file seals" (Pratyush Yadav) File seal preservation to LUO's memfd code - "mm: zswap: add per-memcg stat for incompressible pages" (Jiayuan Chen) Additional userspace stats reportng to zswap - "arch, mm: consolidate empty_zero_page" (Mike Rapoport) Some cleanups for our handling of ZERO_PAGE() and zero_pfn - "mm/kmemleak: Improve scan_should_stop() implementation" (Zhongqiu Han) A robustness improvement and some cleanups in the kmemleak code - "Improve khugepaged scan logic" (Vernon Yang) Improve khugepaged scan logic and reduce CPU consumption by prioritizing scanning tasks that access memory frequently - "Make KHO Stateless" (Jason Miu) Simplify Kexec Handover by transitioning KHO from an xarray-based metadata tracking system with serialization to a radix tree data structure that can be passed directly to the next kernel - "mm: vmscan: add PID and cgroup ID to vmscan tracepoints" (Thomas Ballasi and Steven Rostedt) Enhance vmscan's tracepointing - "mm: arch/shstk: Common shadow stack mapping helper and VM_NOHUGEPAGE" (Catalin Marinas) Cleanup for the shadow stack code: remove per-arch code in favour of a generic implementation - "Fix KASAN support for KHO restored vmalloc regions" (Pasha Tatashin) Fix a WARN() which can be emitted the KHO restores a vmalloc area - "mm: Remove stray references to pagevec" (Tal Zussman) Several cleanups, mainly udpating references to "struct pagevec", which became folio_batch three years ago - "mm: Eliminate fake head pages from vmemmap optimization" (Kiryl Shutsemau) Simplify the HugeTLB vmemmap optimization (HVO) by changing how tail pages encode their relationship to the head page - "mm/damon/core: improve DAMOS quota efficiency for core layer filters" (SeongJae Park) Improve two problematic behaviors of DAMOS that makes it less efficient when core layer filters are used - "mm/damon: strictly respect min_nr_regions" (SeongJae Park) Improve DAMON usability by extending the treatment of the min_nr_regions user-settable parameter - "mm/page_alloc: pcp locking cleanup" (Vlastimil Babka) The proper fix for a previously hotfixed SMP=n issue. Code simplifications and cleanups ensued - "mm: cleanups around unmapping / zapping" (David Hildenbrand) A bunch of cleanups around unmapping and zapping. Mostly simplifications, code movements, documentation and renaming of zapping functions - "support batched checking of the young flag for MGLRU" (Baolin Wang) Batched checking of the young flag for MGLRU. It's part cleanups; one benchmark shows large performance benefits for arm64 - "memcg: obj stock and slab stat caching cleanups" (Johannes Weiner) memcg cleanup and robustness improvements - "Allow order zero pages in page reporting" (Yuvraj Sakshith) Enhance free page reporting - it is presently and undesirably order-0 pages when reporting free memory. - "mm: vma flag tweaks" (Lorenzo Stoakes) Cleanup work following from the recent conversion of the VMA flags to a bitmap - "mm/damon: add optional debugging-purpose sanity checks" (SeongJae Park) Add some more developer-facing debug checks into DAMON core - "mm/damon: test and document power-of-2 min_region_sz requirement" (SeongJae Park) An additional DAMON kunit test and makes some adjustments to the addr_unit parameter handling - "mm/damon/core: make passed_sample_intervals comparisons overflow-safe" (SeongJae Park) Fix a hard-to-hit time overflow issue in DAMON core - "mm/damon: improve/fixup/update ratio calculation, test and documentation" (SeongJae Park) A batch of misc/minor improvements and fixups for DAMON - "mm: move vma_(kernel|mmu)_pagesize() out of hugetlb.c" (David Hildenbrand) Fix a possible issue with dax-device when CONFIG_HUGETLB=n. Some code movement was required. - "zram: recompression cleanups and tweaks" (Sergey Senozhatsky) A somewhat random mix of fixups, recompression cleanups and improvements in the zram code - "mm/damon: support multiple goal-based quota tuning algorithms" (SeongJae Park) Extend DAMOS quotas goal auto-tuning to support multiple tuning algorithms that users can select - "mm: thp: reduce unnecessary start_stop_khugepaged()" (Breno Leitao) Fix the khugpaged sysfs handling so we no longer spam the logs with reams of junk when starting/stopping khugepaged - "mm: improve map count checks" (Lorenzo Stoakes) Provide some cleanups and slight fixes in the mremap, mmap and vma code - "mm/damon: support addr_unit on default monitoring targets for modules" (SeongJae Park) Extend the use of DAMON core's addr_unit tunable - "mm: khugepaged cleanups and mTHP prerequisites" (Nico Pache) Cleanups to khugepaged and is a base for Nico's planned khugepaged mTHP support - "mm: memory hot(un)plug and SPARSEMEM cleanups" (David Hildenbrand) Code movement and cleanups in the memhotplug and sparsemem code - "mm: remove CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE and cleanup CONFIG_MIGRATION" (David Hildenbrand) Rationalize some memhotplug Kconfig support - "change young flag check functions to return bool" (Baolin Wang) Cleanups to change all young flag check functions to return bool - "mm/damon/sysfs: fix memory leak and NULL dereference issues" (Josh Law and SeongJae Park) Fix a few potential DAMON bugs - "mm/vma: convert vm_flags_t to vma_flags_t in vma code" (Lorenzo Stoakes) Convert a lot of the existing use of the legacy vm_flags_t data type to the new vma_flags_t type which replaces it. Mainly in the vma code. - "mm: expand mmap_prepare functionality and usage" (Lorenzo Stoakes) Expand the mmap_prepare functionality, which is intended to replace the deprecated f_op->mmap hook which has been the source of bugs and security issues for some time. Cleanups, documentation, extension of mmap_prepare into filesystem drivers - "mm/huge_memory: refactor zap_huge_pmd()" (Lorenzo Stoakes) Simplify and clean up zap_huge_pmd(). Additional cleanups around vm_normal_folio_pmd() and the softleaf functionality are performed. * tag 'mm-stable-2026-04-13-21-45' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (369 commits) mm: fix deferred split queue races during migration mm/khugepaged: fix issue with tracking lock mm/huge_memory: add and use has_deposited_pgtable() mm/huge_memory: add and use normal_or_softleaf_folio_pmd() mm: add softleaf_is_valid_pmd_entry(), pmd_to_softleaf_folio() mm/huge_memory: separate out the folio part of zap_huge_pmd() mm/huge_memory: use mm instead of tlb->mm mm/huge_memory: remove unnecessary sanity checks mm/huge_memory: deduplicate zap deposited table call mm/huge_memory: remove unnecessary VM_BUG_ON_PAGE() mm/huge_memory: add a common exit path to zap_huge_pmd() mm/huge_memory: handle buggy PMD entry in zap_huge_pmd() mm/huge_memory: have zap_huge_pmd return a boolean, add kdoc mm/huge: avoid big else branch in zap_huge_pmd() mm/huge_memory: simplify vma_is_specal_huge() mm: on remap assert that input range within the proposed VMA mm: add mmap_action_map_kernel_pages[_full]() uio: replace deprecated mmap hook with mmap_prepare in uio_info drivers: hv: vmbus: replace deprecated mmap hook with mmap_prepare mm: allow handling of stacked mmap_prepare hooks in more drivers ...

bpf, riscv: Remove redundant bpf_flush_icache() after pack allocator finalize

2026-04-15T19:09:46Z

bpf_flush_icache() calls flush_icache_range() to clean the data cache and invalidate the instruction cache for the JITed code region. However, since commit 48a8f78c50bd ("bpf, riscv: use prog pack allocator in the BPF JIT"), this flush is redundant. bpf_jit_binary_pack_finalize() copies the JITed instructions to the ROX region via bpf_arch_text_copy() -> patch_text_nosync(), and patch_text_nosync() already calls flush_icache_range() on the written range. The subsequent bpf_flush_icache() repeats the same cache maintenance on an overlapping range. Remove the redundant bpf_flush_icache() call and its now-unused definition. Fixes: 48a8f78c50bd ("bpf, riscv: use prog pack allocator in the BPF JIT") Acked-by: Song Liu Signed-off-by: Puranjay Mohan Reviewed-by: Pu Lehui Tested-by: Paul Chaignon Link: https://lore.kernel.org/r/20260413191111.3426023-3-puranjay@kernel.org Signed-off-by: Alexei Starovoitov

Merge tag 'acpi-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

2026-04-14T02:25:07Z

Pull ACPI support updates from Rafael Wysocki: "These include an update of the CMOS RTC driver and the related ACPI and x86 code that, among other things, switches it over to using the platform device interface for device binding on x86 instead of the PNP device driver interface (which allows the code in question to be simplified quite a bit), a major update of the ACPI Time and Alarm Device (TAD) driver adding an RTC class device interface to it, and updates of core ACPI drivers that remove some unnecessary and not really useful code from them. Apart from that, two drivers are converted to using the platform driver interface for device binding instead of the ACPI driver one, which is slated for removal, support for the Performance Limited register is added to the ACPI CPPC library and there are some janitorial updates of it and the related cpufreq CPPC driver, the ACPI processor driver is fixed and cleaned up, and NVIDIA vendor CPER record handler is added to the APEI GHES code. Also, the interface for obtaining a CPU UID from ACPI is consolidated across architectures and used for fixing a problem with the PCI TPH Steering Tag on ARM64, there are two updates related to ACPICA, a minor ACPI OS Services Layer (OSL) update, and a few assorted updates related to ACPI tables parsing. Specifics: - Update maintainers information regarding ACPICA (Rafael Wysocki) - Replace strncpy() with strscpy_pad() in acpi_ut_safe_strncpy() (Kees Cook) - Trigger an ordered system power off after encountering a fatal error operator in AML (Armin Wolf) - Enable ACPI FPDT parsing on LoongArch (Xi Ruoyao) - Remove the temporary stop-gap acpi_pptt_cache_v1_full structure from the ACPI PPTT parser (Ben Horgan) - Add support for exposing ACPI FPDT subtables FBPT and S3PT (Nate DeSimone) - Address multiple assorted issues and clean up the code in the ACPI processor idle driver (Huisong Li) - Replace strlcat() in the ACPI processor idle drive with a better alternative (Andy Shevchenko) - Rearrange and clean up acpi_processor_errata_piix4() (Rafael Wysocki) - Move reference performance to capabilities and fix an uninitialized variable in the ACPI CPPC library (Pengjie Zhang) - Add support for the Performance Limited Register to the ACPI CPPC library (Sumit Gupta) - Add cppc_get_perf() API to read performance controls, extend cppc_set_epp_perf() for FFH/SystemMemory, and make the ACPI CPPC library warn on missing mandatory DESIRED_PERF register (Sumit Gupta) - Modify the cpufreq CPPC driver to update MIN_PERF/MAX_PERF in target callbacks to allow it to control performance bounds via standard scaling_min_freq and scaling_max_freq sysfs attributes and add sysfs documentation for the Performance Limited Register to it (Sumit Gupta) - Add ACPI support to the platform device interface in the CMOS RTC driver, make the ACPI core device enumeration code create a platform device for the CMOS RTC, and drop CMOS RTC PNP device support (Rafael Wysocki) - Consolidate the x86-specific CMOS RTC handling with the ACPI TAD driver and clean up the CMOS RTC ACPI address space handler (Rafael Wysocki) - Enable ACPI alarm in the CMOS RTC driver if advertised in ACPI FADT and allow that driver to work without a dedicated IRQ if the ACPI alarm is used (Rafael Wysocki) - Clean up the ACPI TAD driver in various ways and add an RTC class device interface, including both the RTC setting/reading and alarm timer support, to it (Rafael Wysocki) - Clean up the ACPI AC and ACPI PAD (processor aggregator device) drivers (Rafael Wysocki) - Rework checking for duplicate video bus devices and consolidate pnp.bus_id workarounds handling in the ACPI video bus driver (Rafael Wysocki) - Update the ACPI core device drivers to stop setting acpi_device_name() unnecessarily (Rafael Wysocki) - Rearrange code using acpi_device_class() in the ACPI core device drivers and update them to stop setting acpi_device_class() unnecessarily (Rafael Wysocki) - Define ACPI_AC_CLASS in one place (Rafael Wysocki) - Convert the ni903x_wdt watchdog driver and the xen ACPI PAD driver to bind to platform devices instead of ACPI devices (Rafael Wysocki) - Add devm_ghes_register_vendor_record_notifier(), use it in the PCI hisi driver, and Add NVIDIA vendor CPER record handler (Kai-Heng Feng) - Consolidate the interface for obtaining a CPU UID from ACPI across architectures and use it to address incorrect PCI TPH Steering Tag on ARM64 resulting from the invalid assumption that the ACPI Processor UID would always be the same as the corresponding logical CPU ID in Linux (Chengwen Feng)" * tag 'acpi-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (73 commits) ACPICA: Update maintainers information watchdog: ni903x_wdt: Convert to a platform driver ACPI: PAD: xen: Convert to a platform driver ACPI: processor: idle: Reset cpuidle on C-state list changes cpuidle: Extract and export no-lock variants of cpuidle_unregister_device() PCI/TPH: Pass ACPI Processor UID to Cache Locality _DSM ACPI: PPTT: Use acpi_get_cpu_uid() and remove get_acpi_id_for_cpu() perf: arm_cspmu: Switch to acpi_get_cpu_uid() from get_acpi_id_for_cpu() ACPI: Centralize acpi_get_cpu_uid() declaration in include/linux/acpi.h x86/acpi: Add acpi_get_cpu_uid() for unified ACPI CPU UID retrieval RISC-V: ACPI: Add acpi_get_cpu_uid() for unified ACPI CPU UID retrieval LoongArch: Add acpi_get_cpu_uid() for unified ACPI CPU UID retrieval arm64: acpi: Add acpi_get_cpu_uid() for unified ACPI CPU UID retrieval ACPI: APEI: GHES: Add NVIDIA vendor CPER record handler PCI: hisi: Use devm_ghes_register_vendor_record_notifier() ACPI: APEI: GHES: Add devm_ghes_register_vendor_record_notifier() ACPI: tables: Enable FPDT on LoongArch ACPI: processor: idle: Fix NULL pointer dereference in hotplug path ACPI: processor: idle: Reset power_setup_done flag on initialization failure ACPI: TAD: Add alarm support to the RTC class device interface ...

Merge tag 'hardening-v7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

2026-04-14T00:52:29Z

Pull hardening updates from Kees Cook: - randomize_kstack: Improve implementation across arches (Ryan Roberts) - lkdtm/fortify: Drop unneeded FORTIFY_STR_OBJECT test - refcount: Remove unused __signed_wrap function annotations * tag 'hardening-v7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: lkdtm/fortify: Drop unneeded FORTIFY_STR_OBJECT test refcount: Remove unused __signed_wrap function annotations randomize_kstack: Unify random source across arches randomize_kstack: Maintain kstack_offset per task