kernel/git/next/linux-next.git/arch/arm64/include/asm, branch master

Merge branch 'headers' of git://git.infradead.org/users/willy/pagecache.git

2026-09-15T16:54:27+00:00

# Conflicts: # net/ceph/osd_client.c

Merge branch 'next' of https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git

2026-09-15T16:37:21+00:00

Merge branch 'master' of https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git

2026-09-15T16:37:05+00:00

Merge branch 'for-next' of https://git.kernel.org/pub/scm/linux/kernel/git/mm/linux.git

2026-09-15T13:06:55+00:00

Merge branch into tip/master: 'sched/core'

2026-09-15T07:23:48+00:00

# New commits in sched/core: e81ee0630837 ("sched/fair: Reset NUMA fault locality after scan period update") ef9293b3b797 ("sched: dynamic: Fix preemption model strings") 879eaa76e608 ("sched: Remove unneeded function type cast in do_balance_callbacks()") f549101187c8 ("sched/deadline: check start_dl_timer expiry with ktime_before()") 2a672daa4b27 ("sched/feat: Use the new static key API for sched_feat") a5576ebce920 ("sched: Convert paravirt_steal to new static key APIs") 9650ce11f2e3 ("sched: dynamic: Simplify preempt model accessors") 5b9a28eeed37 ("sched: dynamic: Remove HAVE_PREEMPT_DYNAMIC_{CALL,KEY}") aa4178f63847 ("sched: dynamic: Simplify irqentry_exit_cond_resched()") b9d267b9d632 ("sched: dynamic: Simplify preempt_schedule{,_notrace}()") 88e0b3bb9930 ("sched: dynamic: Simplify {cond,might}_resched()") d3d16750693b ("sched: dynamic: Make PREEMPT_DYNAMIC depend on ARCH_HAS_PREEMPT_LAZY") 772d9ffbfd26 ("sched: Migrate whole chain in proxy_migrate_task()") 6b73a09e943f ("sched: Break out core of attach_tasks() helper into sched.h") 1f8805138593 ("sched: Switch rq->next_class in proxy_reset_donor()") 09351db90a28 ("sched/core: Don't proxy-exec unmatched cookie lock owners") 9be817f991e2 ("sched/core: Avoid migrating blocked_on tasks") 3dd95f077371 ("sched/core: Don't steal a proxy-exec donor") Signed-off-by: Ingo Molnar

Merge branch kvm-arm64/hyp-type-checking-7.4 into kvmarm-master/next

2026-09-14T10:52:09+00:00

* kvm-arm64/hyp-type-checking-7.4: : \ : Restore some sanity in the EL2 department by enforcing the type : checking that was lost when converting the KVM internal : interface to SMCCC. Patches courtesy of Fuad Tabba. : : From the cover letter: : : "This series implements that, in plain preprocessor macros rather than : an external generator, in the mold of the syscall wrappers. Each : hypercall's signature is declared once, in kvm_hcall.h: : kvm_call_hyp_nvhe() resolves to a typed nvhe_hvc_##f() stub generated : from the declaration, and the hyp-main.c handlers unmarshal their : arguments through glue that is type-checked against the same : declaration. A mistyped or stale call, or a handler that drifts from : its caller, now fails to compile. On top of that shared declaration, : host-VA parameters gain a __kern sparse address space, so : dereferencing one at EL2 without kern_hyp_va_host() translation is : flagged by sparse. The address space is KVM-private and lives with the : interface it annotates rather than in compiler_types.h, like x86's : __seg_gs in asm/percpu.h. The deeper instances of that bug class, host : VAs reached through struct fields after the boundary, are follow-up : work." : / KVM: arm64: Tag host-VA hypercall parameters __kern KVM: arm64: nVHE: Check hypercall handlers against the declared ABI KVM: arm64: Type-check hypercall arguments at the caller KVM: arm64: Move the host hypercall interface to its own header KVM: arm64: nVHE: Pass host VA arguments as pointers arm64: pi: Run the source checker on the libfdt objects under C=2 KVM: arm64: nVHE: Run the source checker under C=2 KVM: arm64: nVHE: Use NULL to reset the trace buffer backing pointer KVM: arm64: nVHE: Declare the hyp event IDs before defining them KVM: arm64: nVHE: Share the stacktrace per-CPU declarations with EL2 tracing: Include linux/types.h in trace_remote_event.h Signed-off-by: Marc Zyngier

KVM: arm64: Tag host-VA hypercall parameters __kern

2026-09-14T10:26:51+00:00

The nVHE hypervisor takes host virtual addresses as hypercall arguments and translates each with kern_hyp_va() before use. Nothing marks them as host-owned, so dereferencing one untranslated at EL2 - a recurring bug class - is invisible to the compiler. Add a __kern sparse address space, active only for EL2 code, and tag the host-VA parameters in the hypercall declarations. kern_hyp_va_host() is the only sanctioned unwrap: it translates the address, preserves the pointee type (stripped of qualifiers, as with the percpu accessors) and drops the tag with a __force cast, so an untranslated host VA fails sparse. The tag flows from the shared declaration into the generated handler and on into the donated-memory and tracing-descriptor helpers, so a handler cannot extract a host VA without it. Host code sees plain pointers, and the tag is checker-only: no code is generated. container_of() casts through void * and drops the address space, so __get_host_hyp_vcpus() now takes an already translated vCPU and its callers unwrap. Translating a vgic_v3_cpu_if before taking its container is equivalent, since va_mask spans every bit in which two linear-map addresses differ. Reviewed-by: Marc Zyngier Signed-off-by: Fuad Tabba Link: https://patch.msgid.link/20260901140326.3812068-12-fuad.tabba@linux.dev Signed-off-by: Marc Zyngier

KVM: arm64: nVHE: Check hypercall handlers against the declared ABI

2026-09-14T10:26:51+00:00

Each hypercall handler unmarshals its arguments from the host context with hand-written DECLARE_REG() casts that nothing ties to what the caller passed: a handler can disagree with its caller in argument type, count or register index without a diagnostic. Generate the unmarshalling instead. DEFINE_KVM_HOST_HCALL() expands to the handle_() glue, modelled on the syscall wrappers, and checks the handler's parameter list against the signature declared in kvm_hcall.h, so both ends of every hypercall are now compiled against the same declaration. Handler bodies keep their logic and lose the DECLARE_REG() and return-register boilerplate. The two get_host_hyp_vcpus() macros existed only to wrap DECLARE_REG(), so one is dropped and the other becomes a function. The compiled handlers are instruction-for-instruction identical, apart from flush_hyp_vcpu() and sync_hyp_vcpu() now being inlined into their only caller. The return-register store is picked by the declared return type, so a void handler needs no macro of its own. The type is pasted into the store's name, which has to be a single word, so __pkvm_create_private_mapping is declared ulong. Assisted-by: Antigravity:gemini-3.1-pro Reviewed-by: Marc Zyngier Signed-off-by: Fuad Tabba Link: https://patch.msgid.link/20260901140326.3812068-11-fuad.tabba@linux.dev Signed-off-by: Marc Zyngier

KVM: arm64: Type-check hypercall arguments at the caller

2026-09-14T10:26:51+00:00

kvm_call_hyp_nvhe() reduces its target to an SMCCC function number, so the compiler never sees a callable: arguments that are wrong in number, type or order are silently marshalled into registers. The kvm_call_hyp() wrappers only catch this on the VHE branch, and the pKVM-only hypercalls have no such branch. Declare each hypercall's signature once in kvm_hcall.h and generate a typed stub from it, in the mold of the syscall wrappers. Make kvm_call_hyp_nvhe() resolve to the stub so every caller is checked against the declared signature; a stale or mistyped call now fails to compile. The stubs inline to the same SMCCC call the untyped macro used to make: the compiled callers are unchanged, apart from hypercall returns now being tested at their declared width. The stage-2 protection arguments are declared u64 rather than enum kvm_pgtable_prot, as kvm_pgtable.h includes linux/kvm_host.h and the enum cannot be completed here. Assisted-by: Antigravity:gemini-3.1-pro Reviewed-by: Marc Zyngier Signed-off-by: Fuad Tabba Link: https://patch.msgid.link/20260901140326.3812068-10-fuad.tabba@linux.dev Signed-off-by: Marc Zyngier

KVM: arm64: Move the host hypercall interface to its own header

2026-09-14T10:26:50+00:00

Move the kvm_call_hyp() dispatch macros and pkvm_handle_t out of kvm_host.h into a new kvm_hcall.h, giving the host<->hyp hypercall interface a single home that subsequent patches build on to restore type-checking across the boundary. The only adjustment to the moved code is the checkpatch-mandated space in "while (0)". No functional change intended. Reviewed-by: Marc Zyngier Signed-off-by: Fuad Tabba Link: https://patch.msgid.link/20260901140326.3812068-9-fuad.tabba@linux.dev Signed-off-by: Marc Zyngier