Linus, The following changes since commit e9f17038d814c0185e017a3fa62305a12d52f45c: x86/tdx: mark tdh_vp_enter() as __flatten (2025-05-26 16:45:07 -0400) are available in the Git repository at: https://git.kernel.org/pub/scm/virt/kvm/kvm.git tags/for-linus for you to fetch changes up to 61374cc145f4a56377eaf87c7409a97ec7a34041: Merge tag 'kvmarm-fixes-6.16-1' of https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD (2025-06-02 03:05:29 -0400) ---------------------------------------------------------------- Generic: * Clean up locking of all vCPUs for a VM by using the *_nest_lock() family of functions, and move duplicated code to virt/kvm/. kernel/ patches acked by Peter Zijlstra. * Add MGLRU support to the access tracking perf test. ARM fixes: * Make the irqbypass hooks resilient to changes in the GSI<->MSI routing, avoiding behind stale vLPI mappings being left behind. The fix is to resolve the VGIC IRQ using the host IRQ (which is stable) and nuking the vLPI mapping upon a routing change. * Close another VGIC race where vCPU creation races with VGIC creation, leading to in-flight vCPUs entering the kernel w/o private IRQs allocated. * Fix a build issue triggered by the recently added workaround for Ampere's AC04_CPU_23 erratum. * Correctly sign-extend the VA when emulating a TLBI instruction potentially targeting a VNCR mapping. * Avoid dereferencing a NULL pointer in the VGIC debug code, which can happen if the device doesn't have any mapping yet. s390: * Fix interaction between some filesystems and Secure Execution * Some cleanups and refactorings, preparing for an upcoming big series x86: * Wait for target vCPU to acknowledge KVM_REQ_UPDATE_PROTECTED_GUEST_STATE to fix a race between AP destroy and VMRUN. * Decrypt and dump the VMSA in dump_vmcb() if debugging enabled for the VM. * Refine and harden handling of spurious faults. * Add support for ALLOWED_SEV_FEATURES. * Add #VMGEXIT to the set of handlers special cased for CONFIG_RETPOLINE=y. * Treat DEBUGCTL[5:2] as reserved to pave the way for virtualizing features that utilize those bits. * Don't account temporary allocations in sev_send_update_data(). * Add support for KVM_CAP_X86_BUS_LOCK_EXIT on SVM, via Bus Lock Threshold. * Unify virtualization of IBRS on nested VM-Exit, and cross-vCPU IBPB, between SVM and VMX. * Advertise support to userspace for WRMSRNS and PREFETCHI. * Rescan I/O APIC routes after handling EOI that needed to be intercepted due to the old/previous routing, but not the new/current routing. * Add a module param to control and enumerate support for device posted interrupts. * Fix a potential overflow with nested virt on Intel systems running 32-bit kernels. * Flush shadow VMCSes on emergency reboot. * Add support for SNP to the various SEV selftests. * Add a selftest to verify fastops instructions via forced emulation. * Refine and optimize KVM's software processing of the posted interrupt bitmap, and share the harvesting code between KVM and the kernel's Posted MSI handler ---------------------------------------------------------------- Babu Moger (1): KVM: x86: Advertise support for AMD's PREFETCHI Borislav Petkov (1): KVM: x86: Sort CPUID_8000_0021_EAX leaf bits properly Chao Gao (1): KVM: VMX: Flush shadow VMCS on emergency reboot Claudio Imbrenda (4): s390: Remove unneeded includes KVM: s390: Remove unneeded srcu lock KVM: s390: Refactor and split some gmap helpers KVM: s390: Simplify and move pv code Dan Carpenter (1): KVM: x86: clean up a return David Hildenbrand (3): s390/uv: Don't return 0 from make_hva_secure() if the operation was not successful s390/uv: Always return 0 from s390_wiggle_split_folio() if successful s390/uv: Improve splitting of large folios that cannot be split while dirty Edward Adam Davis (1): KVM: VMX: use __always_inline for is_td_vcpu and is_td James Houghton (3): cgroup: selftests: Move cgroup_util into its own library KVM: selftests: Build and link selftests/cgroup/lib into KVM selftests KVM: selftests: access_tracking_perf_test: Use MGLRU for access tracking Kim Phillips (1): KVM: SEV: Configure "ALLOWED_SEV_FEATURES" VMCB Field Kishon Vijay Abraham I (1): x86/cpufeatures: Add "Allowed SEV Features" Feature Li RongQing (1): KVM: Remove obsolete comment about locking for kvm_io_bus_read/write Manali Shukla (3): KVM: x86: Make kvm_pio_request.linear_rip a common field for user exits x86/cpufeatures: Add CPUID feature bit for the Bus Lock Threshold KVM: SVM: Add support for KVM_CAP_X86_BUS_LOCK_EXIT on SVM CPUs Marc Zyngier (3): arm64: sysreg: Drag linux/kconfig.h to work around vdso build issue KVM: arm64: Mask out non-VA bits from TLBI VA* on VNCR invalidation KVM: arm64: vgic-debug: Avoid dereferencing NULL ITE pointer Maxim Levitsky (7): KVM: selftests: access_tracking_perf_test: Add option to skip the sanity check locking/mutex: implement mutex_trylock_nested locking/mutex: implement mutex_lock_killable_nest_lock KVM: add kvm_lock_all_vcpus and kvm_trylock_all_vcpus x86: KVM: SVM: use kvm_lock_all_vcpus instead of a custom implementation KVM: arm64: use kvm_trylock_all_vcpus when locking all vCPUs RISC-V: KVM: use kvm_trylock_all_vcpus when locking all vCPUs Nikunj A Dadhania (2): KVM: SVM: Add architectural definitions/assets for Bus Lock Threshold KVM: selftests: Add test to verify KVM_CAP_X86_BUS_LOCK_EXIT Oliver Upton (5): KVM: arm64: Use lock guard in vgic_v4_set_forwarding() KVM: arm64: Protect vLPI translation with vgic_irq::irq_lock KVM: arm64: Resolve vLPI by host IRQ in vgic_v4_unset_forwarding() KVM: arm64: Unmap vLPIs affected by changes to GSI routing information KVM: arm64: vgic-init: Plug vCPU vs. VGIC creation race Paolo Bonzini (11): Merge tag 'kvm-x86-misc-6.16' of https://github.com/kvm-x86/linux into HEAD Merge tag 'kvm-x86-mmu-6.16' of https://github.com/kvm-x86/linux into HEAD Merge tag 'kvm-x86-pir-6.16' of https://github.com/kvm-x86/linux into HEAD Merge tag 'kvm-x86-selftests-6.16' of https://github.com/kvm-x86/linux into HEAD Merge tag 'kvm-x86-vmx-6.16' of https://github.com/kvm-x86/linux into HEAD Merge tag 'kvm-x86-svm-6.16' of https://github.com/kvm-x86/linux into HEAD rust: add helper for mutex_trylock Merge branch 'kvm-lockdep-common' into HEAD Merge tag 'kvm-s390-next-6.16-1' of https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD rtmutex_api: provide correct extern functions Merge tag 'kvmarm-fixes-6.16-1' of https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD Peng Hao (2): KVM: SVM: avoid frequency indirect calls x86/sev: Remove unnecessary GFP_KERNEL_ACCOUNT for temporary variables Pratik R. Sampat (9): KVM: selftests: SEV-SNP test for KVM_SEV_INIT2 KVM: selftests: Add vmgexit helper KVM: selftests: Add SMT control state helper KVM: selftests: Replace assert() with TEST_ASSERT_EQ() KVM: selftests: Introduce SEV VM type check KVM: selftests: Add library support for interacting with SNP KVM: selftests: Force GUEST_MEMFD flag for SNP VM type KVM: selftests: Decouple SEV policy from VM type KVM: selftests: Add a basic SEV-SNP smoke test Sean Christopherson (23): x86/msr: Rename the WRMSRNS opcode macro to ASM_WRMSRNS (for KVM) KVM: x86: Advertise support for WRMSRNS KVM: x86: Isolate edge vs. level check in userspace I/O APIC route scanning KVM: x86: Add a helper to deduplicate I/O APIC EOI interception logic KVM: VMX: Don't send UNBLOCK when starting device assignment without APICv KVM: x86: Add module param to control and enumerate device posted IRQs x86/irq: Ensure initial PIR loads are performed exactly once x86/irq: Track if IRQ was found in PIR during initial loop (to load PIR vals) KVM: VMX: Ensure vIRR isn't reloaded at odd times when sync'ing PIR x86/irq: KVM: Track PIR bitmap as an "unsigned long" array KVM: VMX: Process PIR using 64-bit accesses on 64-bit kernels KVM: VMX: Isolate pure loads from atomic XCHG when processing PIR KVM: VMX: Use arch_xchg() when processing PIR to avoid instrumentation x86/irq: KVM: Add helper for harvesting PIR to deduplicate KVM and posted MSIs KVM: nVMX: Check MSR load/store list counts during VM-Enter consistency checks KVM: SVM: Treat DEBUGCTL[5:2] as reserved KVM: x86: Unify cross-vCPU IBPB KVM: x86: Revert kvm_x86_ops.mem_enc_ioctl() back to an OPTIONAL hook KVM: selftests: Add a test for x86's fastops emulation KVM: selftests: Extract guts of THP accessor to standalone sysfs helpers cgroup: selftests: Move memcontrol specific helpers out of common cgroup_util.c cgroup: selftests: Add API to find root of specific controller KVM: x86/mmu: Use kvm_x86_call() instead of manual static_call() Tom Lendacky (6): KVM: SVM: Fix SNP AP destroy race with VMRUN KVM: SVM: Decrypt SEV VMSA in dump_vmcb() if debugging is enabled KVM: SVM: Dump guest register state in dump_vmcb() KVM: SVM: Add the type of VM for which the VMCB/VMSA is being dumped KVM: SVM: Include the vCPU ID when dumping a VMCB KVM: SVM: Add a mutex to dump_vmcb() to prevent concurrent output Uros Bizjak (1): KVM: VMX: Use LEAVE in vmx_do_interrupt_irqoff() Vishal Verma (3): KVM: VMX: Move vt_apicv_pre_state_restore() to posted_intr.c and tweak name KVM: VMX: Define a VMX glue macro for kvm_complete_insn_gp() KVM: VMX: Clean up and macrofy x86_ops Yan Zhao (4): KVM: x86/mmu: Further check old SPTE is leaf for spurious prefetch fault KVM: x86/tdp_mmu: Merge prefetch and access checks for spurious faults KVM: x86/tdp_mmu: WARN if PFN changes for spurious faults KVM: x86/mmu: Warn if PFN changes on shadow-present SPTE in shadow MMU Yosry Ahmed (4): x86/cpufeatures: Define X86_FEATURE_AMD_IBRS_SAME_MODE KVM: x86: Propagate AMD's IbrsSameMode to the guest KVM: x86: Generalize IBRS virtualization on emulated VM-exit KVM: SVM: Clear current_vmcb during vCPU free for all *possible* CPUs weizijie (1): KVM: x86: Rescan I/O APIC routes after EOI interception for old routing Documentation/virt/kvm/api.rst | 5 + MAINTAINERS | 2 + arch/arm64/include/asm/kvm_host.h | 3 - arch/arm64/include/asm/sysreg.h | 1 + arch/arm64/kvm/arch_timer.c | 4 +- arch/arm64/kvm/arm.c | 69 ++-- arch/arm64/kvm/nested.c | 6 +- arch/arm64/kvm/vgic/vgic-debug.c | 5 +- arch/arm64/kvm/vgic/vgic-init.c | 31 +- arch/arm64/kvm/vgic/vgic-its.c | 56 +-- arch/arm64/kvm/vgic/vgic-kvm-device.c | 12 +- arch/arm64/kvm/vgic/vgic-v4.c | 92 ++--- arch/riscv/kvm/aia_device.c | 34 +- arch/s390/include/asm/gmap.h | 2 - arch/s390/include/asm/gmap_helpers.h | 15 + arch/s390/include/asm/tlb.h | 1 + arch/s390/include/asm/uv.h | 1 - arch/s390/kernel/uv.c | 97 +++++- arch/s390/kvm/Makefile | 2 +- arch/s390/kvm/diag.c | 30 +- arch/s390/kvm/gaccess.c | 3 +- arch/s390/kvm/gmap-vsie.c | 1 - arch/s390/kvm/gmap.c | 121 ------- arch/s390/kvm/gmap.h | 39 --- arch/s390/kvm/intercept.c | 9 +- arch/s390/kvm/kvm-s390.c | 10 +- arch/s390/kvm/kvm-s390.h | 42 +++ arch/s390/kvm/priv.c | 6 +- arch/s390/kvm/pv.c | 61 +++- arch/s390/kvm/vsie.c | 19 +- arch/s390/mm/Makefile | 2 + arch/s390/mm/fault.c | 1 - arch/s390/mm/gmap.c | 185 +--------- arch/s390/mm/gmap_helpers.c | 221 ++++++++++++ arch/s390/mm/init.c | 1 - arch/s390/mm/pgalloc.c | 2 - arch/s390/mm/pgtable.c | 1 - arch/x86/include/asm/cpufeatures.h | 4 + arch/x86/include/asm/kvm-x86-ops.h | 2 +- arch/x86/include/asm/kvm_host.h | 9 +- arch/x86/include/asm/msr.h | 4 +- arch/x86/include/asm/posted_intr.h | 78 ++++- arch/x86/include/asm/svm.h | 10 +- arch/x86/include/uapi/asm/kvm.h | 1 + arch/x86/include/uapi/asm/svm.h | 2 + arch/x86/kernel/irq.c | 63 +--- arch/x86/kvm/cpuid.c | 8 +- arch/x86/kvm/ioapic.c | 7 +- arch/x86/kvm/ioapic.h | 2 + arch/x86/kvm/irq_comm.c | 37 +- arch/x86/kvm/lapic.c | 28 +- arch/x86/kvm/lapic.h | 4 +- arch/x86/kvm/mmu/mmu.c | 5 +- arch/x86/kvm/mmu/tdp_mmu.c | 19 +- arch/x86/kvm/svm/nested.c | 36 ++ arch/x86/kvm/svm/sev.c | 185 ++++++---- arch/x86/kvm/svm/svm.c | 162 +++++++-- arch/x86/kvm/svm/svm.h | 14 +- arch/x86/kvm/vmx/common.h | 4 +- arch/x86/kvm/vmx/main.c | 202 ++++++----- arch/x86/kvm/vmx/nested.c | 48 +-- arch/x86/kvm/vmx/posted_intr.c | 17 +- arch/x86/kvm/vmx/posted_intr.h | 5 +- arch/x86/kvm/vmx/vmenter.S | 3 +- arch/x86/kvm/vmx/vmx.c | 23 +- arch/x86/kvm/vmx/vmx.h | 3 +- arch/x86/kvm/vmx/x86_ops.h | 66 +--- arch/x86/kvm/x86.c | 44 ++- arch/x86/kvm/x86.h | 18 + include/kvm/arm_vgic.h | 3 +- include/linux/kvm_host.h | 23 +- include/linux/mutex.h | 32 +- kernel/locking/mutex.c | 21 +- kernel/locking/rtmutex_api.c | 33 +- rust/helpers/mutex.c | 5 + tools/arch/x86/include/asm/cpufeatures.h | 1 + tools/arch/x86/include/uapi/asm/kvm.h | 1 + tools/testing/selftests/cgroup/Makefile | 21 +- .../selftests/cgroup/{ => lib}/cgroup_util.c | 118 ++----- .../cgroup/{ => lib/include}/cgroup_util.h | 13 +- tools/testing/selftests/cgroup/lib/libcgroup.mk | 19 + tools/testing/selftests/cgroup/test_memcontrol.c | 78 +++++ tools/testing/selftests/kvm/Makefile.kvm | 6 +- .../selftests/kvm/access_tracking_perf_test.c | 281 +++++++++++++-- tools/testing/selftests/kvm/include/kvm_util.h | 35 ++ tools/testing/selftests/kvm/include/lru_gen_util.h | 51 +++ tools/testing/selftests/kvm/include/test_util.h | 1 + .../testing/selftests/kvm/include/x86/processor.h | 1 + tools/testing/selftests/kvm/include/x86/sev.h | 53 ++- tools/testing/selftests/kvm/lib/kvm_util.c | 21 +- tools/testing/selftests/kvm/lib/lru_gen_util.c | 387 +++++++++++++++++++++ tools/testing/selftests/kvm/lib/test_util.c | 46 ++- tools/testing/selftests/kvm/lib/x86/processor.c | 4 +- tools/testing/selftests/kvm/lib/x86/sev.c | 76 +++- tools/testing/selftests/kvm/x86/fastops_test.c | 165 +++++++++ tools/testing/selftests/kvm/x86/hyperv_cpuid.c | 21 +- tools/testing/selftests/kvm/x86/kvm_buslock_test.c | 135 +++++++ tools/testing/selftests/kvm/x86/sev_init2_tests.c | 13 + tools/testing/selftests/kvm/x86/sev_smoke_test.c | 75 ++-- virt/kvm/kvm_main.c | 81 ++++- 100 files changed, 2883 insertions(+), 1242 deletions(-) create mode 100644 arch/s390/include/asm/gmap_helpers.h delete mode 100644 arch/s390/kvm/gmap.c delete mode 100644 arch/s390/kvm/gmap.h create mode 100644 arch/s390/mm/gmap_helpers.c rename tools/testing/selftests/cgroup/{ => lib}/cgroup_util.c (88%) rename tools/testing/selftests/cgroup/{ => lib/include}/cgroup_util.h (91%) create mode 100644 tools/testing/selftests/cgroup/lib/libcgroup.mk create mode 100644 tools/testing/selftests/kvm/include/lru_gen_util.h create mode 100644 tools/testing/selftests/kvm/lib/lru_gen_util.c create mode 100644 tools/testing/selftests/kvm/x86/fastops_test.c create mode 100644 tools/testing/selftests/kvm/x86/kvm_buslock_test.c
