Changes in Kconfig

8457669db968c98edb781892d73fa559e1efcbd4 - Merge tag 'asoc-fix-v7.0-rc2' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

Thu, 05 Mar 2026 17:22:14 +0100

Merge tag 'asoc-fix-v7.0-rc2' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linusASoC: Fixes for v7.0A moderately large pile of fixes, though none of them are super major,plus a few new quirks and device IDs. List of files: /linux/arch/s390/kvm/Kconfig

949d0a46ad1b9ab3450fb6ed69ff1e3e13c657bd - Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Mon, 02 Mar 2026 00:34:47 +0100

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmPull kvm fixes from Paolo Bonzini: "Arm: - Make sure we don't leak any S1POE state from guest to guest when the feature is supported on the HW, but not enabled on the host - Propagate the ID registers from the host into non-protected VMs managed by pKVM, ensuring that the guest sees the intended feature set - Drop double kern_hyp_va() from unpin_host_sve_state(), which could bite us if we were to change kern_hyp_va() to not being idempotent - Don't leak stage-2 mappings in protected mode - Correctly align the faulting address when dealing with single page stage-2 mappings for PAGE_SIZE > 4kB - Fix detection of virtualisation-capable GICv5 IRS, due to the maintainer being obviously fat fingered... [his words, not mine] - Remove duplication of code retrieving the ASID for the purpose of S1 PT handling - Fix slightly abusive const-ification in vgic_set_kvm_info() Generic: - Remove internal Kconfigs that are now set on all architectures - Remove per-architecture code to enable KVM_CAP_SYNC_MMU, all architectures finally enable it in Linux 7.0"* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: always define KVM_CAP_SYNC_MMU KVM: remove CONFIG_KVM_GENERIC_MMU_NOTIFIER KVM: arm64: Deduplicate ASID retrieval code irqchip/gic-v5: Fix inversion of IRS_IDR0.virt flag KVM: arm64: Revert accidental drop of kvm_uninit_stage2_mmu() for non-NV VMs KVM: arm64: Fix protected mode handling of pages larger than 4kB KVM: arm64: vgic: Handle const qualifier from gic_kvm_info allocation type KVM: arm64: Remove redundant kern_hyp_va() in unpin_host_sve_state() KVM: arm64: Fix ID register initialization for non-protected pKVM guests KVM: arm64: Optimise away S1POE handling when not supported by host KVM: arm64: Hide S1POE from guests when not supported by the host List of files: /linux/arch/s390/kvm/Kconfig

407fd8b8d8cce03856aa67329715de48b254b529 - KVM: remove CONFIG_KVM_GENERIC_MMU_NOTIFIER

Wed, 11 Feb 2026 19:03:03 +0100

KVM: remove CONFIG_KVM_GENERIC_MMU_NOTIFIERAll architectures now use MMU notifier for KVM page table management.Remove the Kconfig symbol and the code that is used when it isdisabled.Signed-off-by: Paolo Bonzini List of files: /linux/arch/s390/kvm/Kconfig

c17ee635fd3a482b2ad2bf5e269755c2eae5f25e - Merge drm/drm-fixes into drm-misc-fixes

Mon, 23 Feb 2026 10:09:45 +0100

Merge drm/drm-fixes into drm-misc-fixes7.0-rc1 was just released, let's merge it to kick the new release cycle.Signed-off-by: Maxime Ripard List of files: /linux/arch/s390/kvm/Kconfig

cb5573868ea85ddbc74dd9a917acd1e434d21390 - Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Fri, 13 Feb 2026 20:31:15 +0100

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmPull KVM updates from Paolo Bonzini: "Loongarch: - Add more CPUCFG mask bits - Improve feature detection - Add lazy load support for FPU and binary translation (LBT) register state - Fix return value for memory reads from and writes to in-kernel devices - Add support for detecting preemption from within a guest - Add KVM steal time test case to tools/selftests ARM: - Add support for FEAT_IDST, allowing ID registers that are not implemented to be reported as a normal trap rather than as an UNDEF exception - Add sanitisation of the VTCR_EL2 register, fixing a number of UXN/PXN/XN bugs in the process - Full handling of RESx bits, instead of only RES0, and resulting in SCTLR_EL2 being added to the list of sanitised registers - More pKVM fixes for features that are not supposed to be exposed to guests - Make sure that MTE being disabled on the pKVM host doesn't give it the ability to attack the hypervisor - Allow pKVM's host stage-2 mappings to use the Force Write Back version of the memory attributes by using the "pass-through' encoding - Fix trapping of ICC_DIR_EL1 on GICv5 hosts emulating GICv3 for the guest - Preliminary work for guest GICv5 support - A bunch of debugfs fixes, removing pointless custom iterators stored in guest data structures - A small set of FPSIMD cleanups - Selftest fixes addressing the incorrect alignment of page allocation - Other assorted low-impact fixes and spelling fixes RISC-V: - Fixes for issues discoverd by KVM API fuzzing in kvm_riscv_aia_imsic_has_attr(), kvm_riscv_aia_imsic_rw_attr(), and kvm_riscv_vcpu_aia_imsic_update() - Allow Zalasr, Zilsd and Zclsd extensions for Guest/VM - Transparent huge page support for hypervisor page tables - Adjust the number of available guest irq files based on MMIO register sizes found in the device tree or the ACPI tables - Add RISC-V specific paging modes to KVM selftests - Detect paging mode at runtime for selftests s390: - Performance improvement for vSIE (aka nested virtualization) - Completely new memory management. s390 was a special snowflake that enlisted help from the architecture's page table management to build hypervisor page tables, in particular enabling sharing the last level of page tables. This however was a lot of code (~3K lines) in order to support KVM, and also blocked several features. The biggest advantages is that the page size of userspace is completely independent of the page size used by the guest: userspace can mix normal pages, THPs and hugetlbfs as it sees fit, and in fact transparent hugepages were not possible before. It's also now possible to have nested guests and guests with huge pages running on the same host - Maintainership change for s390 vfio-pci - Small quality of life improvement for protected guests x86: - Add support for giving the guest full ownership of PMU hardware (contexted switched around the fastpath run loop) and allowing direct access to data MSRs and PMCs (restricted by the vPMU model). KVM still intercepts access to control registers, e.g. to enforce event filtering and to prevent the guest from profiling sensitive host state. This is more accurate, since it has no risk of contention and thus dropped events, and also has significantly less overhead. For more information, see the commit message for merge commit bf2c3138ae36 ("Merge tag 'kvm-x86-pmu-6.20' ...") - Disallow changing the virtual CPU model if L2 is active, for all the same reasons KVM disallows change the model after the first KVM_RUN - Fix a bug where KVM would incorrectly reject host accesses to PV MSRs when running with KVM_CAP_ENFORCE_PV_FEATURE_CPUID enabled, even if those were advertised as supported to userspace, - Fix a bug with protected guest state (SEV-ES/SNP and TDX) VMs, where KVM would attempt to read CR3 configuring an async #PF entry - Fail the build if EXPORT_SYMBOL_GPL or EXPORT_SYMBOL is used in KVM (for x86 only) to enforce usage of EXPORT_SYMBOL_FOR_KVM_INTERNAL. Only a few exports that are intended for external usage, and those are allowed explicitly - When checking nested events after a vCPU is unblocked, ignore -EBUSY instead of WARNing. Userspace can sometimes put the vCPU into what should be an impossible state, and spurious exit to userspace on -EBUSY does not really do anything to solve the issue - Also throw in the towel and drop the WARN on INIT/SIPI being blocked when vCPU is in Wait-For-SIPI, which also resulted in playing whack-a-mole with syzkaller stuffing architecturally impossible states into KVM - Add support for new Intel instructions that don't require anything beyond enumerating feature flags to userspace - Grab SRCU when reading PDPTRs in KVM_GET_SREGS2 - Add WARNs to guard against modifying KVM's CPU caps outside of the intended setup flow, as nested VMX in particular is sensitive to unexpected changes in KVM's golden configuration - Add a quirk to allow userspace to opt-in to actually suppress EOI broadcasts when the suppression feature is enabled by the guest (currently limited to split IRQCHIP, i.e. userspace I/O APIC). Sadly, simply fixing KVM to honor Suppress EOI Broadcasts isn't an option as some userspaces have come to rely on KVM's buggy behavior (KVM advertises Supress EOI Broadcast irrespective of whether or not userspace I/O APIC supports Directed EOIs) - Clean up KVM's handling of marking mapped vCPU pages dirty - Drop a pile of *ancient* sanity checks hidden behind in KVM's unused ASSERT() macro, most of which could be trivially triggered by the guest and/or user, and all of which were useless - Fold "struct dest_map" into its sole user, "struct rtc_status", to make it more obvious what the weird parameter is used for, and to allow fropping these RTC shenanigans if CONFIG_KVM_IOAPIC=n - Bury all of ioapic.h, i8254.h and related ioctls (including KVM_CREATE_IRQCHIP) behind CONFIG_KVM_IOAPIC=y - Add a regression test for recent APICv update fixes - Handle "hardware APIC ISR", a.k.a. SVI, updates in kvm_apic_update_apicv() to consolidate the updates, and to co-locate SVI updates with the updates for KVM's own cache of ISR information - Drop a dead function declaration - Minor cleanups x86 (Intel): - Rework KVM's handling of VMCS updates while L2 is active to temporarily switch to vmcs01 instead of deferring the update until the next nested VM-Exit. The deferred updates approach directly contributed to several bugs, was proving to be a maintenance burden due to the difficulty in auditing the correctness of deferred updates, and was polluting "struct nested_vmx" with a growing pile of booleans - Fix an SGX bug where KVM would incorrectly try to handle EPCM page faults, and instead always reflect them into the guest. Since KVM doesn't shadow EPCM entries, EPCM violations cannot be due to KVM interference and can't be resolved by KVM - Fix a bug where KVM would register its posted interrupt wakeup handler even if loading kvm-intel.ko ultimately failed - Disallow access to vmcb12 fields that aren't fully supported, mostly to avoid weirdness and complexity for FRED and other features, where KVM wants enable VMCS shadowing for fields that conditionally exist - Print out the "bad" offsets and values if kvm-intel.ko refuses to load (or refuses to online a CPU) due to a VMCS config mismatch x86 (AMD): - Drop a user-triggerable WARN on nested_svm_load_cr3() failure - Add support for virtualizing ERAPS. Note, correct virtualization of ERAPS relies on an upcoming, publicly announced change in the APM to reduce the set of conditions where hardware (i.e. KVM) *must* flush the RAP - Ignore nSVM intercepts for instructions that are not supported according to L1's virtual CPU model - Add support for expedited writes to the fast MMIO bus, a la VMX's fastpath for EPT Misconfig - Don't set GIF when clearing EFER.SVME, as GIF exists independently of SVM, and allow userspace to restore nested state with GIF=0 - Treat exit_code as an unsigned 64-bit value through all of KVM - Add support for fetching SNP certificates from userspace - Fix a bug where KVM would use vmcb02 instead of vmcb01 when emulating VMLOAD or VMSAVE on behalf of L2 - Misc fixes and cleanups x86 selftests: - Add a regression test for TPR<=>CR8 synchronization and IRQ masking - Overhaul selftest's MMU infrastructure to genericize stage-2 MMU support, and extend x86's infrastructure to support EPT and NPT (for L2 guests) - Extend several nested VMX tests to also cover nested SVM - Add a selftest for nested VMLOAD/VMSAVE - Rework the nested dirty log test, originally added as a regression test for PML where KVM logged L2 GPAs instead of L1 GPAs, to improve test coverage and to hopefully make the test easier to understand and maintain guest_memfd: - Remove kvm_gmem_populate()'s preparation tracking and half-baked hugepage handling. SEV/SNP was the only user of the tracking and it can do it via the RMP - Retroactively document and enforce (for SNP) that KVM_SEV_SNP_LAUNCH_UPDATE and KVM_TDX_INIT_MEM_REGION require the source page to be 4KiB aligned, to avoid non-trivial complexity for something that no known VMM seems to be doing and to avoid an API special case for in-place conversion, which simply can't support unaligned sources - When populating guest_memfd memory, GUP the source page in common code and pass the refcounted page to the vendor callback, instead of letting vendor code do the heavy lifting. Doing so avoids a looming deadlock bug with in-place due an AB-BA conflict betwee mmap_lock and guest_memfd's filemap invalidate lock Generic: - Fix a bug where KVM would ignore the vCPU's selected address space when creating a vCPU-specific mapping of guest memory. Actually this bug could not be hit even on x86, the only architecture with multiple address spaces, but it's a bug nevertheless"* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (267 commits) KVM: s390: Increase permitted SE header size to 1 MiB MAINTAINERS: Replace backup for s390 vfio-pci KVM: s390: vsie: Fix race in acquire_gmap_shadow() KVM: s390: vsie: Fix race in walk_guest_tables() KVM: s390: Use guest address to mark guest page dirty irqchip/riscv-imsic: Adjust the number of available guest irq files RISC-V: KVM: Transparent huge page support RISC-V: KVM: selftests: Add Zalasr extensions to get-reg-list test RISC-V: KVM: Allow Zalasr extensions for Guest/VM KVM: riscv: selftests: Add riscv vm satp modes KVM: riscv: selftests: add Zilsd and Zclsd extension to get-reg-list test riscv: KVM: allow Zilsd and Zclsd extensions for Guest/VM RISC-V: KVM: Skip IMSIC update if vCPU IMSIC state is not initialized RISC-V: KVM: Fix null pointer dereference in kvm_riscv_aia_imsic_rw_attr() RISC-V: KVM: Fix null pointer dereference in kvm_riscv_aia_imsic_has_attr() RISC-V: KVM: Remove unnecessary 'ret' assignment KVM: s390: Add explicit padding to struct kvm_s390_keyop KVM: LoongArch: selftests: Add steal time test case LoongArch: KVM: Add paravirt vcpu_is_preempted() support in guest side LoongArch: KVM: Add paravirt preempt feature in hypervisor side ... List of files: /linux/arch/s390/kvm/Kconfig

b1195183ed42f1522fae3fe44ebee3af437aa000 - Merge tag 'kvm-s390-next-7.0-1' of https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD

Wed, 11 Feb 2026 18:52:27 +0100

Merge tag 'kvm-s390-next-7.0-1' of https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD- gmap rewrite: completely new memory management for kvm/s390- vSIE improvement- maintainership change for s390 vfio-pci- small quality of life improvement for protected guests List of files: /linux/arch/s390/kvm/Kconfig

ec496f77b4c11036cc835d6f045fb5e5ef1e6530 - Merge branch 'for-6.20/sony' into for-linus

Mon, 09 Feb 2026 17:33:26 +0100

Merge branch 'for-6.20/sony' into for-linus- Support for Rock band 4 PS4 and PS5 guitars (Rosalie Wanders) List of files: /linux/arch/s390/kvm/Kconfig

a2f2798fa6d18d91766b19a4896bd9fd0654d730 - KVM: s390: Enable KVM_GENERIC_MMU_NOTIFIER

Wed, 04 Feb 2026 16:02:39 +0100

KVM: s390: Enable KVM_GENERIC_MMU_NOTIFIEREnable KVM_GENERIC_MMU_NOTIFIER, for now with empty placeholder callbacks.Also enable KVM_MMU_LOCKLESS_AGING and define KVM_HAVE_MMU_RWLOCK.Acked-by: Christian Borntraeger Reviewed-by: Steffen Eiden Reviewed-by: Christoph Schlameuss Acked-by: Heiko Carstens Signed-off-by: Claudio Imbrenda List of files: /linux/arch/s390/kvm/Kconfig

cc4adab164b772a34b3340d644b7c4728498581e - Merge tag 'v6.19-rc1' into msm-next

Tue, 20 Jan 2026 23:06:55 +0100

Merge tag 'v6.19-rc1' into msm-nextMerge Linux 6.19-rc1 in order to catch up with other changes (e.g. UBWCconfig database defining UBWC_6).Signed-off-by: Dmitry Baryshkov List of files: /linux/arch/s390/kvm/Kconfig

5add3c3c280a35f7e258e9cef7607db5a2e56fdc - Merge drm/drm-next into drm-xe-next

Fri, 19 Dec 2025 11:51:22 +0100

Merge drm/drm-next into drm-xe-nextBackmerging to bring in 6.19-rc1. An important upstream bugfix andto help unblock PTL CI.Signed-off-by: Thomas Hellström List of files: /linux/arch/s390/kvm/Kconfig

ec439c38013550420aecc15988ae6acb670838c1 - Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf after 6.19-rc1

Wed, 17 Dec 2025 06:29:38 +0100

Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf after 6.19-rc1Cross-merge BPF and other fixes after downstream PR.Signed-off-by: Alexei Starovoitov List of files: /linux/arch/s390/kvm/Kconfig

b8304863a3990d0f18c38e5b94191830a63ee1af - Merge drm/drm-next into drm-intel-next

Mon, 15 Dec 2025 14:24:02 +0100

Merge drm/drm-next into drm-intel-nextSync-up some display code needed for Async flips refactor.Signed-off-by: Rodrigo Vivi List of files: /linux/arch/s390/kvm/Kconfig

7f790dd21a931c61167f7bdc327aecf2cebad327 - Merge drm/drm-next into drm-misc-next

Mon, 15 Dec 2025 09:27:39 +0100

Merge drm/drm-next into drm-misc-nextLet's kickstart the v6.20 (7.0?) release cycle.Signed-off-by: Maxime Ripard List of files: /linux/arch/s390/kvm/Kconfig

24f171c7e145f43b9f187578e89b0982ce87e54c - Merge tag 'asoc-fix-v6.19-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

Sun, 21 Dec 2025 11:11:11 +0100

Merge tag 'asoc-fix-v6.19-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linusASoC: Fixes for v6.19We've been quite busy with fixes since the merge window, though not inany particularly exciting ways - the standout thing is the fix for _SXcontrols which were broken by a change to how we do clamping, otherwiseit's all fairly run of the mill fixes and quirks. List of files: /linux/arch/s390/kvm/Kconfig

84318277d6334c6981ab326d4acc87c6a6ddc9b8 - Merge remote-tracking branch 'drm/drm-fixes' into drm-misc-fixes

Mon, 15 Dec 2025 12:53:27 +0100

Merge remote-tracking branch 'drm/drm-fixes' into drm-misc-fixesPull in rc1 to include all changes since the merge window closed,and grab all fixes and changes from drm/drm-next.Signed-off-by: Maarten Lankhorst List of files: /linux/arch/s390/kvm/Kconfig

51d90a15fedf8366cb96ef68d0ea2d0bf15417d2 - Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Sat, 06 Dec 2025 02:01:20 +0100

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmPull KVM updates from Paolo Bonzini: "ARM: - Support for userspace handling of synchronous external aborts (SEAs), allowing the VMM to potentially handle the abort in a non-fatal manner - Large rework of the VGIC's list register handling with the goal of supporting more active/pending IRQs than available list registers in hardware. In addition, the VGIC now supports EOImode==1 style deactivations for IRQs which may occur on a separate vCPU than the one that acked the IRQ - Support for FEAT_XNX (user / privileged execute permissions) and FEAT_HAF (hardware update to the Access Flag) in the software page table walkers and shadow MMU - Allow page table destruction to reschedule, fixing long need_resched latencies observed when destroying a large VM - Minor fixes to KVM and selftests Loongarch: - Get VM PMU capability from HW GCFG register - Add AVEC basic support - Use 64-bit register definition for EIOINTC - Add KVM timer test cases for tools/selftests RISC/V: - SBI message passing (MPXY) support for KVM guest - Give a new, more specific error subcode for the case when in-kernel AIA virtualization fails to allocate IMSIC VS-file - Support KVM_DIRTY_LOG_INITIALLY_SET, enabling dirty log gradually in small chunks - Fix guest page fault within HLV* instructions - Flush VS-stage TLB after VCPU migration for Andes cores s390: - Always allocate ESCA (Extended System Control Area), instead of starting with the basic SCA and converting to ESCA with the addition of the 65th vCPU. The price is increased number of exits (and worse performance) on z10 and earlier processor; ESCA was introduced by z114/z196 in 2010 - VIRT_XFER_TO_GUEST_WORK support - Operation exception forwarding support - Cleanups x86: - Skip the costly "zap all SPTEs" on an MMIO generation wrap if MMIO SPTE caching is disabled, as there can't be any relevant SPTEs to zap - Relocate a misplaced export - Fix an async #PF bug where KVM would clear the completion queue when the guest transitioned in and out of paging mode, e.g. when handling an SMI and then returning to paged mode via RSM - Leave KVM's user-return notifier registered even when disabling virtualization, as long as kvm.ko is loaded. On reboot/shutdown, keeping the notifier registered is ok; the kernel does not use the MSRs and the callback will run cleanly and restore host MSRs if the CPU manages to return to userspace before the system goes down - Use the checked version of {get,put}_user() - Fix a long-lurking bug where KVM's lack of catch-up logic for periodic APIC timers can result in a hard lockup in the host - Revert the periodic kvmclock sync logic now that KVM doesn't use a clocksource that's subject to NTP corrections - Clean up KVM's handling of MMIO Stale Data and L1TF, and bury the latter behind CONFIG_CPU_MITIGATIONS - Context switch XCR0, XSS, and PKRU outside of the entry/exit fast path; the only reason they were handled in the fast path was to paper of a bug in the core #MC code, and that has long since been fixed - Add emulator support for AVX MOV instructions, to play nice with emulated devices whose guest drivers like to access PCI BARs with large multi-byte instructions x86 (AMD): - Fix a few missing "VMCB dirty" bugs - Fix the worst of KVM's lack of EFER.LMSLE emulation - Add AVIC support for addressing 4k vCPUs in x2AVIC mode - Fix incorrect handling of selective CR0 writes when checking intercepts during emulation of L2 instructions - Fix a currently-benign bug where KVM would clobber SPEC_CTRL[63:32] on VMRUN and #VMEXIT - Fix a bug where KVM corrupt the guest code stream when re-injecting a soft interrupt if the guest patched the underlying code after the VM-Exit, e.g. when Linux patches code with a temporary INT3 - Add KVM_X86_SNP_POLICY_BITS to advertise supported SNP policy bits to userspace, and extend KVM "support" to all policy bits that don't require any actual support from KVM x86 (Intel): - Use the root role from kvm_mmu_page to construct EPTPs instead of the current vCPU state, partly as worthwhile cleanup, but mostly to pave the way for tracking per-root TLB flushes, and elide EPT flushes on pCPU migration if the root is clean from a previous flush - Add a few missing nested consistency checks - Rip out support for doing "early" consistency checks via hardware as the functionality hasn't been used in years and is no longer useful in general; replace it with an off-by-default module param to WARN if hardware fails a check that KVM does not perform - Fix a currently-benign bug where KVM would drop the guest's SPEC_CTRL[63:32] on VM-Enter - Misc cleanups - Overhaul the TDX code to address systemic races where KVM (acting on behalf of userspace) could inadvertantly trigger lock contention in the TDX-Module; KVM was either working around these in weird, ugly ways, or was simply oblivious to them (though even Yan's devilish selftests could only break individual VMs, not the host kernel) - Fix a bug where KVM could corrupt a vCPU's cpu_list when freeing a TDX vCPU, if creating said vCPU failed partway through - Fix a few sparse warnings (bad annotation, 0 != NULL) - Use struct_size() to simplify copying TDX capabilities to userspace - Fix a bug where TDX would effectively corrupt user-return MSR values if the TDX Module rejects VP.ENTER and thus doesn't clobber host MSRs as expected Selftests: - Fix a math goof in mmu_stress_test when running on a single-CPU system/VM - Forcefully override ARCH from x86_64 to x86 to play nice with specifying ARCH=x86_64 on the command line - Extend a bunch of nested VMX to validate nested SVM as well - Add support for LA57 in the core VM_MODE_xxx macro, and add a test to verify KVM can save/restore nested VMX state when L1 is using 5-level paging, but L2 is not - Clean up the guest paging code in anticipation of sharing the core logic for nested EPT and nested NPT guest_memfd: - Add NUMA mempolicy support for guest_memfd, and clean up a variety of rough edges in guest_memfd along the way - Define a CLASS to automatically handle get+put when grabbing a guest_memfd from a memslot to make it harder to leak references - Enhance KVM selftests to make it easer to develop and debug selftests like those added for guest_memfd NUMA support, e.g. where test and/or KVM bugs often result in hard-to-debug SIGBUS errors - Misc cleanups Generic: - Use the recently-added WQ_PERCPU when creating the per-CPU workqueue for irqfd cleanup - Fix a goof in the dirty ring documentation - Fix choice of target for directed yield across different calls to kvm_vcpu_on_spin(); the function was always starting from the first vCPU instead of continuing the round-robin search"* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (260 commits) KVM: arm64: at: Update AF on software walk only if VM has FEAT_HAFDBS KVM: arm64: at: Use correct HA bit in TCR_EL2 when regime is EL2 KVM: arm64: Document KVM_PGTABLE_PROT_{UX,PX} KVM: arm64: Fix spelling mistake "Unexpeced" -> "Unexpected" KVM: arm64: Add break to default case in kvm_pgtable_stage2_pte_prot() KVM: arm64: Add endian casting to kvm_swap_s[12]_desc() KVM: arm64: Fix compilation when CONFIG_ARM64_USE_LSE_ATOMICS=n KVM: arm64: selftests: Add test for AT emulation KVM: arm64: nv: Expose hardware access flag management to NV guests KVM: arm64: nv: Implement HW access flag management in stage-2 SW PTW KVM: arm64: Implement HW access flag management in stage-1 SW PTW KVM: arm64: Propagate PTW errors up to AT emulation KVM: arm64: Add helper for swapping guest descriptor KVM: arm64: nv: Use pgtable definitions in stage-2 walk KVM: arm64: Handle endianness in read helper for emulated PTW KVM: arm64: nv: Stop passing vCPU through void ptr in S2 PTW KVM: arm64: Call helper for reading descriptors directly KVM: arm64: nv: Advertise support for FEAT_XNX KVM: arm64: Teach ptdump about FEAT_XNX permissions KVM: s390: Use generic VIRT_XFER_TO_GUEST_WORK functions ... List of files: /linux/arch/s390/kvm/Kconfig

e0c26d47def7382d7dbd9cad58bc653aed75737a - Merge tag 'kvm-s390-next-6.19-1' of https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD

Tue, 02 Dec 2025 18:58:47 +0100

Merge tag 'kvm-s390-next-6.19-1' of https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD- SCA rework- VIRT_XFER_TO_GUEST_WORK support- Operation exception forwarding support- Cleanups List of files: /linux/arch/s390/kvm/Kconfig

2bd1337a1295e012e60008ee21a64375e5234e12 - KVM: s390: Use generic VIRT_XFER_TO_GUEST_WORK functions

Wed, 26 Nov 2025 06:33:12 +0100

KVM: s390: Use generic VIRT_XFER_TO_GUEST_WORK functionsSwitch to using the generic infrastructure to check for and handle pendingwork before transitioning into guest mode.xfer_to_guest_mode_handle_work() does a few more things than the currentcode does when deciding whether or not to exit the __vcpu_run() loop. Theexittime tests from kvm-unit-tests, in my tests, were within a few percentcompared to before this series, which is within noise tolerance.Co-developed-by: Heiko Carstens Signed-off-by: Heiko Carstens Signed-off-by: Andrew Donnellan Acked-by: Janosch Frank [frankja@linux.ibm.com: Removed semicolon]Signed-off-by: Janosch Frank List of files: /linux/arch/s390/kvm/Kconfig

de8e8ebb1a7c5e2243fdb0409418484501e3b9b2 - Merge tag 'kvm-x86-tdx-6.19' of https://github.com/kvm-x86/linux into HEAD

Wed, 26 Nov 2025 09:36:37 +0100

Merge tag 'kvm-x86-tdx-6.19' of https://github.com/kvm-x86/linux into HEADKVM TDX changes for 6.19: - Overhaul the TDX code to address systemic races where KVM (acting on behalf of userspace) could inadvertantly trigger lock contention in the TDX-Module, which KVM was either working around in weird, ugly ways, or was simply oblivious to (as proven by Yan tripping several KVM_BUG_ON()s with clever selftests). - Fix a bug where KVM could corrupt a vCPU's cpu_list when freeing a vCPU if creating said vCPU failed partway through. - Fix a few sparse warnings (bad annotation, 0 != NULL). - Use struct_size() to simplify copying capabilities to userspace. List of files: /linux/arch/s390/kvm/Kconfig

0a0da3f92118950862700497bc7917f0fbf6a6e8 - KVM: Make support for kvm_arch_vcpu_async_ioctl() mandatory

Thu, 30 Oct 2025 21:09:24 +0100

KVM: Make support for kvm_arch_vcpu_async_ioctl() mandatoryImplement kvm_arch_vcpu_async_ioctl() "natively" in x86 and arm64 insteadof relying on an #ifdef'd stub, and drop HAVE_KVM_VCPU_ASYNC_IOCTL inanticipation of using the API on x86. Once x86 uses the API, providing astub for one architecture and having all other architectures opt-inrequires more code than simply implementing the API in the lone holdout.Eliminating the Kconfig will also reduce churn if the API is renamed inthe future (spoiler alert).No functional change intended.Acked-by: Claudio Imbrenda Reviewed-by: Yan Zhao Tested-by: Yan Zhao Tested-by: Kai Huang Link: https://patch.msgid.link/20251030200951.3402865-2-seanjc@google.comSigned-off-by: Sean Christopherson List of files: /linux/arch/s390/kvm/Kconfig