* [GIT PULL] KVM fixes for Linux 7.0-rc4
@ 2026-03-15 6:57 Paolo Bonzini
2026-03-15 20:52 ` pr-tracker-bot
0 siblings, 1 reply; 2+ messages in thread
From: Paolo Bonzini @ 2026-03-15 6:57 UTC (permalink / raw)
To: torvalds; +Cc: linux-kernel, kvm
Linus,
The following changes since commit 11439c4635edd669ae435eec308f4ab8a0804808:
Linux 7.0-rc2 (2026-03-01 15:39:31 -0800)
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 d2ea4ff1ce50787a98a3900b3fb1636f3620b7cf:
KVM: selftests: Verify SEV+ guests can read and write EFER, CR0, CR4, and CR8 (2026-03-12 17:31:53 +0100)
Quite a large pull request, partly due to skipping last week
and therefore having material from ~all submaintainers in this
one. About a fourth of it is a new selftest, and a couple more
changes are large in number of files touched (fixing a
-Wflex-array-member-not-at-end compiler warning) or lines changed
(reformatting of a table in the API documentation, thanks rST).
But who am I kidding---it's a lot of commits and there are a lot
of bugs being fixed here, some of them on the nastier side like
the RISC-V ones.
Thanks,
Paolo
----------------------------------------------------------------
ARM:
- Correctly handle deeactivation of interrupts that were activated from
LRs. Since EOIcount only denotes deactivation of interrupts that
are not present in an LR, start EOIcount deactivation walk *after*
the last irq that made it into an LR.
- Avoid calling into the stubs to probe for ICH_VTR_EL2.TDS when
pKVM is already enabled -- not only thhis isn't possible (pKVM
will reject the call), but it is also useless: this can only
happen for a CPU that has already booted once, and the capability
will not change.
- Fix a couple of low-severity bugs in our S2 fault handling path,
affecting the recently introduced LS64 handling and the even more
esoteric handling of hwpoison in a nested context
- Address yet another syzkaller finding in the vgic initialisation,
where we would end-up destroying an uninitialised vgic with nasty
consequences
- Address an annoying case of pKVM failing to boot when some of the
memblock regions that the host is faulting in are not page-aligned
- Inject some sanity in the NV stage-2 walker by checking the limits
against the advertised PA size, and correctly report the resulting
faults
PPC:
- Fix a PPC e500 build error due to a long-standing wart that was exposed by
the recent conversion to kmalloc_obj(); rip out all the ugliness that
led to the wart.
RISC-V:
- Prevent speculative out-of-bounds access using array_index_nospec()
in APLIC interrupt handling, ONE_REG regiser access, AIA CSR access,
float register access, and PMU counter access
- Fix potential use-after-free issues in kvm_riscv_gstage_get_leaf(),
kvm_riscv_aia_aplic_has_attr(), and kvm_riscv_aia_imsic_has_attr()
- Fix potential null pointer dereference in kvm_riscv_vcpu_aia_rmw_topei()
- Fix off-by-one array access in SBI PMU
- Skip THP support check during dirty logging
- Fix error code returned for Smstateen and Ssaia ONE_REG interface
- Check host Ssaia extension when creating AIA irqchip
x86:
- Fix cases where CPUID mitigation features were incorrectly marked as
available whenever the kernel used scattered feature words for them.
- Validate _all_ GVAs, rather than just the first GVA, when processing
a range of GVAs for Hyper-V's TLB flush hypercalls.
- Fix a brown paper bug in add_atomic_switch_msr().
- Use hlist_for_each_entry_srcu() when traversing mask_notifier_list,
to fix a lockdep warning; KVM doesn't hold RCU, just irq_srcu.
- Ensure AVIC VMCB fields are initialized if the VM has an in-kernel local
APIC (and AVIC is enabled at the module level).
- Update CR8 write interception when AVIC is (de)activated, to fix a bug
where the guest can run in perpetuity with the CR8 intercept enabled.
- Add a quirk to skip the consistency check on FREEZE_IN_SMM, i.e. to allow
L1 hypervisors to set FREEZE_IN_SMM. This reverts (by default) an
unintentional tightening of userspace ABI in 6.17, and provides some
amount of backwards compatibility with hypervisors who want to freeze
PMCs on VM-Entry.
- Validate the VMCS/VMCB on return to a nested guest from SMM, because
either userspace or the guest could stash invalid values in memory
and trigger the processor's consistency checks.
Generic:
- Remove a subtle pseudo-overlay of kvm_stats_desc, which, aside from being
unnecessary and confusing, triggered compiler warnings due to
-Wflex-array-member-not-at-end.
- Document that vcpu->mutex is take outside of kvm->slots_lock and
kvm->slots_arch_lock, which is intentional and desirable despite being
rather unintuitive.
Selftests:
- Increase the maximum number of NUMA nodes in the guest_memfd selftest to
64 (from 8).
----------------------------------------------------------------
Anup Patel (3):
RISC-V: KVM: Fix error code returned for Smstateen ONE_REG
RISC-V: KVM: Fix error code returned for Ssaia ONE_REG
RISC-V: KVM: Check host Ssaia extension when creating AIA irqchip
Carlos López (1):
KVM: x86: synthesize CPUID bits only if CPU capability is set
Fuad Tabba (2):
KVM: arm64: Fix page leak in user_mem_abort() on atomic fault
KVM: arm64: Fix vma_shift staleness on nested hwpoison path
Jiakai Xu (4):
RISC-V: KVM: Fix use-after-free in kvm_riscv_gstage_get_leaf()
RISC-V: KVM: Fix null pointer dereference in kvm_riscv_vcpu_aia_rmw_topei()
RISC-V: KVM: Fix use-after-free in kvm_riscv_aia_aplic_has_attr()
RISC-V: KVM: Fix potential UAF in kvm_riscv_aia_imsic_has_attr()
Jim Mattson (1):
KVM: x86: Introduce KVM_X86_QUIRK_VMCS12_ALLOW_FREEZE_IN_SMM
Kai Huang (1):
KVM: selftests: Increase 'maxnode' for guest_memfd tests
Li RongQing (1):
KVM: x86: Fix SRCU list traversal in kvm_fire_mask_notifiers()
Lukas Gerlach (5):
KVM: riscv: Fix Spectre-v1 in APLIC interrupt handling
KVM: riscv: Fix Spectre-v1 in ONE_REG register access
KVM: riscv: Fix Spectre-v1 in AIA CSR access
KVM: riscv: Fix Spectre-v1 in floating-point register access
KVM: riscv: Fix Spectre-v1 in PMU counter access
Manuel Andreas (1):
KVM: x86: hyper-v: Validate all GVAs during PV TLB flush
Marc Zyngier (4):
KVM: arm64: Eagerly init vgic dist/redist on vgic creation
KVM: arm64: pkvm: Fallback to level-3 mapping on host stage-2 fault
KVM: arm64: vgic: Pick EOIcount deactivations from AP-list tail
KVM: arm64: pkvm: Don't reprobe for ICH_VTR_EL2.TDS on CPU hotplug
Namhyung Kim (1):
KVM: VMX: Fix a wrong MSR update in add_atomic_switch_msr()
Paolo Bonzini (10):
Merge tag 'kvmarm-fixes-7.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
Merge tag 'kvm-riscv-fixes-7.0-1' of https://github.com/kvm-riscv/linux into HEAD
Merge tag 'kvm-x86-generic-7.0-rc3' of https://github.com/kvm-x86/linux into HEAD
Merge tag 'kvmarm-fixes-7.0-3' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM: VMX: check validity of VMCS controls when returning from SMM
KVM: SVM: check validity of VMCB controls when returning from SMM
selftests: kvm: extract common functionality out of smm_test.c
selftests: kvm: add a test that VMX validates controls on RSM
KVM: x86: clarify leave_smm() return value
Documentation: kvm: fix formatting of the quirks table
Radim Krčmář (1):
RISC-V: KVM: fix off-by-one array access in SBI PMU
Sean Christopherson (7):
KVM: Remove subtle "struct kvm_stats_desc" pseudo-overlay
Documentation: KVM: Formalizing taking vcpu->mutex *outside* of kvm->slots_lock
KVM: PPC: e500: Fix build error due to using kmalloc_obj() with wrong type
KVM: PPC: e500: Rip out "struct tlbe_ref"
KVM: SVM: Initialize AVIC VMCB fields if AVIC is enabled with in-kernel APIC
KVM: SVM: Set/clear CR8 write interception when AVIC is (de)activated
KVM: selftests: Verify SEV+ guests can read and write EFER, CR0, CR4, and CR8
Wang Yechao (1):
RISC-V: KVM: Skip THP support check during dirty logging
Zenghui Yu (Huawei) (4):
KVM: arm64: nv: Check S2 limits based on implemented PA size
KVM: arm64: nv: Report addrsz fault at level 0 with a bad VTTBR.BADDR
KVM: arm64: nv: Inject a SEA if failed to read the descriptor
KVM: arm64: Remove the redundant ISB in __kvm_at_s1e2()
Documentation/virt/kvm/api.rst | 206 +++++++++++----------
Documentation/virt/kvm/locking.rst | 2 +
arch/arm64/include/asm/kvm_host.h | 3 +
arch/arm64/kernel/cpufeature.c | 9 +
arch/arm64/kvm/at.c | 2 -
arch/arm64/kvm/guest.c | 4 +-
arch/arm64/kvm/hyp/nvhe/mem_protect.c | 2 +-
arch/arm64/kvm/mmu.c | 14 +-
arch/arm64/kvm/nested.c | 27 +--
arch/arm64/kvm/vgic/vgic-init.c | 34 ++--
arch/arm64/kvm/vgic/vgic-v2.c | 4 +-
arch/arm64/kvm/vgic/vgic-v3.c | 12 +-
arch/arm64/kvm/vgic/vgic.c | 6 +
arch/loongarch/kvm/vcpu.c | 2 +-
arch/loongarch/kvm/vm.c | 2 +-
arch/mips/kvm/mips.c | 4 +-
arch/powerpc/kvm/book3s.c | 4 +-
arch/powerpc/kvm/booke.c | 4 +-
arch/powerpc/kvm/e500.h | 6 +-
arch/powerpc/kvm/e500_mmu.c | 4 +-
arch/powerpc/kvm/e500_mmu_host.c | 91 +++++----
arch/riscv/kvm/aia.c | 15 +-
arch/riscv/kvm/aia_aplic.c | 23 +--
arch/riscv/kvm/aia_device.c | 18 +-
arch/riscv/kvm/aia_imsic.c | 4 +
arch/riscv/kvm/mmu.c | 6 +-
arch/riscv/kvm/vcpu.c | 2 +-
arch/riscv/kvm/vcpu_fp.c | 17 +-
arch/riscv/kvm/vcpu_onereg.c | 54 ++++--
arch/riscv/kvm/vcpu_pmu.c | 16 +-
arch/riscv/kvm/vm.c | 2 +-
arch/s390/kvm/kvm-s390.c | 4 +-
arch/x86/include/asm/kvm_host.h | 3 +-
arch/x86/include/uapi/asm/kvm.h | 1 +
arch/x86/kvm/cpuid.c | 5 +-
arch/x86/kvm/hyperv.c | 9 +-
arch/x86/kvm/ioapic.c | 3 +-
arch/x86/kvm/svm/avic.c | 9 +-
arch/x86/kvm/svm/nested.c | 12 +-
arch/x86/kvm/svm/svm.c | 17 +-
arch/x86/kvm/svm/svm.h | 1 +
arch/x86/kvm/vmx/nested.c | 61 ++++--
arch/x86/kvm/vmx/nested.h | 1 +
arch/x86/kvm/vmx/vmx.c | 10 +-
arch/x86/kvm/x86.c | 4 +-
include/linux/kvm_host.h | 83 ++++-----
include/uapi/linux/kvm.h | 8 +
tools/testing/selftests/kvm/Makefile.kvm | 1 +
tools/testing/selftests/kvm/guest_memfd_test.c | 2 +-
.../testing/selftests/kvm/include/x86/processor.h | 23 +++
tools/testing/selftests/kvm/include/x86/smm.h | 17 ++
tools/testing/selftests/kvm/lib/x86/processor.c | 26 +++
.../selftests/kvm/x86/evmcs_smm_controls_test.c | 150 +++++++++++++++
tools/testing/selftests/kvm/x86/sev_smoke_test.c | 30 +++
tools/testing/selftests/kvm/x86/smm_test.c | 27 +--
virt/kvm/binary_stats.c | 2 +-
virt/kvm/kvm_main.c | 20 +-
57 files changed, 749 insertions(+), 379 deletions(-)
create mode 100644 tools/testing/selftests/kvm/include/x86/smm.h
create mode 100644 tools/testing/selftests/kvm/x86/evmcs_smm_controls_test.c
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