linux-kernel - [GIT PULL] KVM changes for Linux 6.17-rc7

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Message-ID: <20250918132215.16700-1-pbonzini@redhat.com>
Date: Thu, 18 Sep 2025 15:22:15 +0200
From: Paolo Bonzini <pbonzini@...hat.com>
To: torvalds@...ux-foundation.org
Cc: linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org
Subject: [GIT PULL] KVM changes for Linux 6.17-rc7

Linus,

The following changes since commit f83ec76bf285bea5727f478a68b894f5543ca76e:

  Linux 6.17-rc6 (2025-09-14 14:21:14 -0700)

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 ecd42dd170ea7bacdd9d01d8e74658df8dff621d:

  Merge tag 'kvm-s390-master-6.17-1' of https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD (2025-09-17 19:45:21 +0200)

These are for the most Oliver's Arm changes: lock ordering fixes for the
vGIC, and reverts for a buggy attempt to avoid RCU stalls on large VMs.

----------------------------------------------------------------
Arm:

- Invalidate nested MMUs upon freeing the PGD to avoid WARNs when
  visiting from an MMU notifier

- Fixes to the TLB match process and TLB invalidation range for
  managing the VCNR pseudo-TLB

- Prevent SPE from erroneously profiling guests due to UNKNOWN reset
  values in PMSCR_EL1

- Fix save/restore of host MDCR_EL2 to account for eagerly programming
  at vcpu_load() on VHE systems

- Correct lock ordering when dealing with VGIC LPIs, avoiding scenarios
  where an xarray's spinlock was nested with a *raw* spinlock

- Permit stage-2 read permission aborts which are possible in the case
  of NV depending on the guest hypervisor's stage-2 translation

- Call raw_spin_unlock() instead of the internal spinlock API

- Fix parameter ordering when assigning VBAR_EL1

- Reverted a couple of fixes for RCU stalls when destroying a stage-2
  page table. There appears to be some nasty refcounting / UAF issues
  lurking in those patches and the band-aid we tried to apply didn't
  hold.

s390:

- mm fixes, including userfaultfd bug fix

x86:

- Sync the vTPR from the local APIC to the VMCB even when AVIC is active.
  This fixes a bug where host updates to the vTPR, e.g. via KVM_SET_LAPIC or
  emulation of a guest access, are lost and result in interrupt delivery
  issues in the guest.

----------------------------------------------------------------
Alexandru Elisei (2):
      KVM: arm64: Initialize PMSCR_EL1 when in VHE
      KVM: arm64: VHE: Save and restore host MDCR_EL2 value correctly

Alok Tiwari (1):
      KVM: arm64: vgic: fix incorrect spinlock API usage

Claudio Imbrenda (2):
      KVM: s390: Fix incorrect usage of mmu_notifier_register()
      KVM: s390: Fix FOLL_*/FAULT_FLAG_* confusion

Dongha Lee (1):
      KVM: arm64: nv: Fix incorrect VNCR invalidation range calculation

Fuad Tabba (1):
      KVM: arm64: Fix parameter ordering for VBAR_EL1 assignment

Geonha Lee (1):
      KVM: arm64: nv: fix VNCR TLB ASID match logic for non-Global entries

Maciej S. Szmigiero (1):
      KVM: SVM: Sync TPR from LAPIC into VMCB::V_TPR even if AVIC is active

Marc Zyngier (1):
      KVM: arm64: Mark freed S2 MMUs as invalid

Oliver Upton (8):
      KVM: arm64: vgic: Drop stale comment on IRQ active state
      KVM: arm64: vgic-v3: Use bare refcount for VGIC LPIs
      KVM: arm64: Spin off release helper from vgic_put_irq()
      KVM: arm64: vgic-v3: Erase LPIs from xarray outside of raw spinlocks
      KVM: arm64: vgic-v3: Don't require IRQs be disabled for LPI xarray lock
      KVM: arm64: vgic-v3: Indicate vgic_put_irq() may take LPI xarray lock
      Revert "KVM: arm64: Reschedule as needed when destroying the stage-2 page-tables"
      Revert "KVM: arm64: Split kvm_pgtable_stage2_destroy()"

Paolo Bonzini (3):
      Merge tag 'kvmarm-fixes-6.17-2' of https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
      Merge tag 'kvm-x86-fixes-6.17-rcN' of https://github.com/kvm-x86/linux into HEAD
      Merge tag 'kvm-s390-master-6.17-1' of https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD

Thomas Huth (1):
      KVM: s390: Fix access to unavailable adapter indicator pages during postcopy

Wei-Lin Chang (1):
      KVM: arm64: Remove stage 2 read fault check

 arch/arm64/include/asm/kvm_host.h       |  1 +
 arch/arm64/include/asm/kvm_pgtable.h    | 30 -------------
 arch/arm64/include/asm/kvm_pkvm.h       |  4 +-
 arch/arm64/kvm/arm.c                    |  4 +-
 arch/arm64/kvm/debug.c                  | 13 ++++++
 arch/arm64/kvm/hyp/include/hyp/switch.h |  5 ---
 arch/arm64/kvm/hyp/nvhe/switch.c        |  6 +++
 arch/arm64/kvm/hyp/nvhe/sys_regs.c      |  2 +-
 arch/arm64/kvm/hyp/pgtable.c            | 25 ++---------
 arch/arm64/kvm/mmu.c                    | 45 +++----------------
 arch/arm64/kvm/nested.c                 |  6 +--
 arch/arm64/kvm/pkvm.c                   | 11 +----
 arch/arm64/kvm/vgic/vgic-debug.c        |  2 +-
 arch/arm64/kvm/vgic/vgic-init.c         |  6 +--
 arch/arm64/kvm/vgic/vgic-its.c          | 15 +++----
 arch/arm64/kvm/vgic/vgic-v4.c           |  2 +-
 arch/arm64/kvm/vgic/vgic.c              | 80 ++++++++++++++++++++++++---------
 arch/arm64/kvm/vgic/vgic.h              |  8 ++--
 arch/s390/kvm/interrupt.c               | 15 +++++--
 arch/s390/kvm/kvm-s390.c                | 24 +++++-----
 arch/s390/kvm/pv.c                      | 16 ++++---
 arch/x86/kvm/svm/svm.c                  |  3 +-
 include/kvm/arm_vgic.h                  |  9 ++--
 23 files changed, 155 insertions(+), 177 deletions(-)