[GIT PULL] KVM/arm64 fixes for 6.18, take #1
Marc Zyngier
maz at kernel.org
Tue Oct 14 05:28:57 PDT 2025
Paolo,
As 6.18-rc1 is out, here's a collection of fixes that have accumulated
over the past 3 weeks, addressing a pretty wide ranging set of issues.
Nothing really jumps out, for once, and it's the usual mix of UAPI
tidy-up, architecture fixups, and other random cleanups. Maybe a few
more selftest updates than we usually do, but I'm sure this isn't
going to last!
I'm already looking at some more fixes, so will probably be back next
week with more presents...
You will notice that, just like I did with the main pull request, I'm
adding message-ids to the tag instead of putting them into the
individual patches. It looks rubbish, but I don't have a good
alternative, and I'm not prepared to remove provenance information
from the stuff I ferry upstream.
I'd welcome any guidance that would make things suck less for people
reporting bugs and backporting stuff, despite the "Link: is bad"
nonsense. Preferably something that we can adopt across architectures
supporting KVM.
In the meantime, please pull.
M.
The following changes since commit 3a8660878839faadb4f1a6dd72c3179c1df56787:
Linux 6.18-rc1 (2025-10-12 13:42:36 -0700)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git tags/kvmarm-fixes-6.18-1
for you to fetch changes up to ca88ecdce5f51874a7c151809bd2c936ee0d3805:
arm64: Revamp HCR_EL2.E2H RES1 detection (2025-10-14 08:18:40 +0100)
----------------------------------------------------------------
KVM/arm64 fixes for 6.18, take #1
Improvements and bug fixes:
- Fix the handling of ZCR_EL2 in NV VMs
(20250926194108.84093-1-oliver.upton at linux.dev)
- Pick the correct translation regime when doing a PTW on
the back of a SEA (20250926224246.731748-1-oliver.upton at linux.dev)
- Prevent userspace from injecting an event into a vcpu that isn't
initialised yet (20250930085237.108326-1-oliver.upton at linux.dev)
- Move timer save/restore to the sysreg handling code, fixing EL2 timer
access in the process (20250929160458.3351788-1-maz at kernel.org)
- Add FGT-based trapping of MDSCR_EL1 to reduce the overhead of debug
(20250924235150.617451-1-oliver.upton at linux.dev)
- Fix trapping configuration when the host isn't GICv3
(20251007160704.1673584-1-sascha.bischoff at arm.com)
- Improve the detection of HCR_EL2.E2H being RES1
(20251009121239.29370-1-maz at kernel.org)
- Drop a spurious 'break' statement in the S1 PTW
(20250930135621.162050-1-osama.abdelkader at gmail.com)
- Don't try to access SPE when owned by EL3
(20251010174707.1684200-1-mukesh.ojha at oss.qualcomm.com)
Documentation updates:
- Document the failure modes of event injection
(20250930233620.124607-1-oliver.upton at linux.dev)
- Document that a GICv3 guest can be created on a GICv5 host
with FEAT_GCIE_LEGACY (20251007154848.1640444-1-sascha.bischoff at arm.com)
Selftest improvements:
- Add a sesttest for the effective value of HCR_EL2.AMO
(20250926224454.734066-1-oliver.upton at linux.dev)
- Address build warning in the timer selftest when building
with clang (20250926155838.2612205-1-seanjc at google.com)
- Teach irq_fd selftests about non-x86 architectures
(20250930193301.119859-1-oliver.upton at linux.dev)
- Add missing sysregs to the set_id_regs selftest
(20251012154352.61133-1-zenghui.yu at linux.dev)
- Fix vcpu allocation in the vgic_lpi_stress selftest
(20251008154520.54801-1-zenghui.yu at linux.dev)
- Correctly enable interrupts in the vgic_lpi_stress selftest
(20251007195254.260539-1-oliver.upton at linux.dev)
----------------------------------------------------------------
Marc Zyngier (15):
KVM: arm64: nv: Don't advance PC when pending an SVE exception
KVM: arm64: Hide CNTHV_*_EL2 from userspace for nVHE guests
KVM: arm64: Introduce timer_context_to_vcpu() helper
KVM: arm64: Replace timer context vcpu pointer with timer_id
KVM: arm64: Make timer_set_offset() generally accessible
KVM: arm64: Add timer UAPI workaround to sysreg infrastructure
KVM: arm64: Move CNT*_CTL_EL0 userspace accessors to generic infrastructure
KVM: arm64: Move CNT*_CVAL_EL0 userspace accessors to generic infrastructure
KVM: arm64: Move CNT*CT_EL0 userspace accessors to generic infrastructure
KVM: arm64: Fix WFxT handling of nested virt
KVM: arm64: Kill leftovers of ad-hoc timer userspace access
KVM: arm64: selftests: Make dependencies on VHE-specific registers explicit
KVM: arm64: selftests: Add an E2H=0-specific configuration to get_reg_list
KVM: arm64: selftests: Fix misleading comment about virtual timer encoding
arm64: Revamp HCR_EL2.E2H RES1 detection
Mukesh Ojha (1):
KVM: arm64: Guard PMSCR_EL1 initialization with SPE presence check
Oliver Upton (9):
KVM: arm64: nv: Don't treat ZCR_EL2 as a 'mapped' register
KVM: arm64: Use the in-context stage-1 in __kvm_find_s1_desc_level()
KVM: arm64: selftests: Test effective value of HCR_EL2.AMO
KVM: arm64: Prevent access to vCPU events before init
KVM: arm64: Document vCPU event ioctls as requiring init'ed vCPU
KVM: selftests: Fix irqfd_test for non-x86 architectures
KVM: arm64: selftests: Actually enable IRQs in vgic_lpi_stress
KVM: arm64: Compute per-vCPU FGTs at vcpu_load()
KVM: arm64: nv: Use FGT write trap of MDSCR_EL1 when available
Osama Abdelkader (1):
KVM: arm64: Remove unreachable break after return
Sascha Bischoff (2):
KVM: arm64: gic-v3: Only set ICH_HCR traps for v2-on-v3 or v3 guests
Documentation: KVM: Update GICv3 docs for GICv5 hosts
Sean Christopherson (1):
KVM: arm64: selftests: Track width of timer counter as "int", not "uint64_t"
Zenghui Yu (2):
KVM: arm64: selftests: Sync ID_AA64PFR1, MPIDR, CLIDR in guest
KVM: arm64: selftests: Allocate vcpus with correct size
Documentation/virt/kvm/api.rst | 5 +
Documentation/virt/kvm/devices/arm-vgic-v3.rst | 3 +-
arch/arm64/include/asm/el2_setup.h | 38 +++++-
arch/arm64/include/asm/kvm_host.h | 50 +++++++
arch/arm64/kvm/arch_timer.c | 105 ++-------------
arch/arm64/kvm/arm.c | 7 +
arch/arm64/kvm/at.c | 7 +-
arch/arm64/kvm/config.c | 90 +++++++++++++
arch/arm64/kvm/debug.c | 15 ++-
arch/arm64/kvm/guest.c | 70 ----------
arch/arm64/kvm/handle_exit.c | 7 +-
arch/arm64/kvm/hyp/include/hyp/switch.h | 148 +++------------------
arch/arm64/kvm/hyp/nvhe/pkvm.c | 1 +
arch/arm64/kvm/nested.c | 9 +-
arch/arm64/kvm/sys_regs.c | 131 ++++++++++++++----
arch/arm64/kvm/sys_regs.h | 6 +
arch/arm64/kvm/vgic/vgic-v3.c | 5 +-
include/kvm/arm_arch_timer.h | 24 ++--
.../selftests/kvm/arm64/arch_timer_edge_cases.c | 2 +-
.../testing/selftests/kvm/arm64/external_aborts.c | 43 ++++++
tools/testing/selftests/kvm/arm64/get-reg-list.c | 99 +++++++++++++-
tools/testing/selftests/kvm/arm64/set_id_regs.c | 3 +
.../testing/selftests/kvm/arm64/vgic_lpi_stress.c | 3 +-
.../selftests/kvm/include/arm64/processor.h | 12 +-
tools/testing/selftests/kvm/include/kvm_util.h | 2 +
tools/testing/selftests/kvm/irqfd_test.c | 14 +-
tools/testing/selftests/kvm/lib/arm64/processor.c | 5 +
tools/testing/selftests/kvm/lib/kvm_util.c | 5 +
tools/testing/selftests/kvm/lib/s390/processor.c | 5 +
tools/testing/selftests/kvm/lib/x86/processor.c | 5 +
30 files changed, 565 insertions(+), 354 deletions(-)
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