kernel/tools/testing/selftests/kvm/lib/arm64/processor.c, branch linux-6.19.y

KVM: selftests: Change VM_MODE_PXXV48_4K to VM_MODE_PXXVYY_4K

2025-11-21T00:19:59Z

Use 57-bit addresses with 5-level paging on hardware that supports LA57. Continue to use 48-bit addresses with 4-level paging on hardware that doesn't support LA57. Suggested-by: Sean Christopherson Signed-off-by: Jim Mattson Link: https://patch.msgid.link/20251028225827.2269128-4-jmattson@google.com Signed-off-by: Sean Christopherson

KVM: selftests: Fix irqfd_test for non-x86 architectures

2025-10-13T13:17:03Z

The KVM_IRQFD ioctl fails if no irqchip is present in-kernel, which isn't too surprising as there's not much KVM can do for an IRQ if it cannot resolve a destination. As written the irqfd_test assumes that a 'default' VM created in selftests has an in-kernel irqchip created implicitly. That may be the case on x86 but it isn't necessarily true on other architectures. Add an arch predicate indicating if 'default' VMs get an irqchip and make the irqfd_test depend on it. Work around arm64 VGIC initialization requirements by using vm_create_with_one_vcpu(), ignoring the created vCPU as it isn't used for the test. Reported-by: Sebastian Ott Reported-by: Naresh Kamboju Acked-by: Sean Christopherson Fixes: 7e9b231c402a ("KVM: selftests: Add a KVM_IRQFD test to verify uniqueness requirements") Signed-off-by: Oliver Upton Signed-off-by: Marc Zyngier

Merge branch kvm-arm64/selftests-6.18 into kvmarm-master/next

2025-09-24T18:35:50Z

* kvm-arm64/selftests-6.18: : . : KVM/arm64 selftest updates for 6.18: : : - Large update to run EL1 selftests at EL2 when possible : (20250917212044.294760-1-oliver.upton@linux.dev) : : - Work around lack of ID_AA64MMFR4_EL1 trapping on CPUs : without FEAT_FGT : (20250923173006.467455-1-oliver.upton@linux.dev) : : - Additional fixes and cleanups : (20250920-kvm-arm64-id-aa64isar3-el1-v1-0-1764c1c1c96d@kernel.org) : . KVM: arm64: selftests: Cover ID_AA64ISAR3_EL1 in set_id_regs KVM: arm64: selftests: Remove a duplicate register listing in set_id_regs KVM: arm64: selftests: Cope with arch silliness in EL2 selftest KVM: arm64: selftests: Add basic test for running in VHE EL2 KVM: arm64: selftests: Enable EL2 by default KVM: arm64: selftests: Initialize HCR_EL2 KVM: arm64: selftests: Use the vCPU attr for setting nr of PMU counters KVM: arm64: selftests: Use hyp timer IRQs when test runs at EL2 KVM: arm64: selftests: Select SMCCC conduit based on current EL KVM: arm64: selftests: Provide helper for getting default vCPU target KVM: arm64: selftests: Alias EL1 registers to EL2 counterparts KVM: arm64: selftests: Create a VGICv3 for 'default' VMs KVM: arm64: selftests: Add unsanitised helpers for VGICv3 creation KVM: arm64: selftests: Add helper to check for VGICv3 support KVM: arm64: selftests: Initialize VGICv3 only once KVM: arm64: selftests: Provide kvm_arch_vm_post_create() in library code Signed-off-by: Marc Zyngier

KVM: arm64: selftests: Enable EL2 by default

2025-09-24T18:23:32Z

Take advantage of VHE to implicitly promote KVM selftests to run at EL2 with only slight modification. Update the smccc_filter test to account for this now that the EL2-ness of a VM is visible to tests. Signed-off-by: Oliver Upton Signed-off-by: Marc Zyngier

KVM: arm64: selftests: Initialize HCR_EL2

2025-09-24T18:23:32Z

Initialize HCR_EL2 such that EL2&0 is considered 'InHost', allowing the use of (mostly) unmodified EL1 selftests at EL2. Signed-off-by: Oliver Upton Signed-off-by: Marc Zyngier

KVM: arm64: selftests: Provide helper for getting default vCPU target

2025-09-24T18:23:32Z

The default vCPU target in KVM selftests is pretty boring in that it doesn't enable any vCPU features. Expose a helper for getting the default target to prepare for cramming in more features. Call KVM_ARM_PREFERRED_TARGET directly from get-reg-list as it needs fine-grained control over feature flags. Signed-off-by: Oliver Upton Reviewed-by: Itaru Kitayama Signed-off-by: Marc Zyngier

KVM: arm64: selftests: Alias EL1 registers to EL2 counterparts

2025-09-24T18:23:32Z

FEAT_VHE has the somewhat nice property of implicitly redirecting EL1 register aliases to their corresponding EL2 representations when E2H=1. Unfortunately, there's no such abstraction for userspace and EL2 registers are always accessed by their canonical encoding. Introduce a helper that applies EL2 redirections to sysregs and use aggressive inlining to catch misuse at compile time. Go a little past the architectural definition for ease of use for test authors (e.g. the stack pointer). Signed-off-by: Oliver Upton Signed-off-by: Marc Zyngier

KVM: arm64: selftests: Create a VGICv3 for 'default' VMs

2025-09-24T18:23:32Z

Start creating a VGICv3 by default unless explicitly opted-out by the test. While having an interrupt controller is nice, the real benefit here is clearing a hurdle for EL2 VMs which mandate the presence of a VGIC. Signed-off-by: Oliver Upton Signed-off-by: Marc Zyngier

KVM: arm64: selftests: Provide kvm_arch_vm_post_create() in library code

2025-09-24T18:23:31Z

In order to compel the default usage of EL2 in selftests, move kvm_arch_vm_post_create() to library code and expose an opt-in for using MTE by default. Signed-off-by: Oliver Upton Signed-off-by: Marc Zyngier

KVM: arm64: selftest: Expand external_aborts test to look for TTW levels

2025-09-20T10:05:14Z

Add a basic test corrupting a level-2 table entry to check that the resulting abort is a SEA on a PTW at level-3. Reviewed-by: Oliver Upton Signed-off-by: Marc Zyngier