kernel/linux.git/tools/testing/selftests/kvm/include/arm64, branch v6.18.22

KVM: arm64: selftests: Test effective value of HCR_EL2.AMO

2025-10-13T13:17:03+00:00

A defect against the architecture now allows an implementation to treat AMO as 1 when HCR_EL2.{E2H, TGE} = {1, 0}. KVM now takes advantage of this interpretation to address a quality of emulation issue w.r.t. SError injection. Add a corresponding test case and expect a pending SError to be taken. Signed-off-by: Oliver Upton Signed-off-by: Marc Zyngier

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

2025-09-24T18:35:50+00:00

* 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

2025-09-24T18:23:32+00:00

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: Use hyp timer IRQs when test runs at EL2

2025-09-24T18:23:32+00:00

Arch timer registers are redirected to their hypervisor counterparts when running in VHE EL2. This is great, except for the fact that the hypervisor timers use different PPIs. Use the correct INTIDs when that is the case. Signed-off-by: Oliver Upton Signed-off-by: Marc Zyngier

KVM: arm64: selftests: Select SMCCC conduit based on current EL

2025-09-24T18:23:32+00:00

HVCs are taken within the VM when EL2 is in use. Ensure tests use the SMC instruction when running at EL2 to interact with the host. Signed-off-by: Oliver Upton Signed-off-by: Marc Zyngier

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

2025-09-24T18:23:32+00:00

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

2025-09-24T18:23:32+00:00

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

2025-09-24T18:23:32+00:00

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: Add unsanitised helpers for VGICv3 creation

2025-09-24T18:23:32+00:00

vgic_v3_setup() has a good bit of sanity checking internally to ensure that vCPUs have actually been created and match the dimensioning of the vgic itself. Spin off an unsanitised setup and initialization helper so vgic initialization can be wired in around a 'default' VM's vCPU creation. Signed-off-by: Oliver Upton Signed-off-by: Marc Zyngier

KVM: arm64: selftests: Add helper to check for VGICv3 support

2025-09-24T18:23:32+00:00

Introduce a proper predicate for probing VGICv3 by performing a 'test' creation of the device on a dummy VM. Signed-off-by: Oliver Upton Signed-off-by: Marc Zyngier