Hi, This is v3 of adding basic support for running nested guests (L2) in kselftest. This time a framework for enabling stage-2 in the guest is added, including the s2_mmu struct, s2 translation control setup, and a stage-2 page table generator. Similar to L2 vCPU management, all stage-2 work is done in the guest instead of userspace.
An additional shadow_stage2 test is added which leverages the framework to run L2 with stage-2 enabled. * Changes from v2 [1]: - Update vm_paddr_t to gpa_t, vm_vaddr_t to gva_t. - Added framework for enabling stage-2 in the guest. - Added shadow_stage2 test. Thanks! [1]: https://lore.kernel.org/kvmarm/[email protected]/ Wei-Lin Chang (9): KVM: arm64: selftests: Add GPR save/restore functions for NV KVM: arm64: selftests: Add helpers for guest hypervisors KVM: arm64: selftests: Add hello_nested basic NV selftest KVM: arm64: selftests: Enhance hello_nested test KVM: arm64: selftests: Add shadow_stage2 test KVM: arm64: selftests: shadow_stage2: Allocate L2 stack from dedicated pool KVM: arm64: selftests: shadow_stage2: Check supported stage-2 granule size KVM: arm64: selftests: Add infrastructure for using stage-2 in guest KVM: arm64: selftests: shadow_stage2: Turn on stage-2 translation for the nested guest tools/testing/selftests/kvm/Makefile.kvm | 5 + .../selftests/kvm/arm64/hello_nested.c | 134 +++++++++ .../selftests/kvm/arm64/shadow_stage2.c | 165 +++++++++++ .../selftests/kvm/include/arm64/nested.h | 85 ++++++ tools/testing/selftests/kvm/lib/arm64/entry.S | 137 +++++++++ .../selftests/kvm/lib/arm64/hyp-entry.S | 77 +++++ .../testing/selftests/kvm/lib/arm64/nested.c | 264 ++++++++++++++++++ 7 files changed, 867 insertions(+) create mode 100644 tools/testing/selftests/kvm/arm64/hello_nested.c create mode 100644 tools/testing/selftests/kvm/arm64/shadow_stage2.c create mode 100644 tools/testing/selftests/kvm/include/arm64/nested.h create mode 100644 tools/testing/selftests/kvm/lib/arm64/entry.S create mode 100644 tools/testing/selftests/kvm/lib/arm64/hyp-entry.S create mode 100644 tools/testing/selftests/kvm/lib/arm64/nested.c -- 2.43.0
