Hi, These patches add a debug exception test in aarch64 KVM selftests while also adding basic exception handling support. The structure of the exception handling is based on its x86 counterpart. Tests use the same calls to initialize exception handling. And both architectures use vm_handle_exception() to override the handler for a particular vector, or (vector, ec) in the arm64 case. The debug test is similar to x86_64/debug_regs, except that the x86 one controls the debugging from outside the VM. This proposed arm64 test controls and handles debug exceptions from the inside. The final patch adapts the x86 unhandled-vector reporting to use the same mechanism as the one introduced for arm64 (UCALL_UNHANDLED instead of direct x86 port IO). Thanks, Ricardo Ricardo Koller (3): KVM: selftests: Add exception handling support for aarch64 KVM: selftests: Add aarch64/debug-exceptions test KVM: selftests: Use a ucall for x86 unhandled vector reporting tools/testing/selftests/kvm/.gitignore | 1 + tools/testing/selftests/kvm/Makefile | 3 +- .../selftests/kvm/aarch64/debug-exceptions.c | 250 ++++++++++++++++++ .../selftests/kvm/include/aarch64/processor.h | 86 ++++++ .../testing/selftests/kvm/include/kvm_util.h | 1 + .../selftests/kvm/include/x86_64/processor.h | 2 - .../selftests/kvm/lib/aarch64/handlers.S | 104 ++++++++ .../selftests/kvm/lib/aarch64/processor.c | 56 ++++ .../selftests/kvm/lib/x86_64/processor.c | 15 +- 9 files changed, 506 insertions(+), 12 deletions(-) create mode 100644 tools/testing/selftests/kvm/aarch64/debug-exceptions.c create mode 100644 tools/testing/selftests/kvm/lib/aarch64/handlers.S -- 2.31.1.498.g6c1eba8ee3d-goog
