[v3,00/10] KVM: selftests: Fix and clean up emulator_error_test

Message

David Matlack Oct. 31, 2022, 6 p.m. UTC

Miscellaneous fixes and cleanups to emulator_error_test. The reason I
started looking at this test is because it fails when TDP is disabled,
which pollutes my test results wheneveer I am testing a new series for
upstream.

v3:
 - Collect R-b tags from Sean.
 - Drop ModR/M decoding in favor of hard-coded instruction [Sean]
 - Fix gspurious gcc warning about using uninitialized variable [Sean]
 - Drop assert_ucall_done() helper [Sean]
 - Spelling fixes [Sean]
 - Use kvm_asm_safe*() to check #PF(RSVD) instead of an exception
   handler [Sean]

v2:
 - Split emulator_error_test into 2 separate tests to ensure continued
   test coverage of KVM emulation in response to EPT violations when
   "allow_smaller_maxphyaddr && guest.MAXPHYADDR < host.MAXPHADDR".  [Sean]
 - Test that flds generates #PF(RSVD) when TDP is disabled [Sean]

v1: https://lore.kernel.org/kvm/[e-mail]/

David Matlack (8):
  KVM: selftests: Rename emulator_error_test to
    smaller_maxphyaddr_emulation_test
  KVM: selftests: Explicitly require instructions bytes
  KVM: selftests: Delete dead ucall code
  KVM: selftests: Move flds instruction emulation failure handling to
    header
  KVM: x86/mmu: Use BIT{,_ULL}() for PFERR masks
  KVM: selftests: Copy KVM PFERR masks into selftests
  KVM: selftests: Expect #PF(RSVD) when TDP is disabled
  KVM: selftests: Add a test for KVM_CAP_EXIT_ON_EMULATION_FAILURE

Sean Christopherson (2):
  KVM: selftests: Avoid JMP in non-faulting path of KVM_ASM_SAFE()
  KVM: selftests: Provide error code as a KVM_ASM_SAFE() output

 arch/x86/include/asm/kvm_host.h               |  20 +-
 tools/testing/selftests/kvm/.gitignore        |   3 +-
 tools/testing/selftests/kvm/Makefile          |   3 +-
 .../selftests/kvm/include/x86_64/processor.h  |  66 ++++--
 .../selftests/kvm/lib/x86_64/processor.c      |   1 +
 .../kvm/x86_64/emulator_error_test.c          | 193 ------------------
 .../x86_64/exit_on_emulation_failure_test.c   |  42 ++++
 .../selftests/kvm/x86_64/flds_emulation.h     |  59 ++++++
 .../selftests/kvm/x86_64/hyperv_features.c    |   3 +-
 .../smaller_maxphyaddr_emulation_test.c       | 107 ++++++++++
 10 files changed, 276 insertions(+), 221 deletions(-)
 delete mode 100644 tools/testing/selftests/kvm/x86_64/emulator_error_test.c
 create mode 100644 tools/testing/selftests/kvm/x86_64/exit_on_emulation_failure_test.c
 create mode 100644 tools/testing/selftests/kvm/x86_64/flds_emulation.h
 create mode 100644 tools/testing/selftests/kvm/x86_64/smaller_maxphyaddr_emulation_test.c


base-commit: d5af637323dd156bad071a3f8fc0d7166cca1276