[PATCH v2 0/7] Use TAP in some more x86 KVM selftests

[Thomas Huth <thuth@redhat.com>]

Here's a follow-up from my RFC series last year:

 https://lore.kernel.org/lkml/20221004093131.40392-1-thuth@redhat.com/T/

and from v1 earlier this year:

 https://lore.kernel.org/kvm/20230712075910.22480-1-thuth@redhat.com/

Basic idea of this series is now to use the kselftest_harness.h
framework to get TAP output in the tests, so that it is easier
for the user to see what is going on, and e.g. to be able to
detect whether a certain test is part of the test binary or not
(which is useful when tests get extended in the course of time).

v2:
- Dropped the "Rename the ASSERT_EQ macro" patch (already merged)
- Split the fixes in the sync_regs_test into separate patches
  (see the first two patches)
- Introduce the KVM_ONE_VCPU_TEST_SUITE() macro as suggested
  by Sean (see third patch) and use it in the following patches
- Add a new patch to convert vmx_pmu_caps_test.c, too

Thomas Huth (7):
  KVM: selftests: x86: sync_regs_test: Use vcpu_run() where appropriate
  KVM: selftests: x86: sync_regs_test: Get regs structure before
    modifying it
  KVM: selftests: Add a macro to define a test with one vcpu
  KVM: selftests: x86: Use TAP interface in the sync_regs test
  KVM: selftests: x86: Use TAP interface in the fix_hypercall test
  KVM: selftests: x86: Use TAP interface in the vmx_pmu_caps test
  KVM: selftests: x86: Use TAP interface in the userspace_msr_exit test

 .../selftests/kvm/include/kvm_test_harness.h  |  35 +++++
 .../selftests/kvm/x86_64/fix_hypercall_test.c |  27 ++--
 .../selftests/kvm/x86_64/sync_regs_test.c     | 121 +++++++++++++-----
 .../kvm/x86_64/userspace_msr_exit_test.c      |  19 +--
 .../selftests/kvm/x86_64/vmx_pmu_caps_test.c  |  50 ++------
 5 files changed, 160 insertions(+), 92 deletions(-)
 create mode 100644 tools/testing/selftests/kvm/include/kvm_test_harness.h

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2.41.0