Teach selftests' ioctl() macros to detect and report when an ioctl() unexpectedly fails because KVM has killed and/or bugged the VM. Because selftests does the right thing and tries to gracefully clean up VMs, a bugged VM can generate confusing errors, e.g. when deleting memslots. v2: - Drop the ARM patch (not worth the churn). - Drop macros for ioctls() that return file descriptors. Looking at this with fresh eyes, I agree they do more harm than good. [Oliver] v1: https://lore.kernel.org/all/20230804004226.1984505-1-seanjc@xxxxxxxxxx Sean Christopherson (2): KVM: selftests: Drop the single-underscore ioctl() helpers KVM: selftests: Add logic to detect if ioctl() failed because VM was killed .../selftests/kvm/include/kvm_util_base.h | 75 ++++++++++++------- tools/testing/selftests/kvm/lib/kvm_util.c | 2 +- 2 files changed, 51 insertions(+), 26 deletions(-) base-commit: 45b890f7689eb0aba454fc5831d2d79763781677 -- 2.42.0.869.gea05f2083d-goog
