On Tue, 09 Jan 2024 15:11:16 +0100, Vitaly Kuznetsov wrote: > It was discovered that 'hyperv_clock' fails miserably when the system is > using an unsupported (by KVM) clocksource, e.g. 'kvm-clock'. The root cause > of the failure is that 'hyperv_clock' doesn't actually check which clocksource > is currently in use. Other tests (kvm_clock_test, vmx_nested_tsc_scaling_test) > have the required check but each test does it on its own. > > Generalize clocksource checking infrastructure, make all three clocksource > dependent tests run with 'tsc' and 'hyperv_clocksource_tsc_page', and skip > gracefully when run in an unsupported configuration. > > [...] Applied to kvm-x86 selftests, thanks! [1/5] KVM: selftests: Generalize check_clocksource() from kvm_clock_test https://github.com/kvm-x86/linux/commit/449d0d6ccf55 [2/5] KVM: selftests: Use generic sys_clocksource_is_tsc() in vmx_nested_tsc_scaling_test https://github.com/kvm-x86/linux/commit/a79036441a68 [3/5] KVM: selftests: Run clocksource dependent tests with hyperv_clocksource_tsc_page too https://github.com/kvm-x86/linux/commit/436e6e541cb2 [4/5] KVM: selftests: Make hyperv_clock require TSC based system clocksource https://github.com/kvm-x86/linux/commit/14fce852a14b [5/5] KVM: x86: Make gtod_is_based_on_tsc() return 'bool' https://github.com/kvm-x86/linux/commit/57cc53712934 -- https://github.com/kvm-x86/linux/tree/next