> On Oct 8, 2019, at 9:30 AM, Nadav Amit <nadav.amit@xxxxxxxxx> wrote: > >> On Oct 8, 2019, at 5:19 AM, Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> wrote: >> >> Nadav Amit <nadav.amit@xxxxxxxxx> writes: >> >>> Is kvm-unit-test supposed to pass on AMD machines or AMD VMs?. >> >> It is supposed to but it doesn't :-) Actually, not only kvm-unit-tests >> but the whole SVM would appreciate some love ... >> >>> Clearly, I ask since they do not pass on AMD on bare-metal. >> >> On my AMD EPYC 7401P 24-Core Processor bare metal I get the following >> failures: >> >> FAIL vmware_backdoors (11 tests, 8 unexpected failures) >> >> (Why can't we just check >> /sys/module/kvm/parameters/enable_vmware_backdoor btw???) >> >> FAIL svm (15 tests, 1 unexpected failures) >> >> There is a patch for that: >> >> https://lore.kernel.org/kvm/d3eeb3b5-13d7-34d2-4ce0-fdd534f2bcc3@xxxxxxxxxx/T/#t >> >> Inside a VM on this host I see the following: >> >> FAIL apic-split (timeout; duration=90s) >> FAIL apic (timeout; duration=30) >> >> (I manually inreased the timeout but it didn't help - this is worrisome, >> most likely this is a hang) >> >> FAIL vmware_backdoors (11 tests, 8 unexpected failures) >> >> - same as on bare metal >> >> FAIL port80 (timeout; duration=90s) >> >> - hang again? >> >> FAIL svm (timeout; duration=90s) >> >> - most likely a hang but this is 3-level nesting so oh well.. >> >> FAIL kvmclock_test >> >> - bad but maybe something is wrong with TSC on the host? Need to >> investigate ... >> >> FAIL hyperv_clock >> >> - this is expected as it doesn't work when the clocksource is not TSC >> (e.g. kvm-clock) >> >> Are you seeing different failures? > > Thanks for your quick response. > > I only ran the “apic” tests so far and I got the following failures: > > FAIL: correct xapic id after reset > … > x2apic not detected > FAIL: enable unsupported x2apic > FAIL: apicbase: relocate apic > > The test gets stuck after “apicbase: reserved low bits”. > > Well, I understand it is not a bare-metal thing. I ran the SVM test, and on bare-metal it does not pass. I don’t have the AMD machine for long enough to fix the issues, but for the record, here are test failures and crashes I encountered while running the tests on bare-metal. Failures: - cr3 read intercept emulate - npt_nx - npt_rsvd - npt_rsvd_pfwalk - npt_rw_pfwalk - npt_rw_l1mmio Crashes: - test_dr_intercept - Access to DR4 causes #UD - tsc_adjust_prepare - MSR access causes #GP
