On 10/8/19 4:02 PM, Nadav Amit wrote:
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
Interesting. I just ran the latest on bare-metal and it did pass.
enabling apic
enabling apic
paging enabled
cr0 = 80010011
cr3 = 62a000
cr4 = 20
NPT detected - running all tests with NPT enabled
PASS: null
PASS: vmrun
PASS: ioio
PASS: vmrun intercept check
PASS: cr3 read intercept
PASS: cr3 read nointercept
PASS: cr3 read intercept emulate
PASS: dr intercept check
PASS: next_rip
PASS: msr intercept check
PASS: mode_switch
PASS: asid_zero
PASS: sel_cr0_bug
PASS: npt_nx
PASS: npt_us
PASS: npt_rsvd
PASS: npt_rw
PASS: npt_rsvd_pfwalk
PASS: npt_rw_pfwalk
PASS: npt_l1mmio
PASS: npt_rw_l1mmio
PASS: tsc_adjust
Latency VMRUN : max: 49300 min: 3160 avg: 3228
Latency VMEXIT: max: 607780 min: 2940 avg: 2999
PASS: latency_run_exit
Latency VMLOAD: max: 29720 min: 300 avg: 306
Latency VMSAVE: max: 31660 min: 280 avg: 282
Latency STGI: max: 18860 min: 40 avg: 54
Latency CLGI: max: 16060 min: 40 avg: 53
PASS: latency_svm_insn
SUMMARY: 24 tests
