Re: [PATCH RESEND v12 00/17] KVM: x86/pmu: Add basic support to enable guest PEBS via DS

[Vitaly Kuznetsov]

Like Xu <like.xu.linux@xxxxxxxxx> writes:

...

Hi, the following commit

>   KVM: x86/pmu: Add IA32_PEBS_ENABLE MSR emulation for extended PEBS

(currently in kvm/queue) breaks a number of selftests, e.g.:

# ./tools/testing/selftests/kvm/x86_64/state_test 
==== Test Assertion Failure ====
  lib/x86_64/processor.c:1207: r == nmsrs
  pid=6702 tid=6702 errno=7 - Argument list too long
     1	0x000000000040da11: vcpu_save_state at processor.c:1207 (discriminator 4)
     2	0x00000000004024e5: main at state_test.c:209 (discriminator 6)
     3	0x00007f9f48c2d55f: ?? ??:0
     4	0x00007f9f48c2d60b: ?? ??:0
     5	0x00000000004026d4: _start at ??:?
  Unexpected result from KVM_GET_MSRS, r: 29 (failed MSR was 0x3f1)

I don't think any of these failing tests care about MSR_IA32_PEBS_ENABLE
in particular, they're just trying to do KVM_GET_MSRS/KVM_SET_MSRS.

-- 
Vitaly