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From:   "Hao, Xudong" <xudong.hao@intel.com>
To:     "Sang, Oliver" <oliver.sang@intel.com>,
        Vitaly Kuznetsov <vkuznets@redhat.com>
CC:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "lkp@lists.01.org" <lkp@lists.01.org>, lkp <lkp@intel.com>,
        LKML <linux-kernel@vger.kernel.org>,
        "Yang, Weijiang" <weijiang.yang@intel.com>
Subject: RE: [KVM]  5fc3cfa62b: kernel-selftests.kvm.vmx_pmu_msrs_test.fail
Thread-Topic: [KVM]  5fc3cfa62b: kernel-selftests.kvm.vmx_pmu_msrs_test.fail
Thread-Index: AQHYafBqwzklwF/ZmUyDRfX82lZAwa0j3DZw
Date:   Wed, 18 May 2022 01:41:18 +0000
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References: <20220517131654.GB3820@xsang-OptiPlex-9020>
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+Weijiang who submitted a fix patch.

> -----Original Message-----
> From: Sang, Oliver <oliver.sang@intel.com>
> Sent: Tuesday, May 17, 2022 9:17 PM
> To: Vitaly Kuznetsov <vkuznets@redhat.com>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>; lkp@lists.01.org; lk=
p
> <lkp@intel.com>; Hao, Xudong <xudong.hao@intel.com>; LKML <linux-
> kernel@vger.kernel.org>
> Subject: [KVM] 5fc3cfa62b: kernel-selftests.kvm.vmx_pmu_msrs_test.fail
>=20
>=20
>=20
> Greeting,
>=20
> FYI, we noticed the following commit (built with gcc-11):
>=20
> commit: 5fc3cfa62b85fb60d2383229791f755f333963ed ("KVM: x86: Drop guest
> CPUID check for host initiated writes to MSR_IA32_PERF_CAPABILITIES")
> https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable-rc.git l=
inux-5.15.y
>=20
> in testcase: kernel-selftests
> version: kernel-selftests-x86_64-a6eb654d-1_20220501
> with following parameters:
>=20
> 	group: kvm
> 	ucode: 0xec
>=20
> test-description: The kernel contains a set of "self tests" under the
> tools/testing/selftests/ directory. These are intended to be small unit t=
ests to
> exercise individual code paths in the kernel.
> test-url: https://www.kernel.org/doc/Documentation/kselftest.txt
>=20
>=20
> on test machine: 4 threads Intel(R) Xeon(R) CPU E3-1225 v5 @ 3.30GHz with=
 16G
> memory
>=20
> caused below changes (please refer to attached dmesg/kmsg for entire
> log/backtrace):
>=20
>=20
>=20
>=20
> If you fix the issue, kindly add following tag
> Reported-by: kernel test robot <oliver.sang@intel.com>
>=20
>=20
>=20
> # selftests: kvm: vmx_pmu_msrs_test
> # =3D=3D=3D=3D Test Assertion Failure =3D=3D=3D=3D
> #   x86_64/vmx_pmu_msrs_test.c:117: ret =3D=3D 0
> #   pid=3D10285 tid=3D10285 errno=3D0 - Success
> #      1	0x0000000000402643: main at vmx_pmu_msrs_test.c:117
> #      2	0x00007f8bb619309a: ?? ??:0
> #      3	0x0000000000402759: _start at ??:?
> #   Bad PERF_CAPABILITIES didn't fail.
> not ok 32 selftests: kvm: vmx_pmu_msrs_test # exit=3D254
>=20
>=20
>=20
> To reproduce:
>=20
>         git clone https://github.com/intel/lkp-tests.git
>         cd lkp-tests
>         sudo bin/lkp install job.yaml           # job file is attached in=
 this email
>         bin/lkp split-job --compatible job.yaml # generate the yaml file =
for lkp run
>         sudo bin/lkp run generated-yaml-file
>=20
>         # if come across any failure that blocks the test,
>         # please remove ~/.lkp and /lkp dir to run from a clean state.
>=20
>=20
>=20
> --
> 0-DAY CI Kernel Test Service
> https://01.org/lkp
>=20