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Subject: Re: [PATCH v4 3/3] x86/kvm: Expose AMD Core Perf Extension flag to
 guests
To:     kbuild test robot <lkp@intel.com>
Cc:     kbuild-all@01.org, kvm@vger.kernel.org, x86@kernel.org,
        linux-kernel@vger.kernel.org, Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>,
        "H . Peter Anvin" <hpa@zytor.com>,
        Paolo Bonzini <pbonzini@redhat.com>,
        Radim Krcmar <rkrcmar@redhat.com>,
        Len Brown <len.brown@intel.com>, Kyle Huey <me@kylehuey.com>,
        Tom Lendacky <thomas.lendacky@amd.com>,
        Borislav Petkov <bp@suse.de>,
        Grzegorz Andrejczuk <grzegorz.andrejczuk@intel.com>,
        Kan Liang <Kan.liang@intel.com>
References: <f481ade083edd15c0f5850babaeef378ab06ffce.1517333237.git.Janakarajan.Natarajan@amd.com>
 <201802030310.MucL4Uiq%fengguang.wu@intel.com>
From:   "Natarajan, Janakarajan" <Janakarajan.Natarajan@amd.com>
Message-ID: <49f7c379-87e9-bf01-1590-63dcd7726d7d@amd.com>
Date:   Fri, 2 Feb 2018 17:26:41 -0600
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On 2/2/2018 2:03 PM, kbuild test robot wrote:
> Hi Janakarajan,
>
> Thank you for the patch! Perhaps something to improve:
>
> [auto build test WARNING on tip/x86/core]
> [also build test WARNING on v4.15]
> [cannot apply to kvm/linux-next next-20180202]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
This patch uses functions defined in commit 
'd6321d493319bfd406c484e8359c6101cbda39d3 KVM: x86: generalize 
guest_cpuid_has_ helpers'.
https://lkml.org/lkml/2017/8/2/811
>
> url:    https://github.com/0day-ci/linux/commits/Janakarajan-Natarajan/Support-Perf-Extensions-on-AMD-KVM-guests/20180202-231344
> reproduce:
>          # apt-get install sparse
>          make ARCH=x86_64 allmodconfig
>          make C=1 CF=-D__CHECK_ENDIAN__
>
>
> sparse warnings: (new ones prefixed by >>)
>
>>> arch/x86/kvm/cpuid.c:58:6: sparse: symbol 'perf_ext_supported' was not declared. Should it be
> Please review and possibly fold the followup patch.
>
> ---
> 0-DAY kernel test infrastructure                Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all                   Intel Corporation