linux-kernel - Re: [PATCH v4 3/3] x86/kvm: Expose AMD Core Perf Extension flag to guests

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 2 Feb 2018 17:26:41 -0600
From:   "Natarajan, Janakarajan" <Janakarajan.Natarajan@....com>
To:     kbuild test robot <lkp@...el.com>
Cc:     kbuild-all@...org, kvm@...r.kernel.org, x86@...nel.org,
        linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H . Peter Anvin" <hpa@...or.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krcmar <rkrcmar@...hat.com>,
        Len Brown <len.brown@...el.com>, Kyle Huey <me@...ehuey.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Borislav Petkov <bp@...e.de>,
        Grzegorz Andrejczuk <grzegorz.andrejczuk@...el.com>,
        Kan Liang <Kan.liang@...el.com>
Subject: Re: [PATCH v4 3/3] x86/kvm: Expose AMD Core Perf Extension flag to
 guests

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