Date: Wed, 19 Aug 2015 05:55:19 +0200
From: Borislav Petkov <bp@suse.de>
To: Jiri Olsa <jolsa@redhat.com>
Cc: Andy Lutomirski <luto@amacapital.net>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        X86 ML <x86@kernel.org>, Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Ingo Molnar <mingo@redhat.com>, Robert Richter <rric@kernel.org>,
        "H. Peter Anvin" <hpa@zytor.com>, Thomas Gleixner <tglx@linutronix.de>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Namhyung Kim <namhyung@kernel.org>, Jan Stancek <jstancek@redhat.com>,
        Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>,
        Sherry Hurwitz <sherry.hurwitz@amd.com>
Subject: Re: [BUG/RFC] perf test fails on AMD CPUs
Message-ID: <20150819035519.GA31385@nazgul.tnic>
References: <20150816222956.GA14290@krava.brq.redhat.com>
 <20150817043603.GB9387@nazgul.tnic>
 <CALCETrXADuwEi-=kX0GyNt=h2RPCcVRtOtkOao-KBSdy11xr8g@mail.gmail.com>
 <20150818101025.GA15340@krava.brq.redhat.com>
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On Tue, Aug 18, 2015 at 12:10:25PM +0200, Jiri Olsa wrote:
> buuuuuut anyway, it looks like latest AMD firmware issue:
> 
> [root@amd-pike-07 ~]# cat /sys/devices/system/cpu/cpu0/microcode/version
> 0x6000822
> [root@amd-pike-07 perf]# ./perf test 18
> 18: Test breakpoint overflow signal handler                  : Ok
> 
> [root@amd-pike-07 perf]# cat /sys/devices/system/cpu/cpu0/microcode/version
> 0x6000832
> [root@amd-pike-07 perf]# ./perf test 18
> 18: Test breakpoint overflow signal handler                  : FAILED!
> 
> 
> [root@amd-pike-07 ~]# cat /proc/cpuinfo 
> processor       : 7
> vendor_id       : AuthenticAMD
> cpu family      : 21
> model           : 2
> model name      : AMD Opteron(tm) Processor 3380
> stepping        : 0
> microcode       : 0x6000832
> 
> SNIP

Whoops.

Can you please confirm with your debugging code that with version
0x6000822 EFLAGS.RF is set and with 0x6000832 it isn't when running the
aforementioned test?

Thanks.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
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