linux-kernel - Re: [PATCH v15 03/15] selftests/powerpc: Add ptrace tests for EBB

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Date:   Wed, 12 Oct 2016 22:06:34 +0800
From:   Simon Guo <wei.guo.simon@...il.com>
To:     Michael Ellerman <mpe@...erman.id.au>
Cc:     linuxppc-dev@...ts.ozlabs.org, Shuah Khan <shuah@...nel.org>,
        Cyril Bur <cyrilbur@...il.com>,
        Chris Smart <chris@...troguy.com>,
        Suraj Jitindar Singh <sjitindarsingh@...il.com>,
        Michael Neuling <mikey@...ling.org>,
        Anshuman Khandual <khandual@...ux.vnet.ibm.com>,
        Jack Miller <jack@...ezen.org>,
        Rashmica Gupta <rashmicy@...il.com>,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH v15 03/15] selftests/powerpc: Add ptrace tests for EBB

On Fri, Oct 07, 2016 at 08:44:48AM +1100, Michael Ellerman wrote:
> wei.guo.simon@...il.com writes:
> 
> > From: Anshuman Khandual <khandual@...ux.vnet.ibm.com>
> >
> > This patch adds ptrace interface test for EBB/PMU specific
> > registers. This also adds some generic ptrace interface
> > based helper functions to be used by other patches later
> > on in the series.
> 
> This is consistently failing for me on a P8 Tuleta (pvr 004b 0201):
> 
> # ./ptrace-ebb 
> test: ptrace_ebb_pmu
> tags: git_version:v4.8-rc5-176-g89cf1de0ae90
> EBBRR: 100059f8
> EBBHR: 100053cc; expected: 100053cc
> BESCR: 8000000100000000
> SIAR:  100012d0
> SDAR:  3fff7e4cc000
> SIER:  3000000; expected: 2000000
> MMCR2: 0; expected: 0
> MMCR0: 180000080; expected: 180000080
> failure: ptrace_ebb_pmu
> 
> cheers
Michael,

Yes.. SIER has different value in baremetal and virtual machine
due to different MSR[HV] value.  I will correct it. Originally I only
tested in virtual BE/LE machines.

Currently all tests cases (with fix) passed on one baremetal P8 machine 
with LE OS installed.  And I will try to find another baremetal with BE 
OS installed to test.

Thanks for indicating it.

BR,
Simon