linux-kernel - Re: [kbuild-all] arch/xtensa/include/asm/initialize_mmu.h:55: Error: invalid register 'atomctl' for 'wsr' instruction

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Date:	Tue, 22 Mar 2016 10:17:31 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Max Filippov <jcmvbkbc@...il.com>
Cc:	kbuild-all@...org, LKML <linux-kernel@...r.kernel.org>,
	Philip Li <philip.li@...el.com>
Subject: Re: [kbuild-all] arch/xtensa/include/asm/initialize_mmu.h:55: Error:
 invalid register 'atomctl' for 'wsr' instruction

Hi Max,

Thank you for the info! CC Philip for following this issue.

Thanks,
Fengguang

On Sun, Mar 20, 2016 at 02:54:54PM +0300, Max Filippov wrote:
> Hi Fengguang,
> 
> On Sun, Mar 20, 2016 at 8:34 AM, kbuild test robot
> <fengguang.wu@...el.com> wrote:
> > Hi Max,
> >
> > FYI, the error/warning still remains.
> 
> Each xtensa core configuration requires corresponding toolchain to be
> built correctly.
> In this case the toolchain needs to be built for de212 core with the
> following overlay:
>   https://github.com/jcmvbkbc/xtensa-toolchain-build/blob/master/overlays/xtensa_de212.tar.gz
> 
> > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> > head:   1e75a9f34a5ed5902707fb74b468356c55142b71
> > commit: ca55b2fef3a9373fcfc30f82fd26bc7fccbda732 xtensa: add de212 core variant
> > date:   5 months ago
> > config: xtensa-nommu_kc705_defconfig (attached as .config)
> > reproduce:
> >         wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
> >         chmod +x ~/bin/make.cross
> >         git checkout ca55b2fef3a9373fcfc30f82fd26bc7fccbda732
> >         # save the attached .config to linux build tree
> >         make.cross ARCH=xtensa
> >
> > All errors (new ones prefixed by >>):
> >
> >    arch/xtensa/include/asm/initialize_mmu.h: Assembler messages:
> >>> arch/xtensa/include/asm/initialize_mmu.h:55: Error: invalid register 'atomctl' for 'wsr' instruction
> >
> > vim +55 arch/xtensa/include/asm/initialize_mmu.h
> >
> > 6cb97111 Baruch Siach 2013-12-29  39
> > c622b29d Max Filippov 2012-11-19  40  #ifdef __ASSEMBLY__
> > c622b29d Max Filippov 2012-11-19  41
> > c622b29d Max Filippov 2012-11-19  42  #define XTENSA_HWVERSION_RC_2009_0 230000
> > c622b29d Max Filippov 2012-11-19  43
> > c622b29d Max Filippov 2012-11-19  44    .macro  initialize_mmu
> > c622b29d Max Filippov 2012-11-19  45
> > c622b29d Max Filippov 2012-11-19  46  #if XCHAL_HAVE_S32C1I && (XCHAL_HW_MIN_VERSION >= XTENSA_HWVERSION_RC_2009_0)
> > c622b29d Max Filippov 2012-11-19  47  /*
> > c622b29d Max Filippov 2012-11-19  48   * We Have Atomic Operation Control (ATOMCTL) Register; Initialize it.
> > c622b29d Max Filippov 2012-11-19  49   * For details see Documentation/xtensa/atomctl.txt
> > c622b29d Max Filippov 2012-11-19  50   */
> > c622b29d Max Filippov 2012-11-19  51  #if XCHAL_DCACHE_IS_COHERENT
> > c622b29d Max Filippov 2012-11-19  52    movi    a3, 0x25        /* For SMP/MX -- internal for writeback,
> > c622b29d Max Filippov 2012-11-19  53                             * RCW otherwise
> > c622b29d Max Filippov 2012-11-19  54                             */
> > c622b29d Max Filippov 2012-11-19 @55  #else
> > c622b29d Max Filippov 2012-11-19  56    movi    a3, 0x29        /* non-MX -- Most cores use Std Memory
> > c622b29d Max Filippov 2012-11-19  57                             * Controlers which usually can't use RCW
> > c622b29d Max Filippov 2012-11-19  58                             */
> > c622b29d Max Filippov 2012-11-19  59  #endif
> > c622b29d Max Filippov 2012-11-19  60    wsr     a3, atomctl
> > c622b29d Max Filippov 2012-11-19  61  #endif  /* XCHAL_HAVE_S32C1I &&
> > c622b29d Max Filippov 2012-11-19  62     * (XCHAL_HW_MIN_VERSION >= XTENSA_HWVERSION_RC_2009_0)
> > c622b29d Max Filippov 2012-11-19  63     */
> >
> > :::::: The code at line 55 was first introduced by commit
> > :::::: c622b29d1f38021411965b7e0170ab055551b257 xtensa: initialize atomctl SR
> >
> > :::::: TO: Max Filippov <jcmvbkbc@...il.com>
> > :::::: CC: Chris Zankel <chris@...kel.net>
> >
> > ---
> > 0-DAY kernel test infrastructure                Open Source Technology Center
> > https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
> 
> 
> 
> -- 
> Thanks.
> -- Max
> _______________________________________________
> kbuild-all mailing list
> kbuild-all@...ts.01.org
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