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

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Date:	Sun, 20 Mar 2016 13:34:59 +0800
From:	kbuild test robot <fengguang.wu@...el.com>
To:	Max Filippov <jcmvbkbc@...il.com>
Cc:	kbuild-all@...org, linux-kernel@...r.kernel.org
Subject: arch/xtensa/include/asm/initialize_mmu.h:55: Error: invalid register
 'atomctl' for 'wsr' instruction

Hi Max,

FYI, the error/warning still remains.

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>

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