[cryptodev:master 124/144] drivers/crypto/hisilicon/qm.c:322:2: error: impossible constraint in 'asm'

From: kbuild test robot <lkp@intel.com>
To: Zhou Wang <wangzhou1@hisilicon.com>
Cc: kbuild-all@01.org, linux-crypto@vger.kernel.org,
	Herbert Xu <herbert@gondor.apana.org.au>,
	Shiju Jose <shiju.jose@huawei.com>,
	Kenneth Lee <liguozhu@hisilicon.com>,
	Hao Fang <fanghao11@huawei.com>,
	Jonathan Cameron <Jonathan.Cameron@huawei.com>,
	John Garry <john.garry@huawei.com>
Subject: [cryptodev:master 124/144] drivers/crypto/hisilicon/qm.c:322:2: error: impossible constraint in 'asm'
Date: Fri, 9 Aug 2019 20:20:08 +0800	[thread overview]
Message-ID: <201908092005.GIPAS1Oq%lkp@intel.com> (raw)

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tree:   https://kernel.googlesource.com/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git master
head:   ec9c7d19336ee98ecba8de80128aa405c45feebb
commit: 62c455ca853e3e352e465d66a6cc39f1f88caa60 [124/144] crypto: hisilicon - add HiSilicon ZIP accelerator support
config: sparc64-allmodconfig (attached as .config)
compiler: sparc64-linux-gcc (GCC) 7.4.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 62c455ca853e3e352e465d66a6cc39f1f88caa60
        # save the attached .config to linux build tree
        GCC_VERSION=7.4.0 make.cross ARCH=sparc64 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All error/warnings (new ones prefixed by >>):

   drivers/crypto/hisilicon/qm.c: In function 'qm_mb.constprop':
>> drivers/crypto/hisilicon/qm.c:322:2: warning: asm operand 3 probably doesn't match constraints
     asm volatile("ldp %0, %1, %3\n"
     ^~~
   drivers/crypto/hisilicon/qm.c:322:2: warning: asm operand 4 probably doesn't match constraints
>> drivers/crypto/hisilicon/qm.c:322:2: error: impossible constraint in 'asm'
--
   drivers/crypto/hisilicon/sgl.c: In function 'hisi_acc_sg_buf_map_to_hw_sgl':
>> drivers/crypto/hisilicon/sgl.c:181:14: warning: 'curr_sgl_dma' may be used uninitialized in this function [-Wmaybe-uninitialized]
     *hw_sgl_dma = curr_sgl_dma;
     ~~~~~~~~~~~~^~~~~~~~~~~~~~

vim +/asm +322 drivers/crypto/hisilicon/qm.c

263c9959c9376e Zhou Wang 2019-08-02  315  
263c9959c9376e Zhou Wang 2019-08-02  316  /* 128 bit should be written to hardware at one time to trigger a mailbox */
263c9959c9376e Zhou Wang 2019-08-02  317  static void qm_mb_write(struct hisi_qm *qm, const void *src)
263c9959c9376e Zhou Wang 2019-08-02  318  {
263c9959c9376e Zhou Wang 2019-08-02  319  	void __iomem *fun_base = qm->io_base + QM_MB_CMD_SEND_BASE;
263c9959c9376e Zhou Wang 2019-08-02  320  	unsigned long tmp0 = 0, tmp1 = 0;
263c9959c9376e Zhou Wang 2019-08-02  321  
263c9959c9376e Zhou Wang 2019-08-02 @322  	asm volatile("ldp %0, %1, %3\n"
263c9959c9376e Zhou Wang 2019-08-02  323  		     "stp %0, %1, %2\n"
263c9959c9376e Zhou Wang 2019-08-02  324  		     "dsb sy\n"
263c9959c9376e Zhou Wang 2019-08-02  325  		     : "=&r" (tmp0),
263c9959c9376e Zhou Wang 2019-08-02  326  		       "=&r" (tmp1),
263c9959c9376e Zhou Wang 2019-08-02  327  		       "+Q" (*((char *)fun_base))
263c9959c9376e Zhou Wang 2019-08-02  328  		     : "Q" (*((char *)src))
263c9959c9376e Zhou Wang 2019-08-02  329  		     : "memory");
263c9959c9376e Zhou Wang 2019-08-02  330  }
263c9959c9376e Zhou Wang 2019-08-02  331  

:::::: The code at line 322 was first introduced by commit
:::::: 263c9959c9376ec0217d6adc61222a53469eed3c crypto: hisilicon - add queue management driver for HiSilicon QM module

:::::: TO: Zhou Wang <wangzhou1@hisilicon.com>
:::::: CC: Herbert Xu <herbert@gondor.apana.org.au>

---
0-DAY kernel test infrastructure                Open Source Technology Center
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