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Mon, 26 Oct 2020 17:07:27 +0000 (GMT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0F558136055; Mon, 26 Oct 2020 17:07:26 +0000 (GMT) Received: from cpe-66-24-58-13.stny.res.rr.com (unknown [9.85.190.62]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTP; Mon, 26 Oct 2020 17:07:25 +0000 (GMT) Subject: Re: [PATCH v11 12/14] s390/vfio-ap: handle host AP config change notification To: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: kbuild-all@lists.01.org, freude@linux.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.com, mjrosato@linux.ibm.com, pasic@linux.ibm.com, alex.williamson@redhat.com, kwankhede@nvidia.com References: <20201022171209.19494-13-akrowiak@linux.ibm.com> <202010230508.bSSV3BvM-lkp@intel.com> From: Tony Krowiak Message-ID: <7a24ed14-baca-41ea-06ad-681b6da4f405@linux.ibm.com> Date: Mon, 26 Oct 2020 13:07:25 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: <202010230508.bSSV3BvM-lkp@intel.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235,18.0.737 definitions=2020-10-26_08:2020-10-26,2020-10-26 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 adultscore=0 spamscore=0 suspectscore=0 priorityscore=1501 malwarescore=0 impostorscore=0 lowpriorityscore=0 bulkscore=0 mlxlogscore=999 phishscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2010260112 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/22/20 5:17 PM, kernel test robot wrote: > Hi Tony, > > I love your patch! Perhaps something to improve: > > [auto build test WARNING on s390/features] > [also build test WARNING on linus/master next-20201022] > [cannot apply to kvms390/next linux/master v5.9] > [If your patch is applied to the wrong git tree, kindly drop us a note. > And when submitting patch, we suggest to use '--base' as documented in > https://git-scm.com/docs/git-format-patch] > > url: https://github.com/0day-ci/linux/commits/Tony-Krowiak/s390-vfio-ap-dynamic-configuration-support/20201023-011543 > base: https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git features > config: s390-allyesconfig (attached as .config) > compiler: s390-linux-gcc (GCC) 9.3.0 > reproduce (this is a W=1 build): > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross > chmod +x ~/bin/make.cross > # https://github.com/0day-ci/linux/commit/32786ef6d4ba3703d993a8894ea1d763785fd3a4 > git remote add linux-review https://github.com/0day-ci/linux > git fetch --no-tags linux-review Tony-Krowiak/s390-vfio-ap-dynamic-configuration-support/20201023-011543 > git checkout 32786ef6d4ba3703d993a8894ea1d763785fd3a4 > # save the attached .config to linux build tree > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390 > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot > > All warnings (new ones prefixed by >>): > > drivers/s390/crypto/vfio_ap_ops.c:1316:5: warning: no previous prototype for 'vfio_ap_mdev_reset_queue' [-Wmissing-prototypes] > 1316 | int vfio_ap_mdev_reset_queue(unsigned int apid, unsigned int apqi, > | ^~~~~~~~~~~~~~~~~~~~~~~~ This was also reported for patch 01/14 and will be fixed there. > drivers/s390/crypto/vfio_ap_ops.c:1568:6: warning: no previous prototype for 'vfio_ap_mdev_hot_unplug_queue' [-Wmissing-prototypes] > 1568 | void vfio_ap_mdev_hot_unplug_queue(struct vfio_ap_queue *q) > | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ This was also reported for patch 08/14 and will be fixed there. > drivers/s390/crypto/vfio_ap_ops.c: In function 'vfio_ap_mdev_on_cfg_remove': >>> drivers/s390/crypto/vfio_ap_ops.c:1777:7: warning: variable 'unassigned' set but not used [-Wunused-but-set-variable] > 1777 | bool unassigned = false; > | ^~~~~~~~~~ This will be removed. > drivers/s390/crypto/vfio_ap_ops.c: At top level: >>> drivers/s390/crypto/vfio_ap_ops.c:1813:6: warning: no previous prototype for 'vfio_ap_mdev_on_cfg_add' [-Wmissing-prototypes] > 1813 | void vfio_ap_mdev_on_cfg_add(void) > | ^~~~~~~~~~~~~~~~~~~~~~~ > In file included from drivers/s390/crypto/vfio_ap_ops.c:11: > In function 'memcpy', > inlined from 'vfio_ap_mdev_unassign_apids' at drivers/s390/crypto/vfio_ap_ops.c:1655:3, > inlined from 'vfio_ap_mdev_on_cfg_remove' at drivers/s390/crypto/vfio_ap_ops.c:1800:8, > inlined from 'vfio_ap_on_cfg_changed' at drivers/s390/crypto/vfio_ap_ops.c:1836:2: > include/linux/string.h:402:4: error: call to '__read_overflow2' declared with attribute error: detected read beyond size of object passed as 2nd parameter > 402 | __read_overflow2(); > | ^~~~~~~~~~~~~~~~~~ > > vim +/unassigned +1777 drivers/s390/crypto/vfio_ap_ops.c > > 1774 > 1775 static void vfio_ap_mdev_on_cfg_remove(void) > 1776 { >> 1777 bool unassigned = false; > 1778 int ap_remove, aq_remove; > 1779 struct ap_matrix_mdev *matrix_mdev; > 1780 DECLARE_BITMAP(apid_rem, AP_DEVICES); > 1781 DECLARE_BITMAP(apqi_rem, AP_DOMAINS); > 1782 unsigned long *cur_apm, *cur_aqm, *prev_apm, *prev_aqm; > 1783 > 1784 cur_apm = (unsigned long *)matrix_dev->config_info.apm; > 1785 cur_aqm = (unsigned long *)matrix_dev->config_info.aqm; > 1786 prev_apm = (unsigned long *)matrix_dev->config_info_prev.apm; > 1787 prev_aqm = (unsigned long *)matrix_dev->config_info_prev.aqm; > 1788 > 1789 ap_remove = bitmap_andnot(apid_rem, prev_apm, cur_apm, AP_DEVICES); > 1790 aq_remove = bitmap_andnot(apqi_rem, prev_aqm, cur_aqm, AP_DOMAINS); > 1791 > 1792 if (!ap_remove && !aq_remove) > 1793 return; > 1794 > 1795 list_for_each_entry(matrix_mdev, &matrix_dev->mdev_list, node) { > 1796 if (!vfio_ap_mdev_has_crycb(matrix_mdev)) > 1797 continue; > 1798 > 1799 if (ap_remove) { > 1800 if (vfio_ap_mdev_unassign_apids(matrix_mdev, apid_rem)) > 1801 unassigned = true; > 1802 vfio_ap_mdev_unlink_apids(matrix_mdev, apid_rem); > 1803 } > 1804 > 1805 if (aq_remove) { > 1806 if (vfio_ap_mdev_unassign_apqis(matrix_mdev, apqi_rem)) > 1807 unassigned = true; > 1808 vfio_ap_mdev_unlink_apqis(matrix_mdev, apqi_rem); > 1809 } > 1810 } > 1811 } > 1812 >> 1813 void vfio_ap_mdev_on_cfg_add(void) > 1814 { > 1815 unsigned long *cur_apm, *cur_aqm, *prev_apm, *prev_aqm; > 1816 > 1817 cur_apm = (unsigned long *)matrix_dev->config_info.apm; > 1818 cur_aqm = (unsigned long *)matrix_dev->config_info.aqm; > 1819 > 1820 prev_apm = (unsigned long *)matrix_dev->config_info_prev.apm; > 1821 prev_aqm = (unsigned long *)matrix_dev->config_info_prev.aqm; > 1822 > 1823 bitmap_andnot(matrix_dev->ap_add, cur_apm, prev_apm, AP_DEVICES); > 1824 bitmap_andnot(matrix_dev->aq_add, cur_aqm, prev_aqm, AP_DOMAINS); > 1825 } > 1826 > > --- > 0-DAY CI Kernel Test Service, Intel Corporation > https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org