Re: [PATCH v8 02/16] s390/vfio-ap: use new AP bus interface to search for queue devices

From: kernel test robot
Date: Fri Jun 05 2020 - 20:45:55 EST

Hi Tony,

I love your patch! Perhaps something to improve:

[auto build test WARNING on kvms390/next]
[also build test WARNING on linus/master v5.7]
[cannot apply to s390/features linux/master next-20200605]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url: https://github.com/0day-ci/linux/commits/Tony-Krowiak/s390-vfio-ap-dynamic-configuration-support/20200606-054350
base: https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux.git next
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
# 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 <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>, old ones prefixed by <<):

>> drivers/s390/crypto/vfio_ap_ops.c:130:24: warning: no previous prototype for 'vfio_ap_irq_disable' [-Wmissing-prototypes]
130 | struct ap_queue_status vfio_ap_irq_disable(struct vfio_ap_queue *q)
| ^~~~~~~~~~~~~~~~~~~
>> drivers/s390/crypto/vfio_ap_ops.c:1110:5: warning: no previous prototype for 'vfio_ap_mdev_reset_queue' [-Wmissing-prototypes]
1110 | int vfio_ap_mdev_reset_queue(unsigned int apid, unsigned int apqi,
| ^~~~~~~~~~~~~~~~~~~~~~~~

vim +/vfio_ap_irq_disable +130 drivers/s390/crypto/vfio_ap_ops.c

ec89b55e3bce7c Pierre Morel 2019-05-21 113
ec89b55e3bce7c Pierre Morel 2019-05-21 114 /**
ec89b55e3bce7c Pierre Morel 2019-05-21 115 * vfio_ap_irq_disable
ec89b55e3bce7c Pierre Morel 2019-05-21 116 * @q: The vfio_ap_queue
ec89b55e3bce7c Pierre Morel 2019-05-21 117 *
ec89b55e3bce7c Pierre Morel 2019-05-21 118 * Uses ap_aqic to disable the interruption and in case of success, reset
ec89b55e3bce7c Pierre Morel 2019-05-21 119 * in progress or IRQ disable command already proceeded: calls
ec89b55e3bce7c Pierre Morel 2019-05-21 120 * vfio_ap_wait_for_irqclear() to check for the IRQ bit to be clear
ec89b55e3bce7c Pierre Morel 2019-05-21 121 * and calls vfio_ap_free_aqic_resources() to free the resources associated
ec89b55e3bce7c Pierre Morel 2019-05-21 122 * with the AP interrupt handling.
ec89b55e3bce7c Pierre Morel 2019-05-21 123 *
ec89b55e3bce7c Pierre Morel 2019-05-21 124 * In the case the AP is busy, or a reset is in progress,
ec89b55e3bce7c Pierre Morel 2019-05-21 125 * retries after 20ms, up to 5 times.
ec89b55e3bce7c Pierre Morel 2019-05-21 126 *
ec89b55e3bce7c Pierre Morel 2019-05-21 127 * Returns if ap_aqic function failed with invalid, deconfigured or
ec89b55e3bce7c Pierre Morel 2019-05-21 128 * checkstopped AP.
ec89b55e3bce7c Pierre Morel 2019-05-21 129 */
ec89b55e3bce7c Pierre Morel 2019-05-21 @130 struct ap_queue_status vfio_ap_irq_disable(struct vfio_ap_queue *q)
ec89b55e3bce7c Pierre Morel 2019-05-21 131 {
ec89b55e3bce7c Pierre Morel 2019-05-21 132 struct ap_qirq_ctrl aqic_gisa = {};
ec89b55e3bce7c Pierre Morel 2019-05-21 133 struct ap_queue_status status;
ec89b55e3bce7c Pierre Morel 2019-05-21 134 int retries = 5;
ec89b55e3bce7c Pierre Morel 2019-05-21 135
ec89b55e3bce7c Pierre Morel 2019-05-21 136 do {
ec89b55e3bce7c Pierre Morel 2019-05-21 137 status = ap_aqic(q->apqn, aqic_gisa, NULL);
ec89b55e3bce7c Pierre Morel 2019-05-21 138 switch (status.response_code) {
ec89b55e3bce7c Pierre Morel 2019-05-21 139 case AP_RESPONSE_OTHERWISE_CHANGED:
ec89b55e3bce7c Pierre Morel 2019-05-21 140 case AP_RESPONSE_NORMAL:
ec89b55e3bce7c Pierre Morel 2019-05-21 141 vfio_ap_wait_for_irqclear(q->apqn);
ec89b55e3bce7c Pierre Morel 2019-05-21 142 goto end_free;
ec89b55e3bce7c Pierre Morel 2019-05-21 143 case AP_RESPONSE_RESET_IN_PROGRESS:
ec89b55e3bce7c Pierre Morel 2019-05-21 144 case AP_RESPONSE_BUSY:
ec89b55e3bce7c Pierre Morel 2019-05-21 145 msleep(20);
ec89b55e3bce7c Pierre Morel 2019-05-21 146 break;
ec89b55e3bce7c Pierre Morel 2019-05-21 147 case AP_RESPONSE_Q_NOT_AVAIL:
ec89b55e3bce7c Pierre Morel 2019-05-21 148 case AP_RESPONSE_DECONFIGURED:
ec89b55e3bce7c Pierre Morel 2019-05-21 149 case AP_RESPONSE_CHECKSTOPPED:
ec89b55e3bce7c Pierre Morel 2019-05-21 150 case AP_RESPONSE_INVALID_ADDRESS:
ec89b55e3bce7c Pierre Morel 2019-05-21 151 default:
ec89b55e3bce7c Pierre Morel 2019-05-21 152 /* All cases in default means AP not operational */
ec89b55e3bce7c Pierre Morel 2019-05-21 153 WARN_ONCE(1, "%s: ap_aqic status %d\n", __func__,
ec89b55e3bce7c Pierre Morel 2019-05-21 154 status.response_code);
ec89b55e3bce7c Pierre Morel 2019-05-21 155 goto end_free;
ec89b55e3bce7c Pierre Morel 2019-05-21 156 }
ec89b55e3bce7c Pierre Morel 2019-05-21 157 } while (retries--);
ec89b55e3bce7c Pierre Morel 2019-05-21 158
ec89b55e3bce7c Pierre Morel 2019-05-21 159 WARN_ONCE(1, "%s: ap_aqic status %d\n", __func__,
ec89b55e3bce7c Pierre Morel 2019-05-21 160 status.response_code);
ec89b55e3bce7c Pierre Morel 2019-05-21 161 end_free:
ec89b55e3bce7c Pierre Morel 2019-05-21 162 vfio_ap_free_aqic_resources(q);
5c4c2126fb6981 Christian Borntraeger 2019-07-05 163 q->matrix_mdev = NULL;
ec89b55e3bce7c Pierre Morel 2019-05-21 164 return status;
ec89b55e3bce7c Pierre Morel 2019-05-21 165 }
ec89b55e3bce7c Pierre Morel 2019-05-21 166

:::::: The code at line 130 was first introduced by commit
:::::: ec89b55e3bce7c8a4bc6b1203280e81342d6745c s390: ap: implement PAPQ AQIC interception in kernel

:::::: TO: Pierre Morel <pmorel@xxxxxxxxxxxxx>
:::::: CC: Vasily Gorbik <gor@xxxxxxxxxxxxx>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

Attachment: .config.gz
Description: application/gzip