linux-kernel - Re: [PATCH v1 5/8] vfio/type1: Report 1st-level/stage-1 format to userspace

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Date:   Mon, 23 Mar 2020 00:44:38 +0800
From:   kbuild test robot <lkp@...el.com>
To:     "Liu, Yi L" <yi.l.liu@...el.com>
Cc:     kbuild-all@...ts.01.org, alex.williamson@...hat.com,
        eric.auger@...hat.com, kevin.tian@...el.com,
        jacob.jun.pan@...ux.intel.com, joro@...tes.org,
        ashok.raj@...el.com, yi.l.liu@...el.com, jun.j.tian@...el.com,
        yi.y.sun@...el.com, jean-philippe@...aro.org, peterx@...hat.com,
        iommu@...ts.linux-foundation.org, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, hao.wu@...el.com
Subject: Re: [PATCH v1 5/8] vfio/type1: Report 1st-level/stage-1 format to
 userspace

Hi Yi,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on vfio/next]
[also build test ERROR on v5.6-rc6 next-20200320]
[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/Liu-Yi-L/vfio-expose-virtual-Shared-Virtual-Addressing-to-VMs/20200322-213259
base:   https://github.com/awilliam/linux-vfio.git next
config: arm64-defconfig (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.2.0
reproduce:
        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
        GCC_VERSION=9.2.0 make.cross ARCH=arm64 

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

All errors (new ones prefixed by >>):

   drivers/vfio/vfio_iommu_type1.c: In function 'vfio_iommu_get_stage1_format':
>> drivers/vfio/vfio_iommu_type1.c:2273:4: error: 'DOMAIN_ATTR_PASID_FORMAT' undeclared (first use in this function)
    2273 |    DOMAIN_ATTR_PASID_FORMAT, &format)) {
         |    ^~~~~~~~~~~~~~~~~~~~~~~~
   drivers/vfio/vfio_iommu_type1.c:2273:4: note: each undeclared identifier is reported only once for each function it appears in
   drivers/vfio/vfio_iommu_type1.c: In function 'vfio_iommu_type1_ioctl':
   drivers/vfio/vfio_iommu_type1.c:2355:11: error: implicit declaration of function 'iommu_get_uapi_version' [-Werror=implicit-function-declaration]
    2355 |    return iommu_get_uapi_version();
         |           ^~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/DOMAIN_ATTR_PASID_FORMAT +2273 drivers/vfio/vfio_iommu_type1.c

  2257	
  2258	static int vfio_iommu_get_stage1_format(struct vfio_iommu *iommu,
  2259						 u32 *stage1_format)
  2260	{
  2261		struct vfio_domain *domain;
  2262		u32 format = 0, tmp_format = 0;
  2263		int ret;
  2264	
  2265		mutex_lock(&iommu->lock);
  2266		if (list_empty(&iommu->domain_list)) {
  2267			mutex_unlock(&iommu->lock);
  2268			return -EINVAL;
  2269		}
  2270	
  2271		list_for_each_entry(domain, &iommu->domain_list, next) {
  2272			if (iommu_domain_get_attr(domain->domain,
> 2273				DOMAIN_ATTR_PASID_FORMAT, &format)) {
  2274				ret = -EINVAL;
  2275				format = 0;
  2276				goto out_unlock;
  2277			}
  2278			/*
  2279			 * format is always non-zero (the first format is
  2280			 * IOMMU_PASID_FORMAT_INTEL_VTD which is 1). For
  2281			 * the reason of potential different backed IOMMU
  2282			 * formats, here we expect to have identical formats
  2283			 * in the domain list, no mixed formats support.
  2284			 * return -EINVAL to fail the attempt of setup
  2285			 * VFIO_TYPE1_NESTING_IOMMU if non-identical formats
  2286			 * are detected.
  2287			 */
  2288			if (tmp_format && tmp_format != format) {
  2289				ret = -EINVAL;
  2290				format = 0;
  2291				goto out_unlock;
  2292			}
  2293	
  2294			tmp_format = format;
  2295		}
  2296		ret = 0;
  2297	
  2298	out_unlock:
  2299		if (format)
  2300			*stage1_format = format;
  2301		mutex_unlock(&iommu->lock);
  2302		return ret;
  2303	}
  2304	

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

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