linux-kernel - Re: [PATCH 2/2] iommu/vt-d: fix dev iotlb pfsid use

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Date:   Thu, 7 Jun 2018 16:23:22 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Jacob Pan <jacob.jun.pan@...ux.intel.com>
Cc:     kbuild-all@...org, LKML <linux-kernel@...r.kernel.org>,
        iommu@...ts.linux-foundation.org, Joerg Roedel <joro@...tes.org>,
        David Woodhouse <dwmw2@...radead.org>,
        Raj Ashok <ashok.raj@...el.com>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>
Subject: Re: [PATCH 2/2] iommu/vt-d: fix dev iotlb pfsid use

Hi Jacob,

I love your patch! Yet something to improve:

[auto build test ERROR on iommu/next]
[also build test ERROR on v4.17 next-20180606]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Jacob-Pan/iommu-vt-d-pfsid-fix/20180607-134305
base:   https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next
config: ia64-defconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 8.1.0
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
        make.cross ARCH=ia64 

All errors (new ones prefixed by >>):

   In file included from drivers//iommu/intel-iommu.c:31:
   drivers//iommu/intel-iommu.c: In function 'iommu_enable_dev_iotlb':
>> drivers//iommu/intel-iommu.c:1488:33: error: 'struct pci_dev' has no member named 'physfn'; did you mean 'is_physfn'?
      info->pfsid = PCI_DEVID(pdev->physfn->bus->number, pdev->physfn->devfn);
                                    ^~~~~~
   include/linux/pci.h:51:40: note: in definition of macro 'PCI_DEVID'
    #define PCI_DEVID(bus, devfn) ((((u16)(bus)) << 8) | (devfn))
                                           ^~~
   drivers//iommu/intel-iommu.c:1488:60: error: 'struct pci_dev' has no member named 'physfn'; did you mean 'is_physfn'?
      info->pfsid = PCI_DEVID(pdev->physfn->bus->number, pdev->physfn->devfn);
                                                               ^~~~~~
   include/linux/pci.h:51:55: note: in definition of macro 'PCI_DEVID'
    #define PCI_DEVID(bus, devfn) ((((u16)(bus)) << 8) | (devfn))
                                                          ^~~~~

vim +1488 drivers//iommu/intel-iommu.c

  1467	
  1468	static void iommu_enable_dev_iotlb(struct device_domain_info *info)
  1469	{
  1470		struct pci_dev *pdev;
  1471	
  1472		assert_spin_locked(&device_domain_lock);
  1473	
  1474		if (!info || !dev_is_pci(info->dev))
  1475			return;
  1476	
  1477		pdev = to_pci_dev(info->dev);
  1478		/* For IOMMU that supports device IOTLB throttling (DIT), we assign
  1479		 * PFSID to the invalidation desc of a VF such that IOMMU HW can gauge
  1480		 * queue depth at PF level. If DIT is not set, PFSID will be treated as
  1481		 * reserved, which should be set to 0.
  1482		 */
  1483		if (!ecap_dit(info->iommu->ecap))
  1484			info->pfsid = 0;
  1485		else if (pdev && pdev->is_virtfn) {
  1486			if (ecap_dit(info->iommu->ecap))
  1487				dev_warn(&pdev->dev, "SRIOV VF device IOTLB enabled without flow control\n");
> 1488			info->pfsid = PCI_DEVID(pdev->physfn->bus->number, pdev->physfn->devfn);
  1489		} else
  1490			info->pfsid = PCI_DEVID(info->bus, info->devfn);
  1491	

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