linux-kernel - Re: [PATCH next] iommu: intel: make DMAR_TABLE select IOMMU

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Date:   Tue, 13 Oct 2020 09:31:38 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Lu Baolu <baolu.lu@...ux.intel.com>
Cc:     David Woodhouse <dwmw2@...radead.org>,
        Joerg Roedel <joro@...tes.org>,
        iommu@...ts.linux-foundation.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: Re: [PATCH next] iommu: intel: make DMAR_TABLE select IOMMU_API

On Tue, Oct 13, 2020 at 3:33 AM Lu Baolu <baolu.lu@...ux.intel.com> wrote:
>
> Hi,
>
> On 10/12/20 8:31 PM, Bartosz Golaszewski wrote:
> > From: Bartosz Golaszewski <bgolaszewski@...libre.com>
> >
> > Since commit c40aaaac1018 ("iommu/vt-d: Gracefully handle DMAR units
> > with no supported address widths") dmar.c needs struct iommu_device to
> > be defined. We need to unconditionally select IOMMU_API when DMAR_TABLE
> > is selected. This fixes the following build error when IOMMU_API is not
> > selected:
> >
> > drivers/iommu/intel/dmar.c: In function ‘free_iommu’:
> > drivers/iommu/intel/dmar.c:1139:41: error: ‘struct iommu_device’ has no member named ‘ops’
> >   1139 |  if (intel_iommu_enabled && iommu->iommu.ops) {
>
> Thanks!
>
> How about making it symmetric with the registration code?
>
>         if (intel_iommu_enabled && !iommu->drhd->ignored)
>
> Best regards,
> baolu
>

Sounds good, just sent out a patch.

Bartosz