linux-kernel - Re: [PATCH] iommu/intel: quirk to disable DMAR for QM57 igfx

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Date:   Tue, 22 Jan 2019 11:39:14 +0100
From:   Joerg Roedel <joro@...tes.org>
To:     Eric Wong <e@...24.org>
Cc:     Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        iommu@...ts.linux-foundation.org, intel-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iommu/intel: quirk to disable DMAR for QM57 igfx

On Fri, Jan 18, 2019 at 12:17:05PM +0000, Eric Wong wrote:
> @@ -5411,6 +5411,7 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e20, quirk_iommu_g4x_gfx);
>  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e30, quirk_iommu_g4x_gfx);
>  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e40, quirk_iommu_g4x_gfx);
>  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e90, quirk_iommu_g4x_gfx);
> +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0044, quirk_iommu_g4x_gfx);
>  
>  static void quirk_iommu_rwbf(struct pci_dev *dev)
>  {
> @@ -5457,7 +5458,6 @@ static void quirk_calpella_no_shadow_gtt(struct pci_dev *dev)
>         }
>  }
>  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0040, quirk_calpella_no_shadow_gtt);
> -DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0044, quirk_calpella_no_shadow_gtt);
>  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x0062, quirk_calpella_no_shadow_gtt);
>  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x006a, quirk_calpella_no_shadow_gtt);

This seems to make sense to me. Joonas, any comments or objections?

Regards,

	Joerg