linux-kernel - Re: [PATCH 1/1] iommu/vt-d: Fix dmar pte read access not set error

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Message-ID: <20191217102802.GO8689@8bytes.org>
Date:   Tue, 17 Dec 2019 11:28:02 +0100
From:   Joerg Roedel <joro@...tes.org>
To:     Lu Baolu <baolu.lu@...ux.intel.com>
Cc:     David Woodhouse <dwmw2@...radead.org>, ashok.raj@...el.com,
        jacob.jun.pan@...el.com, kevin.tian@...el.com,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        Jerry Snitselaar <jsnitsel@...hat.com>, stable@...r.kernel.org
Subject: Re: [PATCH 1/1] iommu/vt-d: Fix dmar pte read access not set error

On Wed, Dec 11, 2019 at 09:40:15AM +0800, Lu Baolu wrote:
> If the default DMA domain of a group doesn't fit a device, it
> will still sit in the group but use a private identity domain.
> When map/unmap/iova_to_phys come through iommu API, the driver
> should still serve them, otherwise, other devices in the same
> group will be impacted. Since identity domain has been mapped
> with the whole available memory space and RMRRs, we don't need
> to worry about the impact on it.
> 
> Link: https://www.spinics.net/lists/iommu/msg40416.html
> Cc: Jerry Snitselaar <jsnitsel@...hat.com>
> Reported-by: Jerry Snitselaar <jsnitsel@...hat.com>
> Fixes: 942067f1b6b97 ("iommu/vt-d: Identify default domains replaced with private")
> Cc: stable@...r.kernel.org # v5.3+
> Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>
> ---
>  drivers/iommu/intel-iommu.c | 8 --------
>  1 file changed, 8 deletions(-)

Applied for v5.5, thanks.