linux-kernel - Re: [PATCH] iommu/vt-d: Allocate reserved region for ISA with correct permission

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Date:   Tue, 17 Dec 2019 11:48:38 +0100
From:   Joerg Roedel <jroedel@...e.de>
To:     Lu Baolu <baolu.lu@...ux.intel.com>
Cc:     Jerry Snitselaar <jsnitsel@...hat.com>,
        linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org,
        stable@...r.kernel.org
Subject: Re: [PATCH] iommu/vt-d: Allocate reserved region for ISA with
 correct permission

On Sun, Dec 15, 2019 at 01:39:31PM +0800, Lu Baolu wrote:
> Hi,
> 
> On 12/13/19 1:36 PM, Jerry Snitselaar wrote:
> > Currently the reserved region for ISA is allocated with no
> > permissions. If a dma domain is being used, mapping this region will
> > fail. Set the permissions to DMA_PTE_READ|DMA_PTE_WRITE.
> > 
> > Cc: Joerg Roedel <jroedel@...e.de>
> > Cc: Lu Baolu <baolu.lu@...ux.intel.com>
> > Cc: iommu@...ts.linux-foundation.org
> > Cc: stable@...r.kernel.org # v5.3+
> > Fixes: d850c2ee5fe2 ("iommu/vt-d: Expose ISA direct mapping region via iommu_get_resv_regions")
> > Signed-off-by: Jerry Snitselaar <jsnitsel@...hat.com>
> 
> This fix looks reasonable to me.
> 
> Acked-by: Lu Baolu <baolu.lu@...ux.intel.com>

Applied for v5.5, thanks.