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@suse.de Cc: Lu Baolu baolu.lu@linux.intel.com Cc: iommu@lists.linux-foundation.org Cc: stable@vger.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@redhat.com

This fix looks reasonable to me.

Acked-by: Lu Baolu baolu.lu@linux.intel.com

Applied for v5.5, thanks.