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Re: [PATCH v5 2/2] xen/arm: allow translated iommu mappings
- To: Julien Grall <julien@xxxxxxx>, Stewart Hildebrand <stewart.hildebrand@xxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Jason Andryuk <jason.andryuk@xxxxxxx>
- Date: Wed, 6 Aug 2025 10:31:20 -0400
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- Cc: Stefano Stabellini <stefano.stabellini@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, "Michal Orzel" <michal.orzel@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
- Delivery-date: Wed, 06 Aug 2025 14:31:28 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 2025-07-26 05:23, Julien Grall wrote:
Hi,
On 25/07/2025 15:01, Stewart Hildebrand wrote:
From: Stefano Stabellini <stefano.stabellini@xxxxxxx>
In preparation of exposing vITS to domUs, generalize arm_iommu_map_page
and arm_iommu_unmap_page to allow ITS doorbell mappings with dfn != mfn.
The mfn does not need to be passed to guest_physmap_remove_page since
there is no mfn checking on the p2m_iommu_map_{rw,ro} p2m types during
unmap. Pass INVALID_MFN to guest_physmap_remove_page.
Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxx>
Signed-off-by: Stewart Hildebrand <stewart.hildebrand@xxxxxxx>
Reviewed-by: Julien Grall <jgrall@xxxxxxxxxx>
Tested-by: Jason Andryuk <jason.andryuk@xxxxxxx>
Thanks,
Jason
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