iommu/virtio: Break out bypass identity support into a global static

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To make way for a domain_alloc_paging conversion add the typical global
static IDENTITY domain. This supports VMMs that have a
VIRTIO_IOMMU_F_BYPASS_CONFIG config.

If the VMM does not have support then the domain_alloc path is still used,
which creates an IDENTITY domain out of a paging domain.

Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/1-v4-ff5fb6b03bd1+288-iommu_virtio_domains_jgg@nvidia.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Jason Gunthorpe 2025-04-08 13:35:47 -03:00 • committed by Joerg Roedel

parent f984fb09e6

commit 0d76a6edae

1 changed files with 67 additions and 19 deletions

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drivers/iommu/virtio-iommu.c

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