linux-kernel - [PATCH v4 0/5] iommu/s390: support additional table regions

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Message-ID: <20250331202159.85956-1-mjrosato@linux.ibm.com>
Date: Mon, 31 Mar 2025 16:21:54 -0400
From: Matthew Rosato <mjrosato@...ux.ibm.com>
To: joro@...tes.org, will@...nel.org, robin.murphy@....com,
        gerald.schaefer@...ux.ibm.com, schnelle@...ux.ibm.com
Cc: hca@...ux.ibm.com, gor@...ux.ibm.com, agordeev@...ux.ibm.com,
        svens@...ux.ibm.com, borntraeger@...ux.ibm.com, clg@...hat.com,
        iommu@...ts.linux.dev, linux-kernel@...r.kernel.org,
        linux-s390@...r.kernel.org
Subject: [PATCH v4 0/5] iommu/s390: support additional table regions

The series extends the maximum table size allowed by s390-iommu by
increasing the number of table regions supported.  It also adds logic to
construct the table use the minimum number of regions based upon aperture
calculation.

Changes for v4:
- rebase onto master after iommu/next PR merge
- convert patch 3 per Niklas to remove gotos
- convert patch 4 to also remove gotos
- add review tags

Changes for v3:
- rebase onto iommu-next
- move IOTA region type setting into s390-iommu
- remove origin_type and max_table_size from zdev
- adjust reserved region calculation to be dependent on the domain

Changes for v2:
- rebase onto 6.13
- remove 'iommu/s390: add basic routines for region 1st and 2nd tables'
  and put routines in first patch that uses each.  No functional change.

Matthew Rosato (5):
  iommu/s390: set appropriate IOTA region type
  iommu/s390: support cleanup of additional table regions
  iommu/s390: support iova_to_phys for additional table regions
  iommu/s390: support map/unmap for additional table regions
  iommu/s390: allow larger region tables

 arch/s390/include/asm/pci_dma.h |   3 +
 drivers/iommu/s390-iommu.c      | 346 ++++++++++++++++++++++++++++----
 2 files changed, 314 insertions(+), 35 deletions(-)

-- 
2.49.0