linux-kernel - [PATCH 0/5] iommu/vt-d: Force snooping improvement

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Date:   Sun,  1 May 2022 19:24:29 +0800
From:   Lu Baolu <baolu.lu@...ux.intel.com>
To:     Joerg Roedel <joro@...tes.org>, Jason Gunthorpe <jgg@...dia.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Kevin Tian <kevin.tian@...el.com>
Cc:     Jacob jun Pan <jacob.jun.pan@...el.com>,
        Liu Yi L <yi.l.liu@...el.com>,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        Lu Baolu <baolu.lu@...ux.intel.com>
Subject: [PATCH 0/5] iommu/vt-d: Force snooping improvement

Hi folks,

Previously, the IOMMU capability of enforcing cache coherency is queried
through iommu_capable(IOMMU_CAP_CACHE_COHERENCY). This is a global
capability, hence the IOMMU driver reports support for this capability
only when all IOMMUs in the system has this support.

Commit 6043257b1de06 ("iommu: Introduce the domain op
enforce_cache_coherency()") converts this into a per-domain test-and-set
option, and the previous iommu_capable(IOMMU_CAP_CACHE_COHERENCY) is
deprecated.

This is a follow-up series which improves the Intel IOMMU driver to
support the per-domain scheme better.

Best regards,
baolu 

Lu Baolu (5):
  iommu/vt-d: Block force-snoop domain attaching if no SC support
  iommu/vt-d: Set SNP bit only in second-level page table entries
  iommu/vt-d: Check domain force_snooping against attached devices
  iommu/vt-d: Remove domain_update_iommu_snooping()
  iommu/vt-d: Remove hard coding PGSNP bit in PASID entries

 drivers/iommu/intel/pasid.h |  3 +-
 drivers/iommu/intel/iommu.c | 92 ++++++++++++++++++++++---------------
 drivers/iommu/intel/pasid.c | 24 +++++++---
 3 files changed, 74 insertions(+), 45 deletions(-)

-- 
2.25.1