linux-kernel - [PATCH v3 0/5] iommu/amd: Use 128-bit cmpxchg operation to update DTE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240906121308.5013-1-suravee.suthikulpanit@amd.com>
Date: Fri, 6 Sep 2024 12:13:03 +0000
From: Suravee Suthikulpanit <suravee.suthikulpanit@....com>
To: <linux-kernel@...r.kernel.org>, <iommu@...ts.linux.dev>
CC: <joro@...tes.org>, <robin.murphy@....com>, <vasant.hegde@....com>,
	<ubizjak@...il.com>, <jgg@...dia.com>, <jon.grimm@....com>,
	<santosh.shukla@....com>, <pandoh@...gle.com>, <kumaranand@...gle.com>,
	Suravee Suthikulpanit <suravee.suthikulpanit@....com>
Subject: [PATCH v3 0/5] iommu/amd: Use 128-bit cmpxchg operation to update DTE

This series modifies current implementation to use 128-bit cmpxchg to update DTE
when needed as specified in the AMD I/O Virtualization Techonology (IOMMU)
Specification.

Changes in V3:
  * Patch 2:
    - Consolidate patch 2 and 3
    - Change rw_semaphore to spin_lock
  * Patch 3: Expand locking across 256-bit DTE read and update
  * Patch 4: Fix clear_dte_entry()
  * Patch 5: Consolidate amd_iommu_set_dirty_tracking() and set_dte_irq_entry() fixes

v2: https://lore.kernel.org/lkml/20240829180726.5022-1-suravee.suthikulpanit@amd.com/
v1 :https://lore.kernel.org/lkml/e937e26f-038a-6d01-76a9-76c86760ca4a@gmail.com/T/

Thanks,
Suravee

Suravee Suthikulpanit (5):
  iommu/amd: Disable AMD IOMMU if CMPXCHG16B feature is not supported
  iommu/amd: Introduce helper functions to access and update 256-bit DTE
  iommu/amd: Modify set_dte_entry() to use 256-bit DTE helpers
  iommu/amd: Modify clear_dte_entry() to avoid in-place update
  iommu/amd: Do not update DTE in-place in amd_iommu_set_dirty_tracking
    and set_dte_irq_entry

 drivers/iommu/amd/amd_iommu_types.h |   8 +-
 drivers/iommu/amd/init.c            |  23 +--
 drivers/iommu/amd/iommu.c           | 272 +++++++++++++++++++---------
 3 files changed, 201 insertions(+), 102 deletions(-)

-- 
2.34.1