linux-kernel - [PATCH v2 0/4] iommu/amd: Enable page-selective flushes

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Date:   Mon, 24 May 2021 15:41:55 -0700
From:   Nadav Amit <nadav.amit@...il.com>
To:     Joerg Roedel <joro@...tes.org>
Cc:     Nadav Amit <namit@...are.com>, Will Deacon <will@...nel.org>,
        Jiajun Cao <caojiajun@...are.com>,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/4] iommu/amd: Enable page-selective flushes

From: Nadav Amit <namit@...are.com>

The previous patch, commit 268aa4548277 ("iommu/amd: Page-specific
invalidations for more than one page") was supposed to enable
page-selective IOTLB flushes on AMD.

The patch had an embaressing bug, and I apologize for it.

Analysis as for why this bug did not result in failures raised
additional issues that caused at least most of the IOTLB flushes not to
be page-selective ones.

The first patch corrects the bug from the previous patch. The next
patches enable page-selective invalidations, which were not enabled
despite the previous patch.

Cc: Joerg Roedel <joro@...tes.org>
Cc: Will Deacon <will@...nel.org>
Cc: Jiajun Cao <caojiajun@...are.com>
Cc: iommu@...ts.linux-foundation.org
Cc: linux-kernel@...r.kernel.org

---

v1->v2:
* Rebase on v5.13-rc3

Nadav Amit (4):
  iommu/amd: Fix wrong parentheses on page-specific invalidations
  iommu/amd: Selective flush on unmap
  iommu/amd: Do not sync on page size changes
  iommu/amd: Do not use flush-queue when NpCache is on

 drivers/iommu/amd/init.c  |  7 ++++++-
 drivers/iommu/amd/iommu.c | 18 +++++++++++++++---
 include/linux/iommu.h     |  3 ++-
 3 files changed, 23 insertions(+), 5 deletions(-)

-- 
2.25.1