linux-kernel - [PATCH 0/3] iommu/iova: Add CPU hotplug handler to flush rcaches to core code

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Date:   Mon, 1 Mar 2021 20:12:18 +0800
From:   John Garry <john.garry@...wei.com>
To:     <dwmw2@...radead.org>, <baolu.lu@...ux.intel.com>,
        <joro@...tes.org>, <will@...nel.org>
CC:     <iommu@...ts.linux-foundation.org>, <linux-kernel@...r.kernel.org>,
        <linuxarm@...wei.com>, <robin.murphy@....com>,
        John Garry <john.garry@...wei.com>
Subject: [PATCH 0/3] iommu/iova: Add CPU hotplug handler to flush rcaches to core code

The Intel IOMMU driver supports flushing the per-CPU rcaches when a CPU is
offlined.

Let's move it to core code, so everyone can take advantage.

Also correct a code comment.

Based on v5.12-rc1. Tested on arm64 only.

John Garry (3):
  iova: Add CPU hotplug handler to flush rcaches
  iommu/vt-d: Remove IOVA domain rcache flushing for CPU offlining
  iova: Correct comment for free_cpu_cached_iovas()

 drivers/iommu/intel/iommu.c | 31 -------------------------------
 drivers/iommu/iova.c        | 32 ++++++++++++++++++++++++++++++--
 include/linux/cpuhotplug.h  |  2 +-
 include/linux/iova.h        |  1 +
 4 files changed, 32 insertions(+), 34 deletions(-)

-- 
2.26.2