linux-kernel - [PATCH 0/2] iommu/amd: Don't use atomic64_t for domain->pt

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Date:   Thu, 25 Jun 2020 16:52:25 +0200
From:   Joerg Roedel <joro@...tes.org>
To:     Joerg Roedel <joro@...tes.org>
Cc:     iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        Suravee Suthikulpanit <suravee.suthikulpanit@....com>,
        Qian Cai <cai@....pw>, Joerg Roedel <jroedel@...e.de>
Subject: [PATCH 0/2] iommu/amd: Don't use atomic64_t for domain->pt_root

From: Joerg Roedel <jroedel@...e.de>

Hi,

a previous discussion pointed out that using atomic64_t for that
purpose is a bit of overkill. This patch-set replaces it with unsigned
long and introduces some helpers first to make the change more easy.

Qian, can you please test these patches in your environment? You can
trigger any race-condition there pretty reliably :)

Other than that, please review and test.

Regards,

	Joerg

Joerg Roedel (2):
  iommu/amd: Add helper functions to update domain->pt_root
  iommu/amd: Use 'unsigned long' for domain->pt_root

 drivers/iommu/amd/amd_iommu_types.h |  2 +-
 drivers/iommu/amd/iommu.c           | 39 ++++++++++++++++++++---------
 2 files changed, 28 insertions(+), 13 deletions(-)

-- 
2.27.0