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From: Joerg Roedel <>
To: Joerg Roedel <>
Cc:, Joerg Roedel <>,
Subject: [PATCH 0/2] iommu/amd: Don't use atomic64_t for domain->pt_root
Date: Thu, 25 Jun 2020 16:52:25 +0200	[thread overview]
Message-ID: <> (raw)

From: Joerg Roedel <>


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.



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(-)


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             reply	other threads:[~2020-06-25 14:52 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-25 14:52 Joerg Roedel [this message]
2020-06-25 14:52 ` [PATCH 1/2] iommu/amd: Add helper functions to update domain->pt_root Joerg Roedel
2020-06-25 14:52 ` [PATCH 2/2] iommu/amd: Use 'unsigned long' for domain->pt_root Joerg Roedel
2020-06-25 15:37   ` Qian Cai
2020-06-26  8:05     ` Joerg Roedel

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