Public bug reported:
[Impact]
If a device has an exclusion range specified in the IVRS table, this region
needs to be reserved in the iova-domain of that device. This hasn't happened
until now and can cause data corruption on data transfered with these devices.
Treat exclusion ranges as reserved regions in the iommu-core to fix the problem.
This is a clean cherry pick from mainline of
8aafaaf2212192012f5bae305bb31cdf7681d777
[Test Case]
[Fixes]
Cherry pick the following from Mainline
fd3b3448cf5adc2a2f09b70eaad03c27fe79e7a6 iommu/amd: Reserve exclusion range in
iova-domain
[Regression Risk]
Only affects the amd_iommu driver:
drivers/iommu/amd_iommu*
** Affects: linux (Ubuntu)
Importance: Medium
Assignee: Jeff Lane (bladernr)
Status: In Progress
** Affects: linux (Ubuntu Bionic)
Importance: Undecided
Assignee: Jeff Lane (bladernr)
Status: New
** Affects: linux (Ubuntu Cosmic)
Importance: Undecided
Assignee: Jeff Lane (bladernr)
Status: New
** Affects: linux (Ubuntu Disco)
Importance: Medium
Assignee: Jeff Lane (bladernr)
Status: In Progress
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Cosmic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Xenial)
Importance: Undecided
Status: New
** No longer affects: linux (Ubuntu Xenial)
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https://bugs.launchpad.net/bugs/1823037
Title:
amd_iommu possible data corruption
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