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| author |   Shuah Khan <skhan@linuxfoundation.org> | 2020-01-23 15:32:14 -0700 |
|---|---|---|
| committer |   Joerg Roedel <jroedel@suse.de> | 2020-01-24 15:28:40 +0100 |
| commit | 8c17bbf6c8f70058a66305f2e1982552e6ea7f47 (patch) | |
| tree | 8d9f6685bd20bd711f9f61cb6d892cac47bdd38e /Documentation | |
| parent | iommu/vt-d: Call __dmar_remove_one_dev_info with valid pointer (diff) | |
| download | linux-dev-8c17bbf6c8f70058a66305f2e1982552e6ea7f47.tar.xz linux-dev-8c17bbf6c8f70058a66305f2e1982552e6ea7f47.zip | |
iommu/amd: Fix IOMMU perf counter clobbering during init
init_iommu_perf_ctr() clobbers the register when it checks write access
to IOMMU perf counters and fails to restore when they are writable.
Add save and restore to fix it.
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Fixes: 30861ddc9cca4 ("perf/x86/amd: Add IOMMU Performance Counter resource management")
Reviewed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Tested-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions