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| author | Shuah Khan <skhan@linuxfoundation.org> | 2020-01-24 01:32:14 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2020-01-24 17:28:40 +0300 |
| commit | 8c17bbf6c8f70058a66305f2e1982552e6ea7f47 (patch) | |
| tree | 8d9f6685bd20bd711f9f61cb6d892cac47bdd38e /Documentation/devicetree | |
| parent | bf708cfb2f4811d1948a88c41ab96587e84ad344 (diff) | |
| download | linux-8c17bbf6c8f70058a66305f2e1982552e6ea7f47.tar.xz | |
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/devicetree')
0 files changed, 0 insertions, 0 deletions