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authorTejas Upadhyay <[email protected]>2022-03-02 10:02:56 +0530
committerRodrigo Vivi <[email protected]>2022-03-02 17:06:30 -0500
commit0a967f5bfd9134b89681cae58deb222e20840e76 (patch)
tree2913f3b6c07e5d58ec711e8a0dee6f83d483daf3 /tools/perf/scripts/python/netdev-times.py
parentf79a568add12affc44152455fd7f7502aeea8e31 (diff)
iommu/vt-d: Add RPLS to quirk list to skip TE disabling
The VT-d spec requires (10.4.4 Global Command Register, TE field) that: Hardware implementations supporting DMA draining must drain any in-flight DMA read/write requests queued within the Root-Complex before completing the translation enable command and reflecting the status of the command through the TES field in the Global Status register. Unfortunately, some integrated graphic devices fail to do so after some kind of power state transition. As the result, the system might stuck in iommu_disable_translati on(), waiting for the completion of TE transition. This adds RPLS to a quirk list for those devices and skips TE disabling if the qurik hits. Link: https://gitlab.freedesktop.org/drm/intel/-/issues/4898 Tested-by: Raviteja Goud Talla <[email protected]> Cc: Rodrigo Vivi <[email protected]> Acked-by: Lu Baolu <[email protected]> Signed-off-by: Tejas Upadhyay <[email protected]> Reviewed-by: Rodrigo Vivi <[email protected]> Signed-off-by: Rodrigo Vivi <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/20220302043256.191529-1-tejaskumarx.surendrakumar.upadhyay@intel.com
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