iommu/vt-d: Add MTL to quirk list to skip TE disabling
authorAbdul Halim, Mohd Syazwan <mohd.syazwan.abdul.halim@intel.com>
Wed, 22 Nov 2023 03:26:06 +0000 (11:26 +0800)
committerJoerg Roedel <jroedel@suse.de>
Mon, 27 Nov 2023 10:07:53 +0000 (11:07 +0100)
commit85b80fdffa867d75dfb9084a839e7949e29064e8
treefc250c79edab607ca9bd291108124a1e91881e3c
parent9a16ab9d640274b20813d2d17475e18d3e99d834
iommu/vt-d: Add MTL 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 switching
address translation on or off 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_translation(), waiting for the completion of TE transition.

Add MTL to the quirk list for those devices and skips TE disabling if the
qurik hits.

Fixes: b1012ca8dc4f ("iommu/vt-d: Skip TE disabling on quirky gfx dedicated iommu")
Cc: stable@vger.kernel.org
Signed-off-by: Abdul Halim, Mohd Syazwan <mohd.syazwan.abdul.halim@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20231116022324.30120-1-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
drivers/iommu/intel/iommu.c