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| author | Miles Chen <miles.chen@mediatek.com> | 2020-09-04 13:40:38 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2020-09-04 14:20:36 +0300 |
| commit | c2c59456e1fcad3f464761c5839399176e3a934a (patch) | |
| tree | e5c2e6e114d5b4195f518e9251b7ede6344e8caf /include/dt-bindings/memory | |
| parent | f53dd97874e6d916ce7d3a487a1073ef5c10e153 (diff) | |
| download | linux-c2c59456e1fcad3f464761c5839399176e3a934a.tar.xz | |
iommu/mediatek: Check 4GB mode by reading infracfg
In previous discussion [1] and [2], we found that it is risky to
use max_pfn or totalram_pages to tell if 4GB mode is enabled.
Check 4GB mode by reading infracfg register, remove the usage
of the un-exported symbol max_pfn.
This is a step towards building mtk_iommu as a kernel module.
[1] https://lore.kernel.org/lkml/20200603161132.2441-1-miles.chen@mediatek.com/
[2] https://lore.kernel.org/lkml/20200604080120.2628-1-miles.chen@mediatek.com/
[3] https://lore.kernel.org/lkml/20200715205120.GA778876@bogus/
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Yong Wu <yong.wu@mediatek.com>
Cc: Yingjoe Chen <yingjoe.chen@mediatek.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Rob Herring <robh@kernel.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Joerg Roedel <joro@8bytes.org>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Miles Chen <miles.chen@mediatek.com>
Link: https://lore.kernel.org/r/20200904104038.4979-1-miles.chen@mediatek.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'include/dt-bindings/memory')
0 files changed, 0 insertions, 0 deletions