iommu/io-pgtable-dart: Add DART PTE support for t6000

Browse source

The DARTs present in the M1 Pro/Max/Ultra SoC use a diffent PTE format.
They support a 42bit physical address space by shifting the paddr and
extending its mask inside the PTE.
They also come with mandatory sub-page protection now which we just
configure to always allow access to the entire page. This feature is
already present but optional on the previous DARTs which allows to
unconditionally configure it.

Signed-off-by: Sven Peter <sven@svenpeter.dev>
Co-developed-by: Janne Grunau <j@jannau.net>
Signed-off-by: Janne Grunau <j@jannau.net>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Hector Martin <marcan@marcan.st>
Link: https://lore.kernel.org/r/20220916094152.87137-5-j@jannau.net
Signed-off-by: Joerg Roedel <jroedel@suse.de>

...

This commit is contained in:

Sven Peter 2022-09-16 11:41:51 +02:00 • committed by Joerg Roedel

parent d8fe365a4f

commit dc09fe1c5e

3 changed files with 44 additions and 7 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

49

drivers/iommu/io-pgtable-dart.c

View file

1

drivers/iommu/io-pgtable.c

View file

1

include/linux/io-pgtable.h

View file