iommu/s390: allow larger region tables

Browse source

Extend the aperture calculation to consider sizes beyond the maximum
size of a region third table.  Attempt to always use the smallest
table size possible to avoid unnecessary extra steps during translation.
Update reserved region calculations to use the appropriate table size.

Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Link: https://lore.kernel.org/r/20250411202433.181683-6-mjrosato@linux.ibm.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

...

This commit is contained in:

Matthew Rosato 2025-04-11 16:24:33 -04:00 • committed by Joerg Roedel

parent d5fbc5efbd

commit 81244074b5

2 changed files with 53 additions and 18 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

1

arch/s390/include/asm/pci_dma.h

View file

70

drivers/iommu/s390-iommu.c

View file