tree fbd607977aa377b070384e7d2153393ef3679790
parent 6419fbf1939cecfe547f140841452ff93282e1b9
author Reka Norman <rekanorman@google.com> 1670801779 +1100
committer Felix Held <felix-coreboot@felixheld.de> 1670943177 +0000

mb/google/nissa/var/nivviks,yaviks: Add DmaProperty for ISH

On nissa, the ISH is running closed source firmware, so the ChromeOS
security requirements specify it must be behind an IOMMU. Add
DmaProperty to the ISH _DSD on nivviks and yaviks.

BUG=b:259716145
TEST=Kernel marks ISH (PCI device 12.0) as untrusted, and changes the
IOMMU group type to "DMA". Also, device still goes to S0i3.

Before:
$ cat /sys/devices/pci0000\:00/0000\:00\:12.0/untrusted
0
$ ls /sys/kernel/iommu_groups/5/devices
0000:00:12.0
0000:00:12.7
$ cat /sys/kernel/iommu_groups/5/type
DMA-FQ

After:
$ cat /sys/devices/pci0000\:00/0000\:00\:12.0/untrusted
1
$ ls /sys/kernel/iommu_groups/5/devices
0000:00:12.0
0000:00:12.7
$ cat /sys/kernel/iommu_groups/5/type
DMA

Change-Id: Iaddb24580bda77df0c70ff58eb098213f8b509ad
Signed-off-by: Reka Norman <rekanorman@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/70633
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Kangheui Won <khwon@chromium.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>