diff options
| author | Mark Hsieh <mark_hsieh@wistron.corp-partner.google.com> | 2023-06-12 17:47:07 +0800 |
|---|---|---|
| committer | Eric Lai <eric_lai@quanta.corp-partner.google.com> | 2023-06-14 08:25:59 +0000 |
| commit | 7fb661fa8a2d413519823b468e784d0452016019 (patch) | |
| tree | 20ca87929f1547687132e776302cde0ac2ce3183 /Documentation | |
| parent | 2af14fee5278ac27b09b2ff104782ca0a79ee152 (diff) | |
mb/google/nissa/var/joxer: 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 joxer.
BUG=b:285477026
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
Signed-off-by: Mark Hsieh <mark_hsieh@wistron.corp-partner.google.com>
Change-Id: I69b00f0281f4493db157783840d9cdcbb138017f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/75758
Reviewed-by: Derek Huang <derekhuang@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions