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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>
This commit is contained in:
Mark Hsieh 2023-06-12 17:47:07 +08:00 committed by Eric Lai
parent 2af14fee52
commit 7fb661fa8a
1 changed files with 6 additions and 1 deletions
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7
src/mainboard/google/brya/variants/joxer/overridetree.cb
View File

@ -197,7 +197,12 @@ chip soc/intel/alderlake
end
device ref pcie_rp7 off end # PCIE7 no SD card
device ref emmc on end
device ref ish on end
device ref ish on
chip drivers/intel/ish
register "add_acpi_dma_property" = "true"
device generic 0 on end
end
end
device ref ufs on end
device ref pch_espi on
chip ec/google/chromeec