Tim Wawrzynczak has uploaded this change for review.
mb/google/brya: Mark the WWAN device as an UntrustedDevice
The ChromiumOS kernel has the ability to restrict devices to their own
IOMMU security domains when ACPI passes this property to a device
downstream of a PCIe RP.
BUG=b:215424986
TEST=verified the property is found and WWAN is restricted to its own
IOMMU domain as expected.
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: I1717c0976d1d961772245fd420368fe5a9c1262e
---
M src/mainboard/google/brya/Kconfig
M src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb
2 files changed, 5 insertions(+), 0 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/28/61628/1
diff --git a/src/mainboard/google/brya/Kconfig b/src/mainboard/google/brya/Kconfig
index c0b8a34..14a34ab 100644
--- a/src/mainboard/google/brya/Kconfig
+++ b/src/mainboard/google/brya/Kconfig
@@ -14,6 +14,7 @@
select DRIVERS_INTEL_PMC
select DRIVERS_INTEL_SOUNDWIRE
select DRIVERS_INTEL_USB4_RETIMER
+ select DRIVERS_PCIE_GENERIC
select DRIVERS_SOUNDWIRE_ALC5682
select DRIVERS_SOUNDWIRE_MAX98373
select DRIVERS_SPI_ACPI
diff --git a/src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb b/src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb
index ee0fbce..060f1fd 100644
--- a/src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb
+++ b/src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb
@@ -161,6 +161,10 @@
.clk_req = 5,
.flags = PCIE_RP_LTR | PCIE_RP_AER,
}"
+ chip drivers/pcie/generic
+ register "is_untrusted" = "1"
+ device pci 0 on end
+ end
end #PCIE6 WWAN
device ref pcie_rp8 on
# Enable SD Card PCIE 8 using clk 3
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