Felix Held has submitted this change. ( https://review.coreboot.org/c/coreboot/+/61628 )
Change subject: mb/google/brya: Mark the WWAN device as an UntrustedDevice ......................................................................
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 Reviewed-on: https://review.coreboot.org/c/coreboot/+/61628 Tested-by: build bot (Jenkins) no-reply@coreboot.org Reviewed-by: Nick Vaccaro nvaccaro@google.com --- M src/mainboard/google/brya/Kconfig M src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb 2 files changed, 5 insertions(+), 0 deletions(-)
Approvals: build bot (Jenkins): Verified Nick Vaccaro: Looks good to me, approved
diff --git a/src/mainboard/google/brya/Kconfig b/src/mainboard/google/brya/Kconfig index 386aa11..b398386 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 a277120..0c0e8c4 100644 --- a/src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb +++ b/src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb @@ -166,6 +166,10 @@ .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