From 7d7f3ae69b3b981b632bb8585e5d17497387496a Mon Sep 17 00:00:00 2001 From: Tim Wawrzynczak Date: Fri, 4 Feb 2022 09:35:31 -0700 Subject: [PATCH] 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 Change-Id: I1717c0976d1d961772245fd420368fe5a9c1262e Reviewed-on: https://review.coreboot.org/c/coreboot/+/61628 Tested-by: build bot (Jenkins) Reviewed-by: Nick Vaccaro --- src/mainboard/google/brya/Kconfig | 1 + .../google/brya/variants/baseboard/brya/devicetree.cb | 4 ++++ 2 files changed, 5 insertions(+) diff --git a/src/mainboard/google/brya/Kconfig b/src/mainboard/google/brya/Kconfig index 386aa11624..b398386d6d 100644 --- a/src/mainboard/google/brya/Kconfig +++ b/src/mainboard/google/brya/Kconfig @@ -14,6 +14,7 @@ config BOARD_GOOGLE_BRYA_COMMON 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 a277120074..0c0e8c41d4 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 @@ chip soc/intel/alderlake .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