linux-hardening - Re: [PATCH v2 3/3] arm64: dts: qcom: Add device tree for Xiaomi Mi 11 Ultra

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Message-ID: <2085c7a2-046a-4ef0-99b7-1beef0d8d2cb@linaro.org>
Date: Mon, 20 Nov 2023 15:33:00 +0100
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: wuxilin123@...il.com, Andy Gross <agross@...nel.org>,
 Bjorn Andersson <andersson@...nel.org>, Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Kees Cook <keescook@...omium.org>,
 Tony Luck <tony.luck@...el.com>, "Guilherme G. Piccoli" <gpiccoli@...lia.com>
Cc: linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
 devicetree@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH v2 3/3] arm64: dts: qcom: Add device tree for Xiaomi Mi 11
 Ultra

On 21.10.2023 12:20, Xilin Wu via B4 Relay wrote:
> From: Xilin Wu <wuxilin123@...il.com>
> 
> Add support for Xiaomi Mi 11 Ultra. This commit brings support for:
> * Front and rear display panels (initialized by bootloader)
> * USB
> * UFS
> * PCIe0
> * Thermistor sensors
> * ADSP/CDSP/Modem/SLPI
> * IR Transmitter
> * RTC provided by PMK8350
> * Buttons
> 
> To create a working boot image, you need to run:
> cat arch/arm64/boot/Image.gz arch/arm64/boot/dts/qcom/sm8350-xiaomi-\
> star.dtb > .Image.gz-dtb
> 
> mkbootimg \
> --kernel .Image.gz-dtb \
> --ramdisk some_initrd.img \
> --pagesize 4096 \
> --base 0x0 \
> --kernel_offset 0x8000 \
> --ramdisk_offset 0x1000000 \
> --tags_offset 0x100 \
> --cmdline "SOME_CMDLINE" \
> --dtb_offset 0x1f00000 \
> --header_version 1 \
> --os_version 14.0.0 \
> --os_patch_level 2099-12 \
> -o boot.img-xiaomi-star
> 
> Then, you can flash it to slot b on the device:
> 
> // You have to either pull vbmeta{"","_system"} from
> // /dev/block/bootdevice/by-name/ or build one as a part of AOSP build process
> fastboot --disable-verity --disable-verification flash vbmeta_b vbmeta.img
> fastboot --disable-verity --disable-verification flash vbmeta_system_b \
> vbmeta_system.img
> 
> fastboot flash boot_b boot.img-xiaomi-star
> fastboot erase dtbo_b
> fastboot set_active b
> fastboot reboot
> 
> Signed-off-by: Xilin Wu <wuxilin123@...il.com>
> ---
[...]


> +		pmr735a_s1: smps1 {
> +			regulator-name = "pmr735a_s1";
> +			regulator-min-microvolt = <1200000>;
> +			regulator-max-microvolt = <1280000>;
> +		};
You probably want initial mode on this pmic too

[...]

> +
> +&ufs_mem_hc {
> +	reset-gpios = <&tlmm 203 GPIO_ACTIVE_LOW>;
> +	vcc-supply = <&vreg_l7b_2p96>;
> +	vcc-max-microamp = <800000>;
> +	vccq-supply = <&vreg_l9b_1p2>;
> +	vccq-max-microamp = <900000>;
> +	vdd-hba-supply = <&vreg_l9b_1p2>;
These regulators need regulator-allow-set-mode and allowed-modes

Konrad

[...]

> \ No newline at end of file
> 
And this needs to be fixed

looks good otherwise, I think!

Konrad