linux-hardening - Re: [PATCH 7/7] arm64: dts: qcom: Add SM8550 Xperia 1 V

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Date: Mon, 12 Feb 2024 18:26:24 +0100
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Konrad Dybcio <konrad.dybcio@...aro.org>,
 James Schulman <james.schulman@...rus.com>,
 David Rhodes <david.rhodes@...rus.com>,
 Richard Fitzgerald <rf@...nsource.cirrus.com>,
 Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
 Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Ricardo Rivera-Matos <rriveram@...nsource.cirrus.com>,
 Bjorn Andersson <andersson@...nel.org>, Abel Vesa <abel.vesa@...aro.org>,
 Sai Prakash Ranjan <quic_saipraka@...cinc.com>,
 Kees Cook <keescook@...omium.org>, Tony Luck <tony.luck@...el.com>,
 "Guilherme G. Piccoli" <gpiccoli@...lia.com>
Cc: Marijn Suijten <marijn.suijten@...ainline.org>,
 alsa-devel@...a-project.org, patches@...nsource.cirrus.com,
 linux-sound@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
 linux-hardening@...r.kernel.org
Subject: Re: [PATCH 7/7] arm64: dts: qcom: Add SM8550 Xperia 1 V

On 12/02/2024 14:10, Konrad Dybcio wrote:
> Add support for Sony Xperia 1 V, a.k.a PDX234. This device is a part
> of the SoMC SM8550 Yodo platform.
> 
> This commit brings support for:
> * Remoteprocs (sans modem for now)
> * Flash LED (the notification LED is gone :((((()
> * SD Card
> * USB (*including SuperSpeed*) + PMIC_GLINK (it's funky, requires a replug
>    with an cable flip sometimes..)
> * Most regulators
> * Part of I2C-connected peripherals (notably no touch due to a
> driver bug)
> * PCIe0 (PCIe1 is unused)
> 
> Do note display via simplefb is not supported, as the display is blanked
> upon exiting XBL.
> 
> To create a working boot image, you need to run:
> cat arch/arm64/boot/Image.gz arch/arm64/boot/dts/qcom/sm8550-sony-xperia-\
> yodo-pdx234.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 2 \
> -o boot.img-sony-xperia-pdx234
> 
> Then, you need to flash it on the device and get rid of all the
> vendor_boot/dtbo mess:
> 
> // 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 vbmeta.img
> fastboot --disable-verity --disable-verification flash vbmeta_system \
> vbmeta_system.img
> 
> fastboot flash boot boot.img-sony-xperia-pdx234
> fastboot erase vendor_boot
> fastboot erase recovery
> fastboot flash dtbo emptydtbo.img
> fastboot erase init_boot // ? I don't remember if it's necessary, sorry
> fastboot continue
> 
> Where emptydtbo.img is a tiny file that consists of 2 bytes (all zeroes), doing
> a "fastboot erase" won't cut it, the bootloader will go crazy and things will
> fall apart when it tries to overlay random bytes from an empty partition onto a
> perfectly good appended DTB.


DTBc check reports:
arch/arm64/boot/dts/qcom/sm8550-sony-xperia-yodo-pdx234.dtb: pcie-1-phy-aux-clk: 'clock-frequency' is a required property
        from schema $id: http://devicetree.org/schemas/clock/fixed-clock.yaml#

So you'll probably need:
&pcie_1_phy_aux_clk {
	status = "disabled";
};

> 
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> ---
>   arch/arm64/boot/dts/qcom/Makefile                  |   1 +
>   .../dts/qcom/sm8550-sony-xperia-yodo-pdx234.dts    | 779 +++++++++++++++++++++
>   2 files changed, 780 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
> index f7c5662213e4..9bbea531660d 100644
> --- a/arch/arm64/boot/dts/qcom/Makefile
> +++ b/arch/arm64/boot/dts/qcom/Makefile
> @@ -237,6 +237,7 @@ dtb-$(CONFIG_ARCH_QCOM)	+= sm8450-sony-xperia-nagara-pdx224.dtb
>   dtb-$(CONFIG_ARCH_QCOM)	+= sm8550-hdk.dtb
>   dtb-$(CONFIG_ARCH_QCOM)	+= sm8550-mtp.dtb
>   dtb-$(CONFIG_ARCH_QCOM)	+= sm8550-qrd.dtb
> +dtb-$(CONFIG_ARCH_QCOM)	+= sm8550-sony-xperia-yodo-pdx234.dtb
>   dtb-$(CONFIG_ARCH_QCOM)	+= sm8650-mtp.dtb
>   dtb-$(CONFIG_ARCH_QCOM)	+= sm8650-qrd.dtb
>   dtb-$(CONFIG_ARCH_QCOM)	+= x1e80100-crd.dtb
> diff --git a/arch/arm64/boot/dts/qcom/sm8550-sony-xperia-yodo-pdx234.dts b/arch/arm64/boot/dts/qcom/sm8550-sony-xperia-yodo-pdx234.dts
> new file mode 100644
> index 000000000000..85e0d3d66e16
> --- /dev/null
> +++ b/arch/arm64/boot/dts/qcom/sm8550-sony-xperia-yodo-pdx234.dts
> @@ -0,0 +1,779 @@
> +// SPDX-License-Identifier: BSD-3-Clause
> +/*
> + * Copyright (c) 2023, Linaro Limited
> + */
> +
> +/dts-v1/;
> +
> +#include <dt-bindings/firmware/qcom,scm.h>
> +#include <dt-bindings/leds/common.h>
> +#include <dt-bindings/pinctrl/qcom,pmic-gpio.h>
> +#include <dt-bindings/regulator/qcom,rpmh-regulator.h>
> +#include <dt-bindings/sound/cs35l45.h>
> +#include "sm8550.dtsi"
> +#include "pm8010.dtsi"
> +#include "pm8550.dtsi"
> +#include "pm8550b.dtsi"
> +#define PMK8550VE_SID 5
> +#include "pm8550ve.dtsi"
> +#include "pm8550vs.dtsi"
> +#include "pmk8550.dtsi"
> +/* TODO: Only one SID of PMR735D seems accessible? */


What's reported by the cpuinfo pmic array  ?

<snip>

With the pcie thing fixed:
Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>