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Re: [PATCH 00/10] Add Allwinner H3 SoC and Orange Pi PC Machine

From: Philippe Mathieu-Daudé
Subject: Re: [PATCH 00/10] Add Allwinner H3 SoC and Orange Pi PC Machine
Date: Tue, 10 Dec 2019 09:26:26 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2

On 12/9/19 10:37 PM, Niek Linnenbank wrote:
Hi Philippe,

On Tue, Dec 3, 2019 at 9:47 AM Philippe Mathieu-Daudé <address@hidden <mailto:address@hidden>> wrote:

    On 12/2/19 10:09 PM, Niek Linnenbank wrote:
     > Dear QEMU developers,
     > Hereby I would like to contribute the following set of patches to
     > which add support for the Allwinner H3 System on Chip and the
     > Orange Pi PC machine. The following features and devices are
     >   * SMP (Quad Core Cortex A7)
     >   * Generic Interrupt Controller configuration
     >   * SRAM mappings
     >   * Timer device (re-used from Allwinner A10)
     >   * UART
     >   * SD/MMC storage controller
     >   * EMAC ethernet connectivity
     >   * USB 2.0 interfaces
     >   * Clock Control Unit
     >   * System Control module
     >   * Security Identifier device


     > Functionality related to graphical output such as HDMI, GPU,
     > Display Engine and audio are not included. Recently released
     > mainline Linux kernels (4.19 up to latest master) and mainline U-Boot
     > are known to work. The SD/MMC code is tested using bonnie++ and
     > various tools such as fsck, dd and fdisk. The EMAC is verified
    with iperf3
     > using -netdev socket.
     > To build a Linux mainline kernel that can be booted by the Orange
    Pi PC
     > machine, simply configure the kernel using the sunxi_defconfig
     >   $ ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- make mrproper
     >   $ ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- make sunxi_defconfig
     > To be able to use USB storage, you need to manually enable the
     > configuration item. Start the kconfig configuration tool:
     >   $ ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- make menuconfig
     > Navigate to the following item, enable it and save your
     >   Device Drivers > USB support > USB Mass Storage support
     > Build the Linux kernel with:
     >   $ ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- make -j5
     > To boot the newly build linux kernel in QEMU with the Orange Pi
    PC machine, use:
     >   $ qemu-system-arm -M orangepi -m 512 -nic user -nographic \
     >       -kernel /path/to/linux/arch/arm/boot/zImage \
     >       -append 'console=ttyS0,115200' \
     >       -dtb /path/to/linux/arch/arm/boot/dts/sun8i-h3-orangepi-pc.dtb
     > Note that this kernel does not have a root filesystem. You may
    provide it
     > with an official Orange Pi PC image [1] either as an SD card or as
     > USB mass storage. To boot using the Orange Pi PC Debian image on
    SD card,
     > simply add the -sd argument and provide the proper root= kernel
     >   $ qemu-system-arm -M orangepi -m 512 -nic user -nographic \
     >       -kernel /path/to/linux/arch/arm/boot/zImage \
     >       -append 'console=ttyS0,115200 root=/dev/mmcblk0p2' \
     >       -dtb
    /path/to/linux/arch/arm/boot/dts/sun8i-h3-orangepi-pc.dtb \
     >       -sd OrangePi_pc_debian_stretch_server_linux5.3.5_v1.0.img
     > Alternatively, you can also choose to build and boot a recent
    buildroot [2]
     > using the orangepi_pc_defconfig or Armbian image [3] for Orange
    Pi PC.

    Richard, trying the Armbian image from
    https://apt.armbian.com/pool/main/l/linux-4.20.7-sunxi/ I get:

    $ arm-softmmu/qemu-system-arm -M orangepi -m 512 -nic user \
        -append 'console=ttyS0,115200' \
        -kernel boot/vmlinuz-4.20.7-sunxi \
        -dtb usr/lib/linux-image-dev-sunxi/sun8i-h3-orangepi-pc.dtb \
        -serial stdio -d unimp
    Uncompressing Linux... done, booting the kernel.
    rtc: unimplemented device write (size 4, value 0x16aa0001, offset 0x0)
    rtc: unimplemented device read (size 4, offset 0x0)
    rtc: unimplemented device read (size 4, offset 0x0)
    rtc: unimplemented device read (size 4, offset 0x8)
    qemu-system-arm: target/arm/helper.c:11359: cpu_get_tb_cpu_state:
    Assertion `flags == rebuild_hflags_internal(env)' failed.
    Aborted (core dumped)

I'm trying to reproduce the error you reported here with my patch set on latest master, but so far without any result. The host OS I'm using is Ubuntu 18.04.3 LTS on x86_64. I ran several times using the same 4.20.7-sunxi kernel and same command line.

Some questions that might help:
1) Are there any specific steps you did in order to produce this error?

I build QEMU with:

./configure --enable-trace-backends=log --extra-cflags=-ggdb --enable-debug

2) Could this be a known / existing issue?
3) How many times did you see this error?


4) Are you also using Ubuntu 18.04.3 LTS on x86_64, or a different host OS?

Host is Fedora 30.


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