[U-Boot] [RESEND PATCH v2 14/15] riscv: Add QEMU virt board support

[Auer, Lukas]

Hi Bin,

On Mon, 2018-09-10 at 21:54 -0700, Bin Meng wrote:
> This adds QEMU RISC-V 'virt' board target support, with the hope of
> helping people easily test U-Boot on RISC-V.
> 
> The QEMU virt machine models a generic RISC-V virtual machine with
> support for the VirtIO standard networking and block storage devices.
> It has CLINT, PLIC, 16550A UART devices in addition to VirtIO and
> it also uses device-tree to pass configuration information to guest
> software. It implements RISC-V privileged architecture spec v1.10.
> 
> Both 32-bit and 64-bit builds are supported. Support is pretty much
> preliminary, only booting to U-Boot shell with the UART driver on
> a single core. Booting Linux is not supported yet.
> 
> Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
> 
> ---

Reviewed-by: Lukas Auer <lukas.auer at aisec.fraunhofer.de>

[snip]

> 
> diff --git a/board/emulation/qemu-riscv/Kconfig
> b/board/emulation/qemu-riscv/Kconfig
> new file mode 100644
> index 0000000..029f5efb
> --- /dev/null
> +++ b/board/emulation/qemu-riscv/Kconfig
> @@ -0,0 +1,21 @@
> +if TARGET_QEMU_VIRT
> +
> +config SYS_BOARD
> +	default "qemu-riscv"
> +
> +config SYS_VENDOR
> +	default "emulation"
> +
> +config SYS_CPU
> +	default "qemu"
> +
> +config SYS_CONFIG_NAME
> +	default "qemu-riscv"
> +
> +config SYS_TEXT_BASE
> +	default 0x80000000
> +
> +config BOARD_SPECIFIC_OPTIONS # dummy
> +	def_bool y
> +

Out of curiosity, what is BOARD_SPECIFIC_OPTIONS used for? I see that
other boards have included it as well, but I don't see it actually used
anywhere.

Thanks,
Lukas