[U-Boot] [PATCH v6 2/8] x86: qemu: add fw_cfg support

[Bin Meng]

On Thu, Jan 7, 2016 at 5:32 PM, Miao Yan <yanmiaobest at gmail.com> wrote:
> The QEMU fw_cfg interface allows the guest to retrieve various data
> information from QEMU. For example, APCI/SMBios tables, number of online
> cpus, kernel data and command line, etc.
>
> This patch adds support for QEMU fw_cfg interface.
>
> Signed-off-by: Miao Yan <yanmiaobest at gmail.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>
> Reviewed-by: Bin Meng <bmeng.cn at gmail.com>
> ---
> Changes in v6:
>   - fix oneline comment
>   - do not update bootargs when kernel cmdline only contains '\0'
>
>  arch/x86/cpu/qemu/Makefile    |   2 +-
>  arch/x86/cpu/qemu/fw_cfg.c    | 283 ++++++++++++++++++++++++++++++++++++++++++
>  arch/x86/cpu/qemu/qemu.c      |   3 +
>  arch/x86/include/asm/fw_cfg.h |  93 ++++++++++++++
>  4 files changed, 380 insertions(+), 1 deletion(-)
>  create mode 100644 arch/x86/cpu/qemu/fw_cfg.c
>  create mode 100644 arch/x86/include/asm/fw_cfg.h
>

Tested-by: Bin Meng <bmeng.cn at gmail.com>