[SeaBIOS] [Qemu-devel] [PATCH v2] add a boot parameter to set reboot timeout

[Amos Kong]

On 07/09/12 11:11, Amos Kong wrote:
> Added an option to let qemu transfer a configuration file to bios,
> "etc/boot-fail-wait", which could be specified by command
>      -boot reboot-timeout=T
> T have a max value of 0xffff, unit is ms.
>
> With this option, guest will wait for a given time if not find
> bootabled device, then reboot. If reboot-timeout is '-1', guest
> will not reboot, qemu passes '-1' to bios by default.
>
> This feature need the new seabios's support.
>
> Seabios pulls the value from the fwcfg "file" interface, this
> interface is used because SeaBIOS needs a reliable way of
> obtaining a name, value size, and value. It in no way requires
> that there be a real file on the user's host machine.
>
> Signed-off-by: Amos Kong <akong at redhat.com>
> ---
> v2: qemu passes '-1' to bios, guest will not reboot


Gleb, Anthony, any comments?

> ---
>   hw/fw_cfg.c     |   25 +++++++++++++++++++++++++
>   qemu-config.c   |    3 +++
>   qemu-options.hx |   12 +++++++++---
>   vl.c            |    3 ++-
>   4 files changed, 39 insertions(+), 4 deletions(-)
>
> diff --git a/hw/fw_cfg.c b/hw/fw_cfg.c
> index 7b3b576..dcde1a9 100644
> --- a/hw/fw_cfg.c
> +++ b/hw/fw_cfg.c
> @@ -183,6 +183,30 @@ static void fw_cfg_bootsplash(FWCfgState *s)
>       }
>   }
>
> +static void fw_cfg_reboot(FWCfgState *s)
> +{
> +    int reboot_timeout = -1;
> +    char *p;
> +    const char *temp;
> +
> +    /* get user configuration */
> +    QemuOptsList *plist = qemu_find_opts("boot-opts");
> +    QemuOpts *opts = QTAILQ_FIRST(&plist->head);
> +    if (opts != NULL) {
> +        temp = qemu_opt_get(opts, "reboot-timeout");
> +        if (temp != NULL) {
> +            p = (char *)temp;
> +            reboot_timeout = strtol(p, (char **)&p, 10);
> +        }
> +    }
> +    /* validate the input */
> +    if (reboot_timeout > 0xffff) {
> +        error_report("reboot timeout is larger than 65535, force it to 65535.");
> +        reboot_timeout = 0xffff;
> +    }
> +    fw_cfg_add_file(s, "etc/boot-fail-wait", g_memdup(&reboot_timeout, 4), 4);
> +}
> +
>   static void fw_cfg_write(FWCfgState *s, uint8_t value)
>   {
>       int arch = !!(s->cur_entry & FW_CFG_ARCH_LOCAL);
> @@ -497,6 +521,7 @@ FWCfgState *fw_cfg_init(uint32_t ctl_port, uint32_t data_port,
>       fw_cfg_add_i16(s, FW_CFG_MAX_CPUS, (uint16_t)max_cpus);
>       fw_cfg_add_i16(s, FW_CFG_BOOT_MENU, (uint16_t)boot_menu);
>       fw_cfg_bootsplash(s);
> +    fw_cfg_reboot(s);
>
>       s->machine_ready.notify = fw_cfg_machine_ready;
>       qemu_add_machine_init_done_notifier(&s->machine_ready);
> diff --git a/qemu-config.c b/qemu-config.c
> index c05ffbc..b9f9e0f 100644
> --- a/qemu-config.c
> +++ b/qemu-config.c
> @@ -638,6 +638,9 @@ QemuOptsList qemu_boot_opts = {
>           }, {
>               .name = "splash-time",
>               .type = QEMU_OPT_STRING,
> +        }, {
> +            .name = "reboot-timeout",
> +            .type = QEMU_OPT_STRING,
>           },
>           { /*End of list */ }
>       },
> diff --git a/qemu-options.hx b/qemu-options.hx
> index 3c411c4..0249a60 100644
> --- a/qemu-options.hx
> +++ b/qemu-options.hx
> @@ -339,13 +339,14 @@ ETEXI
>
>   DEF("boot", HAS_ARG, QEMU_OPTION_boot,
>       "-boot [order=drives][,once=drives][,menu=on|off]\n"
> -    "      [,splash=sp_name][,splash-time=sp_time]\n"
> +    "      [,splash=sp_name][,splash-time=sp_time][,reboot-timeout=rb_time]\n"
>       "                'drives': floppy (a), hard disk (c), CD-ROM (d), network (n)\n"
>       "                'sp_name': the file's name that would be passed to bios as logo picture, if menu=on\n"
> -    "                'sp_time': the period that splash picture last if menu=on, unit is ms\n",
> +    "                'sp_time': the period that splash picture last if menu=on, unit is ms\n"
> +    "                'rb_timeout': the timeout before guest reboot when boot failed, unit is ms\n",
>       QEMU_ARCH_ALL)
>   STEXI
> - at item -boot [order=@var{drives}][,once=@var{drives}][,menu=on|off][,splash=@var{sp_name}][,splash-time=@var{sp_time}]
> + at item -boot [order=@var{drives}][,once=@var{drives}][,menu=on|off][,splash=@var{sp_name}][,splash-time=@var{sp_time}][,reboot-timeout=@var{rb_timeout}]
>   @findex -boot
>   Specify boot order @var{drives} as a string of drive letters. Valid
>   drive letters depend on the target achitecture. The x86 PC uses: a, b
> @@ -364,6 +365,11 @@ limitation: The splash file could be a jpeg file or a BMP file in 24 BPP
>   format(true color). The resolution should be supported by the SVGA mode, so
>   the recommended is 320x240, 640x480, 800x640.
>
> +A timeout could be passed to bios, guest will pause for @var{rb_timeout} ms
> +when boot failed, then reboot. If @var{rb_timeout} is '-1', guest will not
> +reboot, qemu passes '-1' to bios by default. Currently Seabios for X86
> +system support it.
> +
>   @example
>   # try to boot from network first, then from hard disk
>   qemu-system-i386 -boot order=nc
> diff --git a/vl.c b/vl.c
> index 7c577fa..1bd9931 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -2622,7 +2622,8 @@ int main(int argc, char **argv, char **envp)
>                   {
>                       static const char * const params[] = {
>                           "order", "once", "menu",
> -                        "splash", "splash-time", NULL
> +                        "splash", "splash-time",
> +                        "reboot-timeout", NULL
>                       };
>                       char buf[sizeof(boot_devices)];
>                       char *standard_boot_devices;
>

-- 
			Amos.