Re: [PATCH grub-core/kern/xen/init.c] pvgrub2 xen cmdline xenstore var to grubenv

[Konrad Rzeszutek Wilk]

On Fri, Oct 23, 2015 at 05:11:33PM -0700, Mark Pryor wrote:
> When entering the grub2 shell during a pvgrub2 boot, there is no info about 
> the current
> domU in the grubenv (set). Starting with a patch submitted by Olaf Herring I 
> exported

Which patch? Is there a name for it so it can be part of the
git commit history?

Thanks.
> the xenstore cmdline only.
> 
> The env var, xen_cmdline, can then be used in the top level script used to 
> make
> the pvgrub2 kernel blob.
> 
> Signed-off-by: Mark Pryor <address@hidden>
> ---
>  grub-core/kern/xen/init.c | 25 +++++++++++++++++++++++++
>  1 file changed, 25 insertions(+)
> 
> diff --git a/grub-core/kern/xen/init.c b/grub-core/kern/xen/init.c
> index 0559c03..2a3112d 100644
> --- a/grub-core/kern/xen/init.c
> +++ b/grub-core/kern/xen/init.c
> @@ -524,6 +524,29 @@ map_all_pages (void)
>    grub_mm_init_region ((void *) heap_start, heap_end - heap_start);
>  }
>  
> +/*
> + * Find all name=val pairs in the provided cmd_line and export them
> + * so that scripts can evaluate the variables for their own purpose.
> + */
> +static void
> +export_cmdline (void)
> +{
> +  char *p;
> +  const char *name="xen_cmdline";
> +
> +  p = grub_malloc (MAX_GUEST_CMDLINE + 1);
> +  if (!p)
> +    return;
> +
> +  grub_memcpy (p, grub_xen_start_page_addr->cmd_line, MAX_GUEST_CMDLINE);
> +  p[MAX_GUEST_CMDLINE] = '\0';
> +
> +  grub_env_set (name, p);
> +  grub_env_export (name);
> +
> +   grub_free (p);
> +}
> +
>  extern char _end[];
>  
>  void
> @@ -539,6 +562,8 @@ grub_machine_init (void)
>  
>    map_all_pages ();
>  
> +  export_cmdline ();
> +
>    grub_console_init ();
>  
>    grub_tsc_init ();
> -- 
> 2.1.4
> 
> 
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