Re: [Xen-devel] [PATCH 4/5] arm: add dom0_mem command line argument

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Thu, 2012-03-22 at 19:17 +0000, David Vrabel wrote:
> From: David Vrabel <david.vrabel@xxxxxxxxxx>
> 
> Add a simple dom0_mem command line argument.  It's not as flexible as
> the x86 equivalent (the 'max' and 'min' prefixes are not supported).
> 
> Signed-off-by: David Vrabel <david.vrabel@xxxxxxxxxx>
Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>

> ---
>  xen/arch/arm/domain_build.c |   15 +++++++++++++--
>  1 files changed, 13 insertions(+), 2 deletions(-)
> 
> diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
> index b4c0452..5a9bb80 100644
> --- a/xen/arch/arm/domain_build.c
> +++ b/xen/arch/arm/domain_build.c
> @@ -17,6 +17,17 @@
>  static unsigned int __initdata opt_dom0_max_vcpus;
>  integer_param("dom0_max_vcpus", opt_dom0_max_vcpus);
>  
> +#define DOM0_MEM_DEFAULT 0x8000000 /* 128 MiB */
> +static u64 __initdata dom0_mem = DOM0_MEM_DEFAULT;
> +
> +static void __init parse_dom0_mem(const char *s)
> +{
> +    dom0_mem = parse_size_and_unit(s, &s);
> +    if ( dom0_mem == 0 )
> +        dom0_mem = DOM0_MEM_DEFAULT;
> +}
> +custom_param("dom0_mem", parse_dom0_mem);
> +
>  /*
>   * Amount of extra space required to dom0's device tree.  No new nodes
>   * are added (yet) but one terminating reserve map entry (16 bytes) is
> @@ -194,6 +205,8 @@ static int prepare_dtb(struct domain *d, struct 
> kernel_info *kinfo)
>      int new_size;
>      int ret;
>  
> +    kinfo->unassigned_mem = dom0_mem;
> +
>      fdt = device_tree_flattened;
>  
>      new_size = fdt_totalsize(fdt) + DOM0_FDT_EXTRA_SIZE;
> @@ -265,8 +278,6 @@ int construct_dom0(struct domain *d)
>      if ( (rc = p2m_alloc_table(d)) != 0 )
>          return rc;
>  
> -    kinfo.unassigned_mem = 0x08000000; /* XXX */
> -
>      rc = prepare_dtb(d, &kinfo);
>      if ( rc < 0 )
>          return rc;



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