Re: [Xen-devel] [PATCH] libxc: correct domain builder for 64 bit guest with 32 bit tools

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Tue, Dec 01, 2015 at 08:49:49AM +0100, Juergen Gross wrote:
> Commit 8c45adec18e0512c3d34dcafb13414ecba21be6a ("create unmapped
> initrd in domain builder if supported") introduced an error for
> building a 64 bit guest with a 32 bit toolset.
> 
> The initrd start address and size where stored in an unsigned long
> instead of using a 64 bit type.
> 
> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
> Tested-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>

Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>

Thanks for fixing this.

> ---
>  tools/libxc/include/xc_dom.h | 11 ++++++++---
>  1 file changed, 8 insertions(+), 3 deletions(-)
> 
> diff --git a/tools/libxc/include/xc_dom.h b/tools/libxc/include/xc_dom.h
> index 2176216..fd8c5e8 100644
> --- a/tools/libxc/include/xc_dom.h
> +++ b/tools/libxc/include/xc_dom.h
> @@ -98,9 +98,14 @@ struct xc_dom_image {
>      xen_vaddr_t virt_alloc_end;
>      xen_vaddr_t bsd_symtab_start;
>  
> -    /* initrd parameters as specified in start_info page */
> -    unsigned long initrd_start;
> -    unsigned long initrd_len;
> +    /*
> +     * initrd parameters as specified in start_info page
> +     * Depending on capabilities of the booted kernel this may be a virtual
> +     * address or a pfn. Type is neutral and large enough to hold a virtual
> +     * address of a 64 bit kernel even with 32 bit toolstack.
> +     */
> +    uint64_t initrd_start;
> +    uint64_t initrd_len;
>  
>      unsigned int alloc_bootstack;
>      xen_vaddr_t virt_pgtab_end;
> -- 
> 2.6.2
> 

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