Re: [Xen-devel] [PATCH V13 7/7] tools/libxc: Allocate magic page for mem access on ARM

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Fri, 2015-03-06 at 22:24 +0100, Tamas K Lengyel wrote:
> Signed-off-by: Tamas K Lengyel <tklengyel@xxxxxxxxxxxxx>
> Reviewed-by: Julien Grall <julien.grall@xxxxxxxxxx>
> Acked-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>

Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>

> ---
>  tools/libxc/xc_dom_arm.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/libxc/xc_dom_arm.c b/tools/libxc/xc_dom_arm.c
> index c7feca7..aaf835c 100644
> --- a/tools/libxc/xc_dom_arm.c
> +++ b/tools/libxc/xc_dom_arm.c
> @@ -26,9 +26,10 @@
>  #include "xg_private.h"
>  #include "xc_dom.h"
>  
> -#define NR_MAGIC_PAGES 2
> +#define NR_MAGIC_PAGES 3
>  #define CONSOLE_PFN_OFFSET 0
>  #define XENSTORE_PFN_OFFSET 1
> +#define MEMACCESS_PFN_OFFSET 2
>  
>  #define LPAE_SHIFT 9
>  
> @@ -87,10 +88,13 @@ static int alloc_magic_pages(struct xc_dom_image *dom)
>  
>      xc_clear_domain_page(dom->xch, dom->guest_domid, dom->console_pfn);
>      xc_clear_domain_page(dom->xch, dom->guest_domid, dom->xenstore_pfn);
> +    xc_clear_domain_page(dom->xch, dom->guest_domid, base + 
> MEMACCESS_PFN_OFFSET);
>      xc_hvm_param_set(dom->xch, dom->guest_domid, HVM_PARAM_CONSOLE_PFN,
>              dom->console_pfn);
>      xc_hvm_param_set(dom->xch, dom->guest_domid, HVM_PARAM_STORE_PFN,
>              dom->xenstore_pfn);
> +    xc_hvm_param_set(dom->xch, dom->guest_domid, HVM_PARAM_ACCESS_RING_PFN,
> +            base + MEMACCESS_PFN_OFFSET);
>      /* allocated by toolstack */
>      xc_hvm_param_set(dom->xch, dom->guest_domid, HVM_PARAM_CONSOLE_EVTCHN,
>              dom->console_evtchn);



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