Re: [Xen-devel] [PATCH v2] xen/arm: Blacklist the memory mapped timer (armv7-timer-mem)

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Wed, 2015-01-14 at 18:00 +0000, Julien Grall wrote:
> Some platform (such as the VFP Base AEMv8 model) has a memory mapped
> timer. We don't want DOM0 use this timer rather than the generic ARM
> timer. So blacklist it for all platforms.
> 
> Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>

Acked + applied.

> 
> ---
>     This patch is candidate to backport for Xen 4.5 and Xen 4.4.
> 
>     It may not apply correctly for Xen 4.4.
> 
>     Changes in v2:
>         - Add a comment in the code to explain why we need to blacklist
>         memory mapped timer
> ---
>  xen/arch/arm/domain_build.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
> index bf8dc78..d5959b5 100644
> --- a/xen/arch/arm/domain_build.c
> +++ b/xen/arch/arm/domain_build.c
> @@ -1047,6 +1047,8 @@ static int handle_node(struct domain *d, struct 
> kernel_info *kinfo,
>          DT_MATCH_COMPATIBLE("arm,psci"),
>          DT_MATCH_PATH("/cpus"),
>          DT_MATCH_TYPE("memory"),
> +        /* The memory mapped timer is not supported by Xen. */
> +        DT_MATCH_COMPATIBLE("arm,armv7-timer-mem"),
>          { /* sentinel */ },
>      };
>      static const struct dt_device_match gic_matches[] __initconst =



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