linux-kernel - Re: [PATCH v5 06/17] docs: Xen ARM DT bindings

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Message-ID: <5057E375.2050103@gmail.com>
Date:	Mon, 17 Sep 2012 21:59:01 -0500
From:	Rob Herring <robherring2@...il.com>
To:	Stefano Stabellini <stefano.stabellini@...citrix.com>
CC:	arnd@...db.de, linux@....linux.org.uk, linaro-dev@...ts.linaro.org,
	linux-arm-kernel@...ts.infradead.org, tim@....org,
	Ian.Campbell@...rix.com, konrad.wilk@...cle.com,
	xen-devel@...ts.xensource.com, linux-kernel@...r.kernel.org,
	devicetree-discuss@...ts.ozlabs.org,
	David Vrabel <david.vrabel@...rix.com>,
	Dave Martin <dave.martin@...aro.org>
Subject: Re: [PATCH v5 06/17] docs: Xen ARM DT bindings

On 09/17/2012 12:38 PM, Stefano Stabellini wrote:
> Add a doc to describe the Xen ARM device tree bindings
> 
> 
> Changes in v5:
> 
> - add a comment about the size of the grant table memory region;
> - add a comment about the required presence of a GIC node;
> - specify that the described properties are part of a top-level
> "hypervisor" node;
> - specify #address-cells and #size-cells for the example.
> 
> 
> Changes in v4:
> 
> - "xen,xen" should be last as it is less specific;
> - update reg property using 2 address-cells and 2 size-cells.
> 
> 
> Signed-off-by: Stefano Stabellini <stefano.stabellini@...citrix.com>
> CC: devicetree-discuss@...ts.ozlabs.org
> CC: David Vrabel <david.vrabel@...rix.com>
> CC: Rob Herring <robherring2@...il.com>
> CC: Dave Martin <dave.martin@...aro.org>

This is so minimal now and it doesn't seem to have any overlap with kvm, so:

Acked-by: Rob Herring <rob.herring@...xeda.com>

> ---
>  Documentation/devicetree/bindings/arm/xen.txt |   25 +++++++++++++++++++++++++
>  1 files changed, 25 insertions(+), 0 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/arm/xen.txt
> 
> diff --git a/Documentation/devicetree/bindings/arm/xen.txt b/Documentation/devicetree/bindings/arm/xen.txt
> new file mode 100644
> index 0000000..0f7b9c2
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/arm/xen.txt
> @@ -0,0 +1,25 @@
> +* Xen hypervisor device tree bindings
> +
> +Xen ARM virtual platforms shall have a top-level "hypervisor" node with
> +the following properties:
> +
> +- compatible:
> +	compatible = "xen,xen-<version>", "xen,xen";
> +  where <version> is the version of the Xen ABI of the platform.
> +
> +- reg: specifies the base physical address and size of a region in
> +  memory where the grant table should be mapped to, using an
> +  HYPERVISOR_memory_op hypercall. The memory region is large enough to map
> +  the whole grant table (it is larger or equal to gnttab_max_grant_frames()).
> +
> +- interrupts: the interrupt used by Xen to inject event notifications.
> +  A GIC node is also required.
> +
> +
> +Example (assuming #address-cells = <2> and #size-cells = <2>):
> +
> +hypervisor {
> +	compatible = "xen,xen-4.3", "xen,xen";
> +	reg = <0 0xb0000000 0 0x20000>;
> +	interrupts = <1 15 0xf08>;
> +};
> 

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