devicetree,xen: add xen,shared-memory binding (27b4feb7) · Commits · 戴 / test

Introduce a device tree binding for Xen reserved-memory regions. They are used to share memory across VMs from the VM config files. (See static_shm config option.) Signed-off-by:

Stefano Stabellini <stefanos@xilinx.com> Cc: julien.grall@arm.com Cc: devicetree@vger.kernel.org Cc: robh+dt@kernel.org Cc: mark.rutland@arm.com Cc: xen-devel@lists.xen.org Signed-off-by:

Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/reserved-memory/xen,shared-memory.txt

0 → 100644

+24 −0

Original line number	Diff line number	Diff line
		* Xen hypervisor reserved-memory binding

		Expose one or more memory regions as reserved-memory to the guest
		virtual machine. Typically, a region is configured at VM creation time
		to be a shared memory area across multiple virtual machines for
		communication among them.

		For each of these pre-shared memory regions, a range is exposed under
		the /reserved-memory node as a child node. Each range sub-node is named
		xen-shmem@<address> and has the following properties:

		- compatible:
		compatible = "xen,shared-memory-v1"

		- reg:
		the base guest physical address and size of the shared memory region

		- xen,offset: (borrower VMs only)
		64 bit integer offset within the owner virtual machine's shared
		memory region used for the mapping in the borrower VM.

		- xen,id:
		a string that identifies the shared memory region as specified in
		the VM config file

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