Re: [Xen-devel] [PATCH v4] devicetree, xen: add xen, shared-memory binding

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Mon, 3 Dec 2018, Rob Herring wrote:
> Missing the DT list...

Sorry about that, I'll add it next time


> On Mon, Dec 3, 2018 at 3:43 PM Stefano Stabellini
> <sstabellini@xxxxxxxxxx> wrote:
> >
> > From: Stefano Stabellini <stefanos@xxxxxxxxxx>
> >
> > 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@xxxxxxxxxx>
> > Cc: julien.grall@xxxxxxx
> > ---
> > Changes in v4:
> > - add offset property
> >
> > Changes in v3:
> > - remove fallback version
> >
> > Changes in v2:
> > - fix Author line
> > - add versioning
> > - xen,id instead of id
> > ---
> >  .../bindings/reserved-memory/xen,shared-memory.txt | 24 
> > ++++++++++++++++++++++
> >  1 file changed, 24 insertions(+)
> >  create mode 100644 
> > Documentation/devicetree/bindings/reserved-memory/xen,shared-memory.txt
> >
> > diff --git 
> > a/Documentation/devicetree/bindings/reserved-memory/xen,shared-memory.txt 
> > b/Documentation/devicetree/bindings/reserved-memory/xen,shared-memory.txt
> > new file mode 100644
> > index 0000000..0a35ffc
> > --- /dev/null
> > +++ 
> > b/Documentation/devicetree/bindings/reserved-memory/xen,shared-memory.txt
> > @@ -0,0 +1,24 @@
> > +* 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
> > +
> > +- 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,offset. 'offset' is already used in some other bindings to mean
> register bit offset.

I'll rename it


> > +
> > +- xen,id:
> > +       a string that identifies the shared memory region as specified in
> > +       the VM config file
> > --
> > 1.9.1
> >
> 

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel