Re: [Xen-devel] [PATCH v6 2/2] qdisk - hw/block/xen_disk: grant copy implementation

[Anthony PERARD <anthony.perard@xxxxxxxxxx>]

On Wed, Sep 07, 2016 at 12:41:00PM +0200, Paulina Szubarczyk wrote:
> Copy data operated on during request from/to local buffers to/from
> the grant references.
> 
> Before grant copy operation local buffers must be allocated what is
> done by calling ioreq_init_copy_buffers. For the 'read' operation,
> first, the qemu device invokes the read operation on local buffers
> and on the completion grant copy is called and buffers are freed.
> For the 'write' operation grant copy is performed before invoking
> write by qemu device.
> 
> A new value 'feature_grant_copy' is added to recognize when the
> grant copy operation is supported by a guest.
> 
> Signed-off-by: Paulina Szubarczyk <paulinaszubarczyk@xxxxxxxxx>

Acked-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>

Thanks,

-- 
Anthony PERARD

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