Re: [Qemu-devel] [PATCH v4 02/14] docs: update ivshmem device spec

[Eric Blake <eblake@redhat.com>]

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On 09/02/2014 09:25 AM, David Marchand wrote:
> Add some notes on the parts needed to use ivshmem devices: more specifically,
> explain the purpose of an ivshmem server and the basic concept to use the
> ivshmem devices in guests.
> Move some parts of the documentation and re-organise it.
> 
> Signed-off-by: David Marchand <david.marchand@6wind.com>
> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
> ---
>  docs/specs/ivshmem_device_spec.txt |  124 +++++++++++++++++++++++++++---------
>  1 file changed, 93 insertions(+), 31 deletions(-)
> 

>  
> -The device currently supports 4 registers of 32-bits each.  Registers
> -are used for synchronization between guests sharing the same memory object when
> -interrupts are supported (this requires using the shared memory server).
> +The server must be started on the host before any guest.
> +It creates a shared memory object then waits for clients to connect on an unix
> +socket.

s/an unix/a unix/

>  
> -The server assigns each VM an ID number and sends this ID number to the QEMU
> -process when the guest starts.
> +For each client (QEMU processes) that connects to the server:

s/processes/process/


> +The client IDs are limited to 16 bits because of the current implementation (see
> +Doorbell register in 'PCI device registers' subsection). Hence on 65536 clients

s/on/only/


> +At initialisation, when creating the ivshmem device, QEMU gets its ID from the
> +server then make it available through BAR0 IVPosition register for the VM to use

s/make/makes/

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org


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