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Re: [Qemu-devel] [PATCH 1/2] docs: update ivshmem device spec
From: |
Eric Blake |
Subject: |
Re: [Qemu-devel] [PATCH 1/2] docs: update ivshmem device spec |
Date: |
Tue, 24 Jun 2014 10:09:48 -0600 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 |
On 06/20/2014 06:15 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.
>
> Signed-off-by: David Marchand <address@hidden>
> ---
> docs/specs/ivshmem_device_spec.txt | 41
> ++++++++++++++++++++++++++++++------
> 1 file changed, 35 insertions(+), 6 deletions(-)
>
> diff --git a/docs/specs/ivshmem_device_spec.txt
> b/docs/specs/ivshmem_device_spec.txt
> index 667a862..7d2b73f 100644
> --- a/docs/specs/ivshmem_device_spec.txt
> +++ b/docs/specs/ivshmem_device_spec.txt
> @@ -85,12 +85,41 @@ events have occurred. The semantics of interrupt vectors
> are left to the
> user's discretion.
>
>
> +IVSHMEM host services
> +---------------------
> +
> +This part is optional (see *Usage in the Guest* section below).
> +
> +To handle notifications between users of a ivshmem device, a ivshmem server
> has
s/a ivshmem/an ivshmem/ (twice)
> +been added. This server is responsible for creating the shared memory and
> +creating a set of eventfds for each users of the shared memory. It behaves
> as a
> +proxy between the different ivshmem clients (QEMU): giving the shared memory
> fd
> +to each client, allocating eventfds to new clients and broadcasting to all
> +clients when a client disappears.
> +
> +Apart from the current ivshmem implementation in QEMU, a ivshmem client can
> be
and again
> +written for debug, for development purposes, or to implement notifications
> +between host and guests.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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[Qemu-devel] [PATCH 2/2] contrib: add ivshmem client and server, David Marchand, 2014/06/20
Re: [Qemu-devel] [PATCH 0/2] ivshmem: update documentation, add client/server tools, Claudio Fontana, 2014/06/23