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Re: [Qemu-devel] [PATCH v4 02/14] docs: update ivshmem device spec
From: |
Eric Blake |
Subject: |
Re: [Qemu-devel] [PATCH v4 02/14] docs: update ivshmem device spec |
Date: |
Tue, 02 Sep 2014 14:24:54 -0600 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.7.0 |
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 <address@hidden>
> Reviewed-by: Claudio Fontana <address@hidden>
> ---
> 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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- [Qemu-devel] [PATCH v4 00/14] ivshmem: update documentation, add client/server tools, David Marchand, 2014/09/02
- [Qemu-devel] [PATCH v4 02/14] docs: update ivshmem device spec, David Marchand, 2014/09/02
- Re: [Qemu-devel] [PATCH v4 02/14] docs: update ivshmem device spec,
Eric Blake <=
- [Qemu-devel] [PATCH v4 03/14] contrib/ivshmem-*: comply with QEMU coding style, David Marchand, 2014/09/02
- [Qemu-devel] [PATCH v4 04/14] contrib/ivshmem-*: reuse qemu/queue.h, David Marchand, 2014/09/02
- [Qemu-devel] [PATCH v4 01/14] contrib: add ivshmem client and server, David Marchand, 2014/09/02
- [Qemu-devel] [PATCH v4 05/14] contrib/ivshmem-*: switch to QEMU headers, David Marchand, 2014/09/02
- [Qemu-devel] [PATCH v4 06/14] contrib/ivshmem-server: set client sockets as non blocking, David Marchand, 2014/09/02
- [Qemu-devel] [PATCH v4 08/14] contrib/ivshmem-*: plug client and server in QEMU top Makefile, David Marchand, 2014/09/02
- [Qemu-devel] [PATCH v4 07/14] contrib/ivshmem-*: add missing const and static attrs, David Marchand, 2014/09/02
- [Qemu-devel] [PATCH v4 09/14] contrib/ivshmem-*: switch to g_malloc0/g_free, David Marchand, 2014/09/02