From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Michael S. Tsirkin" <mst@redhat.com>
Subject: Re: [PATCH 0/2] uio_msi: device driver
Date: Thu, 1 Oct 2015 11:36:41 +0300
Message-ID: <20151001113337-mutt-send-email-mst@redhat.com>
References: <1443652138-31782-1-git-send-email-stephen@networkplumber.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Cc: dev@dpdk.org, hjk@hansjkoch.de, gregkh@linux-foundation.org,
 linux-kernel@vger.kernel.org
To: Stephen Hemminger <stephen@networkplumber.org>
Return-path: <dev-bounces@dpdk.org>
Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28])
 by dpdk.org (Postfix) with ESMTP id C74338E5A
 for <dev@dpdk.org>; Thu,  1 Oct 2015 10:36:46 +0200 (CEST)
Content-Disposition: inline
In-Reply-To: <1443652138-31782-1-git-send-email-stephen@networkplumber.org>
List-Id: patches and discussions about DPDK <dev.dpdk.org>
List-Unsubscribe: <http://dpdk.org/ml/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <http://dpdk.org/ml/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
Errors-To: dev-bounces@dpdk.org
Sender: "dev" <dev-bounces@dpdk.org>

On Wed, Sep 30, 2015 at 03:28:56PM -0700, Stephen Hemminger wrote:
> This is a new UIO device driver to allow supporting MSI-X and MSI devices
> in userspace.  It has been used in environments like VMware and older versions
> of QEMU/KVM where no IOMMU support is available.
> 
> Stephen Hemminger (2):
> 
> *** BLURB HERE ***

I think this needs some more work to make sure
userspace can drive devices without a risk of
crashing the kernel even when there's no IOMMU.

I sent some comments in response to the patch itself.

Please copy me on future versions of this driver.

Thanks!

> Stephen Hemminger (2):
>   uio: add support for ioctls
>   uio: new driver to support PCI MSI-X
> 
>  drivers/uio/Kconfig          |   9 ++
>  drivers/uio/Makefile         |   1 +
>  drivers/uio/uio.c            |  15 ++
>  drivers/uio/uio_msi.c        | 378 +++++++++++++++++++++++++++++++++++++++++++
>  include/linux/uio_driver.h   |   3 +
>  include/uapi/linux/Kbuild    |   1 +
>  include/uapi/linux/uio_msi.h |  22 +++
>  7 files changed, 429 insertions(+)
>  create mode 100644 drivers/uio/uio_msi.c
>  create mode 100644 include/uapi/linux/uio_msi.h
> 
> -- 
> 2.1.4
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/