From: Stephen Hemminger <stephen@networkplumber.org>
To: Venkateswara Rao Dokku <dvrao.584@gmail.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] Regarding MMIO
Date: Thu, 1 Oct 2015 07:42:28 -0700 [thread overview]
Message-ID: <20151001074228.6c980c96@urahara> (raw)
In-Reply-To: <CACiOAOAJ-aK02yrMC6m8knMdR7gTscRYF7m8Sqh1E4k4=CrwCA@mail.gmail.com>
On Thu, 1 Oct 2015 09:51:42 +0530
Venkateswara Rao Dokku <dvrao.584@gmail.com> wrote:
> Hi,
>
> If we go through the DPDK code it is observed that we are using MMIO for
> Virt-IO devices. But in the Virt-IO specification, it is written that from
> Virt-IO 1.0 onwards only they are supporting MMIO, all previous versions
> uses Port IO for RX/TX notifications.
>
> So, If I use VirtIO 0.9, Can I get the MMIO based notifications for RX/TX
> or is it supported only for Virt-IO 1.0 onwards?
>
Although the virtio device will bind to the mmio address in some cases,
it does not use that. It uses i/o port access (see iopl) to activate
host.
next parent reply other threads:[~2015-10-01 14:42 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CACiOAOAJ-aK02yrMC6m8knMdR7gTscRYF7m8Sqh1E4k4=CrwCA@mail.gmail.com>
2015-10-01 14:42 ` Stephen Hemminger [this message]
2015-10-05 4:40 ` Venkateswara Rao Dokku
2015-10-05 13:39 ` Xie, Huawei
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