From: "Tian, Kevin" <kevin.tian@intel.com>
To: Kenneth Lee <liguozhu@hisilicon.com>
Cc: Kenneth Lee <nek.in.cn@gmail.com>,
Herbert Xu <herbert@gondor.apana.org.au>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
Jonathan Corbet <corbet@lwn.net>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
"Kumar, Sanjay K" <sanjay.k.kumar@intel.com>,
Hao Fang <fanghao11@huawei.com>,
"iommu@lists.linux-foundation.org"
<iommu@lists.linux-foundation.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linuxarm@huawei.com" <linuxarm@huawei.com>,
Alex Williamson <alex.williamson@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
"linux-crypto@vger.kernel.org" <linux-crypto@vger.kernel.org>,
Philippe Ombredanne <pombredanne@nexb.com>,
Zaibo Xu <xuzaibo@huawei.com>,
"David S . Miller" <davem@davemloft.net>,
"linux-accelerators@lists.ozlabs.org"
<linux-accelerators@lists.ozlabs.org>
Subject: RE: [RFC PATCH 0/7] A General Accelerator Framework, WarpDrive
Date: Thu, 2 Aug 2018 04:36:52 +0000 [thread overview]
Message-ID: <AADFC41AFE54684AB9EE6CBC0274A5D19129105A@SHSMSX101.ccr.corp.intel.com> (raw)
In-Reply-To: <20180802034006.GJ160746@Turing-Arch-b>
> From: Kenneth Lee
> Sent: Thursday, August 2, 2018 11:40 AM
>
> On Thu, Aug 02, 2018 at 02:59:33AM +0000, Tian, Kevin wrote:
> > > From: Kenneth Lee
> > > Sent: Wednesday, August 1, 2018 6:22 PM
> > >
> > > From: Kenneth Lee <liguozhu@hisilicon.com>
> > >
> > > WarpDrive is an accelerator framework to expose the hardware
> capabilities
> > > directly to the user space. It makes use of the exist vfio and vfio-mdev
> > > facilities. So the user application can send request and DMA to the
> > > hardware without interaction with the kernel. This remove the latency
> > > of syscall and context switch.
> > >
> > > The patchset contains documents for the detail. Please refer to it for
> more
> > > information.
> > >
> > > This patchset is intended to be used with Jean Philippe Brucker's SVA
> > > patch [1] (Which is also in RFC stage). But it is not mandatory. This
> > > patchset is tested in the latest mainline kernel without the SVA patches.
> > > So it support only one process for each accelerator.
> >
> > If no sharing, then why not just assigning the whole parent device to
> > the process? IMO if SVA usage is the clear goal of your series, it
> > might be made clearly so then Jean's series is mandatory dependency...
> >
>
> We don't know how SVA will be finally. But the feature, "make use of
> per-PASID/substream ID IOMMU page table", should be able to be enabled
> in the
> kernel. So we don't want to enforce it here. After we have this serial ready,
> it
> can be hooked to any implementation.
"any" or "only queue-based" implementation? some devices may not
have queue concept, e.g. GPU.
>
> Further more, even without "per-PASID IOMMU page table", this series has
> its
> value. It is not simply dedicate the whole device to the process. It "shares"
> the device with the kernel driver. So you can support crypto and a user
> application at the same time.
OK.
Thanks
Kevin
next prev parent reply other threads:[~2018-08-02 4:37 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-01 10:22 [RFC PATCH 0/7] A General Accelerator Framework, WarpDrive Kenneth Lee
2018-08-01 10:22 ` [RFC PATCH 1/7] vfio/spimdev: Add documents for WarpDrive framework Kenneth Lee
2018-08-02 3:14 ` Tian, Kevin
2018-08-02 4:22 ` Kenneth Lee
2018-08-02 4:41 ` Tian, Kevin
2018-08-06 12:27 ` Pavel Machek
2018-08-08 1:43 ` Kenneth Lee
2018-08-01 10:22 ` [RFC PATCH 2/7] iommu: Add share domain interface in iommu for spimdev Kenneth Lee
2018-08-02 3:17 ` Tian, Kevin
2018-08-02 4:15 ` Kenneth Lee
2018-08-02 4:39 ` Tian, Kevin
2018-08-08 9:13 ` Joerg Roedel
2018-08-09 1:09 ` Kenneth Lee
2018-08-01 10:22 ` [RFC PATCH 3/7] vfio: add spimdev support Kenneth Lee
2018-08-01 16:23 ` Randy Dunlap
2018-08-02 3:07 ` Kenneth Lee
2018-08-02 3:21 ` Tian, Kevin
2018-08-02 3:47 ` Kenneth Lee
2018-08-02 4:24 ` Tian, Kevin
2018-08-02 7:34 ` Kenneth Lee
[not found] ` <20180802103528.0b863030.cohuck@redhat.com>
[not found] ` <20180802124327.403b10ab@t450s.home>
2018-08-06 1:40 ` Kenneth Lee
2018-08-06 15:49 ` Alex Williamson
2018-08-06 16:34 ` Raj, Ashok
2018-08-06 17:05 ` Alex Williamson
2018-08-08 1:32 ` Kenneth Lee
2018-08-01 10:22 ` [RFC PATCH 4/7] crypto: add hisilicon Queue Manager driver Kenneth Lee
2018-08-01 10:22 ` [RFC PATCH 5/7] crypto: Add Hisilicon Zip driver Kenneth Lee
2018-08-01 10:22 ` [RFC PATCH 6/7] crypto: add spimdev support to Hisilicon QM Kenneth Lee
2018-08-01 10:22 ` [RFC PATCH 7/7] vfio/spimdev: add user sample for spimdev Kenneth Lee
2018-08-01 16:56 ` [RFC PATCH 0/7] A General Accelerator Framework, WarpDrive Jerome Glisse
2018-08-02 2:33 ` Tian, Kevin
2018-08-02 4:05 ` Kenneth Lee
2018-08-02 14:22 ` Jerome Glisse
2018-08-03 3:47 ` Kenneth Lee
2018-08-03 14:39 ` Jerome Glisse
2018-08-06 3:12 ` Kenneth Lee
2018-08-06 15:32 ` Jerome Glisse
2018-08-08 1:08 ` Kenneth Lee
2018-08-08 15:18 ` Jerome Glisse
2018-08-09 8:03 ` Kenneth Lee
2018-08-09 8:31 ` Tian, Kevin
2018-08-10 1:37 ` Kenneth Lee
2018-08-09 14:46 ` Jerome Glisse
2018-08-10 3:39 ` Kenneth Lee
2018-08-10 13:12 ` Jean-Philippe Brucker
2018-08-11 15:26 ` Kenneth Lee
2018-08-13 9:29 ` Kenneth Lee
2018-08-13 19:23 ` Jerome Glisse
2018-08-14 3:46 ` Kenneth Lee
2018-08-10 14:32 ` Jerome Glisse
2018-08-11 14:44 ` Kenneth Lee
2018-08-02 10:10 ` Alan Cox
2018-08-02 12:24 ` Xu Zaibo
2018-08-02 14:46 ` Jerome Glisse
2018-08-03 14:20 ` Alan Cox
2018-08-03 14:55 ` Jerome Glisse
2018-08-06 1:26 ` Kenneth Lee
2018-08-02 2:59 ` Tian, Kevin
2018-08-02 3:40 ` Kenneth Lee
2018-08-02 4:36 ` Tian, Kevin [this message]
2018-08-02 5:35 ` Kenneth Lee
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