From: Max Gurtovoy <mgurtovoy@nvidia.com>
To: Christoph Hellwig <hch@lst.de>
Cc: Jason Gunthorpe <jgg@ziepe.ca>, Lei Rao <lei.rao@intel.com>,
kbusch@kernel.org, axboe@fb.com, kch@nvidia.com,
sagi@grimberg.me, alex.williamson@redhat.com, cohuck@redhat.com,
yishaih@nvidia.com, shameerali.kolothum.thodi@huawei.com,
kevin.tian@intel.com, mjrosato@linux.ibm.com,
linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org,
kvm@vger.kernel.org, eddie.dong@intel.com, yadong.li@intel.com,
yi.l.liu@intel.com, Konrad.wilk@oracle.com,
stephen@eideticom.com, hang.yuan@intel.com,
Oren Duer <oren@nvidia.com>
Subject: Re: [RFC PATCH 1/5] nvme-pci: add function nvme_submit_vf_cmd to issue admin commands for VF driver.
Date: Mon, 12 Dec 2022 16:49:19 +0200 [thread overview]
Message-ID: <588a8c42-b597-1c9b-f7d3-2ac10ead7ac2@nvidia.com> (raw)
In-Reply-To: <20221212075541.GC11162@lst.de>
On 12/12/2022 9:55 AM, Christoph Hellwig wrote:
> On Sun, Dec 11, 2022 at 01:39:37PM +0200, Max Gurtovoy wrote:
>> 1. Need to define a concept of a "virtual subsystem". A primary controller
>> will be able to create a virtual subsystem. Inside this subsystem the
>> primary controller will be the master ("the controlling") of the migration
>> process. It will also be able to add secondary controllers to this virtual
>> subsystem and assign "virtual controller ID" to it.
>> something like:
>> - nvme virtual_subsys_create --dev=/dev/nvme1 --virtual_nqn="my_v_nqn_1"
>> --dev_vcid = 1
>> - nvme virtual_subsys_add --dev=/dev/nvme1 --virtual_nqn="my_v_nqn_1"
>> --secondary_dev=/dev/nvme2 --secondary_dev_vcid=20
> Yes. Note that there is a bit more state than just the NQN. You also
> need at least a serial number, and also probably a different vendor
> ID (the PCI vendor ID that is also mirror in Identify Controller and
> the IEEE OUI), and new unique namespace identifier.
Yes for sure there is more bits we should consider.
I wanted to describe the high level.
I think that we can maybe say the when a secondary function is moved to
a virtual subsystem its feature set of the virtual ctrl is narrowed to
mandatory NVMe features set.
And we'll provide an API to set/extend it's feature set to a maximum of
the feature set that the original ctrl of the secondary function had.
Then the sys admin will configure the virtual ctrl in both src/dst hosts.
The high level idea is to have a programmable way to set the features of
a virtual controller inside a virtual subsystem that is also programmable.
next prev parent reply other threads:[~2022-12-12 14:49 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-06 5:58 [RFC PATCH 0/5] Add new VFIO PCI driver for NVMe devices Lei Rao
2022-12-06 5:58 ` [RFC PATCH 1/5] nvme-pci: add function nvme_submit_vf_cmd to issue admin commands for VF driver Lei Rao
2022-12-06 6:19 ` Christoph Hellwig
2022-12-06 13:44 ` Jason Gunthorpe
2022-12-06 13:51 ` Keith Busch
2022-12-06 14:27 ` Jason Gunthorpe
2022-12-06 13:58 ` Christoph Hellwig
2022-12-06 15:22 ` Jason Gunthorpe
2022-12-06 15:38 ` Christoph Hellwig
2022-12-06 15:51 ` Jason Gunthorpe
2022-12-06 16:55 ` Christoph Hellwig
2022-12-06 19:15 ` Jason Gunthorpe
2022-12-07 2:30 ` Max Gurtovoy
2022-12-07 7:58 ` Christoph Hellwig
2022-12-09 2:11 ` Tian, Kevin
2022-12-12 7:41 ` Christoph Hellwig
2022-12-07 7:54 ` Christoph Hellwig
2022-12-07 10:59 ` Max Gurtovoy
2022-12-07 13:46 ` Christoph Hellwig
2022-12-07 14:50 ` Max Gurtovoy
2022-12-07 16:35 ` Christoph Hellwig
2022-12-07 13:34 ` Jason Gunthorpe
2022-12-07 13:52 ` Christoph Hellwig
2022-12-07 15:07 ` Jason Gunthorpe
2022-12-07 16:38 ` Christoph Hellwig
2022-12-07 17:31 ` Jason Gunthorpe
2022-12-07 18:33 ` Christoph Hellwig
2022-12-07 20:08 ` Jason Gunthorpe
2022-12-09 2:50 ` Tian, Kevin
2022-12-09 18:56 ` Dong, Eddie
2022-12-11 11:39 ` Max Gurtovoy
2022-12-12 7:55 ` Christoph Hellwig
2022-12-12 14:49 ` Max Gurtovoy [this message]
2022-12-12 7:50 ` Christoph Hellwig
2022-12-13 14:01 ` Jason Gunthorpe
2022-12-13 16:08 ` Christoph Hellwig
2022-12-13 17:49 ` Jason Gunthorpe
2022-12-06 5:58 ` [RFC PATCH 2/5] nvme-vfio: add new vfio-pci driver for NVMe device Lei Rao
2022-12-06 5:58 ` [RFC PATCH 3/5] nvme-vfio: enable the function of VFIO live migration Lei Rao
2023-01-19 10:21 ` Max Gurtovoy
2023-02-09 9:09 ` Rao, Lei
2022-12-06 5:58 ` [RFC PATCH 4/5] nvme-vfio: check if the hardware supports " Lei Rao
2022-12-06 13:47 ` Keith Busch
2022-12-06 5:58 ` [RFC PATCH 5/5] nvme-vfio: Add a document for the NVMe device Lei Rao
2022-12-06 6:26 ` Christoph Hellwig
2022-12-06 13:05 ` Jason Gunthorpe
2022-12-06 13:09 ` Christoph Hellwig
2022-12-06 13:52 ` Jason Gunthorpe
2022-12-06 14:00 ` Christoph Hellwig
2022-12-06 14:20 ` Jason Gunthorpe
2022-12-06 14:31 ` Christoph Hellwig
2022-12-06 14:48 ` Jason Gunthorpe
2022-12-06 15:01 ` Christoph Hellwig
2022-12-06 15:28 ` Jason Gunthorpe
2022-12-06 15:35 ` Christoph Hellwig
2022-12-06 18:00 ` Dong, Eddie
2022-12-12 7:57 ` Christoph Hellwig
2022-12-11 12:05 ` Max Gurtovoy
2022-12-11 13:21 ` Rao, Lei
2022-12-11 14:51 ` Max Gurtovoy
2022-12-12 1:20 ` Rao, Lei
2022-12-12 8:09 ` Christoph Hellwig
2022-12-09 2:05 ` Tian, Kevin
2022-12-09 16:53 ` Li, Yadong
2022-12-12 8:11 ` Christoph Hellwig
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