From: "Michael S. Tsirkin" <mst@redhat.com>
To: Parav Pandit <parav@nvidia.com>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
Maor Gottlieb <maorg@nvidia.com>,
"virtualization@lists.linux-foundation.org"
<virtualization@lists.linux-foundation.org>,
Jason Gunthorpe <jgg@nvidia.com>, Jiri Pirko <jiri@nvidia.com>,
Leon Romanovsky <leonro@nvidia.com>
Subject: Re: [PATCH vfio 11/11] vfio/virtio: Introduce a vfio driver over virtio devices
Date: Fri, 22 Sep 2023 11:13:18 -0400 [thread overview]
Message-ID: <20230922111132-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <PH0PR12MB548127753F25C45B7EFF203DDCFFA@PH0PR12MB5481.namprd12.prod.outlook.com>
On Fri, Sep 22, 2023 at 12:25:06PM +0000, Parav Pandit wrote:
>
> > From: Jason Gunthorpe <jgg@nvidia.com>
> > Sent: Friday, September 22, 2023 5:53 PM
>
>
> > > And what's more, using MMIO BAR0 then it can work for legacy.
> >
> > Oh? How? Our team didn't think so.
>
> It does not. It was already discussed.
> The device reset in legacy is not synchronous.
> The drivers do not wait for reset to complete; it was written for the sw backend.
> Hence MMIO BAR0 is not the best option in real implementations.
Or maybe they made it synchronous in hardware, that's all.
After all same is true for the IO BAR0 e.g. for the PF: IO writes are posted anyway.
Whether that's possible would depend on the hardware architecture.
--
MST
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Virtualization mailing list
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next prev parent reply other threads:[~2023-09-22 15:13 UTC|newest]
Thread overview: 140+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-21 12:40 [PATCH vfio 00/11] Introduce a vfio driver over virtio devices Yishai Hadas via Virtualization
2023-09-21 12:40 ` [PATCH vfio 01/11] virtio-pci: Use virtio pci device layer vq info instead of generic one Yishai Hadas via Virtualization
2023-09-21 13:46 ` Michael S. Tsirkin
2023-09-26 19:13 ` Feng Liu via Virtualization
2023-09-27 18:09 ` Feng Liu via Virtualization
2023-09-27 21:24 ` Michael S. Tsirkin
2023-09-21 12:40 ` [PATCH vfio 02/11] virtio: Define feature bit for administration virtqueue Yishai Hadas via Virtualization
2023-09-21 12:40 ` [PATCH vfio 03/11] virtio-pci: Introduce admin virtqueue Yishai Hadas via Virtualization
2023-09-21 13:57 ` Michael S. Tsirkin
2023-09-26 19:23 ` Feng Liu via Virtualization
2023-09-27 18:12 ` Feng Liu via Virtualization
2023-09-27 21:27 ` Michael S. Tsirkin
2023-10-02 18:07 ` Feng Liu via Virtualization
2023-09-21 12:40 ` [PATCH vfio 04/11] virtio: Expose the synchronous command helper function Yishai Hadas via Virtualization
2023-09-21 12:40 ` [PATCH vfio 05/11] virtio-pci: Introduce admin command sending function Yishai Hadas via Virtualization
2023-09-21 12:40 ` [PATCH vfio 06/11] virtio-pci: Introduce API to get PF virtio device from VF PCI device Yishai Hadas via Virtualization
2023-09-21 12:40 ` [PATCH vfio 07/11] virtio-pci: Introduce admin commands Yishai Hadas via Virtualization
2023-09-24 5:18 ` kernel test robot
2023-09-25 3:18 ` kernel test robot
2023-09-21 12:40 ` [PATCH vfio 08/11] vfio/pci: Expose vfio_pci_core_setup_barmap() Yishai Hadas via Virtualization
2023-09-21 16:35 ` Alex Williamson
2023-09-26 9:45 ` Yishai Hadas via Virtualization
2023-09-21 12:40 ` [PATCH vfio 09/11] vfio/pci: Expose vfio_pci_iowrite/read##size() Yishai Hadas via Virtualization
2023-09-21 12:40 ` [PATCH vfio 10/11] vfio/virtio: Expose admin commands over virtio device Yishai Hadas via Virtualization
2023-09-21 13:08 ` Michael S. Tsirkin
2023-09-21 20:34 ` Michael S. Tsirkin
2023-09-26 10:51 ` Yishai Hadas via Virtualization
2023-09-26 11:25 ` Michael S. Tsirkin
2023-09-22 9:54 ` Michael S. Tsirkin
2023-09-26 11:14 ` Yishai Hadas via Virtualization
2023-09-26 11:41 ` Michael S. Tsirkin
[not found] ` <20230927131817.GA338226@nvidia.com>
2023-09-27 21:30 ` Michael S. Tsirkin
[not found] ` <20230927231600.GD339126@nvidia.com>
2023-09-28 5:26 ` Michael S. Tsirkin
2023-10-02 6:28 ` Christoph Hellwig
[not found] ` <20231002151320.GA650762@nvidia.com>
2023-10-05 8:49 ` Christoph Hellwig
[not found] ` <20231005111004.GK682044@nvidia.com>
2023-10-06 13:09 ` Christoph Hellwig
[not found] ` <20231010131031.GJ3952@nvidia.com>
2023-10-10 13:56 ` Michael S. Tsirkin
[not found] ` <20231010140849.GL3952@nvidia.com>
2023-10-10 14:54 ` Michael S. Tsirkin
2023-10-10 15:09 ` Yishai Hadas via Virtualization
2023-10-10 15:14 ` Michael S. Tsirkin
2023-10-10 15:43 ` Yishai Hadas via Virtualization
2023-10-10 15:58 ` Parav Pandit via Virtualization
2023-10-10 15:58 ` Michael S. Tsirkin
2023-10-10 16:09 ` Yishai Hadas via Virtualization
2023-10-10 20:42 ` Michael S. Tsirkin
2023-10-11 7:44 ` Yishai Hadas via Virtualization
2023-10-11 8:02 ` Michael S. Tsirkin
2023-10-11 8:58 ` Yishai Hadas via Virtualization
2023-10-11 9:03 ` Michael S. Tsirkin
2023-10-11 11:25 ` Yishai Hadas via Virtualization
2023-10-11 6:12 ` Christoph Hellwig
[not found] ` <20231010155937.GN3952@nvidia.com>
2023-10-10 16:03 ` Michael S. Tsirkin
[not found] ` <20231010160712.GO3952@nvidia.com>
2023-10-10 16:21 ` Parav Pandit via Virtualization
2023-10-10 20:38 ` Michael S. Tsirkin
2023-10-11 6:13 ` Christoph Hellwig
2023-10-11 6:43 ` Michael S. Tsirkin
2023-10-11 6:59 ` Christoph Hellwig
2023-10-11 8:00 ` Parav Pandit via Virtualization
2023-10-11 8:10 ` Michael S. Tsirkin
[not found] ` <20231011121849.GV3952@nvidia.com>
2023-10-11 17:03 ` Michael S. Tsirkin
2023-10-11 17:05 ` Michael S. Tsirkin
2023-10-12 10:29 ` Zhu, Lingshan
[not found] ` <20231012132749.GK3952@nvidia.com>
2023-10-13 10:28 ` Zhu, Lingshan
2023-10-13 13:50 ` Michael S. Tsirkin
2023-10-16 8:33 ` Zhu, Lingshan
2023-10-16 8:52 ` Michael S. Tsirkin
2023-10-16 9:53 ` Zhu, Lingshan
2023-10-11 8:12 ` Michael S. Tsirkin
2023-10-12 10:30 ` Zhu, Lingshan
2023-10-11 6:26 ` Christoph Hellwig
[not found] ` <20231011135709.GW3952@nvidia.com>
2023-10-11 14:17 ` Christoph Hellwig
[not found] ` <20231011145810.GZ3952@nvidia.com>
2023-10-11 16:59 ` Michael S. Tsirkin
[not found] ` <20231011171944.GA3952@nvidia.com>
2023-10-11 20:20 ` Michael S. Tsirkin
2023-09-21 12:40 ` [PATCH vfio 11/11] vfio/virtio: Introduce a vfio driver over virtio devices Yishai Hadas via Virtualization
2023-09-21 13:16 ` Michael S. Tsirkin
[not found] ` <20230921141125.GM13733@nvidia.com>
2023-09-21 14:16 ` Michael S. Tsirkin
[not found] ` <20230921164139.GP13733@nvidia.com>
2023-09-21 16:53 ` Michael S. Tsirkin
[not found] ` <20230921183926.GV13733@nvidia.com>
2023-09-21 19:13 ` Michael S. Tsirkin
[not found] ` <20230921194946.GX13733@nvidia.com>
2023-09-21 20:45 ` Michael S. Tsirkin
[not found] ` <20230921225526.GE13733@nvidia.com>
2023-09-22 3:02 ` Jason Wang
2023-09-22 11:23 ` Michael S. Tsirkin
2023-09-22 3:01 ` Jason Wang
[not found] ` <20230922121132.GK13733@nvidia.com>
2023-09-25 2:34 ` Jason Wang
[not found] ` <20230925122607.GW13733@nvidia.com>
2023-09-25 19:44 ` Michael S. Tsirkin
[not found] ` <20230926004059.GM13733@nvidia.com>
2023-09-26 5:34 ` Michael S. Tsirkin
2023-09-26 5:42 ` Michael S. Tsirkin
[not found] ` <20230926135057.GO13733@nvidia.com>
2023-09-27 21:38 ` Michael S. Tsirkin
[not found] ` <20230927232005.GE339126@nvidia.com>
2023-09-28 5:31 ` Michael S. Tsirkin
2023-09-26 4:37 ` Jason Wang
2023-09-26 5:33 ` Parav Pandit via Virtualization
2023-09-21 19:17 ` Michael S. Tsirkin
[not found] ` <20230921195115.GY13733@nvidia.com>
2023-09-21 20:55 ` Michael S. Tsirkin
2023-09-25 4:44 ` Zhu, Lingshan
2023-09-22 3:45 ` Zhu, Lingshan
2023-09-21 13:33 ` Michael S. Tsirkin
2023-09-21 16:43 ` Alex Williamson
[not found] ` <20230921165224.GR13733@nvidia.com>
2023-09-21 17:01 ` Michael S. Tsirkin
2023-09-21 17:09 ` Parav Pandit via Virtualization
2023-09-21 17:24 ` Michael S. Tsirkin
[not found] ` <20230921170709.GS13733@nvidia.com>
2023-09-21 17:21 ` Michael S. Tsirkin
[not found] ` <20230921174450.GT13733@nvidia.com>
2023-09-21 17:55 ` Michael S. Tsirkin
[not found] ` <20230921181637.GU13733@nvidia.com>
2023-09-21 19:34 ` Michael S. Tsirkin
[not found] ` <20230921195345.GZ13733@nvidia.com>
2023-09-21 20:16 ` Michael S. Tsirkin
2023-09-22 3:02 ` Jason Wang
[not found] ` <20230922122246.GN13733@nvidia.com>
2023-09-22 12:25 ` Parav Pandit via Virtualization
2023-09-22 15:13 ` Michael S. Tsirkin [this message]
[not found] ` <20230922151534.GR13733@nvidia.com>
2023-09-22 15:40 ` Michael S. Tsirkin
[not found] ` <20230922162233.GT13733@nvidia.com>
2023-09-25 17:36 ` Michael S. Tsirkin
2023-09-25 2:30 ` Jason Wang
2023-09-25 8:26 ` Parav Pandit via Virtualization
2023-09-25 18:36 ` Michael S. Tsirkin
2023-09-26 2:34 ` Zhu, Lingshan
2023-09-26 3:45 ` Parav Pandit via Virtualization
2023-09-26 4:37 ` Jason Wang
2023-10-12 10:52 ` Michael S. Tsirkin
2023-10-12 11:11 ` Parav Pandit via Virtualization
2023-10-12 11:30 ` Michael S. Tsirkin
2023-10-12 11:40 ` Parav Pandit via Virtualization
2023-09-26 2:32 ` Jason Wang
2023-09-26 4:01 ` Parav Pandit via Virtualization
2023-09-26 4:37 ` Jason Wang
2023-09-26 5:27 ` Parav Pandit via Virtualization
2023-09-26 11:49 ` Michael S. Tsirkin
2023-10-08 4:28 ` Jason Wang
[not found] ` <20230921224836.GD13733@nvidia.com>
2023-09-22 9:47 ` Michael S. Tsirkin
[not found] ` <20230922122328.GO13733@nvidia.com>
2023-09-22 15:45 ` Michael S. Tsirkin
2023-09-22 3:02 ` Jason Wang
[not found] ` <20230922122501.GP13733@nvidia.com>
2023-09-22 15:39 ` Michael S. Tsirkin
[not found] ` <20230922161928.GS13733@nvidia.com>
2023-09-25 18:16 ` Michael S. Tsirkin
[not found] ` <20230925185318.GK13733@nvidia.com>
2023-09-25 19:52 ` Michael S. Tsirkin
2023-09-21 19:58 ` Alex Williamson
[not found] ` <20230921200121.GA13733@nvidia.com>
2023-09-21 20:20 ` Michael S. Tsirkin
2023-09-21 20:59 ` Alex Williamson
[not found] ` <20230922123708.GA130749@nvidia.com>
2023-09-22 12:59 ` Parav Pandit via Virtualization
2023-09-26 15:20 ` Yishai Hadas via Virtualization
2023-09-26 17:00 ` Michael S. Tsirkin
2023-10-02 4:38 ` Parav Pandit via Virtualization
2023-09-22 10:10 ` Michael S. Tsirkin
2023-09-22 15:53 ` Michael S. Tsirkin
2023-10-02 11:23 ` Parav Pandit via Virtualization
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