From: "Michael S. Tsirkin" <mst@redhat.com>
To: Jason Wang <jasowang@redhat.com>
Cc: Si-Wei Liu <si-wei.liu@oracle.com>,
netdev@vger.kernel.org, elic@nvidia.com,
linux-kernel@vger.kernel.org,
virtualization@lists.linux-foundation.org
Subject: Re: [PATCH] vdpa/mlx5: set_features should allow reset to zero
Date: Sun, 28 Feb 2021 16:30:08 -0500 [thread overview]
Message-ID: <20210228162909-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <d2992c03-d639-54e3-4599-c168ceeac148@redhat.com>
On Wed, Feb 24, 2021 at 05:30:37PM +0800, Jason Wang wrote:
>
> On 2021/2/24 4:43 下午, Michael S. Tsirkin wrote:
> > On Wed, Feb 24, 2021 at 04:26:43PM +0800, Jason Wang wrote:
> > > Basically on first guest access QEMU would tell kernel whether
> > > guest is using the legacy or the modern interface.
> > > E.g. virtio_pci_config_read/virtio_pci_config_write will call ioctl(ENABLE_LEGACY, 1)
> > > while virtio_pci_common_read will call ioctl(ENABLE_LEGACY, 0)
> > >
> > >
> > > But this trick work only for PCI I think?
> > >
> > > Thanks
> > ccw has a revision it can check. mmio does not have transitional devices
> > at all.
>
>
> Ok, then we can do the workaround in the qemu, isn't it?
>
> Thanks
which one do you mean?
--
MST
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Virtualization mailing list
Virtualization@lists.linux-foundation.org
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WARNING: multiple messages have this Message-ID (diff)
From: "Michael S. Tsirkin" <mst@redhat.com>
To: Jason Wang <jasowang@redhat.com>
Cc: Si-Wei Liu <si-wei.liu@oracle.com>,
elic@nvidia.com, linux-kernel@vger.kernel.org,
virtualization@lists.linux-foundation.org,
netdev@vger.kernel.org
Subject: Re: [PATCH] vdpa/mlx5: set_features should allow reset to zero
Date: Sun, 28 Feb 2021 16:30:08 -0500 [thread overview]
Message-ID: <20210228162909-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <d2992c03-d639-54e3-4599-c168ceeac148@redhat.com>
On Wed, Feb 24, 2021 at 05:30:37PM +0800, Jason Wang wrote:
>
> On 2021/2/24 4:43 下午, Michael S. Tsirkin wrote:
> > On Wed, Feb 24, 2021 at 04:26:43PM +0800, Jason Wang wrote:
> > > Basically on first guest access QEMU would tell kernel whether
> > > guest is using the legacy or the modern interface.
> > > E.g. virtio_pci_config_read/virtio_pci_config_write will call ioctl(ENABLE_LEGACY, 1)
> > > while virtio_pci_common_read will call ioctl(ENABLE_LEGACY, 0)
> > >
> > >
> > > But this trick work only for PCI I think?
> > >
> > > Thanks
> > ccw has a revision it can check. mmio does not have transitional devices
> > at all.
>
>
> Ok, then we can do the workaround in the qemu, isn't it?
>
> Thanks
which one do you mean?
--
MST
next prev parent reply other threads:[~2021-02-28 21:30 UTC|newest]
Thread overview: 196+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-19 11:54 [PATCH] vdpa/mlx5: set_features should allow reset to zero Si-Wei Liu
2021-02-19 11:54 ` Si-Wei Liu
2021-02-21 14:44 ` Eli Cohen
2021-02-21 21:52 ` Michael S. Tsirkin
2021-02-21 21:52 ` Michael S. Tsirkin
2021-02-22 6:05 ` Eli Cohen
2021-02-23 9:26 ` Michael S. Tsirkin
2021-02-23 9:26 ` Michael S. Tsirkin
2021-02-23 9:48 ` Jason Wang
2021-02-23 9:48 ` Jason Wang
2021-02-23 9:55 ` Michael S. Tsirkin
2021-02-23 9:55 ` Michael S. Tsirkin
2021-02-22 4:14 ` Jason Wang
2021-02-22 4:14 ` Jason Wang
2021-02-22 7:34 ` Michael S. Tsirkin
2021-02-22 7:34 ` Michael S. Tsirkin
2021-02-23 1:12 ` Si-Wei Liu
2021-02-23 1:12 ` Si-Wei Liu
2021-02-23 2:03 ` Jason Wang
2021-02-23 2:03 ` Jason Wang
2021-02-23 13:26 ` Michael S. Tsirkin
2021-02-23 13:26 ` Michael S. Tsirkin
2021-02-23 19:35 ` Si-Wei Liu
2021-02-23 19:35 ` Si-Wei Liu
2021-02-24 3:20 ` Jason Wang
2021-02-24 3:20 ` Jason Wang
2021-02-24 5:17 ` Michael S. Tsirkin
2021-02-24 5:17 ` Michael S. Tsirkin
2021-02-24 6:02 ` Jason Wang
2021-02-24 6:02 ` Jason Wang
2021-02-24 6:45 ` Eli Cohen
2021-02-24 6:47 ` Michael S. Tsirkin
2021-02-24 6:47 ` Michael S. Tsirkin
2021-02-24 6:55 ` Jason Wang
2021-02-24 6:55 ` Jason Wang
2021-02-24 7:12 ` Michael S. Tsirkin
2021-02-24 7:12 ` Michael S. Tsirkin
2021-02-24 12:40 ` Eli Cohen
2021-02-24 7:17 ` Eli Cohen
2021-02-24 5:04 ` Michael S. Tsirkin
2021-02-24 5:04 ` Michael S. Tsirkin
2021-02-24 6:04 ` Jason Wang
2021-02-24 6:04 ` Jason Wang
2021-02-24 6:46 ` Michael S. Tsirkin
2021-02-24 6:46 ` Michael S. Tsirkin
2021-02-24 6:53 ` Jason Wang
2021-02-24 6:53 ` Jason Wang
2021-02-24 7:17 ` Michael S. Tsirkin
2021-02-24 7:17 ` Michael S. Tsirkin
2021-02-24 8:26 ` Jason Wang
2021-02-24 8:43 ` Michael S. Tsirkin
2021-02-24 8:43 ` Michael S. Tsirkin
2021-02-24 9:30 ` Jason Wang
2021-02-24 9:30 ` Jason Wang
2021-02-28 21:30 ` Michael S. Tsirkin [this message]
2021-02-28 21:30 ` Michael S. Tsirkin
2021-03-01 3:53 ` Jason Wang
2021-03-01 3:53 ` Jason Wang
2021-02-24 18:24 ` Si-Wei Liu
2021-02-24 18:24 ` Si-Wei Liu
2021-02-26 0:35 ` Si-Wei Liu
2021-02-26 0:56 ` Si-Wei Liu
2021-02-26 0:56 ` Si-Wei Liu
2021-02-28 21:27 ` Michael S. Tsirkin
2021-02-28 21:27 ` Michael S. Tsirkin
2021-03-01 18:08 ` Si-Wei Liu
2021-03-01 18:08 ` Si-Wei Liu
2021-02-28 21:28 ` Michael S. Tsirkin
2021-02-28 21:28 ` Michael S. Tsirkin
2021-02-28 21:34 ` Michael S. Tsirkin
2021-02-28 21:34 ` Michael S. Tsirkin
2021-03-01 3:56 ` Jason Wang
2021-03-01 3:56 ` Jason Wang
2021-03-02 9:47 ` Michael S. Tsirkin
2021-03-02 9:47 ` Michael S. Tsirkin
2021-03-02 10:53 ` Jason Wang
2021-03-02 10:53 ` Jason Wang
2021-12-11 1:44 ` vdpa legacy guest support (was Re: [PATCH] vdpa/mlx5: set_features should allow reset to zero) Si-Wei Liu
2021-12-11 1:44 ` Si-Wei Liu
2021-12-12 9:26 ` Michael S. Tsirkin
2021-12-12 9:26 ` Michael S. Tsirkin
2021-12-13 3:02 ` Jason Wang
2021-12-13 3:02 ` Jason Wang
2021-12-13 8:06 ` Michael S. Tsirkin
2021-12-13 8:06 ` Michael S. Tsirkin
2021-12-13 8:57 ` Jason Wang
2021-12-13 8:57 ` Jason Wang
2021-12-13 10:42 ` Michael S. Tsirkin
2021-12-13 10:42 ` Michael S. Tsirkin
2021-12-14 1:13 ` Si-Wei Liu
2021-12-14 1:13 ` Si-Wei Liu
2021-12-14 1:59 ` Si-Wei Liu
2021-12-14 1:59 ` Si-Wei Liu
2021-12-14 3:01 ` Jason Wang
2021-12-14 3:01 ` Jason Wang
2021-12-14 5:06 ` Michael S. Tsirkin
2021-12-14 5:06 ` Michael S. Tsirkin
2021-12-15 1:05 ` Si-Wei Liu
2021-12-15 1:05 ` Si-Wei Liu
2021-12-15 2:06 ` Jason Wang
2021-12-15 2:06 ` Jason Wang
2021-12-15 20:52 ` Si-Wei Liu
2021-12-15 20:52 ` Si-Wei Liu
2021-12-15 21:33 ` Michael S. Tsirkin
2021-12-15 21:33 ` Michael S. Tsirkin
2021-12-16 2:01 ` Si-Wei Liu
2021-12-16 2:01 ` Si-Wei Liu
2021-12-16 2:53 ` Jason Wang
2021-12-16 2:53 ` Jason Wang
2021-12-16 22:32 ` Si-Wei Liu
2021-12-16 22:32 ` Si-Wei Liu
2021-12-17 1:57 ` Jason Wang
2021-12-17 1:57 ` Jason Wang
2021-12-17 2:00 ` Michael S. Tsirkin
2021-12-17 2:00 ` Michael S. Tsirkin
2021-12-17 2:15 ` Jason Wang
2021-12-17 2:15 ` Jason Wang
2021-12-16 6:35 ` Michael S. Tsirkin
2021-12-16 6:35 ` Michael S. Tsirkin
2021-12-16 3:43 ` Jason Wang
2021-12-16 3:43 ` Jason Wang
2021-12-17 1:08 ` Si-Wei Liu
2021-12-17 1:08 ` Si-Wei Liu
2021-12-17 2:01 ` Jason Wang
2021-12-17 2:01 ` Jason Wang
2021-02-22 17:09 ` [PATCH] vdpa/mlx5: set_features should allow reset to zero Si-Wei Liu
2021-02-22 17:09 ` Si-Wei Liu
2021-02-23 2:03 ` Jason Wang
2021-02-23 2:03 ` Jason Wang
2021-02-23 9:25 ` [virtio-dev] " Michael S. Tsirkin
2021-02-23 9:25 ` Michael S. Tsirkin
2021-02-23 9:25 ` Michael S. Tsirkin
2021-02-23 9:46 ` [virtio-dev] " Jason Wang
2021-02-23 9:46 ` Jason Wang
2021-02-23 9:46 ` Jason Wang
2021-02-23 10:01 ` [virtio-dev] " Michael S. Tsirkin
2021-02-23 10:01 ` Michael S. Tsirkin
2021-02-23 10:01 ` Michael S. Tsirkin
2021-02-23 10:17 ` [virtio-dev] " Jason Wang
2021-02-23 10:17 ` Jason Wang
2021-02-23 10:17 ` Jason Wang
2021-02-24 9:40 ` [virtio-dev] " Jason Wang
2021-02-24 9:40 ` Jason Wang
2021-02-24 9:40 ` Jason Wang
2021-02-23 10:04 ` [virtio-dev] " Cornelia Huck
2021-02-23 10:04 ` Cornelia Huck
2021-02-23 10:04 ` Cornelia Huck
2021-02-23 10:31 ` Jason Wang
2021-02-23 10:31 ` Jason Wang
2021-02-23 10:31 ` Jason Wang
2021-02-23 10:58 ` Cornelia Huck
2021-02-23 10:58 ` Cornelia Huck
2021-02-23 10:58 ` Cornelia Huck
2021-02-24 9:29 ` Jason Wang
2021-02-24 9:29 ` Jason Wang
2021-02-24 9:29 ` Jason Wang
2021-02-24 11:12 ` Cornelia Huck
2021-02-24 11:12 ` Cornelia Huck
2021-02-24 11:12 ` Cornelia Huck
2021-02-25 4:36 ` Jason Wang
2021-02-25 4:36 ` Jason Wang
2021-02-25 4:36 ` Jason Wang
2021-02-25 13:26 ` Cornelia Huck
2021-02-25 13:26 ` Cornelia Huck
2021-02-25 13:26 ` Cornelia Huck
2021-02-25 18:53 ` Michael S. Tsirkin
2021-02-25 18:53 ` Michael S. Tsirkin
2021-02-25 18:53 ` Michael S. Tsirkin
2021-02-26 8:19 ` Jason Wang
2021-02-26 8:19 ` Jason Wang
2021-02-26 8:19 ` Jason Wang
2021-02-28 21:25 ` Michael S. Tsirkin
2021-02-28 21:25 ` Michael S. Tsirkin
2021-02-28 21:25 ` Michael S. Tsirkin
2021-03-01 3:51 ` Jason Wang
2021-03-01 3:51 ` Jason Wang
2021-03-01 3:51 ` Jason Wang
2021-03-02 12:08 ` Cornelia Huck
2021-03-02 12:08 ` Cornelia Huck
2021-03-02 12:08 ` Cornelia Huck
2021-03-03 4:01 ` Jason Wang
2021-03-03 4:01 ` Jason Wang
2021-03-03 8:29 ` Cornelia Huck
2021-03-03 8:29 ` Cornelia Huck
2021-03-03 8:29 ` Cornelia Huck
2021-03-04 8:24 ` Jason Wang
2021-03-04 8:24 ` Jason Wang
2021-03-04 8:24 ` Jason Wang
2021-03-04 13:50 ` Cornelia Huck
2021-03-04 13:50 ` Cornelia Huck
2021-03-04 13:50 ` Cornelia Huck
2021-03-05 3:01 ` Jason Wang
2021-03-05 3:01 ` Jason Wang
2021-03-05 3:01 ` Jason Wang
2021-02-23 12:26 ` Michael S. Tsirkin
2021-02-23 12:26 ` Michael S. Tsirkin
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