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Re: [PATCH] Add a new PIIX option to control PCI hot unplugging of devic
From: |
Michael S. Tsirkin |
Subject: |
Re: [PATCH] Add a new PIIX option to control PCI hot unplugging of devices on non-root buses |
Date: |
Mon, 20 Apr 2020 11:02:22 -0400 |
On Mon, Apr 20, 2020 at 10:24:59AM +0100, Daniel P. Berrangé wrote:
> On Fri, Apr 17, 2020 at 12:09:00PM -0400, Michael S. Tsirkin wrote:
> > On Fri, Apr 17, 2020 at 03:36:14PM +0000, Ani Sinha wrote:
> > >
> > >
> > > > On Apr 17, 2020, at 8:57 PM, Michael S. Tsirkin <address@hidden> wrote:
> > > >
> > > > Is there a real reason to do this? Can't we just limit the
> > > > hotplug control to pcie ports? At some point I'd like us to
> > > > start leaving piix alone..
> > >
> > > Yes we really need this feature as want to be able to hot plug devices
> > > into the guest but prevent customers from hot unplugging them from say
> > > Windows system tray.
> > >
> > > ani
> >
> > Problem is, I think this is not something we can support with pcie or shpc.
> > I'm reluctant to add features that only ACPI can support,
> > we are trying to phase that out.
>
> >From the upstream POV, there's been no decision / agreement to phase
> out PIIX,
Phase out now. But I for one would like to focus on keeping PIIX stable
and focus development on q35. Not bloating PIIX with lots of new
features is IMHO a good way to do that.
> this is purely a RHEL downstream decision & plan. If other
> distros / users have a different POV, and find the feature useful, we
> should accept the patch if it meets the normal QEMU patch requirements.
>
> Regards,
> Daniel
Orthogonality of features is important. It is tough to navigate our
feature matrix as it is. Figuring things out if random features
depend on other random features becomes impossible.
> --
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> |: https://libvirt.org -o- https://fstop138.berrange.com :|
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- Re: [PATCH] Add a new PIIX option to control PCI hot unplugging of devices on non-root buses, (continued)
- Re: [PATCH] Add a new PIIX option to control PCI hot unplugging of devices on non-root buses, Laine Stump, 2020/04/17
- Re: [PATCH] Add a new PIIX option to control PCI hot unplugging of devices on non-root buses, Ani Sinha, 2020/04/17
- Re: [PATCH] Add a new PIIX option to control PCI hot unplugging of devices on non-root buses, Marcel Apfelbaum, 2020/04/18
- Re: [PATCH] Add a new PIIX option to control PCI hot unplugging of devices on non-root buses, Ani Sinha, 2020/04/19
- Re: [PATCH] Add a new PIIX option to control PCI hot unplugging of devices on non-root buses, Ani Sinha, 2020/04/20
- Re: [PATCH] Add a new PIIX option to control PCI hot unplugging of devices on non-root buses, Ani Sinha, 2020/04/20
- Re: [PATCH] Add a new PIIX option to control PCI hot unplugging of devices on non-root buses, Julia Suvorova, 2020/04/20
- Re: [PATCH] Add a new PIIX option to control PCI hot unplugging of devices on non-root buses, Daniel P . Berrangé, 2020/04/20
- Re: [PATCH] Add a new PIIX option to control PCI hot unplugging of devices on non-root buses, Ani Sinha, 2020/04/20
- Re: [PATCH] Add a new PIIX option to control PCI hot unplugging of devices on non-root buses, Philippe Mathieu-Daudé, 2020/04/20
- Re: [PATCH] Add a new PIIX option to control PCI hot unplugging of devices on non-root buses,
Michael S. Tsirkin <=
- Re: [PATCH] Add a new PIIX option to control PCI hot unplugging of devices on non-root buses, Ani Sinha, 2020/04/21
- Re: [PATCH] Add a new PIIX option to control PCI hot unplugging of devices on non-root buses, Daniel P . Berrangé, 2020/04/21
- Re: [PATCH] Add a new PIIX option to control PCI hot unplugging of devices on non-root buses, Ani Sinha, 2020/04/22
- Re: [PATCH] Add a new PIIX option to control PCI hot unplugging of devices on non-root buses, Ani Sinha, 2020/04/24
- Re: [PATCH] Add a new PIIX option to control PCI hot unplugging of devices on non-root buses, Eduardo Habkost, 2020/04/24
- Re: [PATCH] Add a new PIIX option to control PCI hot unplugging of devices on non-root buses, Ani Sinha, 2020/04/27
- Re: [PATCH] Add a new PIIX option to control PCI hot unplugging of devices on non-root buses, Igor Mammedov, 2020/04/29