Re: [PATCH v2] pcie_root_port: Add enable_hotplug option

[Laine Stump <laine@redhat.com>]

On 2/19/20 9:55 AM, Julia Suvorova wrote:
> Make hot-plug/hot-unplug on PCIe Root Ports optional to allow libvirt
> manage it and restrict unplug for the whole machine. This is going to
> prevent user-initiated unplug in guests (Windows mostly).
> Hotplug is enabled by default.
> Usage:
>      -device pcie-root-port,enable-hotplug=false,...
> 
> If you want to disable hot-unplug on some downstream ports of one
> switch, disable hot-unplug on PCIe Root Port connected to the upstream
> port as well as on the selected downstream ports.
> 
> Discussion related:
>      https://lists.gnu.org/archive/html/qemu-devel/2020-02/msg00530.html
> 
> Signed-off-by: Julia Suvorova <jusual@redhat.com>
> ---
> v1: https://lists.gnu.org/archive/html/qemu-devel/2020-02/msg04868.html
> 
> v2:
>      * change name of the option to 'enable-hotplug' [Laine]


Heh... I didn't actually expect you to do that just for me :-) 
(especially since I guess nobody else was bothered by "disable"). But 
now that you did, I look at it and realize that the "enable-" part is 
redundant, ie. just "hotplug=on|off|true|false" is plenty descriptive 
(since it's implied that it's being enabled).

But I've already created too much of a tempest over such a tiny detail, 
and kind of wish I'd just kept quiet instead...

I'll try to test this with libvirt in the next day or two.


>      * change order of enabling capability bits [Igor]
>      * enable HPS bit [Igor]
>      * add option to xio3130_downstream [Ján]
>