Hi Ani,
On 4/18/20 6:25 AM, Ani Sinha wrote:
+Julia who implemented https://patchwork.kernel.org/patch/11388881/
On Apr 18, 2020, at 3:26 AM, Laine Stump <la...@redhat.com> wrote:
On 4/17/20 12:35 PM, Ani Sinha wrote:
+Laine
On Apr 17, 2020, at 9:39 PM, Michael S. Tsirkin <m...@redhat.com> wrote:
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.
Hmm. I see. We use conventional PCI and hence was looking for providing this
feature for conventional PCI only. Laine might be able to throw some lights as
to feasibility of the in PCIE world.
Sorry, my knowledge doesn't go that low. If there's a qemu option I can expose
it in libvirt, but am by no means an expert of qemu internals or the pci/pcie
specs :-)
(BTW, I think in the past people have prevented enabling hot-unplug by unprivileged users
in Windows with some sort of a "system policy" in Windows. (whatever that is -
I don't use Windows, and have just heard this from others when discussing the problem).
A PCIe Root Port or a PCI slot can or cannot support hot-plugging.
Anything in the middle can't be done at PCIe/PCI level (as far as I know).
I think the answer can be at the modelling level. Use non hot-pluggable
slots (or PCIe Root Ports without hot-plug support) for the devices
you don't want hot-unplugged, leave an empty PCI Bridge (or some PCIe
Root Ports with hot-plug support) to be able to hot-plug devices.
Thanks,
Marcel
My question to Julia is whether it is possible to disable just hot unplug but
keep hot plugging for PCIE devices enabled using PCI_EXP_SLTCAP_HPC or
otherwise in Qemu?
