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Re: [Qemu-devel] [Issues] PCI hotplug does not work well on pc platform?
From: |
Igor Mammedov |
Subject: |
Re: [Qemu-devel] [Issues] PCI hotplug does not work well on pc platform? |
Date: |
Tue, 5 Feb 2019 16:47:16 +0100 |
On Wed, 30 Jan 2019 21:02:10 +0800
"Liu, Jing2" <address@hidden> wrote:
> Hi everyone,
>
> I have two questions.
> 1. PCI hotplug on pci.0 must manually rescan in guest. The ACPI hotplug
> handler sends the GPE event to guest but it seems guest doesn't receive
> it? I tried to open ACPI debug level/layer to 0xffffffff, in order to
> see if there is any message after device_add in monitor, but no message
> comes out until I manually rescan. Also tried printk in
> acpi_ev_gpe_xrupt_handler() and acpi_ev_sci_xrupt_handler(). No output
> in dmesg.
> (I'm sure that CONFIG_HOTPLUG_PCI_PCIE=y, CONFIG_HOTPLUG_PCI_CPCI=y,
> CONFIG_HOTPLUG_PCI=y, CONFIG_HOTPLUG_PCI_ACPI=y)
>
> Whether this is a kind of design or a known issue? Does guest receive
> the request, where can I find the
does it work with known to work kernels (RHEL7)?
Also sharing used QEMU version and command line could help.
>
> 2. I want to try hotplugging on pci-bridge on pc platform, using shpc. I
> set shpc=on, but when I do device_add, qemu still calls
> acpi_pcihp_device_plug_cb? Why it does not call pci_bridge_dev_hotplug_cb?
> (CONFIG_HOTPLUG_PCI_SHPC=y)
try to disable ACPI hotplug for bridges
-global PIIX4_PM.acpi-pci-hotplug-with-bridge-support=off
> Thanks very much!
> Jing
>
- Re: [Qemu-devel] [Issues] PCI hotplug does not work well on pc platform?,
Igor Mammedov <=