On Wed, 30 Jan 2019 21:02:10 +0800 "Liu, Jing2" <jing2....@linux.intel.com> 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 >
