On Wed, 13 Feb 2019 15:40:57 +0800 "Liu, Jing2" <jing2....@linux.intel.com> wrote:
> Hi Igor, > > Thanks for your reply! > > On 2/5/2019 11:47 PM, Igor Mammedov wrote: > > 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. > > > Is there any key config of kernel in guest, besides those I listed above? Maybe Marcel knows something about it (CCed) > > I used guest kernel v4.18 and qemu upstream v3.1.0 > Command line: > sudo /home/xxx/qemu/x86_64-softmmu/qemu-system-x86_64 \ > -machine pc,accel=kvm,kernel_irqchip -cpu host -m 1G,slots=2,maxmem=10G \ > -nographic -no-user-config -nodefaults -vga none \ > -drive file=/home/xxx/image/clear-24690-kvm.img,if=virtio,format=raw \ > -smp sockets=1,cpus=4,cores=2,maxcpus=8 \ > -device virtio-serial-pci,id=virtio-serial0,disable-modern,addr=0x5 \ > -monitor tcp:0.0.0.0:5000,nowait,server \ > -chardev stdio,id=charconsole0 -device > virtconsole,chardev=charconsole0,id=console0 \ > -kernel /home/xxx/linux-stable/arch/x86/boot/bzImage \ > -append 'root=/dev/vda3 rw rootfstype=ext4 data=ordered > rcupdate.rcu_expedited=1 pci=lastbus=0 pci=realloc=on tsc=reliable > no_timer_check reboot=t noapictimer console=hvc0 iommu=off panic=1 > initcall_debug acpi.debug_layer=0x40000 acpi.debug_level=4 ' \ > -device pci-bridge,bus=pci.0,id=br1,chassis_nr=1,shpc=on,addr=6 \ > > >> > >> 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 > > > I'll try it! > > Thanks! > Jing > > >
