Bug 1619885
| Summary: | [Q35] Guest reboot immediately after hotplug pcie-pci-bridge into pcie-root-port that without "bus-reserver=1" | ||||||
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| Product: | Red Hat Enterprise Linux 7 | Reporter: | jingzhao <jinzhao> | ||||
| Component: | qemu-kvm-rhev | Assignee: | Amnon Ilan <ailan> | ||||
| Status: | CLOSED WONTFIX | QA Contact: | jingzhao <jinzhao> | ||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | medium | ||||||
| Version: | 7.6 | CC: | chayang, ehabkost, juzhang, knoel, laine, michen, virt-maint | ||||
| Target Milestone: | rc | ||||||
| Target Release: | --- | ||||||
| Hardware: | Unspecified | ||||||
| OS: | Unspecified | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2018-09-01 21:37:14 UTC | Type: | Bug | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Attachments: |
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As discussed in Bug 1390329, hotplug of a pcie-pci-bridge is not supported in RHEL, and isn't possible via libvirt, which is the only supported method of controlling qemu. Therefore, the events you describe in this BZ cannot possible occur on a supported RHEL system. I think this means that the BZ should be closed, but I'll leave that up to the qemu people. |
Created attachment 1477781 [details] dmesg log of guest after hotplug Description of problem: Guest reboot immediately after hotplug pcie-pci-bridge into pcie-root-port that without "bus-reserver=1" and then also guest can found pcie-pci-bridge Version-Release number of selected component (if applicable): qemu-kvm-rhev-2.12.0-11.el7.x86_64 kernel-3.10.0-933.el7.x86_64 How reproducible: 3/3 Steps to Reproduce: 1.Boot guest with qemu command line [1] 2.Plug pcie-pci-bridge into pcie-root-port (qemu) device_add pcie-pci-bridge,id=bridge3,bus=pci.8 3.check pcie-pci-bridge through "info qtree" (qemu) info qtree bus: main-system-bus type System dev: kvm-ioapic, id "" gpio-in "" 24 gsi_base = 0 (0x0) mmio 00000000fec00000/0000000000001000 dev: q35-pcihost, id "" MCFG = 2952790016 (0xb0000000) pci-hole64-size = 34359738368 (32 GiB) short_root_bus = 0 (0x0) below-4g-mem-size = 2147483648 (2 GiB) above-4g-mem-size = 2147483648 (2 GiB) x-pci-hole64-fix = true bus: pcie.0 type PCIE dev: pcie-root-port, id "pci.8" x-migrate-msix = true bus-reserve = 4294967295 (0xffffffff) io-reserve = 18446744073709551615 (16 EiB) mem-reserve = 18446744073709551615 (16 EiB) pref32-reserve = 18446744073709551615 (16 EiB) pref64-reserve = 18446744073709551615 (16 EiB) power_controller_present = true chassis = 8 (0x8) slot = 0 (0x0) port = 23 (0x17) aer_log_max = 8 (0x8) addr = 09.0 romfile = "" rombar = 1 (0x1) multifunction = false command_serr_enable = true x-pcie-lnksta-dllla = true x-pcie-extcap-init = true class PCI bridge, addr 00:09.0, pci id 1b36:000c (sub 0000:0000) bar 0: mem at 0xfce17000 [0xfce17fff] bus: pci.8 type PCIE dev: pcie-pci-bridge, id "bridge3" msi = "auto" addr = 00.0 romfile = "" rombar = 1 (0x1) multifunction = false command_serr_enable = true x-pcie-lnksta-dllla = true x-pcie-extcap-init = true class PCI bridge, addr 09:00.0, pci id 1b36:000e (sub 0000:0000) bar 0: mem at 0xfc400000 [0xfc4000ff] bus: bridge3 type PCI 4. Check pcie-pci-bridge in the guest # lspci -vvv -t -[0000:00]-+-00.0 Intel Corporation 82G33/G31/P35/P31 Express DRAM Controller +-01.0 Red Hat, Inc. QXL paravirtual graphic card +-03.0-[01]----00.0 Red Hat, Inc. Virtio block device +-03.1-[02]----00.0 Red Hat, Inc. Virtio network device +-03.2-[03-04]----00.0-[04]-- +-03.3-[05-06]-- +-07.0-[07-08]----00.0-[08]----01.0 Realtek Semiconductor Co., Ltd. RTL-8100/8101L/8139 PCI Fast Ethernet Adapter +-09.0-[09-0a]----00.0-[0a]-- +-1d.0 Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 +-1d.1 Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 +-1d.2 Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 +-1d.7 Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 +-1f.0 Intel Corporation 82801IB (ICH9) LPC Interface Controller +-1f.2 Intel Corporation 82801IR/IO/IH (ICH9R/DO/DH) 6 port SATA Controller [AHCI mode] \-1f.3 Intel Corporation 82801I (ICH9 Family) SMBus Controller Actual results: guest reboot immediately after hotplug pcie-pci-bridge Expected results: Guest didn't reboot Additional info: [1] /usr/libexec/qemu-kvm \ -M q35 \ -cpu SandyBridge \ -nodefaults -rtc base=utc \ -m 4G \ -smp 4,sockets=4,cores=1,threads=1 \ -enable-kvm \ -uuid 990ea161-6b67-47b2-b803-19fb01d30d12 \ -k en-us \ -nodefaults \ -boot menu=on \ -qmp tcp:0:6667,server,nowait \ -usb \ -device usb-tablet \ -vga qxl \ -device pcie-root-port,port=0x10,chassis=1,id=pci.1,bus=pcie.0,multifunction=on,addr=0x3 \ -device pcie-root-port,port=0x11,chassis=2,id=pci.2,bus=pcie.0,addr=0x3.0x1 \ -device pcie-root-port,port=0x12,chassis=3,id=pci.3,bus=pcie.0,addr=0x3.0x2 \ -device pcie-root-port,port=0x13,chassis=4,id=pci.4,bus=pcie.0,addr=0x3.0x3,bus-reserve=1 \ -drive file=/home/env/rhel76-64-virtio-scsi.qcow2,if=none,id=drive-virtio-disk0,format=qcow2,cache=none,werror=stop,rerror=stop \ -device virtio-blk-pci,drive=drive-virtio-disk0,id=virtio-disk0,bus=pci.1,bootindex=0 \ -device virtio-net-pci,netdev=tap10,mac=00:52:68:26:31:03,id=net0,bus=pci.2 -netdev tap,id=tap10 \ -device pcie-pci-bridge,id=bridge1,bus=pci.3 \ -device pcie-root-port,port=0x16,chassis=7,id=pci.7,bus=pcie.0,addr=0x7 \ -device pcie-pci-bridge,id=bridge2,bus=pci.7 \ -device rtl8139,netdev=tap11,mac=00:52:68:26:31:04,id=net1,bus=bridge2,addr=0x1 -netdev tap,id=tap11 \ -device pcie-root-port,port=0x17,chassis=8,id=pci.8,bus=pcie.0,addr=0x9 \ -monitor stdio \ -vnc :1 \