the first bad commit is: commit ec6f25e788ef57ce1e9f734984ef8885172fd9e2 Merge: 007c99f 9ef1473 Author: Peter Maydell <peter.mayd...@linaro.org> Date: Tue Feb 3 21:37:16 2015 +0000
Merge remote-tracking branch 'remotes/rth/tags/pull-tg-s390-20150203' into staging s390 translator bug fixes # gpg: Signature made Tue 03 Feb 2015 20:39:15 GMT using RSA key ID 4DD0279B # gpg: Good signature from "Richard Henderson <rth7...@gmail.com>" # gpg: aka "Richard Henderson <r...@redhat.com>" # gpg: aka "Richard Henderson <r...@twiddle.net>" * remotes/rth/tags/pull-tg-s390-20150203: target-s390x: fix and optimize slb* and slbg* computation of carry/borrow flag target-s390x: support OC and NC in the EX instruction disas/s390.c: Remove unused variables target-s390x: Mark check_privileged() as !CONFIG_USER_ONLY target-s390: Implement ECAG target-s390: Implement LURA, LURAG, STURG target-s390: Fix STURA target-s390: Fix STIDP target-s390: Implement EPSW target-s390: Implement SAM specification exception Signed-off-by: Peter Maydell <peter.mayd...@linaro.org> -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1422285 Title: The guest will be destroyed when hot plug the VF to guest for the second time. Status in QEMU: New Bug description: Environment: ------------ Host OS (ia32/ia32e/IA64):ia32e Guest OS (ia32/ia32e/IA64):ia32e Guest OS Type (Linux/Windows):linux kvm.git Commit: 6557bada461afeaa920a189fae2cff7c8fdce39f qemu.kvm Commit: cd2d5541271f1934345d8ca42f5fafff1744eee7 Host Kernel Version:3.19.0-rc3 Hardware:Haswell_EP,Ivytown_EP Bug detailed description: -------------------------- create guest , then hot plug the VF to the guest for the second time, the guest will be destroyed. note: 1. hot plug the device to guest with vfio, the guest works fine 2.this should be a qemu bug: kvm + qemu = result 6557bada + cd2d5541 = bad 6557bada + a805ca54 = good Reproduce steps: ---------------- 1. qemu-system-x86_64 -enable-kvm -m 2G -net none -monitor pty rhel6u5.qcow 2. echo "device_add pci-assign,host=03:10.1,id=nic" >/dev/pts/2 3. cat /dev/pts/2 & 4. echo "device_del nic" >/dev/pts/2 5. echo "device_add pci-assign,host=03:10.0,id=nic" >/dev/pts/2 Current result: ---------------- guest will be destroyed when hot plug the vf to guest for the second time. Expected result: ---------------- guest works fine when hot plug the vf to guest for the second time Basic root-causing log: ---------------------- [root@vt-hsw2 cathy]# qemu-system-x86_64 -enable-kvm -m 2G -net none -monitor pty rhel6u5.qcow char device redirected to /dev/pts/2 (label compat_monitor0) Segmentation fault (core dumped) some dmesg log: pci-stub 0000:03:10.1: kvm deassign device pci-stub 0000:03:10.1: enabling device (0000 -> 0002) qemu-system-x86[9894]: segfault at 0 ip (null) sp 00007fa73df0cae8 error 14 pci-stub 0000:03:10.1: kvm assign device To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1422285/+subscriptions