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Diffstat (limited to 'results/classifier/108/other/1502934')
| -rw-r--r-- | results/classifier/108/other/1502934 | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/results/classifier/108/other/1502934 b/results/classifier/108/other/1502934 new file mode 100644 index 000000000..3fd351e5b --- /dev/null +++ b/results/classifier/108/other/1502934 @@ -0,0 +1,44 @@ +KVM: 0.913 +device: 0.782 +debug: 0.782 +other: 0.770 +graphic: 0.743 +semantic: 0.716 +permissions: 0.659 +performance: 0.621 +boot: 0.529 +PID: 0.452 +network: 0.378 +vnc: 0.371 +files: 0.357 +socket: 0.307 + +QEMU does not start when kvm enabled (SMM issue?) + +Hi! + +QEMU stopped working after "[355023f2010c4df619d88a0dd7012b4b9c74c12c] pc: add SMM property" on my server. It says "Guest has not initialized the display (yet)." and nothing happens. But only if I use -enable-kvm. + +However, the problem gone after I hardcoded pc_machine_is_smm_enabled() to always return false (but I have little to no understanding of what SMM really is). + +CMD line that reproduces the issue: qemu-system-x86_64 -enable-kvm -display curses . It doesn't work the server, but works perfectly on my laptop :(. + +I'm using Arch Linux with all updates. +Some info: +Linux machine 4.2.2-1-ARCH #1 SMP PREEMPT Tue Sep 29 22:21:33 CEST 2015 x86_64 GNU/Linux +Qemu-2.4.0 (tried HEAD as well) +CPU: Intel(R) Core(TM) i7 CPU 950 @ 3.07GHz +Some messages from dmesg, just in case: +[ 6.996297] kvm: VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL does not work properly. Using workaround +[ 6381.722990] kvm: zapping shadow pages for mmio generation wraparound + + +I'm more than happy to provide additional information if needed. + +Cheers, +Alex + +This is a KVM bug, not a QEMU bug. It only happens with ept=1 and unrestricted_guest=0. A workaround is to disable SMM in QEMU (-machine smm=off) or to set kvm_intel's ept parameter to 0. + +I'm closing the bug here because it is the wrong tracker (also I know about it, can reproduce, and hope to provide a fix later this week). + |