qemu-kvm segfaulting when running kernel-PAE.i686

Adam Hough adam at gradientzero.com
Thu Jun 12 14:41:31 UTC 2008


Does anyone know of a reason that would cause qemu-kvm to segfault when the
system is running the an PAE kernel?  Qemu-kvm works fine if I am using the
kernel.i686 package.

When it does crash under the PAE kernel it leaves this message in dmesg:

kvm: 3646: cpu0 unhandled rdmsr: 0xc0000080
kvm: inject_page_fault: double fault 0x804d6ffc
kvm: 3646: cpu0 task_switch_interception: task switch is unsupported

Selinux is currently set to permissive so I know it is not selinux's fault.

I am currently running the 2.6.25.4-30.fc9.i686.PAE kernel.

root at tinybox winxp_qemu # qemu-kvm winxp_qemu.img
unhandled vm exit: 0x3f60101 vcpu_id 0
rax 000000002446ff20 rbx 000000008054269c rcx 0000000000000000 rdx
0000000000008052
rsi 00000000805426c8 rdi 0000000000000000 rsp 00000000804d7000 rbp
000000008052d44d
r8  0000000000000000 r9  0000000000000000 r10 0000000000000000 r11
0000000000000000
r12 0000000000000000 r13 0000000000000000 r14 0000000000000000 r15
0000000000000000
rip 0000000080540470 rflags 00000086
cs 0008 (00000000/ffffffff p 1 dpl 0 db 1 s 1 type b l 0 g 0 avl 0)
ds 0023 (00000000/ffffffff p 1 dpl 3 db 1 s 1 type 3 l 0 g 1 avl 0)
es 0023 (00000000/ffffffff p 1 dpl 3 db 1 s 1 type 3 l 0 g 1 avl 0)
ss 0010 (00000000/ffffffff p 1 dpl 0 db 1 s 1 type 3 l 0 g 1 avl 0)
fs 0030 (ffdff000/00001fff p 1 dpl 0 db 1 s 1 type 3 l 0 g 1 avl 0)
gs 0000 (00000000/0000ffff p 1 dpl 0 db 0 s 1 type 3 l 0 g 0 avl 0)
tr 0028 (80042000/000020ab p 1 dpl 0 db 0 s 0 type 9 l 0 g 0 avl 0)
ldt 0000 (00000000/0000ffff p 0 dpl 0 db 0 s 0 type 0 l 0 g 0 avl 0)
gdt 8003f000/3ff
idt 8003f400/7ff
cr0 8001003d cr2 804d6ffc cr3 abc000 cr4 20 cr8 0 efer 0
Aborted


My cpu is a AMD Athlon(tm) X2 Dual Core Processor BE-2400
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm
3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm extapic cr8_legacy
3dnowprefetch ts fid vid ttp tm stc 100mhzsteps
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