Zachery Salwasser wrote: > I have been having trouble with reading the extended registers > normally read by kvm_get_sregs() on host kernels ~2.6.32 and higher. > > I am currently running Linux 2.6.32-8, kvm-kmod 2.6.32.8, and qemu 0.12.2. > > I get the following output when I try info registers on the qemu console: > > (qemu) info registers > EAX=6d63c93d EBX=ffdffc70 ECX=ffdffc70 EDX=00000000 > ESI=ffdffc50 EDI=823e7b68 EBP=80550f50 ESP=80550f34 > EIP=f8621d3e EFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 > ES =3d65 00001000 b772bdf8 3fffe800 DPL=3 Reserved > CS =4fe1 b7d59ff4 b7d5b3a0 6b300100 > SS =0000 b772bde8 0847ab38 6f300a00 > DS =b3d0 b7d5b3cc 00000000 7bffd500 DPL=2 DS [E-A] > FS =e008 b7d5b3a0 b7d59ff4 005bb900 DPL=1 CS32 [--A] > GS =ffff ffffffff 00000007 7fffff00 DPL=3 CS64 [CRA] > LDT=9ff4 b772bde0 00000008 7ffff500 DPL=3 DS [E-A] > TR =0000 00000080 b7fb63ab 00f00000 > GDT= 00014fe1 00000100 > IDT= b7d5b3cc 0000b3d0 > CR0=08000101 CR2=00002000 CR3=00000000 CR4=08000101 > DR0=00000000 DR1=00000000 DR2=00000000 DR3=00000000 > DR6=ffff0ff0 DR7=00000000 > FCW=027f FSW=0000 [ST=0] FTW=00 MXCSR=00000000 > FPR0=0000000000000000 ffff FPR1=00ff00ff00ff00ff ffff > FPR2=0000000000000000 ffff FPR3=00fe000d009900ee ffff > FPR4=ff0d9aefff6a604c ffff FPR5=00ff000d009a00ef ffff > FPR6=0000000000000000 ffff FPR7=0080008000800080 ffff > XMM00= > 00000020000000000000000000000001 XMM01=81181ab88055f980e115d00000000020 > XMM02=f79092a481181ab8c03845740dd1d000 XMM03=81181ab8c03845740000016d804e93e0 > XMM04=c0384574000000000000000100000000 XMM05=e1150000804e7e36f790931400000000 > XMM06=806f02980000000000000000c0384574 XMM07=000000028055f62000000080c0384574 > > Note that cr3 is 0, which doesn't seem possible. The contents of the > sregs is also static across invocations of info registers (whereas the > "regs" chang), indicating that the values that are there are garbage. > > Delving deeper, when I check actual invocations of kvm_get_sregs(), it > usually returns either 0 or -22, neither value indicating success. -22 indicates something bad is happening. Maybe sizeof(struct kvm_sregs) is different from kernel and user space POV on your host. That would cause KVM_GET_SREGS to have different values, thus the kernel would be unable to dispatch the request. Could you check this? Jan
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