virsh -c qemu:///system start vm_name1

vmwrite error: reg 401e value a04b0080 (err 12)
Pid: 3526, comm: qemu-kvm Not tainted 2.6.32-358.6.2.el6.x86_64 #1
Call Trace:
[<ffffffffa04a797c>] ? vmwrite_error+0x2c/0x30 [kvm_intel]
[<ffffffffa04a79a0>] ? vmcs_writel+0x20/0x30 [kvm_intel]
[<ffffffffa04aa4d3>] ? vmx_cpuid_update+0x53/0xf0 [kvm_intel]
[<ffffffffa04576c9>] ? kvm_arch_vcpu_ioctl+0xc59/0x1080 [kvm]
[<ffffffffa0443dd8>] ? kvm_vcpu_ioctl+0x218/0x580 [kvm]
[<ffffffff8104757c>] ? __do_page_fault+0x1ec/0x480
[<ffffffffa0446620>] ? kvm_dev_ioctl+0x50/0x4b0 [kvm]
[<ffffffff81194fb2>] ? vfs_ioctl+0x22/0xa0
[<ffffffff8119547a>] ? do_vfs_ioctl+0x3aa/0x580
[<ffffffff811956d1>] ? sys_ioctl+0x81/0xa0
[<ffffffff8100b072>] ? system_call_fastpath+0x16/0x1b