panic: C2 enter is not set
cpuid = 0
Trace beginning at frame 0xffffffff817adb80
acpi_cst_cx_probe_cst() at acpi_cst_cx_probe_cst+0x4d1 0xffffffff80a06de1 
acpi_cst_cx_probe_cst() at acpi_cst_cx_probe_cst+0x4d1 0xffffffff80a06de1 
acpi_cst_attach() at acpi_cst_attach+0x18b 0xffffffff80a07c9b 
device_doattach() at device_doattach+0x3af 0xffffffff8068dbef 
bus_generic_attach() at bus_generic_attach+0x1a 0xffffffff8068f7ea 
acpi_cpu_attach() at acpi_cpu_attach+0x3e7 0xffffffff80a05bb7 
Debugger("panic")

CPU0 stopping CPUs: 0x0000003e
 stopped
Stopped at      Debugger+0x7c:  movb    $0,0xbdaf09(%rip)
db> 
cpu_cst: global Cx count 1
C2: BitWidth(vendor) 8, BitOffset(class) 0, Address(arg0) 0x0, AccessWidth(arg1) 0x0
panic: C1 startup setup failed: 22
cpuid = 0
Trace beginning at frame 0xfffff8008dd239e0
acpi_cst_postattach() at acpi_cst_postattach+0x761 0xffffffff80a077d1 
acpi_cst_postattach() at acpi_cst_postattach+0x761 0xffffffff80a077d1 
acpi_task_thread() at acpi_task_thread+0x6a 0xffffffff80a1666a 
Debugger("panic")

CPU0 stopping CPUs: 0x0000003e