Virtual machine Qemu系统mips卡在“之后”；控制台[tty0]已启用“；

我试图使用jcowgill的预编译内核和QCOW2磁盘映像，但qemu在一些输出后被困在这里。不知道发生了什么，qemu只是卡在这里，我无法输入任何命令

命令：

qemu-system-mips64el \
-M malta \
-cpu MIPS64R2-generic \
-m 2G \
-append 'root=/dev/sda2 console=tty0 mem=2048m nokaslr' \
-nographic \
-kernel vmlinux-4.9.0-4-5kc-malta.mipsel.stretch \
-initrd initrd.img-4.9.0-4-5kc-malta.mipsel.stretch \
-drive file=debian-stretch-mipsel.qcow2 

输出：

[    0.000000] Linux version 4.9.0-4-5kc-malta (debian-kernel@lists.debian.org) (gcc version 6.3.0 20170516 (Debian 6.3.0-18) ) #1 Debian 4.9.65-3 (2017-12-03)
[    0.000000] earlycon: uart8250 at I/O port 0x3f8 (options '38400n8')
[    0.000000] bootconsole [uart8250] enabled
[    0.000000] CPU0 revision is: 00010000 (MIPS GENERIC QEMU)
[    0.000000] FPU revision is: 007f0000
[    0.000000] Checking for the multiply/shift bug... [    0.000000] no.
[    0.000000] Checking for the daddiu bug... [    0.000000] no.
[    0.000000] MIPS: machine is mti,malta
[    0.000000] Software DMA cache coherency enabled
[    0.000000] Determined physical RAM map:
[    0.000000]  memory: 0000000010000000 @ 0000000000000000 (usable)
[    0.000000]  memory: 0000000070000000 @ 0000000090000000 (usable)
[    0.000000] User-defined physical RAM map:
[    0.000000]  memory: 0000000080000000 @ 0000000000000000 (usable)
[    0.000000] Initial ramdisk at: 0x900000000ed70000 (19204358 bytes)
[    0.000000] Reserving 0MB of memory at 0MB for crashkernel
[    0.000000] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
[    0.000000] Primary data cache 32kB, 4-way, VIPT, cache aliases, linesize 32 bytes
[    0.000000] Zone ranges:
[    0.000000]   DMA      [mem 0x0000000000000000-0x0000000000ffffff]
[    0.000000]   DMA32    [mem 0x0000000001000000-0x00000000ffffffff]
[    0.000000]   Normal   empty
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x0000000000000000-0x000000007fffffff]
[    0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x000000007fffffff]
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 516096
[    0.000000] Kernel command line: rd_start=0xffffffff8ed70000 rd_size=19204358 root=/dev/sda2 console=tty0 mem=2048m nokaslr
[    0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
[    0.000000] Dentry cache hash table entries: 262144 (order: 9, 2097152 bytes)
[    0.000000] Inode-cache hash table entries: 131072 (order: 8, 1048576 bytes)
[    0.000000] Writing ErrCtl register=00000000
[    0.000000] Readback ErrCtl register=00000000
[    0.000000] Memory: 2030840K/2097152K available (6118K kernel code, 982K rwdata, 1596K rodata, 1516K init, 360K bss, 66312K reserved, 0K cma-reserved)
[    0.000000] NR_IRQS:256
[    0.000000] CPU frequency 200.00 MHz
[    0.000000] clocksource: MIPS: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112681107 ns
[    0.000108] sched_clock: 32 bits at 99MHz, resolution 10ns, wraps every 21474922490ns
[    0.004826] Console: colour dummy device 80x25
[    0.005174] console [tty0] enabled
[    0.005521] bootconsole [uart8250] disabled

内核和img文件从

---

内核命令行显示“console=tty0”，这意味着“请将控制台发送到第一个虚拟终端”，即图形设备。但是您正在运行的机器中没有图形设备（您在QEMU命令行上说“-nographic”，内核说“Console:color-dummy-device 80x25”）。因此，您会通过“uart8250”earlycon（即串行端口）看到初始启动消息，但一旦内核达到可以满足您的命令行请求的程度，它就会启用tty0（无处可去）并禁用uart8250（因此您看不到进一步的输出）

您需要告诉内核将控制台输出发送到串行端口，如果您希望看到它出现在串行端口上，那么对于马耳他板，我认为您可以使用“console=ttyS0”代替。或者，您可以删除'-nographic'，确保您的内核内置了VGA卡的驱动程序，并保留“console=tty0”，您将在图形窗口的虚拟控制台上看到控制台

如果你看一下，你会发现它确实建议使用“console=ttyS0”

vmlinux-4.9.0-4-5kc-malta.mipsel.stretch 
initrd.img-4.9.0-4-5kc-malta.mipsel.stretch 
debian-stretch-mipsel.qcow2