我正试图在Gem5中运行我的第一个全系统模拟，但我得到了以下错误
[ 5.703750] VFS: Cannot open root device "sda1" or unknown-block(8,1): error -6
[ 5.704398] Please append a correct "root=" boot option; here are the available partitions:
[ 5.706209] 0800 252 sda
[ 5.706370] driver: sd
[ 5.707223] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(8,1)
[ 5.708000] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.18.0+ #1
[ 5.708570] Hardware name: V2P-CA15 (DT)
[ 5.709020] Call trace:
[ 5.709601] dump_backtrace+0x0/0x1c0
[ 5.710230] show_stack+0x14/0x20
[ 5.710844] dump_stack+0x8c/0xac
[ 5.711375] panic+0x130/0x288
[ 5.711980] mount_block_root+0x1a8/0x294
[ 5.712617] mount_root+0x140/0x174
[ 5.713243] prepare_namespace+0x138/0x180
[ 5.713891] kernel_init_freeable+0x1c0/0x1e0
[ 5.714489] kernel_init+0x10/0x108
[ 5.715069] ret_from_fork+0x10/0x18
[ 5.715584] Kernel Offset: disabled
[ 5.716051] CPU features: 0x21c0649a
[ 5.716509] Memory Limit: 512 MB
[ 5.717254] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(8,1) ]---
gem5命令的输出是
warn: Tried to write RVIO at offset 0xa8 (data 0) that doesn't exist
warn: Tried to read RealView I/O at offset 0x8 that doesn't exist
warn: Tried to read RealView I/O at offset 0x48 that doesn't exist
warn: EnergyCtrl: Disabled handler, ignoring read from reg 0
info: Dumping kernel dmesg buffer to system.workload.dmesg...
warn: Kernel panic in simulated kernel
我正在使用
- Gem5 20.1.0.2(稳定分支(
- cmd:
./build/ARM/gem5.opt configs/example/fs.py --cpu-type=TimingSimpleCPU --cpu-clock=1GHz --kernel=binaries/vmlinux.arm64 --disk-image=disks/m5_exit.squashfs.arm64 --bootloader=binaries/boot.arm64
内核和磁盘映像取自gem5来宾二进制页面，我获取了第一个链接(最新的Linux内核映像/Bootloader(
我注意到这个问题，但错误略有不同，运行的命令行、内核和映像也有所不同。
我该如何解决这个问题？
您提到的问题的答案指向：https://askubuntu.com/questions/41930/kernel-panic-not-syncing-vfs-unable-to-mount-root-fs-on-unknown-block0-0/1048477#1048477其中包含该错误的详细诊断程序。
为此，从内核消息中，我们可以清楚地看到root=内核CLI参数不正确：使用了默认的sda1而不是所需的sda。
在fs.py上，可以使用设置正确的root=
--command-line 'earlyprintk=pl011,0x1c090000 lpj=19988480 rw loglevel=8 mem=256MB root=/dev/sda console_msg_format=syslog nokaslr norandmaps panic=-1 printk.devkmsg=on printk.time=y rw console=ttyAMA0 - lkmc_home=/lkmc'
我认为没有办法在fs.py中只设置root=，所以所有其他选项都是从默认的fs.py内核CLI中复制的，只修改了--root。这也可以在这里看到。