01 qemu 启动编译好的镜像 VFS: Unable to mount root fs on unknown-block(0,0)
Posted 蓝风9
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了01 qemu 启动编译好的镜像 VFS: Unable to mount root fs on unknown-block(0,0)相关的知识，希望对你有一定的参考价值。
前言
不太理解的问题帖, 直接贴相关信息
问题情况
qemu 启动命令如下
qemu-system-x86_64 -kernel arch/x86_64/boot/bzImage -nographic -append "console=ttyS0 nokaslr" -initrd ./ramdisk.img -m 1024 -s -S启动之后 日志输出如下
warning: TCG doesn't support requested feature: CPUID.01H:ECX.vmx [bit 5]
[ 0.000000] Linux version 4.10.14 (root@ubuntu) (gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.12) ) #1 SMP Fri Dec 24 22:43:53 PST 2021
[ 0.000000] Command line: console=ttyS0 nokaslr
[ 0.000000] KERNEL supported cpus:
[ 0.000000] Intel GenuineIntel
[ 0.000000] AMD AuthenticAMD
[ 0.000000] Centaur CentaurHauls
[ 0.000000] x86/fpu: Legacy x87 FPU detected.
[ 0.000000] e820: Bios-provided physical RAM map:
[ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable
[ 0.000000] BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved
[ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x000000003ffdffff] usable
[ 0.000000] BIOS-e820: [mem 0x000000003ffe0000-0x000000003fffffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fffc0000-0x00000000ffffffff] reserved
[ 0.000000] NX (Execute Disable) protection: active
[ 0.000000] SMBIOS 2.8 present.
[ 0.000000] DMI: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[ 0.000000] e820: last_pfn = 0x3ffe0 max_arch_pfn = 0x400000000
[ 0.000000] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WC UC- WT
[ 0.000000] found SMP MP-table at [mem 0x000f6640-0x000f664f] mapped at [ffff8800000f6640]
[ 0.000000] Scanning 1 areas for low memory corruption
[ 0.000000] RAMDISK: [mem 0x2c642000-0x3ffdffff]
[ 0.000000] ACPI: Early table checksum verification disabled
[ 0.000000] ACPI: RSDP 0x00000000000F6460 000014 (v00 BOCHS )
[ 0.000000] ACPI: RSDT 0x000000003FFE16EE 000034 (v01 BOCHS BXPCRSDT 00000001 BXPC 00000001)
[ 0.000000] ACPI: FACP 0x000000003FFE0C14 000074 (v01 BOCHS BXPCFACP 00000001 BXPC 00000001)
[ 0.000000] ACPI: DSDT 0x000000003FFE0040 000BD4 (v01 BOCHS BXPCDSDT 00000001 BXPC 00000001)
[ 0.000000] ACPI: FACS 0x000000003FFE0000 000040
[ 0.000000] ACPI: SSDT 0x000000003FFE0C88 0009B6 (v01 BOCHS BXPCSSDT 00000001 BXPC 00000001)
[ 0.000000] ACPI: APIC 0x000000003FFE163E 000078 (v01 BOCHS BXPCAPIC 00000001 BXPC 00000001)
[ 0.000000] ACPI: HPET 0x000000003FFE16B6 000038 (v01 BOCHS BXPCHPET 00000001 BXPC 00000001)
[ 0.000000] No NUMA configuration found
[ 0.000000] Faking a node at [mem 0x0000000000000000-0x000000003ffdffff]
[ 0.000000] NODE_DATA(0) allocated [mem 0x2c63d000-0x2c641fff]
[ 0.000000] Zone ranges:
[ 0.000000] DMA [mem 0x0000000000001000-0x0000000000ffffff]
[ 0.000000] DMA32 [mem 0x0000000001000000-0x000000003ffdffff]
[ 0.000000] Normal empty
[ 0.000000] Device empty
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000000001000-0x000000000009efff]
[ 0.000000] node 0: [mem 0x0000000000100000-0x000000003ffdffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000000001000-0x000000003ffdffff]
[ 0.000000] ACPI: PM-Timer IO Port: 0x608
[ 0.000000] ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1])
[ 0.000000] IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level)
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level)
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level)
[ 0.000000] Using ACPI (MADT) for SMP configuration information
[ 0.000000] ACPI: HPET id: 0x8086a201 base: 0xfed00000
[ 0.000000] smpboot: Allowing 1 CPUs, 0 hotplug CPUs
[ 0.000000] PM: Registered nosave memory: [mem 0x00000000-0x00000fff]
[ 0.000000] PM: Registered nosave memory: [mem 0x0009f000-0x0009ffff]
[ 0.000000] PM: Registered nosave memory: [mem 0x000a0000-0x000effff]
[ 0.000000] PM: Registered nosave memory: [mem 0x000f0000-0x000fffff]
[ 0.000000] e820: [mem 0x40000000-0xfffbffff] available for PCI devices
[ 0.000000] Booting paravirtualized kernel on bare hardware
[ 0.000000] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645519600211568 ns
[ 0.000000] setup_percpu: NR_CPUS:512 nr_cpumask_bits:512 nr_cpu_ids:1 nr_node_ids:1
[ 0.000000] percpu: Embedded 36 pages/cpu @ffff88002c400000 s108440 r8192 d30824 u2097152
[ 0.000000] Built 1 zonelists in Node order, mobility grouping on. Total pages: 257897
[ 0.000000] Policy zone: DMA32
[ 0.000000] Kernel command line: console=ttyS0 nokaslr
[ 0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
[ 0.000000] Memory: 691472K/1048056K available (8793K kernel code, 1460K rwdata, 3684K rodata, 1572K init, 1284K bss, 356584K reserved, 0K cma-reserved)
[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] Hierarchical RCU implementation.
[ 0.000000] Build-time adjustment of leaf fanout to 64.
[ 0.000000] RCU restricting CPUs from NR_CPUS=512 to nr_cpu_ids=1.
[ 0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=64, nr_cpu_ids=1
[ 0.000000] NR_IRQS:33024 nr_irqs:256 16
[ 0.000000] Console: colour VGA+ 80x25
[ 0.000000] console [ttyS0] enabled
[ 0.000000] clocksource: hpet: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604467 ns
[ 0.000000] tsc: Fast TSC calibration using PIT
[ 0.000000] tsc: Detected 2399.301 MHz processor
[ 0.008976] Calibrating delay loop (skipped), value calculated using timer frequency.. 4798.60 BogoMIPS (lpj=9597204)
[ 0.009460] pid_max: default: 32768 minimum: 301
[ 0.009806] ACPI: Core revision 20160930
[ 0.033544] ACPI: 2 ACPI AML tables successfully acquired and loaded
[ 0.035030] Security Framework initialized
[ 0.035242] Yama: becoming mindful.
[ 0.036582] AppArmor: AppArmor initialized
[ 0.038431] Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes)
[ 0.039740] Inode-cache hash table entries: 65536 (order: 7, 524288 bytes)
[ 0.041637] Mount-cache hash table entries: 2048 (order: 2, 16384 bytes)
[ 0.041979] Mountpoint-cache hash table entries: 2048 (order: 2, 16384 bytes)
[ 0.053902] mce: CPU supports 10 MCE banks
[ 0.055571] Last level iTLB entries: 4KB 0, 2MB 0, 4MB 0
[ 0.056066] Last level dTLB entries: 4KB 0, 2MB 0, 4MB 0, 1GB 0
[ 0.272597] Freeing SMP alternatives memory: 32K
[ 0.281666] ftrace: allocating 33429 entries in 131 pages
[ 0.350316] smpboot: Max logical packages: 1
[ 0.356734] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
[ 0.400000] smpboot: CPU0: AMD QEMU Virtual CPU version 2.5+ (family: 0x6, model: 0x6, stepping: 0x3)
[ 0.401890] Performance Events: PMU not available due to virtualization, using software events only.
[ 0.412240] NMI watchdog: disabled (cpu0): hardware events not enabled
[ 0.412479] NMI watchdog: Shutting down hard lockup detector on all cpus
[ 0.414319] smp: Bringing up secondary CPUs ...
[ 0.414494] smp: Brought up 1 node, 1 CPU
[ 0.414648] smpboot: Total of 1 processors activated (4798.60 BogoMIPS)
[ 0.422535] devtmpfs: initialized
[ 0.424860] x86/mm: Memory block size: 128MB
[ 0.433479] evm: security.selinux
[ 0.433593] evm: security.SMACK64
[ 0.433708] evm: security.SMACK64EXEC
[ 0.433877] evm: security.SMACK64TRANSMUTE
[ 0.434181] evm: security.SMACK64MMAP
[ 0.434483] evm: security.ima
[ 0.434764] evm: security.capability
[ 0.436944] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
[ 0.437541] futex hash table entries: 256 (order: 2, 16384 bytes)
[ 0.438968] pinctrl core: initialized pinctrl subsystem
[ 0.445457] RTC time: 10:26:35, date: 12/25/21
[ 0.449736] NET: Registered protocol family 16
[ 0.454981] cpuidle: using governor ladder
[ 0.455495] cpuidle: using governor menu
[ 0.456075] PCCT header not found.
[ 0.456908] ACPI: bus type PCI registered
[ 0.457112] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
[ 0.458733] PCI: Using configuration type 1 for base access
[ 0.471268] HugeTLB registered 2 MB page size, pre-allocated 0 pages
[ 0.475716] ACPI: Added _OSI(Module Device)
[ 0.475883] ACPI: Added _OSI(Processor Device)
[ 0.476084] ACPI: Added _OSI(3.0 _SCP Extensions)
[ 0.476305] ACPI: Added _OSI(Processor Aggregator Device)
[ 0.489764] ACPI: Interpreter enabled
[ 0.490497] ACPI: (supports S0 S3 S4 S5)
[ 0.490683] ACPI: Using IOAPIC for interrupt routing
[ 0.491888] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[ 0.516694] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
[ 0.517346] acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments MSI]
[ 0.517925] acpi PNP0A03:00: _OSC failed (AE_NOT_FOUND); disabling ASPM
[ 0.518704] acpi PNP0A03:00: fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge.
[ 0.523541] acpiphp: Slot [3] registered
[ 0.524190] acpiphp: Slot [4] registered
[ 0.524533] acpiphp: Slot [5] registered
[ 0.524955] acpiphp: Slot [6] registered
[ 0.525340] acpiphp: Slot [7] registered
[ 0.525642] acpiphp: Slot [8] registered
[ 0.526040] acpiphp: Slot [9] registered
[ 0.526454] acpiphp: Slot [10] registered
[ 0.526937] acpiphp: Slot [11] registered
[ 0.527334] acpiphp: Slot [12] registered
[ 0.527753] acpiphp: Slot [13] registered
[ 0.528259] acpiphp: Slot [14] registered
[ 0.528589] acpiphp: Slot [15] registered
[ 0.529089] acpiphp: Slot [16] registered
[ 0.529546] acpiphp: Slot [17] registered
[ 0.530128] acpiphp: Slot [18] registered
[ 0.530710] acpiphp: Slot [19] registered
[ 0.531270] acpiphp: Slot [20] registered
[ 0.531737] acpiphp: Slot [21] registered
[ 0.532199] acpiphp: Slot [22] registered
[ 0.532517] acpiphp: Slot [23] registered
[ 0.532937] acpiphp: Slot [24] registered
[ 0.533392] acpiphp: Slot [25] registered
[ 0.533692] acpiphp: Slot [26] registered
[ 0.534159] acpiphp: Slot [27] registered
[ 0.534577] acpiphp: Slot [28] registered
[ 0.534966] acpiphp: Slot [29] registered
[ 0.535355] acpiphp: Slot [30] registered
[ 0.536059] acpiphp: Slot [31] registered
[ 0.536376] PCI host bridge to bus 0000:00
[ 0.536628] pci_bus 0000:00: root bus resource [io 0x0000-0x0cf7 window]
[ 0.536875] pci_bus 0000:00: root bus resource [io 0x0d00-0xffff window]
[ 0.537057] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window]
[ 0.537333] pci_bus 0000:00: root bus resource [mem 0x40000000-0xfebfffff window]
[ 0.537717] pci_bus 0000:00: root bus resource [bus 00-ff]
[ 0.543436] pci 0000:00:01.1: legacy IDE quirk: reg 0x10: [io 0x01f0-0x01f7]
[ 0.543660] pci 0000:00:01.1: legacy IDE quirk: reg 0x14: [io 0x03f6]
[ 0.543930] pci 0000:00:01.1: legacy IDE quirk: reg 0x18: [io 0x0170-0x0177]
[ 0.544049] pci 0000:00:01.1: legacy IDE quirk: reg 0x1c: [io 0x0376]
[ 0.545169] pci 0000:00:01.3: quirk: [io 0x0600-0x063f] claimed by PIIX4 ACPI
[ 0.545426] pci 0000:00:01.3: quirk: [io 0x0700-0x070f] claimed by PIIX4 SMB
[ 0.561006] ACPI: PCI Interrupt Link [LNKA] (IRQs 5 *10 11)
[ 0.562045] ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11)
[ 0.562599] ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11)
[ 0.563146] ACPI: PCI Interrupt Link [LNKD] (IRQs 5 10 *11)
[ 0.563646] ACPI: PCI Interrupt Link [LNKS] (IRQs *9)
[ 0.565612] ACPI: Enabled 16 GPEs in block 00 to 0F
[ 0.569392] pci 0000:00:02.0: vgaarb: setting as boot VGA device
[ 0.569772] pci 0000:00:02.0: vgaarb: VGA device added: decodes=io+mem,owns=io+mem,locks=none
[ 0.570339] pci 0000:00:02.0: vgaarb: bridge control possible
[ 0.570559] vgaarb: loaded
[ 0.572863] SCSI subsystem initialized
[ 0.573737] ACPI: bus type USB registered
[ 0.574268] usbcore: registered new interface driver usbfs
[ 0.574866] usbcore: registered new interface driver hub
[ 0.575334] usbcore: registered new device driver usb
[ 0.576978] PCI: Using ACPI for IRQ routing
[ 0.582404] NetLabel: Initializing
[ 0.582533] NetLabel: domain hash size = 128
[ 0.582617] NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO
[ 0.583694] NetLabel: unlabeled traffic allowed by default
[ 0.584969] HPET: 3 timers in total, 0 timers will be used for per-cpu timer
[ 0.585474] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0
[ 0.585767] hpet0: 3 comparators, 64-bit 100.000000 MHz counter
[ 0.590351] clocksource: Switched to clocksource hpet
[ 0.647356] VFS: Disk quotas dquot_6.6.0
[ 0.647786] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[ 0.650443] AppArmor: AppArmor Filesystem Enabled
[ 0.651528] pnp: PnP ACPI init
[ 0.655891] pnp: PnP ACPI: found 6 devices
[ 0.674344] clocksource: acpi_pm: mask: 0xffffff max_cycles: 0xffffff, max_idle_ns: 2085701024 ns
[ 0.676229] NET: Registered protocol family 2
[ 0.680750] TCP established hash table entries: 8192 (order: 4, 65536 bytes)
[ 0.681374] TCP bind hash table entries: 8192 (order: 5, 131072 bytes)
[ 0.681969] TCP: Hash tables configured (established 8192 bind 8192)
[ 0.682698] UDP hash table entries: 512 (order: 2, 16384 bytes)
[ 0.683162] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
[ 0.684687] NET: Registered protocol family 1
[ 0.685411] pci 0000:00:00.0: Limiting direct PCI/PCI transfers
[ 0.686050] pci 0000:00:01.0: PIIX3: Enabling Passive Release
[ 0.686568] pci 0000:00:01.0: Activating ISA DMA hang workarounds
[ 0.687421] pci 0000:00:02.0: Video device with shadowed ROM at [mem 0x000c0000-0x000dffff]
[ 0.691682] Trying to unpack rootfs image as initramfs...
[ 5.697574] rootfs image is not initramfs (write error); looks like an initrd
[ 5.698326] /initrd.image: incomplete write (-28 != 328847518)
[ 5.841366] Freeing initrd memory: 321144K
[ 5.842861] Scanning for low memory corruption every 60 seconds
[ 5.845950] audit: initializing netlink subsys (disabled)
[ 5.848782] Initialise system trusted keyrings
[ 5.849867] audit: type=2000 audit(1640428000.844:1): initialized
[ 5.851123] workingset: timestamp_bits=40 max_order=18 bucket_order=0
[ 5.863639] zbud: loaded
[ 5.870221] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 5.874479] fuse init (API version 7.26)
[ 5.881723] Key type asymmetric registered
[ 5.881838] Asymmetric key parser 'x509' registered
[ 5.882511] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 248)
[ 5.883055] io scheduler noop registered
[ 5.883160] io scheduler deadline registered (default)
[ 5.883466] io scheduler cfq registered
[ 5.886457] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
[ 5.886863] ACPI: Power Button [PWRF]
[ 5.890936] GHES: HEST is not enabled!
[ 5.891960] Serial: 8250/16550 driver, 32 ports, IRQ sharing enabled
[ 5.914295] 00:05: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
[ 5.926829] Linux agpgart interface v0.103
[ 5.959311] brd: module loaded
[ 5.973161] loop: module loaded
[ 5.983127] scsi host0: ata_piix
[ 5.985606] scsi host1: ata_piix
[ 5.986687] ata1: PATA max MWDMA2 cmd 0x1f0 ctl 0x3f6 bmdma 0xc040 irq 14
[ 5.986967] ata2: PATA max MWDMA2 cmd 0x170 ctl 0x376 bmdma 0xc048 irq 15
[ 5.992752] libphy: Fixed MDIO Bus: probed
[ 5.992901] tun: Universal TUN/TAP device driver, 1.6
[ 5.992997] tun: (C) 1999-2004 Max Krasnyansky <maxk@qualcomm.com>
[ 5.993788] PPP generic driver version 2.4.2
[ 5.995366] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 5.995737] ehci-pci: EHCI PCI platform driver
[ 5.996761] ehci-platform: EHCI generic platform driver
[ 5.997618] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 5.998438] ohci-pci: OHCI PCI platform driver
[ 5.998906] ohci-platform: OHCI generic platform driver
[ 5.999625] uhci_hcd: USB Universal Host Controller Interface driver
[ 6.001553] i8042: PNP: PS/2 Controller [PNP0303:KBD,PNP0f13:MOU] at 0x60,0x64 irq 1,12
[ 6.003888] serio: i8042 KBD port at 0x60,0x64 irq 1
[ 6.004839] serio: i8042 AUX port at 0x60,0x64 irq 12
[ 6.006465] mousedev: PS/2 mouse device common for all mice
[ 6.009843] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input1
[ 6.011671] rtc_cmos 00:00: RTC can wake from S4
[ 6.013498] rtc_cmos 00:00: rtc core: registered rtc_cmos as rtc0
[ 6.014461] rtc_cmos 00:00: alarms up to one day, 114 bytes nvram, hpet irqs
[ 6.015009] i2c /dev entries driver
[ 6.015863] device-mapper: uevent: version 1.0.3
[ 6.017458] device-mapper: ioctl: 4.35.0-ioctl (2016-06-23) initialised: dm-devel@redhat.com
[ 6.018676] ledtrig-cpu: registered to indicate activity on CPUs
[ 6.021343] NET: Registered protocol family 10
[ 6.027776] Segment Routing with IPv6
[ 6.028679] NET: Registered protocol family 17
[ 6.029259] Key type dns_resolver registered
[ 6.032810] registered taskstats version 1
[ 6.033187] Loading compiled-in X.509 certificates
[ 6.044235] Loaded X.509 cert 'Build time autogenerated kernel key: 908857a52a36906b03c14304497a4a563dfab2c3'
[ 6.045915] zswap: loaded using pool lzo/zbud
[ 6.049172] Key type trusted registered
[ 6.051278] Key type encrypted registered
[ 6.051465] AppArmor: AppArmor sha1 policy hashing enabled
[ 6.052589] ima: No TPM chip found, activating TPM-bypass! (rc=-19)
[ 6.054740] evm: HMAC attrs: 0x1
[ 6.056946] Magic number: 1:351:427
[ 6.057686] rtc_cmos 00:00: setting system clock to 2021-12-25 10:26:41 UTC (1640428001)
[ 6.059463] BIOS EDD facility v0.16 2004-Jun-25, 0 devices found
[ 6.059648] EDD information not available.
[ 6.160297] ata2.00: ATAPI: QEMU DVD-ROM, 2.5+, max UDMA/100
[ 6.162592] ata2.00: configured for MWDMA2
[ 6.174858] scsi 1:0:0:0: CD-ROM QEMU QEMU DVD-ROM 2.5+ PQ: 0 ANSI: 5
[ 6.192956] sr 1:0:0:0: [sr0] scsi3-mmc drive: 4x/4x cd/rw xa/form2 tray
[ 6.193546] cdrom: Uniform CD-ROM driver Revision: 3.20
[ 6.197524] sr 1:0:0:0: Attached scsi generic sg0 type 5
[ 6.198856] md: Waiting for all devices to be available before autodetect
[ 6.199368] md: If you don't use raid, use raid=noautodetect
[ 6.202209] md: Autodetecting RAID arrays.
[ 6.202371] md: autorun ...
[ 6.202487] md: ... autorun DONE.
[ 6.203479] RAMDISK: Couldn't find valid RAM disk image starting at 0.
[ 6.205360] VFS: Cannot open root device "(null)" or unknown-block(0,0): error -6
[ 6.205642] Please append a correct "root=" boot option; here are the available partitions:
[ 6.206231] 0100 65536 ram0
[ 6.206258] (driver?)
[ 6.206613] 0101 65536 ram1
[ 6.206621] (driver?)
[ 6.206904] 0102 65536 ram2
[ 6.206927] (driver?)
[ 6.207149] 0103 65536 ram3
[ 6.207154] (driver?)
[ 6.207481] 0104 65536 ram4
[ 6.207486] (driver?)
[ 6.208476] 0105 65536 ram5
[ 6.208483] (driver?)
[ 6.208840] 0106 65536 ram6
[ 6.208846] (driver?)
[ 6.209100] 0107 65536 ram7
[ 6.209104] (driver?)
[ 6.209359] 0108 65536 ram8
[ 6.209369] (driver?)
[ 6.209574] 0109 65536 ram9
[ 6.209577] (driver?)
[ 6.209866] 010a 65536 ram10
[ 6.209870] (driver?)
[ 6.210148] 010b 65536 ram11
[ 6.210151] (driver?)
[ 6.210278] 010c 65536 ram12
[ 6.210282] (driver?)
[ 6.210510] 010d 65536 ram13
[ 6.210588] (driver?)
[ 6.210866] 010e 65536 ram14
[ 6.210870] (driver?)
[ 6.211062] 010f 65536 ram15
[ 6.211143] (driver?)
[ 6.211423] 0b00 1048575 sr0
[ 6.211451] driver: sr
[ 6.211780] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[ 6.212289] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.10.14 #1
[ 6.212289] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[ 6.212289] Call Trace:
[ 6.212289] dump_stack+0x63/0x90
[ 6.212289] panic+0xe4/0x22d
[ 6.212289] mount_block_root+0x1f8/0x2bf
[ 6.212289] mount_root+0x65/0x68
[ 6.212289] prepare_namespace+0x16a/0x1a2
[ 6.212289] kernel_init_freeable+0x1ee/0x217
[ 6.212289] ? rest_init+0x80/0x80
[ 6.212289] kernel_init+0xe/0x100
[ 6.212289] ret_from_fork+0x2c/0x40
[ 6.212289] Kernel Offset: disabled
[ 6.212289] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
处理方式
增加 root 配置
qemu-system-x86_64 -kernel arch/x86_64/boot/bzImage -nographic -append "root=/dev/sda1 console=ttyS0" -initrd ./ramdisk.img -m 2048 -s -S完
以上是关于01 qemu 启动编译好的镜像 VFS: Unable to mount root fs on unknown-block(0,0)的主要内容，如果未能解决你的问题，请参考以下文章
VMware Ubuntu 20.04 LTS 使用Qemu虚拟机u-boot启动或者配合busybox模拟ARM开发板