peter@peter-ThinkPad-T430:~/work/src/qemu-2.0.2$ qemu-system-arm -M vexpress-a9 -m 512M -kernel /home/ivan/kernel_git/linux/arch/arm/boot/zImage -nographic -append "console=ttyAMA0"
/home/ivan/kernel_git/linux/arch/arm/boot/zImage: No such file or directory
qemu: could not load kernel '/home/ivan/kernel_git/linux/arch/arm/boot/zImage'
peter@peter-ThinkPad-T430:~/work/src/qemu-2.0.2$ sudo qemu-system-arm -M vexpress-a9 -m 512M -kernel /home/ivan/kernel_git/linux/arch/arm/boot/zImage -nographic -append "console=ttyAMA0"
/home/ivan/kernel_git/linux/arch/arm/boot/zImage: No such file or directory
qemu: could not load kernel '/home/ivan/kernel_git/linux/arch/arm/boot/zImage'
peter@peter-ThinkPad-T430:~/work/src/qemu-2.0.2$ 
peter@peter-ThinkPad-T430:~/work/src/qemu-2.0.2$ 
peter@peter-ThinkPad-T430:~/work/src/qemu-2.0.2$ 
peter@peter-ThinkPad-T430:~/work/src/qemu-2.0.2$ 
peter@peter-ThinkPad-T430:~/work/src/qemu-2.0.2$ qemu-system-arm -M vexpress-a9 -m 512M -kernel /home/peter/work/src/linux/linux/arch/arm/boot/zImage -nographic -append "console=ttyAMA0"
Booting Linux on physical CPU 0x0
Initializing cgroup subsys cpuset
Linux version 3.16.0+ (peter@peter-ThinkPad-T430) (gcc version 4.7.3 (Ubuntu/Linaro 4.7.3-12ubuntu1) ) #3 SMP Sun Mar 19 16:35:52 CST 2017
CPU: ARMv7 Processor [410fc090] revision 0 (ARMv7), cr=10c53c7d
CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
Machine: ARM-Versatile Express
Memory policy: Data cache writeback
CPU: All CPU(s) started in SVC mode.
sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 178956969942ns
PERCPU: Embedded 7 pages/cpu @9fbed000 s7552 r8192 d12928 u32768
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 130048
Kernel command line: console=ttyAMA0
PID hash table entries: 2048 (order: 1, 8192 bytes)
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
Memory: 513272K/524288K available (4563K kernel code, 190K rwdata, 1288K rodata, 247K init, 150K bss, 11016K reserved)
Virtual kernel memory layout:
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    fixmap  : 0xffc00000 - 0xffe00000   (2048 kB)
    vmalloc : 0xa0800000 - 0xff000000   (1512 MB)
    lowmem  : 0x80000000 - 0xa0000000   ( 512 MB)
    modules : 0x7f000000 - 0x80000000   (  16 MB)
      .text : 0x80008000 - 0x805bf0a0   (5853 kB)
      .init : 0x805c0000 - 0x805fdd80   ( 248 kB)
      .data : 0x805fe000 - 0x8062dac0   ( 191 kB)
       .bss : 0x8062dac8 - 0x806532e8   ( 151 kB)
SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
Hierarchical RCU implementation.
	RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=1.
RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1
NR_IRQS:16 nr_irqs:16 16
GIC CPU mask not found - kernel will fail to boot.
GIC CPU mask not found - kernel will fail to boot.
smp_twd: clock not found -2
L2C: DT/platform modifies aux control register: 0x02020000 -> 0x02420000
L2C-310 enabling early BRESP for Cortex-A9
L2C-310 full line of zeros enabled for Cortex-A9
L2C-310 dynamic clock gating disabled, standby mode disabled
L2C-310 cache controller enabled, 8 ways, 128 kB
L2C-310: CACHE_ID 0x410000c8, AUX_CTRL 0x46420001
Console: colour dummy device 80x30
Calibrating local timer... 90.28MHz.
Calibrating delay loop... 528.38 BogoMIPS (lpj=2641920)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
CPU: Testing write buffer coherency: ok
missing device node for CPU 0
CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
Setting up static identity map for 0x60454520 - 0x60454578
Brought up 1 CPUs
SMP: Total of 1 processors activated.
CPU: All CPU(s) started in SVC mode.
devtmpfs: initialized
VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 0
regulator-dummy: no parameters
NET: Registered protocol family 16
DMA: preallocated 256 KiB pool for atomic coherent allocations
cpuidle: using governor ladder
cpuidle: using governor menu
hw-breakpoint: debug architecture 0x0 unsupported.
Serial: AMBA PL011 UART driver
mb:uart0: ttyAMA0 at MMIO 0x10009000 (irq = 37, base_baud = 0) is a PL011 rev1
console [ttyAMA0] enabled
mb:uart1: ttyAMA1 at MMIO 0x1000a000 (irq = 38, base_baud = 0) is a PL011 rev1
mb:uart2: ttyAMA2 at MMIO 0x1000b000 (irq = 39, base_baud = 0) is a PL011 rev1
mb:uart3: ttyAMA3 at MMIO 0x1000c000 (irq = 40, base_baud = 0) is a PL011 rev1
fixed-dummy: no parameters
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
Advanced Linux Sound Architecture Driver Initialized.
Switched to clocksource v2m-timer1
NET: Registered protocol family 2
TCP established hash table entries: 4096 (order: 2, 16384 bytes)
TCP bind hash table entries: 4096 (order: 3, 32768 bytes)
TCP: Hash tables configured (established 4096 bind 4096)
TCP: reno registered
UDP hash table entries: 256 (order: 1, 8192 bytes)
UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)
NET: Registered protocol family 1
RPC: Registered named UNIX socket transport module.
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
CPU PMU: probing PMU on CPU 0
hw perfevents: enabled with ARMv7 Cortex-A9 PMU driver, 1 counters available
futex hash table entries: 256 (order: 2, 16384 bytes)
squashfs: version 4.0 (2009/01/31) Phillip Lougher
jffs2: version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
9p: Installing v9fs 9p2000 file system support
msgmni has been set to 1002
io scheduler noop registered (default)
clcd-pl11x ct:clcd: PL111 rev2 at 0x10020000
clcd-pl11x ct:clcd: CT-CA9X4 hardware, XVGA display
Console: switching to colour frame buffer device 128x48
physmap platform flash device: 04000000 at 40000000
physmap-flash: Found 2 x16 devices at 0x0 in 32-bit bank. Manufacturer ID 0x000000 Chip ID 0x000000
NOR chip too large to fit in mapping. Attempting to cope...
Intel/Sharp Extended Query Table at 0x0031
Using buffer write method
Reducing visibility of 131072KiB chip to 65536KiB
physmap platform flash device: 04000000 at 44000000
physmap-flash: Found 2 x16 devices at 0x0 in 32-bit bank. Manufacturer ID 0x000000 Chip ID 0x000000
NOR chip too large to fit in mapping. Attempting to cope...
Intel/Sharp Extended Query Table at 0x0031
Using buffer write method
Reducing visibility of 131072KiB chip to 65536KiB
Concatenating MTD devices:
(0): "physmap-flash"
(1): "physmap-flash"
into device "physmap-flash"
libphy: smsc911x-mdio: probed
smsc911x smsc911x eth0: attached PHY driver [Generic PHY] (mii_bus:phy_addr=smsc911x-fffffff:01, irq=-1)
smsc911x smsc911x eth0: MAC Address: 52:54:00:12:34:56
isp1760 isp1760: NXP ISP1760 USB Host Controller
isp1760 isp1760: new USB bus registered, assigned bus number 1
isp1760 isp1760: Scratch test failed.
isp1760 isp1760: can't setup: -19
isp1760 isp1760: USB bus 1 deregistered
isp1760: Failed to register the HCD device
usbcore: registered new interface driver usb-storage
mousedev: PS/2 mouse device common for all mice
rtc-pl031 mb:rtc: rtc core: registered pl031 as rtc0
mmci-pl18x mb:mmci: mmc0: PL181 manf 41 rev0 at 0x10005000 irq 41,42 (pio)
ledtrig-cpu: registered to indicate activity on CPUs
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
input: AT Raw Set 2 keyboard as /devices/mb:kmi0/serio0/input/input0
aaci-pl041 mb:aaci: ARM AC'97 Interface PL041 rev0 at 0x10004000, irq 43
aaci-pl041 mb:aaci: FIFO 512 entries
oprofile: using arm/armv7-ca9
TCP: cubic registered
NET: Registered protocol family 17
9pnet: Installing 9P2000 support
rtc-pl031 mb:rtc: setting system clock to 2017-03-19 09:29:52 UTC (1489915792)
ALSA device list:
  #0: ARM AC'97 Interface PL041 rev0 at 0x10004000, irq 43
input: ImExPS/2 Generic Explorer Mouse as /devices/mb:kmi1/serio1/input/input2
VFS: Cannot open root device "(null)" or unknown-block(0,0): error -6
Please append a correct "root=" boot option; here are the available partitions:
1f00          131072 mtdblock0  (driver?)
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.16.0+ #3
[<80013fcc>] (unwind_backtrace) from [<80010f84>] (show_stack+0x10/0x14)
[<80010f84>] (show_stack) from [<8044f824>] (dump_stack+0x74/0x90)
[<8044f824>] (dump_stack) from [<8044cc64>] (panic+0x90/0x1fc)
[<8044cc64>] (panic) from [<805c110c>] (mount_block_root+0x1a0/0x254)
[<805c110c>] (mount_block_root) from [<805c12b4>] (mount_root+0xf4/0x114)
[<805c12b4>] (mount_root) from [<805c1400>] (prepare_namespace+0x12c/0x190)
[<805c1400>] (prepare_namespace) from [<805c0d8c>] (kernel_init_freeable+0x1f4/0x240)
[<805c0d8c>] (kernel_init_freeable) from [<8044abe4>] (kernel_init+0x8/0xec)
[<8044abe4>] (kernel_init) from [<8000e4b8>] (ret_from_fork+0x14/0x3c)
---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)