On Thu, Aug 01, 2013 at 11:58:15AM +0100, Peter Maydell wrote: > Unfortunately at this point you run into the classic > issue of trying to get an ARM kernel running, which > is that a huge class of config errors all have the > failure mode "just sits there with no serial output". > This is remarkably user-unfriendly but I don't really > know how we could fix it since the underlying cause > is that serial ports on ARM aren't in a single standard > location, so if the kernel's not configured right it > won't find the serial port. I usually end up resorting > to running with gdb connected to qemu's debug stub > and fishing the kernel output out of its log_buf :-(
Yeah, probably I should fix virt-dmesg to work on ARM guests ... I don't know if there's a better list for asking these questions, but here's another one: ~/d/qemu/arm-softmmu/qemu-system-arm -m 512 -M vexpress-a9 \ -kernel kernel -initrd initrd \ -drive if=none,file=root,id=foo -device virtio-blk-device,drive=foo \ -append "root=/dev/vda console=ttyAMA0 rootwait debug" -serial stdio This command boots the kernel, loads the initrd, and loads the virtio modules, but the 'root' disk is never enumerated (see full messages attached). I wonder if I'm missing a kernel module for virtio-blk to work? The code that is running in the guest is here if you're interested: https://github.com/libguestfs/supermin/blob/master/helper/init.c --- I'd _really_ prefer to use virtio-scsi, since virtio-blk has all sorts of shortcomings. However I could work out the command line fu to enable virtio-scsi. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones virt-df lists disk usage of guests without needing to install any software inside the virtual machine. Supports Linux and Windows. http://people.redhat.com/~rjones/virt-df/
oss: Could not initialize DAC oss: Failed to open `/dev/dsp' oss: Reason: No such file or directory oss: Could not initialize DAC oss: Failed to open `/dev/dsp' oss: Reason: No such file or directory audio: Failed to create voice `lm4549.out' [ 0.000000] Booting Linux on physical CPU 0x0 [ 0.000000] Initializing cgroup subsys cpuset [ 0.000000] Initializing cgroup subsys cpu [ 0.000000] Linux version 3.9.9-302.fc19.armv7hl (mockbu...@arm04-builder00.arm.fedoraproject.org) (gcc version 4.8.1 20130603 (Red Hat 4.8.1-1) (GCC) ) #1 SMP Sun Jul 7 02:30:19 UTC 2013 [ 0.000000] CPU: ARMv7 Processor [410fc090] revision 0 (ARMv7), cr=10c5387d [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache [ 0.000000] Machine: ARM-Versatile Express [ 0.000000] Memory policy: ECC disabled, Data cache writealloc [ 0.000000] On node 0 totalpages: 131072 [ 0.000000] free_area_init_node: node 0, pgdat c08af680, node_mem_map c09a3000 [ 0.000000] Normal zone: 1024 pages used for memmap [ 0.000000] Normal zone: 0 pages reserved [ 0.000000] Normal zone: 131072 pages, LIFO batch:31 [ 0.000000] sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 178956ms [ 0.000000] PERCPU: Embedded 9 pages/cpu @c0da7000 s13056 r8192 d15616 u36864 [ 0.000000] pcpu-alloc: s13056 r8192 d15616 u36864 alloc=9*4096 [ 0.000000] pcpu-alloc: [0] 0 [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 130048 [ 0.000000] Kernel command line: root=/dev/vda console=ttyAMA0 rootwait debug [ 0.000000] PID hash table entries: 2048 (order: 1, 8192 bytes) [ 0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes) [ 0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes) [ 0.000000] __ex_table already sorted, skipping sort [ 0.000000] allocated 1048576 bytes of page_cgroup [ 0.000000] please try 'cgroup_disable=memory' option if you don't want memory cgroups [ 0.000000] Memory: 512MB = 512MB total [ 0.000000] Memory: 508080k/508080k available, 16208k reserved, 0K highmem [ 0.000000] Virtual kernel memory layout: [ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB) [ 0.000000] fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB) [ 0.000000] vmalloc : 0xe0800000 - 0xff000000 ( 488 MB) [ 0.000000] lowmem : 0xc0000000 - 0xe0000000 ( 512 MB) [ 0.000000] pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB) [ 0.000000] modules : 0xbf000000 - 0xbfe00000 ( 14 MB) [ 0.000000] .text : 0xc0008000 - 0xc07994bc (7750 kB) [ 0.000000] .init : 0xc079a000 - 0xc0817300 ( 501 kB) [ 0.000000] .data : 0xc0818000 - 0xc08bcf30 ( 660 kB) [ 0.000000] .bss : 0xc08bcf30 - 0xc09a2c48 ( 920 kB) [ 0.000000] SLUB: Genslabs=11, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 [ 0.000000] Hierarchical RCU implementation. [ 0.000000] RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=1. [ 0.000000] NR_IRQS:16 nr_irqs:16 16 [ 0.000000] GIC CPU mask not found - kernel will fail to boot. [ 0.000000] GIC CPU mask not found - kernel will fail to boot. [ 0.000000] smp_twd: clock not found -2 [ 0.000000] Console: colour dummy device 80x30 [ 0.411689] Calibrating delay loop... 317.03 BogoMIPS (lpj=1585152) [ 0.474478] pid_max: default: 32768 minimum: 301 [ 0.477877] Security Framework initialized [ 0.486420] SELinux: Initializing. [ 0.487542] SELinux: Starting in permissive mode [ 0.493488] Mount-cache hash table entries: 512 [ 0.524454] Initializing cgroup subsys cpuacct [ 0.524661] Initializing cgroup subsys memory [ 0.526533] Initializing cgroup subsys devices [ 0.526758] Initializing cgroup subsys freezer [ 0.527064] Initializing cgroup subsys net_cls [ 0.527251] Initializing cgroup subsys blkio [ 0.527404] Initializing cgroup subsys perf_event [ 0.529864] CPU: Testing write buffer coherency: ok [ 0.534160] ftrace: allocating 23282 entries in 46 pages [ 0.761116] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000 [ 0.762425] Setting up static identity map for 0xc0552c10 - 0xc0552c68 [ 0.820267] Brought up 1 CPUs [ 0.820542] SMP: Total of 1 processors activated (317.03 BogoMIPS). [ 0.820708] CPU: All CPU(s) started in SVC mode. [ 0.862247] devtmpfs: initialized [ 0.930991] atomic64 test passed [ 0.931158] pinctrl core: initialized pinctrl subsystem [ 0.947771] regulator-dummy: no parameters [ 0.956973] NET: Registered protocol family 16 [ 0.964155] DMA: preallocated 256 KiB pool for atomic coherent allocations [ 0.993450] L310 cache controller enabled [ 0.993593] l2x0: 8 ways, CACHE_ID 0x410000c8, AUX_CTRL 0x02420000, Cache size: 131072 B [ 1.001379] hw-breakpoint: debug architecture 0x0 unsupported. [ 1.003124] Serial: AMBA PL011 UART driver [ 1.007048] uart-pl011 mb:uart0: could not get default pinstate [ 1.008963] mb:uart0: ttyAMA0 at MMIO 0x10009000 (irq = 37) is a PL011 rev1 [ 1.096611] console [ttyAMA0] enabled [ 1.110688] uart-pl011 mb:uart1: could not get default pinstate [ 1.116064] mb:uart1: ttyAMA1 at MMIO 0x1000a000 (irq = 38) is a PL011 rev1 [ 1.125853] uart-pl011 mb:uart2: could not get default pinstate [ 1.132100] mb:uart2: ttyAMA2 at MMIO 0x1000b000 (irq = 39) is a PL011 rev1 [ 1.140628] uart-pl011 mb:uart3: could not get default pinstate [ 1.146353] mb:uart3: ttyAMA3 at MMIO 0x1000c000 (irq = 40) is a PL011 rev1 [ 1.205975] bio: create slab <bio-0> at 0 [ 1.220085] fixed-dummy: no parameters [ 1.231209] SCSI subsystem initialized [ 1.236978] libata version 3.00 loaded. [ 1.245164] usbcore: registered new interface driver usbfs [ 1.250743] usbcore: registered new interface driver hub [ 1.256689] usbcore: registered new device driver usb [ 1.287510] NetLabel: Initializing [ 1.290847] NetLabel: domain hash size = 128 [ 1.294501] NetLabel: protocols = UNLABELED CIPSOv4 [ 1.301551] NetLabel: unlabeled traffic allowed by default [ 1.307648] Switching to clocksource v2m-timer1 [ 1.760789] NET: Registered protocol family 2 [ 1.779931] TCP established hash table entries: 4096 (order: 3, 32768 bytes) [ 1.789193] TCP bind hash table entries: 4096 (order: 3, 32768 bytes) [ 1.795697] TCP: Hash tables configured (established 4096 bind 4096) [ 1.801733] TCP: reno registered [ 1.805250] UDP hash table entries: 256 (order: 1, 8192 bytes) [ 1.810560] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes) [ 1.823436] NET: Registered protocol family 1 [ 1.835604] RPC: Registered named UNIX socket transport module. [ 1.840650] RPC: Registered udp transport module. [ 1.844462] RPC: Registered tcp transport module. [ 1.848563] RPC: Registered tcp NFSv4.1 backchannel transport module. [ 1.866501] Unpacking initramfs... [ 1.932263] Freeing initrd memory: 756K [ 1.938555] CPU PMU: probing PMU on CPU 0 [ 1.943935] hw perfevents: enabled with ARMv7 Cortex-A9 PMU driver, 1 counters available [ 1.964068] audit: initializing netlink socket (disabled) [ 1.970960] type=2000 audit(1.520:1): initialized [ 2.978846] VFS: Disk quotas dquot_6.5.2 [ 2.983333] Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) [ 3.012738] NFS: Registering the id_resolver key type [ 3.020334] Key type id_resolver registered [ 3.023733] Key type id_legacy registered [ 3.032127] msgmni has been set to 993 [ 3.040951] SELinux: Registering netfilter hooks [ 3.099632] alg: No test for stdrng (krng) [ 3.102692] NET: Registered protocol family 38 [ 3.109888] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 252) [ 3.118987] io scheduler noop registered [ 3.121794] io scheduler deadline registered [ 3.128916] io scheduler cfq registered (default) [ 3.143196] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled [ 3.158575] Serial: AMBA driver [ 3.161697] uart-pl011 mb:uart0: no DMA platform data [ 3.166326] uart-pl011 mb:uart1: no DMA platform data [ 3.170435] uart-pl011 mb:uart2: no DMA platform data [ 3.174535] uart-pl011 mb:uart3: no DMA platform data [ 3.224027] loop: module loaded [ 3.234490] libphy: Fixed MDIO Bus: probed [ 3.242660] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver [ 3.248806] ehci-omap: OMAP-EHCI Host Controller driver [ 3.253432] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver [ 3.261218] usbcore: registered new interface driver usbserial [ 3.267377] usbcore: registered new interface driver usbserial_generic [ 3.273933] usbserial: USB Serial support registered for generic [ 3.282354] mousedev: PS/2 mouse device common for all mice [ 3.296821] rtc-pl031 mb:rtc: rtc core: registered pl031 as rtc0 [ 3.305451] device-mapper: uevent: version 1.0.3 [ 3.311826] device-mapper: ioctl: 4.24.0-ioctl (2013-01-15) initialised: dm-de...@redhat.com [ 3.320817] omap_cpufreq_init: unable to get MPU regulator [ 3.328315] mmci-pl18x mb:mmci: could not get default pinstate [ 3.331685] mmci-pl18x mb:mmci: mmc0: PL181 manf 41 rev0 at 0x10005000 irq 41,42 (pio) [ 3.332321] mmci-pl18x mb:mmci: no DMA platform data [ 3.378274] hidraw: raw HID events driver (C) Jiri Kosina [ 3.389921] usbcore: registered new interface driver usbhid [ 3.393333] usbhid: USB HID core driver [ 3.398149] drop_monitor: Initializing network drop monitor service [ 3.406858] ip_tables: (C) 2000-2006 Netfilter Core Team [ 3.414453] TCP: cubic registered [ 3.417195] Initializing XFRM netlink socket [ 3.424005] NET: Registered protocol family 10 [ 3.445361] mip6: Mobile IPv6 [ 3.447645] NET: Registered protocol family 17 [ 3.453325] Key type dns_resolver registered [ 3.460185] VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 0 [ 3.491723] ThumbEE CPU extension supported. [ 3.500837] Registering SWP/SWPB emulation handler [ 3.571345] registered taskstats version 1 [ 3.604295] rtc-pl031 mb:rtc: setting system clock to 2013-08-01 11:36:55 UTC (1375357015) [ 3.610018] sr_init: No PMIC hook to init smartreflex [ 3.618745] sr_init: platform driver register failed for SR [ 3.654447] Freeing init memory: 500K supermin: mounting /proc supermin: uptime: 3.35 0.35 supermin: ext2 mini initrd starting up: 4.1.1 zlib supermin: cmdline: root=/dev/vda console=ttyAMA0 rootwait debug supermin: mounting /sys supermin: internal insmod libcrc32c.ko supermin: internal insmod crc-itu-t.ko supermin: internal insmod crc32.ko [ 3.953305] alg: No test for crc32 (crc32-table) supermin: internal insmod crc-ccitt.ko supermin: internal insmod crc7.ko supermin: internal insmod crc8.ko supermin: internal insmod scsi_transport_spi.ko supermin: internal insmod virtio.ko supermin: internal insmod virtio_ring.ko supermin: internal insmod virtio-rng.ko supermin: internal insmod virtio_blk.ko supermin: internal insmod virtio_scsi.ko supermin: internal insmod virtio_net.ko supermin: internal insmod virtio_mmio.ko supermin: internal insmod virtio_balloon.ko supermin: waiting another 1024000000 ns for /sys/block/vda/dev to appear supermin: waiting another 2048000000 ns for /sys/block/vda/dev to appear supermin: waiting another 4096000000 ns for /sys/block/vda/dev to appear supermin: waiting another 8192000000 ns for /sys/block/vda/dev to appear supermin: waiting another 16384000000 ns for /sys/block/vda/dev to appear supermin: waiting another 32768000000 ns for /sys/block/vda/dev to appear supermin: waiting another 65536000000 ns for /sys/block/vda/dev to appear supermin: waiting another 131072000000 ns for /sys/block/vda/dev to appear qemu: terminating on signal 15 from pid 11242
