Kernel

無法通過 qemu/kvm-tools 啟動 kvm 來賓

  • March 1, 2016

我正在使用ARM Foundation Model來模擬 arm-v8 環境（我需要 TrustZone 和 KVM），並且我在其上執行支持 kvm 的 linux 作為主機作業系統，核心版本是 3.14.0（我按照 虛擬開放系統指南。

但是，當嘗試執行客戶作業系統時，我遇到了一些問題（kvm-tools 和 qemu-system-aarch64）。以下是我遇到的：

所有工具和核心原始碼都來自上述指南，我使用預建構的二進製文件。但是我自己編譯了核心。

  1. KVM 工具：
  • 我使用在 virtualopensystems 網站 lkvm-static 中找到的預建構 kvm 工具
  • 當我啟動來賓核心時，它掛在bootconsole$$ earlycon0 $$禁用。我做了一些Google工作，但沒有發現太多。有人說這可能是因為設備樹錯誤，但我的指南中沒有 dtb 文件。
  1. qemu-系統-aarch64

  • 另外，我使用預建構的二進製文件

  • 當我啟動來賓核心時，它看起來很“正常”，直到它給出如下消息：

    • hwclock: can't open '/dev/misc/rtc': No such file or directory
    • modprobe: can't change directory to '3.14.0': No such file or directory
    • openvt: can't open '/dev/tty1': No such file or directory

  • QEMU 的完整日誌將在這個問題的最後一個。

需要提到的另一件事，主機作業系統的.config文件不是原始文件。原.config文件有 KVM 功能，但缺少對 DMA 相關功能的支持，這是我自己需要的。

所以我把它換成了.config3.18-rc核心中的。當然，它們根本不一樣，當我執行時make，我必須手動決定一些配置，我將它們都決定為預設。並且編譯後TrustZone功能正常，也生成了/dev/kvm，但是當我嘗試執行guest OS時，遇到了上面的問題。

誰能給我一些建議？

非常感謝。

楊騰

=========================================================

以下是使用 qemu 時的輸出：

   root@FVP:/data/qemu-kvm ./qemu-system-aarch64 --enable-kvm --nographic --kernel 
   Image --drive if=none,file=disk_oe64.img,id=fs --device virtio-blk-device,drive=fs -m 512 -M virt --cpu host --append "earlyprintk conosole=ttyAMA0 mem=512M rootwait root=/dev/vda rw"

   Initializing cgroup subsys cpu
   Linux version 3.14.0 (hamayun@hamayun-laptop) (gcc version 4.8.1 (Ubuntu/Linaro4.8.1-10ubuntu7) ) #1 SMP PREEMPT Tue Apr 29 15:37:35 CEST 2014
   CPU: AArch64 Processor [410fd000] revision 0
   No earlyprintk arguments passed.
   Memory limited to 512MB
   psci: probing function IDs from device-tree
   PERCPU: Embedded 11 pages/cpu @ffffffc01ffe7000 s16128 r8192 d20736 u45056
   Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 129280
   Kernel command line: earlyprintk conosole=ttyAMA0 mem=512M rootwait root=/dev/vda rw
   PID hash table entries: 2048 (order: 2, 16384 bytes)
   Dentry cache hash table entries: 65536 (order: 7, 524288 bytes)
   Inode-cache hash table entries: 32768 (order: 6, 262144 bytes)
   software IO TLB [mem 0x5b000000-0x5f000000] (64MB) mapped at [ffffffc01b000000-ffffffc01effffff]
   Memory: 436272K/524288K available (4122K kernel code, 357K rwdata, 1748K rodata, 243K init, 284K bss, 88016K reserved)
   Virtual kernel memory layout:
       vmalloc : 0xffffff8000000000 - 0xffffffbbffff0000   (245759 MB)
       vmemmap : 0xffffffbc00e00000 - 0xffffffbc01500000   (     7 MB)
       modules : 0xffffffbffc000000 - 0xffffffc000000000   (    64 MB)
       memory  : 0xffffffc000000000 - 0xffffffc020000000   (   512 MB)
         .init : 0xffffffc00063d000 - 0xffffffc000679f00   (   244 kB)
         .text : 0xffffffc000080000 - 0xffffffc00063ca14   (  5875 kB)
         .data : 0xffffffc00067a000 - 0xffffffc0006d37d0   (   358 kB)
   SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
   Preemptible hierarchical RCU implementation.
           RCU restricting CPUs from NR_CPUS=4 to nr_cpu_ids=1.
   RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1
   NR_IRQS:64 nr_irqs:64 0
   Architected cp15 timer(s) running at 100.00MHz (virt).
   sched_clock: 56 bits at 100MHz, resolution 10ns, wraps every 2748779069440ns
   Calibrating delay loop (skipped), value calculated using timer frequency.. 200.00 BogoMIPS (lpj=1000000)
   pid_max: default: 32768 minimum: 301
   Mount-cache hash table entries: 1024 (order: 1, 8192 bytes)
   Mountpoint-cache hash table entries: 1024 (order: 1, 8192 bytes)
   hw perfevents: enabled with arm/armv8-pmuv3 PMU driver, 1 counters available
   Brought up 1 CPUs
   SMP: Total of 1 processors activated.
   devtmpfs: initialized
   atomic64 test passed
   regulator-dummy: no parameters
   NET: Registered protocol family 16
   vdso: 2 pages (1 code, 1 data) at base ffffffc000681000
   hw-breakpoint: found 16 breakpoint and 16 watchpoint registers.
   Serial: AMBA PL011 UART driver
   9000000.pl011: ttyAMA0 at MMIO 0x9000000 (irq = 33, base_baud = 0) is a PL011 rev1
   console [ttyAMA0] enabled
   bio: create slab <bio-0> at 0
   SCSI subsystem initialized
   Switched to clocksource arch_sys_counter
   NET: Registered protocol family 2
   TCP established hash table entries: 4096 (order: 3, 32768 bytes)
   TCP bind hash table entries: 4096 (order: 4, 65536 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.
   kvm [1]: HYP mode not available
   futex hash table entries: 256 (order: 2, 16384 bytes)
   NFS: Registering the id_resolver key type
   Key type id_resolver registered
   Key type id_legacy registered
   nfs4filelayout_init: NFSv4 File Layout Driver Registering...
   fuse init (API version 7.22)
   9p: Installing v9fs 9p2000 file system support
   msgmni has been set to 852
   io scheduler noop registered
   io scheduler cfq registered (default)
   Serial: AMBA driver
   blk-mq: CPU -> queue map
     CPU 0 -> Queue 0
    vda: unknown partition table
   TCP: cubic registered
   NET: Registered protocol family 17
   9pnet: Installing 9P2000 support
   Key type dns_resolver registered
   regulator-dummy: disabling
   kjournald starting.  Commit interval 5 seconds
   EXT3-fs (vda): using internal journal
   EXT3-fs (vda): mounted filesystem with writeback data mode
   VFS: Mounted root (ext3 filesystem) on device 254:0.
   devtmpfs: mounted
   Freeing unused kernel memory: 240K (ffffffc00063d000 - ffffffc000679000)
   INIT: version 2.88 booting
   Mounting local filesystems...
   Starting udev
   udevd[384]: starting version 182
   Activating swap
   Starting Bootlog daemon: bootlogd.
   Initializing random number generator...
   random: dd urandom read with 5 bits of entropy available
   udev-cache: checking for /dev/shm/udev-regen... found.
   Populating dev cache
   Populating volatile Filesystems.
   Checking for -/run/lock-.
   Creating directory -/run/lock-.
   Checking for -/var/volatile/log-.
   Creating directory -/var/volatile/log-.
   Checking for -/var/volatile/tmp-.
   Creating directory -/var/volatile/tmp-.
   Target already exists. Skipping.
   Checking for -/var/lock-.
   Creating link -/var/lock- pointing to -/run/lock-.
   Checking for -/var/log-.
   Creating link -/var/log- pointing to -/var/volatile/log-.
   Checking for -/var/run-.
   Creating link -/var/run- pointing to -/run-.
   Checking for -/var/tmp-.
   Creating link -/var/tmp- pointing to -/var/volatile/tmp-.
   Checking for -/tmp-.
   Creating link -/tmp- pointing to -/var/tmp-.
   Checking for -/var/lock/subsys-.
   Creating directory -/var/lock/subsys-
   Checking for -/var/log/wtmp-.
   Creating file -/var/log/wtmp-.
   Checking for -/var/run/utmp-.
   Creating file -/var/run/utmp-.
   Checking for -/etc/resolv.conf-.
   Creating link -/etc/resolv.conf- pointing to -/var/run/resolv.conf-.
   Checking for -/var/run/resolv.conf-.
   Creating file -/var/run/resolv.conf-.
   Checking for -/var/log/boot-.
   Creating file -/var/log/boot-.
   Target already exists. Skipping.
   Checking for -/var/run/sepermit-.
   Creating directory -/var/run/sepermit-.
   Checking for -/var/run/sshd-.
   Creating directory -/var/run/sshd-.
   Checking for -/var/log/lastlog-.
   Creating file -/var/log/lastlog-.
   net.ipv4.conf.default.rp_filter = 1
   net.ipv4.conf.all.rp_filter = 1
   System time was Thu Jan  1 00:00:06 UTC 1970.
   Setting the System Clock using the Hardware Clock as reference...
   hwclock: can't open '/dev/misc/rtc': No such file or directory
   System Clock set. System local time is now Thu Jan  1 00:00:06 UTC 1970.
   Thu Jun 18 11:03:04 UTC 2015
   Saving the System Clock time to the Hardware Clock...
   hwclock: can't open '/dev/misc/rtc': No such file or directory
   Hardware Clock updated to Thu Jun 18 11:03:04 UTC 2015.
   INIT: Entering runlevel: 5
   Configuring network interfaces... ifconfig: SIOCGIFFLAGS: No such device
   Starting OpenBSD Secure Shell server: sshd
     generating ssh RSA key...
     generating ssh ECDSA key...
     generating ssh DSA key...
     generating ssh ED25519 key...
   done.
   Starting rpcbind daemon...done.
   starting statd: done
   System time was Thu Jun 18 11:03:36 UTC 2015.
   Setting the System Clock using the Hardware Clock as reference...
   hwclock: can't open '/dev/misc/rtc': No such file or directory
   System Clock set. System local time is now Thu Jun 18 11:03:36 UTC 2015.
   modprobe: can't change directory to '3.14.0': No such file or directory
   NFS daemon support not enabled in kernel
   Starting syslogd/klogd: done
   openvt: can't open '/dev/tty1': No such file or directory
   Starting auto-serial-console: done
   Stopping Bootlog daemon: bootlogd.
   INIT: no more processes left in this runlevel

原來是這個問題Image，我重新編譯核心然後就OK了。

但是lkvm-tools有一些問題，它不能正常初始化ioctl。

引用自：https://unix.stackexchange.com/questions/265783

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