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Asked: 2017-04-13 06:28:11 +0800 CST

在 supermicro 板上启用虚拟化

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我正在尝试使用 qemu/kvm（在 Debian/jessie 上运行，带有3.16.0-4-amd64内核）在旧的 Supermicro 板上设置虚拟化服务器（主要用于进行一些实验）

该板配备了Intel XeonCPU，据我了解，它们应该支持虚拟化：

$ egrep '^flags.*(vmx|svm)' /proc/cpuinfo
flags       : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc pebs bts nopl pni dtes64 monitor ds_cpl vmx est cid cx16 xtpr pdcm lahf_lm tpr_shadow
$

无论vmx标志是否存在，KVM 都拒绝初始化：

$ dmesg | grep kvm
[    8.721594] kvm: disabled by bios
$

kvm-intel模块无法加载，qemu 退回到仿真模式（真的很慢…… ）

所以我重新启动了主机，进入了 BIOS 并在高级 CPU 设置中打开了虚拟化（它确实被关闭了）。

不幸的是，这并没有改变 ι，而且 KVM 仍然抱怨在 BIOS 中被禁用。

以下是有关我的硬件（CPU/主板）的一些详细信息：

root:~# dmidecode -t2
# dmidecode 2.12
SMBIOS 2.4 present.

Handle 0x0002, DMI type 2, 8 bytes
Base Board Information
    Manufacturer: Supermicro
    Product Name: X7DB8
    Version: PCB Version
    Serial Number: 0123456789

root:~# lscpu 
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                8
On-line CPU(s) list:   0-7
Thread(s) per core:    2
Core(s) per socket:    2
Socket(s):             2
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            15
Model:                 6
Model name:            Intel(R) Xeon(TM) CPU 3.00GHz
Stepping:              4
CPU MHz:               3000.146
BogoMIPS:              6000.62
Virtualization:        VT-x
L1d cache:             16K
L2 cache:              2048K
NUMA node0 CPU(s):     0-7
root:~# cpuid -1
CPU:
   vendor_id = "GenuineIntel"
   version information (1/eax):
      processor type  = primary processor (0)
      family          = Intel Pentium 4/Pentium D/Pentium Extreme Edition/Celeron/Xeon/Xeon MP/Itanium2, AMD Athlon 64/Athlon XP-M/Opteron/Sempron/Turion (15)
      model           = 0x6 (6)
      stepping id     = 0x4 (4)
      extended family = 0x0 (0)
      extended model  = 0x0 (0)
      (simple synth)  = Intel Pentium 4 Processor 6x1 (Cedar Mill C1) / Pentium Extreme Edition Processor 955 (Presler C1) / Pentium D Processor 9xx (Presler C1) / Xeon Processor 5000 (Dempsey C1) / Celeron D Processor 3xx (Cedar Mill C1), 65nm
   miscellaneous (1/ebx):
      process local APIC physical ID = 0x1 (1)
      cpu count                      = 0x4 (4)
      CLFLUSH line size              = 0x8 (8)
      brand index                    = 0x0 (0)
   brand id = 0x00 (0): unknown
   feature information (1/edx):
      x87 FPU on chip                        = true
      virtual-8086 mode enhancement          = true
      debugging extensions                   = true
      page size extensions                   = true
      time stamp counter                     = true
      RDMSR and WRMSR support                = true
      physical address extensions            = true
      machine check exception                = true
      CMPXCHG8B inst.                        = true
      APIC on chip                           = true
      SYSENTER and SYSEXIT                   = true
      memory type range registers            = true
      PTE global bit                         = true
      machine check architecture             = true
      conditional move/compare instruction   = true
      page attribute table                   = true
      page size extension                    = true
      processor serial number                = false
      CLFLUSH instruction                    = true
      debug store                            = true
      thermal monitor and clock ctrl         = true
      MMX Technology                         = true
      FXSAVE/FXRSTOR                         = true
      SSE extensions                         = true
      SSE2 extensions                        = true
      self snoop                             = true
      hyper-threading / multi-core supported = true
      therm. monitor                         = true
      IA64                                   = false
      pending break event                    = true
   feature information (1/ecx):
      PNI/SSE3: Prescott New Instructions     = true
      PCLMULDQ instruction                    = false
      64-bit debug store                      = true
      MONITOR/MWAIT                           = true
      CPL-qualified debug store               = true
      VMX: virtual machine extensions         = true
      SMX: safer mode extensions              = false
      Enhanced Intel SpeedStep Technology     = true
      thermal monitor 2                       = false
      SSSE3 extensions                        = false
      context ID: adaptive or shared L1 data  = true
      FMA instruction                         = false
      CMPXCHG16B instruction                  = true
      xTPR disable                            = true
      perfmon and debug                       = true
      process context identifiers             = false
      direct cache access                     = false
      SSE4.1 extensions                       = false
      SSE4.2 extensions                       = false
      extended xAPIC support                  = false
      MOVBE instruction                       = false
      POPCNT instruction                      = false
      time stamp counter deadline             = false
      AES instruction                         = false
      XSAVE/XSTOR states                      = false
      OS-enabled XSAVE/XSTOR                  = false
      AVX: advanced vector extensions         = false
      F16C half-precision convert instruction = false
      RDRAND instruction                      = false
      hypervisor guest status                 = false
[...]
#

所以我的问题是：有人知道如何在那个 CPU/主板上启用虚拟化，还是我只是运气不好？

debian

1 个回答

  1. Best Answer

    除了在 BIOS 中打开 VT 外，您还需要执行完整的电源循环 - 完全关闭主机，甚至可以拔出电源线并按住电源按钮几秒钟，然后重新启动一切。

    顺便说一句，您可能在 BIOS 中错过了它，但您还希望启用 NX，而不仅仅是 VT。

    • 3

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