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    Nested Virtualization & GNS3 VM

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    • tsettleT
      tsettle
      last edited by

      Wondering if anyone has had any luck getting the GNS3 VM to function under XCP-ng. I've tried both the vmware and hyper-v images and neither one wants to work, though each works flawlessly under player and hyper-v.

      Google search has not been kind. The best I can come up with is something like "Xen has problems with nested virtualization," but nothing really all that helpful to get it working.

      In short, any time I try to fire up QEMU, the intermediate VM crashes with no log entries or even a message from the kernel on the console.

      Thanks,

      -Troy

      1 Reply Last reply Reply Quote 1
      • tsettleT
        tsettle
        last edited by

        Still plugging away at this. I've patched XCP-ng 8.1 (had a failed upgrade to 8.2 that I'm also working on). Anyways, here's the xl dmesg following a crashed VM.

        I've also tested nested virtualization by installing XCP-ng in a VM and installing a VM within that. Worked just fine.

        Not sure what's next other than trying again after upgrading to 8.2.

        (XEN) [00000065b5b3f240] Xen version 4.13.0-8.12.2 (mockbuild@[unknown]) (gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-28)) debug=n  Tue Jan 26 12:25:34 CET 2021
(XEN) [00000065b5b404e7] Latest ChangeSet: 85e1424de2dd, pq d251ff964c89
(XEN) [00000065b5b41f03] build-id: d518750b24eae6cc451da1475abde6b4ae390d93
(XEN) [00000065b5b4290f] Bootloader: GRUB 2.02
(XEN) [00000065b5b43486] Command line: dom0_mem=4304M,max:4304M watchdog ucode=scan dom0_max_vcpus=1-16 crashkernel=256M,below=4G console=vga vga=mode-0x0311
(XEN) [00000065b5b4438f] Xen image load base address: 0xcea00000
(XEN) [00000065b5b44c0c] Video information:
(XEN) [00000065b5b45852]  VGA is graphics mode 640x480, 16 bpp
(XEN) [00000065b5b4654c]  VBE/DDC methods: none; EDID transfer time: 0 seconds
(XEN) [00000065b5b4718f]  EDID info not retrieved because no DDC retrieval method detected
(XEN) [00000065b5b47caa] Disc information:
(XEN) [00000065b5b48443]  Found 11 MBR signatures
(XEN) [00000065b5b48c6d]  Found 6 EDD information structures
(XEN) [00000065b5b78a30] Xen-e820 RAM map:
(XEN) [00000065b5b79621]  0000000000000000 - 000000000009e000 (usable)
(XEN) [00000065b5b7a367]  0000000000100000 - 00000000cf379000 (usable)
(XEN) [00000065b5b7afdb]  00000000cf379000 - 00000000cf38f000 (reserved)
(XEN) [00000065b5b7bc89]  00000000cf38f000 - 00000000cf3ce000 (ACPI data)
(XEN) [00000065b5b7c903]  00000000cf3ce000 - 00000000d0000000 (reserved)
(XEN) [00000065b5b7d5c9]  00000000e0000000 - 00000000f0000000 (reserved)
(XEN) [00000065b5b7e1e1]  00000000fe000000 - 0000000100000000 (reserved)
(XEN) [00000065b5b7efa7]  0000000100000000 - 0000001030000000 (usable)
(XEN) [00000065b7c7ffa7] Kdump: 256MB (262144kB) at 0xbec00000
(XEN) [00000065b8232bc6] ACPI: RSDP 000F1530, 0024 (r2 DELL  )
(XEN) [00000065b82343c0] ACPI: XSDT 000F1634, 009C (r1 DELL   PE_SC3          1 DELL        1)
(XEN) [00000065b82366b0] ACPI: FACP CF3B3F9C, 00F4 (r3 DELL   PE_SC3          1 DELL        1)
(XEN) [00000065b8238c67] ACPI: DSDT CF38F000, 3B44 (r1 DELL   PE_SC3          1 INTL 20050624)
(XEN) [00000065b823a518] ACPI: FACS CF3B6000, 0040
(XEN) [00000065b823b540] ACPI: APIC CF3B3478, 015E (r1 DELL   PE_SC3          1 DELL        1)
(XEN) [00000065b823ca9e] ACPI: SPCR CF3B35D8, 0050 (r1 DELL   PE_SC3          1 DELL        1)
(XEN) [00000065b823de6a] ACPI: HPET CF3B362C, 0038 (r1 DELL   PE_SC3          1 DELL        1)
(XEN) [00000065b823f1d2] ACPI: DMAR CF3B3668, 01D0 (r1 DELL   PE_SC3          1 DELL        1)
(XEN) [00000065b8240683] ACPI: MCFG CF3B38C4, 003C (r1 DELL   PE_SC3          1 DELL        1)
(XEN) [00000065b82419cc] ACPI: WD__ CF3B3904, 0134 (r1 DELL   PE_SC3          1 DELL        1)
(XEN) [00000065b8242d6d] ACPI: SLIC CF3B3A3C, 0024 (r1 DELL   PE_SC3          1 DELL        1)
(XEN) [00000065b82441e1] ACPI: ERST CF392CE4, 0270 (r1 DELL   PE_SC3          1 DELL        1)
(XEN) [00000065b824565b] ACPI: HEST CF392F54, 03A8 (r1 DELL   PE_SC3          1 DELL        1)
(XEN) [00000065b8246b8f] ACPI: BERT CF392B44, 0030 (r1 DELL   PE_SC3          1 DELL        1)
(XEN) [00000065b8247ee4] ACPI: EINJ CF392B74, 0170 (r1 DELL   PE_SC3          1 DELL        1)
(XEN) [00000065b8249283] ACPI: SRAT CF3B3BC0, 0370 (r1 DELL   PE_SC3          1 DELL        1)
(XEN) [00000065b824a721] ACPI: TCPA CF3B3F34, 0064 (r2 DELL   PE_SC3          1 DELL        1)
(XEN) [00000065b824bbc9] ACPI: SSDT CF3B7000, 3FD4 (r1  INTEL PPM RCM  80000001 INTL 20061109)
(XEN) [00000065b829bba7] System RAM: 65523MB (67095644kB)
(XEN) [00000065c2555dcf] SRAT: PXM 1 -> APIC 20 -> Node 0
(XEN) [00000065c2556ade] SRAT: PXM 2 -> APIC 00 -> Node 1
(XEN) [00000065c255752a] SRAT: PXM 1 -> APIC 22 -> Node 0
(XEN) [00000065c2557f21] SRAT: PXM 2 -> APIC 02 -> Node 1
(XEN) [00000065c255891e] SRAT: PXM 1 -> APIC 32 -> Node 0
(XEN) [00000065c2559306] SRAT: PXM 2 -> APIC 12 -> Node 1
(XEN) [00000065c2559ccc] SRAT: PXM 1 -> APIC 34 -> Node 0
(XEN) [00000065c255a69e] SRAT: PXM 2 -> APIC 14 -> Node 1
(XEN) [00000065c255b086] SRAT: PXM 1 -> APIC 21 -> Node 0
(XEN) [00000065c255ba86] SRAT: PXM 2 -> APIC 01 -> Node 1
(XEN) [00000065c255c355] SRAT: PXM 1 -> APIC 23 -> Node 0
(XEN) [00000065c255cd21] SRAT: PXM 2 -> APIC 03 -> Node 1
(XEN) [00000065c255d6ed] SRAT: PXM 1 -> APIC 33 -> Node 0
(XEN) [00000065c255e192] SRAT: PXM 2 -> APIC 13 -> Node 1
(XEN) [00000065c255eb2a] SRAT: PXM 1 -> APIC 35 -> Node 0
(XEN) [00000065c255f4d5] SRAT: PXM 2 -> APIC 15 -> Node 1
(XEN) [00000065c256158f] SRAT: Node 1 PXM 2 0-d0000000
(XEN) [00000065c2562515] SRAT: Node 1 PXM 2 100000000-830000000
(XEN) [00000065c25632a7] SRAT: Node 0 PXM 1 830000000-1030000000
(XEN) [000000666cc1a509] Domain heap initialised DMA width 32 bits
(XEN) [000000669621180f] vesafb: framebuffer at 0x00000000d5800000, mapped to 0xffff82c000201000, using 2048k, total 8192k
(XEN) [0000006696212a4f] vesafb: mode is 640x480x16, linelength=1280, font 8x8
(XEN) [00000066962139ad] vesafb: Truecolor: size=0:5:6:5, shift=0:11:5:0
(XEN) [0000006696226309] CPU Vendor: Intel, Family 6 (0x6), Model 44 (0x2c), Stepping 2 (raw 000206c2)
(XEN) [00000066a11d8e1b] found SMP MP-table at 000fe710
(XEN) [00000066a13101f0] DMI 2.6 present.
(XEN) [00000066a13ff86a] Using APIC driver bigsmp
(XEN) [00000066a150836a] XSM Framework v1.0.0 initialized
(XEN) [00000066a1633e18] Initialising XSM SILO mode
(XEN) [00000066a175c2ed] ACPI: PM-Timer IO Port: 0x808 (32 bits)
(XEN) [00000066a18a649b] ACPI: SLEEP INFO: pm1x_cnt[1:804,1:0], pm1x_evt[1:800,1:0]
(XEN) [00000066a1998683] ACPI:             wakeup_vec[cf3b600c], vec_size[20]
(XEN) [00000066a1b6e009] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x20] enabled)
(XEN) [00000066a1ce6621] ACPI: LAPIC (acpi_id[0x02] lapic_id[0x00] enabled)
(XEN) [00000066a1e5e2ea] ACPI: LAPIC (acpi_id[0x03] lapic_id[0x22] enabled)
(XEN) [00000066a1fd7bd8] ACPI: LAPIC (acpi_id[0x04] lapic_id[0x02] enabled)
(XEN) [00000066a2153e58] ACPI: LAPIC (acpi_id[0x05] lapic_id[0x32] enabled)
(XEN) [00000066a22cc2e1] ACPI: LAPIC (acpi_id[0x06] lapic_id[0x12] enabled)
(XEN) [00000066a24445aa] ACPI: LAPIC (acpi_id[0x07] lapic_id[0x34] enabled)
(XEN) [00000066a25bc298] ACPI: LAPIC (acpi_id[0x08] lapic_id[0x14] enabled)
(XEN) [00000066a2734489] ACPI: LAPIC (acpi_id[0x09] lapic_id[0x21] enabled)
(XEN) [00000066a28ac4d8] ACPI: LAPIC (acpi_id[0x0a] lapic_id[0x01] enabled)
(XEN) [00000066a2a22b12] ACPI: LAPIC (acpi_id[0x0b] lapic_id[0x23] enabled)
(XEN) [00000066a2b990a1] ACPI: LAPIC (acpi_id[0x0c] lapic_id[0x03] enabled)
(XEN) [00000066a2d0f983] ACPI: LAPIC (acpi_id[0x0d] lapic_id[0x33] enabled)
(XEN) [00000066a2e86080] ACPI: LAPIC (acpi_id[0x0e] lapic_id[0x13] enabled)
(XEN) [00000066a2ffcb52] ACPI: LAPIC (acpi_id[0x0f] lapic_id[0x35] enabled)
(XEN) [00000066a317328c] ACPI: LAPIC (acpi_id[0x10] lapic_id[0x15] enabled)
(XEN) [00000066a3333892] ACPI: LAPIC_NMI (acpi_id[0xff] high edge lint[0x1])
(XEN) [00000066a34f1ee1] ACPI: IOAPIC (id[0x00] address[0xfec00000] gsi_base[0])
(XEN) [00000066a367e392] IOAPIC[0]: apic_id 0, version 32, address 0xfec00000, GSI 0-23
(XEN) [00000066a377ead2] ACPI: IOAPIC (id[0x01] address[0xfec80000] gsi_base[32])
(XEN) [00000066a3868f92] IOAPIC[1]: apic_id 1, version 32, address 0xfec80000, GSI 32-55
(XEN) [00000066a398ded8] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
(XEN) [00000066a3a783d2] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
(XEN) [00000066a3b9042a] Enabling APIC mode:  Phys.  Using 2 I/O APICs
(XEN) [00000066a3cf75cf] ACPI: HPET id: 0x8086a301 base: 0xfed00000
(XEN) [00000066a3e55883] PCI: MCFG configuration 0: base e0000000 segment 0000 buses 00 - ff
(XEN) [00000066a3f698d8] PCI: MCFG area at e0000000 reserved in E820
(XEN) [00000066a40c63e1] PCI: Using MCFG for segment 0000 bus 00-ff
(XEN) [00000066a42bcdf0] Xen ERST support is initialized.
(XEN) [00000066a442b9d2] HEST: Table parsing has been initialized
(XEN) [00000066a4577e6a] Using ACPI (MADT) for SMP configuration information
(XEN) [00000066a46f3ac0] SMP: Allowing 32 CPUs (16 hotplug CPUs)
(XEN) [00000066a4847367] IRQ limits: 56 GSI, 3032 MSI/MSI-X
(XEN) [00000066a49f0583] Disabling C-states C3 and C6 on Nehalem Processors due to errata
(XEN) [00000066a4b04ec0] CPU0: Intel machine check reporting enabled
(XEN) [00000066a4c69a52] Speculative mitigation facilities:
(XEN) [00000066a4d9f418]   Hardware features: IBRS/IBPB STIBP L1D_FLUSH SSBD
(XEN) [00000066a4f1ad12]   Compiled-in support: INDIRECT_THUNK SHADOW_PAGING
(XEN) [00000066a5096d00]   Xen settings: BTI-Thunk RETPOLINE, SPEC_CTRL: IBRS- SSBD-, Other: IBPB L1D_FLUSH BRANCH_HARDEN
(XEN) [00000066a5223ed8]   L1TF: believed vulnerable, maxphysaddr L1D 44, CPUID 40, Safe address 10000000000
(XEN) [00000066a74eb386]   Support for HVM VMs: MSR_SPEC_CTRL RSB EAGER_FPU
(XEN) [00000066a97c8192]   Support for PV VMs: MSR_SPEC_CTRL RSB EAGER_FPU
(XEN) [00000066abacc692]   XPTI (64-bit PV only): Dom0 enabled, DomU enabled (without PCID)
(XEN) [00000066aff509f0]   PV L1TF shadowing: Dom0 disabled, DomU enabled
(XEN) [00000066b22956d2] Using scheduler: SMP Credit Scheduler (credit)
(XEN) [00000066babf7c55] Platform timer is 14.318MHz HPET
(XEN) [    2.799022] Detected 2133.431 MHz processor.
(XEN) [    2.819484] alt table ffff82d08044ded0 -> ffff82d08045bf6a
(XEN) [    2.844328] [VT-D]Disabling Interrupt remapping due to Intel 5500/5520/X58 Chipset errata #47, #53
(XEN) [    2.878250] Intel VT-d iommu 0 supported page sizes: 4kB
(XEN) [    2.895549] Intel VT-d Snoop Control enabled.
(XEN) [    2.912720] Intel VT-d Dom0 DMA Passthrough not enabled.
(XEN) [    2.929925] Intel VT-d Queued Invalidation enabled.
(XEN) [    2.947045] Intel VT-d Interrupt Remapping not enabled.
(XEN) [    2.964151] Intel VT-d Posted Interrupt not enabled.
(XEN) [    2.981185] Intel VT-d Shared EPT tables not enabled.
(XEN) [    2.999892] I/O virtualisation enabled
(XEN) [    3.016721]  - Dom0 mode: Relaxed
(XEN) [    3.033382] Interrupt remapping disabled
(XEN) [    3.050016] Enabled directed EOI with ioapic_ack_old on!
(XEN) [    3.067164] ENABLING IO-APIC IRQs
(XEN) [    3.083517]  -> Using old ACK method
(XEN) [    3.100015] ..TIMER: vector=0xF0 apic1=0 pin1=2 apic2=-1 pin2=-1
(XEN) [    4.017084] Allocated console ring of 64 KiB.
(XEN) [    4.033455] mwait-idle: max C-state 1 reached
(XEN) [    4.049730] VMX: Supported advanced features:
(XEN) [    4.065894]  - APIC MMIO access virtualisation
(XEN) [    4.081971]  - APIC TPR shadow
(XEN) [    4.097892]  - Extended Page Tables (EPT)
(XEN) [    4.113777]  - Virtual-Processor Identifiers (VPID)
(XEN) [    4.129733]  - Virtual NMI
(XEN) [    4.145408]  - MSR direct-access bitmap
(XEN) [    4.161133]  - Unrestricted Guest
(XEN) [    4.176670] HVM: ASIDs enabled.
(XEN) [    4.192231] HVM: VMX enabled
(XEN) [    4.207504] HVM: Hardware Assisted Paging (HAP) detected
(XEN) [    4.222997] HVM: HAP page sizes: 4kB, 2MB, 1GB
(XEN) [    4.238985] alt table ffff82d08044ded0 -> ffff82d08045bf6a
(XEN) [    4.274806] mwait-idle: max C-state 1 reached
(XEN) [    4.310469] mwait-idle: max C-state 1 reached
(XEN) [    4.346093] mwait-idle: max C-state 1 reached
(XEN) [    4.381664] mwait-idle: max C-state 1 reached
(XEN) [    4.417176] mwait-idle: max C-state 1 reached
(XEN) [    4.452650] mwait-idle: max C-state 1 reached
(XEN) [    4.488078] mwait-idle: max C-state 1 reached
(XEN) [    4.523471] mwait-idle: max C-state 1 reached
(XEN) [    4.558737] mwait-idle: max C-state 1 reached
(XEN) [    4.593971] mwait-idle: max C-state 1 reached
(XEN) [    4.629141] mwait-idle: max C-state 1 reached
(XEN) [    4.664259] mwait-idle: max C-state 1 reached
(XEN) [    4.699519] mwait-idle: max C-state 1 reached
(XEN) [    4.734557] mwait-idle: max C-state 1 reached
(XEN) [    4.769482] mwait-idle: max C-state 1 reached
(XEN) [    4.783965] Brought up 16 CPUs
(XEN) [    4.799318] Testing NMI watchdog on all CPUs: ok
(XEN) [    4.891169] mcheck_poll: Machine check polling timer started.
(XEN) [    4.906677] mtrr: your CPUs had inconsistent variable MTRR settings
(XEN) [    4.922215] mtrr: probably your BIOS does not setup all CPUs.
(XEN) [    4.937775] mtrr: corrected configuration.
(XEN) [    4.953147] MTRR default type: uncachable
(XEN) [    4.968319] MTRR fixed ranges enabled:
(XEN) [    4.983506]   00000-9ffff write-back
(XEN) [    4.998000]   a0000-bffff uncachable
(XEN) [    5.011824]   c0000-cbfff write-protect
(XEN) [    5.025472]   cc000-d3fff write-back
(XEN) [    5.039186]   d4000-ebfff uncachable
(XEN) [    5.052690]   ec000-fffff write-protect
(XEN) [    5.066184] MTRR variable ranges enabled:
(XEN) [    5.079652]   0 base 0000000000 mask ff80000000 write-back
(XEN) [    5.093246]   1 base 0080000000 mask ffc0000000 write-back
(XEN) [    5.106857]   2 base 00c0000000 mask fff0000000 write-back
(XEN) [    5.120482]   3 base 0100000000 mask ff00000000 write-back
(XEN) [    5.134121]   4 base 0200000000 mask fe00000000 write-back
(XEN) [    5.147768]   5 base 0400000000 mask fc00000000 write-back
(XEN) [    5.161430]   6 base 0800000000 mask f800000000 write-back
(XEN) [    5.175114]   7 base 1000000000 mask ffc0000000 write-back
(XEN) [    5.188938]   8 disabled
(XEN) [    5.202472]   9 disabled
(XEN) [    5.215984] Dom0 has maximum 1016 PIRQs
(XEN) [    5.229487] csched_alloc_domdata: setting dom 0 as the privileged domain
(XEN) [    5.255990] NX (Execute Disable) protection active
(XEN) [    5.269672] *** Building a PV Dom0 ***
(XEN) [    5.617703]  Xen  kernel: 64-bit, lsb, compat32
(XEN) [    5.631320]  Dom0 kernel: 64-bit, PAE, lsb, paddr 0x1000000 -> 0x302c000
(XEN) [    5.658697] PHYSICAL MEMORY ARRANGEMENT:
(XEN) [    5.672353]  Dom0 alloc.:   0000000824000000->0000000828000000 (1080567 pages to be allocated)
(XEN) [    5.699919]  Init. ramdisk: 000000102ecf7000->000000102ffffc8f
(XEN) [    5.714253] VIRTUAL MEMORY ARRANGEMENT:
(XEN) [    5.728192]  Loaded kernel: ffffffff81000000->ffffffff8302c000
(XEN) [    5.742393]  Init. ramdisk: 0000000000000000->0000000000000000
(XEN) [    5.756711]  Phys-Mach map: 0000008000000000->0000008000868000
(XEN) [    5.771158]  Start info:    ffffffff8302c000->ffffffff8302c4b8
(XEN) [    5.785629]  Xenstore ring: 0000000000000000->0000000000000000
(XEN) [    5.800142]  Console ring:  0000000000000000->0000000000000000
(XEN) [    5.814903]  Page tables:   ffffffff8302d000->ffffffff8304a000
(XEN) [    5.830592]  Boot stack:    ffffffff8304a000->ffffffff8304b000
(XEN) [    5.846355]  TOTAL:         ffffffff80000000->ffffffff83400000
(XEN) [    5.861665]  ENTRY ADDRESS: ffffffff8242b180
(XEN) [    5.877761] Dom0 has maximum 16 VCPUs
(XEN) [    5.952376] Must not mask UR signaling on 0000:00:00.0
(XEN) [    5.967080] Found masked UR signaling on 0000:00:01.0
(XEN) [    5.981850] Found masked UR signaling on 0000:00:03.0
(XEN) [    5.996598] Found masked UR signaling on 0000:00:07.0
(XEN) [    6.011376] Found masked UR signaling on 0000:00:09.0
(XEN) [    6.026231] Found masked UR signaling on 0000:00:0a.0
(XEN) [    6.041135] Masked VT-d error signaling on 0000:00:14.0
(XEN) [   10.563228] Initial low memory virq threshold set at 0x4000 pages.
(XEN) [   10.578387] Scrubbing Free RAM in background
(XEN) [   10.593389] Std. Loglevel: Errors, warnings and info
(XEN) [   10.608715] Guest Loglevel: Nothing (Rate-limited: Errors and warnings)
(XEN) [   10.624570] ***************************************************
(XEN) [   10.639956] Booted on L1TF-vulnerable hardware with SMT/Hyperthreading
(XEN) [   10.655519] enabled.  Please assess your configuration and choose an
(XEN) [   10.670980] explicit 'smt=<bool>' setting.  See XSA-273.
(XEN) [   10.686456] ***************************************************
(XEN) [   10.701891] Booted on MLPDS/MFBDS-vulnerable hardware with SMT/Hyperthreading
(XEN) [   10.732031] enabled.  Mitigations will not be fully effective.  Please
(XEN) [   10.747802] choose an explicit smt=<bool> setting.  See XSA-297.
(XEN) [   10.763665] ***************************************************
(XEN) [   10.779625] 3... 2... 1...
(XEN) [   13.795757] Xen is relinquishing VGA console.
(XEN) [   13.906936] *** Serial input to DOM0 (type 'CTRL-a' three times to switch input)
(XEN) [   13.907211] Freed 600kB init memory
(XEN) [   19.846606] Must not mask UR signaling on 0000:00:00.0
(XEN) [   19.847180] Found masked UR signaling on 0000:00:01.0
(XEN) [   19.847759] Found masked UR signaling on 0000:00:03.0
(XEN) [   19.848356] Found masked UR signaling on 0000:00:07.0
(XEN) [   19.848952] Found masked UR signaling on 0000:00:09.0
(XEN) [   19.849535] Found masked UR signaling on 0000:00:0a.0
(XEN) [   19.850042] Masked VT-d error signaling on 0000:00:14.0
(XEN) [46146.555106] domain_crash called from vmx.c#vmx_update_guest_cr+0x516/0x6a0
(XEN) [46146.555109] Domain 9 (vcpu#1) crashed on cpu#4:
(XEN) [46146.555114] ----[ Xen-4.13.0-8.12.2  x86_64  debug=n   Not tainted ]----
(XEN) [46146.555116] CPU:    4
(XEN) [46146.555119] RIP:    0010:[<ffffffffc080d8f5>]
(XEN) [46146.555121] RFLAGS: 0000000000000002   CONTEXT: hvm guest (d9v1)
(XEN) [46146.555126] rax: 0000000000000020   rbx: 000000000175f000   rcx: 0000000080202001
(XEN) [46146.555128] rdx: 0000000006000000   rsi: 0000000000093df0   rdi: 0000000000000000
(XEN) [46146.555131] rbp: 0000000000100000   rsp: ffffb1e3c35c7c18   r8:  0000000000000000
(XEN) [46146.555133] r9:  0000000000000000   r10: 0000000000000000   r11: 0000000000000000
(XEN) [46146.555134] r12: 0000000000000000   r13: 0000000000000000   r14: 0000000000000000
(XEN) [46146.555137] r15: 0000000000000000   cr0: 0000000080050033   cr4: 0000000000002060
(XEN) [46146.555139] cr3: 000000010fe30006   cr2: 0000000000000000
(XEN) [46146.555140] fsb: 0000000000000000   gsb: 0000000000000000   gss: 0000000000000000
(XEN) [46146.555143] ds: 0018   es: 0018   fs: 0018   gs: 0018   ss: 0018   cs: 0010
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        • olivierlambertO
          olivierlambert Vates 🪐 Co-Founder🦸 CEO 🧑‍💼
          last edited by olivierlambert

          You should probably ask on Xen mailing list, there's a lot of Xen fluent people that might help 🙂

          edit: are you using GNS3 VM in nested mode?

          tsettleT 1 Reply Last reply Reply Quote 0
          • tsettleT
            tsettle @olivierlambert
            last edited by

            @olivierlambert

            Yeah, have nested mode enabled. It is an older CPU (L5630), but seems to work just fine with other hypervisors. I'm finding very little information other than the GNS and/or EVE-ng team wanting to blame Xen for poor nested virtualization support.

            I'm going to try again after I re-apply the 8.2 update. I really don't like posting without being up to date, but in this case, nested virtualization seems to be a fairly mature feature that hasn't changed much for a while.

            Then again, maybe I'll just try it on my production pool, which is running more modern processors.

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            • olivierlambertO
              olivierlambert Vates 🪐 Co-Founder🦸 CEO 🧑‍💼
              last edited by

              And what about disabled nested mode for the VM?

              tsettleT 1 Reply Last reply Reply Quote 0
              • tsettleT
                tsettle @olivierlambert
                last edited by tsettle

                @olivierlambert

                So I'll leave this here for posterity... while the pre-built VM images don't seem to want to work, building my own image using Debian 11 is working great so far.

                So, no problem with XCP-ng/Xen, just with the image built by the GNS3 team.

                Thanks for the responses Oliver, much appreciated.

                R 1 Reply Last reply Reply Quote 2
                • R
                  rjt @tsettle
                  last edited by

                  @tsettle Glad to hear this. I had tried getting GNS3 working for a long time but gave up and ran it under ProxMox. Is it still working? Do you mind sharing the guide you used? I have always thought it cool to havae a Xen Orchestra recipe / ansible build.

                  tsettleT 1 Reply Last reply Reply Quote 1
                  • tsettleT
                    tsettle @rjt
                    last edited by

                    @rjt It's been so long, I really don't remember any specifics. Other than following the GNS3 server installation docs on Debian 11 finally worked.

                    I've still not managed to get it to work with any of my 11th generation Dell servers. Pretty sure this comes down to CPU features. Fortunately, we're nearly done replacing all our 11th gen servers, so not a huge deal for us any more.

                    Home, however, is another story. I know 14th gen servers will work just fine for this, but they're still a little on the expensive side for the homelab, and I have no 12th or 13th gen servers to try on.

                    Good luck!

                    B 1 Reply Last reply Reply Quote 0
                    • B
                      Berrick @tsettle
                      last edited by

                      GNS3 VM 2.2.43 on XCP-ng 8.2 seems to be working for me on HP G8 running 2 x Intel(R) Xeon(R) CPU E5-2690 0 @ 2.90GHz.

                      I havent really used GNS3 much so probably havent found what might be broken other than I cant load xen tools.

                      I just imported the OVA via XOA and pointed the windows GNS3 at the IP address it picked up.

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