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Re: [Xen-devel] Bug Xen-4.4.0-RC6 with Hyper-V on Server 2012 R2.

Please refer the following link:



Also the following patch is missing if you want to boot VMware, Hyper-v on top of Xen:





NB: the screen flush has issue with hyper-v:  screen stuck but the VM still was running just like you mentioned that “Vm stuck on the first screen”.


Best regards,



From: xen-devel-bounces@xxxxxxxxxxxxx [mailto:xen-devel-bounces@xxxxxxxxxxxxx] On Behalf Of Valentin Meriel
Sent: Monday, March 03, 2014 5:48 AM
To: xen-devel@xxxxxxxxxxxxx
Subject: [Xen-devel] Bug Xen-4.4.0-RC6 with Hyper-V on Server 2012 R2.



I have a probleme with Xen-4.4.0-rc6.

I try to use Hyper-V on Xen 4.4.0, because of none sucess with KVM and Qemu.
I want to because i want to passthrough one (or more) VGA card to Hyper-V to test remoteFX (just for test if it work).

So on KVM-Qemu i can not install Hyper-V on Windows Server 2012 R2 because of an allready runnig Hypervisor.
On Xen i have the same "error" but if i add :
    hap = 1
    nestedhvm = 1
    cpuid = ['0x1:ecx=0xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx']
to my config file, i can install Hyper-V role, but when the VM restart it does not work, the Vm stuck on the first screen with the Windows logo.

To make the VM start again i have to comment out cpuid = ['0x1:ecx=0xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'] and after the VM can start, but when i whant
to start the L2 VM (the Hyper-V's VM) Hyper-V cant because one of this service is not started (or something like that).

Have you an idea ? Because in the wiki it's say it's work.

This is xl dmesg :

 Xen 4.4-rc
(XEN) Xen version 4.4-rc (root@) (gcc (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.1) debug=n Sun Mar  2 19:43:21 CET 2014
(XEN) Latest ChangeSet: Mon Feb 24 12:57:53 2014 +0000 git:5be1e95
(XEN) Bootloader: GRUB 2.00-19ubuntu2.1
(XEN) Command line: placeholder
(XEN) Video information:
(XEN)  VGA is text mode 80x25, font 8x16
(XEN)  VBE/DDC methods: V2; EDID transfer time: 1 seconds
(XEN) Disc information:
(XEN)  Found 2 MBR signatures
(XEN)  Found 2 EDD information structures
(XEN) Xen-e820 RAM map:
(XEN)  0000000000000000 - 000000000009dc00 (usable)
(XEN)  000000000009f800 - 00000000000a0000 (reserved)
(XEN)  00000000000f0000 - 0000000000100000 (reserved)
(XEN)  0000000000100000 - 00000000dfeb0000 (usable)
(XEN)  00000000dfeb0000 - 00000000dfee1000 (ACPI NVS)
(XEN)  00000000dfee1000 - 00000000dfef0000 (ACPI data)
(XEN)  00000000dfef0000 - 00000000dff00000 (reserved)
(XEN)  00000000f4000000 - 00000000f8000000 (reserved)
(XEN)  00000000fec00000 - 0000000100000000 (reserved)
(XEN)  0000000100000000 - 0000000320000000 (usable)
(XEN) ACPI: RSDP 000F7660, 0014 (r0 GBT   )
(XEN) ACPI: RSDT DFEE1040, 0048 (r1 GBT    GBTUACPI 42302E31 GBTU  1010101)
(XEN) ACPI: FACP DFEE1100, 0074 (r1 GBT    GBTUACPI 42302E31 GBTU  1010101)
(XEN) ACPI: DSDT DFEE11C0, 4F50 (r1 GBT    GBTUACPI     1000 MSFT  100000C)
(XEN) ACPI: FACS DFEB0000, 0040
(XEN) ACPI: MSDM DFEE6300, 0055 (r3 GBT    GBTUACPI 42302E31 GBTU  1010101)
(XEN) ACPI: HPET DFEE63C0, 0038 (r1 GBT    GBTUACPI 42302E31 GBTU       98)
(XEN) ACPI: MCFG DFEE6440, 003C (r1 GBT    GBTUACPI 42302E31 GBTU  1010101)
(XEN) ACPI: EUDS DFEE6500, 0470 (r1 GBT                    0             0)
(XEN) ACPI: TAMG DFEE6970, 0B3A (r1 GBT    GBT   B0 5455312E BG 53450101)
(XEN) ACPI: APIC DFEE6180, 012C (r1 GBT    GBTUACPI 42302E31 GBTU  1010101)
(XEN) ACPI: SSDT DFEE74C0, 2FD4 (r1  INTEL PPM RCM  80000001 INTL 20061109)
(XEN) ACPI: DMAR DFEEA4C0, 00B0 (r1 IntelR AWRDACPI 322E3030 DRWA        2)
(XEN) System RAM: 12286MB (12581172kB)
(XEN) Domain heap initialised
(XEN) Processor #0 7:10 APIC version 21
(XEN) Processor #2 7:10 APIC version 21
(XEN) Processor #4 7:10 APIC version 21
(XEN) Processor #6 7:10 APIC version 21
(XEN) Processor #1 7:10 APIC version 21
(XEN) Processor #3 7:10 APIC version 21
(XEN) Processor #5 7:10 APIC version 21
(XEN) Processor #7 7:10 APIC version 21
(XEN) IOAPIC[0]: apic_id 2, version 32, address 0xfec00000, GSI 0-23
(XEN) Enabling APIC mode:  Flat.  Using 1 I/O APICs
(XEN) Using scheduler: SMP Credit Scheduler (credit)
(XEN) Detected 2664.876 MHz processor.
(XEN) Initing memory sharing.
(XEN) Intel VT-d iommu 0 supported page sizes: 4kB.
(XEN) Intel VT-d iommu 1 supported page sizes: 4kB.
(XEN) Intel VT-d Snoop Control not enabled.
(XEN) Intel VT-d Dom0 DMA Passthrough not enabled.
(XEN) Intel VT-d Queued Invalidation enabled.
(XEN) Intel VT-d Interrupt Remapping enabled.
(XEN) Intel VT-d Shared EPT tables not enabled.
(XEN) [VT-D]iommu.c:2069: ioapic_to_iommu: ioapic 0 (id: 0x2) is NULL! Will not try to enable Interrupt Remapping.
(XEN) I/O virtualisation enabled
(XEN)  - Dom0 mode: Relaxed
(XEN) Interrupt remapping disabled
(XEN)  -> Using new ACK method
(XEN) Platform timer is 14.318MHz HPET
(XEN) Allocated console ring of 16 KiB.
(XEN) VMX: Supported advanced features:
(XEN)  - APIC MMIO access virtualisation
(XEN)  - APIC TPR shadow
(XEN)  - Extended Page Tables (EPT)
(XEN)  - Virtual-Processor Identifiers (VPID)
(XEN)  - Virtual NMI
(XEN)  - MSR direct-access bitmap
(XEN) HVM: ASIDs enabled.
(XEN) HVM: VMX enabled
(XEN) HVM: Hardware Assisted Paging (HAP) detected
(XEN) HVM: HAP page sizes: 4kB, 2MB
(XEN) Brought up 8 CPUs
(XEN)  Xen  kernel: 64-bit, lsb, compat32
(XEN)  Dom0 kernel: 64-bit, PAE, lsb, paddr 0x1000000 -> 0x23fa000
(XEN)  Dom0 alloc.:   000000030c000000->0000000310000000 (3041946 pages to be allocated)
(XEN)  Init. ramdisk: 000000031d13c000->000000031ffff800
(XEN)  Loaded kernel: ffffffff81000000->ffffffff823fa000
(XEN)  Init. ramdisk: ffffffff823fa000->ffffffff852bd800
(XEN)  Phys-Mach map: ffffffff852be000->ffffffff86a2aaf0
(XEN)  Start info:    ffffffff86a2b000->ffffffff86a2b4b4
(XEN)  Page tables:   ffffffff86a2c000->ffffffff86a65000
(XEN)  Boot stack:    ffffffff86a65000->ffffffff86a66000
(XEN)  TOTAL:         ffffffff80000000->ffffffff86c00000
(XEN)  ENTRY ADDRESS: ffffffff81d341e0
(XEN) Dom0 has maximum 8 VCPUs
(XEN) Scrubbing Free RAM: .done.
(XEN) Initial low memory virq threshold set at 0x4000 pages.
(XEN) Std. Loglevel: Errors and warnings
(XEN) Guest Loglevel: Nothing (Rate-limited: Errors and warnings)
(XEN) Xen is relinquishing VGA console.
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to Xen)
(XEN) Freed 280kB init memory.

This is xl info :

host                   : val-host-test
release                : 3.13.3-with-acs
version                : #1 SMP Mon Feb 17 23:02:44 CET 2014
machine                : x86_64
nr_cpus                : 8
max_cpu_id             : 15
nr_nodes               : 1
cores_per_socket       : 4
threads_per_core       : 2
cpu_mhz                : 2664
hw_caps                : bfebfbff:28100800:00000000:00003b00:0098e3bd:00000000:00000001:00000000
virt_caps              : hvm hvm_directio
total_memory           : 12286
free_memory            : 128
sharing_freed_memory   : 0
sharing_used_memory    : 0
outstanding_claims     : 0
free_cpus              : 0
xen_major              : 4
xen_minor              : 4
xen_extra              : -rc
xen_version            : 4.4-rc
xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64
xen_scheduler          : credit
xen_pagesize           : 4096
platform_params        : virt_start=0xffff800000000000
xen_changeset          : Mon Feb 24 12:57:53 2014 +0000 git:5be1e95
xen_commandline        : placeholder
cc_compiler            : gcc (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.1
cc_compile_by          : root
cc_compile_domain      :
cc_compile_date        : Sun Mar  2 19:43:21 CET 2014
xend_config_format     : 4

And this is my config file :

#kernel = 'hvmloader'
builder = 'hvm'
# Memory reserved for Windows domU, in this case 4GB (adjust to your needs):
memory = 4096
# Name of the domU:
name = 'Windows-Server-2012-R2'
# Most CPUs have 4 cores / 8 threads (=8 vcpus). Check your CPU and change as needed!:
vcpus = 1
# Only for 32 bit guests - don't use for 64 bit:
#pae = 1
acpi = 1
apic = 1
hap = 1
nestedhvm = 1
cpuid = ['0x1:ecx=0xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx']
nx = 1

# Here my virtual network interfaces - see /etc/network/interfaces below:
vif = [ 'mac=00:16:3e:68:e1:01,bridge=br0,model=e1000' ]
# I assigned a static MAC address, else it will be changed each time Windows
# boots. The address should start with 00:16:3e., the rest is up to you.
# Specifying the disks and Windows ISO for installation, adjust to your needs:
disk = [
        #,'file:/home/val/Partage/Windows-server-2012-R2-RTM-64 bits/fr_windows_server_2012_r2_x64_dvd.iso,hdc:cdrom,r'
# More disks can be added later using this same method. The path to the
# device or a file can be added. After the first comma is how the device will
# appear. "hda" is the first, "hdb" the second etc. "hda" will appear as IDE,
# sda will appear as SCSI or SATA. After the second comma "r" means read
# only and "w" is for write.
device_model_version = "qemu-xen-traditional"
boot = 'c'
# The above should be changed once Windows is installed: boot='c' to only
# show the Windows file system, else it may try to boot from the ISO image.
sdl = 0
vnc = 1
vnclisten = ''
vncpasswd = ''
keymap = 'fr'
stdvga = 0
# nographic=1 #!!! only uncomment this if you are using win8 or are trying
# to get a Nvidia card to work. In my case - Nvidia Quadro 2000 - this was not
# needed.
serial = 'pty'
tsc_mode = "default"
viridian = 1
#soundhw = 'all'
# This allows sharing the USB mouse/keyboard:
usb = 1
usbdevice = 'tablet'
# gfx_passthru=0 is how it works for most AMD cards and my Quadro 2000 card.
# gfx_passthru=1 would pass through the graphics card as primary display adapter.
# You can change this later for iGPUs or nVidia if needed.
# Try it with 0 first!
#gfx_passthru = 0
#Enter the PCI IDs you wish to passthru:
#pci = [ '02:00.0', '02:00.1' , '00:1a.0' ]
# The following lets Windows take the local time from the dom0:
localtime = 1
#To turn on pci power management globally, use (see remarks under pci=... below):
#pci_power_mgmt = 1

Thanks, and sorry for the my bad english, i'm french ^^.

Valentin Meriel.

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