Windows 10 VM crashes (N5105)

[GoogleSitemaps]

A migrated VM is crashing my new hardware. If I do a clean install and run certain progammes (BlueIris) it crashes the VM. I think it is happening when software on the OS is probing for certain capabilities.

This issue from a few years back looks similar to the one I'm facing :
https://xcp-ng.org/forum/topic/3517/windows-10-vm-reboots-when-starting-software/18

which makes me think it is perhaps specific to my more recent CPU / hardware.
I'm using an N5105 processor.

(XEN) [526158.312732] d11v1 Unknown Host LBR MSRs
(XEN) [526158.312738] domain_crash called from arch/x86/hvm/vmx/vmx.c#vmx_msr_write_intercept+0x4c2/0x510
(XEN) [526158.312740] Domain 11 (vcpu#1) crashed on cpu#0:
(XEN) [526158.312745] ----[ Xen-4.13.4-9.24.1  x86_64  debug=n   Tainted: M    ]----
(XEN) [526158.312746] CPU:    0
(XEN) [526158.312748] RIP:    0010:[<fffff80631bf8ad2>]
(XEN) [526158.312749] RFLAGS: 0000000000040002   CONTEXT: hvm guest (d11v1)
(XEN) [526158.312752] rax: 0000000000000001   rbx: 0000000000000000   rcx: 00000000000001d9
(XEN) [526158.312753] rdx: 0000000000000000   rsi: 0000000000000000   rdi: 0000000000000280
(XEN) [526158.312755] rbp: ffffd5854226fc80   rsp: ffffd5854226fbf8   r8:  0000000000000001
(XEN) [526158.312757] r9:  ffffd5854226f358   r10: 0000000000000000   r11: ffff958afc6b1080
(XEN) [526158.312758] r12: 00000000018cb4e0   r13: 00007ffd01d34960   r14: 0000000000000280
(XEN) [526158.312760] r15: 0000000000000000   cr0: 0000000080050033   cr4: 0000000000350ef8
(XEN) [526158.312761] cr3: 000000002eefc000   cr2: 00000000003d125a
(XEN) [526158.312762] fsb: 0000000000000000   gsb: ffffa901f09d2000   gss: 00000000003c6000
(XEN) [526158.312764] ds: 002b   es: 002b   fs: 0053   gs: 002b   ss: 0018   cs: 0010

any thoughts?

[olivierlambert]

Hi,

Without more information, it's hard to assist… What XCP-ng version are you using? Is it fully up to date? Are you using nested mode?

[GoogleSitemaps]

@olivierlambert xo-server 5.102.0 patched. Not nested.

[olivierlambert]

XCP-ng, not Xen Orchestra

[GoogleSitemaps]

@olivierlambert XCP-ng Host 8.2.1

[olivierlambert]

Do you have BIOS access? I would double check you have various options enabled (I don't remember exactly which ones, also this bug rings a bell but I can't find exactly what )

[GoogleSitemaps]

@olivierlambert I'll have a run through the bios shortly. I recall enabling all the virtualization settings etc. everything else seems to be running smoothly.

my hunch is it is graphics related and BlueIris is probing for graphic accelerator hardware. I cant find a way to disable this behavior to test my theory though.

Something similar was reported on proxmox, the solution was to set the following option, but I don't see an equivalent. For XCP-NG.

echo "options kvm ignore_msrs=1" > /etc/modprobe.d/kvm.conf

[olivierlambert]

It's weird since we patched those recents CPUs for this bug: https://github.com/xcp-ng/xcp/issues/434

Could it be something else?

olivierlambert created this issue in xcp-ng/xcp

closed Backport Xen patch to support Ice Lake and Comet Lake CPUs #434

[GoogleSitemaps]

@olivierlambert okay, I just remembered, I had trouble installing too ..... The install was black screening after relinquish VGA.

After some reading around I happened upon :

"Custom XCP-ng 8.2.1 install ISO with Xen 64bit VGA Dom0 kernel fix (NUC11) and new ethernet drivers (NUC10/NUC11):" from here :

https://users.ntplx.net/~andrew/xcp/

This is how I got up and running.

I'm way out of my depth here, but this feels like it might be the crux of the matter.

[olivierlambert]

Can you create an issue on https://github.com/xcp-ng/xcp?

[GoogleSitemaps]

@olivierlambert sure , will give it a go.

[GoogleSitemaps]

@GoogleSitemaps

https://github.com/xcp-ng/xcp/issues/565

danielbayley80 created this issue in xcp-ng/xcp

open Domain 11 (vcpu#1) crashed on cpu#0: (N5105) #565