[HowTo] Install pfSense 2.1 RC0 amd64 on Xen 4.3 as PV HVM

A Former User

I also just switched the active LAN device to the re0 one.. it appears to work:

re0: flags=8843 <up,broadcast,running,simplex,multicast>metric 0 mtu 1500
options=9b <rxcsum,txcsum,vlan_mtu,vlan_hwtagging,vlan_hwcsum>ether 00:16:3e:14:01:97
inet 192.168.0.10 netmask 0xffffff00 broadcast 192.168.0.255
inet6 fe80::216:3eff:fe14:197%re0 prefixlen 64 scopeid 0x1
nd6 options=1 <performnud>media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
xn0: flags=8802 <broadcast,simplex,multicast>metric 0 mtu 1500
options=503 <rxcsum,txcsum,tso4,lro>ether 00:16:3e:14:01:97
media: Ethernet manual
status: active

Definitely time to try rebuilding my kernel and see how it goes :)</rxcsum,txcsum,tso4,lro></broadcast,simplex,multicast></full-duplex></performnud></rxcsum,txcsum,vlan_mtu,vlan_hwtagging,vlan_hwcsum></up,broadcast,running,simplex,multicast>

A Former User

@Sabrewarrior:

Hello Ren22, theres a difference between PVHVM and PV. I haven't tried to make a pure i386 PV pfSense. I can upload an amd64 PVHVM iso of the 2.1 Release later on today though.

Hi Sabrewarrior - any chance you could upload the PVHVM amd64 image? And ideally, the contents of your "conf/kernels" directory?

I built the i386 32-bit pfSense iso ok and it boots PVHVM, but as noted it has both the re0 and xn0 interfaces - I checked a vanilla XENHVM freeBSD8.3 kernel and it has the same symptoms and appears to be a bug in the 32-bit HVM code, so I decided to have a go at a 64-bit kernel seeing as how you've had success at it.

I built a vanilla amd64 freeBSD8.3 kernel, and it works just fine without duplicate network interfaces, so I figured a pfSense kernel should be easy. However, I'm getting a Fatal trap 12 error booting the pfSense XENHVM kernel - which means there has to be an issue in the pfSense code somewhere, unless there's something I'm missing in the options/devices.

If you could post/upload your amd64 PVHVM iso for me to try, it'll at least give me an indication whether the issue is my build process, or whether it doesn't like my hardware combo (Supermicro X8SIL and Xeon X3450 cpu).

Any help appreciated - its getting frustrating after about 8 iso builds in the last 24 hours!

Sabrewarrior

Hello xlot,
Sorry for the delay. I am honestly at a loss to explain the 2 interfaces since brctl is only showing 1 interface being shared, assuming vif1.0 is for a different DomU. Also both your interfaces seem to have the same mac address which is a very bad thing and might be the cause of your high latency.

As promised I have uploaded the amd64 PVHVM image to my blog which is in my signature (don't worry no ads!). I have attached the config file I used here though. My sever is running AMD not Intel. I have not tested this image so let me know how it works. I will be working on a 32 bit PV image now.

pfSense_SMP.8.txt

A Former User

Many thanks! The dual-interface problem appears to be something to do with the xenpci driver for the i386 platform.

As suspected, your kernel conf file is identical to one of the variations I've tried (note - the same outcome can be achieved by just replacing the import statement to use the "XENHVM" bsd kernel conf instead of "GENERIC" - saves adding the extra lines).

I just downloaded your image and will have a try and report back here. Thanks for your help - using a known-good build will tell me whether the problem lies with my hardware combo, or possibly dom0 (I'm suddenly wondering as I type this whether I should try the old xm toolset using xend, instead of the newer xl/xenstored one).

A Former User

Ok, your image gives the same error I've been getting on the 64-bit platform. The trace shows that its the same problem as found here:

http://lists.freebsd.org/pipermail/freebsd-xen/2013-June/001613.html which in turn links to this post that includes a patch:

http://lists.freebsd.org/pipermail/freebsd-xen/2012-September/001359.html

Here's my trace. Its the same issue and looks like it might be a problem with xenstored on my dom0 (xen-4.2.3 on kernel 3.4.61 - stock centos packages).


Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0xffffff010294c2ef
fault code              = supervisor write data, page not present
instruction pointer     = 0x20:0xffffffff80a56a68
stack pointer           = 0x28:0xffffffff816b19f0
frame pointer           = 0x28:0xffffffff816b1a30
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = trace trap, interrupt enabled, resume, IOPL = 0
current process         = 0 (swapper)

A Former User

I just posted to the Development section - patching the xenstore.c file with the fix found on the freebsd-xen mailing list has worked and I've got a pfSense VM running using the Xen-native block device drivers (xn0 and xbd0).

Info here:

http://forum.pfsense.org/index.php/topic,69546.0.html

Thanks for your help sabrewarrior.

Incidentally, it seems that there's a problem with my pci-passthrough of an Intel Corporation 82574L NIC - I was getting irq errors and the interface wasn't working, but that was fixed by forcing use of MSI interrupts rather than MSIX, by adding these lines to loader.conf:


hw.pci.enable_msi=1
hw.pci.enable_msix=0

So finally, I've got it all working as wanted, and I can start to actually test the new setup.. woohoo!

Sabrewarrior

Yeah, I am using ubuntu with xen 4.3 so that might be one of the patches that fixes your problem. I get irq errors with my vr interface, I wonder if its a related problem to MSI interrupts.

Sabrewarrior

Well never thought that I could make a pure PV work but after some ridiculous amount of time spent, I have managed to get a working pfSense i386 PV iso. I am gonna make another one with a bit more clean up to make it straightforward and documentation so I can post the how to.

Issues so far:
SMP is broken. If you use more than 1 vcpu it will not work. Issue is with FreeBSD Xen drivers again. First function that gives an error can be found in src under sys/xen/interface/xen.h at line 80: #define __HYPERVISOR_vcpu_op 24

It gives the following panic at vcpu=2:
SMP: Added CPU 0 (BSP)
SMP: Added CPU 1 (AP)
gdtpfn=83ec38 pdptpfn=89c17
panic: HYPERVISOR_vcpu_op(VCPUOP_initialise, cpu, &ctxt): /usr/pfSensesrc/src/sys/i386/xen/mp_machdep.c:930
cpuid = 0
KDB: enter: panic

A Former User

I posted some info before in another thread here:

http://forum.pfsense.org/index.php/topic,67866.msg375470.html#msg375470

The problems with pure-PV on freeBSD are described here on a post from the freebsd-xen list:

http://freebsd.1045724.n5.nabble.com/Paravirt-domU-and-PCI-Passthrough-td5858307.html

IIRC, there's also a memory limit for PV on i386 - various old posts on the freebsd-xen list mentioned somewhere around 700 megs.

I've been running pfSense as my gateway for a week for one small subnet - and working through reading docs.. PVHVM is seeming workable (I need PCI passthrough - I prefer to run the pfSense VM with a separate physical NIC/subnet for the external interface.

archedraft

Would you mind posting the contents of you pfsense.cfg file?