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Date:      Tue, 15 Oct 2019 21:53:44 +0000
From:      Marcin Cieslak <saper@saper.info>
To:        Stefan Parvu <sparvu@kronometrix.org>
Cc:        freebsd-xen@freebsd.org
Subject:   Re: cannot install FreeBSD 12.0 Xen 4.12.1 on Intel Core i7 CPU 930
Message-ID:  <nycvar.OFS.7.76.44444.807.1910152152240.87688@z.fncre.vasb>
In-Reply-To: <DEEE41ED-5D88-439B-B583-7C3450C696FF@kronometrix.org>
References:  <DEEE41ED-5D88-439B-B583-7C3450C696FF@kronometrix.org>

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On Wed, 16 Oct 2019, Stefan Parvu wrote:

> Hi,
>
> I have a bit of problem, cannot install FreeBSD/Xen on a bit older hardware. The hardware
> should support the minimal VT-D/IOMMU settings, required by Xen.
>
> CPU: Intel(R) Core(TM) i7 CPU         930  @ 2.80GHz (2806.42-MHz K8-class CPU)
>  Origin="GenuineIntel"  Id=0x106a5  Family=0x6  Model=0x1a  Stepping=5
>  Features=0xbfebfbff<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,HTT,TM,PBE>
>  Features2=0x98e3bd<SSE3,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,SSE4.2,POPCNT>
>  AMD Features=0x28100800<SYSCALL,NX,RDTSCP,LM>
>  AMD Features2=0x1<LAHF>
>  VT-x: PAT,HLT,MTF,PAUSE,EPT,VPID
>  TSC: P-state invariant, performance statistics
>
> I get always a panic on CPU0 followed by a reboot. My /boot/loader.conf was set as:
>
> xen_cmdline="dom0_mem=2048M dom0_max_vcpus=4 dom0=pvh console=com1,vga com1=115200,8n1 guest_loglvl=all loglvl=all iommu=debug,forceā€

Does it happen in Xen or in FreeBSD dom0 kernel?

I have Xeon E3-1234 but I run 11.2-STABLE with xen-kernel-4.7.2_9 for a very long time already.
I also have:

hw.pci.mcfg=0
machdep.hyperthreading_allowed=0

Marcin
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