Re: VirtualBox: 64bit FreeBSD guest on 64bit FreeBSD host … "Long Mode"?

[Hub- FreeBSD]

I rebooted one of my other 64bit servers, same motherboard, and found that the Virtualization was disabled … unfortunately, my remote console for the server I'm trying this isn't working for the keyboard, so am going to need to get a local tech to fix this, but this seems like the cause … checking VBox.Log, I'm also finding:

pluto# grep VT VBox.log
00:00:00.281 HWACCM: No VT-x or AMD-V CPU extension found. Reason VERR_VMX_MSR_LOCKED_OR_DISABLED
pluto# 

Will get a tech to fix things up this week and re-test … 32bit works like a charm … like night-n-day going from QEMU to this though …


On 2011-10-02, at 6:53 AM, Alexander Eichner wrote:

> Hi,
> 
> the feature is called VMX and is present for your CPU. It is required to run 64bit guests. BIOS vendors disable
> this by default very often. A VBox.log will show if the BIOS disabled VT-x.
> 
> Regards,
> Alexander Eichner
> 
> Doug Barton wrote:
> 
> FWIW I have 64-bit guests working fine on my still-9-current (r225756)
> amd64 host with the latest ports vbox. I'm running it with the gui in X,
> not sure if that makes a difference.
> 
> On 10/01/2011 10:58, Hub- FreeBSD wrote:
> 
> > PAE:            on
> 
> I have PAE off for all hosts, but I just tried turning it on for my
> FreeBSD 64 bit guest and it didn't make a difference.
> 
> > Reading through the section on Hardware vs Software Virtualization,
> > apparently VT-X has to be enabled for 64bit guests
> 
> Yes, it will not work otherwise.
> 
> > … now, on the
> > server I'm using, looking at dmesg for ny CPU Features:
> > 
> > CPU: Intel(R) Xeon(R) CPU          E5420  @ 2.50GHz (2500.10-MHz
> > K8-class CPU) Origin = "GenuineIntel"  Id = 0x1067a  Family = 6
> > Model = 17  Stepping = 10 
> > 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=0x40ce3bd<SSE3,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,DCA,SSE4.1,XSAVE>
> > AMD Features=0x20100800<SYSCALL,NX,LM> AMD Features2=0x1<LAHF> TSC:
> > P-state invariant Cores per package: 4
> > 
> > 
> > I don't see VTX in there … *should* I? 
> 
> I don't think so, my equivalent lines are identical to yours except that
> I have and SMX in Features2 which seems to be a "safe mode" extension.
> 
> > Is this a case of, unbeknownst to me, it isn't enabled in the BIOS? 
> 
> This is (unfortunately) likely. The relevant stuff wasn't enabled in
> mine by default. Also, the name for the option may not be
> straightforward. On my Dell the option is called VMM, Virtual Machine
> Monitor. I had to do a bit of trial and error before I found the right
> knob.
> 
> > This is a remote
> > server, so a quick reboot / check isn't the easiest to do, so would
> > alike to confirm before I go down that route … can someone that does
> > have 64bit guests working check their CPU Features and let me know if
> > I am missing that Feature here? :(
> 
> 
> hth,
> 
> Doug
> 
> -- 
> 
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> 
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