VirtualBox on FreeBSD host and Windows8 guest
Bernhard Fröhlich
decke at FreeBSD.org
Fri Aug 24 13:53:55 UTC 2012
On Fri, Aug 24, 2012 at 3:19 PM, Guido van Rooij <guido at gvr.org> wrote:
> On Fri, Aug 24, 2012 at 03:10:22PM +0200, Bernhard Fröhlich wrote:
>> On Fri, Aug 24, 2012 at 1:32 PM, Guido van Rooij <guido at freebsd.org> wrote:
>> > Hi,
>> >
>> > I am trying to install Windows 8 in Virtualbox on a 32-bit FBSD host.
>> > (FreebSD 8.3 and VB 4.1.18).
>> >
>> > Windows refuses to install and this is due to NX not being present (it
>> > is enabled in the virtual machine settings). NX is also enabled in my
>> > bios as can be seen in the boot log of the FreeBSD host:
>> > CPU: Intel(R) Core(TM)2 Duo CPU P9700 @ 2.80GHz (2793.02-MHz 686-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=0x408e3fd<SSE3,DTES64,MON,DS_CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,XSAVE>
>> > AMD Features=0x20100000<NX,LM>
>> > AMD Features2=0x1<LAHF>
>> > TSC: P-state invariant
>> >
>> > When I create a new virtual machine with the xact same settings as the W8 host,
>> > and boot a FreeSBD installation CD, I see that none of the AMD features are
>> > exposed to the guest os:
>> > CPU: Intel(R) Core(TM)2 Duo CPU P9700 @ 2.80GHz (2883.13-MHz 686-class CPU)
>> > Origin = "GenuineIntel" Id = 0x1067a Family = 6 Model = 17 Stepping = 10
>> > Features=0x783fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE,SSE2>
>> > Features2=0x209<SSE3,MON,SSSE3>
>> > TSC: P-state invariant
>> >
>> > Is this just not supported, or is there a secret setting?
>>
>> There are knobs in the processor tab in the GUI for that.
>>
>
> Enable PAE/NX is set.
> Vt-x/AMD-V is set
> Nesting paging is set.
>
> So the knowbs are set correctly, yet no NX.
Have a look at your VBox.log and check what it says.
--
Bernhard Froehlich
http://www.bluelife.at/
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