All,

I'm trying to run a bhyve VM on a host that's already running Virtualbox, the problem I encounter is bhyve doesn't detect EPT capabilities but the Virtualbox logs indicate EPT is in use and functional. My question is; is it possible for two pieces of virtualization software to use EPT on the same host?

See below for the various logs, happy to provide more info if needed.


Bhyve generates the following error after the bootloader screen:

-----------------------------------------------------
Booting...
4 vCPUs requested but only 1 available
-----------------------------------------------------

A quick look in the source code indicates that this error means bhyve can't use EPT and falls back to using 1 CPU, now the machine in question does have EPT capabilites (it lists POPCNT in dmesg):

-----------------------------------------------------
uname -a
FreeBSD becks.debank.tv 10.0-CURRENT FreeBSD 10.0-CURRENT #0 r253788M: Tue Jul 30 12:02:57 NZST 2013 r...@becks.debank.tv:/usr/obj/usr/src/sys/GENERIC amd64
-----------------------------------------------------
-----------------------------------------------------
from dmesg
CPU: Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz (2664.82-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>
  TSC: P-state invariant, performance statistics
real memory  = 25769803776 (24576 MB)
avail memory = 24060841984 (22946 MB)
-----------------------------------------------------
-----------------------------------------------------
root@becks:~/bhyve # kldstat
Id Refs Address            Size     Name
 1   27 0xffffffff80200000 150e0d0  kernel
 2    1 0xffffffff8170f000 224a98   zfs.ko
 3    2 0xffffffff81934000 5c30     opensolaris.ko
 4    1 0xffffffff8193a000 2d40     coretemp.ko
 5    3 0xffffffff8193d000 51a68    vboxdrv.ko
 6    2 0xffffffff81a12000 28c0     vboxnetflt.ko
 7    2 0xffffffff81a15000 881d     netgraph.ko
 8    1 0xffffffff81a1e000 15ff     ng_ether.ko
 9    1 0xffffffff81a20000 3ec0     vboxnetadp.ko
10    1 0xffffffff81aba000 1037     cpuctl.ko
11    1 0xffffffff81abc000 1686ac   vmm.ko
-----------------------------------------------------

The Virtualbox logs below show EPT in use:
-----------------------------------------------------
00:00:00.419806 HWACCM: MSR_IA32_VMX_PROCBASED_CTLS2  = 7f00000000
00:00:00.419807 HWACCM:    VMX_VMCS_CTRL_PROC_EXEC2_VIRT_APIC
00:00:00.419807 HWACCM:    VMX_VMCS_CTRL_PROC_EXEC2_EPT
00:00:00.419808 HWACCM: VMX_VMCS_CTRL_PROC_EXEC2_DESCRIPTOR_INSTR_EXIT
00:00:00.419808 HWACCM:    VMX_VMCS_CTRL_PROC_EXEC2_RDTSCP
00:00:00.419809 HWACCM:    VMX_VMCS_CTRL_PROC_EXEC2_X2APIC
00:00:00.419809 HWACCM:    VMX_VMCS_CTRL_PROC_EXEC2_VPID
00:00:00.419810 HWACCM:    VMX_VMCS_CTRL_PROC_EXEC2_WBINVD_EXIT
---- snip ------
00:00:00.419916 HWACCM: 32-bit and 64-bit guests supported.
00:00:00.419917 HWACCM: VMX enabled!
00:00:00.419918 HWACCM: Enabled nested paging
00:00:00.419919 HWACCM: EPT root page                 = 00000000b6167000
00:00:00.419922 HWACCM: Large page support enabled!
-----------------------------------------------------

Thanks,
Rob Evers

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