Each processor has its own EPT root pointer in VMCS. How many processors
are there in system and how many are given to Virtualbox.

                error = vmcs_set_defaults(&vmx->vmcs[i],
                                          (u_long)vmx_longjmp,
                                          (u_long)&vmx->ctx[i],
                                          vtophys(vmx->pml4ept),
                                          pinbased_ctls,
                                          procbased_ctls,
                                          procbased_ctls2,
                                          exit_ctls, entry_ctls,
                                          vtophys(vmx->msr_bitmap),
                                          vpid);


On Tue, Aug 6, 2013 at 3:02 PM, <mailingli...@debank.tv> wrote:

> 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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