Bug 239835

Summary: emulators/virtualbox-ose doesn't recognize AMD Ryzen 7 3800X "SVM" feature - won't allow 64-bit guests
Product: Ports & Packages Reporter: Jim D. <radicleparticles>
Component: Individual Port(s)Assignee: Virtualbox Team (Nobody) <vbox>
Status: New ---    
Severity: Affects Many People Keywords: needs-patch
Priority: --- Flags: bugzilla: maintainer-feedback? (vbox)
Version: Latest   
Hardware: amd64   
OS: Any   
Attachments:
Description Flags
Screen shot showing CPU type selections are now 32-bit only
none
VBox machine startup error message about no recognizable virtualization support
none
MSI MEG X570 ACE BIOS settings relevant to virtulization
none
Verification of MSI MB virtualization controls enabled
none
OS boot messages verifying AMD SVM enabled
none
Additional verification of SVM ("Intel Secure Ring") none

Description Jim D. 2019-08-14 01:17:39 UTC
Created attachment 206506 [details]
Screen shot showing CPU type selections are now 32-bit only

H/W: AMD Ryzen 7 3800X CPU, MSI MEG X570 ACE MB (no option to enable or disable virtualization)

Relevant DMESG line: 
AMDFeatures2=0x75c237ff<LAHF,CMP,SVM,ExtAPIC,CR8,ABM,SSE4A,MAS,Prefetch,OSVW,IBS,SKINIT,WDT,TCE,Topology,PCXC,PNXC,DBE,PL2I,MWAITX,

AMD Virtualization Reference:
https://en.wikipedia.org/wiki/X86_virtualization#AMD_virtualization_(AMD-V)

Relevant text:
'The CPU flag for AMD-V is "svm". This may be checked in BSD derivatives via dmesg or sysctl and in Linux via /proc/cpuinfo.'

Previously created 64-bit VBox machines on earlier H/W and VBox are no longer "defined" as 64-bit machines. All machine type selections are now 32-bit only (see 'FBSD-VBox-5.2.18_no_64_bit.png' screen shot).

Attempting to start a previously configured 64-bit VM now results in an error message (see 'FBSD-VBox-5.2.18_no_VTx_AMD-V_HW.png' screen shot) which further informs that CPU virtualization support is "missing".
Comment 1 Jim D. 2019-08-14 01:18:59 UTC
Created attachment 206507 [details]
VBox machine startup error message about no recognizable virtualization support
Comment 2 Jim D. 2019-08-14 01:20:41 UTC
Could not find any relevant documentation at VirtualBox.org about CPU virtualization support or detection.
Comment 3 Jim D. 2019-08-14 11:52:35 UTC
Created attachment 206523 [details]
MSI MEG X570 ACE BIOS settings relevant to virtulization

Two bits of information that I didn't have before:
a) AMD virtualization (AMD-V) is also referred to as "SVM"
b) MB virtualization settings are in Overclocking area which I skimmed over without making any changes upon initial system installation

Needed to enable IOMMU and SVM Mode
Comment 4 Jim D. 2019-08-14 11:54:39 UTC
Created attachment 206525 [details]
Verification of MSI MB virtualization controls enabled

Exiting from BIOS setup showing settings changes ("Global C-state" can be ignored)
Comment 5 Jim D. 2019-08-14 11:57:23 UTC
Created attachment 206526 [details]
OS boot messages verifying AMD SVM enabled

FBSD boot messages showing expanded list of AMD CPU features now including expanded SVM list.
Comment 6 Jim D. 2019-08-14 12:00:05 UTC
Created attachment 206528 [details]
Additional verification of SVM ("Intel Secure Ring")

More OS boot messages indicating active AMD SVM
Comment 7 Jim D. 2019-08-14 12:02:16 UTC
So, I now have AMD-V (SVM) enabled and VirtualBox-5.2.18 recognizes 64-bit VM. So this PR can be closed.
Comment 8 Jim D. 2019-08-14 12:04:17 UTC
VirtualBox Machine/Session Information now shows "VT-x/AMD-V" as Active.
Comment 9 Jim D. 2019-08-14 12:07:51 UTC
One last clue that pointed me in the right direction came from,

[Solved] No virtualization support with Gigabyte GA-AB350 Gaming 3?
https://forum.level1techs.com/t/solved-no-virtualization-support-with-gigabyte-ga-ab350-gaming-3/114171