Bug 239835 - emulators/virtualbox-ose doesn't recognize AMD Ryzen 7 3800X "SVM" feature - won't allow 64-bit guests
Summary: emulators/virtualbox-ose doesn't recognize AMD Ryzen 7 3800X "SVM" feature - ...
Status: New
Alias: None
Product: Ports & Packages
Classification: Unclassified
Component: Individual Port(s) (show other bugs)
Version: Latest
Hardware: amd64 Any
: --- Affects Many People
Assignee: vbox
URL:
Keywords: needs-patch
Depends on:
Blocks:
 
Reported: 2019-08-14 01:17 UTC by Jim D.
Modified: 2019-08-14 12:07 UTC (History)
0 users

See Also:
bugzilla: maintainer-feedback? (vbox)


Attachments
Screen shot showing CPU type selections are now 32-bit only (73.88 KB, image/png)
2019-08-14 01:17 UTC, Jim D.
no flags Details
VBox machine startup error message about no recognizable virtualization support (18.58 KB, image/png)
2019-08-14 01:18 UTC, Jim D.
no flags Details
MSI MEG X570 ACE BIOS settings relevant to virtulization (58.40 KB, image/jpeg)
2019-08-14 11:52 UTC, Jim D.
no flags Details
Verification of MSI MB virtualization controls enabled (50.72 KB, image/jpeg)
2019-08-14 11:54 UTC, Jim D.
no flags Details
OS boot messages verifying AMD SVM enabled (367.11 KB, image/jpeg)
2019-08-14 11:57 UTC, Jim D.
no flags Details
Additional verification of SVM ("Intel Secure Ring") (90.88 KB, image/jpeg)
2019-08-14 12:00 UTC, Jim D.
no flags Details

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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