Asrock X58 SuperComputer anti-spectre microcode and vt-d upgrade

[DeathBringer]

Try to flash my mod and make new screenshot of regedit with expanded key HKEY_LOCAL_MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 with disabled VT-d.
Then try to enable it.

[Ranmamez]

What modification have you done? And how?
I can't even find the AMIPCB to edit the bios myself...

[DeathBringer]

https://www.delidded.com/how-to-update-c...-ami-bios/
I've updated microcode only.

[Ranmamez]

Thank you.
So you upgraded just the microcode.
Where did you get it?
Anyway I'm going to try it now.

[Ranmamez]

Ok, about Spectre fix: success!
I downloaded and launched InSpectre release #8 utility/tool and with the original Bios the button "Enable Spectre Protection" was greyed out so unavailable, with your bios was available, I clicked on it, rebooted and this are the results (also checked with SpectreMeltdownCheck), also checked under Windows 10.

About vt-d with Windows 10, no success, it gets stuck at the windows blu logo bootscreen if vt-d is enabled...
We should figure out where the fix is located in the Asus Sabertooth X58 BIOS and dump it, to add to the Asrock Bios...

[Ranmamez]

Geez, I just found that there were already patched bioses for my motherboard: http://forum.asrock.com/forum_posts.asp?TID=9239&title=spectre-patched-bios-for-asrock-x58-motherboards
Thank you very much anyway for your effort...

[Ranmamez]

So, there's no hope to get the vt-d fix on the bios?

[DeathBringer]

So, there's no hope to get the vt-d fix on the bios?

The search for a reason is very complicated.

[Ranmamez]

Hi.
I found that the x58 chipset had issues with the VT-D enabled, when used with some virtualization software under linux or other unix based OS.
The problem seems to lie in a broken RMRR or DMAR table (that I don't know what is it, apart of being some address translation table).
So I thought that maybe it is the same issue that make Windows 10 64b 1803 and later freeze at booting if the vt-d is enabled.
I found that there is this thread but also this other one where it seems that TheWiz fixed the issue for that pre-built computer.
So I wanted to ask if he could do the magic again for other X58 motherboards, or at least show us what he did at that time and what software/tools he used to achieve that goal.
Anyway my latest bios, also spectre/meltdown patched, is here: http://www.mediafire.com/file/wke9sob2l3...D.zip/file
Thank in advance.