ASRock B550 Phantom Gaming and AMD SME |
Post Reply |
Author | ||||
smeyes
Newbie Joined: 24 Oct 2021 Status: Offline Points: 35 |
Post Options
Thanks(0)
Posted: 24 Oct 2021 at 5:03am |
|||
Using
ASRock B550 Phantom Gaming-ITX/ax, BIOS P2.20 08/05/2021 with AMD Ryzen 7 PRO 5750GE with Radeon Graphics (100-000000257) which have support for AMD Secure Encryption feature called "SME". To use "SME" at OS level is must be enabled before OS start, hence it cannot be enabled in BIOS yet. Verification of my statement: 1) CPU in question support "SME" at hardware level
2) but "SME" support is not enabled sadly verified by bit 23 (MSR_AMD64_SYSCFG_MEM_ENCRYPT) of MSR 0xC0010010 (MSR_AMD64_SYSCFG)
double check value
It should be value 0xf40000
Also toggling Transparent Secure Memory Encryption (TSME) Feature at BIOS>Advanced tab>AMD CBS>UMC Common Options (DDR4 Common Options)>Security does not help. Please provide a BIOS option for enabling SME Feature or enlight me how to enable SME feature flag by current BIOS menu. |
||||
ASRock_TSD
ASRock_Official Joined: 20 Mar 2015 Status: Offline Points: 8532 |
Post Options
Thanks(0)
|
|||
Dear smeyes,
Thank you for the posting. If you are using Linux OS, this behavior may be normal. Recently, the Linux 5.15 kernel disabled the SME for fixing some problem. You can refer to the article from following link for further information. AMD Secure Memory Encryption Has a Flaw, Now Disabled by Default in Linux Kernel: https://www.tomshardware.com/news/amd-memory-encryption-disabled-in-linux Thank you, Best wishes, ASRock TSD |
||||
smeyes
Newbie Joined: 24 Oct 2021 Status: Offline Points: 35 |
Post Options
Thanks(0)
|
|||
Hi,
any news? We are still unable to enable AMD SME at BIOS to get it activate at Linux kernel. However, if BIOS does not enable SME, then Linux will not be able to activate memory encryption,... |
||||
Post Reply | |
Tweet
|
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |