BIOS Updates forum

The second page of this pdf file: http://www.intel.com/Assets/PDF/prodbrief/320665.pdf seems to indicate support for TXT in the Q43 chipset. The Dell site also mentions it with regard to the Optiplex 760: http://www.dell.com/content/products/productdetails.aspx/desktop-optiplex-760?c=us&cs=04&l=en&s...

Thanks for the info about rdmsr and wrmsr. I'm pretty sure I can't write a program to modify 0x3a since bit 0 is set, indicating that the register is locked by the BIOS (and can't be modified by software). Like you said, I'd like to find the code that modifies it in the BIOS and just change it there...

I forgot to add: SMX shows up as a flag in /proc/cpuinfo, and tboot also points out that the CPU is SMX capable when it is loading. Part of an example load: TBOOT: IA32_FEATURE_CONTROL_MSR: 0000000d TBOOT: CPU is SMX-capable TBOOT: ERR: SENTER disabled by feature control MSR (d) ... TBOOT: SMX not s...

Thank you for your reply. The Q43 chipset does support TXT - Intel has released an AC SINIT module for that chipset which I am attempting to load. I am trying to use tboot on my machine, which is why I need SMX enabled:

http://sourceforge.net/projects/tboot

Thanks!

-- BrokenString

I've been trying to enable Intel SMX (Safer Mode Extensions) on a Dell Optiplex 760 without any luck. There is no BIOS setting for this, and Dell was not able to assist me at all. The first thing I found out was that the IA32_FEATURE_CONTROL_MSR register controls this feature. The bits are as follow...