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what are the ideal steps for running "invd" in SMP system?

Alam__Shariful
New Contributor I
‎03-12-2021 06:43 PM
1,824 Views

Hello,

I'm trying to run "invd" instruction on SMP system. I'm on Linux. I have a kernel module where I'm trying to run this "invd" instruction like the following,

asm ("wbinvd");
asm ("invd");

However, upon running the instruction I'm getting 

general protection fault: 0000 [#1] SMP PTI

I have also boot my kernel with no SMP support but the same error persists. This makes me think that maybe there are some other configurations that I need to setup before running this instruction. I was wondering if I can get some help regarding this, like what is the ideal setup for running "indv"     

 

Thank you 

~Shariful Alam

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Alam__Shariful
New Contributor I
‎03-13-2021 03:07 PM
1,765 Views

My SGX was enabled. By disabling it from the BIOS, I was able to run the "invd" instruction with no SMP support.  

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