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A comment on PCID is now a critical performance/security feature on x86. Parent comment

Re:PCID is now a critical performance/security feature on x86 by monocasa on Monday January 08, 2018 @03:14PM (#16099974)
It's not a RISC/CISC thing. They're called ASIDs in AMD land as well.
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Re:PCID is now a critical performance/security feature on x86 by bogomipz on Monday January 08, 2018 @05:16PM (#16101257)
I guess I am confused was to why there is both an ASID and PCID for x86 then?
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Re:PCID is now a critical performance/security feature on x86 by monocasa on Monday January 08, 2018 @05:54PM (#16101635)
They're Intel and AMD extensions respectively. They're tacked onto the virtualization extensions, and since every implementor (Xen, KVM, etc.) has just wrote separate backends for VT and SVM anyway, Intel and AMD haven't found the need to negotiate cross licensing.
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Re:PCID is now a critical performance/security feature on x86 by bogomipz on Tuesday January 09, 2018 @02:16AM (#16104230)
Thank you this makes sense. Cheers
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