4 ms·
Do you think this could be within the rather new Intel AVX 512 ISA or older intel CPUs like Sandy Bridge (first AVX chip) could also suffer? - edit - I checked
by acoye 9y ago
Do you think this could be within the rather new Intel AVX 512 ISA or older intel CPUs like Sandy Bridge (first AVX chip) could also suffer?
- edit - I checked Ryzen ISA, they support AVX2. So probably AVX512 is the issue.
- rphlx 9y agoIt has nothing to do with AVX AFAICT. They are going to set X86_BUG_CPU_INSECURE [1] on all public Intel CPUs, including old ones that lack AVX (Core2, etc). [1] I do hope they rename that flag to something like X86_BUG_NEEDS_PTI as the current name is bloody abysmal: way too broad and ambiguous, as if this is the only insecurity that ever has or ever will impact x86.
- wilun 9y agoWell that very name hints that it is probably a very annoying bug, with an impact way more annoying that a simple ASLR address leak or data access trace (hell, Intel does not even consider side-channel data access / tlb tracing to SGX a vuln, so this has to be better than that kind of issues...)
- fulafel 9y agoEverything so far hints at a microarchitecture bug, not a ISA specific.