>From the exploit homepage (https://spectreattack.com/) , it seems like the Meltdown vulnerability affects all out-of-order executing Intel *branded* CPUs (from the P6 onward), and the Spectre vulnerability potentially impacts all superscalar processors of...all brands potentially :(
Sophie On Thu, Jan 4, 2018 at 3:44 PM, jim stephens via cctalk < cctalk@classiccmp.org> wrote: > > > On 1/4/2018 12:34 PM, Ed Sharpe via cctalk wrote: > >> what about xenon processors?? >> ed# >> In a message dated 1/4/2018 1:18:14 PM US Mountain Standard Time, >> cctalk@classiccmp.org writes: >> >> >> > There is no difference between them and any other intel x86 or x64 > processor as far as the flaw involved. > > Though they are not mentioning it, I suspect one can target P3 and P4 > equally well with the exploit. It has been around that long. > thanks > Jim > > >> ----- Original Message ----- >> From: "Warner Losh via cctalk" <cctalk@classiccmp.org> >> To: "Murray McCullough" <c.murray.mccullo...@gmail.com>; "General >> Discussion: On-Topic and Off-Topic Posts" <cctalk@classiccmp.org> >> Sent: Thursday, January 04, 2018 1:05 PM >> Subject: Re: Spectre & Meltdown >> >> >> On Thu, Jan 4, 2018 at 11:00 AM, Murray McCullough via cctalk < >>> cctalk@classiccmp.org> wrote: >>> >>> This may be off-topic but these latest uprocessor exploits has raised >>>> a question: Are the 'old/classic' uprocessors using x86 technology in >>>> the same boat? The very earliest ones, i.e., 1970s and early 80's. >>>> probably not. How many are actually in use and/or on the Net? >>>> >>>> I've seen it reported, but haven't verified, that this bug extends >>> about 20 >>> years back in the past to the Pentium Pro/Pentium II class of machines. >>> If >>> I read that correctly, there's only two generations of Pentium not >>> affected, the P54C and P55C, the former of F00F fame... 386 and 486 CPUs >>> apparently aren't affected since they didn't have speculative execution. >>> The 8088/8086/80186/80286 presumably are also immune... If you extend >>> things further back, CP/M on Z80/8080 is also fine, but I don't think >>> those >>> are properly x86 :) >>> >>> Warner >>> >> -------- >> Finally, an excuse to use all those old 486 boxes... >> >> m >> >> >> >
