Spectre & Meltdown
haskins.sophie at gmail.com
Thu Jan 4 14:54:31 CST 2018
>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 :(
On Thu, Jan 4, 2018 at 3:44 PM, jim stephens via cctalk <
cctalk at classiccmp.org> wrote:
> On 1/4/2018 12:34 PM, Ed Sharpe via cctalk wrote:
>> what about xenon processors??
>> In a message dated 1/4/2018 1:18:14 PM US Mountain Standard Time,
>> cctalk at 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.
>> ----- Original Message -----
>> From: "Warner Losh via cctalk" <cctalk at classiccmp.org>
>> To: "Murray McCullough" <c.murray.mccullough at gmail.com>; "General
>> Discussion: On-Topic and Off-Topic Posts" <cctalk at 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 at 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.
>>> 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
>>> are properly x86 :)
>> Finally, an excuse to use all those old 486 boxes...
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