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Search found 64 matches

by calinb
Sun Jan 14, 2018 3:27 pm
Forum: General
Topic: Script to check for Meltdown and/or Spectre vulnerability
Replies: 31
Views: 912

Architecture FYI, in case anyone's interested.

Raspberry Pi Founder's brief introduction to the CPU concepts and architectures that make Meltdown and Spectre possible:

https://www.raspberrypi.org/blog/why-raspberry-pi-isnt-vulnerable-to-spectre-or-meltdown/
by calinb
Sat Jan 13, 2018 11:09 pm
Forum: General
Topic: Script to check for Meltdown and/or Spectre vulnerability
Replies: 31
Views: 912

Re: Script to check for Meltdown and/or Spectre vulnerability

Downloaded from github and my ... old Atom (manufactured in 2011) running MX-16 PAE or Liquorix are "vulnerable" through and through. I'd read that Atom CPUs more than 5 years old are not vulnerable, but there's a lot of misinformation out there about S&M or maybe the script doesn't c...
by calinb
Sat Jan 13, 2018 4:13 pm
Forum: General
Topic: Script to check for Meltdown and/or Spectre vulnerability
Replies: 31
Views: 912

Re: Script to check for Meltdown and/or Spectre vulnerability

Yes--I suspect that you may have already stumbled upon this page, timkb4cq: https://tenfourfox.blogspot.com/2018/01/more-about-spectre-and-powerpc-or-why.html Nope, missed that one. I just searched for info about 7447a speculative instructions & wound up here: https://www.nxp.com/docs/en/applic...
by calinb
Sat Jan 13, 2018 1:48 am
Forum: General
Topic: Script to check for Meltdown and/or Spectre vulnerability
Replies: 31
Views: 912

Re: Script to check for Meltdown and/or Spectre vulnerability

<snip> I think it is very difficult to adapt the KPTI patches to 32-bit, otherwise the fixes would have been pushed to Ubuntu and Debian already. It's not just a matter of adding PROCESS_TABLE_ISOLATION=y to the 32-bit configuration. Thanks again, Stevo. That is really a bummer, because sometimes I...
by calinb
Sat Jan 13, 2018 1:43 am
Forum: General
Topic: Script to check for Meltdown and/or Spectre vulnerability
Replies: 31
Views: 912

Re: Script to check for Meltdown and/or Spectre vulnerability

Looking at the 7447a's functional schematic and explanation, it's probably pretty safe. It does do some speculative branching, but only puts one instruction after each of the (up to 4) predicted branch targets on the queue. That would leave little footprint to leak compared to an i7 which will spec...
by calinb
Sat Jan 13, 2018 1:30 am
Forum: General
Topic: Script to check for Meltdown and/or Spectre vulnerability
Replies: 31
Views: 912

Re: Script to check for Meltdown and/or Spectre vulnerability

Downloaded from github and my ... old Atom (manufactured in 2011) running MX-16 PAE or Liquorix are "vulnerable" through and through. I'd read that Atom CPUs more than 5 years old are not vulnerable, but there's a lot of misinformation out there about S&M or maybe the script doesn't c...
by calinb
Fri Jan 12, 2018 6:22 pm
Forum: General
Topic: Script to check for Meltdown and/or Spectre vulnerability
Replies: 31
Views: 912

Re: Script to check for Meltdown and/or Spectre vulnerability

The changes in the kernels to mitigate Meltdown are currently only for 64-bit. It's hard to find any explanation online as to why this situation happened, though. O̶n̶e̶ ̶A̶r̶c̶h̶ ̶u̶s̶e̶r̶ ̶r̶e̶p̶o̶r̶t̶s̶ ̶t̶h̶a̶t̶ ̶h̶i̶s̶ ̶3̶2̶-̶b̶i̶t̶ ̶k̶e̶r̶n̶e̶l̶ ̶h̶a̶s̶ ̶K̶P̶T̶I̶ ̶m̶i̶t̶i̶g̶a̶t̶i̶o̶n̶ ̶w̶o̶r̶...
by calinb
Fri Jan 12, 2018 5:18 pm
Forum: General
Topic: Script to check for Meltdown and/or Spectre vulnerability
Replies: 31
Views: 912

Re: Script to check for Meltdown and/or Spectre vulnerability

Downloaded from github and my new Intel mobile quad core Pentium running MX-17 and old Atom (manufactured in 2011) running MX-16 PAE or Liquorix are "vulnerable" through and through. I'd read that Atom CPUs more than 5 years old are not vulnerable, but there's a lot of misinformation out t...
by calinb
Mon Jan 08, 2018 3:25 pm
Forum: MX Help
Topic: Canon LiDE 50 scanner support in MX-15
Replies: 42
Views: 4930

Re: Canon LiDE 50 scanner support in MX-15

1) The Mepis Wiki is still where it always was: http://www.mepis.org/docs/en/index.php?title=Main_Page. I moved over its scanner contents to the MX Wiki ( Scanners ) a couple of years ago, updating and deleting to the extent possible without actually owning a Canon scanner to test.The link for driv...
by calinb
Mon Jan 08, 2018 2:13 am
Forum: MX Help
Topic: Canon LiDE 50 scanner support in MX-15
Replies: 42
Views: 4930

Re: Canon LiDE 50 scanner support in MX-15

Yes, that's a different problem. With the usb autosuspend problem the scanner is found, it just doesn't respond to any frontend except scanimage. I just plugged-in my Canon Lide30 and the result led me to this thread. I guess maybe I'll keep the thread from dying, because the Mepis wiki appears to ...

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