On 18Jan04:1336+0000, Guest, Darren wrote: > > Not sure if people have seen that attached article or heard : of the 'intel' chip issues from elsewhere: > https://www.theregister.co.uk/2018/01/02/intel_cpu_design_flaw/ > > The 'fix' for meltdown (at least) is apparently to change the > Linux kernel which will potentially affect performance. I'm > pretty sure that zSeries isn't affected by the issue (is it?), > but if the Linux Kernel is changed, are we likely to see a > performance hit on Linux running on zSeries as well (even > though we don't need the fix)? > > Best case scenario, can I tell my management that these won't > affect Linux on z?
According to this article published by Red Hat, you cannot. : Red Hat has been made aware of multiple microarchitectural : (hardware) implementation issues affecting many modern : microprocessors, requiring updates to the Linux kernel, : virtualization-related components, and/or in combination : with a microcode update. An unprivileged attacker can use : these flaws to bypass conventional memory security : restrictions in order to gain read access to privileged : memory that would otherwise be inaccessible. There are 3 : known CVEs related to this issue in combination with Intel, : AMD, and ARM architectures. Additional exploits for other : architectures are also known to exist. These include IBM : System Z, POWER8 (Big Endian and Little Endian), and : POWER9 (Little Endian). https://access.redhat.com/security/vulnerabilities/speculativeexecution?sc_cid=7016000000127NJAAY -- <not cent from sell> May the LORD God bless you exceedingly abundantly! Dave_Craig______________________________________________ "So the universe is not quite as you thought it was. You'd better rearrange your beliefs, then. Because you certainly can't rearrange the universe." __--from_Nightfall_by_Asimov/Silverberg_________________ ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
