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by ClassicHasClass
Sat Jan 13, 2018 9:09 pm
Forum: Everything Else
Topic: [insert "ohai again!" thing here]
Replies: 6
Views: 166

Re: [insert "ohai again!" thing here]

Welcome back.
by ClassicHasClass
Sat Jan 13, 2018 9:07 pm
Forum: IBM
Topic: Spectre and Meltdown
Replies: 10
Views: 295

Re: Spectre and Meltdown

The POWER6 is not vulnerable to Meltdown. It _is_ vulnerable to Spectre. It's not clear whether IBM will offer firmware patches for it yet. source: tested my own system with the PoC Hurrah for my POWER5 then. Not necessarily: POWER4 (and then most likely also PowerPC 970 and derivatives) and POWER5...
by ClassicHasClass
Fri Jan 12, 2018 9:08 pm
Forum: IBM
Topic: Spectre and Meltdown
Replies: 10
Views: 295

Re: Spectre and Meltdown

The POWER6 is not vulnerable to Meltdown.

It _is_ vulnerable to Spectre. It's not clear whether IBM will offer firmware patches for it yet.

source: tested my own system with the PoC
by ClassicHasClass
Thu Jan 11, 2018 8:52 am
Forum: Everything Else
Topic: Intel backdoor: not a bug, a feature (buy a new processor!!!)
Replies: 43
Views: 1022

Re: Intel backdoor: not a bug, a feature (buy a new processor!!!)

uunix wrote:If you have a web application running on a server, that just does DB serving and web pages, therefore no outgoing 'browsing', could this be affected do we know?


Assuming it's running your code and not arbitrary code someone else sneaked onto it, I wouldn't think there would be much risk.
by ClassicHasClass
Tue Jan 09, 2018 10:52 am
Forum: Miscellaneous Operating Systems/Hardware
Topic: Talos Secure Workstation
Replies: 59
Views: 3202

Re: Talos Secure Workstation

Thanks for the data. My conclusion from that is that the DLSDs' power management does indeed foul the attack. The hot cache turned up a bit in a couple other people's testing, but I can't really find any reliable pattern about what level of cache priming is necessary.
by ClassicHasClass
Sun Jan 07, 2018 11:22 pm
Forum: Miscellaneous Operating Systems/Hardware
Topic: Talos Secure Workstation
Replies: 59
Views: 3202

Re: Talos Secure Workstation

Sure. The attached zip contains the generic PPC, 750, 7400 and 7450 binaries at all four optimization levels so you can reproduce the test. How fast is your DLSD? Is it an A1139 (mine is)?
by ClassicHasClass
Sun Jan 07, 2018 9:12 pm
Forum: Miscellaneous Operating Systems/Hardware
Topic: Talos Secure Workstation
Replies: 59
Views: 3202

Re: Talos Secure Workstation

It's not that the BP can't take fixed branches, just indirect ones (where the CPU can branch to the contents of a register). The crux with Spectre, in short, is that if the attacker can get some control of the register in question or can get the CPU to speculatively execute a code path that sets tha...
by ClassicHasClass
Fri Jan 05, 2018 3:43 pm
Forum: Miscellaneous Operating Systems/Hardware
Topic: Talos Secure Workstation
Replies: 59
Views: 3202

Re: Talos Secure Workstation

IBM will issue firmware updates for at least the POWER7+ forward. My bet is these disable speculative execution of indirect branches.

https://www.ibm.com/blogs/psirt/potenti ... er-family/
by ClassicHasClass
Fri Jan 05, 2018 11:18 am
Forum: Miscellaneous Operating Systems/Hardware
Topic: Talos Secure Workstation
Replies: 59
Views: 3202

Re: Talos Secure Workstation

Unfortunately in-order CPUs can still speculate on execution; the difference is in how they issue instructions, which can be done speculatively or not, so the POWER6 is probably in the same risk category as the G5.

Interestingly, the RPi cores don't speculate per Eben, so they're immune completely.
by ClassicHasClass
Fri Jan 05, 2018 8:43 am
Forum: Miscellaneous Operating Systems/Hardware
Topic: Talos Secure Workstation
Replies: 59
Views: 3202

Re: Talos Secure Workstation

Talos is definitely susceptible to Spectre or something like it, though the attack would need to take into account any of the microarchitectural oddities of later Power ISA. But after some late night work on the datasheets, my opinion is that due to unusual limitations on speculative execution of in...
by ClassicHasClass
Tue Jan 02, 2018 7:45 am
Forum: IBM
Topic: AIXPDS site closed :(
Replies: 10
Views: 1142

Re: AIXPDS site closed :(

It may, though I don't think it does from the CD. I don't recall since the only xlc I ever used personally was installed off tape. 8)
by ClassicHasClass
Mon Jan 01, 2018 8:10 pm
Forum: Everything Else
Topic: your latest purchase
Replies: 876
Views: 30267

Re: your latest purchase

Ricoh Theta V for our upcoming vacation.
by ClassicHasClass
Mon Jan 01, 2018 8:09 pm
Forum: IBM
Topic: AIXPDS site closed :(
Replies: 10
Views: 1142

Re: AIXPDS site closed :(

Understood, though naturally the 4.1 and even 3.2.5 stuff will work on 4.3 if you don't mind some older versions.
by ClassicHasClass
Sat Dec 30, 2017 3:26 pm
Forum: IBM
Topic: AIXPDS site closed :(
Replies: 10
Views: 1142

Re: AIXPDS site closed :(

I have some of the 4.1 and 3.2.5 stuff which I use(d) on my Apple Network Server.

gopher://gopher.floodgap.com/1/archive/ ... slib-aix-4
by ClassicHasClass
Sat Dec 30, 2017 3:20 pm
Forum: Miscellaneous Operating Systems/Hardware
Topic: Talos Secure Workstation
Replies: 59
Views: 3202

Re: Talos Secure Workstation

POWER is never going undercut x86_64 on cost because it's up against Chipzilla; Intel will always have the economy of scale. IBM's not a chip company anymore, and hasn't been for years. Where POWER is going to succeed is if they can capitalize on painting Intel as taking control of your system away ...

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