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A comment on Reading privileged memory with a side-channel. Parent comment

Re:Reading privileged memory with a side-channel by binarycrusader on Wednesday January 03, 2018 @10:27PM (#16067807)
"Spectre" is very bad news and affects all modern CPUs

It's not yet clear whether it affects all modern CPUs, notably I have yet to see any mention of modern POWER/MIPS/SPARC-based designs. If someone has pointers, those particular cases would probably be quite interesting.

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Re:Reading privileged memory with a side-channel by cthalupa on Wednesday January 03, 2018 @10:58PM (#16067936)
https://access.redhat.com/security/vulnerabilities/speculati...

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).

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Re:Reading privileged memory with a side-channel by pizlonator on Wednesday January 03, 2018 @10:39PM (#16067859)
It affects CPUs that do speculative execution. Pretty sure some powers do.
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Re:Reading privileged memory with a side-channel by binarycrusader on Wednesday January 03, 2018 @11:17PM (#16067998)
I wonder to what degree some systems are affected. I believe Solaris already uses separate address spaces on SPARC for user and kernel. I haven’t looked over the SPARC architecture manual to see if they allow speculative execution beyond privilege boundaries.
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Re:Reading privileged memory with a side-channel by olliej on Thursday January 04, 2018 @12:08AM (#16068188)
That only prevent reading over higher privilege (the meltdown vulnerability) it doesn't protect the arbitrary user land reads from spectre.
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