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A comment on Blacksmith – Rowhammer bit flips on all DRAM devices today despite mitigations. Parent comment

Re:Blacksmith – Rowhammer bit flips on all DRAM devices toda... by froh on Monday November 15, 2021 @02:21PM (#29231422)
Wow. Your right, for spectre patches were needed on system z.

https://www.suse.com/de-de/support/kb/doc/?id=000019105

Meltdown didn't affect z nor amd.

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Re:Blacksmith – Rowhammer bit flips on all DRAM devices toda... by monocasa on Monday November 15, 2021 @02:29PM (#29231549)
Series Z and POWER up to and including POWER9 are susceptible to meltdown as well.

https://www.zdnet.com/article/meltdown-spectre-ibm-preps-fir...

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Re:Blacksmith – Rowhammer bit flips on all DRAM devices toda... by froh on Tuesday November 16, 2021 @12:42AM (#29237296)
Ok. debian is even more explicit than suse above regarding "no meltdown on Z":

https://wiki.debian.org/DebianSecurity/SpectreMeltdown#Syste...

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Re:Blacksmith – Rowhammer bit flips on all DRAM devices toda... by classichasclass on Monday November 15, 2021 @03:56PM (#29232608)
But, not 7400 G4 and earlier.

https://tenfourfox.blogspot.com/2018/01/actual-field-testing...

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Re:Blacksmith – Rowhammer bit flips on all DRAM devices toda... by monocasa on Monday November 15, 2021 @04:45PM (#29233202)
Which aren't POWER cores. POWER is an IBM trademark; the 7400 is a Motorola PowerPC core.
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Re:Blacksmith – Rowhammer bit flips on all DRAM devices toda... by classichasclass on Monday November 15, 2021 @04:47PM (#29233218)
A fair point, though early POWER cores probably aren't for the same reasons these aren't (can't speculate through indirect branches using SPRs), and IBM was involved in the development of both.
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