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WRONG. You fell for the Intel PR strategy. AMD is completely unaffected by Meltdown, since AMD checks permissions before fetching memory into the cache.
by contrarian_ 9y ago
WRONG. You fell for the Intel PR strategy. AMD is completely unaffected by Meltdown, since AMD checks permissions before fetching memory into the cache.
- wohlergehen 9y agoSection 6.4 of the Meltdown paper seems to indicate that the same flaw is present in AMD CPUs, but not easily exploitable. Do you have a different source for that?
- contrarian_ 9y agoThe toy example referenced in section 6.4 is actually closer to Spectre. It's missing the crucial distinction that the speculatively loaded address should belong to a page inaccessible from the current ring level. To see why that toy example is insufficient, consider that you could simply execute the load directly without putting an exception in front of it and you would be able to read the value.