Hi,
When applying fixes to IllumOS/OpenIndiana to fix the Meltdown
vulnerability forcing the separation of Kernel Memory from User Memory
into separate Memory spaces, please make sure that the code detects the
CPU type. My Dual AMD CPUs are not susceptible the Meltdown so I do not
want to take the Intel performance hit every time the kernel is accessed.
The Spectre Variant 1 requires software to be run on the host machine
which can then spy on other applications running on the host. The spying
application would have to be able to determine the speculative
instructions executed by another process to access the cached results
before the cached information is flushed. This variant is mitigated by
rebuilding your applications to include protection measures this effects
both AMD and Intel CPUs
The Spectre Variant 2 is an Intel only problem, with only the ARM A75
core vulnerable and given that has not been released, it makes sense to
fix the core prior to release so AMD can get some good PR.
Regards
Russell
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