Well , Linus already said perhaps linux should look at the arm folk . Should that happen , well guess what ?
From my very small knowledge , 90+% of internet infrastructure runs on linux .
https://developer.arm.com/support/security-update
The Meltdown/Spectre class of attacks affect certain CPUs. Spectre is a microarchitectural attack on any CPU that does speculation and uses data caches, regardless of architecture.
Arguably, it has been handling Meltdown and Spectre in a much much more humble and transparent way. See https://developer.arm.com/support/security-update/compiler-s... for work they are doing with the compiler communities to address the Variant 1 both on current and future chips.