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I think it was both. There were initial software only patches, but those were quickly superseded by microcode+kernel patches, where microcode added features the

I think it was both. There were initial software only patches, but those were quickly superseded by microcode+kernel patches, where microcode added features the kernel enabled. IBRS or something like that.

cbsmith 3y ago
It was both, and none of them completely addressed the problem. They did need new hardware for that.