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The meltdown and spectre mitigations weren't patched in microcode, they were patched by changing the internal calling methods of the kernel.
by rocqua 3y ago
The meltdown and spectre mitigations weren't patched in microcode, they were patched by changing the internal calling methods of the kernel.
- mike_hearn 3y agoI 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 There were initial software only patches, but those were quickly superseded by microcode+kernel patches, where microcode added features the kernel enabled.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 agoIt was both, and none of them completely addressed the problem. They did need new hardware for that.