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The hypervisor on EC2 will (or rather: it can, and I assume it will) block your virtualized Kernel (running on Ring-0) from messing with the APIC. This (running

by cnvogel 11y ago

The hypervisor on EC2 will (or rather: it can, and I assume it will) block your virtualized Kernel (running on Ring-0) from messing with the APIC. This (running a hypervisor) is one of the possible mitigations for the sinkhole-exploit.