[PATCH v4 2/5] x86/boot/compressed/64: Add CPUID sanity check to early #VC handler

From: Joerg Roedel The early #VC handler which doesn't have a GHCB can only handle CPUID exit codes. It is needed by the early boot code to handle #VC exceptions raised in verify_cpu() and to get the position of the C bit. But the CPUID information comes from the hypervisor, which is untrusted

Re: [PATCH v4 2/5] x86/boot/compressed/64: Add CPUID sanity check to early #VC handler

On 10/28/20 11:46 AM, Joerg Roedel wrote: > From: Joerg Roedel > > The early #VC handler which doesn't have a GHCB can only handle CPUID > exit codes. It is needed by the early boot code to handle #VC > exceptions raised in verify_cpu() and to get the position of the C > bit. > > But the CPUID