Re: [RFC PATCH 0/8] x86_64: Harden compressed kernel, part 1

Dave Hansen
2022-08-01T16:49:03Z

On 8/1/22 09:38, Evgeniy Baskov wrote:
> This is the first half of changes aimed to increase security of early
> boot code of compressed kernel for x86_64 by enforcing memory protection
> on page table level.

Could you share a little more background here? Hardening is good, but
you _can_ have too much of a good thing.

Is this part of the boot cycle becoming a target for attackers in
trusted boot environments? Do emerging confidential computing
technologies like SEV and TDX cause increased reliance on compressed
kernel security?

In other words, why is *THIS* important versus all the other patches
floating around out there?