On 5/1/25 15:54, Changyuan Lyu wrote: > From: Alexander Graf <g...@amazon.com> > > kexec handover (KHO) creates a metadata that the kernels pass between each > other during kexec. This metadata is stored in memory and kexec image > contains a (physical) pointer to that memory. > > In addition, KHO keeps "scratch regions" available for kexec: physically > contiguous memory regions that are guaranteed to not have any memory that > KHO would preserve. The new kernel bootstraps itself using the scratch > regions and sets all handed over memory as in use. When subsystems that > support KHO initialize, they introspect the KHO metadata, restore preserved > memory regions, and retrieve their state stored in the preserved memory. > > Enlighten x86 kexec-file and boot path about the KHO metadata and make sure > it gets passed along to the next kernel.
Acked-by: Dave Hansen <dave.han...@linux.intel.com>
