Ingo Molnar wrote: >* Zachary Amsden <zach@xxxxxxxxxx> wrote: > > > >>APM BIOS code has a protective wrapper that runs it only on CPU zero. >>Thus, no need to set APM BIOS segments in the GDT for other CPUs. >> >> > >hm, do we want (need) to have that CPU#0 assumption forever? > > Can't hurt, and APM is largely obsolete because of ACPI, so I'm only concerned with trimming and keeping adequate protection of the kernel from APM code while maintaining correctness. I don't have a nice set of old machines with enough wacky APM BIOSen to validate that unpinning the CPU is ok. Zach
