Messages in this thread | | | Date | Tue, 08 Nov 2005 04:53:43 -0800 | From | Zachary Amsden <> | Subject | Re: [PATCH 14/21] i386 Apm is on cpu zero only |
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Ingo Molnar wrote:
>* Zachary Amsden <zach@vmware.com> 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.
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