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Explain why we hardwire lapic_cpu_number() to 0 on Xen.

This commit is contained in:
bouyer 2010-11-14 13:40:31 +00:00
parent 5d7952a5d1
commit fd46720a12
1 changed files with 7 additions and 1 deletions
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8
sys/arch/xen/include/i82489var.h
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@ -1,5 +1,11 @@
/* $NetBSD: i82489var.h,v 1.1 2006/09/28 18:53:15 bouyer Exp $ */
/* $NetBSD: i82489var.h,v 1.2 2010/11/14 13:40:31 bouyer Exp $ */
#include <x86/i82489var.h>
/*
* Xen doesn't give acces to the lapic. In addition, the lapic number provided
* by the dom0 to Xen when setting up iopics is ignored, the hypervisor will
* decide itself to which physical CPU the interrupt should be routed to.
*/
#undef lapic_cpu_number
#define lapic_cpu_number() (0)