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From: Adrian Chadd <adrian@FreeBSD.org>
Date: Sat, 30 May 2009 08:53:13 +0000 (UTC)
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Subject: cvs commit: src/sys/xen/evtchn evtchn.c
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adrian      2009-05-30 08:53:13 UTC

  FreeBSD src repository

  Modified files:
    sys/xen/evtchn       evtchn.c 
  Log:
  SVN rev 193085 on 2009-05-30 08:53:13Z by adrian
  
  Make ipi_cpu() function as intended.
  
  IPI's in Xen are implemented through hypervisor event channels.
  The MP code creates a pair of IRQs for each base IPI per CPU
  (one for IPI function dispatch calls, one for IPI bitmap dispatch calls.)
  Using PCPU_GET() was returning the IRQ of the IPI handler for the
  current CPU; thus calls to ipi_cpu() were sending itself a message.
  Instead, looking up the IPI in the target CPU ipi-to-irq map is needed.
  
  Note: This doesn't fix Xen SMP (far from it!) but it at least
  sends IPI's to the right places. Next - sending IPIs..
  
  PR:     135069
  
  Revision  Changes    Path
  1.10      +4 -1      src/sys/xen/evtchn/evtchn.c