port-i386/45160: 8259 PIC masking in IOAPIC mode

[jakllsch%kollasch.net@localhost]

        Note: There was a bad value `no | yes' for the field `Confidential'.
        It was set to the default value of `yes'.

>Number:         45160
>Category:       port-i386
>Synopsis:       8259 PICs need to be masked when switching to IOAPIC
>Confidential:   yes
>Severity:       serious
>Priority:       medium
>Responsible:    port-i386-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Jul 20 01:50:00 +0000 2011
>Originator:     Jonathan A. Kollasch
>Release:        NetBSD 5.99.54
>Organization:
        
>Environment:
        
        
System: NetBSD trantor.kollasch.net 5.99.54 NetBSD 5.99.54 (TRANTOR) #0: Fri 
Jul 8 21:51:39 CDT 2011 
jakllsch%trantor.kollasch.net@localhost:/local/jakllsch/nbsd-head/build-amd64/objdir/sys/arch/amd64/compile/TRANTOR
 amd64
Architecture: x86_64
Machine: amd64
>Description:
Leaving the 8259 PIC interrupts unmasked while using the IOAPIC causes spurious 
interrupts that somehow lead to hardware deadlock.
>How-To-Repeat:
Run NetBSD on a recent ASUS AMD board/box.
>Fix:
Mask the 8259 PIC interrupts when switching to the IOAPIC.

>Unformatted: