[PATCH] kexec: x86: resture apic virtual wire mode on shutdown
authorEric W. Biederman <ebiederm@xmission.com>
Sat, 25 Jun 2005 21:57:44 +0000 (14:57 -0700)
committerLinus Torvalds <torvalds@ppc970.osdl.org>
Sat, 25 Jun 2005 23:24:47 +0000 (16:24 -0700)
commit650927ef8ab1e9b05b77a3f32ca7adcedaae9306
tree25ae75b36a2543d6f7ccc6bbe30c35c65d038ee3
parent719e711050482be667dafd39ec787859d353931c
[PATCH] kexec: x86: resture apic virtual wire mode on shutdown

When coming out of apic mode attempt to set the appropriate
apic back into virtual wire mode.  This improves on previous versions
of this patch by by never setting bot the local apic and the ioapic
into veritual wire mode.

This code looks at data from the mptable to see if an ioapic has
an ExtInt input to make this decision.  A future improvement
is to figure out which apic or ioapic was in virtual wire mode
at boot time and to remember it.  That is potentially a more accurate
method, of selecting which apic to place in virutal wire mode.

Signed-off-by: Eric Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
arch/i386/kernel/apic.c
arch/i386/kernel/io_apic.c
include/asm-i386/apic.h
include/asm-i386/apicdef.h