Revamp base system packaging of kernels to enable up/smp selection

at runtime and to support distributing additional kernels:
o remove kernel from the base tarball
o add new kernel tarballs
o build + package both SMP and GENERIC kernels when an <arch>/conf/SMP
  config file is present
o add sysinstall support for multiple kernels
o update sysinstall to probe for the number of cpus on a system
  and auto-select smp/up kernel accordingly
o add a post-kernels install hook to fixup /boot/kernel
o add -ldevinfo to boot crunch for sysinstall's cpu probing logic

Notes:
1. On HEAD this code is not currently used because GENERIC kernels
   include SMP.  This work is mainly intended for RELENG_6 where the
   GENERIC kernel is UP.  If HEAD changes to match then just enable
   WITH_SMP in sysinstall/Makefile.
2. The cpu probing support is done with acpi and MPTable; this means
   some systems will require work for auto-detection to work.
3. The handling of /boot/kernel may need to be revisited; for now
   we rename one kernel at the last moment (SMP if installed, otherwise
   GENERIC).  There are other, possibly better, approaches.

Lots of help from ru, emaste, scottl, and jhb.

1 files changed, 30 insertions, 0 deletions

diff --git a/usr.sbin/sade/Makefile b/usr.sbin/sade/Makefile
index 751d10c..c735c26 100644
--- a/usr.sbin/sade/Makefile
+++ b/usr.sbin/sade/Makefile
@@ -23,6 +23,36 @@ CFLAGS+= -I${.CURDIR}/../../gnu/lib/libdialog -I.
 DPADD=	${LIBDIALOG} ${LIBNCURSES} ${LIBUTIL} ${LIBDISK} ${LIBFTPIO}
 LDADD=	-ldialog -lncurses -lutil -ldisk -lftpio
 
+#
+# When distributions have both UP and SMP kernels sysinstall
+# will probe for the number of cpus on the target machine and
+# automatically select which is appropriate.  This can be overridden
+# through the menus or both kernels can be installed (with the
+# most "appropriate" one setup as /boot/kernel).  For now this
+# is done for i386 and amd64; for other systems support must be
+# added to identify the cpu count if acpi and MPTable probing
+# is insufficient.
+#
+# The unmber of cpus probed is passed through the environment in
+# VAR_NCPUS ("ncpus") to scripts.
+#
+# Note that WITH_SMP is a compile time option that enables the
+# builtin menus for the SMP kernel configuration.  If this kernel
+# is not built (see release/Makefile) then this should not be
+# enabled as sysinstall may try to select an SMP kernel config
+# where none is available.  This option should not be needed--we
+# should probe for an SMP kernel in the distribution but doing
+# that is painful because of media changes and the structure of
+# sysinstall so for now it's a priori.
+#
+.if ${MACHINE_ARCH} == "i386" || ${MACHINE_ARCH} == "amd64"
+SRCS+=	acpi.c biosmptable.c
+# NB: HEAD has SMP in GENERIC so only one kernel
+#CFLAGS+=-DWITH_SMP	
+DPADD+=	${LIBDEVINFO}
+LDADD+=	-ldevinfo
+.endif
+
 CLEANFILES=	makedevs.c rtermcap
 CLEANFILES+=	keymap.tmp keymap.h countries.tmp countries.h