[PATCH] enable xen-ia64 in fedora kernel cvs

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This patch enables xen-ia64 support in the fedora kernel.  It applies
to the cvs tree checked out according to the instructions at
http://people.redhat.com/davej/

At this point I'm requesting this patch be applied.  Until the
hypervisor is updated to match the generic linux-2.6-xen.patch, it
won't actually boot xen on ia64, but IMHO the changes are clean and
there's no reason to believe they won't work when %includexen and
%buildxen are re-enabled.  (It has already been demonstrated
previously on this list that the patches work in general and that
fedora-xen-ia64 builds, boots and runs ;-)

Breakdown of the changes:

- Add $(CFG)-ia64-xen.config target to devel/Makefile.config

- Add devel/configs/config-xen-ia64 override snippet

- Add xen_flags, xen_target and xen_image to spec-file to genericize
  building of the hypervisor

- Add two symlinks that are specific to building on ia64.  These
  symlinks aren't required in xen-ia64-unstable upstream, so include
  shell conditionals to announce when they should be retired from the
  spec file

Caveats:

- As described earlier, we need Juan to start matching the hypervisor
  tarball to the xen-unstable changeset associated with
  linux-2.6-xen.patch.  It breaks boot on ia64 presently, but could
  affect any architecture, so this is an important change in general.

- As of 2.6.17, configs/config-ia64-generic needs CONFIG_PNPACPI=y to
  boot on systems without a graphics head.  This is not related to xen
  so I didn't include it in this patch.  I'll be sending a separate
  patch for this issue, cc'ing fedora-ia64

Signed-off-by: Aron Griffis <aron@xxxxxx>

 devel/configs/config-xen-ia64 |   19 ++++++++++++
 devel/Makefile.config         |   18 ++++++++++--
 devel/kernel-2.6.spec         |   60 ++++++++++++++++++++++++++++------------
 3 files changed, 76 insertions(+), 21 deletions(-)

diff -r da3fa23e3220 -r 08b309b90c4f devel/Makefile.config
--- a/devel/Makefile.config	Thu Jul 06 11:34:32 2006 -0400
+++ b/devel/Makefile.config	Thu Jul 06 16:40:56 2006 -0400
@@ -13,7 +13,8 @@ CONFIGFILES	= \
 	$(CFG)-ppc.config $(CFG)-ppc-smp.config \
 	$(CFG)-ppc64.config $(CFG)-ppc64-kdump.config $(CFG)-ia64.config \
 	$(CFG)-i686-xen-PAE.config \
-	$(CFG)-i686-xen.config $(CFG)-x86_64-xen.config
+	$(CFG)-i686-xen.config $(CFG)-x86_64-xen.config \
+	$(CFG)-ia64-xen.config
 
 PLATFORMS	= x86 x86_64 powerpc powerpc32 powerpc64 s390 ia64 # sparc sparc64
 TEMPFILES	= $(addprefix temp-, $(addsuffix -generic, $(PLATFORMS)))
@@ -21,8 +22,10 @@ configs: $(CONFIGFILES)
 configs: $(CONFIGFILES)
 	@rm -f kernel-*-config
 	@rm -f $(TEMPFILES)
-	@rm -f temp-xen-generic temp-x86-xen-generic temp-x86_64-xen-generic \
-		temp-generic temp-x86_64-xen-generic-tmp
+	@rm -f temp-generic temp-xen-generic \
+		temp-x86-xen-generic \
+		temp-x86_64-xen-generic temp-x86_64-xen-generic-tmp \
+		temp-ia64-xen-generic temp-ia64-xen-generic-tmp
 
 # Augment the clean target to clean up our own cruft
 clean ::
@@ -69,6 +72,12 @@ temp-x86_64-xen-generic-tmp: configs/con
 	perl scripts/merge.pl $^ > $@
 
 temp-x86_64-xen-generic: configs/config-xen-x86_64 temp-x86_64-xen-generic-tmp
+	perl scripts/merge.pl $^ > $@
+
+temp-ia64-xen-generic-tmp: configs/config-xen-generic temp-ia64-generic
+	perl scripts/merge.pl $^ > $@
+
+temp-ia64-xen-generic: configs/config-xen-ia64 temp-ia64-xen-generic-tmp
 	perl scripts/merge.pl $^ > $@
 
 kernel-$(VERSION)-i686.config: configs/config-i686 temp-x86-generic
@@ -134,3 +143,6 @@ kernel-$(VERSION)-x86_64-xen.config: con
 kernel-$(VERSION)-x86_64-xen.config: configs/config-xen-xen temp-x86_64-xen-generic
 	perl scripts/merge.pl $^ x86_64 > $@
 
+kernel-$(VERSION)-ia64-xen.config: configs/config-xen-xen temp-ia64-xen-generic
+	perl scripts/merge.pl $^ ia64 > $@
+
diff -r da3fa23e3220 -r 08b309b90c4f devel/kernel-2.6.spec
--- a/devel/kernel-2.6.spec	Thu Jul 06 11:34:32 2006 -0400
+++ b/devel/kernel-2.6.spec	Thu Jul 06 16:40:56 2006 -0400
@@ -31,6 +31,9 @@ Summary: The Linux kernel (the core of t
 %define xen_version 20060610
 %define make_target bzImage
 %define kernel_image x86
+%define xen_flags verbose=y debug=y crash_debug=y
+%define xen_target vmlinuz
+%define xen_image vmlinuz
 
 %define KVERREL %{PACKAGE_VERSION}-%{PACKAGE_RELEASE}
 
@@ -50,10 +53,14 @@ Summary: The Linux kernel (the core of t
 %define all_arch_configs $RPM_SOURCE_DIR/kernel-%{kversion}-*.config
 %endif
 
-# Xen and kdump only build on i686 and x86_64 ...
+# kdump only builds on i686 and x86_64
 %ifnarch i686 x86_64
+%define buildkdump 0
+%endif
+
+# Xen only builds on i686, x86_64 and ia64 ...
+%ifnarch i686 x86_64 ia64
 %define buildxen 0
-%define buildkdump 0
 %endif
 
 %ifarch ppc64
@@ -127,11 +134,15 @@ Summary: The Linux kernel (the core of t
 %endif
 
 %ifarch ia64
-%define all_arch_configs $RPM_SOURCE_DIR/kernel-%{kversion}-ia64.config
+%define all_arch_configs $RPM_SOURCE_DIR/kernel-%{kversion}-ia64*.config
 %define image_install_path boot/efi/EFI/redhat
 #define signmodules 1
 %define make_target compressed
 %define kernel_image vmlinux.gz
+# ia64 doesn't building with debug=y at the moment
+%define xen_flags verbose=y crash_debug=y
+%define xen_target compressed
+%define xen_image vmlinux.gz
 %endif
 
 #
@@ -230,6 +241,7 @@ Source34: kernel-%{kversion}-x86_64-xen.
 Source34: kernel-%{kversion}-x86_64-xen.config
 Source35: kernel-%{kversion}-i686-kdump.config
 Source36: kernel-%{kversion}-i686-xen-PAE.config
+Source37: kernel-%{kversion}-ia64-xen.config
 
 #Source66: kernel-%{kversion}-sparc.config
 #Source67: kernel-%{kversion}-sparc64.config
@@ -774,17 +786,29 @@ cd linux-%{kversion}.%{_target_cpu}
 #
 %patch950 -p1 -b .p.xen
 #
-# ... and back out all the ia64-specific sections, as they currently prevent
+# ... and back out all the tpm-specific sections, as they currently prevent
 # non-xen builds from working.
-# Now also with tpm
-#
-for f in `find drivers/char/tpm arch/ia64/ include/asm-ia64/ include/xen/interface/arch-ia64.h* -type f -name "*.p.xen"` ; do \
+#
+for f in `find drivers/char/tpm -type f -name "*.p.xen"` ; do \
     g=`dirname $f`/`basename $f .p.xen`; \
     mv "$f" "$g"; \
     if [ ! -s "$g" ] ; then rm -f "$g" ; fi; \
 done
 # Delete the rest of the backup files, they just confuse the build later
 find -name "*.p.xen" | xargs rm -f
+
+# These are fixed in xen-ia64-unstable, they will announce their retirement
+# automatically when the changes propogate down the chain to Juan
+if [[ ! -f arch/ia64/kernel/asm-offsets.c ]]; then
+    ln -sf ../../../../xen/include/asm-ia64/asm-xsi-offsets.h include/asm-ia64/xen/
+else
+    printf "*\n* please retire asm-xsi-offsets.h symlink from kernel-2.6.spec\n*\n"
+fi
+if grep -q xenia64_init drivers/xen/core/Makefile; then
+    ln -sf ../../../arch/ia64/xen/drivers/xenia64_init.c drivers/xen/core/
+else
+    printf "*\n* please retire xenia64_init.c symlink from kernel-2.6.spec\n*\n"
+fi
 
 %patch951 -p1
 %patch952 -p1
@@ -1192,15 +1216,15 @@ mkdir -p $RPM_BUILD_ROOT/boot
 %if %{includexen}
 %if %{buildxen}
   cd xen
-  mkdir -p $RPM_BUILD_ROOT/%{image_install_path}
+  mkdir -p $RPM_BUILD_ROOT/%{image_install_path} $RPM_BUILD_ROOT/boot
 %if %{buildxenPAE}
-  make debug=y verbose=y crash_debug=y pae=y
-  install -m 644 xen.gz $RPM_BUILD_ROOT/boot/xen.gz-%{KVERREL}-PAE
+  make %{?_smp_mflags} %{xen_flags} pae=y
+  install -m 644 xen.gz $RPM_BUILD_ROOT/%{image_install_path}/xen.gz-%{KVERREL}-PAE
   install -m 755 xen-syms $RPM_BUILD_ROOT/boot/xen-syms-%{KVERREL}-PAE
   make clean
 %endif
-  make debug=y verbose=y crash_debug=y
-  install -m 644 xen.gz $RPM_BUILD_ROOT/boot/xen.gz-%{KVERREL}
+  make %{?_smp_mflags} %{xen_flags}
+  install -m 644 xen.gz $RPM_BUILD_ROOT/%{image_install_path}/xen.gz-%{KVERREL}
   install -m 755 xen-syms $RPM_BUILD_ROOT/boot/xen-syms-%{KVERREL}
   cd ..
 %endif
@@ -1222,11 +1246,11 @@ BuildKernel %make_target %kernel_image s
 
 %if %{includexen}
 %if %{buildxenPAE}
-BuildKernel vmlinuz vmlinuz xen-PAE
+BuildKernel %xen_target %xen_image xen-PAE
 %endif
 
 %if %{buildxen}
-BuildKernel vmlinuz vmlinuz xen
+BuildKernel %xen_target %xen_image xen
 %endif
 %endif
 
@@ -1331,7 +1355,7 @@ fi
 %post xen
 [ ! -x /usr/sbin/module_upgrade ] || /usr/sbin/module_upgrade %{rpmversion}-%{release}-xen
 if [ -e /proc/xen/xsd_kva -o ! -d /proc/xen ]; then 
-	/sbin/new-kernel-pkg --package kernel-xen --mkinitrd --depmod --install --multiboot=/boot/xen.gz-%{KVERREL} %{KVERREL}xen
+	/sbin/new-kernel-pkg --package kernel-xen --mkinitrd --depmod --install --multiboot=/%{image_install_path}/xen.gz-%{KVERREL} %{KVERREL}xen
 else 
 	/sbin/new-kernel-pkg --package kernel-xen --mkinitrd --depmod --install %{KVERREL}xen
 fi
@@ -1348,7 +1372,7 @@ fi
 %post xen-PAE
 [ ! -x /usr/sbin/module_upgrade ] || /usr/sbin/module_upgrade %{rpmversion}-%{release}-xen-PAE
 if [ -e /proc/xen/xsd_kva ]; then 
-	/sbin/new-kernel-pkg --package kernel-xen-PAE --mkinitrd --depmod --install --multiboot=/boot/xen.gz-%{KVERREL}-PAE %{KVERREL}xen-PAE
+	/sbin/new-kernel-pkg --package kernel-xen-PAE --mkinitrd --depmod --install --multiboot=/%{image_install_path}/xen.gz-%{KVERREL}-PAE %{KVERREL}xen-PAE
 else 
 	/sbin/new-kernel-pkg --package kernel-xen-PAE --mkinitrd --depmod --install %{KVERREL}xen-PAE
 fi
@@ -1477,7 +1501,7 @@ fi
 /boot/symvers-%{KVERREL}xen.gz
 /boot/symsets-%{KVERREL}xen.tar.gz
 /boot/config-%{KVERREL}xen
-/boot/xen.gz-%{KVERREL}
+/%{image_install_path}/xen.gz-%{KVERREL}
 /boot/xen-syms-%{KVERREL}
 %dir /lib/modules/%{KVERREL}xen
 /lib/modules/%{KVERREL}xen/kernel
@@ -1502,7 +1526,7 @@ fi
 /boot/symvers-%{KVERREL}xen-PAE.gz
 /boot/symsets-%{KVERREL}xen-PAE.tar.gz
 /boot/config-%{KVERREL}xen-PAE
-/boot/xen.gz-%{KVERREL}-PAE
+/%{image_install_path}/xen.gz-%{KVERREL}-PAE
 /boot/xen-syms-%{KVERREL}-PAE
 %dir /lib/modules/%{KVERREL}xen-PAE
 /lib/modules/%{KVERREL}xen-PAE/kernel
diff -r da3fa23e3220 -r 08b309b90c4f devel/configs/config-xen-ia64
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/devel/configs/config-xen-ia64	Thu Jul 06 16:40:56 2006 -0400
@@ -0,0 +1,19 @@
+# override i686 xen
+
+# CONFIG_X86 is not set
+# CONFIG_X86_XEN is not set
+CONFIG_IA64=y
+CONFIG_XEN=y
+CONFIG_XEN_IA64_DOM0_VP=y
+CONFIG_XEN_DISABLE_SERIAL=y
+
+# override ia64 generic
+
+# CONFIG_IA64_GENERIC is not set
+CONFIG_IA64_DIG=y
+# CONFIG_DISCONTIGMEM_MANUAL is not set
+CONFIG_FLATMEM_MANUAL=y
+CONFIG_FORCE_MAX_ZONEORDER=11
+
+# internal #defines conflict with xen-ia64
+# CONFIG_FB_NEOMAGIC is not set

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