Add ppc64le support from Brent Baude (rhbz 1073102)

4 files changed, 69 insertions, 5 deletions

diff --git a/Makefile.config b/Makefile.config
index 806c56766..348396828 100644
--- a/Makefile.config
+++ b/Makefile.config
@@ -12,7 +12,8 @@ CONFIGFILES	= \
 	$(CFG)-armv7hl.config $(CFG)-armv7hl-lpae.config \
 	$(CFG)-aarch64.config \
 	$(CFG)-ppc.config $(CFG)-ppc-smp.config \
-	$(CFG)-ppc64.config $(CFG)-ppc64p7.config $(CFG)-ppc64-debug.config 
+	$(CFG)-ppc64.config $(CFG)-ppc64p7.config $(CFG)-ppc64-debug.config \
+	$(CFG)-ppc64le.config
 
 PLATFORMS	= x86 x86_64 powerpc powerpc32 powerpc64 s390x arm arm64
 TEMPFILES	= $(addprefix temp-, $(addsuffix -generic, $(PLATFORMS)))
@@ -86,6 +87,9 @@ temp-powerpc32-generic: config-powerpc32-generic temp-powerpc-generic
 temp-powerpc64-generic: config-powerpc64 temp-powerpc-generic
 	perl merge.pl $^ > $@
 
+temp-powerpc64le-generic: config-powerpc64le temp-powerpc64-generic
+	perl merge.pl $^ > $@
+
 temp-s390-generic: config-s390x temp-generic
 	perl merge.pl $^ > $@
 
@@ -116,6 +120,9 @@ $(CFG)-ppc64-debug.config: temp-powerpc64-generic temp-powerpc-debug-generic
 $(CFG)-ppc64p7.config: config-powerpc64p7 temp-powerpc64-generic
 	perl merge.pl $^ powerpc > $@
 
+$(CFG)-ppc64le.config: /dev/null temp-powerpc64le-generic
+	perl merge.pl $^ powerpc > $@
+
 $(CFG)-s390x.config: config-s390x temp-s390-generic
 	perl merge.pl $^ s390 > $@
 
diff --git a/config-powerpc64le b/config-powerpc64le
new file mode 100644
index 000000000..03cb3bdd8
--- /dev/null
+++ b/config-powerpc64le
@@ -0,0 +1,3 @@
+# CONFIG_VIRTUALIZATION is not set
+# CONFIG_BPF_JIT is not set
+CONFIG_CPU_LITTLE_ENDIAN=y
diff --git a/kernel.spec b/kernel.spec
index b662cf51d..86102a6c8 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -222,7 +222,7 @@ Summary: The Linux kernel
 
 %if %{with_vdso_install}
 # These arches install vdso/ directories.
-%define vdso_arches %{all_x86} x86_64 ppc ppc64 ppc64p7 s390 s390x aarch64
+%define vdso_arches %{all_x86} x86_64 ppc ppc64 ppc64p7 s390 s390x aarch64 ppc64le
 %endif
 
 # Overrides for generic default options
@@ -252,7 +252,7 @@ Summary: The Linux kernel
 %endif
 
 # sparse blows up on ppc64 and sparc64
-%ifarch ppc64 ppc ppc64p7
+%ifarch ppc64 ppc ppc64p7 ppc64le
 %define with_sparse 0
 %endif
 
@@ -284,6 +284,17 @@ Summary: The Linux kernel
 %define kernel_image_elf 1
 %endif
 
+%ifarch ppc64le
+%define asmarch powerpc
+%define hdrarch powerpc
+%define all_arch_configs kernel-%{version}-ppc64le.config
+%define image_install_path boot
+%define make_target vmlinux
+%define kernel_image vmlinux
+%define kernel_image_elf 1
+%define with_tools 0
+%endif
+
 %ifarch s390x
 %define asmarch s390
 %define hdrarch s390
@@ -365,7 +376,7 @@ Summary: The Linux kernel
 %endif
 
 # Architectures we build tools/cpupower on
-%define cpupowerarchs %{ix86} x86_64 ppc ppc64 ppc64p7 %{arm} aarch64
+%define cpupowerarchs %{ix86} x86_64 ppc ppc64 ppc64p7 %{arm} aarch64 ppc64le
 
 #
 # Packages that need to be installed before the kernel is, because the %%post
@@ -406,7 +417,7 @@ Version: %{rpmversion}
 Release: %{pkg_release}
 # DO NOT CHANGE THE 'ExclusiveArch' LINE TO TEMPORARILY EXCLUDE AN ARCHITECTURE BUILD.
 # SET %%nobuildarches (ABOVE) INSTEAD
-ExclusiveArch: noarch %{all_x86} x86_64 ppc ppc64 ppc64p7 s390 s390x %{arm} aarch64
+ExclusiveArch: noarch %{all_x86} x86_64 ppc ppc64 ppc64p7 s390 s390x %{arm} aarch64 ppc64le
 ExclusiveOS: Linux
 
 %kernel_reqprovconf
@@ -473,6 +484,7 @@ Source51: config-powerpc32-generic
 Source52: config-powerpc32-smp
 Source53: config-powerpc64
 Source54: config-powerpc64p7
+Source55: config-powerpc64le
 
 Source70: config-s390x
 
@@ -637,6 +649,9 @@ Patch25034: bug-1071998.patch
 #rhbz 1051748
 Patch25035: Bluetooth-allocate-static-minor-for-vhci.patch
 
+#Fixes module loading on ppc64le
+Patch25036: ppc64le_module_fix.patch
+
 # END OF PATCH DEFINITIONS
 
 %endif
@@ -1293,6 +1308,9 @@ ApplyPatch bug-1071998.patch
 #rhbz 1051748
 ApplyPatch Bluetooth-allocate-static-minor-for-vhci.patch
 
+# Fixes module loading on ppc64le
+ApplyPatch ppc64le_module_fix.patch
+
 # END OF PATCH APPLICATIONS
 
 %endif
@@ -2073,6 +2091,7 @@ fi
 #                                    ||     ||
 %changelog
 * Thu Mar 06 2014 Josh Boyer <jwboyer@fedoraproject.org>
+- Add ppc64le support from Brent Baude (rhbz 1073102)
 - Fix depmod error message from hci_vhci module (rhbz 1051748)
 - Fix bogus WARN in iwlwifi (rhbz 1071998)
 
diff --git a/ppc64le_module_fix.patch b/ppc64le_module_fix.patch
new file mode 100644
index 000000000..77e6f55eb
--- /dev/null
+++ b/ppc64le_module_fix.patch
@@ -0,0 +1,35 @@
+From 414794ae6a59c38f6e5793ad50df97cba3dda4e3 Mon Sep 17 00:00:00 2001
+From: Tony Breeds <tony@bakeyournoodle.com>
+Date: Thu, 30 Jan 2014 19:58:55 +1100
+Subject: [PATCH] powerpc/le: Avoid creatng R_PPC64_TOCSAVE relocations for
+ modules.
+
+When building modules with a native le toolchain the linker will
+generate R_PPC64_TOCSAVE relocations when it's safe to omit saving r2 on
+a plt call.  This isn't helpful in the conext of a kernel module and the
+kernel will fail to load those modules with an error like:
+	nf_conntrack: Unknown ADD relocation: 109
+
+This patch tells the linker to avoid createing R_PPC64_TOCSAVE
+relocations allowing modules to load.
+
+Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
+---
+ arch/powerpc/Makefile | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
+index 0f4344e..fff3945 100644
+--- a/arch/powerpc/Makefile
++++ b/arch/powerpc/Makefile
+@@ -74,6 +74,9 @@ override CROSS32AS += -mlittle-endian
+ LDEMULATION	:= lppc
+ GNUTARGET	:= powerpcle
+ MULTIPLEWORD	:= -mno-multiple
++ifeq ($(call cc-option-yn,-mno-save-toc-indirect),y)
++       KBUILD_CFLAGS_MODULE += -mno-save-toc-indirect
++endif
+ else
+ ifeq ($(call cc-option-yn,-mbig-endian),y)
+ override CC	+= -mbig-endian
+--