Merge pull request #196 from nathanchance/ppc64

PPC64 big endian

Author: nathanchance

.travis.yml

@@ -12,6 +12,8 @@ matrix:
       env: ARCH=arm64 LD=ld.lld-9
     - name: "ARCH=ppc32"
       env: ARCH=ppc32
+    - name: "ARCH=ppc64"
+      env: ARCH=ppc64
     - name: "ARCH=ppc64le LD=ld.lld"
       env: ARCH=ppc64le LD=ld.lld-9
     - name: "ARCH=x86_64 LD=ld.lld"
@@ -34,6 +36,9 @@ matrix:
     - name: "ARCH=ppc32 REPO=linux-next"
       env: ARCH=ppc32 REPO=linux-next
       if: type = cron
+    - name: "ARCH=ppc64 REPO=linux-next"
+      env: ARCH=ppc64 REPO=linux-next
+      if: type = cron
     - name: "ARCH=ppc64le LD=ld.lld REPO=linux-next"
       env: ARCH=ppc64le LD=ld.lld-9 REPO=linux-next
       if: type = cron
@@ -115,6 +120,9 @@ matrix:
     - name: "ARCH=ppc32 LLVM_VERSION=8"
       env: ARCH=ppc32 LLVM_VERSION=8
       if: type = cron
+    - name: "ARCH=ppc64 REPO=linux-next LLVM_VERSION=8"
+      env: ARCH=ppc64 REPO=linux-next LLVM_VERSION=8
+      if: type = cron
     - name: "ARCH=ppc64le LLVM_VERSION=8"
       env: ARCH=ppc64le LLVM_VERSION=8
       if: type = cron

buildroot/ppc64.config

@@ -0,0 +1,15 @@
+BR2_powerpc64=y
+BR2_CCACHE=y
+BR2_KERNEL_HEADERS_4_4=y
+BR2_BINUTILS_VERSION_2_31_X=y
+BR2_GCC_VERSION_8_X=y
+BR2_TARGET_GENERIC_ROOT_PASSWD="root"
+BR2_SYSTEM_BIN_SH_BASH=y
+BR2_TARGET_GENERIC_GETTY_PORT="hvc0"
+BR2_ROOTFS_OVERLAY="../overlay-poweroff"
+BR2_PACKAGE_BUSYBOX_SHOW_OTHERS=y
+BR2_TARGET_ROOTFS_CPIO=y
+BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT2_4=y
+BR2_TARGET_ROOTFS_EXT2_SIZE="20M"
+# BR2_TARGET_ROOTFS_TAR is not set

buildroot/rebuild.sh

@@ -25,7 +25,7 @@ CONFIGS=()
 while (( ${#} )); do
     case ${1} in
         all) for CONFIG in *.config; do CONFIGS+=( "../${CONFIG}" ); done ;;
-        arm64|arm|mipsel|ppc32|ppc64le|x86_64) CONFIGS+=( "../${1}.config" ) ;;
+        arm64|arm|mipsel|ppc32|ppc64|ppc64le|x86_64) CONFIGS+=( "../${1}.config" ) ;;
         *) echo "Unknown parameter '${1}', exiting!"; exit 1 ;;
     esac
     shift

driver.sh

@@ -112,6 +112,17 @@ setup_variables() {
       export ARCH=powerpc
       export CROSS_COMPILE=powerpc-linux-gnu- ;;
 
+    "ppc64")
+      config=pseries_defconfig
+      qemu="qemu-system-ppc64"
+      image_name=vmlinux
+      qemu_ram=1G
+      qemu_cmdline=( -machine pseries
+                     -vga none
+                     -initrd "images/ppc64/rootfs.cpio" )
+      export ARCH=powerpc
+      export CROSS_COMPILE=powerpc64-linux-gnu- ;;
+
     "ppc64le")
       config=powernv_defconfig
       image_name=zImage.epapr

images/ppc64/rootfs.cpio

@@ -0,0 +1,46 @@
+From 959a7892b40ce6553827343b1d25a0aad507b467 Mon Sep 17 00:00:00 2001
+From: Daniel Axtens <dja@axtens.net>
+Date: Thu, 10 Jan 2019 12:42:58 +1100
+Subject: [PATCH] powerpc/vdso32: Drop -mabi=elfv1 for 32 bit objects
+
+All 64-bit objects need to specify the flag to be compiled correctly, we
+just don't need it for 32-bit objects. GCC just ignored it, but clang
+doesn't.
+
+Link: https://github.com/ClangBuiltLinux/linux/issues/240
+Signed-off-by: Daniel Axtens <dja@axtens.net>
+Signed-off-by: Joel Stanley <joel@jms.id.au>
+(am from https://lore.kernel.org/linuxppc-dev/20190110014258.20963-1-joel@jms.id.au/)
+Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
+---
+ arch/powerpc/kernel/vdso32/Makefile | 14 ++++++++++++++
+ 1 file changed, 14 insertions(+)
+
+diff --git a/arch/powerpc/kernel/vdso32/Makefile b/arch/powerpc/kernel/vdso32/Makefile
+index 06f54d947057..d50978ec2ee5 100644
+--- a/arch/powerpc/kernel/vdso32/Makefile
++++ b/arch/powerpc/kernel/vdso32/Makefile
+@@ -34,6 +34,20 @@ obj-y += vdso32_wrapper.o
+ extra-y += vdso32.lds
+ CPPFLAGS_vdso32.lds += -P -C -Upowerpc
+ 
++# clang refuses to accept -mabi=elfv1 for when using the
++# 64-bit target in 32-bit mode
++ifdef CONFIG_CC_IS_CLANG
++ifdef CONFIG_PPC64
++AFLAGS_REMOVE_getcpu.o += -mabi=elfv1
++endif
++AFLAGS_REMOVE_sigtramp.o += -mabi=elfv1
++AFLAGS_REMOVE_gettimeofday.o += -mabi=elfv1
++AFLAGS_REMOVE_datapage.o += -mabi=elfv1
++AFLAGS_REMOVE_cacheflush.o += -mabi=elfv1
++AFLAGS_REMOVE_note.o += -mabi=elfv1
++endif
++
++
+ # Force dependency (incbin is bad)
+ $(obj)/vdso32_wrapper.o : $(obj)/vdso32.so
+ 
+-- 
+2.22.0
+