From 6be4d32b26c0ff5603edb3067c18bbb96ddb302d Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Tue, 25 Sep 2018 22:42:13 +0200
Subject: qemu: support more arm big endian platforms

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
---
 src/tests/qemu/Makefile               | 30 ++++++++++++++++++++++++++----
 src/tests/qemu/arch/aarch64_be.config |  5 +++++
 src/tests/qemu/arch/armeb.config      | 12 ++++++++++++
 src/tests/qemu/arch/i386.config       |  4 ----
 src/tests/qemu/arch/i686.config       |  4 ++++
 src/tests/qemu/arch/powerpc.config    |  9 +++++++++
 src/tests/qemu/arch/ppc.config        |  9 ---------
 7 files changed, 56 insertions(+), 17 deletions(-)
 create mode 100644 src/tests/qemu/arch/aarch64_be.config
 create mode 100644 src/tests/qemu/arch/armeb.config
 delete mode 100644 src/tests/qemu/arch/i386.config
 create mode 100644 src/tests/qemu/arch/i686.config
 create mode 100644 src/tests/qemu/arch/powerpc.config
 delete mode 100644 src/tests/qemu/arch/ppc.config

diff --git a/src/tests/qemu/Makefile b/src/tests/qemu/Makefile
index 88ed0f5..9d4bfe9 100644
--- a/src/tests/qemu/Makefile
+++ b/src/tests/qemu/Makefile
@@ -60,6 +60,7 @@ $(eval $(call tar_download,NMAP,nmap,7.60,.tar.bz2,https://nmap.org/dist/))
 $(eval $(call tar_download,IPUTILS,iputils,s20161105,.tar.gz,https://github.com/iputils/iputils/archive/s20161105.tar.gz/#))
 
 export CFLAGS ?= -O3 -pipe
+export LDFLAGS ?=
 export CPPFLAGS := -I$(BUILD_PATH)/include
 
 ifeq ($(CHOST),$(CBUILD))
@@ -86,6 +87,16 @@ else
 QEMU_MACHINE := -cpu cortex-a53 -machine virt
 CFLAGS += -march=armv8-a -mtune=cortex-a53
 endif
+else ifeq ($(ARCH),aarch64_be)
+QEMU_ARCH := aarch64
+KERNEL_ARCH := arm64
+KERNEL_BZIMAGE := $(KERNEL_PATH)/arch/arm64/boot/Image
+ifeq ($(CHOST),$(CBUILD))
+QEMU_MACHINE := -cpu host -machine virt,gic_version=host,accel=kvm
+else
+QEMU_MACHINE := -cpu cortex-a53 -machine virt
+CFLAGS += -march=armv8-a -mtune=cortex-a53
+endif
 else ifeq ($(ARCH),arm)
 QEMU_ARCH := arm
 KERNEL_ARCH := arm
@@ -96,6 +107,17 @@ else
 QEMU_MACHINE := -cpu cortex-a15 -machine virt
 CFLAGS += -march=armv7-a -mtune=cortex-a15 -mabi=aapcs-linux
 endif
+else ifeq ($(ARCH),armeb)
+QEMU_ARCH := arm
+KERNEL_ARCH := arm
+KERNEL_BZIMAGE := $(KERNEL_PATH)/arch/arm/boot/zImage
+ifeq ($(CHOST),$(CBUILD))
+QEMU_MACHINE := -cpu host -machine virt,gic_version=host,accel=kvm
+else
+QEMU_MACHINE := -cpu cortex-a15 -machine virt
+CFLAGS += -march=armv7-a -mabi=aapcs-linux # We don't pass -mtune=cortex-a15 due to a compiler bug on big endian.
+LDFLAGS += -Wl,--be8
+endif
 else ifeq ($(ARCH),x86_64)
 QEMU_ARCH := x86_64
 KERNEL_ARCH := x86_64
@@ -171,7 +193,7 @@ QEMU_MACHINE := -machine ppce500
 endif
 CFLAGS += -mcpu=powerpc -mlong-double-64 -msecure-plt
 else
-$(error I only build: x86_64, i686, arm, aarch64, mips, mipsel, mips64, mips64el, powerpc)
+$(error I only build: x86_64, i686, arm, armeb, aarch64, aarch64_be, mips, mipsel, mips64, mips64el, powerpc)
 endif
 
 REAL_CC := $(CBUILD)-gcc
@@ -236,10 +258,10 @@ always-pull: $(KERNEL_PATH)/.installed
 $(KERNEL_BZIMAGE): always-pull
 endif
 
-$(KERNEL_PATH)/.config: kernel.config arch/$(QEMU_ARCH).config | $(KERNEL_PATH)/.installed
+$(KERNEL_PATH)/.config: kernel.config arch/$(ARCH).config | $(KERNEL_PATH)/.installed
 	cp kernel.config $(KERNEL_PATH)/minimal.config
 	printf 'CONFIG_NR_CPUS=$(NR_CPUS)\nCONFIG_INITRAMFS_SOURCE="$(BUILD_PATH)/init-cpio-spec.txt"\n' >> $(KERNEL_PATH)/minimal.config
-	cat arch/$(QEMU_ARCH).config >> $(KERNEL_PATH)/minimal.config
+	cat arch/$(ARCH).config >> $(KERNEL_PATH)/minimal.config
 	$(MAKE) -C $(KERNEL_PATH) ARCH=$(KERNEL_ARCH) allnoconfig
 	cd $(KERNEL_PATH) && ARCH=$(KERNEL_ARCH) scripts/kconfig/merge_config.sh -n .config minimal.config
 	$(if $(findstring -debug,$(KERNEL_VERSION)),cd $(KERNEL_PATH) && sed -i 's/^EXTRAVERSION =.*/EXTRAVERSION = -debug/' Makefile && ARCH=$(KERNEL_ARCH) scripts/kconfig/merge_config.sh -n .config $(PWD)/debug.config,)
@@ -297,7 +319,7 @@ $(BUILD_PATH)/tools/wg: $(TOOLS_SOURCES) | $(LIBMNL_PATH)/src/.libs/libmnl.a $(U
 
 $(BUILD_PATH)/init: init.c | $(USERSPACE_DEPS)
 	mkdir -p $(BUILD_PATH)
-	$(MUSL_CC) -o $@ $(CFLAGS) -std=gnu11 $<
+	$(MUSL_CC) -o $@ $(CFLAGS) $(LDFLAGS) -std=gnu11 $<
 	$(STRIP) -s $@
 
 $(IPUTILS_PATH)/.installed: $(IPUTILS_TAR)
diff --git a/src/tests/qemu/arch/aarch64_be.config b/src/tests/qemu/arch/aarch64_be.config
new file mode 100644
index 0000000..8dc91c2
--- /dev/null
+++ b/src/tests/qemu/arch/aarch64_be.config
@@ -0,0 +1,5 @@
+CONFIG_CPU_BIG_ENDIAN=y
+CONFIG_SERIAL_AMBA_PL011=y
+CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
+CONFIG_CMDLINE_BOOL=y
+CONFIG_CMDLINE="console=ttyAMA0 wg.success=ttyAMA1"
diff --git a/src/tests/qemu/arch/armeb.config b/src/tests/qemu/arch/armeb.config
new file mode 100644
index 0000000..b699465
--- /dev/null
+++ b/src/tests/qemu/arch/armeb.config
@@ -0,0 +1,12 @@
+CONFIG_MMU=y
+CONFIG_ARCH_MULTI_V7=y
+CONFIG_ARCH_VIRT=y
+CONFIG_THUMB2_KERNEL=n
+CONFIG_SERIAL_AMBA_PL011=y
+CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
+CONFIG_CMDLINE_BOOL=y
+CONFIG_CMDLINE="console=ttyAMA0 wg.success=ttyAMA1"
+CONFIG_CPU_BIG_ENDIAN=y
+
+# Remove me for 4.20/5.0. This is just a dirty hack to allow CPU_BIG_ENDIAN.
+CONFIG_ARCH_HIGHBANK=y
diff --git a/src/tests/qemu/arch/i386.config b/src/tests/qemu/arch/i386.config
deleted file mode 100644
index ed1e701..0000000
--- a/src/tests/qemu/arch/i386.config
+++ /dev/null
@@ -1,4 +0,0 @@
-CONFIG_SERIAL_8250=y
-CONFIG_SERIAL_8250_CONSOLE=y
-CONFIG_CMDLINE_BOOL=y
-CONFIG_CMDLINE="console=ttyS0 wg.success=ttyS1"
diff --git a/src/tests/qemu/arch/i686.config b/src/tests/qemu/arch/i686.config
new file mode 100644
index 0000000..ed1e701
--- /dev/null
+++ b/src/tests/qemu/arch/i686.config
@@ -0,0 +1,4 @@
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_CMDLINE_BOOL=y
+CONFIG_CMDLINE="console=ttyS0 wg.success=ttyS1"
diff --git a/src/tests/qemu/arch/powerpc.config b/src/tests/qemu/arch/powerpc.config
new file mode 100644
index 0000000..8ec5911
--- /dev/null
+++ b/src/tests/qemu/arch/powerpc.config
@@ -0,0 +1,9 @@
+CONFIG_PPC_QEMU_E500=y
+CONFIG_FSL_SOC_BOOKE=y
+CONFIG_PPC_85xx=y
+CONFIG_PHYS_64BIT=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_MATH_EMULATION=y
+CONFIG_CMDLINE_BOOL=y
+CONFIG_CMDLINE="console=ttyS0 wg.success=ttyS1"
diff --git a/src/tests/qemu/arch/ppc.config b/src/tests/qemu/arch/ppc.config
deleted file mode 100644
index 8ec5911..0000000
--- a/src/tests/qemu/arch/ppc.config
+++ /dev/null
@@ -1,9 +0,0 @@
-CONFIG_PPC_QEMU_E500=y
-CONFIG_FSL_SOC_BOOKE=y
-CONFIG_PPC_85xx=y
-CONFIG_PHYS_64BIT=y
-CONFIG_SERIAL_8250=y
-CONFIG_SERIAL_8250_CONSOLE=y
-CONFIG_MATH_EMULATION=y
-CONFIG_CMDLINE_BOOL=y
-CONFIG_CMDLINE="console=ttyS0 wg.success=ttyS1"
-- 
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