[PATCH v3 30/31] arm64: Build infrastructure

From: Catalin Marinas
Date: Fri Sep 07 2012 - 12:30:21 EST

This patch adds Makefile and Kconfig files required for building an
AArch64 kernel.

Signed-off-by: Will Deacon <will.deacon@xxxxxxx>
Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx>
Acked-by: Tony Lindgren <tony@xxxxxxxxxxx>
---
arch/arm64/Kconfig | 222 +++++++++++++++++++++++++++++++++++++++
arch/arm64/Kconfig.debug | 27 +++++
arch/arm64/Makefile | 71 +++++++++++++
arch/arm64/boot/.gitignore | 2 +
arch/arm64/boot/Makefile | 36 +++++++
arch/arm64/boot/install.sh | 46 ++++++++
arch/arm64/configs/defconfig | 85 +++++++++++++++
arch/arm64/include/asm/prom.h | 1 +
arch/arm64/kernel/.gitignore | 1 +
arch/arm64/kernel/Makefile | 27 +++++
arch/arm64/kernel/vmlinux.lds.S | 126 ++++++++++++++++++++++
arch/arm64/mm/Makefile | 4 +
init/Kconfig | 3 +-
lib/Kconfig.debug | 6 +-
14 files changed, 654 insertions(+), 3 deletions(-)
create mode 100644 arch/arm64/Kconfig
create mode 100644 arch/arm64/Kconfig.debug
create mode 100644 arch/arm64/Makefile
create mode 100644 arch/arm64/boot/.gitignore
create mode 100644 arch/arm64/boot/Makefile
create mode 100644 arch/arm64/boot/install.sh
create mode 100644 arch/arm64/configs/defconfig
create mode 100644 arch/arm64/include/asm/prom.h
create mode 100644 arch/arm64/kernel/.gitignore
create mode 100644 arch/arm64/kernel/Makefile
create mode 100644 arch/arm64/kernel/vmlinux.lds.S
create mode 100644 arch/arm64/mm/Makefile

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
new file mode 100644
index 0000000..767ba56
--- /dev/null
+++ b/arch/arm64/Kconfig
@@ -0,0 +1,222 @@
+config ARM64
+ def_bool y
+ select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
+ select GENERIC_CLOCKEVENTS
+ select GENERIC_HARDIRQS_NO_DEPRECATED
+ select GENERIC_IOMAP
+ select GENERIC_IRQ_PROBE
+ select GENERIC_IRQ_SHOW
+ select GENERIC_SMP_IDLE_THREAD
+ select GENERIC_TIME_VSYSCALL
+ select HARDIRQS_SW_RESEND
+ select HAVE_ARCH_TRACEHOOK
+ select HAVE_DMA_API_DEBUG
+ select HAVE_DMA_ATTRS
+ select HAVE_GENERIC_DMA_COHERENT
+ select HAVE_GENERIC_HARDIRQS
+ select HAVE_HW_BREAKPOINT if PERF_EVENTS
+ select HAVE_IRQ_WORK
+ select HAVE_MEMBLOCK
+ select HAVE_PERF_EVENTS
+ select HAVE_SPARSE_IRQ
+ select IRQ_DOMAIN
+ select NO_BOOTMEM
+ select OF
+ select OF_EARLY_FLATTREE
+ select PERF_USE_VMALLOC
+ select RTC_LIB
+ select SPARSE_IRQ
+ help
+ ARM 64-bit (AArch64) Linux support.
+
+config 64BIT
+ def_bool y
+
+config ARCH_PHYS_ADDR_T_64BIT
+ def_bool y
+
+config MMU
+ def_bool y
+
+config NO_IOPORT
+ def_bool y
+
+config STACKTRACE_SUPPORT
+ def_bool y
+
+config LOCKDEP_SUPPORT
+ def_bool y
+
+config TRACE_IRQFLAGS_SUPPORT
+ def_bool y
+
+config GENERIC_LOCKBREAK
+ def_bool y
+ depends on SMP && PREEMPT
+
+config RWSEM_GENERIC_SPINLOCK
+ def_bool y
+
+config GENERIC_HWEIGHT
+ def_bool y
+
+config GENERIC_CSUM
+ def_bool y
+
+config GENERIC_CALIBRATE_DELAY
+ def_bool y
+
+config ZONE_DMA32
+ def_bool y
+
+config ARCH_DMA_ADDR_T_64BIT
+ def_bool y
+
+config NEED_DMA_MAP_STATE
+ def_bool y
+
+config NEED_SG_DMA_LENGTH
+ def_bool y
+
+config SWIOTLB
+ def_bool y
+
+config IOMMU_HELPER
+ def_bool SWIOTLB
+
+source "init/Kconfig"
+
+source "kernel/Kconfig.freezer"
+
+menu "System Type"
+
+endmenu
+
+menu "Bus support"
+
+config ARM_AMBA
+ bool
+
+endmenu
+
+menu "Kernel Features"
+
+source "kernel/time/Kconfig"
+
+config ARM64_64K_PAGES
+ bool "Enable 64KB pages support"
+ help
+ This feature enables 64KB pages support (4KB by default)
+ allowing only two levels of page tables and faster TLB
+ look-up. AArch32 emulation is not available when this feature
+ is enabled.
+
+config SMP
+ bool "Symmetric Multi-Processing"
+ select USE_GENERIC_SMP_HELPERS
+ help
+ This enables support for systems with more than one CPU. If
+ you say N here, the kernel will run on single and
+ multiprocessor machines, but will use only one CPU of a
+ multiprocessor machine. If you say Y here, the kernel will run
+ on many, but not all, single processor machines. On a single
+ processor machine, the kernel will run faster if you say N
+ here.
+
+ If you don't know what to do here, say N.
+
+config NR_CPUS
+ int "Maximum number of CPUs (2-32)"
+ range 2 32
+ depends on SMP
+ default "4"
+
+source kernel/Kconfig.preempt
+
+config HZ
+ int
+ default 100
+
+config ARCH_HAS_HOLES_MEMORYMODEL
+ def_bool y if SPARSEMEM
+
+config ARCH_SPARSEMEM_ENABLE
+ def_bool y
+ select SPARSEMEM_VMEMMAP_ENABLE
+
+config ARCH_SPARSEMEM_DEFAULT
+ def_bool ARCH_SPARSEMEM_ENABLE
+
+config ARCH_SELECT_MEMORY_MODEL
+ def_bool ARCH_SPARSEMEM_ENABLE
+
+config HAVE_ARCH_PFN_VALID
+ def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
+
+config HW_PERF_EVENTS
+ bool "Enable hardware performance counter support for perf events"
+ depends on PERF_EVENTS
+ default y
+ help
+ Enable hardware performance counter support for perf events. If
+ disabled, perf events will use software events only.
+
+source "mm/Kconfig"
+
+endmenu
+
+menu "Boot options"
+
+config CMDLINE
+ string "Default kernel command string"
+ default ""
+ help
+ Provide a set of default command-line options at build time by
+ entering them here. As a minimum, you should specify the the
+ root device (e.g. root=/dev/nfs).
+
+config CMDLINE_FORCE
+ bool "Always use the default kernel command string"
+ help
+ Always use the default kernel command string, even if the boot
+ loader passes other arguments to the kernel.
+ This is useful if you cannot or don't want to change the
+ command-line options your boot loader passes to the kernel.
+
+endmenu
+
+menu "Userspace binary formats"
+
+source "fs/Kconfig.binfmt"
+
+config COMPAT
+ bool "Kernel support for 32-bit EL0"
+ depends on !ARM64_64K_PAGES
+ select COMPAT_BINFMT_ELF
+ help
+ This option enables support for a 32-bit EL0 running under a 64-bit
+ kernel at EL1. AArch32-specific components such as system calls,
+ the user helper functions, VFP support and the ptrace interface are
+ handled appropriately by the kernel.
+
+ If you want to execute 32-bit userspace applications, say Y.
+
+config SYSVIPC_COMPAT
+ def_bool y
+ depends on COMPAT && SYSVIPC
+
+endmenu
+
+source "net/Kconfig"
+
+source "drivers/Kconfig"
+
+source "fs/Kconfig"
+
+source "arch/arm64/Kconfig.debug"
+
+source "security/Kconfig"
+
+source "crypto/Kconfig"
+
+source "lib/Kconfig"
diff --git a/arch/arm64/Kconfig.debug b/arch/arm64/Kconfig.debug
new file mode 100644
index 0000000..d7553f2
--- /dev/null
+++ b/arch/arm64/Kconfig.debug
@@ -0,0 +1,27 @@
+menu "Kernel hacking"
+
+source "lib/Kconfig.debug"
+
+config FRAME_POINTER
+ bool
+ default y
+
+config DEBUG_ERRORS
+ bool "Verbose kernel error messages"
+ depends on DEBUG_KERNEL
+ help
+ This option controls verbose debugging information which can be
+ printed when the kernel detects an internal error. This debugging
+ information is useful to kernel hackers when tracking down problems,
+ but mostly meaningless to other people. It's safe to say Y unless
+ you are concerned with the code size or don't want to see these
+ messages.
+
+config DEBUG_STACK_USAGE
+ bool "Enable stack utilization instrumentation"
+ depends on DEBUG_KERNEL
+ help
+ Enables the display of the minimum amount of free stack which each
+ task has ever had available in the sysrq-T output.
+
+endmenu
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
new file mode 100644
index 0000000..364191f
--- /dev/null
+++ b/arch/arm64/Makefile
@@ -0,0 +1,71 @@
+#
+# arch/arm64/Makefile
+#
+# This file is included by the global makefile so that you can add your own
+# architecture-specific flags and dependencies.
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License. See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+# Copyright (C) 1995-2001 by Russell King
+
+LDFLAGS_vmlinux :=-p --no-undefined -X
+CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET)
+OBJCOPYFLAGS :=-O binary -R .note -R .note.gnu.build-id -R .comment -S
+GZFLAGS :=-9
+
+LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
+
+KBUILD_DEFCONFIG := defconfig
+
+KBUILD_CFLAGS += -mgeneral-regs-only
+KBUILD_CPPFLAGS += -mlittle-endian
+AS += -EL
+LD += -EL
+
+comma = ,
+
+CHECKFLAGS += -D__aarch64__
+
+# Default value
+head-y := arch/arm64/kernel/head.o
+
+# The byte offset of the kernel image in RAM from the start of RAM.
+TEXT_OFFSET := 0x00080000
+
+export TEXT_OFFSET GZFLAGS
+
+core-y += arch/arm64/kernel/ arch/arm64/mm/
+libs-y := arch/arm64/lib/ $(libs-y)
+libs-y += $(LIBGCC)
+
+# Default target when executing plain make
+KBUILD_IMAGE := Image.gz
+
+all: $(KBUILD_IMAGE)
+
+boot := arch/arm64/boot
+
+Image Image.gz: vmlinux
+ $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@
+
+zinstall install: vmlinux
+ $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $@
+
+%.dtb:
+ $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@
+
+# We use MRPROPER_FILES and CLEAN_FILES now
+archclean:
+ $(Q)$(MAKE) $(clean)=$(boot)
+
+define archhelp
+ echo '* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)'
+ echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
+ echo ' install - Install uncompressed kernel'
+ echo ' zinstall - Install compressed kernel'
+ echo ' Install using (your) ~/bin/installkernel or'
+ echo ' (distribution) /sbin/installkernel or'
+ echo ' install to $$(INSTALL_PATH) and run lilo'
+endef
diff --git a/arch/arm64/boot/.gitignore b/arch/arm64/boot/.gitignore
new file mode 100644
index 0000000..8dab0bb
--- /dev/null
+++ b/arch/arm64/boot/.gitignore
@@ -0,0 +1,2 @@
+Image
+Image.gz
diff --git a/arch/arm64/boot/Makefile b/arch/arm64/boot/Makefile
new file mode 100644
index 0000000..eca209b
--- /dev/null
+++ b/arch/arm64/boot/Makefile
@@ -0,0 +1,36 @@
+#
+# arch/arm64/boot/Makefile
+#
+# This file is included by the global makefile so that you can add your own
+# architecture-specific flags and dependencies.
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License. See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+# Copyright (C) 2012, ARM Ltd.
+# Author: Will Deacon <will.deacon@xxxxxxx>
+#
+# Based on the ia64 boot/Makefile.
+#
+
+targets := Image Image.gz
+
+$(obj)/Image: vmlinux FORCE
+ $(call if_changed,objcopy)
+
+$(obj)/Image.gz: $(obj)/Image FORCE
+ $(call if_changed,gzip)
+
+$(obj)/%.dtb: $(src)/dts/%.dts
+ $(call cmd,dtc)
+
+install: $(obj)/Image
+ $(CONFIG_SHELL) $(srctree)/$(src)/install.sh $(KERNELRELEASE) \
+ $(obj)/Image System.map "$(INSTALL_PATH)"
+
+zinstall: $(obj)/Image.gz
+ $(CONFIG_SHELL) $(srctree)/$(src)/install.sh $(KERNELRELEASE) \
+ $(obj)/Image.gz System.map "$(INSTALL_PATH)"
+
+clean-files += *.dtb
diff --git a/arch/arm64/boot/install.sh b/arch/arm64/boot/install.sh
new file mode 100644
index 0000000..12ed78a
--- /dev/null
+++ b/arch/arm64/boot/install.sh
@@ -0,0 +1,46 @@
+#!/bin/sh
+#
+# arch/arm64/boot/install.sh
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License. See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+# Copyright (C) 1995 by Linus Torvalds
+#
+# Adapted from code in arch/i386/boot/Makefile by H. Peter Anvin
+# Adapted from code in arch/i386/boot/install.sh by Russell King
+#
+# "make install" script for the AArch64 Linux port
+#
+# Arguments:
+# $1 - kernel version
+# $2 - kernel image file
+# $3 - kernel map file
+# $4 - default install path (blank if root directory)
+#
+
+# User may have a custom install script
+if [ -x ~/bin/${INSTALLKERNEL} ]; then exec ~/bin/${INSTALLKERNEL} "$@"; fi
+if [ -x /sbin/${INSTALLKERNEL} ]; then exec /sbin/${INSTALLKERNEL} "$@"; fi
+
+if [ "$(basename $2)" = "Image.gz" ]; then
+# Compressed install
+ echo "Installing compressed kernel"
+ base=vmlinuz
+else
+# Normal install
+ echo "Installing normal kernel"
+ base=vmlinux
+fi
+
+if [ -f $4/$base-$1 ]; then
+ mv $4/$base-$1 $4/$base-$1.old
+fi
+cat $2 > $4/$base-$1
+
+# Install system map file
+if [ -f $4/System.map-$1 ]; then
+ mv $4/System.map-$1 $4/System.map-$1.old
+fi
+cp $3 $4/System.map-$1
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
new file mode 100644
index 0000000..9212c78
--- /dev/null
+++ b/arch/arm64/configs/defconfig
@@ -0,0 +1,85 @@
+CONFIG_EXPERIMENTAL=y
+# CONFIG_LOCALVERSION_AUTO is not set
+# CONFIG_SWAP is not set
+CONFIG_SYSVIPC=y
+CONFIG_POSIX_MQUEUE=y
+CONFIG_BSD_PROCESS_ACCT=y
+CONFIG_BSD_PROCESS_ACCT_V3=y
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_IKCONFIG=y
+CONFIG_IKCONFIG_PROC=y
+CONFIG_LOG_BUF_SHIFT=14
+# CONFIG_UTS_NS is not set
+# CONFIG_IPC_NS is not set
+# CONFIG_PID_NS is not set
+# CONFIG_NET_NS is not set
+CONFIG_SCHED_AUTOGROUP=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_KALLSYMS_ALL=y
+# CONFIG_COMPAT_BRK is not set
+CONFIG_PROFILING=y
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+# CONFIG_BLK_DEV_BSG is not set
+# CONFIG_IOSCHED_DEADLINE is not set
+CONFIG_SMP=y
+CONFIG_PREEMPT_VOLUNTARY=y
+CONFIG_CMDLINE="console=ttyAMA0"
+# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
+CONFIG_COMPAT=y
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+# CONFIG_INET_LRO is not set
+# CONFIG_IPV6 is not set
+# CONFIG_WIRELESS is not set
+CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
+CONFIG_DEVTMPFS=y
+# CONFIG_BLK_DEV is not set
+CONFIG_SCSI=y
+# CONFIG_SCSI_PROC_FS is not set
+CONFIG_BLK_DEV_SD=y
+# CONFIG_SCSI_LOWLEVEL is not set
+CONFIG_NETDEVICES=y
+CONFIG_MII=y
+# CONFIG_WLAN is not set
+CONFIG_INPUT_EVDEV=y
+# CONFIG_SERIO_I8042 is not set
+# CONFIG_SERIO_SERPORT is not set
+CONFIG_LEGACY_PTY_COUNT=16
+# CONFIG_HW_RANDOM is not set
+# CONFIG_HWMON is not set
+CONFIG_FB=y
+# CONFIG_VGA_CONSOLE is not set
+CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_LOGO=y
+# CONFIG_LOGO_LINUX_MONO is not set
+# CONFIG_LOGO_LINUX_VGA16 is not set
+# CONFIG_USB_SUPPORT is not set
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_EXT2_FS=y
+CONFIG_EXT3_FS=y
+# CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set
+# CONFIG_EXT3_FS_XATTR is not set
+CONFIG_FUSE_FS=y
+CONFIG_CUSE=y
+CONFIG_VFAT_FS=y
+CONFIG_TMPFS=y
+# CONFIG_MISC_FILESYSTEMS is not set
+CONFIG_NFS_FS=y
+CONFIG_ROOT_NFS=y
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_DEBUG_FS=y
+CONFIG_DEBUG_KERNEL=y
+# CONFIG_SCHED_DEBUG is not set
+CONFIG_DEBUG_INFO=y
+# CONFIG_FTRACE is not set
+CONFIG_ATOMIC64_SELFTEST=y
+CONFIG_DEBUG_ERRORS=y
diff --git a/arch/arm64/include/asm/prom.h b/arch/arm64/include/asm/prom.h
new file mode 100644
index 0000000..68b90e6
--- /dev/null
+++ b/arch/arm64/include/asm/prom.h
@@ -0,0 +1 @@
+/* Empty for now */
diff --git a/arch/arm64/kernel/.gitignore b/arch/arm64/kernel/.gitignore
new file mode 100644
index 0000000..c5f676c
--- /dev/null
+++ b/arch/arm64/kernel/.gitignore
@@ -0,0 +1 @@
+vmlinux.lds
diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
new file mode 100644
index 0000000..e2caff1
--- /dev/null
+++ b/arch/arm64/kernel/Makefile
@@ -0,0 +1,27 @@
+#
+# Makefile for the linux kernel.
+#
+
+CPPFLAGS_vmlinux.lds := -DTEXT_OFFSET=$(TEXT_OFFSET)
+AFLAGS_head.o := -DTEXT_OFFSET=$(TEXT_OFFSET)
+
+# Object file lists.
+arm64-obj-y := cputable.o debug-monitors.o entry.o irq.o fpsimd.o \
+ entry-fpsimd.o process.o ptrace.o setup.o signal.o \
+ sys.o stacktrace.o time.o traps.o io.o vdso.o
+
+arm64-obj-$(CONFIG_COMPAT) += sys32.o kuser32.o signal32.o \
+ sys_compat.o
+arm64-obj-$(CONFIG_MODULES) += arm64ksyms.o module.o
+arm64-obj-$(CONFIG_SMP) += smp.o
+arm64-obj-$(CONFIG_HW_PERF_EVENTS) += perf_event.o
+arm64-obj-$(CONFIG_HAVE_HW_BREAKPOINT)+= hw_breakpoint.o
+
+obj-y += $(arm64-obj-y) vdso/
+obj-m += $(arm64-obj-m)
+head-y := head.o
+extra-y := $(head-y) vmlinux.lds
+
+# vDSO - this must be built first to generate the symbol offsets
+$(call objectify,$(arm64-obj-y)): $(obj)/vdso/vdso-offsets.h
+$(obj)/vdso/vdso-offsets.h: $(obj)/vdso
diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S
new file mode 100644
index 0000000..3fae2be
--- /dev/null
+++ b/arch/arm64/kernel/vmlinux.lds.S
@@ -0,0 +1,126 @@
+/*
+ * ld script to make ARM Linux kernel
+ * taken from the i386 version by Russell King
+ * Written by Martin Mares <mj@xxxxxxxxxxxxxxxxxxxxxxxx>
+ */
+
+#include <asm-generic/vmlinux.lds.h>
+#include <asm/thread_info.h>
+#include <asm/memory.h>
+#include <asm/page.h>
+
+#define ARM_EXIT_KEEP(x)
+#define ARM_EXIT_DISCARD(x) x
+
+OUTPUT_ARCH(aarch64)
+ENTRY(stext)
+
+jiffies = jiffies_64;
+
+SECTIONS
+{
+ /*
+ * XXX: The linker does not define how output sections are
+ * assigned to input sections when there are multiple statements
+ * matching the same input section name. There is no documented
+ * order of matching.
+ */
+ /DISCARD/ : {
+ ARM_EXIT_DISCARD(EXIT_TEXT)
+ ARM_EXIT_DISCARD(EXIT_DATA)
+ EXIT_CALL
+ *(.discard)
+ *(.discard.*)
+ }
+
+ . = PAGE_OFFSET + TEXT_OFFSET;
+
+ .head.text : {
+ _text = .;
+ HEAD_TEXT
+ }
+ .text : { /* Real text segment */
+ _stext = .; /* Text and read-only data */
+ *(.smp.pen.text)
+ __exception_text_start = .;
+ *(.exception.text)
+ __exception_text_end = .;
+ IRQENTRY_TEXT
+ TEXT_TEXT
+ SCHED_TEXT
+ LOCK_TEXT
+ *(.fixup)
+ *(.gnu.warning)
+ . = ALIGN(16);
+ *(.got) /* Global offset table */
+ }
+
+ RO_DATA(PAGE_SIZE)
+
+ _etext = .; /* End of text and rodata section */
+
+ . = ALIGN(PAGE_SIZE);
+ __init_begin = .;
+
+ INIT_TEXT_SECTION(8)
+ .exit.text : {
+ ARM_EXIT_KEEP(EXIT_TEXT)
+ }
+ . = ALIGN(16);
+ .init.data : {
+ INIT_DATA
+ INIT_SETUP(16)
+ INIT_CALLS
+ CON_INITCALL
+ SECURITY_INITCALL
+ INIT_RAM_FS
+ }
+ .exit.data : {
+ ARM_EXIT_KEEP(EXIT_DATA)
+ }
+
+ PERCPU_SECTION(64)
+
+ __init_end = .;
+ . = ALIGN(THREAD_SIZE);
+ __data_loc = .;
+
+ .data : AT(__data_loc) {
+ _data = .; /* address in memory */
+ _sdata = .;
+
+ /*
+ * first, the init task union, aligned
+ * to an 8192 byte boundary.
+ */
+ INIT_TASK_DATA(THREAD_SIZE)
+ NOSAVE_DATA
+ CACHELINE_ALIGNED_DATA(64)
+ READ_MOSTLY_DATA(64)
+
+ /*
+ * The exception fixup table (might need resorting at runtime)
+ */
+ . = ALIGN(32);
+ __start___ex_table = .;
+ *(__ex_table)
+ __stop___ex_table = .;
+
+ /*
+ * and the usual data section
+ */
+ DATA_DATA
+ CONSTRUCTORS
+
+ _edata = .;
+ }
+ _edata_loc = __data_loc + SIZEOF(.data);
+
+ NOTES
+
+ BSS_SECTION(0, 0, 0)
+ _end = .;
+
+ STABS_DEBUG
+ .comment 0 : { *(.comment) }
+}
diff --git a/arch/arm64/mm/Makefile b/arch/arm64/mm/Makefile
new file mode 100644
index 0000000..3140a2a
--- /dev/null
+++ b/arch/arm64/mm/Makefile
@@ -0,0 +1,4 @@
+obj-y := dma-mapping.o extable.o fault.o init.o \
+ cache.o copypage.o flush.o \
+ ioremap.o mmap.o pgd.o mmu.o \
+ context.o tlb.o proc.o
diff --git a/init/Kconfig b/init/Kconfig
index af6c7f8..8bfda46 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1153,7 +1153,8 @@ menuconfig EXPERT

config UID16
bool "Enable 16-bit UID system calls" if EXPERT
- depends on ARM || BLACKFIN || CRIS || FRV || H8300 || X86_32 || M68K || (S390 && !64BIT) || SUPERH || SPARC32 || (SPARC64 && COMPAT) || UML || (X86_64 && IA32_EMULATION)
+ depends on ARM || BLACKFIN || CRIS || FRV || H8300 || X86_32 || M68K || (S390 && !64BIT) || SUPERH || SPARC32 || (SPARC64 && COMPAT) || UML || (X86_64 && IA32_EMULATION) \
+ || AARCH32_EMULATION
default y
help
This enables the legacy 16-bit UID syscall wrappers.
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 2403a63..cfb4578 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -452,7 +452,8 @@ config SLUB_STATS
config DEBUG_KMEMLEAK
bool "Kernel memory leak detector"
depends on DEBUG_KERNEL && EXPERIMENTAL && \
- (X86 || ARM || PPC || MIPS || S390 || SPARC64 || SUPERH || MICROBLAZE || TILE)
+ (X86 || ARM || PPC || MIPS || S390 || SPARC64 || SUPERH || \
+ MICROBLAZE || TILE || ARM64)

select DEBUG_FS
select STACKTRACE if STACKTRACE_SUPPORT
@@ -739,7 +740,8 @@ config DEBUG_BUGVERBOSE
bool "Verbose BUG() reporting (adds 70K)" if DEBUG_KERNEL && EXPERT
depends on BUG
depends on ARM || AVR32 || M32R || M68K || SPARC32 || SPARC64 || \
- FRV || SUPERH || GENERIC_BUG || BLACKFIN || MN10300 || TILE
+ FRV || SUPERH || GENERIC_BUG || BLACKFIN || MN10300 || \
+ TILE || ARM64
default y
help
Say Y here to make BUG() panics output the file name and line number

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