[PATCH v4 0/8] CFI for ARM32 using LLVM

[PATCH v4 0/8] CFI for ARM32 using LLVM

[Linus Walleij]

This is a first patch set to support CLANG CFI (Control Flow
Integrity) on ARM32.

For information about what CFI is, see:
https://clang.llvm.org/docs/ControlFlowIntegrity.html

For the kernel KCFI flavor, see:
https://lwn.net/Articles/898040/

The base changes required to bring up KCFI on ARM32 was mostly
related to the use of custom vtables in the kernel, combined
with defines to call into these vtable members directly from
sites where they are used.

We annotate all assembly calls that are called directly from
C with SYM_TYPED_FUNC_START()/SYM_FUNC_END() so it is easy
to see while reading the assembly that these functions are
called from C and can have CFI prototype information prefixed
to them.

As protype prefix information is just some random bytes, it is
not possible to "fall through" into an assembly function that
is tagged with SYM_TYPED_FUNC_START(): there will be some
binary noise in front of the function so this design pattern
needs to be explicitly avoided at each site where it occurred.

The approach to binding the calls to C is two-fold:

- Either convert the affected vtable struct to C and provide
  per-CPU prototypes for all the calls (done for TLB, cache)
  or:

- Provide prototypes in a special files just for CFI and tag
  all these functions addressable.

The permissive mode handles the new breakpoint type (0x03) that
LLVM CLANG is emitting.

To runtime-test the patches:
- Enable CONFIG_LKDTM
- echo CFI_FORWARD_PROTO > /sys/kernel/debug/provoke-crash/DIRECT

The patch set has been booted to userspace on the following
test platforms:

- Arm Versatile (QEMU)
- Arm Versatile Express (QEMU)
- multi_v7 booted on Versatile Express (QEMU)
- Footbridge Netwinder (SA110 ARMv4)
- Ux500 (ARMv7 SMP)
- Gemini (FA526)

I am not saying there will not be corner cases that we need
to fix in addition to this, but it is enough to get started.
Looking at what was fixed for arm64 I am a bit weary that
e.g. BPF might need something to trampoline properly.

But hopefullt people can get to testing it and help me fix
remaining issues before the final version, or we can fix it
in-tree.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
Changes in v4:
- Rebase on v6.9-rc1
- Use Ard's patch for converting TLB operation vtables to C
- Rewrite the cache vtables in C and use SYM_SYM_TYPED_FUNC in the
  assembly to make CFI work all the way down.
- Instead of tagging all the delay functions as __nocfi get to the
  root cause and annotate the loop delay code with SYM_TYPED_FUNC_START()
  and rewrite it using explicit branches so we get CFI all the way
  down.
- Drop the patch turning highmem page accesses into static inlines:
  this was probably a development artifact since this code does
  a lot of cache and TLB flusing, and that assembly is now properly
  annotated.
- Do not define static inlines tagged __nocfi for all the proc functions,
  instead provide proper C prototypes in a separate CFI-only file
  and make these explicitly addressable.
- Link to v3: https://lore.kernel.org/r/20240311-arm32-cfi-v3-0-224a0f0a45c2@linaro.org

Changes in v3:
- Use report_cfi_failure() like everyone else in the breakpoint
  handler.
- I think we cannot implement target and type for the report callback
  without operand bundling compiler extensions, so just leaving these as zero.
- Link to v2: https://lore.kernel.org/r/20240307-arm32-cfi-v2-0-cc74ea0306b3@linaro.org

Changes in v2:
- Add the missing ftrace graph tracer stub.
- Enable permissive mode using a breakpoint handler.
- Link to v1: https://lore.kernel.org/r/20240225-arm32-cfi-v1-0-6943306f065b@linaro.org

---
Ard Biesheuvel (1):
      ARM: mm: Make tlbflush routines CFI safe

Linus Walleij (7):
      ARM: bugs: Check in the vtable instead of defined aliases
      ARM: ftrace: Define ftrace_stub_graph
      ARM: mm: Rewrite cacheflush vtables in CFI safe C
      ARM: mm: Define prototypes for all per-processor calls
      ARM: lib: Annotate loop delay instructions for CFI
      ARM: hw_breakpoint: Handle CFI breakpoints
      ARM: Support CLANG CFI

 arch/arm/Kconfig                     |   1 +
 arch/arm/include/asm/glue-cache.h    |  28 +-
 arch/arm/include/asm/hw_breakpoint.h |   1 +
 arch/arm/kernel/bugs.c               |   2 +-
 arch/arm/kernel/entry-ftrace.S       |   4 +
 arch/arm/kernel/hw_breakpoint.c      |  30 ++
 arch/arm/lib/delay-loop.S            |  16 +-
 arch/arm/mm/Makefile                 |   3 +
 arch/arm/mm/cache-b15-rac.c          |   1 +
 arch/arm/mm/cache-fa.S               |  47 +--
 arch/arm/mm/cache-nop.S              |  57 +--
 arch/arm/mm/cache-v4.S               |  55 +--
 arch/arm/mm/cache-v4wb.S             |  47 ++-
 arch/arm/mm/cache-v4wt.S             |  55 +--
 arch/arm/mm/cache-v6.S               |  49 ++-
 arch/arm/mm/cache-v7.S               |  74 ++--
 arch/arm/mm/cache-v7m.S              |  53 ++-
 arch/arm/mm/cache.c                  | 663 +++++++++++++++++++++++++++++++++++
 arch/arm/mm/proc-arm1020.S           |  69 ++--
 arch/arm/mm/proc-arm1020e.S          |  70 ++--
 arch/arm/mm/proc-arm1022.S           |  69 ++--
 arch/arm/mm/proc-arm1026.S           |  70 ++--
 arch/arm/mm/proc-arm720.S            |  25 +-
 arch/arm/mm/proc-arm740.S            |  26 +-
 arch/arm/mm/proc-arm7tdmi.S          |  34 +-
 arch/arm/mm/proc-arm920.S            |  76 ++--
 arch/arm/mm/proc-arm922.S            |  69 ++--
 arch/arm/mm/proc-arm925.S            |  66 ++--
 arch/arm/mm/proc-arm926.S            |  75 ++--
 arch/arm/mm/proc-arm940.S            |  69 ++--
 arch/arm/mm/proc-arm946.S            |  65 ++--
 arch/arm/mm/proc-arm9tdmi.S          |  26 +-
 arch/arm/mm/proc-fa526.S             |  24 +-
 arch/arm/mm/proc-feroceon.S          | 105 +++---
 arch/arm/mm/proc-macros.S            |  33 --
 arch/arm/mm/proc-mohawk.S            |  74 ++--
 arch/arm/mm/proc-sa110.S             |  23 +-
 arch/arm/mm/proc-sa1100.S            |  31 +-
 arch/arm/mm/proc-v6.S                |  31 +-
 arch/arm/mm/proc-v7-2level.S         |   8 +-
 arch/arm/mm/proc-v7-3level.S         |   8 +-
 arch/arm/mm/proc-v7-bugs.c           |   4 +-
 arch/arm/mm/proc-v7.S                |  66 ++--
 arch/arm/mm/proc-v7m.S               |  41 +--
 arch/arm/mm/proc-xsc3.S              |  75 ++--
 arch/arm/mm/proc-xscale.S            | 127 +++----
 arch/arm/mm/proc.c                   | 500 ++++++++++++++++++++++++++
 arch/arm/mm/tlb-fa.S                 |  12 +-
 arch/arm/mm/tlb-v4.S                 |  15 +-
 arch/arm/mm/tlb-v4wb.S               |  12 +-
 arch/arm/mm/tlb-v4wbi.S              |  12 +-
 arch/arm/mm/tlb-v6.S                 |  12 +-
 arch/arm/mm/tlb-v7.S                 |  14 +-
 arch/arm/mm/tlb.c                    |  84 +++++
 54 files changed, 2334 insertions(+), 972 deletions(-)
---
base-commit: 4cece764965020c22cff7665b18a012006359095
change-id: 20240115-arm32-cfi-65d60f201108

Best regards,
-- 
Linus Walleij <linus.walleij@linaro.org>


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[PATCH v4 1/8] ARM: bugs: Check in the vtable instead of defined aliases

[Linus Walleij]

Instead of checking if cpu_check_bugs() exist, check for this
callback directly in the CPU vtable: this is better because the
function is just a define to the vtable entry and this is why
the code works. But we want to be able to specify a proper
function for cpu_check_bugs() so look into the vtable instead.

In bugs.c assign PROC_VTABLE(switch_mm) instead of
assigning cpu_do_switch_mm where again this is just a define
into the vtable: this makes it possible to make
cpu_do_switch_mm() into a real function.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 arch/arm/kernel/bugs.c     | 2 +-
 arch/arm/mm/proc-v7-bugs.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm/kernel/bugs.c b/arch/arm/kernel/bugs.c
index 087bce6ec8e9..35d39efb51ed 100644
--- a/arch/arm/kernel/bugs.c
+++ b/arch/arm/kernel/bugs.c
@@ -7,7 +7,7 @@
 void check_other_bugs(void)
 {
 #ifdef MULTI_CPU
-	if (cpu_check_bugs)
+	if (PROC_VTABLE(check_bugs))
 		cpu_check_bugs();
 #endif
 }
diff --git a/arch/arm/mm/proc-v7-bugs.c b/arch/arm/mm/proc-v7-bugs.c
index 8bc7a2d6d6c7..ea3ee2bd7b56 100644
--- a/arch/arm/mm/proc-v7-bugs.c
+++ b/arch/arm/mm/proc-v7-bugs.c
@@ -87,14 +87,14 @@ static unsigned int spectre_v2_install_workaround(unsigned int method)
 	case SPECTRE_V2_METHOD_HVC:
 		per_cpu(harden_branch_predictor_fn, cpu) =
 			call_hvc_arch_workaround_1;
-		cpu_do_switch_mm = cpu_v7_hvc_switch_mm;
+		PROC_VTABLE(switch_mm) = cpu_v7_hvc_switch_mm;
 		spectre_v2_method = "hypervisor";
 		break;
 
 	case SPECTRE_V2_METHOD_SMC:
 		per_cpu(harden_branch_predictor_fn, cpu) =
 			call_smc_arch_workaround_1;
-		cpu_do_switch_mm = cpu_v7_smc_switch_mm;
+		PROC_VTABLE(switch_mm) = cpu_v7_smc_switch_mm;
 		spectre_v2_method = "firmware";
 		break;
 	}

-- 
2.44.0


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[PATCH v4 2/8] ARM: ftrace: Define ftrace_stub_graph

[Linus Walleij]

Several architectures defines this stub for the graph tracer,
and it is needed for CFI, as it needs a separate symbol for it.
The trick from include/asm-generic/vmlinux.lds.h to define
ftrace_stub_graph to ftrace_stub isn't working when using CFI.
Commit 883bbbffa5a4 contains the details.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 arch/arm/kernel/entry-ftrace.S | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/kernel/entry-ftrace.S b/arch/arm/kernel/entry-ftrace.S
index 3e7bcaca5e07..bc598e3d8dd2 100644
--- a/arch/arm/kernel/entry-ftrace.S
+++ b/arch/arm/kernel/entry-ftrace.S
@@ -271,6 +271,10 @@ ENTRY(ftrace_stub)
 	ret	lr
 ENDPROC(ftrace_stub)
 
+ENTRY(ftrace_stub_graph)
+	ret	lr
+ENDPROC(ftrace_stub_graph)
+
 #ifdef CONFIG_DYNAMIC_FTRACE
 
 	__INIT

-- 
2.44.0


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[PATCH v4 3/8] ARM: mm: Make tlbflush routines CFI safe

[Linus Walleij]

From: Ard Biesheuvel <ardb@kernel.org>

Instead of avoiding CFI entirely on the TLB flush helpers, reorganize
the code so that the CFI machinery can deal with it. The important
things to take into account are:
- functions in asm called indirectly from C need to be defined using
  SYM_TYPED_FUNC_START()
- a reference to the asm function needs to be visible to the compiler,
  in order to get it to emit the typeid symbol.

The latter means that defining the cpu_tlb_fns structs is best done from
C code, so that the references in the static initializers will be
visible to the compiler.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 arch/arm/mm/Makefile      |  1 +
 arch/arm/mm/proc-macros.S | 15 ---------
 arch/arm/mm/tlb-fa.S      | 12 +++----
 arch/arm/mm/tlb-v4.S      | 15 +++++----
 arch/arm/mm/tlb-v4wb.S    | 12 +++----
 arch/arm/mm/tlb-v4wbi.S   | 12 +++----
 arch/arm/mm/tlb-v6.S      | 12 +++----
 arch/arm/mm/tlb-v7.S      | 14 +++-----
 arch/arm/mm/tlb.c         | 84 +++++++++++++++++++++++++++++++++++++++++++++++
 9 files changed, 119 insertions(+), 58 deletions(-)

diff --git a/arch/arm/mm/Makefile b/arch/arm/mm/Makefile
index 71b858c9b10c..cc8255fdf56e 100644
--- a/arch/arm/mm/Makefile
+++ b/arch/arm/mm/Makefile
@@ -62,6 +62,7 @@ obj-$(CONFIG_CPU_TLB_FEROCEON)	+= tlb-v4wbi.o	# reuse v4wbi TLB functions
 obj-$(CONFIG_CPU_TLB_V6)	+= tlb-v6.o
 obj-$(CONFIG_CPU_TLB_V7)	+= tlb-v7.o
 obj-$(CONFIG_CPU_TLB_FA)	+= tlb-fa.o
+obj-y				+= tlb.o
 
 obj-$(CONFIG_CPU_ARM7TDMI)	+= proc-arm7tdmi.o
 obj-$(CONFIG_CPU_ARM720T)	+= proc-arm720.o
diff --git a/arch/arm/mm/proc-macros.S b/arch/arm/mm/proc-macros.S
index e43f6d716b4b..c0acfeac3e84 100644
--- a/arch/arm/mm/proc-macros.S
+++ b/arch/arm/mm/proc-macros.S
@@ -338,21 +338,6 @@ ENTRY(\name\()_cache_fns)
 	.size	\name\()_cache_fns, . - \name\()_cache_fns
 .endm
 
-.macro define_tlb_functions name:req, flags_up:req, flags_smp
-	.type	\name\()_tlb_fns, #object
-	.align 2
-ENTRY(\name\()_tlb_fns)
-	.long	\name\()_flush_user_tlb_range
-	.long	\name\()_flush_kern_tlb_range
-	.ifnb \flags_smp
-		ALT_SMP(.long	\flags_smp )
-		ALT_UP(.long	\flags_up )
-	.else
-		.long	\flags_up
-	.endif
-	.size	\name\()_tlb_fns, . - \name\()_tlb_fns
-.endm
-
 .macro globl_equ x, y
 	.globl	\x
 	.equ	\x, \y
diff --git a/arch/arm/mm/tlb-fa.S b/arch/arm/mm/tlb-fa.S
index def6161ec452..85a6fe766b21 100644
--- a/arch/arm/mm/tlb-fa.S
+++ b/arch/arm/mm/tlb-fa.S
@@ -15,6 +15,7 @@
  */
 #include <linux/linkage.h>
 #include <linux/init.h>
+#include <linux/cfi_types.h>
 #include <asm/assembler.h>
 #include <asm/asm-offsets.h>
 #include <asm/tlbflush.h>
@@ -31,7 +32,7 @@
  *	- mm    - mm_struct describing address space
  */
 	.align	4
-ENTRY(fa_flush_user_tlb_range)
+SYM_TYPED_FUNC_START(fa_flush_user_tlb_range)
 	vma_vm_mm ip, r2
 	act_mm	r3				@ get current->active_mm
 	eors	r3, ip, r3			@ == mm ?
@@ -46,9 +47,10 @@ ENTRY(fa_flush_user_tlb_range)
 	blo	1b
 	mcr	p15, 0, r3, c7, c10, 4		@ data write barrier
 	ret	lr
+SYM_FUNC_END(fa_flush_user_tlb_range)
 
 
-ENTRY(fa_flush_kern_tlb_range)
+SYM_TYPED_FUNC_START(fa_flush_kern_tlb_range)
 	mov	r3, #0
 	mcr	p15, 0, r3, c7, c10, 4		@ drain WB
 	bic	r0, r0, #0x0ff
@@ -60,8 +62,4 @@ ENTRY(fa_flush_kern_tlb_range)
 	mcr	p15, 0, r3, c7, c10, 4		@ data write barrier
 	mcr	p15, 0, r3, c7, c5, 4		@ prefetch flush (isb)
 	ret	lr
-
-	__INITDATA
-
-	/* define struct cpu_tlb_fns (see <asm/tlbflush.h> and proc-macros.S) */
-	define_tlb_functions fa, fa_tlb_flags
+SYM_FUNC_END(fa_flush_kern_tlb_range)
diff --git a/arch/arm/mm/tlb-v4.S b/arch/arm/mm/tlb-v4.S
index b962b4e75158..09ff69008d94 100644
--- a/arch/arm/mm/tlb-v4.S
+++ b/arch/arm/mm/tlb-v4.S
@@ -11,6 +11,7 @@
  */
 #include <linux/linkage.h>
 #include <linux/init.h>
+#include <linux/cfi_types.h>
 #include <asm/assembler.h>
 #include <asm/asm-offsets.h>
 #include <asm/tlbflush.h>
@@ -27,7 +28,7 @@
  *	- mm    - mm_struct describing address space
  */
 	.align	5
-ENTRY(v4_flush_user_tlb_range)
+SYM_TYPED_FUNC_START(v4_flush_user_tlb_range)
 	vma_vm_mm ip, r2
 	act_mm	r3				@ get current->active_mm
 	eors	r3, ip, r3				@ == mm ?
@@ -40,6 +41,7 @@ ENTRY(v4_flush_user_tlb_range)
 	cmp	r0, r1
 	blo	1b
 	ret	lr
+SYM_FUNC_END(v4_flush_user_tlb_range)
 
 /*
  *	v4_flush_kern_tlb_range(start, end)
@@ -50,10 +52,11 @@ ENTRY(v4_flush_user_tlb_range)
  *	- start - virtual address (may not be aligned)
  *	- end   - virtual address (may not be aligned)
  */
+#ifdef CONFIG_CFI_CLANG
+SYM_TYPED_FUNC_START(v4_flush_kern_tlb_range)
+	b	.v4_flush_kern_tlb_range
+SYM_FUNC_END(v4_flush_kern_tlb_range)
+#else
 .globl v4_flush_kern_tlb_range
 .equ v4_flush_kern_tlb_range, .v4_flush_kern_tlb_range
-
-	__INITDATA
-
-	/* define struct cpu_tlb_fns (see <asm/tlbflush.h> and proc-macros.S) */
-	define_tlb_functions v4, v4_tlb_flags
+#endif
diff --git a/arch/arm/mm/tlb-v4wb.S b/arch/arm/mm/tlb-v4wb.S
index 9348bba7586a..04e46c359e75 100644
--- a/arch/arm/mm/tlb-v4wb.S
+++ b/arch/arm/mm/tlb-v4wb.S
@@ -11,6 +11,7 @@
  */
 #include <linux/linkage.h>
 #include <linux/init.h>
+#include <linux/cfi_types.h>
 #include <asm/assembler.h>
 #include <asm/asm-offsets.h>
 #include <asm/tlbflush.h>
@@ -27,7 +28,7 @@
  *	- mm    - mm_struct describing address space
  */
 	.align	5
-ENTRY(v4wb_flush_user_tlb_range)
+SYM_TYPED_FUNC_START(v4wb_flush_user_tlb_range)
 	vma_vm_mm ip, r2
 	act_mm	r3				@ get current->active_mm
 	eors	r3, ip, r3				@ == mm ?
@@ -43,6 +44,7 @@ ENTRY(v4wb_flush_user_tlb_range)
 	cmp	r0, r1
 	blo	1b
 	ret	lr
+SYM_FUNC_END(v4wb_flush_user_tlb_range)
 
 /*
  *	v4_flush_kern_tlb_range(start, end)
@@ -53,7 +55,7 @@ ENTRY(v4wb_flush_user_tlb_range)
  *	- start - virtual address (may not be aligned)
  *	- end   - virtual address (may not be aligned)
  */
-ENTRY(v4wb_flush_kern_tlb_range)
+SYM_TYPED_FUNC_START(v4wb_flush_kern_tlb_range)
 	mov	r3, #0
 	mcr	p15, 0, r3, c7, c10, 4		@ drain WB
 	bic	r0, r0, #0x0ff
@@ -64,8 +66,4 @@ ENTRY(v4wb_flush_kern_tlb_range)
 	cmp	r0, r1
 	blo	1b
 	ret	lr
-
-	__INITDATA
-
-	/* define struct cpu_tlb_fns (see <asm/tlbflush.h> and proc-macros.S) */
-	define_tlb_functions v4wb, v4wb_tlb_flags
+SYM_FUNC_END(v4wb_flush_kern_tlb_range)
diff --git a/arch/arm/mm/tlb-v4wbi.S b/arch/arm/mm/tlb-v4wbi.S
index d4f9040a4111..502dfe5628a3 100644
--- a/arch/arm/mm/tlb-v4wbi.S
+++ b/arch/arm/mm/tlb-v4wbi.S
@@ -11,6 +11,7 @@
  */
 #include <linux/linkage.h>
 #include <linux/init.h>
+#include <linux/cfi_types.h>
 #include <asm/assembler.h>
 #include <asm/asm-offsets.h>
 #include <asm/tlbflush.h>
@@ -26,7 +27,7 @@
  *	- mm    - mm_struct describing address space
  */
 	.align	5
-ENTRY(v4wbi_flush_user_tlb_range)
+SYM_TYPED_FUNC_START(v4wbi_flush_user_tlb_range)
 	vma_vm_mm ip, r2
 	act_mm	r3				@ get current->active_mm
 	eors	r3, ip, r3			@ == mm ?
@@ -43,8 +44,9 @@ ENTRY(v4wbi_flush_user_tlb_range)
 	cmp	r0, r1
 	blo	1b
 	ret	lr
+SYM_FUNC_END(v4wbi_flush_user_tlb_range)
 
-ENTRY(v4wbi_flush_kern_tlb_range)
+SYM_TYPED_FUNC_START(v4wbi_flush_kern_tlb_range)
 	mov	r3, #0
 	mcr	p15, 0, r3, c7, c10, 4		@ drain WB
 	bic	r0, r0, #0x0ff
@@ -55,8 +57,4 @@ ENTRY(v4wbi_flush_kern_tlb_range)
 	cmp	r0, r1
 	blo	1b
 	ret	lr
-
-	__INITDATA
-
-	/* define struct cpu_tlb_fns (see <asm/tlbflush.h> and proc-macros.S) */
-	define_tlb_functions v4wbi, v4wbi_tlb_flags
+SYM_FUNC_END(v4wbi_flush_kern_tlb_range)
diff --git a/arch/arm/mm/tlb-v6.S b/arch/arm/mm/tlb-v6.S
index 1d91e49b2c2d..8256a67ac654 100644
--- a/arch/arm/mm/tlb-v6.S
+++ b/arch/arm/mm/tlb-v6.S
@@ -9,6 +9,7 @@
  */
 #include <linux/init.h>
 #include <linux/linkage.h>
+#include <linux/cfi_types.h>
 #include <asm/asm-offsets.h>
 #include <asm/assembler.h>
 #include <asm/page.h>
@@ -32,7 +33,7 @@
  *	- the "Invalidate single entry" instruction will invalidate
  *	  both the I and the D TLBs on Harvard-style TLBs
  */
-ENTRY(v6wbi_flush_user_tlb_range)
+SYM_TYPED_FUNC_START(v6wbi_flush_user_tlb_range)
 	vma_vm_mm r3, r2			@ get vma->vm_mm
 	mov	ip, #0
 	mmid	r3, r3				@ get vm_mm->context.id
@@ -56,6 +57,7 @@ ENTRY(v6wbi_flush_user_tlb_range)
 	blo	1b
 	mcr	p15, 0, ip, c7, c10, 4		@ data synchronization barrier
 	ret	lr
+SYM_FUNC_END(v6wbi_flush_user_tlb_range)
 
 /*
  *	v6wbi_flush_kern_tlb_range(start,end)
@@ -65,7 +67,7 @@ ENTRY(v6wbi_flush_user_tlb_range)
  *	- start - start address (may not be aligned)
  *	- end   - end address (exclusive, may not be aligned)
  */
-ENTRY(v6wbi_flush_kern_tlb_range)
+SYM_TYPED_FUNC_START(v6wbi_flush_kern_tlb_range)
 	mov	r2, #0
 	mcr	p15, 0, r2, c7, c10, 4		@ drain write buffer
 	mov	r0, r0, lsr #PAGE_SHIFT		@ align address
@@ -85,8 +87,4 @@ ENTRY(v6wbi_flush_kern_tlb_range)
 	mcr	p15, 0, r2, c7, c10, 4		@ data synchronization barrier
 	mcr	p15, 0, r2, c7, c5, 4		@ prefetch flush (isb)
 	ret	lr
-
-	__INIT
-
-	/* define struct cpu_tlb_fns (see <asm/tlbflush.h> and proc-macros.S) */
-	define_tlb_functions v6wbi, v6wbi_tlb_flags
+SYM_FUNC_END(v6wbi_flush_kern_tlb_range)
diff --git a/arch/arm/mm/tlb-v7.S b/arch/arm/mm/tlb-v7.S
index 35fd6d4f0d03..f1aa0764a2cc 100644
--- a/arch/arm/mm/tlb-v7.S
+++ b/arch/arm/mm/tlb-v7.S
@@ -10,6 +10,7 @@
  */
 #include <linux/init.h>
 #include <linux/linkage.h>
+#include <linux/cfi_types.h>
 #include <asm/assembler.h>
 #include <asm/asm-offsets.h>
 #include <asm/page.h>
@@ -31,7 +32,7 @@
  *	- the "Invalidate single entry" instruction will invalidate
  *	  both the I and the D TLBs on Harvard-style TLBs
  */
-ENTRY(v7wbi_flush_user_tlb_range)
+SYM_TYPED_FUNC_START(v7wbi_flush_user_tlb_range)
 	vma_vm_mm r3, r2			@ get vma->vm_mm
 	mmid	r3, r3				@ get vm_mm->context.id
 	dsb	ish
@@ -57,7 +58,7 @@ ENTRY(v7wbi_flush_user_tlb_range)
 	blo	1b
 	dsb	ish
 	ret	lr
-ENDPROC(v7wbi_flush_user_tlb_range)
+SYM_FUNC_END(v7wbi_flush_user_tlb_range)
 
 /*
  *	v7wbi_flush_kern_tlb_range(start,end)
@@ -67,7 +68,7 @@ ENDPROC(v7wbi_flush_user_tlb_range)
  *	- start - start address (may not be aligned)
  *	- end   - end address (exclusive, may not be aligned)
  */
-ENTRY(v7wbi_flush_kern_tlb_range)
+SYM_TYPED_FUNC_START(v7wbi_flush_kern_tlb_range)
 	dsb	ish
 	mov	r0, r0, lsr #PAGE_SHIFT		@ align address
 	mov	r1, r1, lsr #PAGE_SHIFT
@@ -86,9 +87,4 @@ ENTRY(v7wbi_flush_kern_tlb_range)
 	dsb	ish
 	isb
 	ret	lr
-ENDPROC(v7wbi_flush_kern_tlb_range)
-
-	__INIT
-
-	/* define struct cpu_tlb_fns (see <asm/tlbflush.h> and proc-macros.S) */
-	define_tlb_functions v7wbi, v7wbi_tlb_flags_up, flags_smp=v7wbi_tlb_flags_smp
+SYM_FUNC_END(v7wbi_flush_kern_tlb_range)
diff --git a/arch/arm/mm/tlb.c b/arch/arm/mm/tlb.c
new file mode 100644
index 000000000000..42359793120b
--- /dev/null
+++ b/arch/arm/mm/tlb.c
@@ -0,0 +1,84 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Copyright 2024 Google LLC
+// Author: Ard Biesheuvel <ardb@google.com>
+
+#include <linux/types.h>
+#include <asm/tlbflush.h>
+
+#ifdef CONFIG_CPU_TLB_V4WT
+void v4_flush_user_tlb_range(unsigned long, unsigned long, struct vm_area_struct *);
+void v4_flush_kern_tlb_range(unsigned long, unsigned long);
+
+struct cpu_tlb_fns v4_tlb_fns __initconst = {
+	.flush_user_range	= v4_flush_user_tlb_range,
+	.flush_kern_range	= v4_flush_kern_tlb_range,
+	.tlb_flags		= v4_tlb_flags,
+};
+#endif
+
+#ifdef CONFIG_CPU_TLB_V4WB
+void v4wb_flush_user_tlb_range(unsigned long, unsigned long, struct vm_area_struct *);
+void v4wb_flush_kern_tlb_range(unsigned long, unsigned long);
+
+struct cpu_tlb_fns v4wb_tlb_fns __initconst = {
+	.flush_user_range	= v4wb_flush_user_tlb_range,
+	.flush_kern_range	= v4wb_flush_kern_tlb_range,
+	.tlb_flags		= v4wb_tlb_flags,
+};
+#endif
+
+#if defined(CONFIG_CPU_TLB_V4WBI) || defined(CONFIG_CPU_TLB_FEROCEON)
+void v4wbi_flush_user_tlb_range(unsigned long, unsigned long, struct vm_area_struct *);
+void v4wbi_flush_kern_tlb_range(unsigned long, unsigned long);
+
+struct cpu_tlb_fns v4wbi_tlb_fns __initconst = {
+	.flush_user_range	= v4wbi_flush_user_tlb_range,
+	.flush_kern_range	= v4wbi_flush_kern_tlb_range,
+	.tlb_flags		= v4wbi_tlb_flags,
+};
+#endif
+
+#ifdef CONFIG_CPU_TLB_V6
+void v6wbi_flush_user_tlb_range(unsigned long, unsigned long, struct vm_area_struct *);
+void v6wbi_flush_kern_tlb_range(unsigned long, unsigned long);
+
+struct cpu_tlb_fns v6wbi_tlb_fns __initconst = {
+	.flush_user_range	= v6wbi_flush_user_tlb_range,
+	.flush_kern_range	= v6wbi_flush_kern_tlb_range,
+	.tlb_flags		= v6wbi_tlb_flags,
+};
+#endif
+
+#ifdef CONFIG_CPU_TLB_V7
+void v7wbi_flush_user_tlb_range(unsigned long, unsigned long, struct vm_area_struct *);
+void v7wbi_flush_kern_tlb_range(unsigned long, unsigned long);
+
+struct cpu_tlb_fns v7wbi_tlb_fns __initconst = {
+	.flush_user_range	= v7wbi_flush_user_tlb_range,
+	.flush_kern_range	= v7wbi_flush_kern_tlb_range,
+	.tlb_flags		= IS_ENABLED(CONFIG_SMP) ? v7wbi_tlb_flags_smp
+							 : v7wbi_tlb_flags_up,
+};
+
+#ifdef CONFIG_SMP_ON_UP
+/* This will be run-time patched so the offset better be right */
+static_assert(offsetof(struct cpu_tlb_fns, tlb_flags) == 8);
+
+asm("	.pushsection	\".alt.smp.init\", \"a\"		\n" \
+    "	.align		2					\n" \
+    "	.long		v7wbi_tlb_fns + 8 - .			\n" \
+    "	.long "  	__stringify(v7wbi_tlb_flags_up) "	\n" \
+    "	.popsection						\n");
+#endif
+#endif
+
+#ifdef CONFIG_CPU_TLB_FA
+void fa_flush_user_tlb_range(unsigned long, unsigned long, struct vm_area_struct *);
+void fa_flush_kern_tlb_range(unsigned long, unsigned long);
+
+struct cpu_tlb_fns fa_tlb_fns __initconst = {
+	.flush_user_range	= fa_flush_user_tlb_range,
+	.flush_kern_range	= fa_flush_kern_tlb_range,
+	.tlb_flags		= fa_tlb_flags,
+};
+#endif

-- 
2.44.0


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH v4 5/8] ARM: mm: Define prototypes for all per-processor calls

[Linus Walleij]

Each CPU type ("proc") has assembly calls for initializing and
setting up the MM context, idle and so forth.

These calls have the C form of e.g.:

void cpu_arm920_init(void);

However this prototype is not really specified, instead it is
generated by the glue code in <asm/glue-proc.h> and the prototype
is implicit from the generic prototype defined in <asm/proc-fns.h>
such as cpu_proc_init() in this case. (This is a bit similar to
the "interface" or inheritance concept in other languages.)

To be able to annotate these assembly calls for CFI, they all need
to have a proper C prototype per CPU call.

Define these in a new C file that is only compiled when we use
CFI, and add __ADDRESSABLE() to each so the compiler knows that
these will be addressed (they are not explicitly called in C, they
are called by way of cpu_proc_init() etc).

It is a bit of definitions, but we do not expect new ARM32 CPUs
to appear very much so it should be pretty static.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 arch/arm/mm/Makefile         |   1 +
 arch/arm/mm/proc-arm1020.S   |  24 ++-
 arch/arm/mm/proc-arm1020e.S  |  24 ++-
 arch/arm/mm/proc-arm1022.S   |  24 ++-
 arch/arm/mm/proc-arm1026.S   |  24 ++-
 arch/arm/mm/proc-arm720.S    |  25 ++-
 arch/arm/mm/proc-arm740.S    |  26 ++-
 arch/arm/mm/proc-arm7tdmi.S  |  34 ++-
 arch/arm/mm/proc-arm920.S    |  31 +--
 arch/arm/mm/proc-arm922.S    |  23 +-
 arch/arm/mm/proc-arm925.S    |  22 +-
 arch/arm/mm/proc-arm926.S    |  31 +--
 arch/arm/mm/proc-arm940.S    |  21 +-
 arch/arm/mm/proc-arm946.S    |  21 +-
 arch/arm/mm/proc-arm9tdmi.S  |  26 ++-
 arch/arm/mm/proc-fa526.S     |  23 +-
 arch/arm/mm/proc-feroceon.S  |  30 +--
 arch/arm/mm/proc-mohawk.S    |  30 +--
 arch/arm/mm/proc-sa110.S     |  23 +-
 arch/arm/mm/proc-sa1100.S    |  31 +--
 arch/arm/mm/proc-v6.S        |  31 +--
 arch/arm/mm/proc-v7-2level.S |   8 +-
 arch/arm/mm/proc-v7-3level.S |   8 +-
 arch/arm/mm/proc-v7.S        |  66 +++---
 arch/arm/mm/proc-v7m.S       |  41 ++--
 arch/arm/mm/proc-xsc3.S      |  30 +--
 arch/arm/mm/proc-xscale.S    |  30 +--
 arch/arm/mm/proc.c           | 500 +++++++++++++++++++++++++++++++++++++++++++
 28 files changed, 934 insertions(+), 274 deletions(-)

diff --git a/arch/arm/mm/Makefile b/arch/arm/mm/Makefile
index 17665381be96..f1f231f20ff9 100644
--- a/arch/arm/mm/Makefile
+++ b/arch/arm/mm/Makefile
@@ -90,6 +90,7 @@ obj-$(CONFIG_CPU_V6)		+= proc-v6.o
 obj-$(CONFIG_CPU_V6K)		+= proc-v6.o
 obj-$(CONFIG_CPU_V7)		+= proc-v7.o proc-v7-bugs.o
 obj-$(CONFIG_CPU_V7M)		+= proc-v7m.o
+obj-$(CONFIG_CFI_CLANG)		+= proc.o
 
 obj-$(CONFIG_OUTER_CACHE)	+= l2c-common.o
 obj-$(CONFIG_CACHE_B15_RAC)	+= cache-b15-rac.o
diff --git a/arch/arm/mm/proc-arm1020.S b/arch/arm/mm/proc-arm1020.S
index 6194ff0d6057..10c876e359c6 100644
--- a/arch/arm/mm/proc-arm1020.S
+++ b/arch/arm/mm/proc-arm1020.S
@@ -57,18 +57,20 @@
 /*
  * cpu_arm1020_proc_init()
  */
-ENTRY(cpu_arm1020_proc_init)
+SYM_TYPED_FUNC_START(cpu_arm1020_proc_init)
 	ret	lr
+SYM_FUNC_END(cpu_arm1020_proc_init)
 
 /*
  * cpu_arm1020_proc_fin()
  */
-ENTRY(cpu_arm1020_proc_fin)
+SYM_TYPED_FUNC_START(cpu_arm1020_proc_fin)
 	mrc	p15, 0, r0, c1, c0, 0		@ ctrl register
 	bic	r0, r0, #0x1000 		@ ...i............
 	bic	r0, r0, #0x000e 		@ ............wca.
 	mcr	p15, 0, r0, c1, c0, 0		@ disable caches
 	ret	lr
+SYM_FUNC_END(cpu_arm1020_proc_fin)
 
 /*
  * cpu_arm1020_reset(loc)
@@ -81,7 +83,7 @@ ENTRY(cpu_arm1020_proc_fin)
  */
 	.align	5
 	.pushsection	.idmap.text, "ax"
-ENTRY(cpu_arm1020_reset)
+SYM_TYPED_FUNC_START(cpu_arm1020_reset)
 	mov	ip, #0
 	mcr	p15, 0, ip, c7, c7, 0		@ invalidate I,D caches
 	mcr	p15, 0, ip, c7, c10, 4		@ drain WB
@@ -93,16 +95,17 @@ ENTRY(cpu_arm1020_reset)
 	bic	ip, ip, #0x1100 		@ ...i...s........
 	mcr	p15, 0, ip, c1, c0, 0		@ ctrl register
 	ret	r0
-ENDPROC(cpu_arm1020_reset)
+SYM_FUNC_END(cpu_arm1020_reset)
 	.popsection
 
 /*
  * cpu_arm1020_do_idle()
  */
 	.align	5
-ENTRY(cpu_arm1020_do_idle)
+SYM_TYPED_FUNC_START(cpu_arm1020_do_idle)
 	mcr	p15, 0, r0, c7, c0, 4		@ Wait for interrupt
 	ret	lr
+SYM_FUNC_END(cpu_arm1020_do_idle)
 
 /* ================================= CACHE ================================ */
 
@@ -362,7 +365,7 @@ SYM_TYPED_FUNC_START(arm1020_dma_unmap_area)
 SYM_FUNC_END(arm1020_dma_unmap_area)
 
 	.align	5
-ENTRY(cpu_arm1020_dcache_clean_area)
+SYM_TYPED_FUNC_START(cpu_arm1020_dcache_clean_area)
 #ifndef CONFIG_CPU_DCACHE_DISABLE
 	mov	ip, #0
 1:	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
@@ -372,6 +375,7 @@ ENTRY(cpu_arm1020_dcache_clean_area)
 	bhi	1b
 #endif
 	ret	lr
+SYM_FUNC_END(cpu_arm1020_dcache_clean_area)
 
 /* =============================== PageTable ============================== */
 
@@ -383,7 +387,7 @@ ENTRY(cpu_arm1020_dcache_clean_area)
  * pgd: new page tables
  */
 	.align	5
-ENTRY(cpu_arm1020_switch_mm)
+SYM_TYPED_FUNC_START(cpu_arm1020_switch_mm)
 #ifdef CONFIG_MMU
 #ifndef CONFIG_CPU_DCACHE_DISABLE
 	mcr	p15, 0, r3, c7, c10, 4
@@ -411,14 +415,15 @@ ENTRY(cpu_arm1020_switch_mm)
 	mcr	p15, 0, r1, c8, c7, 0		@ invalidate I & D TLBs
 #endif /* CONFIG_MMU */
 	ret	lr
-        
+SYM_FUNC_END(cpu_arm1020_switch_mm)
+
 /*
  * cpu_arm1020_set_pte(ptep, pte)
  *
  * Set a PTE and flush it out
  */
 	.align	5
-ENTRY(cpu_arm1020_set_pte_ext)
+SYM_TYPED_FUNC_START(cpu_arm1020_set_pte_ext)
 #ifdef CONFIG_MMU
 	armv3_set_pte_ext
 	mov	r0, r0
@@ -429,6 +434,7 @@ ENTRY(cpu_arm1020_set_pte_ext)
 	mcr	p15, 0, r0, c7, c10, 4		@ drain WB
 #endif /* CONFIG_MMU */
 	ret	lr
+SYM_FUNC_END(cpu_arm1020_set_pte_ext)
 
 	.type	__arm1020_setup, #function
 __arm1020_setup:
diff --git a/arch/arm/mm/proc-arm1020e.S b/arch/arm/mm/proc-arm1020e.S
index 1e14f824384e..686a1428a0dd 100644
--- a/arch/arm/mm/proc-arm1020e.S
+++ b/arch/arm/mm/proc-arm1020e.S
@@ -57,18 +57,20 @@
 /*
  * cpu_arm1020e_proc_init()
  */
-ENTRY(cpu_arm1020e_proc_init)
+SYM_TYPED_FUNC_START(cpu_arm1020e_proc_init)
 	ret	lr
+SYM_FUNC_END(cpu_arm1020e_proc_init)
 
 /*
  * cpu_arm1020e_proc_fin()
  */
-ENTRY(cpu_arm1020e_proc_fin)
+SYM_TYPED_FUNC_START(cpu_arm1020e_proc_fin)
 	mrc	p15, 0, r0, c1, c0, 0		@ ctrl register
 	bic	r0, r0, #0x1000 		@ ...i............
 	bic	r0, r0, #0x000e 		@ ............wca.
 	mcr	p15, 0, r0, c1, c0, 0		@ disable caches
 	ret	lr
+SYM_FUNC_END(cpu_arm1020e_proc_fin)
 
 /*
  * cpu_arm1020e_reset(loc)
@@ -81,7 +83,7 @@ ENTRY(cpu_arm1020e_proc_fin)
  */
 	.align	5
 	.pushsection	.idmap.text, "ax"
-ENTRY(cpu_arm1020e_reset)
+SYM_TYPED_FUNC_START(cpu_arm1020e_reset)
 	mov	ip, #0
 	mcr	p15, 0, ip, c7, c7, 0		@ invalidate I,D caches
 	mcr	p15, 0, ip, c7, c10, 4		@ drain WB
@@ -93,16 +95,17 @@ ENTRY(cpu_arm1020e_reset)
 	bic	ip, ip, #0x1100 		@ ...i...s........
 	mcr	p15, 0, ip, c1, c0, 0		@ ctrl register
 	ret	r0
-ENDPROC(cpu_arm1020e_reset)
+SYM_FUNC_END(cpu_arm1020e_reset)
 	.popsection
 
 /*
  * cpu_arm1020e_do_idle()
  */
 	.align	5
-ENTRY(cpu_arm1020e_do_idle)
+SYM_TYPED_FUNC_START(cpu_arm1020e_do_idle)
 	mcr	p15, 0, r0, c7, c0, 4		@ Wait for interrupt
 	ret	lr
+SYM_FUNC_END(cpu_arm1020e_do_idle)
 
 /* ================================= CACHE ================================ */
 
@@ -349,7 +352,7 @@ SYM_TYPED_FUNC_START(arm1020e_dma_unmap_area)
 SYM_FUNC_END(arm1020e_dma_unmap_area)
 
 	.align	5
-ENTRY(cpu_arm1020e_dcache_clean_area)
+SYM_TYPED_FUNC_START(cpu_arm1020e_dcache_clean_area)
 #ifndef CONFIG_CPU_DCACHE_DISABLE
 	mov	ip, #0
 1:	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
@@ -358,6 +361,7 @@ ENTRY(cpu_arm1020e_dcache_clean_area)
 	bhi	1b
 #endif
 	ret	lr
+SYM_FUNC_END(cpu_arm1020e_dcache_clean_area)
 
 /* =============================== PageTable ============================== */
 
@@ -369,7 +373,7 @@ ENTRY(cpu_arm1020e_dcache_clean_area)
  * pgd: new page tables
  */
 	.align	5
-ENTRY(cpu_arm1020e_switch_mm)
+SYM_TYPED_FUNC_START(cpu_arm1020e_switch_mm)
 #ifdef CONFIG_MMU
 #ifndef CONFIG_CPU_DCACHE_DISABLE
 	mcr	p15, 0, r3, c7, c10, 4
@@ -396,14 +400,15 @@ ENTRY(cpu_arm1020e_switch_mm)
 	mcr	p15, 0, r1, c8, c7, 0		@ invalidate I & D TLBs
 #endif
 	ret	lr
-        
+SYM_FUNC_END(cpu_arm1020e_switch_mm)
+
 /*
  * cpu_arm1020e_set_pte(ptep, pte)
  *
  * Set a PTE and flush it out
  */
 	.align	5
-ENTRY(cpu_arm1020e_set_pte_ext)
+SYM_TYPED_FUNC_START(cpu_arm1020e_set_pte_ext)
 #ifdef CONFIG_MMU
 	armv3_set_pte_ext
 	mov	r0, r0
@@ -412,6 +417,7 @@ ENTRY(cpu_arm1020e_set_pte_ext)
 #endif
 #endif /* CONFIG_MMU */
 	ret	lr
+SYM_FUNC_END(cpu_arm1020e_set_pte_ext)
 
 	.type	__arm1020e_setup, #function
 __arm1020e_setup:
diff --git a/arch/arm/mm/proc-arm1022.S b/arch/arm/mm/proc-arm1022.S
index 6710514bf34f..9215bb086c0d 100644
--- a/arch/arm/mm/proc-arm1022.S
+++ b/arch/arm/mm/proc-arm1022.S
@@ -57,18 +57,20 @@
 /*
  * cpu_arm1022_proc_init()
  */
-ENTRY(cpu_arm1022_proc_init)
+SYM_TYPED_FUNC_START(cpu_arm1022_proc_init)
 	ret	lr
+SYM_FUNC_END(cpu_arm1022_proc_init)
 
 /*
  * cpu_arm1022_proc_fin()
  */
-ENTRY(cpu_arm1022_proc_fin)
+SYM_TYPED_FUNC_START(cpu_arm1022_proc_fin)
 	mrc	p15, 0, r0, c1, c0, 0		@ ctrl register
 	bic	r0, r0, #0x1000 		@ ...i............
 	bic	r0, r0, #0x000e 		@ ............wca.
 	mcr	p15, 0, r0, c1, c0, 0		@ disable caches
 	ret	lr
+SYM_FUNC_END(cpu_arm1022_proc_fin)
 
 /*
  * cpu_arm1022_reset(loc)
@@ -81,7 +83,7 @@ ENTRY(cpu_arm1022_proc_fin)
  */
 	.align	5
 	.pushsection	.idmap.text, "ax"
-ENTRY(cpu_arm1022_reset)
+SYM_TYPED_FUNC_START(cpu_arm1022_reset)
 	mov	ip, #0
 	mcr	p15, 0, ip, c7, c7, 0		@ invalidate I,D caches
 	mcr	p15, 0, ip, c7, c10, 4		@ drain WB
@@ -93,16 +95,17 @@ ENTRY(cpu_arm1022_reset)
 	bic	ip, ip, #0x1100 		@ ...i...s........
 	mcr	p15, 0, ip, c1, c0, 0		@ ctrl register
 	ret	r0
-ENDPROC(cpu_arm1022_reset)
+SYM_FUNC_END(cpu_arm1022_reset)
 	.popsection
 
 /*
  * cpu_arm1022_do_idle()
  */
 	.align	5
-ENTRY(cpu_arm1022_do_idle)
+SYM_TYPED_FUNC_START(cpu_arm1022_do_idle)
 	mcr	p15, 0, r0, c7, c0, 4		@ Wait for interrupt
 	ret	lr
+SYM_FUNC_END(cpu_arm1022_do_idle)
 
 /* ================================= CACHE ================================ */
 
@@ -348,7 +351,7 @@ SYM_TYPED_FUNC_START(arm1022_dma_unmap_area)
 SYM_FUNC_END(arm1022_dma_unmap_area)
 
 	.align	5
-ENTRY(cpu_arm1022_dcache_clean_area)
+SYM_TYPED_FUNC_START(cpu_arm1022_dcache_clean_area)
 #ifndef CONFIG_CPU_DCACHE_DISABLE
 	mov	ip, #0
 1:	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
@@ -357,6 +360,7 @@ ENTRY(cpu_arm1022_dcache_clean_area)
 	bhi	1b
 #endif
 	ret	lr
+SYM_FUNC_END(cpu_arm1022_dcache_clean_area)
 
 /* =============================== PageTable ============================== */
 
@@ -368,7 +372,7 @@ ENTRY(cpu_arm1022_dcache_clean_area)
  * pgd: new page tables
  */
 	.align	5
-ENTRY(cpu_arm1022_switch_mm)
+SYM_TYPED_FUNC_START(cpu_arm1022_switch_mm)
 #ifdef CONFIG_MMU
 #ifndef CONFIG_CPU_DCACHE_DISABLE
 	mov	r1, #(CACHE_DSEGMENTS - 1) << 5	@ 16 segments
@@ -388,14 +392,15 @@ ENTRY(cpu_arm1022_switch_mm)
 	mcr	p15, 0, r1, c8, c7, 0		@ invalidate I & D TLBs
 #endif
 	ret	lr
-        
+SYM_FUNC_END(cpu_arm1022_switch_mm)
+
 /*
  * cpu_arm1022_set_pte_ext(ptep, pte, ext)
  *
  * Set a PTE and flush it out
  */
 	.align	5
-ENTRY(cpu_arm1022_set_pte_ext)
+SYM_TYPED_FUNC_START(cpu_arm1022_set_pte_ext)
 #ifdef CONFIG_MMU
 	armv3_set_pte_ext
 	mov	r0, r0
@@ -404,6 +409,7 @@ ENTRY(cpu_arm1022_set_pte_ext)
 #endif
 #endif /* CONFIG_MMU */
 	ret	lr
+SYM_FUNC_END(cpu_arm1022_set_pte_ext)
 
 	.type	__arm1022_setup, #function
 __arm1022_setup:
diff --git a/arch/arm/mm/proc-arm1026.S b/arch/arm/mm/proc-arm1026.S
index 2a2545b98295..a64d60e49489 100644
--- a/arch/arm/mm/proc-arm1026.S
+++ b/arch/arm/mm/proc-arm1026.S
@@ -57,18 +57,20 @@
 /*
  * cpu_arm1026_proc_init()
  */
-ENTRY(cpu_arm1026_proc_init)
+SYM_TYPED_FUNC_START(cpu_arm1026_proc_init)
 	ret	lr
+SYM_FUNC_END(cpu_arm1026_proc_init)
 
 /*
  * cpu_arm1026_proc_fin()
  */
-ENTRY(cpu_arm1026_proc_fin)
+SYM_TYPED_FUNC_START(cpu_arm1026_proc_fin)
 	mrc	p15, 0, r0, c1, c0, 0		@ ctrl register
 	bic	r0, r0, #0x1000 		@ ...i............
 	bic	r0, r0, #0x000e 		@ ............wca.
 	mcr	p15, 0, r0, c1, c0, 0		@ disable caches
 	ret	lr
+SYM_FUNC_END(cpu_arm1026_proc_fin)
 
 /*
  * cpu_arm1026_reset(loc)
@@ -81,7 +83,7 @@ ENTRY(cpu_arm1026_proc_fin)
  */
 	.align	5
 	.pushsection	.idmap.text, "ax"
-ENTRY(cpu_arm1026_reset)
+SYM_TYPED_FUNC_START(cpu_arm1026_reset)
 	mov	ip, #0
 	mcr	p15, 0, ip, c7, c7, 0		@ invalidate I,D caches
 	mcr	p15, 0, ip, c7, c10, 4		@ drain WB
@@ -93,16 +95,17 @@ ENTRY(cpu_arm1026_reset)
 	bic	ip, ip, #0x1100 		@ ...i...s........
 	mcr	p15, 0, ip, c1, c0, 0		@ ctrl register
 	ret	r0
-ENDPROC(cpu_arm1026_reset)
+SYM_FUNC_END(cpu_arm1026_reset)
 	.popsection
 
 /*
  * cpu_arm1026_do_idle()
  */
 	.align	5
-ENTRY(cpu_arm1026_do_idle)
+SYM_TYPED_FUNC_START(cpu_arm1026_do_idle)
 	mcr	p15, 0, r0, c7, c0, 4		@ Wait for interrupt
 	ret	lr
+SYM_FUNC_END(cpu_arm1026_do_idle)
 
 /* ================================= CACHE ================================ */
 
@@ -343,7 +346,7 @@ SYM_TYPED_FUNC_START(arm1026_dma_unmap_area)
 SYM_FUNC_END(arm1026_dma_unmap_area)
 
 	.align	5
-ENTRY(cpu_arm1026_dcache_clean_area)
+SYM_TYPED_FUNC_START(cpu_arm1026_dcache_clean_area)
 #ifndef CONFIG_CPU_DCACHE_DISABLE
 	mov	ip, #0
 1:	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
@@ -352,6 +355,7 @@ ENTRY(cpu_arm1026_dcache_clean_area)
 	bhi	1b
 #endif
 	ret	lr
+SYM_FUNC_END(cpu_arm1026_dcache_clean_area)
 
 /* =============================== PageTable ============================== */
 
@@ -363,7 +367,7 @@ ENTRY(cpu_arm1026_dcache_clean_area)
  * pgd: new page tables
  */
 	.align	5
-ENTRY(cpu_arm1026_switch_mm)
+SYM_TYPED_FUNC_START(cpu_arm1026_switch_mm)
 #ifdef CONFIG_MMU
 	mov	r1, #0
 #ifndef CONFIG_CPU_DCACHE_DISABLE
@@ -378,14 +382,15 @@ ENTRY(cpu_arm1026_switch_mm)
 	mcr	p15, 0, r1, c8, c7, 0		@ invalidate I & D TLBs
 #endif
 	ret	lr
-        
+SYM_FUNC_END(cpu_arm1026_switch_mm)
+
 /*
  * cpu_arm1026_set_pte_ext(ptep, pte, ext)
  *
  * Set a PTE and flush it out
  */
 	.align	5
-ENTRY(cpu_arm1026_set_pte_ext)
+SYM_TYPED_FUNC_START(cpu_arm1026_set_pte_ext)
 #ifdef CONFIG_MMU
 	armv3_set_pte_ext
 	mov	r0, r0
@@ -394,6 +399,7 @@ ENTRY(cpu_arm1026_set_pte_ext)
 #endif
 #endif /* CONFIG_MMU */
 	ret	lr
+SYM_FUNC_END(cpu_arm1026_set_pte_ext)
 
 	.type	__arm1026_setup, #function
 __arm1026_setup:
diff --git a/arch/arm/mm/proc-arm720.S b/arch/arm/mm/proc-arm720.S
index 3b687e6dd9fd..59732c334e1d 100644
--- a/arch/arm/mm/proc-arm720.S
+++ b/arch/arm/mm/proc-arm720.S
@@ -20,6 +20,7 @@
  */
 #include <linux/linkage.h>
 #include <linux/init.h>
+#include <linux/cfi_types.h>
 #include <linux/pgtable.h>
 #include <asm/assembler.h>
 #include <asm/asm-offsets.h>
@@ -35,24 +36,30 @@
  *
  * Notes   : This processor does not require these
  */
-ENTRY(cpu_arm720_dcache_clean_area)
-ENTRY(cpu_arm720_proc_init)
+SYM_TYPED_FUNC_START(cpu_arm720_dcache_clean_area)
 		ret	lr
+SYM_FUNC_END(cpu_arm720_dcache_clean_area)
 
-ENTRY(cpu_arm720_proc_fin)
+SYM_TYPED_FUNC_START(cpu_arm720_proc_init)
+		ret	lr
+SYM_FUNC_END(cpu_arm720_proc_init)
+
+SYM_TYPED_FUNC_START(cpu_arm720_proc_fin)
 		mrc	p15, 0, r0, c1, c0, 0
 		bic	r0, r0, #0x1000			@ ...i............
 		bic	r0, r0, #0x000e			@ ............wca.
 		mcr	p15, 0, r0, c1, c0, 0		@ disable caches
 		ret	lr
+SYM_FUNC_END(cpu_arm720_proc_fin)
 
 /*
  * Function: arm720_proc_do_idle(void)
  * Params  : r0 = unused
  * Purpose : put the processor in proper idle mode
  */
-ENTRY(cpu_arm720_do_idle)
+SYM_TYPED_FUNC_START(cpu_arm720_do_idle)
 		ret	lr
+SYM_FUNC_END(cpu_arm720_do_idle)
 
 /*
  * Function: arm720_switch_mm(unsigned long pgd_phys)
@@ -60,7 +67,7 @@ ENTRY(cpu_arm720_do_idle)
  * Purpose : Perform a task switch, saving the old process' state and restoring
  *	     the new.
  */
-ENTRY(cpu_arm720_switch_mm)
+SYM_TYPED_FUNC_START(cpu_arm720_switch_mm)
 #ifdef CONFIG_MMU
 		mov	r1, #0
 		mcr	p15, 0, r1, c7, c7, 0		@ invalidate cache
@@ -68,6 +75,7 @@ ENTRY(cpu_arm720_switch_mm)
 		mcr	p15, 0, r1, c8, c7, 0		@ flush TLB (v4)
 #endif
 		ret	lr
+SYM_FUNC_END(cpu_arm720_switch_mm)
 
 /*
  * Function: arm720_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext)
@@ -76,11 +84,12 @@ ENTRY(cpu_arm720_switch_mm)
  * Purpose : Set a PTE and flush it out of any WB cache
  */
 	.align	5
-ENTRY(cpu_arm720_set_pte_ext)
+SYM_TYPED_FUNC_START(cpu_arm720_set_pte_ext)
 #ifdef CONFIG_MMU
 	armv3_set_pte_ext wc_disable=0
 #endif
 	ret	lr
+SYM_FUNC_END(cpu_arm720_set_pte_ext)
 
 /*
  * Function: arm720_reset
@@ -88,7 +97,7 @@ ENTRY(cpu_arm720_set_pte_ext)
  * Notes   : This sets up everything for a reset
  */
 		.pushsection	.idmap.text, "ax"
-ENTRY(cpu_arm720_reset)
+SYM_TYPED_FUNC_START(cpu_arm720_reset)
 		mov	ip, #0
 		mcr	p15, 0, ip, c7, c7, 0		@ invalidate cache
 #ifdef CONFIG_MMU
@@ -99,7 +108,7 @@ ENTRY(cpu_arm720_reset)
 		bic	ip, ip, #0x2100			@ ..v....s........
 		mcr	p15, 0, ip, c1, c0, 0		@ ctrl register
 		ret	r0
-ENDPROC(cpu_arm720_reset)
+SYM_FUNC_END(cpu_arm720_reset)
 		.popsection
 
 	.type	__arm710_setup, #function
diff --git a/arch/arm/mm/proc-arm740.S b/arch/arm/mm/proc-arm740.S
index f2ec3bc60874..78854df63964 100644
--- a/arch/arm/mm/proc-arm740.S
+++ b/arch/arm/mm/proc-arm740.S
@@ -6,6 +6,7 @@
  */
 #include <linux/linkage.h>
 #include <linux/init.h>
+#include <linux/cfi_types.h>
 #include <linux/pgtable.h>
 #include <asm/assembler.h>
 #include <asm/asm-offsets.h>
@@ -24,21 +25,32 @@
  *
  * These are not required.
  */
-ENTRY(cpu_arm740_proc_init)
-ENTRY(cpu_arm740_do_idle)
-ENTRY(cpu_arm740_dcache_clean_area)
-ENTRY(cpu_arm740_switch_mm)
+SYM_TYPED_FUNC_START(cpu_arm740_proc_init)
 	ret	lr
+SYM_FUNC_END(cpu_arm740_proc_init)
+
+SYM_TYPED_FUNC_START(cpu_arm740_do_idle)
+	ret	lr
+SYM_FUNC_END(cpu_arm740_do_idle)
+
+SYM_TYPED_FUNC_START(cpu_arm740_dcache_clean_area)
+	ret	lr
+SYM_FUNC_END(cpu_arm740_dcache_clean_area)
+
+SYM_TYPED_FUNC_START(cpu_arm740_switch_mm)
+	ret	lr
+SYM_FUNC_END(cpu_arm740_switch_mm)
 
 /*
  * cpu_arm740_proc_fin()
  */
-ENTRY(cpu_arm740_proc_fin)
+SYM_TYPED_FUNC_START(cpu_arm740_proc_fin)
 	mrc	p15, 0, r0, c1, c0, 0
 	bic	r0, r0, #0x3f000000		@ bank/f/lock/s
 	bic	r0, r0, #0x0000000c		@ w-buffer/cache
 	mcr	p15, 0, r0, c1, c0, 0		@ disable caches
 	ret	lr
+SYM_FUNC_END(cpu_arm740_proc_fin)
 
 /*
  * cpu_arm740_reset(loc)
@@ -46,14 +58,14 @@ ENTRY(cpu_arm740_proc_fin)
  * Notes   : This sets up everything for a reset
  */
 	.pushsection	.idmap.text, "ax"
-ENTRY(cpu_arm740_reset)
+SYM_TYPED_FUNC_START(cpu_arm740_reset)
 	mov	ip, #0
 	mcr	p15, 0, ip, c7, c0, 0		@ invalidate cache
 	mrc	p15, 0, ip, c1, c0, 0		@ get ctrl register
 	bic	ip, ip, #0x0000000c		@ ............wc..
 	mcr	p15, 0, ip, c1, c0, 0		@ ctrl register
 	ret	r0
-ENDPROC(cpu_arm740_reset)
+SYM_FUNC_END(cpu_arm740_reset)
 	.popsection
 
 	.type	__arm740_setup, #function
diff --git a/arch/arm/mm/proc-arm7tdmi.S b/arch/arm/mm/proc-arm7tdmi.S
index 01bbe7576c1c..baa3d4472147 100644
--- a/arch/arm/mm/proc-arm7tdmi.S
+++ b/arch/arm/mm/proc-arm7tdmi.S
@@ -6,6 +6,7 @@
  */
 #include <linux/linkage.h>
 #include <linux/init.h>
+#include <linux/cfi_types.h>
 #include <linux/pgtable.h>
 #include <asm/assembler.h>
 #include <asm/asm-offsets.h>
@@ -23,18 +24,29 @@
  * cpu_arm7tdmi_switch_mm()
  *
  * These are not required.
- */
-ENTRY(cpu_arm7tdmi_proc_init)
-ENTRY(cpu_arm7tdmi_do_idle)
-ENTRY(cpu_arm7tdmi_dcache_clean_area)
-ENTRY(cpu_arm7tdmi_switch_mm)
-		ret	lr
+*/
+SYM_TYPED_FUNC_START(cpu_arm7tdmi_proc_init)
+	ret lr
+SYM_FUNC_END(cpu_arm7tdmi_proc_init)
+
+SYM_TYPED_FUNC_START(cpu_arm7tdmi_do_idle)
+	ret lr
+SYM_FUNC_END(cpu_arm7tdmi_do_idle)
+
+SYM_TYPED_FUNC_START(cpu_arm7tdmi_dcache_clean_area)
+	ret lr
+SYM_FUNC_END(cpu_arm7tdmi_dcache_clean_area)
+
+SYM_TYPED_FUNC_START(cpu_arm7tdmi_switch_mm)
+	ret	lr
+SYM_FUNC_END(cpu_arm7tdmi_switch_mm)
 
 /*
  * cpu_arm7tdmi_proc_fin()
- */
-ENTRY(cpu_arm7tdmi_proc_fin)
-		ret	lr
+*/
+SYM_TYPED_FUNC_START(cpu_arm7tdmi_proc_fin)
+	ret	lr
+SYM_FUNC_END(cpu_arm7tdmi_proc_fin)
 
 /*
  * Function: cpu_arm7tdmi_reset(loc)
@@ -42,9 +54,9 @@ ENTRY(cpu_arm7tdmi_proc_fin)
  * Purpose : Sets up everything for a reset and jump to the location for soft reset.
  */
 		.pushsection	.idmap.text, "ax"
-ENTRY(cpu_arm7tdmi_reset)
+SYM_TYPED_FUNC_START(cpu_arm7tdmi_reset)
 		ret	r0
-ENDPROC(cpu_arm7tdmi_reset)
+SYM_FUNC_END(cpu_arm7tdmi_reset)
 		.popsection
 
 		.type	__arm7tdmi_setup, #function
diff --git a/arch/arm/mm/proc-arm920.S b/arch/arm/mm/proc-arm920.S
index db7d09698372..6a4c1a3030cd 100644
--- a/arch/arm/mm/proc-arm920.S
+++ b/arch/arm/mm/proc-arm920.S
@@ -49,18 +49,20 @@
 /*
  * cpu_arm920_proc_init()
  */
-ENTRY(cpu_arm920_proc_init)
+SYM_TYPED_FUNC_START(cpu_arm920_proc_init)
 	ret	lr
+SYM_FUNC_END(cpu_arm920_proc_init)
 
 /*
  * cpu_arm920_proc_fin()
  */
-ENTRY(cpu_arm920_proc_fin)
+SYM_TYPED_FUNC_START(cpu_arm920_proc_fin)
 	mrc	p15, 0, r0, c1, c0, 0		@ ctrl register
 	bic	r0, r0, #0x1000			@ ...i............
 	bic	r0, r0, #0x000e			@ ............wca.
 	mcr	p15, 0, r0, c1, c0, 0		@ disable caches
 	ret	lr
+SYM_FUNC_END(cpu_arm920_proc_fin)
 
 /*
  * cpu_arm920_reset(loc)
@@ -73,7 +75,7 @@ ENTRY(cpu_arm920_proc_fin)
  */
 	.align	5
 	.pushsection	.idmap.text, "ax"
-ENTRY(cpu_arm920_reset)
+SYM_TYPED_FUNC_START(cpu_arm920_reset)
 	mov	ip, #0
 	mcr	p15, 0, ip, c7, c7, 0		@ invalidate I,D caches
 	mcr	p15, 0, ip, c7, c10, 4		@ drain WB
@@ -85,17 +87,17 @@ ENTRY(cpu_arm920_reset)
 	bic	ip, ip, #0x1100			@ ...i...s........
 	mcr	p15, 0, ip, c1, c0, 0		@ ctrl register
 	ret	r0
-ENDPROC(cpu_arm920_reset)
+SYM_FUNC_END(cpu_arm920_reset)
 	.popsection
 
 /*
  * cpu_arm920_do_idle()
  */
 	.align	5
-ENTRY(cpu_arm920_do_idle)
+SYM_TYPED_FUNC_START(cpu_arm920_do_idle)
 	mcr	p15, 0, r0, c7, c0, 4		@ Wait for interrupt
 	ret	lr
-
+SYM_FUNC_END(cpu_arm920_do_idle)
 
 #ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
 
@@ -316,12 +318,13 @@ SYM_FUNC_END(arm920_dma_unmap_area)
 #endif /* !CONFIG_CPU_DCACHE_WRITETHROUGH */
 
 
-ENTRY(cpu_arm920_dcache_clean_area)
+SYM_TYPED_FUNC_START(cpu_arm920_dcache_clean_area)
 1:	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
 	add	r0, r0, #CACHE_DLINESIZE
 	subs	r1, r1, #CACHE_DLINESIZE
 	bhi	1b
 	ret	lr
+SYM_FUNC_END(cpu_arm920_dcache_clean_area)
 
 /* =============================== PageTable ============================== */
 
@@ -333,7 +336,7 @@ ENTRY(cpu_arm920_dcache_clean_area)
  * pgd: new page tables
  */
 	.align	5
-ENTRY(cpu_arm920_switch_mm)
+SYM_TYPED_FUNC_START(cpu_arm920_switch_mm)
 #ifdef CONFIG_MMU
 	mov	ip, #0
 #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
@@ -357,6 +360,7 @@ ENTRY(cpu_arm920_switch_mm)
 	mcr	p15, 0, ip, c8, c7, 0		@ invalidate I & D TLBs
 #endif
 	ret	lr
+SYM_FUNC_END(cpu_arm920_switch_mm)
 
 /*
  * cpu_arm920_set_pte(ptep, pte, ext)
@@ -364,7 +368,7 @@ ENTRY(cpu_arm920_switch_mm)
  * Set a PTE and flush it out
  */
 	.align	5
-ENTRY(cpu_arm920_set_pte_ext)
+SYM_TYPED_FUNC_START(cpu_arm920_set_pte_ext)
 #ifdef CONFIG_MMU
 	armv3_set_pte_ext
 	mov	r0, r0
@@ -372,21 +376,22 @@ ENTRY(cpu_arm920_set_pte_ext)
 	mcr	p15, 0, r0, c7, c10, 4		@ drain WB
 #endif
 	ret	lr
+SYM_FUNC_END(cpu_arm920_set_pte_ext)
 
 /* Suspend/resume support: taken from arch/arm/plat-s3c24xx/sleep.S */
 .globl	cpu_arm920_suspend_size
 .equ	cpu_arm920_suspend_size, 4 * 3
 #ifdef CONFIG_ARM_CPU_SUSPEND
-ENTRY(cpu_arm920_do_suspend)
+SYM_TYPED_FUNC_START(cpu_arm920_do_suspend)
 	stmfd	sp!, {r4 - r6, lr}
 	mrc	p15, 0, r4, c13, c0, 0	@ PID
 	mrc	p15, 0, r5, c3, c0, 0	@ Domain ID
 	mrc	p15, 0, r6, c1, c0, 0	@ Control register
 	stmia	r0, {r4 - r6}
 	ldmfd	sp!, {r4 - r6, pc}
-ENDPROC(cpu_arm920_do_suspend)
+SYM_FUNC_END(cpu_arm920_do_suspend)
 
-ENTRY(cpu_arm920_do_resume)
+SYM_TYPED_FUNC_START(cpu_arm920_do_resume)
 	mov	ip, #0
 	mcr	p15, 0, ip, c8, c7, 0	@ invalidate I+D TLBs
 	mcr	p15, 0, ip, c7, c7, 0	@ invalidate I+D caches
@@ -396,7 +401,7 @@ ENTRY(cpu_arm920_do_resume)
 	mcr	p15, 0, r1, c2, c0, 0	@ TTB address
 	mov	r0, r6			@ control register
 	b	cpu_resume_mmu
-ENDPROC(cpu_arm920_do_resume)
+SYM_FUNC_END(cpu_arm920_do_resume)
 #endif
 
 	.type	__arm920_setup, #function
diff --git a/arch/arm/mm/proc-arm922.S b/arch/arm/mm/proc-arm922.S
index bbd0ba1683de..8bddc734ea70 100644
--- a/arch/arm/mm/proc-arm922.S
+++ b/arch/arm/mm/proc-arm922.S
@@ -51,18 +51,20 @@
 /*
  * cpu_arm922_proc_init()
  */
-ENTRY(cpu_arm922_proc_init)
+SYM_TYPED_FUNC_START(cpu_arm922_proc_init)
 	ret	lr
+SYM_FUNC_END(cpu_arm922_proc_init)
 
 /*
  * cpu_arm922_proc_fin()
  */
-ENTRY(cpu_arm922_proc_fin)
+SYM_TYPED_FUNC_START(cpu_arm922_proc_fin)
 	mrc	p15, 0, r0, c1, c0, 0		@ ctrl register
 	bic	r0, r0, #0x1000			@ ...i............
 	bic	r0, r0, #0x000e			@ ............wca.
 	mcr	p15, 0, r0, c1, c0, 0		@ disable caches
 	ret	lr
+SYM_FUNC_END(cpu_arm922_proc_fin)
 
 /*
  * cpu_arm922_reset(loc)
@@ -75,7 +77,7 @@ ENTRY(cpu_arm922_proc_fin)
  */
 	.align	5
 	.pushsection	.idmap.text, "ax"
-ENTRY(cpu_arm922_reset)
+SYM_TYPED_FUNC_START(cpu_arm922_reset)
 	mov	ip, #0
 	mcr	p15, 0, ip, c7, c7, 0		@ invalidate I,D caches
 	mcr	p15, 0, ip, c7, c10, 4		@ drain WB
@@ -87,17 +89,17 @@ ENTRY(cpu_arm922_reset)
 	bic	ip, ip, #0x1100			@ ...i...s........
 	mcr	p15, 0, ip, c1, c0, 0		@ ctrl register
 	ret	r0
-ENDPROC(cpu_arm922_reset)
+SYM_FUNC_END(cpu_arm922_reset)
 	.popsection
 
 /*
  * cpu_arm922_do_idle()
  */
 	.align	5
-ENTRY(cpu_arm922_do_idle)
+SYM_TYPED_FUNC_START(cpu_arm922_do_idle)
 	mcr	p15, 0, r0, c7, c0, 4		@ Wait for interrupt
 	ret	lr
-
+SYM_FUNC_END(cpu_arm922_do_idle)
 
 #ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
 
@@ -317,7 +319,7 @@ SYM_FUNC_END(arm922_dma_unmap_area)
 
 #endif /* !CONFIG_CPU_DCACHE_WRITETHROUGH */
 
-ENTRY(cpu_arm922_dcache_clean_area)
+SYM_TYPED_FUNC_START(cpu_arm922_dcache_clean_area)
 #ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
 1:	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
 	add	r0, r0, #CACHE_DLINESIZE
@@ -325,6 +327,7 @@ ENTRY(cpu_arm922_dcache_clean_area)
 	bhi	1b
 #endif
 	ret	lr
+SYM_FUNC_END(cpu_arm922_dcache_clean_area)
 
 /* =============================== PageTable ============================== */
 
@@ -336,7 +339,7 @@ ENTRY(cpu_arm922_dcache_clean_area)
  * pgd: new page tables
  */
 	.align	5
-ENTRY(cpu_arm922_switch_mm)
+SYM_TYPED_FUNC_START(cpu_arm922_switch_mm)
 #ifdef CONFIG_MMU
 	mov	ip, #0
 #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
@@ -360,6 +363,7 @@ ENTRY(cpu_arm922_switch_mm)
 	mcr	p15, 0, ip, c8, c7, 0		@ invalidate I & D TLBs
 #endif
 	ret	lr
+SYM_FUNC_END(cpu_arm922_switch_mm)
 
 /*
  * cpu_arm922_set_pte_ext(ptep, pte, ext)
@@ -367,7 +371,7 @@ ENTRY(cpu_arm922_switch_mm)
  * Set a PTE and flush it out
  */
 	.align	5
-ENTRY(cpu_arm922_set_pte_ext)
+SYM_TYPED_FUNC_START(cpu_arm922_set_pte_ext)
 #ifdef CONFIG_MMU
 	armv3_set_pte_ext
 	mov	r0, r0
@@ -375,6 +379,7 @@ ENTRY(cpu_arm922_set_pte_ext)
 	mcr	p15, 0, r0, c7, c10, 4		@ drain WB
 #endif /* CONFIG_MMU */
 	ret	lr
+SYM_FUNC_END(cpu_arm922_set_pte_ext)
 
 	.type	__arm922_setup, #function
 __arm922_setup:
diff --git a/arch/arm/mm/proc-arm925.S b/arch/arm/mm/proc-arm925.S
index 7ecc95aa0546..85b056c80632 100644
--- a/arch/arm/mm/proc-arm925.S
+++ b/arch/arm/mm/proc-arm925.S
@@ -72,18 +72,20 @@
 /*
  * cpu_arm925_proc_init()
  */
-ENTRY(cpu_arm925_proc_init)
+SYM_TYPED_FUNC_START(cpu_arm925_proc_init)
 	ret	lr
+SYM_FUNC_END(cpu_arm925_proc_init)
 
 /*
  * cpu_arm925_proc_fin()
  */
-ENTRY(cpu_arm925_proc_fin)
+SYM_TYPED_FUNC_START(cpu_arm925_proc_fin)
 	mrc	p15, 0, r0, c1, c0, 0		@ ctrl register
 	bic	r0, r0, #0x1000			@ ...i............
 	bic	r0, r0, #0x000e			@ ............wca.
 	mcr	p15, 0, r0, c1, c0, 0		@ disable caches
 	ret	lr
+SYM_FUNC_END(cpu_arm925_proc_fin)
 
 /*
  * cpu_arm925_reset(loc)
@@ -96,14 +98,14 @@ ENTRY(cpu_arm925_proc_fin)
  */
 	.align	5
 	.pushsection	.idmap.text, "ax"
-ENTRY(cpu_arm925_reset)
+SYM_TYPED_FUNC_START(cpu_arm925_reset)
 	/* Send software reset to MPU and DSP */
 	mov	ip, #0xff000000
 	orr	ip, ip, #0x00fe0000
 	orr	ip, ip, #0x0000ce00
 	mov	r4, #1
 	strh	r4, [ip, #0x10]
-ENDPROC(cpu_arm925_reset)
+SYM_FUNC_END(cpu_arm925_reset)
 	.popsection
 
 	mov	ip, #0
@@ -124,7 +126,7 @@ ENDPROC(cpu_arm925_reset)
  * Called with IRQs disabled
  */
 	.align	10
-ENTRY(cpu_arm925_do_idle)
+SYM_TYPED_FUNC_START(cpu_arm925_do_idle)
 	mov	r0, #0
 	mrc	p15, 0, r1, c1, c0, 0		@ Read control register
 	mcr	p15, 0, r0, c7, c10, 4		@ Drain write buffer
@@ -133,6 +135,7 @@ ENTRY(cpu_arm925_do_idle)
 	mcr	p15, 0, r0, c7, c0, 4		@ Wait for interrupt
 	mcr	p15, 0, r1, c1, c0, 0		@ Restore ICache enable
 	ret	lr
+SYM_FUNC_END(cpu_arm925_do_idle)
 
 /*
  *	flush_icache_all()
@@ -370,7 +373,7 @@ SYM_TYPED_FUNC_START(arm925_dma_unmap_area)
 	ret	lr
 SYM_FUNC_END(arm925_dma_unmap_area)
 
-ENTRY(cpu_arm925_dcache_clean_area)
+SYM_TYPED_FUNC_START(cpu_arm925_dcache_clean_area)
 #ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
 1:	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
 	add	r0, r0, #CACHE_DLINESIZE
@@ -379,6 +382,7 @@ ENTRY(cpu_arm925_dcache_clean_area)
 #endif
 	mcr	p15, 0, r0, c7, c10, 4		@ drain WB
 	ret	lr
+SYM_FUNC_END(cpu_arm925_dcache_clean_area)
 
 /* =============================== PageTable ============================== */
 
@@ -390,7 +394,7 @@ ENTRY(cpu_arm925_dcache_clean_area)
  * pgd: new page tables
  */
 	.align	5
-ENTRY(cpu_arm925_switch_mm)
+SYM_TYPED_FUNC_START(cpu_arm925_switch_mm)
 #ifdef CONFIG_MMU
 	mov	ip, #0
 #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
@@ -408,6 +412,7 @@ ENTRY(cpu_arm925_switch_mm)
 	mcr	p15, 0, ip, c8, c7, 0		@ invalidate I & D TLBs
 #endif
 	ret	lr
+SYM_FUNC_END(cpu_arm925_switch_mm)
 
 /*
  * cpu_arm925_set_pte_ext(ptep, pte, ext)
@@ -415,7 +420,7 @@ ENTRY(cpu_arm925_switch_mm)
  * Set a PTE and flush it out
  */
 	.align	5
-ENTRY(cpu_arm925_set_pte_ext)
+SYM_TYPED_FUNC_START(cpu_arm925_set_pte_ext)
 #ifdef CONFIG_MMU
 	armv3_set_pte_ext
 	mov	r0, r0
@@ -425,6 +430,7 @@ ENTRY(cpu_arm925_set_pte_ext)
 	mcr	p15, 0, r0, c7, c10, 4		@ drain WB
 #endif /* CONFIG_MMU */
 	ret	lr
+SYM_FUNC_END(cpu_arm925_set_pte_ext)
 
 	.type	__arm925_setup, #function
 __arm925_setup:
diff --git a/arch/arm/mm/proc-arm926.S b/arch/arm/mm/proc-arm926.S
index 2aa42e330786..4569514e6371 100644
--- a/arch/arm/mm/proc-arm926.S
+++ b/arch/arm/mm/proc-arm926.S
@@ -41,18 +41,20 @@
 /*
  * cpu_arm926_proc_init()
  */
-ENTRY(cpu_arm926_proc_init)
+SYM_TYPED_FUNC_START(cpu_arm926_proc_init)
 	ret	lr
+SYM_FUNC_END(cpu_arm926_proc_init)
 
 /*
  * cpu_arm926_proc_fin()
  */
-ENTRY(cpu_arm926_proc_fin)
+SYM_TYPED_FUNC_START(cpu_arm926_proc_fin)
 	mrc	p15, 0, r0, c1, c0, 0		@ ctrl register
 	bic	r0, r0, #0x1000			@ ...i............
 	bic	r0, r0, #0x000e			@ ............wca.
 	mcr	p15, 0, r0, c1, c0, 0		@ disable caches
 	ret	lr
+SYM_FUNC_END(cpu_arm926_proc_fin)
 
 /*
  * cpu_arm926_reset(loc)
@@ -65,7 +67,7 @@ ENTRY(cpu_arm926_proc_fin)
  */
 	.align	5
 	.pushsection	.idmap.text, "ax"
-ENTRY(cpu_arm926_reset)
+SYM_TYPED_FUNC_START(cpu_arm926_reset)
 	mov	ip, #0
 	mcr	p15, 0, ip, c7, c7, 0		@ invalidate I,D caches
 	mcr	p15, 0, ip, c7, c10, 4		@ drain WB
@@ -77,7 +79,7 @@ ENTRY(cpu_arm926_reset)
 	bic	ip, ip, #0x1100			@ ...i...s........
 	mcr	p15, 0, ip, c1, c0, 0		@ ctrl register
 	ret	r0
-ENDPROC(cpu_arm926_reset)
+SYM_FUNC_END(cpu_arm926_reset)
 	.popsection
 
 /*
@@ -86,7 +88,7 @@ ENDPROC(cpu_arm926_reset)
  * Called with IRQs disabled
  */
 	.align	10
-ENTRY(cpu_arm926_do_idle)
+SYM_TYPED_FUNC_START(cpu_arm926_do_idle)
 	mov	r0, #0
 	mrc	p15, 0, r1, c1, c0, 0		@ Read control register
 	mcr	p15, 0, r0, c7, c10, 4		@ Drain write buffer
@@ -99,6 +101,7 @@ ENTRY(cpu_arm926_do_idle)
 	mcr	p15, 0, r1, c1, c0, 0		@ Restore ICache enable
 	msr	cpsr_c, r3			@ Restore FIQ state
 	ret	lr
+SYM_FUNC_END(cpu_arm926_do_idle)
 
 /*
  *	flush_icache_all()
@@ -333,7 +336,7 @@ SYM_TYPED_FUNC_START(arm926_dma_unmap_area)
 	ret	lr
 SYM_FUNC_END(arm926_dma_unmap_area)
 
-ENTRY(cpu_arm926_dcache_clean_area)
+SYM_TYPED_FUNC_START(cpu_arm926_dcache_clean_area)
 #ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
 1:	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
 	add	r0, r0, #CACHE_DLINESIZE
@@ -342,6 +345,7 @@ ENTRY(cpu_arm926_dcache_clean_area)
 #endif
 	mcr	p15, 0, r0, c7, c10, 4		@ drain WB
 	ret	lr
+SYM_FUNC_END(cpu_arm926_dcache_clean_area)
 
 /* =============================== PageTable ============================== */
 
@@ -353,7 +357,8 @@ ENTRY(cpu_arm926_dcache_clean_area)
  * pgd: new page tables
  */
 	.align	5
-ENTRY(cpu_arm926_switch_mm)
+
+SYM_TYPED_FUNC_START(cpu_arm926_switch_mm)
 #ifdef CONFIG_MMU
 	mov	ip, #0
 #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
@@ -369,6 +374,7 @@ ENTRY(cpu_arm926_switch_mm)
 	mcr	p15, 0, ip, c8, c7, 0		@ invalidate I & D TLBs
 #endif
 	ret	lr
+SYM_FUNC_END(cpu_arm926_switch_mm)
 
 /*
  * cpu_arm926_set_pte_ext(ptep, pte, ext)
@@ -376,7 +382,7 @@ ENTRY(cpu_arm926_switch_mm)
  * Set a PTE and flush it out
  */
 	.align	5
-ENTRY(cpu_arm926_set_pte_ext)
+SYM_TYPED_FUNC_START(cpu_arm926_set_pte_ext)
 #ifdef CONFIG_MMU
 	armv3_set_pte_ext
 	mov	r0, r0
@@ -386,21 +392,22 @@ ENTRY(cpu_arm926_set_pte_ext)
 	mcr	p15, 0, r0, c7, c10, 4		@ drain WB
 #endif
 	ret	lr
+SYM_FUNC_END(cpu_arm926_set_pte_ext)
 
 /* Suspend/resume support: taken from arch/arm/plat-s3c24xx/sleep.S */
 .globl	cpu_arm926_suspend_size
 .equ	cpu_arm926_suspend_size, 4 * 3
 #ifdef CONFIG_ARM_CPU_SUSPEND
-ENTRY(cpu_arm926_do_suspend)
+SYM_TYPED_FUNC_START(cpu_arm926_do_suspend)
 	stmfd	sp!, {r4 - r6, lr}
 	mrc	p15, 0, r4, c13, c0, 0	@ PID
 	mrc	p15, 0, r5, c3, c0, 0	@ Domain ID
 	mrc	p15, 0, r6, c1, c0, 0	@ Control register
 	stmia	r0, {r4 - r6}
 	ldmfd	sp!, {r4 - r6, pc}
-ENDPROC(cpu_arm926_do_suspend)
+SYM_FUNC_END(cpu_arm926_do_suspend)
 
-ENTRY(cpu_arm926_do_resume)
+SYM_TYPED_FUNC_START(cpu_arm926_do_resume)
 	mov	ip, #0
 	mcr	p15, 0, ip, c8, c7, 0	@ invalidate I+D TLBs
 	mcr	p15, 0, ip, c7, c7, 0	@ invalidate I+D caches
@@ -410,7 +417,7 @@ ENTRY(cpu_arm926_do_resume)
 	mcr	p15, 0, r1, c2, c0, 0	@ TTB address
 	mov	r0, r6			@ control register
 	b	cpu_resume_mmu
-ENDPROC(cpu_arm926_do_resume)
+SYM_FUNC_END(cpu_arm926_do_resume)
 #endif
 
 	.type	__arm926_setup, #function
diff --git a/arch/arm/mm/proc-arm940.S b/arch/arm/mm/proc-arm940.S
index 533c924948db..ccdd6fa52261 100644
--- a/arch/arm/mm/proc-arm940.S
+++ b/arch/arm/mm/proc-arm940.S
@@ -26,19 +26,24 @@
  *
  * These are not required.
  */
-ENTRY(cpu_arm940_proc_init)
-ENTRY(cpu_arm940_switch_mm)
+SYM_TYPED_FUNC_START(cpu_arm940_proc_init)
 	ret	lr
+SYM_FUNC_END(cpu_arm940_proc_init)
+
+SYM_TYPED_FUNC_START(cpu_arm940_switch_mm)
+	ret	lr
+SYM_FUNC_END(cpu_arm940_switch_mm)
 
 /*
  * cpu_arm940_proc_fin()
  */
-ENTRY(cpu_arm940_proc_fin)
+SYM_TYPED_FUNC_START(cpu_arm940_proc_fin)
 	mrc	p15, 0, r0, c1, c0, 0		@ ctrl register
 	bic	r0, r0, #0x00001000		@ i-cache
 	bic	r0, r0, #0x00000004		@ d-cache
 	mcr	p15, 0, r0, c1, c0, 0		@ disable caches
 	ret	lr
+SYM_FUNC_END(cpu_arm940_proc_fin)
 
 /*
  * cpu_arm940_reset(loc)
@@ -46,7 +51,7 @@ ENTRY(cpu_arm940_proc_fin)
  * Notes   : This sets up everything for a reset
  */
 	.pushsection	.idmap.text, "ax"
-ENTRY(cpu_arm940_reset)
+SYM_TYPED_FUNC_START(cpu_arm940_reset)
 	mov	ip, #0
 	mcr	p15, 0, ip, c7, c5, 0		@ flush I cache
 	mcr	p15, 0, ip, c7, c6, 0		@ flush D cache
@@ -56,16 +61,17 @@ ENTRY(cpu_arm940_reset)
 	bic	ip, ip, #0x00001000		@ i-cache
 	mcr	p15, 0, ip, c1, c0, 0		@ ctrl register
 	ret	r0
-ENDPROC(cpu_arm940_reset)
+SYM_FUNC_END(cpu_arm940_reset)
 	.popsection
 
 /*
  * cpu_arm940_do_idle()
  */
 	.align	5
-ENTRY(cpu_arm940_do_idle)
+SYM_TYPED_FUNC_START(cpu_arm940_do_idle)
 	mcr	p15, 0, r0, c7, c0, 4		@ Wait for interrupt
 	ret	lr
+SYM_FUNC_END(cpu_arm940_do_idle)
 
 /*
  *	flush_icache_all()
@@ -206,7 +212,7 @@ arm940_dma_inv_range:
  *	- end	- virtual end address
  */
 arm940_dma_clean_range:
-ENTRY(cpu_arm940_dcache_clean_area)
+SYM_TYPED_FUNC_START(cpu_arm940_dcache_clean_area)
 	mov	ip, #0
 #ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
 	mov	r1, #(CACHE_DSEGMENTS - 1) << 4	@ 4 segments
@@ -219,6 +225,7 @@ ENTRY(cpu_arm940_dcache_clean_area)
 #endif
 	mcr	p15, 0, ip, c7, c10, 4		@ drain WB
 	ret	lr
+SYM_FUNC_END(cpu_arm940_dcache_clean_area)
 
 /*
  *	dma_flush_range(start, end)
diff --git a/arch/arm/mm/proc-arm946.S b/arch/arm/mm/proc-arm946.S
index 210d468d316a..c7a8f64aa23c 100644
--- a/arch/arm/mm/proc-arm946.S
+++ b/arch/arm/mm/proc-arm946.S
@@ -33,19 +33,24 @@
  *
  * These are not required.
  */
-ENTRY(cpu_arm946_proc_init)
-ENTRY(cpu_arm946_switch_mm)
+SYM_TYPED_FUNC_START(cpu_arm946_proc_init)
 	ret	lr
+SYM_FUNC_END(cpu_arm946_proc_init)
+
+SYM_TYPED_FUNC_START(cpu_arm946_switch_mm)
+	ret	lr
+SYM_FUNC_END(cpu_arm946_switch_mm)
 
 /*
  * cpu_arm946_proc_fin()
  */
-ENTRY(cpu_arm946_proc_fin)
+SYM_TYPED_FUNC_START(cpu_arm946_proc_fin)
 	mrc	p15, 0, r0, c1, c0, 0		@ ctrl register
 	bic	r0, r0, #0x00001000		@ i-cache
 	bic	r0, r0, #0x00000004		@ d-cache
 	mcr	p15, 0, r0, c1, c0, 0		@ disable caches
 	ret	lr
+SYM_FUNC_END(cpu_arm946_proc_fin)
 
 /*
  * cpu_arm946_reset(loc)
@@ -53,7 +58,7 @@ ENTRY(cpu_arm946_proc_fin)
  * Notes   : This sets up everything for a reset
  */
 	.pushsection	.idmap.text, "ax"
-ENTRY(cpu_arm946_reset)
+SYM_TYPED_FUNC_START(cpu_arm946_reset)
 	mov	ip, #0
 	mcr	p15, 0, ip, c7, c5, 0		@ flush I cache
 	mcr	p15, 0, ip, c7, c6, 0		@ flush D cache
@@ -63,16 +68,17 @@ ENTRY(cpu_arm946_reset)
 	bic	ip, ip, #0x00001000		@ i-cache
 	mcr	p15, 0, ip, c1, c0, 0		@ ctrl register
 	ret	r0
-ENDPROC(cpu_arm946_reset)
+SYM_FUNC_END(cpu_arm946_reset)
 	.popsection
 
 /*
  * cpu_arm946_do_idle()
  */
 	.align	5
-ENTRY(cpu_arm946_do_idle)
+SYM_TYPED_FUNC_START(cpu_arm946_do_idle)
 	mcr	p15, 0, r0, c7, c0, 4		@ Wait for interrupt
 	ret	lr
+SYM_FUNC_END(cpu_arm946_do_idle)
 
 /*
  *	flush_icache_all()
@@ -314,7 +320,7 @@ SYM_TYPED_FUNC_START(arm946_dma_unmap_area)
 	ret	lr
 SYM_FUNC_END(arm946_dma_unmap_area)
 
-ENTRY(cpu_arm946_dcache_clean_area)
+SYM_TYPED_FUNC_START(cpu_arm946_dcache_clean_area)
 #ifndef CONFIG_CPU_DCACHE_WRITETHROUGH
 1:	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
 	add	r0, r0, #CACHE_DLINESIZE
@@ -323,6 +329,7 @@ ENTRY(cpu_arm946_dcache_clean_area)
 #endif
 	mcr	p15, 0, r0, c7, c10, 4		@ drain WB
 	ret	lr
+SYM_FUNC_END(cpu_arm946_dcache_clean_area)
 
 	.type	__arm946_setup, #function
 __arm946_setup:
diff --git a/arch/arm/mm/proc-arm9tdmi.S b/arch/arm/mm/proc-arm9tdmi.S
index a054c0e9c034..c480a8400eff 100644
--- a/arch/arm/mm/proc-arm9tdmi.S
+++ b/arch/arm/mm/proc-arm9tdmi.S
@@ -6,6 +6,7 @@
  */
 #include <linux/linkage.h>
 #include <linux/init.h>
+#include <linux/cfi_types.h>
 #include <linux/pgtable.h>
 #include <asm/assembler.h>
 #include <asm/asm-offsets.h>
@@ -24,17 +25,28 @@
  *
  * These are not required.
  */
-ENTRY(cpu_arm9tdmi_proc_init)
-ENTRY(cpu_arm9tdmi_do_idle)
-ENTRY(cpu_arm9tdmi_dcache_clean_area)
-ENTRY(cpu_arm9tdmi_switch_mm)
+SYM_TYPED_FUNC_START(cpu_arm9tdmi_proc_init)
 		ret	lr
+SYM_FUNC_END(cpu_arm9tdmi_proc_init)
+
+SYM_TYPED_FUNC_START(cpu_arm9tdmi_do_idle)
+		ret	lr
+SYM_FUNC_END(cpu_arm9tdmi_do_idle)
+
+SYM_TYPED_FUNC_START(cpu_arm9tdmi_dcache_clean_area)
+		ret	lr
+SYM_FUNC_END(cpu_arm9tdmi_dcache_clean_area)
+
+SYM_TYPED_FUNC_START(cpu_arm9tdmi_switch_mm)
+		ret	lr
+SYM_FUNC_END(cpu_arm9tdmi_switch_mm)
 
 /*
  * cpu_arm9tdmi_proc_fin()
  */
-ENTRY(cpu_arm9tdmi_proc_fin)
+SYM_TYPED_FUNC_START(cpu_arm9tdmi_proc_fin)
 		ret	lr
+SYM_FUNC_END(cpu_arm9tdmi_proc_fin)
 
 /*
  * Function: cpu_arm9tdmi_reset(loc)
@@ -42,9 +54,9 @@ ENTRY(cpu_arm9tdmi_proc_fin)
  * Purpose : Sets up everything for a reset and jump to the location for soft reset.
  */
 		.pushsection	.idmap.text, "ax"
-ENTRY(cpu_arm9tdmi_reset)
+SYM_TYPED_FUNC_START(cpu_arm9tdmi_reset)
 		ret	r0
-ENDPROC(cpu_arm9tdmi_reset)
+SYM_FUNC_END(cpu_arm9tdmi_reset)
 		.popsection
 
 		.type	__arm9tdmi_setup, #function
diff --git a/arch/arm/mm/proc-fa526.S b/arch/arm/mm/proc-fa526.S
index 7729e4710194..7c16ccac8a05 100644
--- a/arch/arm/mm/proc-fa526.S
+++ b/arch/arm/mm/proc-fa526.S
@@ -27,13 +27,14 @@
 /*
  * cpu_fa526_proc_init()
  */
-ENTRY(cpu_fa526_proc_init)
+SYM_TYPED_FUNC_START(cpu_fa526_proc_init)
 	ret	lr
+SYM_FUNC_END(cpu_fa526_proc_init)
 
 /*
  * cpu_fa526_proc_fin()
  */
-ENTRY(cpu_fa526_proc_fin)
+SYM_TYPED_FUNC_START(cpu_fa526_proc_fin)
 	mrc	p15, 0, r0, c1, c0, 0		@ ctrl register
 	bic	r0, r0, #0x1000			@ ...i............
 	bic	r0, r0, #0x000e			@ ............wca.
@@ -41,6 +42,7 @@ ENTRY(cpu_fa526_proc_fin)
 	nop
 	nop
 	ret	lr
+SYM_FUNC_END(cpu_fa526_proc_fin)
 
 /*
  * cpu_fa526_reset(loc)
@@ -53,7 +55,7 @@ ENTRY(cpu_fa526_proc_fin)
  */
 	.align	4
 	.pushsection	.idmap.text, "ax"
-ENTRY(cpu_fa526_reset)
+SYM_TYPED_FUNC_START(cpu_fa526_reset)
 /* TODO: Use CP8 if possible... */
 	mov	ip, #0
 	mcr	p15, 0, ip, c7, c7, 0		@ invalidate I,D caches
@@ -69,24 +71,25 @@ ENTRY(cpu_fa526_reset)
 	nop
 	nop
 	ret	r0
-ENDPROC(cpu_fa526_reset)
+SYM_FUNC_END(cpu_fa526_reset)
 	.popsection
 
 /*
  * cpu_fa526_do_idle()
  */
 	.align	4
-ENTRY(cpu_fa526_do_idle)
+SYM_TYPED_FUNC_START(cpu_fa526_do_idle)
 	ret	lr
+SYM_FUNC_END(cpu_fa526_do_idle)
 
-
-ENTRY(cpu_fa526_dcache_clean_area)
+SYM_TYPED_FUNC_START(cpu_fa526_dcache_clean_area)
 1:	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
 	add	r0, r0, #CACHE_DLINESIZE
 	subs	r1, r1, #CACHE_DLINESIZE
 	bhi	1b
 	mcr	p15, 0, r0, c7, c10, 4		@ drain WB
 	ret	lr
+SYM_FUNC_END(cpu_fa526_dcache_clean_area)
 
 /* =============================== PageTable ============================== */
 
@@ -98,7 +101,7 @@ ENTRY(cpu_fa526_dcache_clean_area)
  * pgd: new page tables
  */
 	.align	4
-ENTRY(cpu_fa526_switch_mm)
+SYM_TYPED_FUNC_START(cpu_fa526_switch_mm)
 #ifdef CONFIG_MMU
 	mov	ip, #0
 #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
@@ -114,6 +117,7 @@ ENTRY(cpu_fa526_switch_mm)
 	mcr	p15, 0, ip, c8, c7, 0		@ invalidate UTLB
 #endif
 	ret	lr
+SYM_FUNC_END(cpu_fa526_switch_mm)
 
 /*
  * cpu_fa526_set_pte_ext(ptep, pte, ext)
@@ -121,7 +125,7 @@ ENTRY(cpu_fa526_switch_mm)
  * Set a PTE and flush it out
  */
 	.align	4
-ENTRY(cpu_fa526_set_pte_ext)
+SYM_TYPED_FUNC_START(cpu_fa526_set_pte_ext)
 #ifdef CONFIG_MMU
 	armv3_set_pte_ext
 	mov	r0, r0
@@ -130,6 +134,7 @@ ENTRY(cpu_fa526_set_pte_ext)
 	mcr	p15, 0, r0, c7, c10, 4		@ drain WB
 #endif
 	ret	lr
+SYM_FUNC_END(cpu_fa526_set_pte_ext)
 
 	.type	__fa526_setup, #function
 __fa526_setup:
diff --git a/arch/arm/mm/proc-feroceon.S b/arch/arm/mm/proc-feroceon.S
index 16d0b7a600fa..3f7f336f7284 100644
--- a/arch/arm/mm/proc-feroceon.S
+++ b/arch/arm/mm/proc-feroceon.S
@@ -44,7 +44,7 @@ __cache_params:
 /*
  * cpu_feroceon_proc_init()
  */
-ENTRY(cpu_feroceon_proc_init)
+SYM_TYPED_FUNC_START(cpu_feroceon_proc_init)
 	mrc	p15, 0, r0, c0, c0, 1		@ read cache type register
 	ldr	r1, __cache_params
 	mov	r2, #(16 << 5)
@@ -62,11 +62,12 @@ ENTRY(cpu_feroceon_proc_init)
 	str_l	r1, VFP_arch_feroceon, r2
 #endif
 	ret	lr
+SYM_FUNC_END(cpu_feroceon_proc_init)
 
 /*
  * cpu_feroceon_proc_fin()
  */
-ENTRY(cpu_feroceon_proc_fin)
+SYM_TYPED_FUNC_START(cpu_feroceon_proc_fin)
 #if defined(CONFIG_CACHE_FEROCEON_L2) && \
 	!defined(CONFIG_CACHE_FEROCEON_L2_WRITETHROUGH)
 	mov	r0, #0
@@ -79,6 +80,7 @@ ENTRY(cpu_feroceon_proc_fin)
 	bic	r0, r0, #0x000e			@ ............wca.
 	mcr	p15, 0, r0, c1, c0, 0		@ disable caches
 	ret	lr
+SYM_FUNC_END(cpu_feroceon_proc_fin)
 
 /*
  * cpu_feroceon_reset(loc)
@@ -91,7 +93,7 @@ ENTRY(cpu_feroceon_proc_fin)
  */
 	.align	5
 	.pushsection	.idmap.text, "ax"
-ENTRY(cpu_feroceon_reset)
+SYM_TYPED_FUNC_START(cpu_feroceon_reset)
 	mov	ip, #0
 	mcr	p15, 0, ip, c7, c7, 0		@ invalidate I,D caches
 	mcr	p15, 0, ip, c7, c10, 4		@ drain WB
@@ -103,7 +105,7 @@ ENTRY(cpu_feroceon_reset)
 	bic	ip, ip, #0x1100			@ ...i...s........
 	mcr	p15, 0, ip, c1, c0, 0		@ ctrl register
 	ret	r0
-ENDPROC(cpu_feroceon_reset)
+SYM_FUNC_END(cpu_feroceon_reset)
 	.popsection
 
 /*
@@ -112,11 +114,12 @@ ENDPROC(cpu_feroceon_reset)
  * Called with IRQs disabled
  */
 	.align	5
-ENTRY(cpu_feroceon_do_idle)
+SYM_TYPED_FUNC_START(cpu_feroceon_do_idle)
 	mov	r0, #0
 	mcr	p15, 0, r0, c7, c10, 4		@ Drain write buffer
 	mcr	p15, 0, r0, c7, c0, 4		@ Wait for interrupt
 	ret	lr
+SYM_FUNC_END(cpu_feroceon_do_idle)
 
 /*
  *	flush_icache_all()
@@ -417,7 +420,7 @@ SYM_TYPED_FUNC_START(feroceon_dma_unmap_area)
 SYM_FUNC_END(feroceon_dma_unmap_area)
 
 	.align	5
-ENTRY(cpu_feroceon_dcache_clean_area)
+SYM_TYPED_FUNC_START(cpu_feroceon_dcache_clean_area)
 #if defined(CONFIG_CACHE_FEROCEON_L2) && \
 	!defined(CONFIG_CACHE_FEROCEON_L2_WRITETHROUGH)
 	mov	r2, r0
@@ -436,6 +439,7 @@ ENTRY(cpu_feroceon_dcache_clean_area)
 #endif
 	mcr	p15, 0, r0, c7, c10, 4		@ drain WB
 	ret	lr
+SYM_FUNC_END(cpu_feroceon_dcache_clean_area)
 
 /* =============================== PageTable ============================== */
 
@@ -447,7 +451,7 @@ ENTRY(cpu_feroceon_dcache_clean_area)
  * pgd: new page tables
  */
 	.align	5
-ENTRY(cpu_feroceon_switch_mm)
+SYM_TYPED_FUNC_START(cpu_feroceon_switch_mm)
 #ifdef CONFIG_MMU
 	/*
 	 * Note: we wish to call __flush_whole_cache but we need to preserve
@@ -468,6 +472,7 @@ ENTRY(cpu_feroceon_switch_mm)
 #else
 	ret	lr
 #endif
+SYM_FUNC_END(cpu_feroceon_switch_mm)
 
 /*
  * cpu_feroceon_set_pte_ext(ptep, pte, ext)
@@ -475,7 +480,7 @@ ENTRY(cpu_feroceon_switch_mm)
  * Set a PTE and flush it out
  */
 	.align	5
-ENTRY(cpu_feroceon_set_pte_ext)
+SYM_TYPED_FUNC_START(cpu_feroceon_set_pte_ext)
 #ifdef CONFIG_MMU
 	armv3_set_pte_ext wc_disable=0
 	mov	r0, r0
@@ -487,21 +492,22 @@ ENTRY(cpu_feroceon_set_pte_ext)
 	mcr	p15, 0, r0, c7, c10, 4		@ drain WB
 #endif
 	ret	lr
+SYM_FUNC_END(cpu_feroceon_set_pte_ext)
 
 /* Suspend/resume support: taken from arch/arm/mm/proc-arm926.S */
 .globl	cpu_feroceon_suspend_size
 .equ	cpu_feroceon_suspend_size, 4 * 3
 #ifdef CONFIG_ARM_CPU_SUSPEND
-ENTRY(cpu_feroceon_do_suspend)
+SYM_TYPED_FUNC_START(cpu_feroceon_do_suspend)
 	stmfd	sp!, {r4 - r6, lr}
 	mrc	p15, 0, r4, c13, c0, 0	@ PID
 	mrc	p15, 0, r5, c3, c0, 0	@ Domain ID
 	mrc	p15, 0, r6, c1, c0, 0	@ Control register
 	stmia	r0, {r4 - r6}
 	ldmfd	sp!, {r4 - r6, pc}
-ENDPROC(cpu_feroceon_do_suspend)
+SYM_FUNC_END(cpu_feroceon_do_suspend)
 
-ENTRY(cpu_feroceon_do_resume)
+SYM_TYPED_FUNC_START(cpu_feroceon_do_resume)
 	mov	ip, #0
 	mcr	p15, 0, ip, c8, c7, 0	@ invalidate I+D TLBs
 	mcr	p15, 0, ip, c7, c7, 0	@ invalidate I+D caches
@@ -511,7 +517,7 @@ ENTRY(cpu_feroceon_do_resume)
 	mcr	p15, 0, r1, c2, c0, 0	@ TTB address
 	mov	r0, r6			@ control register
 	b	cpu_resume_mmu
-ENDPROC(cpu_feroceon_do_resume)
+SYM_FUNC_END(cpu_feroceon_do_resume)
 #endif
 
 	.type	__feroceon_setup, #function
diff --git a/arch/arm/mm/proc-mohawk.S b/arch/arm/mm/proc-mohawk.S
index 1d4b54f9bf7a..a10640b2d065 100644
--- a/arch/arm/mm/proc-mohawk.S
+++ b/arch/arm/mm/proc-mohawk.S
@@ -32,18 +32,20 @@
 /*
  * cpu_mohawk_proc_init()
  */
-ENTRY(cpu_mohawk_proc_init)
+SYM_TYPED_FUNC_START(cpu_mohawk_proc_init)
 	ret	lr
+SYM_FUNC_END(cpu_mohawk_proc_init)
 
 /*
  * cpu_mohawk_proc_fin()
  */
-ENTRY(cpu_mohawk_proc_fin)
+SYM_TYPED_FUNC_START(cpu_mohawk_proc_fin)
 	mrc	p15, 0, r0, c1, c0, 0		@ ctrl register
 	bic	r0, r0, #0x1800			@ ...iz...........
 	bic	r0, r0, #0x0006			@ .............ca.
 	mcr	p15, 0, r0, c1, c0, 0		@ disable caches
 	ret	lr
+SYM_FUNC_END(cpu_mohawk_proc_fin)
 
 /*
  * cpu_mohawk_reset(loc)
@@ -58,7 +60,7 @@ ENTRY(cpu_mohawk_proc_fin)
  */
 	.align	5
 	.pushsection	.idmap.text, "ax"
-ENTRY(cpu_mohawk_reset)
+SYM_TYPED_FUNC_START(cpu_mohawk_reset)
 	mov	ip, #0
 	mcr	p15, 0, ip, c7, c7, 0		@ invalidate I,D caches
 	mcr	p15, 0, ip, c7, c10, 4		@ drain WB
@@ -68,7 +70,7 @@ ENTRY(cpu_mohawk_reset)
 	bic	ip, ip, #0x1100			@ ...i...s........
 	mcr	p15, 0, ip, c1, c0, 0		@ ctrl register
 	ret	r0
-ENDPROC(cpu_mohawk_reset)
+SYM_FUNC_END(cpu_mohawk_reset)
 	.popsection
 
 /*
@@ -77,11 +79,12 @@ ENDPROC(cpu_mohawk_reset)
  * Called with IRQs disabled
  */
 	.align	5
-ENTRY(cpu_mohawk_do_idle)
+SYM_TYPED_FUNC_START(cpu_mohawk_do_idle)
 	mov	r0, #0
 	mcr	p15, 0, r0, c7, c10, 4		@ drain write buffer
 	mcr	p15, 0, r0, c7, c0, 4		@ wait for interrupt
 	ret	lr
+SYM_FUNC_END(cpu_mohawk_do_idle)
 
 /*
  *	flush_icache_all()
@@ -298,13 +301,14 @@ SYM_TYPED_FUNC_START(mohawk_dma_unmap_area)
 	ret	lr
 SYM_FUNC_END(mohawk_dma_unmap_area)
 
-ENTRY(cpu_mohawk_dcache_clean_area)
+SYM_TYPED_FUNC_START(cpu_mohawk_dcache_clean_area)
 1:	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
 	add	r0, r0, #CACHE_DLINESIZE
 	subs	r1, r1, #CACHE_DLINESIZE
 	bhi	1b
 	mcr	p15, 0, r0, c7, c10, 4		@ drain WB
 	ret	lr
+SYM_FUNC_END(cpu_mohawk_dcache_clean_area)
 
 /*
  * cpu_mohawk_switch_mm(pgd)
@@ -314,7 +318,7 @@ ENTRY(cpu_mohawk_dcache_clean_area)
  * pgd: new page tables
  */
 	.align	5
-ENTRY(cpu_mohawk_switch_mm)
+SYM_TYPED_FUNC_START(cpu_mohawk_switch_mm)
 	mov	ip, #0
 	mcr	p15, 0, ip, c7, c14, 0		@ clean & invalidate all D cache
 	mcr	p15, 0, ip, c7, c5, 0		@ invalidate I cache
@@ -323,6 +327,7 @@ ENTRY(cpu_mohawk_switch_mm)
 	mcr	p15, 0, r0, c2, c0, 0		@ load page table pointer
 	mcr	p15, 0, ip, c8, c7, 0		@ invalidate I & D TLBs
 	ret	lr
+SYM_FUNC_END(cpu_mohawk_switch_mm)
 
 /*
  * cpu_mohawk_set_pte_ext(ptep, pte, ext)
@@ -330,7 +335,7 @@ ENTRY(cpu_mohawk_switch_mm)
  * Set a PTE and flush it out
  */
 	.align	5
-ENTRY(cpu_mohawk_set_pte_ext)
+SYM_TYPED_FUNC_START(cpu_mohawk_set_pte_ext)
 #ifdef CONFIG_MMU
 	armv3_set_pte_ext
 	mov	r0, r0
@@ -338,11 +343,12 @@ ENTRY(cpu_mohawk_set_pte_ext)
 	mcr	p15, 0, r0, c7, c10, 4		@ drain WB
 	ret	lr
 #endif
+SYM_FUNC_END(cpu_mohawk_set_pte_ext)
 
 .globl	cpu_mohawk_suspend_size
 .equ	cpu_mohawk_suspend_size, 4 * 6
 #ifdef CONFIG_ARM_CPU_SUSPEND
-ENTRY(cpu_mohawk_do_suspend)
+SYM_TYPED_FUNC_START(cpu_mohawk_do_suspend)
 	stmfd	sp!, {r4 - r9, lr}
 	mrc	p14, 0, r4, c6, c0, 0	@ clock configuration, for turbo mode
 	mrc	p15, 0, r5, c15, c1, 0	@ CP access reg
@@ -353,9 +359,9 @@ ENTRY(cpu_mohawk_do_suspend)
 	bic	r4, r4, #2		@ clear frequency change bit
 	stmia	r0, {r4 - r9}		@ store cp regs
 	ldmia	sp!, {r4 - r9, pc}
-ENDPROC(cpu_mohawk_do_suspend)
+SYM_FUNC_END(cpu_mohawk_do_suspend)
 
-ENTRY(cpu_mohawk_do_resume)
+SYM_TYPED_FUNC_START(cpu_mohawk_do_resume)
 	ldmia	r0, {r4 - r9}		@ load cp regs
 	mov	ip, #0
 	mcr	p15, 0, ip, c7, c7, 0	@ invalidate I & D caches, BTB
@@ -371,7 +377,7 @@ ENTRY(cpu_mohawk_do_resume)
 	mcr	p15, 0, r8, c1, c0, 1	@ auxiliary control reg
 	mov	r0, r9			@ control register
 	b	cpu_resume_mmu
-ENDPROC(cpu_mohawk_do_resume)
+SYM_FUNC_END(cpu_mohawk_do_resume)
 #endif
 
 	.type	__mohawk_setup, #function
diff --git a/arch/arm/mm/proc-sa110.S b/arch/arm/mm/proc-sa110.S
index 4071f7a61cb6..3da76fab8ac3 100644
--- a/arch/arm/mm/proc-sa110.S
+++ b/arch/arm/mm/proc-sa110.S
@@ -12,6 +12,7 @@
  */
 #include <linux/linkage.h>
 #include <linux/init.h>
+#include <linux/cfi_types.h>
 #include <linux/pgtable.h>
 #include <asm/assembler.h>
 #include <asm/asm-offsets.h>
@@ -32,15 +33,16 @@
 /*
  * cpu_sa110_proc_init()
  */
-ENTRY(cpu_sa110_proc_init)
+SYM_TYPED_FUNC_START(cpu_sa110_proc_init)
 	mov	r0, #0
 	mcr	p15, 0, r0, c15, c1, 2		@ Enable clock switching
 	ret	lr
+SYM_FUNC_END(cpu_sa110_proc_init)
 
 /*
  * cpu_sa110_proc_fin()
  */
-ENTRY(cpu_sa110_proc_fin)
+SYM_TYPED_FUNC_START(cpu_sa110_proc_fin)
 	mov	r0, #0
 	mcr	p15, 0, r0, c15, c2, 2		@ Disable clock switching
 	mrc	p15, 0, r0, c1, c0, 0		@ ctrl register
@@ -48,6 +50,7 @@ ENTRY(cpu_sa110_proc_fin)
 	bic	r0, r0, #0x000e			@ ............wca.
 	mcr	p15, 0, r0, c1, c0, 0		@ disable caches
 	ret	lr
+SYM_FUNC_END(cpu_sa110_proc_fin)
 
 /*
  * cpu_sa110_reset(loc)
@@ -60,7 +63,7 @@ ENTRY(cpu_sa110_proc_fin)
  */
 	.align	5
 	.pushsection	.idmap.text, "ax"
-ENTRY(cpu_sa110_reset)
+SYM_TYPED_FUNC_START(cpu_sa110_reset)
 	mov	ip, #0
 	mcr	p15, 0, ip, c7, c7, 0		@ invalidate I,D caches
 	mcr	p15, 0, ip, c7, c10, 4		@ drain WB
@@ -72,7 +75,7 @@ ENTRY(cpu_sa110_reset)
 	bic	ip, ip, #0x1100			@ ...i...s........
 	mcr	p15, 0, ip, c1, c0, 0		@ ctrl register
 	ret	r0
-ENDPROC(cpu_sa110_reset)
+SYM_FUNC_END(cpu_sa110_reset)
 	.popsection
 
 /*
@@ -88,7 +91,7 @@ ENDPROC(cpu_sa110_reset)
  */
 	.align	5
 
-ENTRY(cpu_sa110_do_idle)
+SYM_TYPED_FUNC_START(cpu_sa110_do_idle)
 	mcr	p15, 0, ip, c15, c2, 2		@ disable clock switching
 	ldr	r1, =UNCACHEABLE_ADDR		@ load from uncacheable loc
 	ldr	r1, [r1, #0]			@ force switch to MCLK
@@ -101,6 +104,7 @@ ENTRY(cpu_sa110_do_idle)
 	mov	r0, r0				@ safety
 	mcr	p15, 0, r0, c15, c1, 2		@ enable clock switching
 	ret	lr
+SYM_FUNC_END(cpu_sa110_do_idle)
 
 /* ================================= CACHE ================================ */
 
@@ -113,12 +117,13 @@ ENTRY(cpu_sa110_do_idle)
  * addr: cache-unaligned virtual address
  */
 	.align	5
-ENTRY(cpu_sa110_dcache_clean_area)
+SYM_TYPED_FUNC_START(cpu_sa110_dcache_clean_area)
 1:	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
 	add	r0, r0, #DCACHELINESIZE
 	subs	r1, r1, #DCACHELINESIZE
 	bhi	1b
 	ret	lr
+SYM_FUNC_END(cpu_sa110_dcache_clean_area)
 
 /* =============================== PageTable ============================== */
 
@@ -130,7 +135,7 @@ ENTRY(cpu_sa110_dcache_clean_area)
  * pgd: new page tables
  */
 	.align	5
-ENTRY(cpu_sa110_switch_mm)
+SYM_TYPED_FUNC_START(cpu_sa110_switch_mm)
 #ifdef CONFIG_MMU
 	str	lr, [sp, #-4]!
 	bl	v4wb_flush_kern_cache_all	@ clears IP
@@ -140,6 +145,7 @@ ENTRY(cpu_sa110_switch_mm)
 #else
 	ret	lr
 #endif
+SYM_FUNC_END(cpu_sa110_switch_mm)
 
 /*
  * cpu_sa110_set_pte_ext(ptep, pte, ext)
@@ -147,7 +153,7 @@ ENTRY(cpu_sa110_switch_mm)
  * Set a PTE and flush it out
  */
 	.align	5
-ENTRY(cpu_sa110_set_pte_ext)
+SYM_TYPED_FUNC_START(cpu_sa110_set_pte_ext)
 #ifdef CONFIG_MMU
 	armv3_set_pte_ext wc_disable=0
 	mov	r0, r0
@@ -155,6 +161,7 @@ ENTRY(cpu_sa110_set_pte_ext)
 	mcr	p15, 0, r0, c7, c10, 4		@ drain WB
 #endif
 	ret	lr
+SYM_FUNC_END(cpu_sa110_set_pte_ext)
 
 	.type	__sa110_setup, #function
 __sa110_setup:
diff --git a/arch/arm/mm/proc-sa1100.S b/arch/arm/mm/proc-sa1100.S
index e723bd4119d3..7c496195e440 100644
--- a/arch/arm/mm/proc-sa1100.S
+++ b/arch/arm/mm/proc-sa1100.S
@@ -17,6 +17,7 @@
  */
 #include <linux/linkage.h>
 #include <linux/init.h>
+#include <linux/cfi_types.h>
 #include <linux/pgtable.h>
 #include <asm/assembler.h>
 #include <asm/asm-offsets.h>
@@ -36,11 +37,12 @@
 /*
  * cpu_sa1100_proc_init()
  */
-ENTRY(cpu_sa1100_proc_init)
+SYM_TYPED_FUNC_START(cpu_sa1100_proc_init)
 	mov	r0, #0
 	mcr	p15, 0, r0, c15, c1, 2		@ Enable clock switching
 	mcr	p15, 0, r0, c9, c0, 5		@ Allow read-buffer operations from userland
 	ret	lr
+SYM_FUNC_END(cpu_sa1100_proc_init)
 
 /*
  * cpu_sa1100_proc_fin()
@@ -49,13 +51,14 @@ ENTRY(cpu_sa1100_proc_init)
  *  - Disable interrupts
  *  - Clean and turn off caches.
  */
-ENTRY(cpu_sa1100_proc_fin)
+SYM_TYPED_FUNC_START(cpu_sa1100_proc_fin)
 	mcr	p15, 0, ip, c15, c2, 2		@ Disable clock switching
 	mrc	p15, 0, r0, c1, c0, 0		@ ctrl register
 	bic	r0, r0, #0x1000			@ ...i............
 	bic	r0, r0, #0x000e			@ ............wca.
 	mcr	p15, 0, r0, c1, c0, 0		@ disable caches
 	ret	lr
+SYM_FUNC_END(cpu_sa1100_proc_fin)
 
 /*
  * cpu_sa1100_reset(loc)
@@ -68,7 +71,7 @@ ENTRY(cpu_sa1100_proc_fin)
  */
 	.align	5
 	.pushsection	.idmap.text, "ax"
-ENTRY(cpu_sa1100_reset)
+SYM_TYPED_FUNC_START(cpu_sa1100_reset)
 	mov	ip, #0
 	mcr	p15, 0, ip, c7, c7, 0		@ invalidate I,D caches
 	mcr	p15, 0, ip, c7, c10, 4		@ drain WB
@@ -80,7 +83,7 @@ ENTRY(cpu_sa1100_reset)
 	bic	ip, ip, #0x1100			@ ...i...s........
 	mcr	p15, 0, ip, c1, c0, 0		@ ctrl register
 	ret	r0
-ENDPROC(cpu_sa1100_reset)
+SYM_FUNC_END(cpu_sa1100_reset)
 	.popsection
 
 /*
@@ -95,7 +98,7 @@ ENDPROC(cpu_sa1100_reset)
  *   3 = switch to fast processor clock
  */
 	.align	5
-ENTRY(cpu_sa1100_do_idle)
+SYM_TYPED_FUNC_START(cpu_sa1100_do_idle)
 	mov	r0, r0				@ 4 nop padding
 	mov	r0, r0
 	mov	r0, r0
@@ -111,6 +114,7 @@ ENTRY(cpu_sa1100_do_idle)
 	mov	r0, r0				@ safety
 	mcr	p15, 0, r0, c15, c1, 2		@ enable clock switching
 	ret	lr
+SYM_FUNC_END(cpu_sa1100_do_idle)
 
 /* ================================= CACHE ================================ */
 
@@ -123,12 +127,13 @@ ENTRY(cpu_sa1100_do_idle)
  * addr: cache-unaligned virtual address
  */
 	.align	5
-ENTRY(cpu_sa1100_dcache_clean_area)
+SYM_TYPED_FUNC_START(cpu_sa1100_dcache_clean_area)
 1:	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
 	add	r0, r0, #DCACHELINESIZE
 	subs	r1, r1, #DCACHELINESIZE
 	bhi	1b
 	ret	lr
+SYM_FUNC_END(cpu_sa1100_dcache_clean_area)
 
 /* =============================== PageTable ============================== */
 
@@ -140,7 +145,7 @@ ENTRY(cpu_sa1100_dcache_clean_area)
  * pgd: new page tables
  */
 	.align	5
-ENTRY(cpu_sa1100_switch_mm)
+SYM_TYPED_FUNC_START(cpu_sa1100_switch_mm)
 #ifdef CONFIG_MMU
 	str	lr, [sp, #-4]!
 	bl	v4wb_flush_kern_cache_all	@ clears IP
@@ -151,6 +156,7 @@ ENTRY(cpu_sa1100_switch_mm)
 #else
 	ret	lr
 #endif
+SYM_FUNC_END(cpu_sa1100_switch_mm)
 
 /*
  * cpu_sa1100_set_pte_ext(ptep, pte, ext)
@@ -158,7 +164,7 @@ ENTRY(cpu_sa1100_switch_mm)
  * Set a PTE and flush it out
  */
 	.align	5
-ENTRY(cpu_sa1100_set_pte_ext)
+SYM_TYPED_FUNC_START(cpu_sa1100_set_pte_ext)
 #ifdef CONFIG_MMU
 	armv3_set_pte_ext wc_disable=0
 	mov	r0, r0
@@ -166,20 +172,21 @@ ENTRY(cpu_sa1100_set_pte_ext)
 	mcr	p15, 0, r0, c7, c10, 4		@ drain WB
 #endif
 	ret	lr
+SYM_FUNC_END(cpu_sa1100_set_pte_ext)
 
 .globl	cpu_sa1100_suspend_size
 .equ	cpu_sa1100_suspend_size, 4 * 3
 #ifdef CONFIG_ARM_CPU_SUSPEND
-ENTRY(cpu_sa1100_do_suspend)
+SYM_TYPED_FUNC_START(cpu_sa1100_do_suspend)
 	stmfd	sp!, {r4 - r6, lr}
 	mrc	p15, 0, r4, c3, c0, 0		@ domain ID
 	mrc	p15, 0, r5, c13, c0, 0		@ PID
 	mrc	p15, 0, r6, c1, c0, 0		@ control reg
 	stmia	r0, {r4 - r6}			@ store cp regs
 	ldmfd	sp!, {r4 - r6, pc}
-ENDPROC(cpu_sa1100_do_suspend)
+SYM_FUNC_END(cpu_sa1100_do_suspend)
 
-ENTRY(cpu_sa1100_do_resume)
+SYM_TYPED_FUNC_START(cpu_sa1100_do_resume)
 	ldmia	r0, {r4 - r6}			@ load cp regs
 	mov	ip, #0
 	mcr	p15, 0, ip, c8, c7, 0		@ flush I+D TLBs
@@ -192,7 +199,7 @@ ENTRY(cpu_sa1100_do_resume)
 	mcr	p15, 0, r5, c13, c0, 0		@ PID
 	mov	r0, r6				@ control register
 	b	cpu_resume_mmu
-ENDPROC(cpu_sa1100_do_resume)
+SYM_FUNC_END(cpu_sa1100_do_resume)
 #endif
 
 	.type	__sa1100_setup, #function
diff --git a/arch/arm/mm/proc-v6.S b/arch/arm/mm/proc-v6.S
index 203dff89ab1a..90a01f5950b9 100644
--- a/arch/arm/mm/proc-v6.S
+++ b/arch/arm/mm/proc-v6.S
@@ -8,6 +8,7 @@
  *  This is the "shell" of the ARMv6 processor support.
  */
 #include <linux/init.h>
+#include <linux/cfi_types.h>
 #include <linux/linkage.h>
 #include <linux/pgtable.h>
 #include <asm/assembler.h>
@@ -34,15 +35,17 @@
 
 .arch armv6
 
-ENTRY(cpu_v6_proc_init)
+SYM_TYPED_FUNC_START(cpu_v6_proc_init)
 	ret	lr
+SYM_FUNC_END(cpu_v6_proc_init)
 
-ENTRY(cpu_v6_proc_fin)
+SYM_TYPED_FUNC_START(cpu_v6_proc_fin)
 	mrc	p15, 0, r0, c1, c0, 0		@ ctrl register
 	bic	r0, r0, #0x1000			@ ...i............
 	bic	r0, r0, #0x0006			@ .............ca.
 	mcr	p15, 0, r0, c1, c0, 0		@ disable caches
 	ret	lr
+SYM_FUNC_END(cpu_v6_proc_fin)
 
 /*
  *	cpu_v6_reset(loc)
@@ -55,14 +58,14 @@ ENTRY(cpu_v6_proc_fin)
  */
 	.align	5
 	.pushsection	.idmap.text, "ax"
-ENTRY(cpu_v6_reset)
+SYM_TYPED_FUNC_START(cpu_v6_reset)
 	mrc	p15, 0, r1, c1, c0, 0		@ ctrl register
 	bic	r1, r1, #0x1			@ ...............m
 	mcr	p15, 0, r1, c1, c0, 0		@ disable MMU
 	mov	r1, #0
 	mcr	p15, 0, r1, c7, c5, 4		@ ISB
 	ret	r0
-ENDPROC(cpu_v6_reset)
+SYM_FUNC_END(cpu_v6_reset)
 	.popsection
 
 /*
@@ -72,18 +75,20 @@ ENDPROC(cpu_v6_reset)
  *
  *	IRQs are already disabled.
  */
-ENTRY(cpu_v6_do_idle)
+SYM_TYPED_FUNC_START(cpu_v6_do_idle)
 	mov	r1, #0
 	mcr	p15, 0, r1, c7, c10, 4		@ DWB - WFI may enter a low-power mode
 	mcr	p15, 0, r1, c7, c0, 4		@ wait for interrupt
 	ret	lr
+SYM_FUNC_END(cpu_v6_do_idle)
 
-ENTRY(cpu_v6_dcache_clean_area)
+SYM_TYPED_FUNC_START(cpu_v6_dcache_clean_area)
 1:	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
 	add	r0, r0, #D_CACHE_LINE_SIZE
 	subs	r1, r1, #D_CACHE_LINE_SIZE
 	bhi	1b
 	ret	lr
+SYM_FUNC_END(cpu_v6_dcache_clean_area)
 
 /*
  *	cpu_v6_switch_mm(pgd_phys, tsk)
@@ -95,7 +100,7 @@ ENTRY(cpu_v6_dcache_clean_area)
  *	It is assumed that:
  *	- we are not using split page tables
  */
-ENTRY(cpu_v6_switch_mm)
+SYM_TYPED_FUNC_START(cpu_v6_switch_mm)
 #ifdef CONFIG_MMU
 	mov	r2, #0
 	mmid	r1, r1				@ get mm->context.id
@@ -113,6 +118,7 @@ ENTRY(cpu_v6_switch_mm)
 	mcr	p15, 0, r1, c13, c0, 1		@ set context ID
 #endif
 	ret	lr
+SYM_FUNC_END(cpu_v6_switch_mm)
 
 /*
  *	cpu_v6_set_pte_ext(ptep, pte, ext)
@@ -126,17 +132,18 @@ ENTRY(cpu_v6_switch_mm)
  */
 	armv6_mt_table cpu_v6
 
-ENTRY(cpu_v6_set_pte_ext)
+SYM_TYPED_FUNC_START(cpu_v6_set_pte_ext)
 #ifdef CONFIG_MMU
 	armv6_set_pte_ext cpu_v6
 #endif
 	ret	lr
+SYM_FUNC_END(cpu_v6_set_pte_ext)
 
 /* Suspend/resume support: taken from arch/arm/mach-s3c64xx/sleep.S */
 .globl	cpu_v6_suspend_size
 .equ	cpu_v6_suspend_size, 4 * 6
 #ifdef CONFIG_ARM_CPU_SUSPEND
-ENTRY(cpu_v6_do_suspend)
+SYM_TYPED_FUNC_START(cpu_v6_do_suspend)
 	stmfd	sp!, {r4 - r9, lr}
 	mrc	p15, 0, r4, c13, c0, 0	@ FCSE/PID
 #ifdef CONFIG_MMU
@@ -148,9 +155,9 @@ ENTRY(cpu_v6_do_suspend)
 	mrc	p15, 0, r9, c1, c0, 0	@ control register
 	stmia	r0, {r4 - r9}
 	ldmfd	sp!, {r4- r9, pc}
-ENDPROC(cpu_v6_do_suspend)
+SYM_FUNC_END(cpu_v6_do_suspend)
 
-ENTRY(cpu_v6_do_resume)
+SYM_TYPED_FUNC_START(cpu_v6_do_resume)
 	mov	ip, #0
 	mcr	p15, 0, ip, c7, c14, 0	@ clean+invalidate D cache
 	mcr	p15, 0, ip, c7, c5, 0	@ invalidate I cache
@@ -172,7 +179,7 @@ ENTRY(cpu_v6_do_resume)
 	mcr	p15, 0, ip, c7, c5, 4	@ ISB
 	mov	r0, r9			@ control register
 	b	cpu_resume_mmu
-ENDPROC(cpu_v6_do_resume)
+SYM_FUNC_END(cpu_v6_do_resume)
 #endif
 
 	string	cpu_v6_name, "ARMv6-compatible processor"
diff --git a/arch/arm/mm/proc-v7-2level.S b/arch/arm/mm/proc-v7-2level.S
index 0a3083ad19c2..1007702fcaf3 100644
--- a/arch/arm/mm/proc-v7-2level.S
+++ b/arch/arm/mm/proc-v7-2level.S
@@ -40,7 +40,7 @@
  *	even on Cortex-A8 revisions not affected by 430973.
  *	If IBE is not set, the flush BTAC/BTB won't do anything.
  */
-ENTRY(cpu_v7_switch_mm)
+SYM_TYPED_FUNC_START(cpu_v7_switch_mm)
 #ifdef CONFIG_MMU
 	mmid	r1, r1				@ get mm->context.id
 	ALT_SMP(orr	r0, r0, #TTB_FLAGS_SMP)
@@ -59,7 +59,7 @@ ENTRY(cpu_v7_switch_mm)
 	isb
 #endif
 	bx	lr
-ENDPROC(cpu_v7_switch_mm)
+SYM_FUNC_END(cpu_v7_switch_mm)
 
 /*
  *	cpu_v7_set_pte_ext(ptep, pte)
@@ -71,7 +71,7 @@ ENDPROC(cpu_v7_switch_mm)
  *	- pte   - PTE value to store
  *	- ext	- value for extended PTE bits
  */
-ENTRY(cpu_v7_set_pte_ext)
+SYM_TYPED_FUNC_START(cpu_v7_set_pte_ext)
 #ifdef CONFIG_MMU
 	str	r1, [r0]			@ linux version
 
@@ -106,7 +106,7 @@ ENTRY(cpu_v7_set_pte_ext)
 	ALT_UP (mcr	p15, 0, r0, c7, c10, 1)		@ flush_pte
 #endif
 	bx	lr
-ENDPROC(cpu_v7_set_pte_ext)
+SYM_FUNC_END(cpu_v7_set_pte_ext)
 
 	/*
 	 * Memory region attributes with SCTLR.TRE=1
diff --git a/arch/arm/mm/proc-v7-3level.S b/arch/arm/mm/proc-v7-3level.S
index 131984462d0d..bdabc15cde56 100644
--- a/arch/arm/mm/proc-v7-3level.S
+++ b/arch/arm/mm/proc-v7-3level.S
@@ -42,7 +42,7 @@
  * Set the translation table base pointer to be pgd_phys (physical address of
  * the new TTB).
  */
-ENTRY(cpu_v7_switch_mm)
+SYM_TYPED_FUNC_START(cpu_v7_switch_mm)
 #ifdef CONFIG_MMU
 	mmid	r2, r2
 	asid	r2, r2
@@ -51,7 +51,7 @@ ENTRY(cpu_v7_switch_mm)
 	isb
 #endif
 	ret	lr
-ENDPROC(cpu_v7_switch_mm)
+SYM_FUNC_END(cpu_v7_switch_mm)
 
 #ifdef __ARMEB__
 #define rl r3
@@ -68,7 +68,7 @@ ENDPROC(cpu_v7_switch_mm)
  * - ptep - pointer to level 3 translation table entry
  * - pte - PTE value to store (64-bit in r2 and r3)
  */
-ENTRY(cpu_v7_set_pte_ext)
+SYM_TYPED_FUNC_START(cpu_v7_set_pte_ext)
 #ifdef CONFIG_MMU
 	tst	rl, #L_PTE_VALID
 	beq	1f
@@ -87,7 +87,7 @@ ENTRY(cpu_v7_set_pte_ext)
 	ALT_UP (mcr	p15, 0, r0, c7, c10, 1)		@ flush_pte
 #endif
 	ret	lr
-ENDPROC(cpu_v7_set_pte_ext)
+SYM_FUNC_END(cpu_v7_set_pte_ext)
 
 	/*
 	 * Memory region attributes for LPAE (defined in pgtable-3level.h):
diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S
index 193c7aeb6703..5fb9a6aecb00 100644
--- a/arch/arm/mm/proc-v7.S
+++ b/arch/arm/mm/proc-v7.S
@@ -7,6 +7,7 @@
  *  This is the "shell" of the ARMv7 processor support.
  */
 #include <linux/arm-smccc.h>
+#include <linux/cfi_types.h>
 #include <linux/init.h>
 #include <linux/linkage.h>
 #include <linux/pgtable.h>
@@ -26,17 +27,17 @@
 
 .arch armv7-a
 
-ENTRY(cpu_v7_proc_init)
+SYM_TYPED_FUNC_START(cpu_v7_proc_init)
 	ret	lr
-ENDPROC(cpu_v7_proc_init)
+SYM_FUNC_END(cpu_v7_proc_init)
 
-ENTRY(cpu_v7_proc_fin)
+SYM_TYPED_FUNC_START(cpu_v7_proc_fin)
 	mrc	p15, 0, r0, c1, c0, 0		@ ctrl register
 	bic	r0, r0, #0x1000			@ ...i............
 	bic	r0, r0, #0x0006			@ .............ca.
 	mcr	p15, 0, r0, c1, c0, 0		@ disable caches
 	ret	lr
-ENDPROC(cpu_v7_proc_fin)
+SYM_FUNC_END(cpu_v7_proc_fin)
 
 /*
  *	cpu_v7_reset(loc, hyp)
@@ -53,7 +54,7 @@ ENDPROC(cpu_v7_proc_fin)
  */
 	.align	5
 	.pushsection	.idmap.text, "ax"
-ENTRY(cpu_v7_reset)
+SYM_TYPED_FUNC_START(cpu_v7_reset)
 	mrc	p15, 0, r2, c1, c0, 0		@ ctrl register
 	bic	r2, r2, #0x1			@ ...............m
  THUMB(	bic	r2, r2, #1 << 30 )		@ SCTLR.TE (Thumb exceptions)
@@ -64,7 +65,7 @@ ENTRY(cpu_v7_reset)
 	bne	__hyp_soft_restart
 #endif
 	bx	r0
-ENDPROC(cpu_v7_reset)
+SYM_FUNC_END(cpu_v7_reset)
 	.popsection
 
 /*
@@ -74,13 +75,13 @@ ENDPROC(cpu_v7_reset)
  *
  *	IRQs are already disabled.
  */
-ENTRY(cpu_v7_do_idle)
+SYM_TYPED_FUNC_START(cpu_v7_do_idle)
 	dsb					@ WFI may enter a low-power mode
 	wfi
 	ret	lr
-ENDPROC(cpu_v7_do_idle)
+SYM_FUNC_END(cpu_v7_do_idle)
 
-ENTRY(cpu_v7_dcache_clean_area)
+SYM_TYPED_FUNC_START(cpu_v7_dcache_clean_area)
 	ALT_SMP(W(nop))			@ MP extensions imply L1 PTW
 	ALT_UP_B(1f)
 	ret	lr
@@ -91,38 +92,39 @@ ENTRY(cpu_v7_dcache_clean_area)
 	bhi	2b
 	dsb	ishst
 	ret	lr
-ENDPROC(cpu_v7_dcache_clean_area)
+SYM_FUNC_END(cpu_v7_dcache_clean_area)
 
 #ifdef CONFIG_ARM_PSCI
 	.arch_extension sec
-ENTRY(cpu_v7_smc_switch_mm)
+SYM_TYPED_FUNC_START(cpu_v7_smc_switch_mm)
 	stmfd	sp!, {r0 - r3}
 	movw	r0, #:lower16:ARM_SMCCC_ARCH_WORKAROUND_1
 	movt	r0, #:upper16:ARM_SMCCC_ARCH_WORKAROUND_1
 	smc	#0
 	ldmfd	sp!, {r0 - r3}
 	b	cpu_v7_switch_mm
-ENDPROC(cpu_v7_smc_switch_mm)
+SYM_FUNC_END(cpu_v7_smc_switch_mm)
 	.arch_extension virt
-ENTRY(cpu_v7_hvc_switch_mm)
+SYM_TYPED_FUNC_START(cpu_v7_hvc_switch_mm)
 	stmfd	sp!, {r0 - r3}
 	movw	r0, #:lower16:ARM_SMCCC_ARCH_WORKAROUND_1
 	movt	r0, #:upper16:ARM_SMCCC_ARCH_WORKAROUND_1
 	hvc	#0
 	ldmfd	sp!, {r0 - r3}
 	b	cpu_v7_switch_mm
-ENDPROC(cpu_v7_hvc_switch_mm)
+SYM_FUNC_END(cpu_v7_hvc_switch_mm)
 #endif
-ENTRY(cpu_v7_iciallu_switch_mm)
+
+SYM_TYPED_FUNC_START(cpu_v7_iciallu_switch_mm)
 	mov	r3, #0
 	mcr	p15, 0, r3, c7, c5, 0		@ ICIALLU
 	b	cpu_v7_switch_mm
-ENDPROC(cpu_v7_iciallu_switch_mm)
-ENTRY(cpu_v7_bpiall_switch_mm)
+SYM_FUNC_END(cpu_v7_iciallu_switch_mm)
+SYM_TYPED_FUNC_START(cpu_v7_bpiall_switch_mm)
 	mov	r3, #0
 	mcr	p15, 0, r3, c7, c5, 6		@ flush BTAC/BTB
 	b	cpu_v7_switch_mm
-ENDPROC(cpu_v7_bpiall_switch_mm)
+SYM_FUNC_END(cpu_v7_bpiall_switch_mm)
 
 	string	cpu_v7_name, "ARMv7 Processor"
 	.align
@@ -131,7 +133,7 @@ ENDPROC(cpu_v7_bpiall_switch_mm)
 .globl	cpu_v7_suspend_size
 .equ	cpu_v7_suspend_size, 4 * 9
 #ifdef CONFIG_ARM_CPU_SUSPEND
-ENTRY(cpu_v7_do_suspend)
+SYM_TYPED_FUNC_START(cpu_v7_do_suspend)
 	stmfd	sp!, {r4 - r11, lr}
 	mrc	p15, 0, r4, c13, c0, 0	@ FCSE/PID
 	mrc	p15, 0, r5, c13, c0, 3	@ User r/o thread ID
@@ -150,9 +152,9 @@ ENTRY(cpu_v7_do_suspend)
 	mrc	p15, 0, r10, c1, c0, 2	@ Co-processor access control
 	stmia	r0, {r5 - r11}
 	ldmfd	sp!, {r4 - r11, pc}
-ENDPROC(cpu_v7_do_suspend)
+SYM_FUNC_END(cpu_v7_do_suspend)
 
-ENTRY(cpu_v7_do_resume)
+SYM_TYPED_FUNC_START(cpu_v7_do_resume)
 	mov	ip, #0
 	mcr	p15, 0, ip, c7, c5, 0	@ invalidate I cache
 	mcr	p15, 0, ip, c13, c0, 1	@ set reserved context ID
@@ -186,22 +188,22 @@ ENTRY(cpu_v7_do_resume)
 	dsb
 	mov	r0, r8			@ control register
 	b	cpu_resume_mmu
-ENDPROC(cpu_v7_do_resume)
+SYM_FUNC_END(cpu_v7_do_resume)
 #endif
 
 .globl	cpu_ca9mp_suspend_size
 .equ	cpu_ca9mp_suspend_size, cpu_v7_suspend_size + 4 * 2
 #ifdef CONFIG_ARM_CPU_SUSPEND
-ENTRY(cpu_ca9mp_do_suspend)
+SYM_TYPED_FUNC_START(cpu_ca9mp_do_suspend)
 	stmfd	sp!, {r4 - r5}
 	mrc	p15, 0, r4, c15, c0, 1		@ Diagnostic register
 	mrc	p15, 0, r5, c15, c0, 0		@ Power register
 	stmia	r0!, {r4 - r5}
 	ldmfd	sp!, {r4 - r5}
 	b	cpu_v7_do_suspend
-ENDPROC(cpu_ca9mp_do_suspend)
+SYM_FUNC_END(cpu_ca9mp_do_suspend)
 
-ENTRY(cpu_ca9mp_do_resume)
+SYM_TYPED_FUNC_START(cpu_ca9mp_do_resume)
 	ldmia	r0!, {r4 - r5}
 	mrc	p15, 0, r10, c15, c0, 1		@ Read Diagnostic register
 	teq	r4, r10				@ Already restored?
@@ -210,7 +212,7 @@ ENTRY(cpu_ca9mp_do_resume)
 	teq	r5, r10				@ Already restored?
 	mcrne	p15, 0, r5, c15, c0, 0		@ No, so restore it
 	b	cpu_v7_do_resume
-ENDPROC(cpu_ca9mp_do_resume)
+SYM_FUNC_END(cpu_ca9mp_do_resume)
 #endif
 
 #ifdef CONFIG_CPU_PJ4B
@@ -220,18 +222,18 @@ ENDPROC(cpu_ca9mp_do_resume)
 	globl_equ	cpu_pj4b_proc_fin, 	cpu_v7_proc_fin
 	globl_equ	cpu_pj4b_reset,	   	cpu_v7_reset
 #ifdef CONFIG_PJ4B_ERRATA_4742
-ENTRY(cpu_pj4b_do_idle)
+SYM_TYPED_FUNC_START(cpu_pj4b_do_idle)
 	dsb					@ WFI may enter a low-power mode
 	wfi
 	dsb					@barrier
 	ret	lr
-ENDPROC(cpu_pj4b_do_idle)
+SYM_FUNC_END(cpu_pj4b_do_idle)
 #else
 	globl_equ	cpu_pj4b_do_idle,  	cpu_v7_do_idle
 #endif
 	globl_equ	cpu_pj4b_dcache_clean_area,	cpu_v7_dcache_clean_area
 #ifdef CONFIG_ARM_CPU_SUSPEND
-ENTRY(cpu_pj4b_do_suspend)
+SYM_TYPED_FUNC_START(cpu_pj4b_do_suspend)
 	stmfd	sp!, {r6 - r10}
 	mrc	p15, 1, r6, c15, c1, 0  @ save CP15 - extra features
 	mrc	p15, 1, r7, c15, c2, 0	@ save CP15 - Aux Func Modes Ctrl 0
@@ -241,9 +243,9 @@ ENTRY(cpu_pj4b_do_suspend)
 	stmia	r0!, {r6 - r10}
 	ldmfd	sp!, {r6 - r10}
 	b cpu_v7_do_suspend
-ENDPROC(cpu_pj4b_do_suspend)
+SYM_FUNC_END(cpu_pj4b_do_suspend)
 
-ENTRY(cpu_pj4b_do_resume)
+SYM_TYPED_FUNC_START(cpu_pj4b_do_resume)
 	ldmia	r0!, {r6 - r10}
 	mcr	p15, 1, r6, c15, c1, 0  @ restore CP15 - extra features
 	mcr	p15, 1, r7, c15, c2, 0	@ restore CP15 - Aux Func Modes Ctrl 0
@@ -251,7 +253,7 @@ ENTRY(cpu_pj4b_do_resume)
 	mcr	p15, 1, r9, c15, c1, 1  @ restore CP15 - Aux Debug Modes Ctrl 1
 	mcr	p15, 0, r10, c9, c14, 0  @ restore CP15 - PMC
 	b cpu_v7_do_resume
-ENDPROC(cpu_pj4b_do_resume)
+SYM_FUNC_END(cpu_pj4b_do_resume)
 #endif
 .globl	cpu_pj4b_suspend_size
 .equ	cpu_pj4b_suspend_size, cpu_v7_suspend_size + 4 * 5
diff --git a/arch/arm/mm/proc-v7m.S b/arch/arm/mm/proc-v7m.S
index d65a12f851a9..d4675603593b 100644
--- a/arch/arm/mm/proc-v7m.S
+++ b/arch/arm/mm/proc-v7m.S
@@ -8,18 +8,19 @@
  *  This is the "shell" of the ARMv7-M processor support.
  */
 #include <linux/linkage.h>
+#include <linux/cfi_types.h>
 #include <asm/assembler.h>
 #include <asm/page.h>
 #include <asm/v7m.h>
 #include "proc-macros.S"
 
-ENTRY(cpu_v7m_proc_init)
+SYM_TYPED_FUNC_START(cpu_v7m_proc_init)
 	ret	lr
-ENDPROC(cpu_v7m_proc_init)
+SYM_FUNC_END(cpu_v7m_proc_init)
 
-ENTRY(cpu_v7m_proc_fin)
+SYM_TYPED_FUNC_START(cpu_v7m_proc_fin)
 	ret	lr
-ENDPROC(cpu_v7m_proc_fin)
+SYM_FUNC_END(cpu_v7m_proc_fin)
 
 /*
  *	cpu_v7m_reset(loc)
@@ -31,9 +32,9 @@ ENDPROC(cpu_v7m_proc_fin)
  *	- loc   - location to jump to for soft reset
  */
 	.align	5
-ENTRY(cpu_v7m_reset)
+SYM_TYPED_FUNC_START(cpu_v7m_reset)
 	ret	r0
-ENDPROC(cpu_v7m_reset)
+SYM_FUNC_END(cpu_v7m_reset)
 
 /*
  *	cpu_v7m_do_idle()
@@ -42,36 +43,36 @@ ENDPROC(cpu_v7m_reset)
  *
  *	IRQs are already disabled.
  */
-ENTRY(cpu_v7m_do_idle)
+SYM_TYPED_FUNC_START(cpu_v7m_do_idle)
 	wfi
 	ret	lr
-ENDPROC(cpu_v7m_do_idle)
+SYM_FUNC_END(cpu_v7m_do_idle)
 
-ENTRY(cpu_v7m_dcache_clean_area)
+SYM_TYPED_FUNC_START(cpu_v7m_dcache_clean_area)
 	ret	lr
-ENDPROC(cpu_v7m_dcache_clean_area)
+SYM_FUNC_END(cpu_v7m_dcache_clean_area)
 
 /*
  * There is no MMU, so here is nothing to do.
  */
-ENTRY(cpu_v7m_switch_mm)
+SYM_TYPED_FUNC_START(cpu_v7m_switch_mm)
 	ret	lr
-ENDPROC(cpu_v7m_switch_mm)
+SYM_FUNC_END(cpu_v7m_switch_mm)
 
 .globl	cpu_v7m_suspend_size
 .equ	cpu_v7m_suspend_size, 0
 
 #ifdef CONFIG_ARM_CPU_SUSPEND
-ENTRY(cpu_v7m_do_suspend)
+SYM_TYPED_FUNC_START(cpu_v7m_do_suspend)
 	ret	lr
-ENDPROC(cpu_v7m_do_suspend)
+SYM_FUNC_END(cpu_v7m_do_suspend)
 
-ENTRY(cpu_v7m_do_resume)
+SYM_TYPED_FUNC_START(cpu_v7m_do_resume)
 	ret	lr
-ENDPROC(cpu_v7m_do_resume)
+SYM_FUNC_END(cpu_v7m_do_resume)
 #endif
 
-ENTRY(cpu_cm7_dcache_clean_area)
+SYM_TYPED_FUNC_START(cpu_cm7_dcache_clean_area)
 	dcache_line_size r2, r3
 	movw	r3, #:lower16:BASEADDR_V7M_SCB + V7M_SCB_DCCMVAC
 	movt	r3, #:upper16:BASEADDR_V7M_SCB + V7M_SCB_DCCMVAC
@@ -82,16 +83,16 @@ ENTRY(cpu_cm7_dcache_clean_area)
 	bhi	1b
 	dsb
 	ret	lr
-ENDPROC(cpu_cm7_dcache_clean_area)
+SYM_FUNC_END(cpu_cm7_dcache_clean_area)
 
-ENTRY(cpu_cm7_proc_fin)
+SYM_TYPED_FUNC_START(cpu_cm7_proc_fin)
 	movw	r2, #:lower16:(BASEADDR_V7M_SCB + V7M_SCB_CCR)
 	movt	r2, #:upper16:(BASEADDR_V7M_SCB + V7M_SCB_CCR)
 	ldr	r0, [r2]
 	bic	r0, r0, #(V7M_SCB_CCR_DC | V7M_SCB_CCR_IC)
 	str	r0, [r2]
 	ret	lr
-ENDPROC(cpu_cm7_proc_fin)
+SYM_FUNC_END(cpu_cm7_proc_fin)
 
 	.section ".init.text", "ax"
 
diff --git a/arch/arm/mm/proc-xsc3.S b/arch/arm/mm/proc-xsc3.S
index 0d496fda1afb..58197de674da 100644
--- a/arch/arm/mm/proc-xsc3.S
+++ b/arch/arm/mm/proc-xsc3.S
@@ -80,18 +80,20 @@
  *
  * Nothing too exciting at the moment
  */
-ENTRY(cpu_xsc3_proc_init)
+SYM_TYPED_FUNC_START(cpu_xsc3_proc_init)
 	ret	lr
+SYM_FUNC_END(cpu_xsc3_proc_init)
 
 /*
  * cpu_xsc3_proc_fin()
  */
-ENTRY(cpu_xsc3_proc_fin)
+SYM_TYPED_FUNC_START(cpu_xsc3_proc_fin)
 	mrc	p15, 0, r0, c1, c0, 0		@ ctrl register
 	bic	r0, r0, #0x1800			@ ...IZ...........
 	bic	r0, r0, #0x0006			@ .............CA.
 	mcr	p15, 0, r0, c1, c0, 0		@ disable caches
 	ret	lr
+SYM_FUNC_END(cpu_xsc3_proc_fin)
 
 /*
  * cpu_xsc3_reset(loc)
@@ -104,7 +106,7 @@ ENTRY(cpu_xsc3_proc_fin)
  */
 	.align	5
 	.pushsection	.idmap.text, "ax"
-ENTRY(cpu_xsc3_reset)
+SYM_TYPED_FUNC_START(cpu_xsc3_reset)
 	mov	r1, #PSR_F_BIT|PSR_I_BIT|SVC_MODE
 	msr	cpsr_c, r1			@ reset CPSR
 	mrc	p15, 0, r1, c1, c0, 0		@ ctrl register
@@ -118,7 +120,7 @@ ENTRY(cpu_xsc3_reset)
 	@ already containing those two last instructions to survive.
 	mcr	p15, 0, ip, c8, c7, 0		@ invalidate I and D TLBs
 	ret	r0
-ENDPROC(cpu_xsc3_reset)
+SYM_FUNC_END(cpu_xsc3_reset)
 	.popsection
 
 /*
@@ -133,10 +135,11 @@ ENDPROC(cpu_xsc3_reset)
  */
 	.align	5
 
-ENTRY(cpu_xsc3_do_idle)
+SYM_TYPED_FUNC_START(cpu_xsc3_do_idle)
 	mov	r0, #1
 	mcr	p14, 0, r0, c7, c0, 0		@ go to idle
 	ret	lr
+SYM_FUNC_END(cpu_xsc3_do_idle)
 
 /* ================================= CACHE ================================ */
 
@@ -343,12 +346,13 @@ SYM_TYPED_FUNC_START(xsc3_dma_unmap_area)
 	ret	lr
 SYM_FUNC_END(xsc3_dma_unmap_area)
 
-ENTRY(cpu_xsc3_dcache_clean_area)
+SYM_TYPED_FUNC_START(cpu_xsc3_dcache_clean_area)
 1:	mcr	p15, 0, r0, c7, c10, 1		@ clean L1 D line
 	add	r0, r0, #CACHELINESIZE
 	subs	r1, r1, #CACHELINESIZE
 	bhi	1b
 	ret	lr
+SYM_FUNC_END(cpu_xsc3_dcache_clean_area)
 
 /* =============================== PageTable ============================== */
 
@@ -360,7 +364,7 @@ ENTRY(cpu_xsc3_dcache_clean_area)
  * pgd: new page tables
  */
 	.align	5
-ENTRY(cpu_xsc3_switch_mm)
+SYM_TYPED_FUNC_START(cpu_xsc3_switch_mm)
 	clean_d_cache r1, r2
 	mcr	p15, 0, ip, c7, c5, 0		@ invalidate L1 I cache and BTB
 	mcr	p15, 0, ip, c7, c10, 4		@ data write barrier
@@ -369,6 +373,7 @@ ENTRY(cpu_xsc3_switch_mm)
 	mcr	p15, 0, r0, c2, c0, 0		@ load page table pointer
 	mcr	p15, 0, ip, c8, c7, 0		@ invalidate I and D TLBs
 	cpwait_ret lr, ip
+SYM_FUNC_END(cpu_xsc3_switch_mm)
 
 /*
  * cpu_xsc3_set_pte_ext(ptep, pte, ext)
@@ -394,7 +399,7 @@ cpu_xsc3_mt_table:
 	.long	0x00						@ unused
 
 	.align	5
-ENTRY(cpu_xsc3_set_pte_ext)
+SYM_TYPED_FUNC_START(cpu_xsc3_set_pte_ext)
 	xscale_set_pte_ext_prologue
 
 	tst	r1, #L_PTE_SHARED		@ shared?
@@ -407,6 +412,7 @@ ENTRY(cpu_xsc3_set_pte_ext)
 
 	xscale_set_pte_ext_epilogue
 	ret	lr
+SYM_FUNC_END(cpu_xsc3_set_pte_ext)
 
 	.ltorg
 	.align
@@ -414,7 +420,7 @@ ENTRY(cpu_xsc3_set_pte_ext)
 .globl	cpu_xsc3_suspend_size
 .equ	cpu_xsc3_suspend_size, 4 * 6
 #ifdef CONFIG_ARM_CPU_SUSPEND
-ENTRY(cpu_xsc3_do_suspend)
+SYM_TYPED_FUNC_START(cpu_xsc3_do_suspend)
 	stmfd	sp!, {r4 - r9, lr}
 	mrc	p14, 0, r4, c6, c0, 0	@ clock configuration, for turbo mode
 	mrc	p15, 0, r5, c15, c1, 0	@ CP access reg
@@ -425,9 +431,9 @@ ENTRY(cpu_xsc3_do_suspend)
 	bic	r4, r4, #2		@ clear frequency change bit
 	stmia	r0, {r4 - r9}		@ store cp regs
 	ldmia	sp!, {r4 - r9, pc}
-ENDPROC(cpu_xsc3_do_suspend)
+SYM_FUNC_END(cpu_xsc3_do_suspend)
 
-ENTRY(cpu_xsc3_do_resume)
+SYM_TYPED_FUNC_START(cpu_xsc3_do_resume)
 	ldmia	r0, {r4 - r9}		@ load cp regs
 	mov	ip, #0
 	mcr	p15, 0, ip, c7, c7, 0	@ invalidate I & D caches, BTB
@@ -443,7 +449,7 @@ ENTRY(cpu_xsc3_do_resume)
 	mcr	p15, 0, r8, c1, c0, 1	@ auxiliary control reg
 	mov	r0, r9			@ control register
 	b	cpu_resume_mmu
-ENDPROC(cpu_xsc3_do_resume)
+SYM_FUNC_END(cpu_xsc3_do_resume)
 #endif
 
 	.type	__xsc3_setup, #function
diff --git a/arch/arm/mm/proc-xscale.S b/arch/arm/mm/proc-xscale.S
index c7c94b83ba1f..ab93fecfd710 100644
--- a/arch/arm/mm/proc-xscale.S
+++ b/arch/arm/mm/proc-xscale.S
@@ -112,22 +112,24 @@ clean_addr:	.word	CLEAN_ADDR
  *
  * Nothing too exciting at the moment
  */
-ENTRY(cpu_xscale_proc_init)
+SYM_TYPED_FUNC_START(cpu_xscale_proc_init)
 	@ enable write buffer coalescing. Some bootloader disable it
 	mrc	p15, 0, r1, c1, c0, 1
 	bic	r1, r1, #1
 	mcr	p15, 0, r1, c1, c0, 1
 	ret	lr
+SYM_FUNC_END(cpu_xscale_proc_init)
 
 /*
  * cpu_xscale_proc_fin()
  */
-ENTRY(cpu_xscale_proc_fin)
+SYM_TYPED_FUNC_START(cpu_xscale_proc_fin)
 	mrc	p15, 0, r0, c1, c0, 0		@ ctrl register
 	bic	r0, r0, #0x1800			@ ...IZ...........
 	bic	r0, r0, #0x0006			@ .............CA.
 	mcr	p15, 0, r0, c1, c0, 0		@ disable caches
 	ret	lr
+SYM_FUNC_END(cpu_xscale_proc_fin)
 
 /*
  * cpu_xscale_reset(loc)
@@ -142,7 +144,7 @@ ENTRY(cpu_xscale_proc_fin)
  */
 	.align	5
 	.pushsection	.idmap.text, "ax"
-ENTRY(cpu_xscale_reset)
+SYM_TYPED_FUNC_START(cpu_xscale_reset)
 	mov	r1, #PSR_F_BIT|PSR_I_BIT|SVC_MODE
 	msr	cpsr_c, r1			@ reset CPSR
 	mcr	p15, 0, r1, c10, c4, 1		@ unlock I-TLB
@@ -160,7 +162,7 @@ ENTRY(cpu_xscale_reset)
 	@ already containing those two last instructions to survive.
 	mcr	p15, 0, ip, c8, c7, 0		@ invalidate I & D TLBs
 	ret	r0
-ENDPROC(cpu_xscale_reset)
+SYM_FUNC_END(cpu_xscale_reset)
 	.popsection
 
 /*
@@ -175,10 +177,11 @@ ENDPROC(cpu_xscale_reset)
  */
 	.align	5
 
-ENTRY(cpu_xscale_do_idle)
+SYM_TYPED_FUNC_START(cpu_xscale_do_idle)
 	mov	r0, #1
 	mcr	p14, 0, r0, c7, c0, 0		@ Go to IDLE
 	ret	lr
+SYM_FUNC_END(cpu_xscale_do_idle)
 
 /* ================================= CACHE ================================ */
 
@@ -430,12 +433,13 @@ SYM_TYPED_FUNC_START(xscale_dma_unmap_area)
 	ret	lr
 SYM_FUNC_END(xscale_dma_unmap_area)
 
-ENTRY(cpu_xscale_dcache_clean_area)
+SYM_TYPED_FUNC_START(cpu_xscale_dcache_clean_area)
 1:	mcr	p15, 0, r0, c7, c10, 1		@ clean D entry
 	add	r0, r0, #CACHELINESIZE
 	subs	r1, r1, #CACHELINESIZE
 	bhi	1b
 	ret	lr
+SYM_FUNC_END(cpu_xscale_dcache_clean_area)
 
 /* =============================== PageTable ============================== */
 
@@ -447,13 +451,14 @@ ENTRY(cpu_xscale_dcache_clean_area)
  * pgd: new page tables
  */
 	.align	5
-ENTRY(cpu_xscale_switch_mm)
+SYM_TYPED_FUNC_START(cpu_xscale_switch_mm)
 	clean_d_cache r1, r2
 	mcr	p15, 0, ip, c7, c5, 0		@ Invalidate I cache & BTB
 	mcr	p15, 0, ip, c7, c10, 4		@ Drain Write (& Fill) Buffer
 	mcr	p15, 0, r0, c2, c0, 0		@ load page table pointer
 	mcr	p15, 0, ip, c8, c7, 0		@ invalidate I & D TLBs
 	cpwait_ret lr, ip
+SYM_FUNC_END(cpu_xscale_switch_mm)
 
 /*
  * cpu_xscale_set_pte_ext(ptep, pte, ext)
@@ -481,7 +486,7 @@ cpu_xscale_mt_table:
 	.long	0x00						@ unused
 
 	.align	5
-ENTRY(cpu_xscale_set_pte_ext)
+SYM_TYPED_FUNC_START(cpu_xscale_set_pte_ext)
 	xscale_set_pte_ext_prologue
 
 	@
@@ -499,6 +504,7 @@ ENTRY(cpu_xscale_set_pte_ext)
 
 	xscale_set_pte_ext_epilogue
 	ret	lr
+SYM_FUNC_END(cpu_xscale_set_pte_ext)
 
 	.ltorg
 	.align
@@ -506,7 +512,7 @@ ENTRY(cpu_xscale_set_pte_ext)
 .globl	cpu_xscale_suspend_size
 .equ	cpu_xscale_suspend_size, 4 * 6
 #ifdef CONFIG_ARM_CPU_SUSPEND
-ENTRY(cpu_xscale_do_suspend)
+SYM_TYPED_FUNC_START(cpu_xscale_do_suspend)
 	stmfd	sp!, {r4 - r9, lr}
 	mrc	p14, 0, r4, c6, c0, 0	@ clock configuration, for turbo mode
 	mrc	p15, 0, r5, c15, c1, 0	@ CP access reg
@@ -517,9 +523,9 @@ ENTRY(cpu_xscale_do_suspend)
 	bic	r4, r4, #2		@ clear frequency change bit
 	stmia	r0, {r4 - r9}		@ store cp regs
 	ldmfd	sp!, {r4 - r9, pc}
-ENDPROC(cpu_xscale_do_suspend)
+SYM_FUNC_END(cpu_xscale_do_suspend)
 
-ENTRY(cpu_xscale_do_resume)
+SYM_TYPED_FUNC_START(cpu_xscale_do_resume)
 	ldmia	r0, {r4 - r9}		@ load cp regs
 	mov	ip, #0
 	mcr	p15, 0, ip, c8, c7, 0	@ invalidate I & D TLBs
@@ -532,7 +538,7 @@ ENTRY(cpu_xscale_do_resume)
 	mcr	p15, 0, r8, c1, c0, 1	@ auxiliary control reg
 	mov	r0, r9			@ control register
 	b	cpu_resume_mmu
-ENDPROC(cpu_xscale_do_resume)
+SYM_FUNC_END(cpu_xscale_do_resume)
 #endif
 
 	.type	__xscale_setup, #function
diff --git a/arch/arm/mm/proc.c b/arch/arm/mm/proc.c
new file mode 100644
index 000000000000..bdbbf65d1b36
--- /dev/null
+++ b/arch/arm/mm/proc.c
@@ -0,0 +1,500 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * This file defines C prototypes for the low-level processor assembly functions
+ * and creates a reference for CFI. This needs to be done for every assembly
+ * processor ("proc") function that is called from C but does not have a
+ * corresponding C implementation.
+ *
+ * Processors are listed in the order they appear in the Makefile.
+ *
+ * Functions are listed if and only if they see use on the target CPU, and in
+ * the order they are defined in struct processor.
+ */
+#include <asm/proc-fns.h>
+
+#ifdef CONFIG_CPU_ARM7TDMI
+void cpu_arm7tdmi_proc_init(void);
+__ADDRESSABLE(cpu_arm7tdmi_proc_init);
+void cpu_arm7tdmi_proc_fin(void);
+__ADDRESSABLE(cpu_arm7tdmi_proc_fin);
+void cpu_arm7tdmi_reset(void);
+__ADDRESSABLE(cpu_arm7tdmi_reset);
+int cpu_arm7tdmi_do_idle(void);
+__ADDRESSABLE(cpu_arm7tdmi_do_idle);
+void cpu_arm7tdmi_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_arm7tdmi_dcache_clean_area);
+void cpu_arm7tdmi_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_arm7tdmi_switch_mm);
+#endif
+
+#ifdef CONFIG_CPU_ARM720T
+void cpu_arm720_proc_init(void);
+__ADDRESSABLE(cpu_arm720_proc_init);
+void cpu_arm720_proc_fin(void);
+__ADDRESSABLE(cpu_arm720_proc_fin);
+void cpu_arm720_reset(void);
+__ADDRESSABLE(cpu_arm720_reset);
+int cpu_arm720_do_idle(void);
+__ADDRESSABLE(cpu_arm720_do_idle);
+void cpu_arm720_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_arm720_dcache_clean_area);
+void cpu_arm720_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_arm720_switch_mm);
+void cpu_arm720_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
+__ADDRESSABLE(cpu_arm720_set_pte_ext);
+#endif
+
+#ifdef CONFIG_CPU_ARM740T
+void cpu_arm740_proc_init(void);
+__ADDRESSABLE(cpu_arm740_proc_init);
+void cpu_arm740_proc_fin(void);
+__ADDRESSABLE(cpu_arm740_proc_fin);
+void cpu_arm740_reset(void);
+__ADDRESSABLE(cpu_arm740_reset);
+int cpu_arm740_do_idle(void);
+__ADDRESSABLE(cpu_arm740_do_idle);
+void cpu_arm740_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_arm740_dcache_clean_area);
+void cpu_arm740_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_arm740_switch_mm);
+#endif
+
+#ifdef CONFIG_CPU_ARM9TDMI
+void cpu_arm9tdmi_proc_init(void);
+__ADDRESSABLE(cpu_arm9tdmi_proc_init);
+void cpu_arm9tdmi_proc_fin(void);
+__ADDRESSABLE(cpu_arm9tdmi_proc_fin);
+void cpu_arm9tdmi_reset(void);
+__ADDRESSABLE(cpu_arm9tdmi_reset);
+int cpu_arm9tdmi_do_idle(void);
+__ADDRESSABLE(cpu_arm9tdmi_do_idle);
+void cpu_arm9tdmi_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_arm9tdmi_dcache_clean_area);
+void cpu_arm9tdmi_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_arm9tdmi_switch_mm);
+#endif
+
+#ifdef CONFIG_CPU_ARM920T
+void cpu_arm920_proc_init(void);
+__ADDRESSABLE(cpu_arm920_proc_init);
+void cpu_arm920_proc_fin(void);
+__ADDRESSABLE(cpu_arm920_proc_fin);
+void cpu_arm920_reset(void);
+__ADDRESSABLE(cpu_arm920_reset);
+int cpu_arm920_do_idle(void);
+__ADDRESSABLE(cpu_arm920_do_idle);
+void cpu_arm920_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_arm920_dcache_clean_area);
+void cpu_arm920_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_arm920_switch_mm);
+void cpu_arm920_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
+__ADDRESSABLE(cpu_arm920_set_pte_ext);
+#ifdef CONFIG_ARM_CPU_SUSPEND
+void cpu_arm920_do_suspend(void *);
+__ADDRESSABLE(cpu_arm920_do_suspend);
+void cpu_arm920_do_resume(void *);
+__ADDRESSABLE(cpu_arm920_do_resume);
+#endif /* CONFIG_ARM_CPU_SUSPEND */
+#endif /* CONFIG_CPU_ARM920T */
+
+#ifdef CONFIG_CPU_ARM922T
+void cpu_arm922_proc_init(void);
+__ADDRESSABLE(cpu_arm922_proc_init);
+void cpu_arm922_proc_fin(void);
+__ADDRESSABLE(cpu_arm922_proc_fin);
+void cpu_arm922_reset(void);
+__ADDRESSABLE(cpu_arm922_reset);
+int cpu_arm922_do_idle(void);
+__ADDRESSABLE(cpu_arm922_do_idle);
+void cpu_arm922_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_arm922_dcache_clean_area);
+void cpu_arm922_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_arm922_switch_mm);
+void cpu_arm922_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
+__ADDRESSABLE(cpu_arm922_set_pte_ext);
+#endif
+
+#ifdef CONFIG_CPU_ARM925T
+void cpu_arm925_proc_init(void);
+__ADDRESSABLE(cpu_arm925_proc_init);
+void cpu_arm925_proc_fin(void);
+__ADDRESSABLE(cpu_arm925_proc_fin);
+void cpu_arm925_reset(void);
+__ADDRESSABLE(cpu_arm925_reset);
+int cpu_arm925_do_idle(void);
+__ADDRESSABLE(cpu_arm925_do_idle);
+void cpu_arm925_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_arm925_dcache_clean_area);
+void cpu_arm925_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_arm925_switch_mm);
+void cpu_arm925_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
+__ADDRESSABLE(cpu_arm925_set_pte_ext);
+#endif
+
+#ifdef CONFIG_CPU_ARM926T
+void cpu_arm926_proc_init(void);
+__ADDRESSABLE(cpu_arm926_proc_init);
+void cpu_arm926_proc_fin(void);
+__ADDRESSABLE(cpu_arm926_proc_fin);
+void cpu_arm926_reset(unsigned long addr, bool hvc);
+__ADDRESSABLE(cpu_arm926_reset);
+int cpu_arm926_do_idle(void);
+__ADDRESSABLE(cpu_arm926_do_idle);
+void cpu_arm926_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_arm926_dcache_clean_area);
+void cpu_arm926_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_arm926_switch_mm);
+void cpu_arm926_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
+__ADDRESSABLE(cpu_arm926_set_pte_ext);
+#ifdef CONFIG_ARM_CPU_SUSPEND
+void cpu_arm926_do_suspend(void *);
+__ADDRESSABLE(cpu_arm926_do_suspend);
+void cpu_arm926_do_resume(void *);
+__ADDRESSABLE(cpu_arm926_do_resume);
+#endif /* CONFIG_ARM_CPU_SUSPEND */
+#endif /* CONFIG_CPU_ARM926T */
+
+#ifdef CONFIG_CPU_ARM940T
+void cpu_arm940_proc_init(void);
+__ADDRESSABLE(cpu_arm940_proc_init);
+void cpu_arm940_proc_fin(void);
+__ADDRESSABLE(cpu_arm940_proc_fin);
+void cpu_arm940_reset(void);
+__ADDRESSABLE(cpu_arm940_reset);
+int cpu_arm940_do_idle(void);
+__ADDRESSABLE(cpu_arm940_do_idle);
+void cpu_arm940_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_arm940_dcache_clean_area);
+void cpu_arm940_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_arm940_switch_mm);
+#endif
+
+#ifdef CONFIG_CPU_ARM946E
+void cpu_arm946_proc_init(void);
+__ADDRESSABLE(cpu_arm946_proc_init);
+void cpu_arm946_proc_fin(void);
+__ADDRESSABLE(cpu_arm946_proc_fin);
+void cpu_arm946_reset(void);
+__ADDRESSABLE(cpu_arm946_reset);
+int cpu_arm946_do_idle(void);
+__ADDRESSABLE(cpu_arm946_do_idle);
+void cpu_arm946_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_arm946_dcache_clean_area);
+void cpu_arm946_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_arm946_switch_mm);
+#endif
+
+#ifdef CONFIG_CPU_FA526
+void cpu_fa526_proc_init(void);
+__ADDRESSABLE(cpu_fa526_proc_init);
+void cpu_fa526_proc_fin(void);
+__ADDRESSABLE(cpu_fa526_proc_fin);
+void cpu_fa526_reset(unsigned long addr, bool hvc);
+__ADDRESSABLE(cpu_fa526_reset);
+int cpu_fa526_do_idle(void);
+__ADDRESSABLE(cpu_fa526_do_idle);
+void cpu_fa526_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_fa526_dcache_clean_area);
+void cpu_fa526_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_fa526_switch_mm);
+void cpu_fa526_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
+__ADDRESSABLE(cpu_fa526_set_pte_ext);
+#endif
+
+#ifdef CONFIG_CPU_ARM1020
+void cpu_arm1020_proc_init(void);
+__ADDRESSABLE(cpu_arm1020_proc_init);
+void cpu_arm1020_proc_fin(void);
+__ADDRESSABLE(cpu_arm1020_proc_fin);
+void cpu_arm1020_reset(unsigned long addr, bool hvc);
+__ADDRESSABLE(cpu_arm1020_reset);
+int cpu_arm1020_do_idle(void);
+__ADDRESSABLE(cpu_arm1020_do_idle);
+void cpu_arm1020_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_arm1020_dcache_clean_area);
+void cpu_arm1020_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_arm1020_switch_mm);
+void cpu_arm1020_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
+__ADDRESSABLE(cpu_arm1020_set_pte_ext);
+#endif
+
+#ifdef CONFIG_CPU_ARM1020E
+void cpu_arm1020e_proc_init(void);
+__ADDRESSABLE(cpu_arm1020e_proc_init);
+void cpu_arm1020e_proc_fin(void);
+__ADDRESSABLE(cpu_arm1020e_proc_fin);
+void cpu_arm1020e_reset(unsigned long addr, bool hvc);
+__ADDRESSABLE(cpu_arm1020e_reset);
+int cpu_arm1020e_do_idle(void);
+__ADDRESSABLE(cpu_arm1020e_do_idle);
+void cpu_arm1020e_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_arm1020e_dcache_clean_area);
+void cpu_arm1020e_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_arm1020e_switch_mm);
+void cpu_arm1020e_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
+__ADDRESSABLE(cpu_arm1020e_set_pte_ext);
+#endif
+
+#ifdef CONFIG_CPU_ARM1022
+void cpu_arm1022_proc_init(void);
+__ADDRESSABLE(cpu_arm1022_proc_init);
+void cpu_arm1022_proc_fin(void);
+__ADDRESSABLE(cpu_arm1022_proc_fin);
+void cpu_arm1022_reset(unsigned long addr, bool hvc);
+__ADDRESSABLE(cpu_arm1022_reset);
+int cpu_arm1022_do_idle(void);
+__ADDRESSABLE(cpu_arm1022_do_idle);
+void cpu_arm1022_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_arm1022_dcache_clean_area);
+void cpu_arm1022_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_arm1022_switch_mm);
+void cpu_arm1022_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
+__ADDRESSABLE(cpu_arm1022_set_pte_ext);
+#endif
+
+#ifdef CONFIG_CPU_ARM1026
+void cpu_arm1026_proc_init(void);
+__ADDRESSABLE(cpu_arm1026_proc_init);
+void cpu_arm1026_proc_fin(void);
+__ADDRESSABLE(cpu_arm1026_proc_fin);
+void cpu_arm1026_reset(unsigned long addr, bool hvc);
+__ADDRESSABLE(cpu_arm1026_reset);
+int cpu_arm1026_do_idle(void);
+__ADDRESSABLE(cpu_arm1026_do_idle);
+void cpu_arm1026_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_arm1026_dcache_clean_area);
+void cpu_arm1026_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_arm1026_switch_mm);
+void cpu_arm1026_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
+__ADDRESSABLE(cpu_arm1026_set_pte_ext);
+#endif
+
+#ifdef CONFIG_CPU_SA110
+void cpu_sa110_proc_init(void);
+__ADDRESSABLE(cpu_sa110_proc_init);
+void cpu_sa110_proc_fin(void);
+__ADDRESSABLE(cpu_sa110_proc_fin);
+void cpu_sa110_reset(unsigned long addr, bool hvc);
+__ADDRESSABLE(cpu_sa110_reset);
+int cpu_sa110_do_idle(void);
+__ADDRESSABLE(cpu_sa110_do_idle);
+void cpu_sa110_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_sa110_dcache_clean_area);
+void cpu_sa110_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_sa110_switch_mm);
+void cpu_sa110_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
+__ADDRESSABLE(cpu_sa110_set_pte_ext);
+#endif
+
+#ifdef CONFIG_CPU_SA1100
+void cpu_sa1100_proc_init(void);
+__ADDRESSABLE(cpu_sa1100_proc_init);
+void cpu_sa1100_proc_fin(void);
+__ADDRESSABLE(cpu_sa1100_proc_fin);
+void cpu_sa1100_reset(unsigned long addr, bool hvc);
+__ADDRESSABLE(cpu_sa1100_reset);
+int cpu_sa1100_do_idle(void);
+__ADDRESSABLE(cpu_sa1100_do_idle);
+void cpu_sa1100_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_sa1100_dcache_clean_area);
+void cpu_sa1100_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_sa1100_switch_mm);
+void cpu_sa1100_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
+__ADDRESSABLE(cpu_sa1100_set_pte_ext);
+#ifdef CONFIG_ARM_CPU_SUSPEND
+void cpu_sa1100_do_suspend(void *);
+__ADDRESSABLE(cpu_sa1100_do_suspend);
+void cpu_sa1100_do_resume(void *);
+__ADDRESSABLE(cpu_sa1100_do_resume);
+#endif /* CONFIG_ARM_CPU_SUSPEND */
+#endif /* CONFIG_CPU_SA1100 */
+
+#ifdef CONFIG_CPU_XSCALE
+void cpu_xscale_proc_init(void);
+__ADDRESSABLE(cpu_xscale_proc_init);
+void cpu_xscale_proc_fin(void);
+__ADDRESSABLE(cpu_xscale_proc_fin);
+void cpu_xscale_reset(unsigned long addr, bool hvc);
+__ADDRESSABLE(cpu_xscale_reset);
+int cpu_xscale_do_idle(void);
+__ADDRESSABLE(cpu_xscale_do_idle);
+void cpu_xscale_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_xscale_dcache_clean_area);
+void cpu_xscale_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_xscale_switch_mm);
+void cpu_xscale_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
+__ADDRESSABLE(cpu_xscale_set_pte_ext);
+#ifdef CONFIG_ARM_CPU_SUSPEND
+void cpu_xscale_do_suspend(void *);
+__ADDRESSABLE(cpu_xscale_do_suspend);
+void cpu_xscale_do_resume(void *);
+__ADDRESSABLE(cpu_xscale_do_resume);
+#endif /* CONFIG_ARM_CPU_SUSPEND */
+#endif /* CONFIG_CPU_XSCALE */
+
+#ifdef CONFIG_CPU_XSC3
+void cpu_xsc3_proc_init(void);
+__ADDRESSABLE(cpu_xsc3_proc_init);
+void cpu_xsc3_proc_fin(void);
+__ADDRESSABLE(cpu_xsc3_proc_fin);
+void cpu_xsc3_reset(unsigned long addr, bool hvc);
+__ADDRESSABLE(cpu_xsc3_reset);
+int cpu_xsc3_do_idle(void);
+__ADDRESSABLE(cpu_xsc3_do_idle);
+void cpu_xsc3_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_xsc3_dcache_clean_area);
+void cpu_xsc3_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_xsc3_switch_mm);
+void cpu_xsc3_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
+__ADDRESSABLE(cpu_xsc3_set_pte_ext);
+#ifdef CONFIG_ARM_CPU_SUSPEND
+void cpu_xsc3_do_suspend(void *);
+__ADDRESSABLE(cpu_xsc3_do_suspend);
+void cpu_xsc3_do_resume(void *);
+__ADDRESSABLE(cpu_xsc3_do_resume);
+#endif /* CONFIG_ARM_CPU_SUSPEND */
+#endif /* CONFIG_CPU_XSC3 */
+
+#ifdef CONFIG_CPU_MOHAWK
+void cpu_mohawk_proc_init(void);
+__ADDRESSABLE(cpu_mohawk_proc_init);
+void cpu_mohawk_proc_fin(void);
+__ADDRESSABLE(cpu_mohawk_proc_fin);
+void cpu_mohawk_reset(unsigned long addr, bool hvc);
+__ADDRESSABLE(cpu_mohawk_reset);
+int cpu_mohawk_do_idle(void);
+__ADDRESSABLE(cpu_mohawk_do_idle);
+void cpu_mohawk_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_mohawk_dcache_clean_area);
+void cpu_mohawk_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_mohawk_switch_mm);
+void cpu_mohawk_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
+__ADDRESSABLE(cpu_mohawk_set_pte_ext);
+#ifdef CONFIG_ARM_CPU_SUSPEND
+void cpu_mohawk_do_suspend(void *);
+__ADDRESSABLE(cpu_mohawk_do_suspend);
+void cpu_mohawk_do_resume(void *);
+__ADDRESSABLE(cpu_mohawk_do_resume);
+#endif /* CONFIG_ARM_CPU_SUSPEND */
+#endif /* CONFIG_CPU_MOHAWK */
+
+#ifdef CONFIG_CPU_FEROCEON
+void cpu_feroceon_proc_init(void);
+__ADDRESSABLE(cpu_feroceon_proc_init);
+void cpu_feroceon_proc_fin(void);
+__ADDRESSABLE(cpu_feroceon_proc_fin);
+void cpu_feroceon_reset(unsigned long addr, bool hvc);
+__ADDRESSABLE(cpu_feroceon_reset);
+int cpu_feroceon_do_idle(void);
+__ADDRESSABLE(cpu_feroceon_do_idle);
+void cpu_feroceon_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_feroceon_dcache_clean_area);
+void cpu_feroceon_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_feroceon_switch_mm);
+void cpu_feroceon_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
+__ADDRESSABLE(cpu_feroceon_set_pte_ext);
+#ifdef CONFIG_ARM_CPU_SUSPEND
+void cpu_feroceon_do_suspend(void *);
+__ADDRESSABLE(cpu_feroceon_do_suspend);
+void cpu_feroceon_do_resume(void *);
+__ADDRESSABLE(cpu_feroceon_do_resume);
+#endif /* CONFIG_ARM_CPU_SUSPEND */
+#endif /* CONFIG_CPU_FEROCEON */
+
+#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K)
+void cpu_v6_proc_init(void);
+__ADDRESSABLE(cpu_v6_proc_init);
+void cpu_v6_proc_fin(void);
+__ADDRESSABLE(cpu_v6_proc_fin);
+void cpu_v6_reset(unsigned long addr, bool hvc);
+__ADDRESSABLE(cpu_v6_reset);
+int cpu_v6_do_idle(void);
+__ADDRESSABLE(cpu_v6_do_idle);
+void cpu_v6_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_v6_dcache_clean_area);
+void cpu_v6_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_v6_switch_mm);
+void cpu_v6_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
+__ADDRESSABLE(cpu_v6_set_pte_ext);
+#ifdef CONFIG_ARM_CPU_SUSPEND
+void cpu_v6_do_suspend(void *);
+__ADDRESSABLE(cpu_v6_do_suspend);
+void cpu_v6_do_resume(void *);
+__ADDRESSABLE(cpu_v6_do_resume);
+#endif /* CONFIG_ARM_CPU_SUSPEND */
+#endif /* CPU_V6 */
+
+#ifdef CONFIG_CPU_V7
+void cpu_v7_proc_init(void);
+__ADDRESSABLE(cpu_v7_proc_init);
+void cpu_v7_proc_fin(void);
+__ADDRESSABLE(cpu_v7_proc_fin);
+void cpu_v7_reset(void);
+__ADDRESSABLE(cpu_v7_reset);
+int cpu_v7_do_idle(void);
+__ADDRESSABLE(cpu_v7_do_idle);
+#ifdef CONFIG_PJ4B_ERRATA_4742
+int cpu_pj4b_do_idle(void);
+__ADDRESSABLE(cpu_pj4b_do_idle);
+#endif
+void cpu_v7_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_v7_dcache_clean_area);
+void cpu_v7_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+/* Special switch_mm() callbacks to work around bugs in v7 */
+__ADDRESSABLE(cpu_v7_switch_mm);
+void cpu_v7_iciallu_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_v7_iciallu_switch_mm);
+void cpu_v7_bpiall_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_v7_bpiall_switch_mm);
+#ifdef CONFIG_ARM_LPAE
+void cpu_v7_set_pte_ext(pte_t *ptep, pte_t pte);
+#else
+void cpu_v7_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
+#endif
+__ADDRESSABLE(cpu_v7_set_pte_ext);
+#ifdef CONFIG_ARM_CPU_SUSPEND
+void cpu_v7_do_suspend(void *);
+__ADDRESSABLE(cpu_v7_do_suspend);
+void cpu_v7_do_resume(void *);
+__ADDRESSABLE(cpu_v7_do_resume);
+/* Special versions of suspend and resume for the CA9MP cores */
+void cpu_ca9mp_do_suspend(void *);
+__ADDRESSABLE(cpu_ca9mp_do_suspend);
+void cpu_ca9mp_do_resume(void *);
+__ADDRESSABLE(cpu_ca9mp_do_resume);
+/* Special versions of suspend and resume for the Marvell PJ4B cores */
+#ifdef CONFIG_CPU_PJ4B
+void cpu_pj4b_do_suspend(void *);
+__ADDRESSABLE(cpu_pj4b_do_suspend);
+void cpu_pj4b_do_resume(void *);
+__ADDRESSABLE(cpu_pj4b_do_resume);
+#endif /* CONFIG_CPU_PJ4B */
+#endif /* CONFIG_ARM_CPU_SUSPEND */
+#endif /* CONFIG_CPU_V7 */
+
+#ifdef CONFIG_CPU_V7M
+void cpu_v7m_proc_init(void);
+__ADDRESSABLE(cpu_v7m_proc_init);
+void cpu_v7m_proc_fin(void);
+__ADDRESSABLE(cpu_v7m_proc_fin);
+void cpu_v7m_reset(unsigned long addr, bool hvc);
+__ADDRESSABLE(cpu_v7m_reset);
+int cpu_v7m_do_idle(void);
+__ADDRESSABLE(cpu_v7m_do_idle);
+void cpu_v7m_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_v7m_dcache_clean_area);
+void cpu_v7m_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
+__ADDRESSABLE(cpu_v7m_switch_mm);
+void cpu_v7m_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
+__ADDRESSABLE(cpu_v7m_set_pte_ext);
+#ifdef CONFIG_ARM_CPU_SUSPEND
+void cpu_v7m_do_suspend(void *);
+__ADDRESSABLE(cpu_v7m_do_suspend);
+void cpu_v7m_do_resume(void *);
+__ADDRESSABLE(cpu_v7m_do_resume);
+#endif /* CONFIG_ARM_CPU_SUSPEND */
+void cpu_cm7_proc_fin(void);
+__ADDRESSABLE(cpu_cm7_proc_fin);
+void cpu_cm7_dcache_clean_area(void *addr, int size);
+__ADDRESSABLE(cpu_cm7_dcache_clean_area);
+#endif /* CONFIG_CPU_V7M */

-- 
2.44.0


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[PATCH v4 6/8] ARM: lib: Annotate loop delay instructions for CFI

[Linus Walleij]

When we annotate the loop delay code with SYM_TYPED_FUNC_START()
a function prototype signature will be emitted into the object
file above each site called from C, and the delay loop code is
using "fallthroughs" from the different assembly callbacks. This
will not work as the execution flow will run into the prototype
signatures.

Rewrite the code to use explicit branches to the other code
segments and annotate the code using SYM_TYPED_FUNC_START().

Tested on the ARM Versatile which uses the calibrated loop delay.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 arch/arm/lib/delay-loop.S | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/arch/arm/lib/delay-loop.S b/arch/arm/lib/delay-loop.S
index 3ac05177d097..33b08ca1c242 100644
--- a/arch/arm/lib/delay-loop.S
+++ b/arch/arm/lib/delay-loop.S
@@ -5,6 +5,7 @@
  *  Copyright (C) 1995, 1996 Russell King
  */
 #include <linux/linkage.h>
+#include <linux/cfi_types.h>
 #include <asm/assembler.h>
 #include <asm/delay.h>
 
@@ -24,21 +25,26 @@
  * HZ  <= 1000
  */
 
-ENTRY(__loop_udelay)
+SYM_TYPED_FUNC_START(__loop_udelay)
 		ldr	r2, .LC1
 		mul	r0, r2, r0		@ r0 = delay_us * UDELAY_MULT
-ENTRY(__loop_const_udelay)			@ 0 <= r0 <= 0xfffffaf0
+		b	__loop_const_udelay
+SYM_FUNC_END(__loop_udelay)
+
+SYM_TYPED_FUNC_START(__loop_const_udelay)	@ 0 <= r0 <= 0xfffffaf0
 		ldr	r2, .LC0
 		ldr	r2, [r2]
 		umull	r1, r0, r2, r0		@ r0-r1 = r0 * loops_per_jiffy
 		adds	r1, r1, #0xffffffff	@ rounding up ...
 		adcs	r0, r0, r0		@ and right shift by 31
 		reteq	lr
+		b	__loop_delay
+SYM_FUNC_END(__loop_const_udelay)
 
 		.align 3
 
 @ Delay routine
-ENTRY(__loop_delay)
+SYM_TYPED_FUNC_START(__loop_delay)
 		subs	r0, r0, #1
 #if 0
 		retls	lr
@@ -58,6 +64,4 @@ ENTRY(__loop_delay)
 #endif
 		bhi	__loop_delay
 		ret	lr
-ENDPROC(__loop_udelay)
-ENDPROC(__loop_const_udelay)
-ENDPROC(__loop_delay)
+SYM_FUNC_END(__loop_delay)

-- 
2.44.0


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[PATCH v4 7/8] ARM: hw_breakpoint: Handle CFI breakpoints

[Linus Walleij]

This registers a breakpoint handler for the new breakpoint type
(0x03) inserted by LLVM CLANG for CFI breakpoints.

If we are in permissive mode, just print a backtrace and continue.

Example with CONFIG_CFI_PERMISSIVE enabled:

> echo CFI_FORWARD_PROTO > /sys/kernel/debug/provoke-crash/DIRECT
lkdtm: Performing direct entry CFI_FORWARD_PROTO
lkdtm: Calling matched prototype ...
lkdtm: Calling mismatched prototype ...
CFI failure at lkdtm_indirect_call+0x40/0x4c (target: 0x0; expected type: 0x00000000)
WARNING: CPU: 1 PID: 112 at lkdtm_indirect_call+0x40/0x4c
CPU: 1 PID: 112 Comm: sh Not tainted 6.8.0-rc1+ #150
Hardware name: ARM-Versatile Express
(...)
lkdtm: FAIL: survived mismatched prototype function call!
lkdtm: Unexpected! This kernel (6.8.0-rc1+ armv7l) was built with CONFIG_CFI_CLANG=y

As you can see the LKDTM test fails, but I expect that this would be
expected behaviour in the permissive mode.

We are currently not implementing target and type for the CFI
breakpoint as this requires additional operand bundling compiler
extensions.

CPUs without breakpoint support cannot handle breakpoints naturally,
in these cases the permissive mode will not work, CFI will fall over
on an undefined instruction:

Internal error: Oops - undefined instruction: 0 [#1] PREEMPT ARM
CPU: 0 PID: 186 Comm: ash Tainted: G        W          6.9.0-rc1+ #7
Hardware name: Gemini (Device Tree)
PC is at lkdtm_indirect_call+0x38/0x4c
LR is at lkdtm_CFI_FORWARD_PROTO+0x30/0x6c

This is reasonable I think: it's the best CFI can do to ascertain
the the control flow is not broken on these CPUs.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 arch/arm/include/asm/hw_breakpoint.h |  1 +
 arch/arm/kernel/hw_breakpoint.c      | 30 ++++++++++++++++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/arch/arm/include/asm/hw_breakpoint.h b/arch/arm/include/asm/hw_breakpoint.h
index 62358d3ca0a8..e7f9961c53b2 100644
--- a/arch/arm/include/asm/hw_breakpoint.h
+++ b/arch/arm/include/asm/hw_breakpoint.h
@@ -84,6 +84,7 @@ static inline void decode_ctrl_reg(u32 reg,
 #define ARM_DSCR_MOE(x)			((x >> 2) & 0xf)
 #define ARM_ENTRY_BREAKPOINT		0x1
 #define ARM_ENTRY_ASYNC_WATCHPOINT	0x2
+#define ARM_ENTRY_CFI_BREAKPOINT	0x3
 #define ARM_ENTRY_SYNC_WATCHPOINT	0xa
 
 /* DSCR monitor/halting bits. */
diff --git a/arch/arm/kernel/hw_breakpoint.c b/arch/arm/kernel/hw_breakpoint.c
index dc0fb7a81371..ce7c152dd6e9 100644
--- a/arch/arm/kernel/hw_breakpoint.c
+++ b/arch/arm/kernel/hw_breakpoint.c
@@ -17,6 +17,7 @@
 #include <linux/perf_event.h>
 #include <linux/hw_breakpoint.h>
 #include <linux/smp.h>
+#include <linux/cfi.h>
 #include <linux/cpu_pm.h>
 #include <linux/coresight.h>
 
@@ -903,6 +904,32 @@ static void breakpoint_handler(unsigned long unknown, struct pt_regs *regs)
 	watchpoint_single_step_handler(addr);
 }
 
+#ifdef CONFIG_CFI_CLANG
+static void hw_breakpoint_cfi_handler(struct pt_regs *regs)
+{
+	/* TODO: implementing target and type requires compiler work */
+	unsigned long target = 0;
+	u32 type = 0;
+
+	switch (report_cfi_failure(regs, instruction_pointer(regs), &target, type)) {
+	case BUG_TRAP_TYPE_BUG:
+		die("Oops - CFI", regs, 0);
+		break;
+	case BUG_TRAP_TYPE_WARN:
+		/* Skip the breaking instruction */
+		instruction_pointer(regs) += 4;
+		break;
+	default:
+		die("Unknown CFI error", regs, 0);
+		break;
+	}
+}
+#else
+static void hw_breakpoint_cfi_handler(struct pt_regs *regs)
+{
+}
+#endif
+
 /*
  * Called from either the Data Abort Handler [watchpoint] or the
  * Prefetch Abort Handler [breakpoint] with interrupts disabled.
@@ -932,6 +959,9 @@ static int hw_breakpoint_pending(unsigned long addr, unsigned int fsr,
 	case ARM_ENTRY_SYNC_WATCHPOINT:
 		watchpoint_handler(addr, fsr, regs);
 		break;
+	case ARM_ENTRY_CFI_BREAKPOINT:
+		hw_breakpoint_cfi_handler(regs);
+		break;
 	default:
 		ret = 1; /* Unhandled fault. */
 	}

-- 
2.44.0


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Re: [PATCH v4 7/8] ARM: hw_breakpoint: Handle CFI breakpoints

[Kees Cook]

On Thu, Mar 28, 2024 at 09:19:30AM +0100, Linus Walleij wrote:
> This registers a breakpoint handler for the new breakpoint type
> (0x03) inserted by LLVM CLANG for CFI breakpoints.
> 
> If we are in permissive mode, just print a backtrace and continue.
> 
> Example with CONFIG_CFI_PERMISSIVE enabled:
> 
> > echo CFI_FORWARD_PROTO > /sys/kernel/debug/provoke-crash/DIRECT
> lkdtm: Performing direct entry CFI_FORWARD_PROTO
> lkdtm: Calling matched prototype ...
> lkdtm: Calling mismatched prototype ...
> CFI failure at lkdtm_indirect_call+0x40/0x4c (target: 0x0; expected type: 0x00000000)
> WARNING: CPU: 1 PID: 112 at lkdtm_indirect_call+0x40/0x4c
> CPU: 1 PID: 112 Comm: sh Not tainted 6.8.0-rc1+ #150
> Hardware name: ARM-Versatile Express
> (...)
> lkdtm: FAIL: survived mismatched prototype function call!
> lkdtm: Unexpected! This kernel (6.8.0-rc1+ armv7l) was built with CONFIG_CFI_CLANG=y
> 
> As you can see the LKDTM test fails, but I expect that this would be
> expected behaviour in the permissive mode.
> 
> We are currently not implementing target and type for the CFI
> breakpoint as this requires additional operand bundling compiler
> extensions.
> 
> CPUs without breakpoint support cannot handle breakpoints naturally,
> in these cases the permissive mode will not work, CFI will fall over
> on an undefined instruction:
> 
> Internal error: Oops - undefined instruction: 0 [#1] PREEMPT ARM
> CPU: 0 PID: 186 Comm: ash Tainted: G        W          6.9.0-rc1+ #7
> Hardware name: Gemini (Device Tree)
> PC is at lkdtm_indirect_call+0x38/0x4c
> LR is at lkdtm_CFI_FORWARD_PROTO+0x30/0x6c
> 
> This is reasonable I think: it's the best CFI can do to ascertain
> the the control flow is not broken on these CPUs.
> 
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Thanks for making this "fail closed". Looks good!

Reviewed-by: Kees Cook <keescook@chromium.org>

-- 
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[PATCH v4 8/8] ARM: Support CLANG CFI

[Linus Walleij]

Support Control Flow Integrity (CFI) when compiling with
CLANG.

In the as-of-writing LLVM CLANG implementation (v17)
the 32-bit ARM platform is supported by the generic CFI
implementation, which isn't tailored specifically for ARM32
but works well enough to enable the feature.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 arch/arm/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index b14aed3a17ab..df7bd07ad0d4 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -35,6 +35,7 @@ config ARM
 	select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX
 	select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT if CPU_V7
 	select ARCH_SUPPORTS_ATOMIC_RMW
+	select ARCH_SUPPORTS_CFI_CLANG
 	select ARCH_SUPPORTS_HUGETLBFS if ARM_LPAE
 	select ARCH_SUPPORTS_PER_VMA_LOCK
 	select ARCH_USE_BUILTIN_BSWAP

-- 
2.44.0


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Re: [PATCH v4 0/8] CFI for ARM32 using LLVM

[Kees Cook]

On Thu, Mar 28, 2024 at 09:19:23AM +0100, Linus Walleij wrote:
> This is a first patch set to support CLANG CFI (Control Flow
> Integrity) on ARM32.
> 
> For information about what CFI is, see:
> https://clang.llvm.org/docs/ControlFlowIntegrity.html
> 
> For the kernel KCFI flavor, see:
> https://lwn.net/Articles/898040/
> 
> The base changes required to bring up KCFI on ARM32 was mostly
> related to the use of custom vtables in the kernel, combined
> with defines to call into these vtable members directly from
> sites where they are used.
> 
> We annotate all assembly calls that are called directly from
> C with SYM_TYPED_FUNC_START()/SYM_FUNC_END() so it is easy
> to see while reading the assembly that these functions are
> called from C and can have CFI prototype information prefixed
> to them.
> 
> As protype prefix information is just some random bytes, it is
> not possible to "fall through" into an assembly function that
> is tagged with SYM_TYPED_FUNC_START(): there will be some
> binary noise in front of the function so this design pattern
> needs to be explicitly avoided at each site where it occurred.
> 
> The approach to binding the calls to C is two-fold:
> 
> - Either convert the affected vtable struct to C and provide
>   per-CPU prototypes for all the calls (done for TLB, cache)
>   or:
> 
> - Provide prototypes in a special files just for CFI and tag
>   all these functions addressable.
> 
> The permissive mode handles the new breakpoint type (0x03) that
> LLVM CLANG is emitting.
> 
> To runtime-test the patches:
> - Enable CONFIG_LKDTM
> - echo CFI_FORWARD_PROTO > /sys/kernel/debug/provoke-crash/DIRECT
> 
> The patch set has been booted to userspace on the following
> test platforms:
> 
> - Arm Versatile (QEMU)
> - Arm Versatile Express (QEMU)
> - multi_v7 booted on Versatile Express (QEMU)
> - Footbridge Netwinder (SA110 ARMv4)
> - Ux500 (ARMv7 SMP)
> - Gemini (FA526)
> 
> I am not saying there will not be corner cases that we need
> to fix in addition to this, but it is enough to get started.
> Looking at what was fixed for arm64 I am a bit weary that
> e.g. BPF might need something to trampoline properly.
> 
> But hopefullt people can get to testing it and help me fix
> remaining issues before the final version, or we can fix it
> in-tree.
> 
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

For the series:

Tested-by: Kees Cook <keescook@chromium.org>

Thanks for making this work!

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Re: [PATCH v4 0/8] CFI for ARM32 using LLVM

[Linus Walleij]

On Thu, Mar 28, 2024 at 9:19 AM Linus Walleij <linus.walleij@linaro.org> wrote:

> This is a first patch set to support CLANG CFI (Control Flow
> Integrity) on ARM32.

Not much reaction to this apart from Kees' ACK and I think
most patches are pretty straight-forward so I'll soon put them
in Russell's tracker, I can always update them if there is some
issue.

As mentioned, there will be some rough edges (e.g. eBPF)
but a slew of machines boot fine with it and it should be able
to provide additional hardening on a slew of embedded use
cases.

Yours,
Linus Walleij

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Re: [PATCH v4 0/8] CFI for ARM32 using LLVM

[Nathan Chancellor]

On Fri, Apr 12, 2024 at 09:38:24AM +0200, Linus Walleij wrote:
> On Thu, Mar 28, 2024 at 9:19 AM Linus Walleij <linus.walleij@linaro.org> wrote:
> 
> > This is a first patch set to support CLANG CFI (Control Flow
> > Integrity) on ARM32.
> 
> Not much reaction to this apart from Kees' ACK and I think
> most patches are pretty straight-forward so I'll soon put them
> in Russell's tracker, I can always update them if there is some
> issue.

I've given the patches a quick glance and I do not see anything
obviously wrong so consider this a soft LGTM. Given that it is an option
and I am sure there are arm64 and x86_64 configurations that are not
clean, I don't think having all CFI issues patched before the support
lands is necessary or desirable.

> As mentioned, there will be some rough edges (e.g. eBPF)
> but a slew of machines boot fine with it and it should be able
> to provide additional hardening on a slew of embedded use
> cases.

Agreed.

I will try to file an issue for the EFI issue I noticed before so that
it can be investigated and fixed at some point.

Cheers,
Nathan

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