From 5f154c4e20d7edd38bddec78f3e0a7628057ef76 Mon Sep 17 00:00:00 2001
From: Julien Thierry <jthierry@redhat.com>
Date: Wed, 3 Mar 2021 18:05:29 +0100
Subject: arm64: Move patching utilities out of instruction encoding/decoding

Files insn.[c|h] containt some functions used for instruction patching.
In order to reuse the instruction encoder/decoder, move the patching
utilities to their own file.

Signed-off-by: Julien Thierry <jthierry@redhat.com>
Link: https://lore.kernel.org/r/20210303170536.1838032-2-jthierry@redhat.com
[will: Include patching.h in insn.h to fix header mess; add __ASSEMBLY__ guards]
Signed-off-by: Will Deacon <will@kernel.org>

Signed-off-by: Will Deacon <will@kernel.org>
---
 arch/arm64/include/asm/patching.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 arch/arm64/include/asm/patching.h

(limited to 'arch/arm64/include/asm/patching.h')

diff --git a/arch/arm64/include/asm/patching.h b/arch/arm64/include/asm/patching.h
new file mode 100644
index 000000000000..5ebab129222f
--- /dev/null
+++ b/arch/arm64/include/asm/patching.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef	__ASM_PATCHING_H
+#define	__ASM_PATCHING_H
+
+#include <linux/types.h>
+
+#ifndef __ASSEMBLY__
+int aarch64_insn_read(void *addr, u32 *insnp);
+int aarch64_insn_write(void *addr, u32 insn);
+
+int aarch64_insn_patch_text_nosync(void *addr, u32 insn);
+int aarch64_insn_patch_text(void *addrs[], u32 insns[], int cnt);
+#endif /* __ASSEMBLY__ */
+
+#endif	/* __ASM_PATCHING_H */
-- 
cgit v1.2.3


From 78b92c7337e10519312e8aab64d7a1651206bd61 Mon Sep 17 00:00:00 2001
From: Mark Rutland <mark.rutland@arm.com>
Date: Wed, 9 Jun 2021 11:23:00 +0100
Subject: arm64: insn: decouple patching from insn code

Currently, <asm/insn.h> includes <asm/patching.h>. We intend that
<asm/insn.h> will be usable from userspace, so it doesn't make sense to
include headers for kernel-only features such as the patching routines,
and we'd intended to restrict <asm/insn.h> to instruction encoding
details.

Let's decouple the patching code from <asm/insn.h>, and explicitly
include <asm/patching.h> where it is needed. Since <asm/patching.h>
isn't included from assembly, we can drop the __ASSEMBLY__ guards.

At the same time, sort the kprobes includes so that it's easier to see
what is and isn't incldued.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20210609102301.17332-2-mark.rutland@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
---
 arch/arm64/include/asm/insn.h      |  1 -
 arch/arm64/include/asm/patching.h  |  2 --
 arch/arm64/kernel/ftrace.c         |  1 +
 arch/arm64/kernel/jump_label.c     |  1 +
 arch/arm64/kernel/kgdb.c           |  1 +
 arch/arm64/kernel/patching.c       |  1 +
 arch/arm64/kernel/probes/kprobes.c | 18 ++++++++++--------
 arch/arm64/kernel/traps.c          |  1 +
 8 files changed, 15 insertions(+), 11 deletions(-)

(limited to 'arch/arm64/include/asm/patching.h')

diff --git a/arch/arm64/include/asm/insn.h b/arch/arm64/include/asm/insn.h
index 1ea9611545bb..a6f3f45fc46f 100644
--- a/arch/arm64/include/asm/insn.h
+++ b/arch/arm64/include/asm/insn.h
@@ -11,7 +11,6 @@
 #include <linux/types.h>
 
 #include <asm/alternative.h>
-#include <asm/patching.h>
 
 #ifndef __ASSEMBLY__
 /*
diff --git a/arch/arm64/include/asm/patching.h b/arch/arm64/include/asm/patching.h
index 5ebab129222f..6bf5adc56295 100644
--- a/arch/arm64/include/asm/patching.h
+++ b/arch/arm64/include/asm/patching.h
@@ -4,12 +4,10 @@
 
 #include <linux/types.h>
 
-#ifndef __ASSEMBLY__
 int aarch64_insn_read(void *addr, u32 *insnp);
 int aarch64_insn_write(void *addr, u32 insn);
 
 int aarch64_insn_patch_text_nosync(void *addr, u32 insn);
 int aarch64_insn_patch_text(void *addrs[], u32 insns[], int cnt);
-#endif /* __ASSEMBLY__ */
 
 #endif	/* __ASM_PATCHING_H */
diff --git a/arch/arm64/kernel/ftrace.c b/arch/arm64/kernel/ftrace.c
index b5d3ddaf69d9..7f467bd9db7a 100644
--- a/arch/arm64/kernel/ftrace.c
+++ b/arch/arm64/kernel/ftrace.c
@@ -15,6 +15,7 @@
 #include <asm/debug-monitors.h>
 #include <asm/ftrace.h>
 #include <asm/insn.h>
+#include <asm/patching.h>
 
 #ifdef CONFIG_DYNAMIC_FTRACE
 /*
diff --git a/arch/arm64/kernel/jump_label.c b/arch/arm64/kernel/jump_label.c
index 9a8a0ae1e75f..fc98037e1220 100644
--- a/arch/arm64/kernel/jump_label.c
+++ b/arch/arm64/kernel/jump_label.c
@@ -8,6 +8,7 @@
 #include <linux/kernel.h>
 #include <linux/jump_label.h>
 #include <asm/insn.h>
+#include <asm/patching.h>
 
 void arch_jump_label_transform(struct jump_entry *entry,
 			       enum jump_label_type type)
diff --git a/arch/arm64/kernel/kgdb.c b/arch/arm64/kernel/kgdb.c
index 1a157ca33262..2aede780fb80 100644
--- a/arch/arm64/kernel/kgdb.c
+++ b/arch/arm64/kernel/kgdb.c
@@ -17,6 +17,7 @@
 
 #include <asm/debug-monitors.h>
 #include <asm/insn.h>
+#include <asm/patching.h>
 #include <asm/traps.h>
 
 struct dbg_reg_def_t dbg_reg_def[DBG_MAX_REG_NUM] = {
diff --git a/arch/arm64/kernel/patching.c b/arch/arm64/kernel/patching.c
index 9d050e33901b..7aa55b33c8c7 100644
--- a/arch/arm64/kernel/patching.c
+++ b/arch/arm64/kernel/patching.c
@@ -9,6 +9,7 @@
 #include <asm/cacheflush.h>
 #include <asm/fixmap.h>
 #include <asm/kprobes.h>
+#include <asm/patching.h>
 #include <asm/sections.h>
 
 static DEFINE_RAW_SPINLOCK(patch_lock);
diff --git a/arch/arm64/kernel/probes/kprobes.c b/arch/arm64/kernel/probes/kprobes.c
index d607c9912025..609edde7a5dd 100644
--- a/arch/arm64/kernel/probes/kprobes.c
+++ b/arch/arm64/kernel/probes/kprobes.c
@@ -7,26 +7,28 @@
  * Copyright (C) 2013 Linaro Limited.
  * Author: Sandeepa Prabhu <sandeepa.prabhu@linaro.org>
  */
+#include <linux/extable.h>
 #include <linux/kasan.h>
 #include <linux/kernel.h>
 #include <linux/kprobes.h>
-#include <linux/extable.h>
-#include <linux/slab.h>
-#include <linux/stop_machine.h>
 #include <linux/sched/debug.h>
 #include <linux/set_memory.h>
+#include <linux/slab.h>
+#include <linux/stop_machine.h>
 #include <linux/stringify.h>
+#include <linux/uaccess.h>
 #include <linux/vmalloc.h>
-#include <asm/traps.h>
-#include <asm/ptrace.h>
+
 #include <asm/cacheflush.h>
-#include <asm/debug-monitors.h>
 #include <asm/daifflags.h>
-#include <asm/system_misc.h>
+#include <asm/debug-monitors.h>
 #include <asm/insn.h>
-#include <linux/uaccess.h>
 #include <asm/irq.h>
+#include <asm/patching.h>
+#include <asm/ptrace.h>
 #include <asm/sections.h>
+#include <asm/system_misc.h>
+#include <asm/traps.h>
 
 #include "decode-insn.h"
 
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c
index 9b683b2381cf..48ff6fb888e0 100644
--- a/arch/arm64/kernel/traps.c
+++ b/arch/arm64/kernel/traps.c
@@ -37,6 +37,7 @@
 #include <asm/exception.h>
 #include <asm/extable.h>
 #include <asm/kprobes.h>
+#include <asm/patching.h>
 #include <asm/traps.h>
 #include <asm/smp.h>
 #include <asm/stack_pointer.h>
-- 
cgit v1.2.3