From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
jniethe5@gmail.com
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v2 4/4] powerpc: Move copy_from_kernel_nofault_inst()
Date: Tue, 13 Apr 2021 16:40:10 +0000 (UTC) [thread overview]
Message-ID: <dca10b8ff2414ac580dc2726a608fc982ca0b022.1618331980.git.christophe.leroy@csgroup.eu> (raw)
In-Reply-To: <857ceb23b6a614aea2522e770b067593d5f9e906.1618331980.git.christophe.leroy@csgroup.eu>
When probe_kernel_read_inst() was created, there was no good place to
put it, so a file called lib/inst.c was dedicated for it.
Since then, probe_kernel_read_inst() has been renamed
copy_from_kernel_nofault_inst(). And mm/maccess.h didn't exist at that
time. Today, mm/maccess.h is related to copy_from_kernel_nofault().
Move copy_from_kernel_nofault_inst() into mm/maccess.c
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
v2: Remove inst.o from Makefile
---
arch/powerpc/lib/Makefile | 2 +-
arch/powerpc/lib/inst.c | 26 --------------------------
arch/powerpc/mm/maccess.c | 21 +++++++++++++++++++++
3 files changed, 22 insertions(+), 27 deletions(-)
delete mode 100644 arch/powerpc/lib/inst.c
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index d4efc182662a..f2c690ee75d1 100644
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -16,7 +16,7 @@ CFLAGS_code-patching.o += -DDISABLE_BRANCH_PROFILING
CFLAGS_feature-fixups.o += -DDISABLE_BRANCH_PROFILING
endif
-obj-y += alloc.o code-patching.o feature-fixups.o pmem.o inst.o test_code-patching.o
+obj-y += alloc.o code-patching.o feature-fixups.o pmem.o test_code-patching.o
ifndef CONFIG_KASAN
obj-y += string.o memcmp_$(BITS).o
diff --git a/arch/powerpc/lib/inst.c b/arch/powerpc/lib/inst.c
deleted file mode 100644
index ec7f6bae8b3c..000000000000
--- a/arch/powerpc/lib/inst.c
+++ /dev/null
@@ -1,26 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright 2020, IBM Corporation.
- */
-
-#include <linux/uaccess.h>
-#include <asm/disassemble.h>
-#include <asm/inst.h>
-#include <asm/ppc-opcode.h>
-
-int copy_from_kernel_nofault_inst(struct ppc_inst *inst, struct ppc_inst *src)
-{
- unsigned int val, suffix;
- int err;
-
- err = copy_from_kernel_nofault(&val, src, sizeof(val));
- if (err)
- return err;
- if (IS_ENABLED(CONFIG_PPC64) && get_op(val) == OP_PREFIX) {
- err = copy_from_kernel_nofault(&suffix, (void *)src + 4, 4);
- *inst = ppc_inst_prefix(val, suffix);
- } else {
- *inst = ppc_inst(val);
- }
- return err;
-}
diff --git a/arch/powerpc/mm/maccess.c b/arch/powerpc/mm/maccess.c
index fa9a7a718fc6..e75e74c52a8a 100644
--- a/arch/powerpc/mm/maccess.c
+++ b/arch/powerpc/mm/maccess.c
@@ -3,7 +3,28 @@
#include <linux/uaccess.h>
#include <linux/kernel.h>
+#include <asm/disassemble.h>
+#include <asm/inst.h>
+#include <asm/ppc-opcode.h>
+
bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size)
{
return is_kernel_addr((unsigned long)unsafe_src);
}
+
+int copy_from_kernel_nofault_inst(struct ppc_inst *inst, struct ppc_inst *src)
+{
+ unsigned int val, suffix;
+ int err;
+
+ err = copy_from_kernel_nofault(&val, src, sizeof(val));
+ if (err)
+ return err;
+ if (IS_ENABLED(CONFIG_PPC64) && get_op(val) == OP_PREFIX) {
+ err = copy_from_kernel_nofault(&suffix, (void *)src + 4, 4);
+ *inst = ppc_inst_prefix(val, suffix);
+ } else {
+ *inst = ppc_inst(val);
+ }
+ return err;
+}
--
2.25.0
prev parent reply other threads:[~2021-04-13 16:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-13 16:40 [PATCH v2 1/4] powerpc: Remove probe_user_read_inst() Christophe Leroy
2021-04-13 16:40 ` [PATCH v2 2/4] powerpc: Make probe_kernel_read_inst() common to PPC32 and PPC64 Christophe Leroy
2021-04-13 16:40 ` [PATCH v2 3/4] powerpc: Rename probe_kernel_read_inst() Christophe Leroy
2021-04-14 5:23 ` Aneesh Kumar K.V
2021-04-14 12:57 ` Christophe Leroy
2021-04-13 16:40 ` Christophe Leroy [this message]
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