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
WARNING: multiple messages have this Message-ID (diff)
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: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.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
next prev parent reply other threads:[~2021-04-13 16:40 UTC|newest] Thread overview: 10+ 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 ` 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 ` Christophe Leroy 2021-04-13 16:40 ` [PATCH v2 3/4] powerpc: Rename probe_kernel_read_inst() Christophe Leroy 2021-04-13 16:40 ` 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] 2021-04-13 16:40 ` [PATCH v2 4/4] powerpc: Move copy_from_kernel_nofault_inst() Christophe Leroy
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