diff options
| -rw-r--r-- | arch/powerpc/lib/Makefile | 2 | ||||
| -rw-r--r-- | arch/powerpc/lib/code-patching.c | 21 | ||||
| -rw-r--r-- | arch/powerpc/lib/test_code-patching.S | 20 |
3 files changed, 42 insertions, 1 deletions
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile index 546591848219..5e994cda8e40 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 +obj-y += alloc.o code-patching.o feature-fixups.o pmem.o inst.o test_code-patching.o ifndef CONFIG_KASAN obj-y += string.o memcmp_$(BITS).o diff --git a/arch/powerpc/lib/code-patching.c b/arch/powerpc/lib/code-patching.c index e9a0ea1c7ba4..64cf621e5b00 100644 --- a/arch/powerpc/lib/code-patching.c +++ b/arch/powerpc/lib/code-patching.c @@ -708,6 +708,26 @@ static void __init test_translate_branch(void) vfree(buf); } +#ifdef CONFIG_PPC64 +static void __init test_prefixed_patching(void) +{ + extern unsigned int code_patching_test1[]; + extern unsigned int code_patching_test1_expected[]; + extern unsigned int end_code_patching_test1[]; + + __patch_instruction((struct ppc_inst *)code_patching_test1, + ppc_inst_prefix(OP_PREFIX << 26, 0x00000000), + (struct ppc_inst *)code_patching_test1); + + check(!memcmp(code_patching_test1, + code_patching_test1_expected, + sizeof(unsigned int) * + (end_code_patching_test1 - code_patching_test1))); +} +#else +static inline void test_prefixed_patching(void) {} +#endif + static int __init test_code_patching(void) { printk(KERN_DEBUG "Running code patching self-tests ...\n"); @@ -716,6 +736,7 @@ static int __init test_code_patching(void) test_branch_bform(); test_create_function_call(); test_translate_branch(); + test_prefixed_patching(); return 0; } diff --git a/arch/powerpc/lib/test_code-patching.S b/arch/powerpc/lib/test_code-patching.S new file mode 100644 index 000000000000..a9be6107844e --- /dev/null +++ b/arch/powerpc/lib/test_code-patching.S @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2020 IBM Corporation + */ +#include <asm/ppc-opcode.h> + + .text + +#define globl(x) \ + .globl x; \ +x: + +globl(code_patching_test1) + nop + nop +globl(end_code_patching_test1) + +globl(code_patching_test1_expected) + .long OP_PREFIX << 26 + .long 0x0000000 |