Expand the code-patching self-tests to includes tests for patching
prefixed instructions.
Signed-off-by: Jordan Niethe <jniet...@gmail.com>
---
v6: New to series
---
arch/powerpc/lib/Makefile | 2 +-
arch/powerpc/lib/code-patching.c | 21 +++++++++++++++++++++
arch/powerpc/lib/test_code-patching.S | 19 +++++++++++++++++++
3 files changed, 41 insertions(+), 1 deletion(-)
create mode 100644 arch/powerpc/lib/test_code-patching.S
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 dd2f982bb29e..ad5754c5f007 100644
--- a/arch/powerpc/lib/code-patching.c
+++ b/arch/powerpc/lib/code-patching.c
@@ -700,6 +700,24 @@ static void __init test_translate_branch(void)
vfree(buf);
}
+#ifdef __powerpc64__
+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(1 << 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)));
+}
+#endif
+
static int __init test_code_patching(void)
{
printk(KERN_DEBUG "Running code patching self-tests ...\n");
@@ -708,6 +726,9 @@ static int __init test_code_patching(void)
test_branch_bform();
test_create_function_call();
test_translate_branch();
+#ifdef __powerpc64__
+ test_prefixed_patching();
+#endif
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..91aab208a804
--- /dev/null
+++ b/arch/powerpc/lib/test_code-patching.S
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 IBM Corporation
+ */
+
+ .text
+
+#define globl(x) \
+ .globl x; \
+x:
+
+globl(code_patching_test1)
+ nop
+ nop
+globl(end_code_patching_test1)
+
+globl(code_patching_test1_expected)
+ .long 1 << 26
+ .long 0x0000000
--
2.17.1
