Extend the code patching selftests with some basic coverage of the new data patching variants too.
Signed-off-by: Benjamin Gray <bg...@linux.ibm.com> --- v3: * New in v3 --- arch/powerpc/lib/test-code-patching.c | 36 +++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/arch/powerpc/lib/test-code-patching.c b/arch/powerpc/lib/test-code-patching.c index c44823292f73..e96c48fcd4db 100644 --- a/arch/powerpc/lib/test-code-patching.c +++ b/arch/powerpc/lib/test-code-patching.c @@ -347,6 +347,41 @@ static void __init test_prefixed_patching(void) check(!memcmp(iptr, expected, sizeof(expected))); } +static void __init test_data_patching(void) +{ + void *buf; + u32 *addr32; + + buf = vzalloc(PAGE_SIZE); + check(buf); + if (!buf) + return; + + addr32 = buf + 128; + + addr32[1] = 0xA0A1A2A3; + addr32[2] = 0xB0B1B2B3; + + patch_uint(&addr32[1], 0xC0C1C2C3); + + check(addr32[0] == 0); + check(addr32[1] == 0xC0C1C2C3); + check(addr32[2] == 0xB0B1B2B3); + check(addr32[3] == 0); + + patch_ulong(&addr32[1], 0xD0D1D2D3); + + check(addr32[0] == 0); + *(unsigned long *)(&addr32[1]) = 0xD0D1D2D3; + + if (!IS_ENABLED(CONFIG_PPC64)) + check(addr32[2] == 0xB0B1B2B3); + + check(addr32[3] == 0); + + vfree(buf); +} + static int __init test_code_patching(void) { pr_info("Running code patching self-tests ...\n"); @@ -356,6 +391,7 @@ static int __init test_code_patching(void) test_create_function_call(); test_translate_branch(); test_prefixed_patching(); + test_data_patching(); return 0; } -- 2.44.0