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From: Jordan Niethe <jniethe5@gmail.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: alistair@popple.id.au, npiggin@gmail.com, bala24@linux.ibm.com,
	naveen.n.rao@linux.vnet.ibm.com,
	Jordan Niethe <jniethe5@gmail.com>,
	dja@axtens.net
Subject: [PATCH v7 24/28] powerpc: Test prefixed code patching
Date: Fri,  1 May 2020 13:42:16 +1000	[thread overview]
Message-ID: <20200501034220.8982-25-jniethe5@gmail.com> (raw)
In-Reply-To: <20200501034220.8982-1-jniethe5@gmail.com>

Expand the code-patching self-tests to includes tests for patching
prefixed instructions.

Signed-off-by: Jordan Niethe <jniethe5@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 b32fa707725e..7107c6d01261 100644
--- a/arch/powerpc/lib/code-patching.c
+++ b/arch/powerpc/lib/code-patching.c
@@ -699,6 +699,24 @@ 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");
@@ -707,6 +725,9 @@ 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


  parent reply	other threads:[~2020-05-01  4:32 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-01  3:41 [PATCH v7 00/28] Initial Prefixed Instruction support Jordan Niethe
2020-05-01  3:41 ` [PATCH v7 01/28] powerpc/xmon: Remove store_inst() for patch_instruction() Jordan Niethe
2020-05-01  3:41 ` [PATCH v7 02/28] powerpc/xmon: Move breakpoint instructions to own array Jordan Niethe
2020-05-04  5:41   ` Alistair Popple
2020-05-04  5:52     ` Jordan Niethe
2020-05-01  3:41 ` [PATCH v7 03/28] powerpc/xmon: Move breakpoints to text section Jordan Niethe
2020-05-01  3:41 ` [PATCH v7 04/28] powerpc/xmon: Use bitwise calculations in_breakpoint_table() Jordan Niethe
2020-05-04  5:41   ` Alistair Popple
2020-05-05  7:08   ` Michael Ellerman
2020-05-05  7:31     ` Jordan Niethe
2020-05-01  3:41 ` [PATCH v7 05/28] powerpc: Change calling convention for create_branch() et. al Jordan Niethe
2020-05-04  2:55   ` Alistair Popple
2020-05-01  3:41 ` [PATCH v7 06/28] powerpc: Use a macro for creating instructions from u32s Jordan Niethe
2020-05-04  5:54   ` Alistair Popple
2020-05-01  3:41 ` [PATCH v7 07/28] powerpc: Use an accessor for instructions Jordan Niethe
2020-05-01  3:42 ` [PATCH v7 08/28] powerpc: Use a function for getting the instruction op code Jordan Niethe
2020-05-04  8:01   ` Alistair Popple
2020-05-01  3:42 ` [PATCH v7 09/28] powerpc: Use a function for byte swapping instructions Jordan Niethe
2020-05-01  3:42 ` [PATCH v7 10/28] powerpc: Introduce functions for instruction equality Jordan Niethe
2020-05-01  3:42 ` [PATCH v7 11/28] powerpc: Use a datatype for instructions Jordan Niethe
2020-05-02 14:29   ` kbuild test robot
2020-05-02 14:29     ` kbuild test robot
2020-05-01  3:42 ` [PATCH v7 12/28] powerpc: Use a function for reading instructions Jordan Niethe
2020-05-04  8:26   ` Alistair Popple
2020-05-01  3:42 ` [PATCH v7 13/28] powerpc: Add a probe_user_read_inst() function Jordan Niethe
2020-05-04  8:30   ` Alistair Popple
2020-05-01  3:42 ` [PATCH v7 14/28] powerpc: Add a probe_kernel_read_inst() function Jordan Niethe
2020-05-04  9:24   ` Alistair Popple
2020-05-01  3:42 ` [PATCH v7 15/28] powerpc/kprobes: Use patch_instruction() Jordan Niethe
2020-05-05  1:41   ` Alistair Popple
2020-05-01  3:42 ` [PATCH v7 16/28] powerpc: Define and use __get_user_instr{, inatomic}() Jordan Niethe
2020-05-05  1:46   ` Alistair Popple
2020-05-01  3:42 ` [PATCH v7 17/28] powerpc: Introduce a function for reporting instruction length Jordan Niethe
2020-05-05  2:02   ` Alistair Popple
2020-05-01  3:42 ` [PATCH v7 18/28] powerpc/xmon: Use a function for reading instructions Jordan Niethe
2020-05-05  2:07   ` Alistair Popple
2020-05-01  3:42 ` [PATCH v7 19/28] powerpc/xmon: Move insertion of breakpoint for xol'ing Jordan Niethe
2020-05-05  2:19   ` Alistair Popple
2020-05-01  3:42 ` [PATCH v7 20/28] powerpc: Make test_translate_branch() independent of instruction length Jordan Niethe
2020-05-05  2:40   ` Alistair Popple
2020-05-01  3:42 ` [PATCH v7 21/28] powerpc: Enable Prefixed Instructions Jordan Niethe
2020-05-01  3:42 ` [PATCH v7 22/28] powerpc: Define new SRR1 bits for a future ISA version Jordan Niethe
2020-05-05  2:49   ` Alistair Popple
2020-05-01  3:42 ` [PATCH v7 23/28] powerpc: Add prefixed instructions to instruction data type Jordan Niethe
2020-05-05  6:04   ` Alistair Popple
2020-05-01  3:42 ` Jordan Niethe [this message]
2020-05-05  6:08   ` [PATCH v7 24/28] powerpc: Test prefixed code patching Alistair Popple
2020-05-01  3:42 ` [PATCH v7 25/28] powerpc: Test prefixed instructions in feature fixups Jordan Niethe
2020-05-05  7:15   ` Alistair Popple
2020-05-05  7:34     ` Jordan Niethe
2020-05-01  3:42 ` [PATCH v7 26/28] powerpc: Support prefixed instructions in alignment handler Jordan Niethe
2020-05-05  7:17   ` Alistair Popple
2020-05-01  3:42 ` [PATCH v7 27/28] powerpc sstep: Add support for prefixed load/stores Jordan Niethe
2020-05-01  3:42 ` [PATCH v7 28/28] powerpc sstep: Add support for prefixed fixed-point arithmetic Jordan Niethe

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