Date:	Tue, 19 May 2015 20:38:21 +0530
From:	Anshuman Khandual <khandual@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org
Cc:	peterz@...radead.org, akpm@...ux-foundation.org,
	tglx@...utronix.de, james.hogan@...tec.com, avagin@...nvz.org,
	Paul.Clothier@...tec.com, palves@...hat.com, oleg@...hat.com,
	dhowells@...hat.com, davej@...hat.com, davem@...emloft.net,
	mikey@...ling.org, benh@...nel.crashing.org,
	sukadev@...ux.vnet.ibm.com, mpe@...erman.id.au,
	sam.bobroff@....ibm.com, kirjanov@...il.com,
	shuahkh@....samsung.com, Ulrich.Weigand@...ibm.com,
	emachado@...ux.vnet.ibm.com, nacc@...ux.vnet.ibm.com
Subject: [PATCH V8 25/28] selftests, powerpc: Add ptrace tests for VSX, VMX registers in TM

This patch adds ptrace interface test for VSX, VMX registers
inside TM context. This also adds ptrace interface based helper
functions related to chckpointed VSX, VMX registers access.

Signed-off-by: Anshuman Khandual <khandual@...ux.vnet.ibm.com>
---
 tools/testing/selftests/powerpc/ptrace/Makefile    |   3 +-
 .../selftests/powerpc/ptrace/ptrace-tm-vsx.c       | 195 +++++++++++++++++++++
 2 files changed, 197 insertions(+), 1 deletion(-)
 create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-vsx.c

diff --git a/tools/testing/selftests/powerpc/ptrace/Makefile b/tools/testing/selftests/powerpc/ptrace/Makefile
index 1c5437e..092fbef 100644
--- a/tools/testing/selftests/powerpc/ptrace/Makefile
+++ b/tools/testing/selftests/powerpc/ptrace/Makefile
@@ -1,5 +1,6 @@
 TEST_PROGS := ptrace-ebb ptrace-gpr ptrace-tm-gpr ptrace-tm-spd-gpr \
-ptrace-tar ptrace-tm-tar ptrace-tm-spd-tar ptrace-vsx
+ptrace-tar ptrace-tm-tar ptrace-tm-spd-tar ptrace-vsx ptrace-tm-vsx
+
 
 all: $(TEST_PROGS)
 
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-tm-vsx.c b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-vsx.c
new file mode 100644
index 0000000..2d218c9
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-vsx.c
@@ -0,0 +1,195 @@
+/*
+ * Ptrace test for VMX/VSX registers in the TM context
+ *
+ * Copyright 2015 Anshuman Khandual, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include "ptrace.h"
+#include "ptrace-vsx.h"
+
+int shm_id;
+volatile int *cptr, *pptr;
+
+extern void loadvsx(void *p, int tmp);
+extern void storevsx(void *p, int tmp);
+
+unsigned long fp_load[VEC_MAX];
+unsigned long fp_store[VEC_MAX];
+unsigned long fp_load_ckpt[VEC_MAX];
+unsigned long fp_load_ckpt_new[VEC_MAX];
+
+__attribute__((used)) void load_vsx(void)
+{
+	loadvsx(fp_load, 0);
+}
+
+__attribute__((used)) void load_vsx_ckpt(void)
+{
+	loadvsx(fp_load_ckpt, 0);
+}
+
+void tm_vsx(void)
+{
+	unsigned long result, texasr;
+	int ret;
+
+	cptr = (int *)shmat(shm_id, NULL, 0);
+trans:
+	asm __volatile__(
+		"bl load_vsx_ckpt;"
+
+		"1: ;"
+		TBEGIN
+		"beq 2f;"
+
+		"bl load_vsx;"
+		"b .;"
+
+		TEND
+		"li 0, 0;"
+		"ori %[res], 0, 0;"
+		"b 3f;"
+
+		"2: ;"
+		"li 0, 1;"
+		"ori %[res], 0, 0;"
+		"mfspr %[texasr], %[sprn_texasr];"
+
+		"3: ;"
+		: [res] "=r" (result), [texasr] "=r" (texasr)
+		: [fp_load] "r" (fp_load), [fp_load_ckpt] "r" (fp_load_ckpt), [sprn_texasr] "i"  (SPRN_TEXASR)
+		: "memory", "r0", "r1", "r2", "r3", "r4", "r8", "r9", "r10", "r11"
+		);
+
+	if (result) {
+		if (!cptr[0])
+			goto trans;
+		shmdt((void *)cptr);
+
+		storevsx(fp_store, 0);
+		ret = compare_vsx_vmx(fp_store, fp_load_ckpt_new);
+		if (ret)
+			exit(1);
+		exit(0);
+	}
+	exit(1);
+}
+
+int trace_tm_vsx(pid_t child)
+{
+	unsigned long vsx[VSX_MAX];
+	unsigned long vmx[VMX_MAX + 2][2];
+	int ret;
+
+	sleep(1);
+	ret = start_trace(child);
+	if (ret)
+		return TEST_FAIL;
+
+	ret = show_vsx(child, vsx);
+	if (ret)
+		return TEST_FAIL;
+
+	ret = validate_vsx(vsx, fp_load);
+	if (ret)
+		return TEST_FAIL;
+
+	ret = show_vmx(child, vmx);
+	if (ret)
+		return TEST_FAIL;
+
+	ret = validate_vmx(vmx, fp_load);
+	if (ret)
+		return TEST_FAIL;
+
+	ret = show_vsx_ckpt(child, vsx);
+	if (ret)
+		return TEST_FAIL;
+
+	ret = validate_vsx(vsx, fp_load_ckpt);
+	if (ret)
+		return TEST_FAIL;
+
+	ret = show_vmx_ckpt(child, vmx);
+	if (ret)
+		return TEST_FAIL;
+
+	ret = validate_vmx(vmx, fp_load_ckpt);
+	if (ret)
+		return TEST_FAIL;
+
+	memset(vsx, 0, sizeof(vsx));
+	memset(vmx, 0, sizeof(vmx));
+
+	load_vsx_vmx(fp_load_ckpt_new, vsx, vmx);
+
+	ret = write_vsx_ckpt(child, vsx);
+	if (ret)
+		return TEST_FAIL;
+
+	ret = write_vmx_ckpt(child, vmx);
+	if (ret)
+		return TEST_FAIL;
+
+	ret = stop_trace(child);
+	if (ret)
+		return TEST_FAIL;
+
+	return TEST_PASS;
+}
+
+int ptrace_tm_vsx(void)
+{
+	pid_t pid;
+	int ret, status, i;
+
+	shm_id = shmget(IPC_PRIVATE, sizeof(int) * 1, 0777|IPC_CREAT);
+
+	for(i = 0; i < 128; i++) {
+		fp_load[i] = 1 + rand();
+		fp_load_ckpt[i] = 1 + 2 * rand();
+		fp_load_ckpt_new[i] = 1 + 3 * rand();
+	}
+
+	pid = fork();
+	if (pid < 0) {
+		perror("fork() failed");
+		return TEST_FAIL;
+	}
+
+	if (pid == 0)
+		tm_vsx();
+
+	if (pid) {
+		pptr = (int *)shmat(shm_id, NULL, 0);
+		ret = trace_tm_vsx(pid);
+		if (ret) {
+			kill(pid, SIGKILL);
+			return TEST_FAIL;
+		}
+
+		pptr[0] = 1;
+		shmdt((void *)pptr);
+		ret = wait(&status);
+		if (ret != pid) {
+			printf("Child's exit status not captured\n");
+			return TEST_FAIL;
+		}
+
+		if (WIFEXITED(status)) {
+			if(WEXITSTATUS(status))
+				return TEST_FAIL;
+		}
+		return TEST_PASS;
+	}
+	return TEST_PASS;
+}
+
+int main(int argc, char *argv[])
+{
+	return test_harness(ptrace_tm_vsx, "ptrace_tm_vsx");
+}
-- 
2.1.0

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