[LTP] [PATCH] Add case about arch_prctl syscall.

[lufei]

Add testcase about arch_prctl syscall.

Signed-off-by: Lu Fei <lufei@uniontech.com>
---
 configure.ac                                  |  1 +
 runtest/syscalls                              |  2 +
 .../kernel/syscalls/arch_prctl/.gitignore     |  1 +
 testcases/kernel/syscalls/arch_prctl/Makefile |  8 ++
 .../kernel/syscalls/arch_prctl/arch_prctl01.c | 82 +++++++++++++++++++
 5 files changed, 94 insertions(+)
 create mode 100644 testcases/kernel/syscalls/arch_prctl/.gitignore
 create mode 100644 testcases/kernel/syscalls/arch_prctl/Makefile
 create mode 100644 testcases/kernel/syscalls/arch_prctl/arch_prctl01.c

diff --git a/configure.ac b/configure.ac
index 1d7e862d8..0dcaddc0f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -41,6 +41,7 @@ AC_CHECK_DECLS([SEM_STAT_ANY],,,[#include <sys/sem.h>])
 
 AC_CHECK_HEADERS_ONCE([ \
     asm/ldt.h \
+    asm/prctl.h \
     cpuid.h \
     emmintrin.h \
     ifaddrs.h \
diff --git a/runtest/syscalls b/runtest/syscalls
index 7794f1465..505b4243d 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -31,6 +31,8 @@ alarm05 alarm05
 alarm06 alarm06
 alarm07 alarm07
 
+arch_prctl01 arch_prctl01
+
 bind01 bind01
 bind02 bind02
 bind03 bind03
diff --git a/testcases/kernel/syscalls/arch_prctl/.gitignore b/testcases/kernel/syscalls/arch_prctl/.gitignore
new file mode 100644
index 000000000..24871e249
--- /dev/null
+++ b/testcases/kernel/syscalls/arch_prctl/.gitignore
@@ -0,0 +1 @@
+/arch_prctl01
diff --git a/testcases/kernel/syscalls/arch_prctl/Makefile b/testcases/kernel/syscalls/arch_prctl/Makefile
new file mode 100644
index 000000000..272949d57
--- /dev/null
+++ b/testcases/kernel/syscalls/arch_prctl/Makefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Copyright (c) UnionTech Software Technology Co.,Ltd. 2024
+
+top_srcdir		?= ../../../..
+
+include $(top_srcdir)/include/mk/testcases.mk
+
+include $(top_srcdir)/include/mk/generic_leaf_target.mk
diff --git a/testcases/kernel/syscalls/arch_prctl/arch_prctl01.c b/testcases/kernel/syscalls/arch_prctl/arch_prctl01.c
new file mode 100644
index 000000000..e30b5667a
--- /dev/null
+++ b/testcases/kernel/syscalls/arch_prctl/arch_prctl01.c
@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) UnionTech Software Technology Co.,Ltd., 2024
+ * Author: Lu Fei <lufei@uniontech.com>
+ */
+
+/*\
+ * [Description]
+ *
+ * Simple test on arch_prctl to set and get cpuid instruction of test thread.
+ */
+
+#include "tst_test.h"
+#include "tst_safe_stdio.h"
+#include "lapi/syscalls.h"
+#include <stdlib.h>
+#include <string.h>
+#ifdef HAVE_ASM_PRCTL_H
+#include <asm/prctl.h>
+
+static int arch_prctl_get(int code)
+{
+	return tst_syscall(__NR_arch_prctl, code, NULL);
+}
+
+static int arch_prctl_set(int code, unsigned long addr)
+{
+	return tst_syscall(__NR_arch_prctl, code, addr);
+}
+
+static bool tag;
+
+static void setup(void)
+{
+	FILE *f;
+	char flag_mid[] = " cpuid_fault ";
+	char flag_end[] = " cpuid_fault\n";
+	char *line = NULL;
+	size_t len = 0;
+
+	tag = false;
+
+	f = SAFE_FOPEN("/proc/cpuinfo", "r");
+
+	while (getline(&line, &len, f) != -1)
+		if (strncmp(line, "flags", strlen("flags")) == 0 &&
+				(strstr(line, flag_mid) != NULL ||
+				 strstr(line, flag_end) != NULL)) {
+			tag = true;
+			break;
+		}
+}
+
+static void run(unsigned int index)
+{
+	if (tag)
+		TST_EXP_PASS(arch_prctl_set(ARCH_SET_CPUID, index));
+	else
+		TST_EXP_FAIL(arch_prctl_set(ARCH_SET_CPUID, index), ENODEV);
+
+	// if cpu has cpuid_fault flag, ARCH_GET_CPUID returns what has been
+	// set: index, otherwise, returns default status: 1
+	int exp = tag ? index : 1;
+
+	TEST(arch_prctl_get(ARCH_GET_CPUID));
+	if (TST_RET == exp)
+		tst_res(TPASS, "get cpuid succeed.");
+	else
+		tst_res(TFAIL, "get wrong cpuid status");
+}
+
+static struct tst_test test = {
+	.test = run,
+	.setup = setup,
+	.tcnt = 2,
+	.min_kver = "4.12",
+	.supported_archs = (const char *const []){"x86_64", "x86", NULL}
+};
+
+#else /* HAVE_ASM_PRCTL_H */
+TST_TEST_TCONF("missing <asm/prctl.h>");
+#endif
-- 
2.39.3