Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 128 insertions, 0 deletions

diff --git a/tools/testing/selftests/powerpc/tm/tm-syscall.c b/tools/testing/selftests/powerpc/tm/tm-syscall.c
new file mode 100644
index 000000000..b763354c2
--- /dev/null
+++ b/tools/testing/selftests/powerpc/tm/tm-syscall.c
@@ -0,0 +1,128 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2015, Sam Bobroff, IBM Corp.
+ *
+ * Test the kernel's system call code to ensure that a system call
+ * made from within an active HTM transaction is aborted with the
+ * correct failure code.
+ * Conversely, ensure that a system call made from within a
+ * suspended transaction can succeed.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <asm/tm.h>
+#include <sys/time.h>
+#include <stdlib.h>
+
+#include "utils.h"
+#include "tm.h"
+
+#ifndef PPC_FEATURE2_SCV
+#define PPC_FEATURE2_SCV               0x00100000 /* scv syscall */
+#endif
+
+extern int getppid_tm_active(void);
+extern int getppid_tm_suspended(void);
+extern int getppid_scv_tm_active(void);
+extern int getppid_scv_tm_suspended(void);
+
+unsigned retries = 0;
+
+#define TEST_DURATION 10 /* seconds */
+
+pid_t getppid_tm(bool scv, bool suspend)
+{
+	int i;
+	pid_t pid;
+
+	for (i = 0; i < TM_RETRIES; i++) {
+		if (suspend) {
+			if (scv)
+				pid = getppid_scv_tm_suspended();
+			else
+				pid = getppid_tm_suspended();
+		} else {
+			if (scv)
+				pid = getppid_scv_tm_active();
+			else
+				pid = getppid_tm_active();
+		}
+
+		if (pid >= 0)
+			return pid;
+
+		if (failure_is_persistent()) {
+			if (failure_is_syscall())
+				return -1;
+
+			printf("Unexpected persistent transaction failure.\n");
+			printf("TEXASR 0x%016lx, TFIAR 0x%016lx.\n",
+			       __builtin_get_texasr(), __builtin_get_tfiar());
+			exit(-1);
+		}
+
+		retries++;
+	}
+
+	printf("Exceeded limit of %d temporary transaction failures.\n", TM_RETRIES);
+	printf("TEXASR 0x%016lx, TFIAR 0x%016lx.\n",
+	       __builtin_get_texasr(), __builtin_get_tfiar());
+
+	exit(-1);
+}
+
+int tm_syscall(void)
+{
+	unsigned count = 0;
+	struct timeval end, now;
+
+	SKIP_IF(!have_htm_nosc());
+	SKIP_IF(htm_is_synthetic());
+
+	setbuf(stdout, NULL);
+
+	printf("Testing transactional syscalls for %d seconds...\n", TEST_DURATION);
+
+	gettimeofday(&end, NULL);
+	now.tv_sec = TEST_DURATION;
+	now.tv_usec = 0;
+	timeradd(&end, &now, &end);
+
+	for (count = 0; timercmp(&now, &end, <); count++) {
+		/*
+		 * Test a syscall within a suspended transaction and verify
+		 * that it succeeds.
+		 */
+		FAIL_IF(getppid_tm(false, true) == -1); /* Should succeed. */
+
+		/*
+		 * Test a syscall within an active transaction and verify that
+		 * it fails with the correct failure code.
+		 */
+		FAIL_IF(getppid_tm(false, false) != -1);  /* Should fail... */
+		FAIL_IF(!failure_is_persistent()); /* ...persistently... */
+		FAIL_IF(!failure_is_syscall());    /* ...with code syscall. */
+
+		/* Now do it all again with scv if it is available. */
+		if (have_hwcap2(PPC_FEATURE2_SCV)) {
+			FAIL_IF(getppid_tm(true, true) == -1); /* Should succeed. */
+			FAIL_IF(getppid_tm(true, false) != -1);  /* Should fail... */
+			FAIL_IF(!failure_is_persistent()); /* ...persistently... */
+			FAIL_IF(!failure_is_syscall());    /* ...with code syscall. */
+		}
+
+		gettimeofday(&now, 0);
+	}
+
+	printf("%d active and suspended transactions behaved correctly.\n", count);
+	printf("(There were %d transaction retries.)\n", retries);
+
+	return 0;
+}
+
+int main(void)
+{
+	return test_harness(tm_syscall, "tm_syscall");
+}