Just testing that things are behaving the way they should. Uses more
threads than cpus to see if the following values persist with context
switching:
- the FS (failure summary) flag in TEXASR
- TFIAR and TFHAR
Signed-off-by: Rashmica Gupta <rashm...@gmail.com>
---
tools/testing/selftests/powerpc/tm/.gitignore | 1 +
tools/testing/selftests/powerpc/tm/Makefile | 6 +-
tools/testing/selftests/powerpc/tm/tm-tmspr.c | 154 ++++++++++++++++++++++++++
3 files changed, 159 insertions(+), 2 deletions(-)
create mode 100644 tools/testing/selftests/powerpc/tm/tm-tmspr.c
diff --git a/tools/testing/selftests/powerpc/tm/.gitignore
b/tools/testing/selftests/powerpc/tm/.gitignore
index c4667790d01d..42a6467afe93 100644
--- a/tools/testing/selftests/powerpc/tm/.gitignore
+++ b/tools/testing/selftests/powerpc/tm/.gitignore
@@ -3,3 +3,4 @@ tm-syscall
tm-signal-msr-resv
tm-signal-stack
tm-vmxcopy
+tm-tmspr
diff --git a/tools/testing/selftests/powerpc/tm/Makefile
b/tools/testing/selftests/powerpc/tm/Makefile
index d013447fb6d9..21435399e8e9 100644
--- a/tools/testing/selftests/powerpc/tm/Makefile
+++ b/tools/testing/selftests/powerpc/tm/Makefile
@@ -1,11 +1,13 @@
-TEST_PROGS := tm-resched-dscr tm-syscall tm-signal-msr-resv tm-signal-stack
tm-vmxcopy
+TEST_PROGS := tm-resched-dscr tm-syscall tm-signal-msr-resv tm-signal-stack
tm-vmxcopy tm-tmspr
all: $(TEST_PROGS)
$(TEST_PROGS): ../harness.c ../utils.c
tm-syscall: tm-syscall-asm.S
- tm-syscall: CFLAGS += -mhtm -I../../../../../usr/include
+tm-syscall: CFLAGS += -mhtm -I../../../../../usr/include
+
+tm-tmspr: CFLAGS += -pthread
include ../../lib.mk
diff --git a/tools/testing/selftests/powerpc/tm/tm-tmspr.c
b/tools/testing/selftests/powerpc/tm/tm-tmspr.c
new file mode 100644
index 000000000000..6b317b8d7067
--- /dev/null
+++ b/tools/testing/selftests/powerpc/tm/tm-tmspr.c
@@ -0,0 +1,154 @@
+/*
+ * Copyright 2015, Michael Neuling, IBM Corp.
+ * Licensed under GPLv2.
+ *
+ * Original: Michael Neuling 3/4/2014
+ * Modified: Rashmica Gupta 8/12/2015
+ *
+ * Check if any of the Transaction Memory SPRs get corrupted.
+ * - TFIAR - stores address of location of transaction failure
+ * - TFHAR - stores address of software failure handler (if transaction
+ * fails)
+ * - TEXASR - lots of info about the transacion(s)
+ *
+ * (1) create more threads than cpus
+ * (2) in each thread:
+ * (a) set TFIAR and TFHAR a unique value
+ * (b) loop for awhile, continually checking to see if
+ * either register has been corrupted.
+ *
+ * (3) Loop:
+ * (a) begin transaction
+ * (b) abort transaction
+ * (c) check TEXASR to see if FS has been corrupted
+ *
+ */
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <pthread.h>
+#include <string.h>
+
+#include "utils.h"
+
+
+#define __stringify_1(x) #x
+#define __stringify(x) __stringify_1(x)
+#define mfspr(rn) ({unsigned long rval; \
+ asm volatile("mfspr %0," __stringify(rn) \
+ : "=r" (rval)); rval; })
+#define mtspr(rn, v) asm volatile("mtspr " __stringify(rn) ",%0" : \
+ : "r" ((unsigned long)(v)) \
+ : "memory")
+#define SPRN_TEXASR 0x82
+#define TEXASR_FS 0x08000000
+#define SPRN_TFIAR 0x81 /* Transaction Failure Inst Addr */
+#define SPRN_TFHAR 0x80 /* Transaction Failure Handler Addr */
+
+int num_loops = 10000;
+int passed = 1;
+
+void tfiar_tfhar(void *in)
+{
+ int i, cpu;
+ unsigned long tfhar, tfhar_rd, tfiar, tfiar_rd;
+ cpu_set_t cpuset;
+
+ CPU_ZERO(&cpuset);
+ cpu = (unsigned long)in >> 1;
+ CPU_SET(cpu, &cpuset);
+ sched_setaffinity(0, sizeof(cpuset), &cpuset);
+
+ /* TFIAR: Last bit has to be high so userspace can read register */
+ tfiar = ((unsigned long)in) + 1;
+ tfiar += 2;
+ mtspr(SPRN_TFIAR, tfiar);
+
+ /* TFHAR: Last two bits are reserved */
+ tfhar = ((unsigned long)in);
+ tfhar &= ~0x3UL;
+ tfhar += 4;
+ mtspr(SPRN_TFHAR, tfhar);
+
+ for (i = 0; i < num_loops; i++) {
+ tfhar_rd = mfspr(SPRN_TFHAR);
+ tfiar_rd = mfspr(SPRN_TFIAR);
+ if ( (tfhar != tfhar_rd) || (tfiar != tfiar_rd) ) {
+ passed = 0;
+ return;
+ }
+ }
+ return;
+}
+
+void texasr(void *in)
+{
+ unsigned long i;
+ uint64_t result = 0;
+
+ for (i = 0; i < num_loops; i++) {
+ asm __volatile__(
+ "tbegin.;"
+ "beq 3f ;"
+ "tabort. 0 ;"
+ "tend.;"
+
+ /* Abort handler */
+ "3: ;"
+ ::: "memory");
+
+ /* Check the TEXASR */
+ result = mfspr(SPRN_TEXASR);
+ if ((result & TEXASR_FS) == 0) {
+ passed = 0;
+ return;
+ }
+ }
+ return;
+}
+
+int test_tmspr()
+{
+ pthread_t thread;
+ int thread_num;
+ unsigned long i;
+
+ /* To cause some context switching */
+ thread_num = 10 * sysconf(_SC_NPROCESSORS_ONLN);
+
+ /* Test TFIAR and TFHAR */
+ for (i = 0 ; i < thread_num ; i += 2){
+ if (pthread_create(&thread, NULL, (void*)tfiar_tfhar, (void
*)i))
+ return EXIT_FAILURE;
+ }
+ if (pthread_join(thread, NULL) != 0)
+ return EXIT_FAILURE;
+
+ /* Test TEXASR */
+ for (i = 0 ; i < thread_num ; i++){
+ if (pthread_create(&thread, NULL, (void*)texasr, (void *)i))
+ return EXIT_FAILURE;
+ }
+ if (pthread_join(thread, NULL) != 0)
+ return EXIT_FAILURE;
+
+ if (passed)
+ return 0;
+ else
+ return 1;
+}
+
+int main(int argc, char *argv[])
+{
+ if (argc > 1) {
+ if (strcmp(argv[1], "-h") == 0) {
+ printf("Syntax:\t [<num loops>]\n");
+ return 0;
+ } else {
+ num_loops = atoi(argv[1]);
+ }
+ }
+ return test_harness(test_tmspr, "tm_tmspr");
+}
--
2.5.0
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