From: Anshuman Khandual <khandual@xxxxxxxxxxxxxxxxxx>
This patch adds ptrace interface test for VSX, VMX registers
inside suspended TM context.
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Shuah Khan <shuahkh@xxxxxxxxxxxxxxx>
Cc: Anton Blanchard <anton@xxxxxxxxx>
Cc: Cyril Bur <cyrilbur@xxxxxxxxx>
Cc: Anshuman Khandual <khandual@xxxxxxxxxxxxxxxxxx>
Cc: Simon Guo <wei.guo.simon@xxxxxxxxx>
Cc: Ulrich Weigand <ulrich.weigand@xxxxxxxxxx>
Cc: Michael Neuling <mikey@xxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Rashmica Gupta <rashmicy@xxxxxxxxx>
Cc: Khem Raj <raj.khem@xxxxxxxxx>
Cc: Jessica Yu <jeyu@xxxxxxxxxx>
Cc: Jiri Kosina <jkosina@xxxxxxx>
Cc: Miroslav Benes <mbenes@xxxxxxx>
Cc: Suraj Jitindar Singh <sjitindarsingh@xxxxxxxxx>
Cc: Chris Smart <chris@xxxxxxxxxxxxx>
Cc: linuxppc-dev@xxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: linux-kselftest@xxxxxxxxxxxxxxx
Signed-off-by: Anshuman Khandual <khandual@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Simon Guo <wei.guo.simon@xxxxxxxxx>
---
tools/testing/selftests/powerpc/ptrace/Makefile | 3 +-
.../selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c | 218 +++++++++++++++++++++
2 files changed, 220 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c
diff --git a/tools/testing/selftests/powerpc/ptrace/Makefile b/tools/testing/selftests/powerpc/ptrace/Makefile
index 1b07649..797840a 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-tm-vsx
+ptrace-tar ptrace-tm-tar ptrace-tm-spd-tar ptrace-vsx ptrace-tm-vsx \
+ptrace-tm-spd-vsx
all: $(TEST_PROGS)
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c
new file mode 100644
index 0000000..8a1a74b
--- /dev/null
+++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c
@@ -0,0 +1,218 @@
+/*
+ * Ptrace test for VMX/VSX registers in the TM Suspend context
+ *
+ * Copyright (C) 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;
+
+void loadvsx(void *p, int tmp);
+void storevsx(void *p, int tmp);
+
+unsigned long fp_load[VEC_MAX];
+unsigned long fp_load_new[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_new(void)
+{
+ loadvsx(fp_load_new, 0);
+}
+
+__attribute__((used)) void load_vsx_ckpt(void)
+{
+ loadvsx(fp_load_ckpt, 0);
+}
+
+__attribute__((used)) void wait_parent(void)
+{
+ cptr[2] = 1;
+ while (!cptr[1]);
+}
+
+void tm_spd_vsx(void)
+{
+ unsigned long result, texasr;
+ int ret;
+
+ cptr = (int *)shmat(shm_id, NULL, 0);
+
+trans:
+ cptr[2] = 0;
+ asm __volatile__(
+ "bl load_vsx_ckpt;"
+
+ "1: ;"
+ TBEGIN
+ "beq 2f;"
+
+ "bl load_vsx_new;"
+ TSUSPEND
+ "bl load_vsx;"
+ "bl wait_parent;"
+ TRESUME
+
+ 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_spd_vsx(pid_t child)
+{
+ unsigned long vsx[VSX_MAX];
+ unsigned long vmx[VMX_MAX + 2][2];
+ int ret;
+
+ 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;
+
+ pptr[0] = 1;
+ pptr[1] = 1;
+ ret = stop_trace(child);
+ if (ret)
+ return TEST_FAIL;
+
+ return TEST_PASS;
+}
+
+int ptrace_tm_spd_vsx(void)
+{
+ pid_t pid;
+ int ret, status, i;
+
+ SKIP_IF(!((long)get_auxv_entry(AT_HWCAP2) & PPC_FEATURE2_HTM));
+ shm_id = shmget(IPC_PRIVATE, sizeof(int) * 3, 0777|IPC_CREAT);
+
+ for (i = 0; i < 128; i++) {
+ fp_load[i] = 1 + rand();
+ fp_load_new[i] = 1 + 2 * rand();
+ fp_load_ckpt[i] = 1 + 3 * rand();
+ fp_load_ckpt_new[i] = 1 + 4 * rand();
+ }
+
+ pid = fork();
+ if (pid < 0) {
+ perror("fork() failed");
+ return TEST_FAIL;
+ }
+
+ if (pid == 0)
+ tm_spd_vsx();
+
+ if (pid) {
+ pptr = (int *)shmat(shm_id, NULL, 0);
+ while (!pptr[2]);
+
+ ret = trace_tm_spd_vsx(pid);
+ if (ret) {
+ kill(pid, SIGKILL);
+ return TEST_FAIL;
+ }
+
+ 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_spd_vsx, "ptrace_tm_spd_vsx");
+}
--
1.8.3.1
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