From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756900AbcILHef (ORCPT ); Mon, 12 Sep 2016 03:34:35 -0400 Received: from mail-pf0-f194.google.com ([209.85.192.194]:35156 "EHLO mail-pf0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756798AbcILHeZ (ORCPT ); Mon, 12 Sep 2016 03:34:25 -0400 From: wei.guo.simon@gmail.com To: linuxppc-dev@lists.ozlabs.org Cc: Shuah Khan , Michael Ellerman , Cyril Bur , Chris Smart , Suraj Jitindar Singh , Michael Neuling , Anshuman Khandual , Simon Guo , Jack Miller , Rashmica Gupta , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH v14 05/15] selftests/powerpc: Add ptrace tests for GPR/FPR registers in TM Date: Mon, 12 Sep 2016 15:33:15 +0800 Message-Id: <1473665605-11890-6-git-send-email-wei.guo.simon@gmail.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1473665605-11890-1-git-send-email-wei.guo.simon@gmail.com> References: <1473665605-11890-1-git-send-email-wei.guo.simon@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Anshuman Khandual This patch adds ptrace interface test for GPR/FPR registers inside TM context. This adds ptrace interface based helper functions related to checkpointed GPR/FPR access. Signed-off-by: Anshuman Khandual Signed-off-by: Simon Guo --- tools/testing/selftests/powerpc/ptrace/Makefile | 3 +- .../selftests/powerpc/ptrace/ptrace-tm-gpr.c | 296 +++++++++++++++++++++ 2 files changed, 298 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-gpr.c diff --git a/tools/testing/selftests/powerpc/ptrace/Makefile b/tools/testing/selftests/powerpc/ptrace/Makefile index 31e8e33..170683a 100644 --- a/tools/testing/selftests/powerpc/ptrace/Makefile +++ b/tools/testing/selftests/powerpc/ptrace/Makefile @@ -1,8 +1,9 @@ -TEST_PROGS := ptrace-ebb ptrace-gpr +TEST_PROGS := ptrace-ebb ptrace-gpr ptrace-tm-gpr all: $(TEST_PROGS) CFLAGS += -m64 $(TEST_PROGS): ../harness.c ptrace.S ../utils.c ptrace.h ptrace-ebb: ../pmu/event.c ../pmu/lib.c ../pmu/ebb/ebb_handler.S ../pmu/ebb/busy_loop.S + clean: rm -f $(TEST_PROGS) *.o diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-tm-gpr.c b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-gpr.c new file mode 100644 index 0000000..8417d04 --- /dev/null +++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-gpr.c @@ -0,0 +1,296 @@ +/* + * Ptrace test for GPR/FPR registers in TM 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-gpr.h" + +/* Tracer and Tracee Shared Data */ +int shm_id; +volatile unsigned long *cptr, *pptr; + +float a = FPR_1; +float b = FPR_2; +float c = FPR_3; + +void tm_gpr(void) +{ + unsigned long gpr_buf[18]; + unsigned long result, texasr; + float fpr_buf[32]; + + printf("Starting the child\n"); + cptr = (unsigned long *)shmat(shm_id, NULL, 0); + +trans: + cptr[1] = 0; + asm __volatile__( + + "li 14, %[gpr_1];" + "li 15, %[gpr_1];" + "li 16, %[gpr_1];" + "li 17, %[gpr_1];" + "li 18, %[gpr_1];" + "li 19, %[gpr_1];" + "li 20, %[gpr_1];" + "li 21, %[gpr_1];" + "li 22, %[gpr_1];" + "li 23, %[gpr_1];" + "li 24, %[gpr_1];" + "li 25, %[gpr_1];" + "li 26, %[gpr_1];" + "li 27, %[gpr_1];" + "li 28, %[gpr_1];" + "li 29, %[gpr_1];" + "li 30, %[gpr_1];" + "li 31, %[gpr_1];" + + "lfs 0, 0(%[flt_1]);" + "lfs 1, 0(%[flt_1]);" + "lfs 2, 0(%[flt_1]);" + "lfs 3, 0(%[flt_1]);" + "lfs 4, 0(%[flt_1]);" + "lfs 5, 0(%[flt_1]);" + "lfs 6, 0(%[flt_1]);" + "lfs 7, 0(%[flt_1]);" + "lfs 8, 0(%[flt_1]);" + "lfs 9, 0(%[flt_1]);" + "lfs 10, 0(%[flt_1]);" + "lfs 11, 0(%[flt_1]);" + "lfs 12, 0(%[flt_1]);" + "lfs 13, 0(%[flt_1]);" + "lfs 14, 0(%[flt_1]);" + "lfs 15, 0(%[flt_1]);" + "lfs 16, 0(%[flt_1]);" + "lfs 17, 0(%[flt_1]);" + "lfs 18, 0(%[flt_1]);" + "lfs 19, 0(%[flt_1]);" + "lfs 20, 0(%[flt_1]);" + "lfs 21, 0(%[flt_1]);" + "lfs 22, 0(%[flt_1]);" + "lfs 23, 0(%[flt_1]);" + "lfs 24, 0(%[flt_1]);" + "lfs 25, 0(%[flt_1]);" + "lfs 26, 0(%[flt_1]);" + "lfs 27, 0(%[flt_1]);" + "lfs 28, 0(%[flt_1]);" + "lfs 29, 0(%[flt_1]);" + "lfs 30, 0(%[flt_1]);" + "lfs 31, 0(%[flt_1]);" + + "1: ;" + TBEGIN + "beq 2f;" + + "li 14, %[gpr_2];" + "li 15, %[gpr_2];" + "li 16, %[gpr_2];" + "li 17, %[gpr_2];" + "li 18, %[gpr_2];" + "li 19, %[gpr_2];" + "li 20, %[gpr_2];" + "li 21, %[gpr_2];" + "li 22, %[gpr_2];" + "li 23, %[gpr_2];" + "li 24, %[gpr_2];" + "li 25, %[gpr_2];" + "li 26, %[gpr_2];" + "li 27, %[gpr_2];" + "li 28, %[gpr_2];" + "li 29, %[gpr_2];" + "li 30, %[gpr_2];" + "li 31, %[gpr_2];" + + + "lfs 0, 0(%[flt_2]);" + "lfs 1, 0(%[flt_2]);" + "lfs 2, 0(%[flt_2]);" + "lfs 3, 0(%[flt_2]);" + "lfs 4, 0(%[flt_2]);" + "lfs 5, 0(%[flt_2]);" + "lfs 6, 0(%[flt_2]);" + "lfs 7, 0(%[flt_2]);" + "lfs 8, 0(%[flt_2]);" + "lfs 9, 0(%[flt_2]);" + "lfs 10, 0(%[flt_2]);" + "lfs 11, 0(%[flt_2]);" + "lfs 12, 0(%[flt_2]);" + "lfs 13, 0(%[flt_2]);" + "lfs 14, 0(%[flt_2]);" + "lfs 15, 0(%[flt_2]);" + "lfs 16, 0(%[flt_2]);" + "lfs 17, 0(%[flt_2]);" + "lfs 18, 0(%[flt_2]);" + "lfs 19, 0(%[flt_2]);" + "lfs 20, 0(%[flt_2]);" + "lfs 21, 0(%[flt_2]);" + "lfs 22, 0(%[flt_2]);" + "lfs 23, 0(%[flt_2]);" + "lfs 24, 0(%[flt_2]);" + "lfs 25, 0(%[flt_2]);" + "lfs 26, 0(%[flt_2]);" + "lfs 27, 0(%[flt_2]);" + "lfs 28, 0(%[flt_2]);" + "lfs 29, 0(%[flt_2]);" + "lfs 30, 0(%[flt_2]);" + "lfs 31, 0(%[flt_2]);" + TSUSPEND + "li 7, 1;" + "stw 7, 0(%[cptr1]);" + TRESUME + "b .;" + + TEND + "li 0, 0;" + "ori %[res], 0, 0;" + "b 3f;" + + /* Transaction abort handler */ + "2: ;" + "li 0, 1;" + "ori %[res], 0, 0;" + "mfspr %[texasr], %[sprn_texasr];" + + "3: ;" + : [res] "=r" (result), [texasr] "=r" (texasr) + : [gpr_1]"i"(GPR_1), [gpr_2]"i"(GPR_2), + [sprn_texasr] "i" (SPRN_TEXASR), [flt_1] "r" (&a), + [flt_2] "r" (&b), [cptr1] "r" (&cptr[1]) + : "memory", "r7", "r8", "r9", "r10", + "r11", "r12", "r13", "r14", "r15", "r16", + "r17", "r18", "r19", "r20", "r21", "r22", + "r23", "r24", "r25", "r26", "r27", "r28", + "r29", "r30", "r31" + ); + + if (result) { + if (!cptr[0]) + goto trans; + + shmdt((void *)cptr); + store_gpr(gpr_buf); + store_fpr(fpr_buf); + + if (validate_gpr(gpr_buf, GPR_3)) + exit(1); + + if (validate_fpr_float(fpr_buf, c)) + exit(1); + + exit(0); + } + shmdt((void *)cptr); + exit(1); +} + +int trace_tm_gpr(pid_t child) +{ + unsigned long gpr[18]; + unsigned long fpr[32]; + int ret; + + ret = start_trace(child); + if (ret) + return TEST_FAIL; + + ret = show_gpr(child, gpr); + if (ret) + return TEST_FAIL; + + ret = validate_gpr(gpr, GPR_2); + if (ret) + return TEST_FAIL; + + ret = show_fpr(child, fpr); + if (ret) + return TEST_FAIL; + + ret = validate_fpr(fpr, FPR_2_REP); + if (ret) + return TEST_FAIL; + + ret = show_ckpt_fpr(child, fpr); + if (ret) + return TEST_FAIL; + + ret = validate_fpr(fpr, FPR_1_REP); + if (ret) + return TEST_FAIL; + + ret = show_ckpt_gpr(child, gpr); + if (ret) + return TEST_FAIL; + + ret = validate_gpr(gpr, GPR_1); + if (ret) + return TEST_FAIL; + + ret = write_ckpt_gpr(child, GPR_3); + if (ret) + return TEST_FAIL; + + ret = write_ckpt_fpr(child, FPR_3_REP); + if (ret) + return TEST_FAIL; + + pptr[0] = 1; + ret = stop_trace(child); + if (ret) + return TEST_FAIL; + + return TEST_PASS; +} + +int ptrace_tm_gpr(void) +{ + pid_t pid; + int ret, status; + + SKIP_IF(!((long)get_auxv_entry(AT_HWCAP2) & PPC_FEATURE2_HTM)); + shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT); + pid = fork(); + if (pid < 0) { + perror("fork() failed"); + return TEST_FAIL; + } + if (pid == 0) + tm_gpr(); + + if (pid) { + pptr = (unsigned long *)shmat(shm_id, NULL, 0); + + while (!pptr[1]); + ret = trace_tm_gpr(pid); + if (ret) { + kill(pid, SIGTERM); + return TEST_FAIL; + } + + shmdt((void *)pptr); + + ret = wait(&status); + shmctl(shm_id, IPC_RMID, NULL); + 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_gpr, "ptrace_tm_gpr"); +} -- 1.8.3.1