From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.org (ozlabs.org [103.22.144.67]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 6FDF61A0244 for ; Fri, 9 Oct 2015 01:50:55 +1100 (AEDT) Received: from e23smtp07.au.ibm.com (e23smtp07.au.ibm.com [202.81.31.140]) (using TLSv1 with cipher CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 98597140D93 for ; Fri, 9 Oct 2015 01:50:54 +1100 (AEDT) Received: from /spool/local by e23smtp07.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 9 Oct 2015 00:50:54 +1000 Received: from d23relay09.au.ibm.com (d23relay09.au.ibm.com [9.185.63.181]) by d23dlp02.au.ibm.com (Postfix) with ESMTP id 7990E2BB0052 for ; Fri, 9 Oct 2015 01:50:51 +1100 (EST) Received: from d23av01.au.ibm.com (d23av01.au.ibm.com [9.190.234.96]) by d23relay09.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t98EohJf36569248 for ; Fri, 9 Oct 2015 01:50:51 +1100 Received: from d23av01.au.ibm.com (localhost [127.0.0.1]) by d23av01.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t98EoGEU008752 for ; Fri, 9 Oct 2015 01:50:18 +1100 From: Anshuman Khandual To: linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org Cc: peterz@infradead.org, akpm@linux-foundation.org, tglx@linutronix.de, james.hogan@imgtec.com, avagin@openvz.org, Paul.Clothier@imgtec.com, palves@redhat.com, oleg@redhat.com, dhowells@redhat.com, davej@redhat.com, davem@davemloft.net, mikey@neuling.org, benh@kernel.crashing.org, sukadev@linux.vnet.ibm.com, mpe@ellerman.id.au, sam.bobroff@au1.ibm.com, kirjanov@gmail.com, shuahkh@osg.samsung.com, Ulrich.Weigand@de.ibm.com, emachado@linux.vnet.ibm.com Subject: [PATCH V9 22/28] selftests, powerpc: Add ptrace tests for TAR, PPR, DSCR in TM Date: Thu, 8 Oct 2015 20:17:43 +0530 Message-Id: <1444315669-23487-23-git-send-email-khandual@linux.vnet.ibm.com> In-Reply-To: <1444315669-23487-1-git-send-email-khandual@linux.vnet.ibm.com> References: <1444315669-23487-1-git-send-email-khandual@linux.vnet.ibm.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This patch adds ptrace interface test for TAR, PPR, DSCR registers inside TM context. This also adds ptrace interface based helper functions related to checkpointed TAR, PPR, DSCR register access. Signed-off-by: Anshuman Khandual --- tools/testing/selftests/powerpc/ptrace/Makefile | 2 +- .../selftests/powerpc/ptrace/ptrace-tm-tar.c | 170 +++++++++++++++++++++ 2 files changed, 171 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-tar.c diff --git a/tools/testing/selftests/powerpc/ptrace/Makefile b/tools/testing/selftests/powerpc/ptrace/Makefile index 28d4465..a5d177b 100644 --- a/tools/testing/selftests/powerpc/ptrace/Makefile +++ b/tools/testing/selftests/powerpc/ptrace/Makefile @@ -1,5 +1,5 @@ TEST_PROGS := ptrace-ebb ptrace-gpr ptrace-tm-gpr ptrace-tm-spd-gpr \ -ptrace-tar +ptrace-tar ptrace-tm-tar all: $(TEST_PROGS) diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-tm-tar.c b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-tar.c new file mode 100644 index 0000000..45b6fa3 --- /dev/null +++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-tar.c @@ -0,0 +1,170 @@ +/* + * Ptrace test for TAR, PPR, DSCR registers in the 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-tar.h" + +int shm_id; +volatile int *cptr, *pptr; + + +void tm_tar(void) +{ + unsigned long result, texasr; + unsigned long regs[3]; + int ret; + + cptr = (int *)shmat(shm_id, NULL, 0); +trans: + asm __volatile__( + "li 4, %[tar_1];" + "mtspr %[sprn_tar], 4;" /* TAR_1 */ + "li 4, %[dscr_1];" + "mtspr %[sprn_dscr], 4;" /* DSCR_1 */ + "or 31,31,31;" /* PPR_1*/ + + "1: ;" + TBEGIN + "beq 2f;" + + "li 4, %[tar_2];" + "mtspr %[sprn_tar], 4;" /* TAR_2 */ + "li 4, %[dscr_2];" + "mtspr %[sprn_dscr], 4;" /* DSCR_2 */ + "or 1,1,1;" /* PPR_2 */ + TSUSPEND + 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) + :[sprn_dscr]"i"(SPRN_DSCR), [sprn_tar]"i"(SPRN_TAR), [sprn_ppr]"i"(SPRN_PPR), [sprn_texasr]"i"(SPRN_TEXASR), + [tar_1]"i"(TAR_1), [dscr_1]"i"(DSCR_1), + [tar_2]"i"(TAR_2), [dscr_2]"i"(DSCR_2) + : "memory", "r0", "r1", "r3", "r4", "r5", "r6" + ); + + /* TM failed, analyse */ + if (result) { + if (!cptr[0]) + goto trans; + + regs[0] = mfspr(SPRN_TAR); + regs[1] = mfspr(SPRN_PPR); + regs[2] = mfspr(SPRN_DSCR); + + shmdt(&cptr); + printf("%-30s TAR: %lu PPR: %lx DSCR: %lu\n", user_read, regs[0], regs[1], regs[2]); + + ret = validate_tar_registers(regs, TAR_4, PPR_4, DSCR_4); + if (ret) + exit(1); + exit(0); + } + shmdt(&cptr); + exit(1); +} + +int trace_tm_tar(pid_t child) +{ + unsigned long regs[3]; + int ret; + + sleep(1); + ret = start_trace(child); + if (ret) + return TEST_FAIL; + + ret = show_tar_registers(child, regs); + if (ret) + return TEST_FAIL; + + printf("%-30s TAR: %lu PPR: %lx DSCR: %lu\n", ptrace_read_running, regs[0], regs[1], regs[2]); + + ret = validate_tar_registers(regs, TAR_2, PPR_2, DSCR_2); + if (ret) + return TEST_FAIL; + + ret = show_tm_checkpointed_state(child, regs); + if (ret) + return TEST_FAIL; + + printf("%-30s TAR: %lu PPR: %lx DSCR: %lu\n", ptrace_read_ckpt, regs[0], regs[1], regs[2]); + + ret = validate_tar_registers(regs, TAR_1, PPR_1, DSCR_1); + if (ret) + return TEST_FAIL; + + ret = write_ckpt_tar_registers(child, TAR_4, PPR_4, DSCR_4); + if (ret) + return TEST_FAIL; + + printf("%-30s TAR: %u PPR: %lx DSCR: %u\n", ptrace_write_ckpt, TAR_4, PPR_4, DSCR_4); + + ret = stop_trace(child); + if (ret) + return TEST_FAIL; + return TEST_PASS; +} + +int ptrace_tm_tar(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) * 1, 0777|IPC_CREAT); + pid = fork(); + if (pid == 0) + tm_tar(); + + pptr = (int *)shmat(shm_id, NULL, 0); + pptr[0] = 0; + + if (pid) { + ret = trace_tm_tar(pid); + if (ret) { + kill(pid, SIGTERM); + return TEST_FAIL; + } + pptr[0] = 1; + shmdt(&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_tar, "ptrace_tm_tar"); +} -- 2.1.0