From patchwork Tue May 19 15:08:23 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 473948 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [103.22.144.68]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id B266E140D4E for ; Wed, 20 May 2015 01:14:27 +1000 (AEST) Received: from ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 8040D1A1AB2 for ; Wed, 20 May 2015 01:14:27 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org 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 7B6B51A0671 for ; Wed, 20 May 2015 01:08:46 +1000 (AEST) Received: by ozlabs.org (Postfix) id 43815140D4F; Wed, 20 May 2015 01:08:46 +1000 (AEST) Delivered-To: linuxppc-dev@ozlabs.org Received: from e28smtp03.in.ibm.com (e28smtp03.in.ibm.com [122.248.162.3]) (using TLSv1 with cipher CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id A8179140D58 for ; Wed, 20 May 2015 01:08:45 +1000 (AEST) Received: from /spool/local by e28smtp03.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Tue, 19 May 2015 20:38:42 +0530 Received: from d28relay02.in.ibm.com (d28relay02.in.ibm.com [9.184.220.59]) by d28dlp02.in.ibm.com (Postfix) with ESMTP id 385083940048 for ; Tue, 19 May 2015 20:38:42 +0530 (IST) Received: from d28av04.in.ibm.com (d28av04.in.ibm.com [9.184.220.66]) by d28relay02.in.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t4JF8cQg53805268 for ; Tue, 19 May 2015 20:38:39 +0530 Received: from d28av04.in.ibm.com (localhost [127.0.0.1]) by d28av04.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t4JF8Yp4028984 for ; Tue, 19 May 2015 20:38:36 +0530 Received: from localhost.in.ibm.com ([9.124.158.205]) by d28av04.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id t4JF8OHl027580; Tue, 19 May 2015 20:38:33 +0530 From: Anshuman Khandual To: linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org Subject: [PATCH V8 27/28] selftests, powerpc: Add ptrace tests for TM SPR registers Date: Tue, 19 May 2015 20:38:23 +0530 Message-Id: <1432048104-4695-28-git-send-email-khandual@linux.vnet.ibm.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1432048104-4695-1-git-send-email-khandual@linux.vnet.ibm.com> References: <1432048104-4695-1-git-send-email-khandual@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15051915-0009-0000-0000-0000058C1DCF Cc: shuahkh@osg.samsung.com, mikey@neuling.org, james.hogan@imgtec.com, avagin@openvz.org, Paul.Clothier@imgtec.com, peterz@infradead.org, palves@redhat.com, nacc@linux.vnet.ibm.com, emachado@linux.vnet.ibm.com, oleg@redhat.com, davem@davemloft.net, dhowells@redhat.com, Ulrich.Weigand@de.ibm.com, kirjanov@gmail.com, davej@redhat.com, akpm@linux-foundation.org, sukadev@linux.vnet.ibm.com, tglx@linutronix.de, sam.bobroff@au1.ibm.com X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" This patch adds ptrace interface test for TM SPR registers. This also adds ptrace interface based helper functions related to TM SPR registers access. Signed-off-by: Anshuman Khandual --- tools/testing/selftests/powerpc/ptrace/Makefile | 2 +- .../selftests/powerpc/ptrace/ptrace-tm-spr.c | 156 +++++++++++++++++++++ tools/testing/selftests/powerpc/ptrace/ptrace.h | 35 +++++ 3 files changed, 192 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-spr.c diff --git a/tools/testing/selftests/powerpc/ptrace/Makefile b/tools/testing/selftests/powerpc/ptrace/Makefile index ea57351..a46a0e5 100644 --- a/tools/testing/selftests/powerpc/ptrace/Makefile +++ b/tools/testing/selftests/powerpc/ptrace/Makefile @@ -1,6 +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-tm-spd-vsx +ptrace-tm-spd-vsx ptrace-tm-spr all: $(TEST_PROGS) diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spr.c b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spr.c new file mode 100644 index 0000000..36b9722 --- /dev/null +++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spr.c @@ -0,0 +1,156 @@ +/* + * Ptrace test TM SPR registers + * + * Copyright 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" + +/* Tracee and tracer shared data */ +struct shared { + int flag; + struct tm_spr_regs regs; +}; +unsigned long tfhar; + +int shm_id; +volatile struct shared *cptr, *pptr; + +#define TM_SCHED 0xde0000018c000001 +#define TM_KVM_SCHED 0xe0000001ac000001 + +int validate_tm_spr(struct tm_spr_regs *regs) +{ + if (regs->tm_tfhar != (tfhar - 32)) + return TEST_FAIL; + + if ((regs->tm_texasr != TM_SCHED) && (regs->tm_texasr != TM_KVM_SCHED)) + return TEST_FAIL; + + if ((regs->tm_texasr == TM_KVM_SCHED) && (regs->tm_tfiar != 0)) + return TEST_FAIL; + + return TEST_PASS; +} + +void tm_spr(void) +{ + unsigned long result, texasr; + int ret; + + cptr = (struct shared *)shmat(shm_id, NULL, 0); +trans: + asm __volatile__( + "1: ;" + TBEGIN + "beq 2f;" + + "b .;" + + TEND + "li 0, 0;" + "ori %[res], 0, 0;" + "b 3f;" + + "2: ;" + "mflr 31;" + "bl 4f;" /* $ = TFHAR + 2 */ + "4: ;" + "mflr %[tfhar];" + "mtlr 31;" + + "li 0, 1;" + "ori %[res], 0, 0;" + "mfspr %[texasr], %[sprn_texasr];" + + "3: ;" + : [tfhar] "=r" (tfhar), [res] "=r" (result), [texasr] "=r" (texasr) + : [sprn_texasr] "i" (SPRN_TEXASR) + : "memory", "r0", "r1", "r2", "r3", "r4", "r8", "r9", "r10", "r11" + ); + + if (result) { + if (!cptr->flag) + goto trans; + + ret = validate_tm_spr((struct tm_spr_regs *)&cptr->regs); + shmdt((void *)cptr); + if (ret) + exit(1); + exit(0); + } + shmdt((void *)cptr); + exit(1); +} + +int trace_tm_spr(pid_t child) +{ + int ret; + + sleep(1); + ret = start_trace(child); + if (ret) + return TEST_FAIL; + + ret = show_tm_spr(child, (struct tm_spr_regs *)&pptr->regs); + if (ret) + return TEST_FAIL; + + printf("TFHAR: %lx TEXASR: %lx TFIAR: %lx\n", pptr->regs.tm_tfhar, + pptr->regs.tm_texasr, pptr->regs.tm_tfiar); + + ret = stop_trace(child); + if (ret) + return TEST_FAIL; + + return TEST_PASS; +} + +int ptrace_tm_spr(void) +{ + pid_t pid; + int ret, status; + + shm_id = shmget(IPC_PRIVATE, sizeof(struct shared), 0777|IPC_CREAT); + pid = fork(); + if (pid < 0) { + perror("fork() failed"); + return TEST_FAIL; + } + + if (pid == 0) + tm_spr(); + + if (pid) { + pptr = (struct shared *)shmat(shm_id, NULL, 0); + ret = trace_tm_spr(pid); + if (ret) { + kill(pid, SIGKILL); + return TEST_FAIL; + } + + pptr->flag = 1; + 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_spr, "ptrace_tm_spr"); +} diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace.h b/tools/testing/selftests/powerpc/ptrace/ptrace.h index 86fef91..812261a 100644 --- a/tools/testing/selftests/powerpc/ptrace/ptrace.h +++ b/tools/testing/selftests/powerpc/ptrace/ptrace.h @@ -82,6 +82,11 @@ struct fpr_regs { unsigned long fpscr; }; +struct tm_spr_regs { + unsigned long tm_tfhar; + unsigned long tm_texasr; + unsigned long tm_tfiar; +}; /* Basic ptrace operations */ int start_trace(pid_t child) @@ -662,6 +667,36 @@ int write_vsx_ckpt(pid_t child, unsigned long *vsx) return TEST_PASS; } +/* TM SPR */ +int show_tm_spr(pid_t child, struct tm_spr_regs *out) +{ + struct tm_spr_regs *regs; + struct iovec iov; + int ret; + + regs = (struct tm_spr_regs *) malloc(sizeof(struct tm_spr_regs)); + if (!regs) { + perror("malloc() failed"); + return TEST_FAIL; + } + + iov.iov_base = (u64 *) regs; + iov.iov_len = sizeof(struct tm_spr_regs); + + ret = ptrace(PTRACE_GETREGSET, child, NT_PPC_TM_SPR, &iov); + if (ret) { + perror("ptrace(PTRACE_GETREGSET) failed"); + return TEST_FAIL; + } + + if (out) + memcpy(out, regs, sizeof(struct tm_spr_regs)); + + return TEST_PASS; +} + + + /* Analyse TEXASR after TM failure */ inline unsigned long get_tfiar(void) {