From patchwork Wed Apr 7 05:49:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ravi Bangoria X-Patchwork-Id: 417043 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 82B1EC433ED for ; Wed, 7 Apr 2021 05:50:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 52F48613C0 for ; Wed, 7 Apr 2021 05:50:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229558AbhDGFuI (ORCPT ); Wed, 7 Apr 2021 01:50:08 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:8954 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243610AbhDGFuH (ORCPT ); Wed, 7 Apr 2021 01:50:07 -0400 Received: from pps.filterd (m0098409.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 1375XMPT149046; Wed, 7 Apr 2021 01:49:50 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=Ayh2LqRk/4w+LeZhGHA8zGnXcCMLoo/GkATHEyBk5yE=; b=j33zEq4rDAoCNTfJvWJZU85Q7NzYncHtc/C3eQbIdhb9czVSIZsdhYSjUe/eetVr/c9Y ai1FCSerhflQo3DtaCHKkfIsFISq7t4y4Xsy62kWNvo4yeBYh58GWY4rQgQn1LUrVrKm x9zrDMULdn/VDcOt1ocRBYMqVYv8Lf8FDXKh1i5OtnaNZXb8/m2PI+nWQ86QCWr9XDAN gtjNgNG6n0PMvl4BSFwzlRnNlxqpnuOVZDkbMdy5lm8cDeKafvaTjrDIovjQqISoo4s4 fslazcM/EJhMGFnlj1/GOL4fjJgShbIfDyKqFXA6qRLZnaVFrGPZkv6CV5v9xKhJ7pq+ Yg== Received: from ppma06ams.nl.ibm.com (66.31.33a9.ip4.static.sl-reverse.com [169.51.49.102]) by mx0a-001b2d01.pphosted.com with ESMTP id 37rw6jwmuv-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 07 Apr 2021 01:49:50 -0400 Received: from pps.filterd (ppma06ams.nl.ibm.com [127.0.0.1]) by ppma06ams.nl.ibm.com (8.16.0.43/8.16.0.43) with SMTP id 1375lDoH025812; Wed, 7 Apr 2021 05:49:48 GMT Received: from b06cxnps4075.portsmouth.uk.ibm.com (d06relay12.portsmouth.uk.ibm.com [9.149.109.197]) by ppma06ams.nl.ibm.com with ESMTP id 37rvbw8cba-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 07 Apr 2021 05:49:48 +0000 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 1375nkvL38666676 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 7 Apr 2021 05:49:46 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 354B3A404D; Wed, 7 Apr 2021 05:49:46 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DE4CFA4040; Wed, 7 Apr 2021 05:49:43 +0000 (GMT) Received: from bangoria.ibmuc.com (unknown [9.199.44.100]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 7 Apr 2021 05:49:43 +0000 (GMT) From: Ravi Bangoria To: mpe@ellerman.id.au Cc: ravi.bangoria@linux.ibm.com, shuah@kernel.org, mikey@neuling.org, linuxppc-dev@lists.ozlabs.org, linux-kselftest@vger.kernel.org Subject: [PATCH v2 1/4] powerpc/selftests/ptrace-hwbreak: Add testcases for 2nd DAWR Date: Wed, 7 Apr 2021 11:19:35 +0530 Message-Id: <20210407054938.312857-2-ravi.bangoria@linux.ibm.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210407054938.312857-1-ravi.bangoria@linux.ibm.com> References: <20210407054938.312857-1-ravi.bangoria@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: SKfVz43So34kkN1CMpb7iQioRi88gXdz X-Proofpoint-ORIG-GUID: SKfVz43So34kkN1CMpb7iQioRi88gXdz X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369, 18.0.761 definitions=2021-04-07_03:2021-04-06,2021-04-07 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 impostorscore=0 bulkscore=0 priorityscore=1501 mlxscore=0 suspectscore=0 mlxlogscore=999 clxscore=1015 phishscore=0 spamscore=0 malwarescore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104060000 definitions=main-2104070039 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Add selftests to test multiple active DAWRs with ptrace interface. Sample o/p: $ ./ptrace-hwbreak ... PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DW ALIGNED, WO, len: 6: Ok PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DW UNALIGNED, RO, len: 6: Ok PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DAWR Overlap, WO, len: 6: Ok PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DAWR Overlap, RO, len: 6: Ok Signed-off-by: Ravi Bangoria Reviewed-by: Daniel Axtens --- .../selftests/powerpc/ptrace/ptrace-hwbreak.c | 79 +++++++++++++++++++ 1 file changed, 79 insertions(+) diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-hwbreak.c b/tools/testing/selftests/powerpc/ptrace/ptrace-hwbreak.c index 2e0d86e0687e..a0635a3819aa 100644 --- a/tools/testing/selftests/powerpc/ptrace/ptrace-hwbreak.c +++ b/tools/testing/selftests/powerpc/ptrace/ptrace-hwbreak.c @@ -194,6 +194,18 @@ static void test_workload(void) big_var[rand() % DAWR_MAX_LEN] = 'a'; else cvar = big_var[rand() % DAWR_MAX_LEN]; + + /* PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DW ALIGNED, WO test */ + gstruct.a[rand() % A_LEN] = 'a'; + + /* PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DW UNALIGNED, RO test */ + cvar = gstruct.b[rand() % B_LEN]; + + /* PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DAWR Overlap, WO test */ + gstruct.a[rand() % A_LEN] = 'a'; + + /* PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DAWR Overlap, RO test */ + cvar = gstruct.a[rand() % A_LEN]; } static void check_success(pid_t child_pid, const char *name, const char *type, @@ -417,6 +429,69 @@ static void test_sethwdebug_range_aligned(pid_t child_pid) ptrace_delhwdebug(child_pid, wh); } +static void test_multi_sethwdebug_range(pid_t child_pid) +{ + struct ppc_hw_breakpoint info1, info2; + unsigned long wp_addr1, wp_addr2; + char *name1 = "PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DW ALIGNED"; + char *name2 = "PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DW UNALIGNED"; + int len1, len2; + int wh1, wh2; + + wp_addr1 = (unsigned long)&gstruct.a; + wp_addr2 = (unsigned long)&gstruct.b; + len1 = A_LEN; + len2 = B_LEN; + get_ppc_hw_breakpoint(&info1, PPC_BREAKPOINT_TRIGGER_WRITE, wp_addr1, len1); + get_ppc_hw_breakpoint(&info2, PPC_BREAKPOINT_TRIGGER_READ, wp_addr2, len2); + + /* PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DW ALIGNED, WO test */ + wh1 = ptrace_sethwdebug(child_pid, &info1); + + /* PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DW UNALIGNED, RO test */ + wh2 = ptrace_sethwdebug(child_pid, &info2); + + ptrace(PTRACE_CONT, child_pid, NULL, 0); + check_success(child_pid, name1, "WO", wp_addr1, len1); + + ptrace(PTRACE_CONT, child_pid, NULL, 0); + check_success(child_pid, name2, "RO", wp_addr2, len2); + + ptrace_delhwdebug(child_pid, wh1); + ptrace_delhwdebug(child_pid, wh2); +} + +static void test_multi_sethwdebug_range_dawr_overlap(pid_t child_pid) +{ + struct ppc_hw_breakpoint info1, info2; + unsigned long wp_addr1, wp_addr2; + char *name = "PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DAWR Overlap"; + int len1, len2; + int wh1, wh2; + + wp_addr1 = (unsigned long)&gstruct.a; + wp_addr2 = (unsigned long)&gstruct.a; + len1 = A_LEN; + len2 = A_LEN; + get_ppc_hw_breakpoint(&info1, PPC_BREAKPOINT_TRIGGER_WRITE, wp_addr1, len1); + get_ppc_hw_breakpoint(&info2, PPC_BREAKPOINT_TRIGGER_READ, wp_addr2, len2); + + /* PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DAWR Overlap, WO test */ + wh1 = ptrace_sethwdebug(child_pid, &info1); + + /* PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DAWR Overlap, RO test */ + wh2 = ptrace_sethwdebug(child_pid, &info2); + + ptrace(PTRACE_CONT, child_pid, NULL, 0); + check_success(child_pid, name, "WO", wp_addr1, len1); + + ptrace(PTRACE_CONT, child_pid, NULL, 0); + check_success(child_pid, name, "RO", wp_addr2, len2); + + ptrace_delhwdebug(child_pid, wh1); + ptrace_delhwdebug(child_pid, wh2); +} + static void test_sethwdebug_range_unaligned(pid_t child_pid) { struct ppc_hw_breakpoint info; @@ -504,6 +579,10 @@ run_tests(pid_t child_pid, struct ppc_debug_info *dbginfo, bool dawr) test_sethwdebug_range_unaligned(child_pid); test_sethwdebug_range_unaligned_dar(child_pid); test_sethwdebug_dawr_max_range(child_pid); + if (dbginfo->num_data_bps > 1) { + test_multi_sethwdebug_range(child_pid); + test_multi_sethwdebug_range_dawr_overlap(child_pid); + } } } }