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Wed, 5 Aug 2020 06:28:01 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2F9274C058; Wed, 5 Aug 2020 06:27:58 +0000 (GMT) Received: from bangoria.ibmuc.com (unknown [9.199.33.73]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 5 Aug 2020 06:27:57 +0000 (GMT) From: Ravi Bangoria To: mpe@ellerman.id.au Subject: [PATCH v3 1/2] powerpc/watchpoint/ptrace: Fix SETHWDEBUG when CONFIG_HAVE_HW_BREAKPOINT=N Date: Wed, 5 Aug 2020 11:57:49 +0530 Message-Id: <20200805062750.290289-2-ravi.bangoria@linux.ibm.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200805062750.290289-1-ravi.bangoria@linux.ibm.com> References: <20200805062750.290289-1-ravi.bangoria@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235, 18.0.687 definitions=2020-08-05_04:2020-08-03, 2020-08-05 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 suspectscore=1 priorityscore=1501 mlxscore=0 mlxlogscore=999 impostorscore=0 adultscore=0 malwarescore=0 phishscore=0 spamscore=0 bulkscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2008050049 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: christophe.leroy@c-s.fr, ravi.bangoria@linux.ibm.com, mikey@neuling.org, rogealve@br.ibm.com, linux-kernel@vger.kernel.org, paulus@samba.org, jniethe5@gmail.com, pedromfc@br.ibm.com, naveen.n.rao@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" When kernel is compiled with CONFIG_HAVE_HW_BREAKPOINT=N, user can still create watchpoint using PPC_PTRACE_SETHWDEBUG, with limited functionalities. But, such watchpoints are never firing because of the missing privilege settings. Fix that. Reported-by: Pedro Miraglia Franco de Carvalho Suggested-by: Pedro Miraglia Franco de Carvalho Signed-off-by: Ravi Bangoria --- arch/powerpc/kernel/ptrace/ptrace-noadv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/ptrace/ptrace-noadv.c b/arch/powerpc/kernel/ptrace/ptrace-noadv.c index 697c7e4b5877..bf94ab837735 100644 --- a/arch/powerpc/kernel/ptrace/ptrace-noadv.c +++ b/arch/powerpc/kernel/ptrace/ptrace-noadv.c @@ -217,7 +217,7 @@ long ppc_set_hwdebug(struct task_struct *child, struct ppc_hw_breakpoint *bp_inf return -EIO; brk.address = ALIGN_DOWN(bp_info->addr, HW_BREAKPOINT_SIZE); - brk.type = HW_BRK_TYPE_TRANSLATE; + brk.type = HW_BRK_TYPE_TRANSLATE | HW_BRK_TYPE_USER; brk.len = DABR_MAX_LEN; if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_READ) brk.type |= HW_BRK_TYPE_READ;