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Mon, 6 Sep 2021 08:43:21 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1C6AEAE058; Mon, 6 Sep 2021 08:43:19 +0000 (GMT) Received: from li-c7b85bcc-2727-11b2-a85c-a9ba7f3a2193.ibm.com.com (unknown [9.43.82.144]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 6 Sep 2021 08:43:18 +0000 (GMT) From: Ganesh Goudar To: linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au Subject: [PATCH v3 2/3] selftests/powerpc: Add test for real address error handling Date: Mon, 6 Sep 2021 14:13:02 +0530 Message-Id: <20210906084303.183921-2-ganeshgr@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210906084303.183921-1-ganeshgr@linux.ibm.com> References: <20210906084303.183921-1-ganeshgr@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: _-qneiQr1wckjdi_BEvrQv1Pz38kTrDJ X-Proofpoint-ORIG-GUID: WMUTbv3QU_MljAGDCzc8AJZftfwJpVX8 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391, 18.0.790 definitions=2021-09-06_04:2021-09-03, 2021-09-06 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 impostorscore=0 priorityscore=1501 clxscore=1015 lowpriorityscore=0 malwarescore=0 bulkscore=0 adultscore=0 mlxlogscore=999 suspectscore=0 phishscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2108310000 definitions=main-2109060054 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: Ganesh Goudar , mahesh@linux.ibm.com, npiggin@gmail.com Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Add test for real address or control memory address access error handling, using NX-GZIP engine. The error is injected by accessing the control memory address using illegal instruction, on successful handling the process attempting to access control memory address using illegal instruction receives SIGBUS. Signed-off-by: Ganesh Goudar --- v3: Avoid using shell script to inject error. v2: Fix build error. --- tools/testing/selftests/powerpc/Makefile | 3 +- tools/testing/selftests/powerpc/mce/Makefile | 7 ++ .../selftests/powerpc/mce/inject-ra-err.c | 65 +++++++++++++++++++ tools/testing/selftests/powerpc/mce/vas-api.h | 1 + 4 files changed, 75 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/powerpc/mce/Makefile create mode 100644 tools/testing/selftests/powerpc/mce/inject-ra-err.c create mode 120000 tools/testing/selftests/powerpc/mce/vas-api.h diff --git a/tools/testing/selftests/powerpc/Makefile b/tools/testing/selftests/powerpc/Makefile index 0830e63818c1..4830372d7416 100644 --- a/tools/testing/selftests/powerpc/Makefile +++ b/tools/testing/selftests/powerpc/Makefile @@ -31,7 +31,8 @@ SUB_DIRS = alignment \ vphn \ math \ ptrace \ - security + security \ + mce endif diff --git a/tools/testing/selftests/powerpc/mce/Makefile b/tools/testing/selftests/powerpc/mce/Makefile new file mode 100644 index 000000000000..2424513982d9 --- /dev/null +++ b/tools/testing/selftests/powerpc/mce/Makefile @@ -0,0 +1,7 @@ +#SPDX-License-Identifier: GPL-2.0-or-later + +TEST_GEN_PROGS := inject-ra-err + +include ../../lib.mk + +$(TEST_GEN_PROGS): ../harness.c diff --git a/tools/testing/selftests/powerpc/mce/inject-ra-err.c b/tools/testing/selftests/powerpc/mce/inject-ra-err.c new file mode 100644 index 000000000000..94323c34d9a6 --- /dev/null +++ b/tools/testing/selftests/powerpc/mce/inject-ra-err.c @@ -0,0 +1,65 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "vas-api.h" +#include "utils.h" + +static bool faulted; + +static void sigbus_handler(int n, siginfo_t *info, void *ctxt_v) +{ + ucontext_t *ctxt = (ucontext_t *)ctxt_v; + struct pt_regs *regs = ctxt->uc_mcontext.regs; + + faulted = true; + regs->nip += 4; +} + +static int test_ra_error(void) +{ + struct vas_tx_win_open_attr attr; + int fd, *paste_addr; + char *devname = "/dev/crypto/nx-gzip"; + struct sigaction act = { + .sa_sigaction = sigbus_handler, + .sa_flags = SA_SIGINFO, + }; + + memset(&attr, 0, sizeof(attr)); + attr.version = 1; + attr.vas_id = 0; + + SKIP_IF(access(devname, F_OK)); + + fd = open(devname, O_RDWR); + FAIL_IF(fd < 0); + FAIL_IF(ioctl(fd, VAS_TX_WIN_OPEN, &attr) < 0); + FAIL_IF(sigaction(SIGBUS, &act, NULL) != 0); + + paste_addr = mmap(NULL, 4096, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0ULL); + + /* The following assignment triggers exception */ + mb(); + *paste_addr = 1; + mb(); + + FAIL_IF(!faulted); + + return 0; +} + +int main(void) +{ + return test_harness(test_ra_error, "inject-ra-err"); +} + diff --git a/tools/testing/selftests/powerpc/mce/vas-api.h b/tools/testing/selftests/powerpc/mce/vas-api.h new file mode 120000 index 000000000000..1455c1bcd351 --- /dev/null +++ b/tools/testing/selftests/powerpc/mce/vas-api.h @@ -0,0 +1 @@ +../../../../../arch/powerpc/include/uapi/asm/vas-api.h \ No newline at end of file -- 2.31.1