From patchwork Mon Sep 5 23:44:43 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cyril Bur X-Patchwork-Id: 666102 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 3sSmr46qyfz9s9G for ; Tue, 6 Sep 2016 09:57:40 +1000 (AEST) Received: from ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 3sSmr464DTzDt1M for ; Tue, 6 Sep 2016 09:57:40 +1000 (AEST) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3sSmZR6QXJzDrq6 for ; Tue, 6 Sep 2016 09:45:51 +1000 (AEST) Received: from pps.filterd (m0098394.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.17/8.16.0.17) with SMTP id u85NgxXN017584 for ; Mon, 5 Sep 2016 19:45:50 -0400 Received: from e23smtp09.au.ibm.com (e23smtp09.au.ibm.com [202.81.31.142]) by mx0a-001b2d01.pphosted.com with ESMTP id 259cmb2yxj-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Mon, 05 Sep 2016 19:45:50 -0400 Received: from localhost by e23smtp09.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Tue, 6 Sep 2016 09:45:47 +1000 X-IBM-Helo: d23dlp01.au.ibm.com X-IBM-MailFrom: cyrilbur@gmail.com X-IBM-RcptTo: linuxppc-dev@lists.ozlabs.org Received: from d23relay09.au.ibm.com (d23relay09.au.ibm.com [9.185.63.181]) by d23dlp01.au.ibm.com (Postfix) with ESMTP id 16A502CE805E for ; Tue, 6 Sep 2016 09:45:46 +1000 (EST) Received: from d23av03.au.ibm.com (d23av03.au.ibm.com [9.190.234.97]) by d23relay09.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u85NjkRk52035696 for ; Tue, 6 Sep 2016 09:45:46 +1000 Received: from d23av03.au.ibm.com (localhost [127.0.0.1]) by d23av03.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u85NjjLj025092 for ; Tue, 6 Sep 2016 09:45:45 +1000 Received: from ozlabs.au.ibm.com (ozlabs.au.ibm.com [9.192.253.14]) by d23av03.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id u85NjjA8025082; Tue, 6 Sep 2016 09:45:45 +1000 Received: from camb691.ozlabs.ibm.com (haven.au.ibm.com [9.192.254.114]) (using TLSv1.2 with cipher DHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ozlabs.au.ibm.com (Postfix) with ESMTPSA id 22C13A037C; Tue, 6 Sep 2016 09:45:45 +1000 (AEST) From: Cyril Bur To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH v4 15/20] selftests/powerpc: Add checks for transactional FPUs in signal contexts Date: Tue, 6 Sep 2016 09:44:43 +1000 X-Mailer: git-send-email 2.9.3 In-Reply-To: <20160905234448.5866-1-cyrilbur@gmail.com> References: <20160905234448.5866-1-cyrilbur@gmail.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16090523-0052-0000-0000-000001C3BB1A X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16090523-0053-0000-0000-000006B8AC34 Message-Id: <20160905234448.5866-16-cyrilbur@gmail.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2016-09-05_10:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_spam_definite policy=outbound score=100 spamscore=100 suspectscore=1 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1604210000 definitions=main-1609050346 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mikey@neuling.org, wei.guo.simon@gmail.com Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" If a thread receives a signal while transactional the kernel creates a second context to show the transactional state of the process. This test loads some known values and waits for a signal and confirms that the expected values are in the signal context. Signed-off-by: Cyril Bur --- tools/testing/selftests/powerpc/tm/Makefile | 2 +- .../powerpc/tm/tm-signal-context-chk-fpu.c | 92 ++++++++++++++++++++++ 2 files changed, 93 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/powerpc/tm/tm-signal-context-chk-fpu.c diff --git a/tools/testing/selftests/powerpc/tm/Makefile b/tools/testing/selftests/powerpc/tm/Makefile index 2b6fe8f..103648f 100644 --- a/tools/testing/selftests/powerpc/tm/Makefile +++ b/tools/testing/selftests/powerpc/tm/Makefile @@ -1,4 +1,4 @@ -SIGNAL_CONTEXT_CHK_TESTS := tm-signal-context-chk-gpr +SIGNAL_CONTEXT_CHK_TESTS := tm-signal-context-chk-gpr tm-signal-context-chk-fpu TEST_PROGS := tm-resched-dscr tm-syscall tm-signal-msr-resv tm-signal-stack \ tm-vmxcopy tm-fork tm-tar tm-tmspr $(SIGNAL_CONTEXT_CHK_TESTS) diff --git a/tools/testing/selftests/powerpc/tm/tm-signal-context-chk-fpu.c b/tools/testing/selftests/powerpc/tm/tm-signal-context-chk-fpu.c new file mode 100644 index 0000000..c760deb --- /dev/null +++ b/tools/testing/selftests/powerpc/tm/tm-signal-context-chk-fpu.c @@ -0,0 +1,92 @@ +/* + * Copyright 2016, Cyril Bur, IBM Corp. + * + * 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. + * + * + * Test the kernel's signal frame code. + * + * The kernel sets up two sets of ucontexts if the signal was to be + * delivered while the thread was in a transaction. + * Expected behaviour is that the checkpointed state is in the user + * context passed to the signal handler. The speculated state can be + * accessed with the uc_link pointer. + * + * The rationale for this is that if TM unaware code (which linked + * against TM libs) installs a signal handler it will not know of the + * speculative nature of the 'live' registers and may infer the wrong + * thing. + */ + +#include +#include +#include +#include + +#include + +#include "utils.h" +#include "tm.h" + +#define MAX_ATTEMPT 500000 + +#define NV_FPU_REGS 18 + +long tm_signal_self_context_load(pid_t pid, long *gprs, double *fps, vector int *vms, vector int *vss); + +/* Be sure there are 2x as many as there are NV FPU regs (2x18) */ +static double fps[] = { + 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, + -1,-2,-3,-4,-5,-6,-7,-8,-9,-10,-11,-12,-13,-14,-15,-16,-17,-18 +}; + +static sig_atomic_t fail; + +static void signal_usr1(int signum, siginfo_t *info, void *uc) +{ + int i; + ucontext_t *ucp = uc; + ucontext_t *tm_ucp = ucp->uc_link; + + for (i = 0; i < NV_FPU_REGS && !fail; i++) { + fail = (ucp->uc_mcontext.fp_regs[i + 14] != fps[i]); + fail |= (tm_ucp->uc_mcontext.fp_regs[i + 14] != fps[i + NV_FPU_REGS]); + if (fail) + printf("Failed on %d FP %g or %g\n", i, ucp->uc_mcontext.fp_regs[i + 14], tm_ucp->uc_mcontext.fp_regs[i + 14]); + } +} + +static int tm_signal_context_chk_fpu() +{ + struct sigaction act; + int i; + long rc; + pid_t pid = getpid(); + + SKIP_IF(!have_htm()); + + act.sa_sigaction = signal_usr1; + sigemptyset(&act.sa_mask); + act.sa_flags = SA_SIGINFO; + if (sigaction(SIGUSR1, &act, NULL) < 0) { + perror("sigaction sigusr1"); + exit(1); + } + + i = 0; + while (i < MAX_ATTEMPT && !fail) { + rc = tm_signal_self_context_load(pid, NULL, fps, NULL, NULL); + FAIL_IF(rc != pid); + i++; + } + + return fail; +} + +int main(void) +{ + return test_harness(tm_signal_context_chk_fpu, "tm_signal_context_chk_fpu"); +}