From patchwork Wed Dec 2 05:40:46 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rashmica Gupta X-Patchwork-Id: 551182 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 5DD401401DA for ; Wed, 2 Dec 2015 16:42:22 +1100 (AEDT) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b=RsPB3rBs; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 3DEC81A0C70 for ; Wed, 2 Dec 2015 16:42:22 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b=RsPB3rBs; dkim-atps=neutral X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Received: from mail-pa0-x22d.google.com (mail-pa0-x22d.google.com [IPv6:2607:f8b0:400e:c03::22d]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id EC7061A0910 for ; Wed, 2 Dec 2015 16:41:03 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b=RsPB3rBs; dkim-atps=neutral Received: by pacej9 with SMTP id ej9so29663251pac.2 for ; Tue, 01 Dec 2015 21:41:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id; bh=vLrR5dE+ho+V+9rVPNIdkhfcAYyPKkhCLDm+So0A37Q=; b=RsPB3rBsU3CWi+g0sxZanssUdbJl0/O5Sw1FC0JdjMDlxEcLrT/k3ryUHcqWLXgbIz q9BmczQWR2z07Knul0QScIxgbvgjCe0DJ7zc0kxB2BpT4/o71H5SA9Mr1EjIrdzbIxD7 pOHPyWTjV9T53XnFZUZG3wdpz5QQwBODHFmKOUEp+dwthe1mWxjKMhekS7Y3Za5DCCZd GocnfmsQD+77PwkMApAR4jXOr6B6BtaOQvbgRwANvsOEXn8ps2vQhDbQiYvjr+k8jSIU z213SfJDSo0ObGaTn8Ehtx1VjXL5C94phX54kQYVpivYMvKYCaND0qaN/AzdWrkm07CZ KXPg== X-Received: by 10.67.5.98 with SMTP id cl2mr1907830pad.157.1449034862063; Tue, 01 Dec 2015 21:41:02 -0800 (PST) Received: from circle.ozlabs.ibm.com ([122.99.82.10]) by smtp.gmail.com with ESMTPSA id sg4sm1391652pac.48.2015.12.01.21.40.59 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 01 Dec 2015 21:41:01 -0800 (PST) From: Rashmica Gupta To: linuxppc-dev@lists.ozlabs.org Subject: [v3] selftests/powerpc: Add test to check if TAR is corrupted Date: Wed, 2 Dec 2015 16:40:46 +1100 Message-Id: <1449034846-10033-1-git-send-email-rashmicy@gmail.com> X-Mailer: git-send-email 2.5.0 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mikey@neuling.org MIME-Version: 1.0 Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" If the transaction is aborted, the TAR should be rolled back to the checkpointed value before the transaction began. The value written to the TAR when the transaction is suspended should only remain there if the transaction completes successfully. Signed-off-by: Rashmica Gupta --- Added more explanation and fixed up styling issue. No functional changes. tools/testing/selftests/powerpc/tm/.gitignore | 1 + tools/testing/selftests/powerpc/tm/Makefile | 2 +- tools/testing/selftests/powerpc/tm/tm-tar.c | 92 +++++++++++++++++++++++++++ 3 files changed, 94 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/powerpc/tm/tm-tar.c diff --git a/tools/testing/selftests/powerpc/tm/.gitignore b/tools/testing/selftests/powerpc/tm/.gitignore index 76eae258feeb..9bf6749550e3 100644 --- a/tools/testing/selftests/powerpc/tm/.gitignore +++ b/tools/testing/selftests/powerpc/tm/.gitignore @@ -4,3 +4,4 @@ tm-signal-msr-resv tm-signal-stack tm-fork tm-dscr +tm-tar diff --git a/tools/testing/selftests/powerpc/tm/Makefile b/tools/testing/selftests/powerpc/tm/Makefile index 59eec240339d..ab2992f69b4c 100644 --- a/tools/testing/selftests/powerpc/tm/Makefile +++ b/tools/testing/selftests/powerpc/tm/Makefile @@ -1,4 +1,4 @@ -TEST_PROGS := tm-resched-dscr tm-syscall tm-signal-msr-resv tm-signal-stack tm-fork tm-dscr +TEST_PROGS := tm-resched-dscr tm-syscall tm-signal-msr-resv tm-signal-stack tm-fork tm-dscr tm-tar all: $(TEST_PROGS) diff --git a/tools/testing/selftests/powerpc/tm/tm-tar.c b/tools/testing/selftests/powerpc/tm/tm-tar.c new file mode 100644 index 000000000000..732f518c95cf --- /dev/null +++ b/tools/testing/selftests/powerpc/tm/tm-tar.c @@ -0,0 +1,92 @@ +/* + * Copyright 2015, Michael Neuling, IBM Corp. + * Licensed under GPLv2. + * Original: Michael Neuling 19/7/2013 + * Edited: Rashmica Gupta 01/12/2015 + * + * Do some transactions, see if the tar is corrupted. + * If the transaction is aborted, the TAR should be rolled back to the + * checkpointed value before the transaction began. The value written to + * TAR in suspended mode should only remain in TAR if the transaction + * completes. + */ + +#include +#include +#include +#include + +#include "tm.h" +#include "utils.h" + +#define SPRN_TAR 0x32f + +int num_loops = 10000; + +int test_tar(void) +{ + int i; + + SKIP_IF(!have_htm()); + + for (i = 0; i < num_loops; i++) + { + uint64_t result = 0; + asm __volatile__( + "li 7, 1;" + "mtspr %[tar], 7;" /* tar = 1 */ + "tbegin.;" + "beq 3f;" + "li 4, 0x7000;" /* Loop lots, to use time */ + "2:;" /* Start loop */ + "li 7, 2;" + "mtspr %[tar], 7;" /* tar = 2 */ + "tsuspend.;" + "li 7, 3;" + "mtspr %[tar], 7;" /* tar = 3 */ + "tresume.;" + "subi 4, 4, 1;" + "cmpdi 4, 0;" + "bne 2b;" + "tend.;" + + /* Transaction sucess! TAR should be 3 */ + "mfspr 7, %[tar];" + "ori %[res], 7, 4;" // res = 3|4 = 7 + "b 4f;" + + /* Abort handler. TAR should be rolled back to 1 */ + "3:;" + "mfspr 7, %[tar];" + "ori %[res], 7, 8;" // res = 1|8 = 9 + "4:;" + + : [res]"=r"(result) + : [tar]"i"(SPRN_TAR) + : "memory", "r0", "r4", "r7"); + + /* If result is anything else other than 7 or 9, the tar + * value must have been corrupted. */ + if ((result != 7) && (result != 9)) + return 1; + } + return 0; +} + +int main(int argc, char *argv[]) +{ + /* A low number of iterations (eg 100) can cause a false pass */ + if (argc > 1) { + if (strcmp(argv[1], "-h") == 0) { + printf("Syntax:\n\t%s []\n", + argv[0]); + return 0; + } else { + num_loops = atoi(argv[1]); + } + } + + printf("Starting, %d loops\n", num_loops); + + test_harness(test_tar, "tm_tar"); +}