From patchwork Thu Dec 3 00:48:35 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rashmica Gupta X-Patchwork-Id: 552024 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 6A4DB1402A0 for ; Thu, 3 Dec 2015 11:51:09 +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=p5z7avhw; 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 2FEE91A0D4C for ; Thu, 3 Dec 2015 11:51:09 +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=p5z7avhw; dkim-atps=neutral X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Received: from mail-pa0-x236.google.com (mail-pa0-x236.google.com [IPv6:2607:f8b0:400e:c03::236]) (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 770691A0E33 for ; Thu, 3 Dec 2015 11:48:51 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b=p5z7avhw; dkim-atps=neutral Received: by pacej9 with SMTP id ej9so55459503pac.2 for ; Wed, 02 Dec 2015 16:48:49 -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=lRkdCfHudTbVXQbtAV4YTot+wZBx2Y36IbykPTGwiko=; b=p5z7avhwm7cUjvDBSlzJQGvgZaiJ+v90NfnFPZBzhnbb3ajPIe2EAyZEkv7pyHoaV2 d36NrXCN763Ci5eWj/KGcHezKckjvSMvAALgR3Eu6oD0aQx5R5UGwEqJDKVahlE2wNyJ i5DBtZCjPSAsnJd6rplQ8NjGG821F7jZpI/Q8stmEu4OaoT/89RyNr6NpHDzg6te7Bd+ s06hyUTLcEOjzy41hcWjgLqPZNUD6sUBxElOycmHdfefOl7cvk/ru9b1+4OVV3jccF5W b6c1sz1C686oqrgheG7Q2Dig5SYkyBHlWdVfsT/XsgQ5GAr61WXKL0ftXKMcBmjSjcIL MijA== X-Received: by 10.98.12.8 with SMTP id u8mr9225094pfi.76.1449103729582; Wed, 02 Dec 2015 16:48:49 -0800 (PST) Received: from circle.ozlabs.ibm.com ([122.99.82.10]) by smtp.gmail.com with ESMTPSA id sm8sm6628281pac.43.2015.12.02.16.48.47 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 02 Dec 2015 16:48:48 -0800 (PST) From: Rashmica Gupta To: linuxppc-dev@lists.ozlabs.org Subject: [v4] selftests/powerpc: Add test to check if TAR is corrupted Date: Thu, 3 Dec 2015 11:48:35 +1100 Message-Id: <1449103715-28514-1-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 --- This must be run before tm-signal-stack as after this test is run a reboot is required -- changed the order of the tests in the Makefile. 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 dc368f789afa..cd3d42a15601 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-fork tm-dscr tm-signal-stack +TEST_PROGS := tm-resched-dscr tm-syscall tm-signal-msr-resv tm-fork tm-dscr tm-tar tm-signal-stack 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..41873b5cb3b8 --- /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 1; + } else { + num_loops = atoi(argv[1]); + } + } + + printf("Starting, %d loops\n", num_loops); + + return test_harness(test_tar, "tm_tar"); +}