From patchwork Thu Oct 21 18:07:18 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 12576083 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8B70FC433F5 for ; Thu, 21 Oct 2021 18:09:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6EB4461B02 for ; Thu, 21 Oct 2021 18:09:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232326AbhJUSLy (ORCPT ); Thu, 21 Oct 2021 14:11:54 -0400 Received: from mail.kernel.org ([198.145.29.99]:57418 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229968AbhJUSLx (ORCPT ); Thu, 21 Oct 2021 14:11:53 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id CF83C61B00; Thu, 21 Oct 2021 18:09:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1634839777; bh=eO/F2zPDtOy38msGhvhsrpGcFNbA8P0w6Qp8+mGKyz8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=acfYj+vehWJGjM+6MOKJOGv779g19/R++oJP1UIuWIzVHGhHCpJ/+MBNgk2cbRJ0T qfVjGKX111w1Aol9PNJzEDsZPk5FVL/5MyfklnKarg4lXKT8tcBAFq+F6ndUwRmH6d IhIb6DVT3QwXxoJqv6Lwbu9fonjo6lnBdtxbn72x9FNFz1oNUQ4CgLhmusfgjGba7g sOuvV55poiSFj63wILqJ5GPriKTDCqv7zMNPSyn+OFUnqdKraeZo7meneYdsUipmKm REgqXCmA/g8QqNOXp0bKiELPvn2AXCFqWKtmdSeAH3BKl6c285ZdV42ElNTdR6CZ62 XGmOScim8r5og== From: Mark Brown To: Catalin Marinas , Will Deacon , Shuah Khan , Shuah Khan Cc: Alan Hayward , Luis Machado , Salil Akerkar , Basant Kumar Dwivedi , Szabolcs Nagy , linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org, Mark Brown Subject: [PATCH v4 29/33] kselftest/arm64: sme: Provide streaming mode SVE stress test Date: Thu, 21 Oct 2021 19:07:18 +0100 Message-Id: <20211021180722.3699248-30-broonie@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211021180722.3699248-1-broonie@kernel.org> References: <20211021180722.3699248-1-broonie@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=5064; h=from:subject; bh=eO/F2zPDtOy38msGhvhsrpGcFNbA8P0w6Qp8+mGKyz8=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBhcaxVZEbFJJmpK4t4PKZMcpxeYXZVlUuwsAuQUNDL PnRVsp6JATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCYXGsVQAKCRAk1otyXVSH0My2B/ 9D7Dvyw05ZyOXuLq8KjN4yca6MSeX/TtfSOofALY/kzuSkVrHh/Uavrv+eVFw1eIKdRr4x+MOXHzwq ohlmFgeI7Z15B3Z50LwqH8PGsiR6Le/sVYIOWWJCLM6mmm17/5PVMAo7DMVt4H4sTiOKb5DjYJ0Ye2 chtrDc4/QJ/LAXqKa/BZSIRoQKK8pa7bD87QsW/H3sSynWx6zUMpP7sUJiri4/kew3SfKKVlUCNKcq GCaoeTGMBnDaOiR1Uqvh3dBmAh28cT9C2SZSVfr0cfH4wogUgKxm3i+hCpN8iuDrfrK6BTMTY3+bBn opr0breaFkwXVSWur9lcwtDSwm60r7 X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org One of the features of SME is the addition of streaming mode, in which we have access to a set of streaming mode SVE registers at the SME vector length. Since these are accessed using the SVE instructions let's reuse the existing SVE stress test for testing with a compile time option for controlling the few small differences needed: - Enter streaming mode immediately on starting the program. - In streaming mode FFR is removed so skip reading and writing FFR. In order to avoid requiring a cutting edge toolchain with SME support use the op/CR form for specifying SVCR. Signed-off-by: Mark Brown --- tools/testing/selftests/arm64/fp/.gitignore | 1 + tools/testing/selftests/arm64/fp/Makefile | 3 + tools/testing/selftests/arm64/fp/ssve-stress | 59 ++++++++++++++++++++ tools/testing/selftests/arm64/fp/sve-test.S | 30 ++++++++++ 4 files changed, 93 insertions(+) create mode 100644 tools/testing/selftests/arm64/fp/ssve-stress diff --git a/tools/testing/selftests/arm64/fp/.gitignore b/tools/testing/selftests/arm64/fp/.gitignore index 885dd592807b..73c600e1ab81 100644 --- a/tools/testing/selftests/arm64/fp/.gitignore +++ b/tools/testing/selftests/arm64/fp/.gitignore @@ -4,5 +4,6 @@ rdvl-sve sve-probe-vls sve-ptrace sve-test +ssve-test vec-syscfg vlset diff --git a/tools/testing/selftests/arm64/fp/Makefile b/tools/testing/selftests/arm64/fp/Makefile index 11d4fc3b7115..6d9e4d1922e4 100644 --- a/tools/testing/selftests/arm64/fp/Makefile +++ b/tools/testing/selftests/arm64/fp/Makefile @@ -5,6 +5,7 @@ TEST_GEN_PROGS := sve-ptrace sve-probe-vls vec-syscfg TEST_PROGS_EXTENDED := fpsimd-test fpsimd-stress \ rdvl-sme rdvl-sve \ sve-test sve-stress \ + ssve-test ssve-stress \ vlset all: $(TEST_GEN_PROGS) $(TEST_PROGS_EXTENDED) @@ -17,6 +18,8 @@ sve-ptrace: sve-ptrace.o sve-probe-vls: sve-probe-vls.o rdvl.o sve-test: sve-test.o asm-utils.o $(CC) -nostdlib $^ -o $@ +ssve-test: sve-test.S asm-utils.o + $(CC) -DSSVE -nostdlib $^ -o $@ vec-syscfg: vec-syscfg.o rdvl.o vlset: vlset.o diff --git a/tools/testing/selftests/arm64/fp/ssve-stress b/tools/testing/selftests/arm64/fp/ssve-stress new file mode 100644 index 000000000000..e2bd2cc184ad --- /dev/null +++ b/tools/testing/selftests/arm64/fp/ssve-stress @@ -0,0 +1,59 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0-only +# Copyright (C) 2015-2019 ARM Limited. +# Original author: Dave Martin + +set -ue + +NR_CPUS=`nproc` + +pids= +logs= + +cleanup () { + trap - INT TERM CHLD + set +e + + if [ -n "$pids" ]; then + kill $pids + wait $pids + pids= + fi + + if [ -n "$logs" ]; then + cat $logs + rm $logs + logs= + fi +} + +interrupt () { + cleanup + exit 0 +} + +child_died () { + cleanup + exit 1 +} + +trap interrupt INT TERM EXIT + +for x in `seq 0 $((NR_CPUS * 4))`; do + log=`mktemp` + logs=$logs\ $log + ./ssve-test >$log & + pids=$pids\ $! +done + +# Wait for all child processes to be created: +sleep 10 + +while :; do + kill -USR1 $pids +done & +pids=$pids\ $! + +wait + +exit 1 diff --git a/tools/testing/selftests/arm64/fp/sve-test.S b/tools/testing/selftests/arm64/fp/sve-test.S index f5b1b48ffff2..31764e8370db 100644 --- a/tools/testing/selftests/arm64/fp/sve-test.S +++ b/tools/testing/selftests/arm64/fp/sve-test.S @@ -156,6 +156,7 @@ endfunction // We fill the upper lanes of FFR with zeros. // Beware: corrupts P0. function setup_ffr +#ifndef SSVE mov x4, x30 and w0, w0, #0x3 @@ -178,6 +179,9 @@ function setup_ffr wrffr p0.b ret x4 +#else + ret +#endif endfunction // Trivial memory compare: compare x2 bytes starting at address x0 with @@ -260,6 +264,7 @@ endfunction // Beware -- corrupts P0. // Clobbers x0-x5. function check_ffr +#ifndef SSVE mov x3, x30 ldr x4, =scratch @@ -280,6 +285,9 @@ function check_ffr mov x2, x5 mov x30, x3 b memcmp +#else + ret +#endif endfunction // Any SVE register modified here can cause corruption in the main @@ -295,13 +303,26 @@ function irritator_handler movi v0.8b, #1 movi v9.16b, #2 movi v31.8b, #3 +#ifndef SSVE // And P0 rdffr p0.b // And FFR wrffr p15.b +#endif + + ret +endfunction + +#ifdef SSVE +function enable_sm + // Set SVCR.SM to 1, equivalent to SMSTART SM but doesn't need a + // SME capable toolchain. + mov x0, #1 + msr S3_3_C4_C2_2, x0 ret endfunction +#endif function terminate_handler mov w21, w0 @@ -359,6 +380,11 @@ endfunction .globl _start function _start _start: +#ifdef SSVE + puts "Streaming mode " + bl enable_sm +#endif + // Sanity-check and report the vector length rdvl x19, #8 @@ -407,6 +433,10 @@ _start: orr w2, w2, #SA_NODEFER bl setsignal +#ifdef SSVE + bl enable_sm // syscalls will have exited streaming mode +#endif + mov x22, #0 // generation number, increments per iteration .Ltest_loop: rdvl x0, #8