From patchwork Thu Jul 29 15:15:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 12408943 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 459D6C4338F for ; Thu, 29 Jul 2021 15:17:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3121260F22 for ; Thu, 29 Jul 2021 15:17:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237531AbhG2PRp (ORCPT ); Thu, 29 Jul 2021 11:17:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:33818 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229864AbhG2PRo (ORCPT ); Thu, 29 Jul 2021 11:17:44 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 12C8160F43; Thu, 29 Jul 2021 15:17:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1627571861; bh=CdGB4OG/NflCYBfXLsaKyb4ZgSAIM7cHqA6soZ5TczM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AG43rLo4tyHymQ80wxLw6LIq0QF/NaV8f9ij2Lh9k5RV8sqT/1OOZUj6B/izNHSsz SNDjUmmIX1s7D0urMMhWNvGu2tsQ6KyDB/enGET9i2hILSO3grPOwEGN8kfJzMQ0Nd 4UBYV4dzId4D1u1Yyl34FQ1CeUPR8TyFDMkKRvJOpDlvmkPIzCFYuJEIV6vOVtzC2B Svq7vMuGlqwMyNygFXiS6iRy+4nC2oCYzSAx07wgMFUIe5r2HNZLOugGHLdvlOtdjI JdmNlJONju6Q7I+K3Fx+SzVnYpnOZZmSwGFu2F4AAjzAjHqVnXtDSYEnf+XG4H9L2v I7ki6S5PuaZEQ== From: Mark Brown To: Catalin Marinas , Will Deacon , Shuah Khan Cc: Dave Martin , linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org, Mark Brown Subject: [PATCH v3 1/4] kselftest/arm64: Provide a helper binary and "library" for SVE RDVL Date: Thu, 29 Jul 2021 16:15:15 +0100 Message-Id: <20210729151518.46388-2-broonie@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210729151518.46388-1-broonie@kernel.org> References: <20210729151518.46388-1-broonie@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=3762; h=from:subject; bh=CdGB4OG/NflCYBfXLsaKyb4ZgSAIM7cHqA6soZ5TczM=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBhAsX8oc07YHrsOh1K2NDPohsDGoEt9Zt9fNhL16wI 3/ocqPOJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCYQLF/AAKCRAk1otyXVSH0PWKB/ 0fN+2JYtxYgXaZ+mHwZYyVt9uZcRhtS6QCUu8L1rIzV4FEN3O2mowmjNlC9iOBx/LZgjJVN3yrp/8d 4K4BpHkq6veff/Fjq1qhkTs3EUIvvfD3blJ+Y3bVnibb3pAgXlJhDnyHJQnyKtvWMru/gekH1aZdIz 9u33Y3C6FNH9O89swFTjd+6h6jnyTuL+t1+HIagHg9iwtnj124a23lRB48tObBzwMAgqhZm/hK1r74 sWWaaqsuw2LjkiH4PEJg254C3EKfDPznR8rY/LoQ32FScNrBvmyavmBiBBLlPtwR7l7fFbthMx7zVt QAgV1UAC7W7dvxIcNFTwFtI6NIDCuo X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org SVE provides an instruction RDVL which reports the currently configured vector length. In order to validate that our vector length configuration interfaces are working correctly without having to build the C code for our test programs with SVE enabled provide a trivial assembly library with a C callable function that executes RDVL. Since these interfaces also control behaviour on exec*() provide a trivial wrapper program which reports the currently configured vector length on stdout, tests can use this to verify that behaviour on exec*() is as expected. In preparation for providing similar helper functionality for SME, the Scalable Matrix Extension, which allows separately configured vector lengths to be read back both the assembler function and wrapper binary have SVE included in their name. Signed-off-by: Mark Brown Reviewed-by: Dave Martin --- tools/testing/selftests/arm64/fp/.gitignore | 1 + tools/testing/selftests/arm64/fp/Makefile | 6 +++++- tools/testing/selftests/arm64/fp/rdvl-sve.c | 14 ++++++++++++++ tools/testing/selftests/arm64/fp/rdvl.S | 10 ++++++++++ tools/testing/selftests/arm64/fp/rdvl.h | 8 ++++++++ 5 files changed, 38 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/arm64/fp/rdvl-sve.c create mode 100644 tools/testing/selftests/arm64/fp/rdvl.S create mode 100644 tools/testing/selftests/arm64/fp/rdvl.h diff --git a/tools/testing/selftests/arm64/fp/.gitignore b/tools/testing/selftests/arm64/fp/.gitignore index d66f76d2a650..6b53a7b60fee 100644 --- a/tools/testing/selftests/arm64/fp/.gitignore +++ b/tools/testing/selftests/arm64/fp/.gitignore @@ -1,4 +1,5 @@ fpsimd-test +rdvl-sve sve-probe-vls sve-ptrace sve-test diff --git a/tools/testing/selftests/arm64/fp/Makefile b/tools/testing/selftests/arm64/fp/Makefile index a57009d3a0dc..ed62e7003b96 100644 --- a/tools/testing/selftests/arm64/fp/Makefile +++ b/tools/testing/selftests/arm64/fp/Makefile @@ -2,12 +2,16 @@ CFLAGS += -I../../../../../usr/include/ TEST_GEN_PROGS := sve-ptrace sve-probe-vls -TEST_PROGS_EXTENDED := fpsimd-test fpsimd-stress sve-test sve-stress vlset +TEST_PROGS_EXTENDED := fpsimd-test fpsimd-stress \ + rdvl-sve \ + sve-test sve-stress \ + vlset all: $(TEST_GEN_PROGS) $(TEST_PROGS_EXTENDED) fpsimd-test: fpsimd-test.o $(CC) -nostdlib $^ -o $@ +rdvl-sve: rdvl-sve.o rdvl.o sve-ptrace: sve-ptrace.o sve-ptrace-asm.o sve-probe-vls: sve-probe-vls.o sve-test: sve-test.o diff --git a/tools/testing/selftests/arm64/fp/rdvl-sve.c b/tools/testing/selftests/arm64/fp/rdvl-sve.c new file mode 100644 index 000000000000..7f8a13a18f5d --- /dev/null +++ b/tools/testing/selftests/arm64/fp/rdvl-sve.c @@ -0,0 +1,14 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include + +#include "rdvl.h" + +int main(void) +{ + int vl = rdvl_sve(); + + printf("%d\n", vl); + + return 0; +} diff --git a/tools/testing/selftests/arm64/fp/rdvl.S b/tools/testing/selftests/arm64/fp/rdvl.S new file mode 100644 index 000000000000..c916c1c9defd --- /dev/null +++ b/tools/testing/selftests/arm64/fp/rdvl.S @@ -0,0 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-only +// Copyright (C) 2021 ARM Limited. + +.arch_extension sve + +.globl rdvl_sve +rdvl_sve: + hint 34 // BTI C + rdvl x0, #1 + ret diff --git a/tools/testing/selftests/arm64/fp/rdvl.h b/tools/testing/selftests/arm64/fp/rdvl.h new file mode 100644 index 000000000000..7c9d953fc9e7 --- /dev/null +++ b/tools/testing/selftests/arm64/fp/rdvl.h @@ -0,0 +1,8 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef RDVL_H +#define RDVL_H + +int rdvl_sve(void); + +#endif