From mboxrd@z Thu Jan 1 00:00:00 1970 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=-17.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 CB484C4338F for ; Tue, 27 Jul 2021 18:25:52 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 98C5860F58 for ; Tue, 27 Jul 2021 18:25:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 98C5860F58 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=YX6GyaGKxdvk6NgwPXHQB13i57m6Epx7YIFwAdOKGo4=; b=3KFEdf+f+9WWRE 6hivAFPgOSje4Ee7Agw7i/K8qq7TLttUkg8NhtgbFsmOTZEcVTNahArh7boT4VFUtnZPoF1nJqeme 35zMkUau1+h+fxIBXVvqyZpXu0czpit3JAVBVwulNO3mUoHAN5Q2J+zJzb0wFeiGgGQ1Z3y339v5H ua/h/y8n9AHMsSwP+SgeYKUGovi9oJpDcIomufa1xjrvvgZ+U9IGR3BHrE+xfB0N8fOQbvgiKLtbJ ODfzDxc4bm0cLsdVlyZ0pke8kI25DmqeLCxVKGFiVBWHCTLwCq356EtYzWhfkmjit8jGVNceWlw83 8OwDZf+EktKlSy7TZI5w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1m8RkB-00FqDf-Cp; Tue, 27 Jul 2021 18:23:55 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1m8RZ5-00Fl5v-0v for linux-arm-kernel@lists.infradead.org; Tue, 27 Jul 2021 18:12:28 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 716CE60F8F; Tue, 27 Jul 2021 18:12:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1627409546; bh=RCUI82H/4W6FmihK1AkpRMF/AXitVCXzKcuEuGl6Cws=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qfYrpzOFiclHXLc3NqAlAi8Tdy1qoaX7rF31MBTBvrdkj85EaPkrjgkECV8hYM6Xb fl2aN5G5U07MkK4XFeZbCK35uVcnacBpk7SYtCc4jL/0NNGZMPCNAh7VvUzRwsr96R En3cV0EkkGt+NFh4Ib4j+c9HO99q7kvWewwQaC8KCFf2y6AbB2/mva9Q05hdSy/xLY YW4C6jWKL0YXzw5H8mGBO/I1rttvqWQIie6s5EHYFumEjFLLWuxRha6vo4bpQZo4zg a1yD/kcWcW/D5UtMgUL3cTy+DQrwa6pVOILXYc95uM2R/lhwDMguWrFn/fEyuHfEWf UFxzb3u8rKAwg== 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 v1 1/3] kselftest/arm64: Provide a helper binary and "library" for SVE RDVL Date: Tue, 27 Jul 2021 19:06:47 +0100 Message-Id: <20210727180649.12943-2-broonie@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210727180649.12943-1-broonie@kernel.org> References: <20210727180649.12943-1-broonie@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=3690; h=from:subject; bh=RCUI82H/4W6FmihK1AkpRMF/AXitVCXzKcuEuGl6Cws=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBhAEs2Mq3zDnqSnFUJ1lvpDawfFS3yduzdzxjq60HD 0JBiBAOJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCYQBLNgAKCRAk1otyXVSH0AFrB/ 0QCP3wT2npf1UclpRSCIYsykb431h/S27r0l1MJksGNS2ZweG+jA3q84D0POpHmjvWGVeSErJ8GDEn DJdxiO6of7P+aRLxFKSGUA/ZatOi2vhRUkXjHpjJNsI6NIqpiMpa51zw5QkpkqDwZO+3i0zN2gRuDy Y5UG9kx9Fl42R9TJ4jpzblZLiSbAtLaAm9ERFsGLbNAfmzXn/T0SVdTFbFPs+tVa0ilxguNJdyf+Vu 6HC26YU6LSJAtP18Xf8afCQtWl5Sv1n+tX2cd9Eba5EqXjmaTvSHRua5n/V2imZIucNYb2w5ilnqtd 3k9kOpHC6cCrBBDjm+ovr4UYp2C8gS X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210727_111227_177302_2A2D26CE X-CRM114-Status: GOOD ( 16.96 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.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 --- 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 | 9 +++++++++ tools/testing/selftests/arm64/fp/rdvl.h | 8 ++++++++ 5 files changed, 37 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..6e76dd720b87 --- /dev/null +++ b/tools/testing/selftests/arm64/fp/rdvl.S @@ -0,0 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only +// Copyright (C) 2021 ARM Limited. + +.arch_extension sve + +.globl rdvl_sve +rdvl_sve: + 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 -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel