From patchwork Mon Apr 4 09:06:12 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 12800025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7EC0DC4332F for ; Mon, 4 Apr 2022 09:06:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349477AbiDDJIa (ORCPT ); Mon, 4 Apr 2022 05:08:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34624 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346223AbiDDJI0 (ORCPT ); Mon, 4 Apr 2022 05:08:26 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B24A63BA61 for ; Mon, 4 Apr 2022 02:06:30 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 3C96761252 for ; Mon, 4 Apr 2022 09:06:30 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1843FC34112; Mon, 4 Apr 2022 09:06:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1649063189; bh=a4jTOkRQpJP6+3na2bi7YpmqAd5XXyn7buPNcfTQ1WE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=j+oZlCxkNMpQKAOlHkdZnT0qUTDjKnqAtPys0wFfICS44T/k13Sn04Y9D7X7rf1Jj uLm4+P/yEOY8B/OJUNrEt74ZRR9SOpKMYUa6ZuCMJJW4zqNcNNzF0t6L77HpFTZrqX melQuKI5XgKk55kFjjK4JZFkIh+DyDdWaoOsvVAXdY5zrxdMA0pORVqfYCVjUwoxgX pky/ZCnH3eehRFOmhOCWbgiJ8c/DhpHqCBORBQd2iSorHd+JFk7STVafOVvfTyJS8n K4wr8aM9JOFdMSAVNR8OO2l0XG/UJzJiLBhRKqO4xVN+OU5MLsyiGsdpwsmEvpdGEh C/+ac37sI5MLQ== From: Mark Brown To: Catalin Marinas , Will Deacon , Shuah Khan , Shuah Khan Cc: linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org, Mark Brown Subject: [PATCH v2 2/3] kselftest/arm64: Remove assumption that tasks start FPSIMD only Date: Mon, 4 Apr 2022 10:06:12 +0100 Message-Id: <20220404090613.181272-3-broonie@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220404090613.181272-1-broonie@kernel.org> References: <20220404090613.181272-1-broonie@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=3717; h=from:subject; bh=a4jTOkRQpJP6+3na2bi7YpmqAd5XXyn7buPNcfTQ1WE=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBiSrUB2Yj2qaE22cbeGjQpnhdqs87ucVV8by5rRUVN s+bZuxeJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCYkq1AQAKCRAk1otyXVSH0HcIB/ 4yo8lPRrVzFAnelE/fFyAoL2rrArx3J0hwCcyOQxZ2fvarKxUmanOohVVqVg1daP9WZ4QMi5tXIqlm 6yHjjC8eFZk+DV/W4HgtIvrV/NQE7fYFdvVlFf+V0PpM9F5DJIUA4IvEVIQ0S8ivqcXKUNk+w0ocHG 3QrKZlrc5bsMWIrv45btKR23PkO6ofQJvyhoymbqUOJcaPhto/h72phiRfvkRshUp7X7iYiY6cHKeT RsupYZfwP5YvfxcAiJljTXSCt0DmE3udxeuXxE90kGm7vdAsa9S99i/iWfYTdz1BD0GzgWN8yCwsOY YKRf5vlPn5T8x8JxRFcgFvybJpYKrM X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Currently the sve-ptrace test for setting and reading FPSIMD data assumes that the child will start off in FPSIMD only mode and that it can use this to read some FPSIMD mode SVE ptrace data, skipping the test if it can't. This isn't an assumption guaranteed by the ABI and also limits how we can use this testcase within the program. Instead skip the initial read and just generate a FPSIMD format buffer for the write part of the test, making the coverage more robust in the face of future kernel and test program changes. Signed-off-by: Mark Brown Reviewed-by: Shuah Khan --- tools/testing/selftests/arm64/fp/sve-ptrace.c | 39 ++++++++----------- 1 file changed, 16 insertions(+), 23 deletions(-) diff --git a/tools/testing/selftests/arm64/fp/sve-ptrace.c b/tools/testing/selftests/arm64/fp/sve-ptrace.c index 7682798adbba..8f6146d89ca4 100644 --- a/tools/testing/selftests/arm64/fp/sve-ptrace.c +++ b/tools/testing/selftests/arm64/fp/sve-ptrace.c @@ -46,7 +46,7 @@ static const struct vec_type vec_types[] = { #define VL_TESTS (((SVE_VQ_MAX - SVE_VQ_MIN) + 1) * 3) #define FLAG_TESTS 2 -#define FPSIMD_TESTS 3 +#define FPSIMD_TESTS 2 #define EXPECTED_TESTS ((VL_TESTS + FLAG_TESTS + FPSIMD_TESTS) * ARRAY_SIZE(vec_types)) @@ -240,28 +240,24 @@ static void check_u32(unsigned int vl, const char *reg, /* Access the FPSIMD registers via the SVE regset */ static void ptrace_sve_fpsimd(pid_t child, const struct vec_type *type) { - void *svebuf = NULL; - size_t svebufsz = 0; + void *svebuf; struct user_sve_header *sve; struct user_fpsimd_state *fpsimd, new_fpsimd; unsigned int i, j; unsigned char *p; + int ret; - /* New process should start with FPSIMD registers only */ - sve = get_sve(child, type, &svebuf, &svebufsz); - if (!sve) { - ksft_test_result_fail("get_sve(%s): %s\n", - type->name, strerror(errno)); - + svebuf = malloc(SVE_PT_SIZE(0, SVE_PT_REGS_FPSIMD)); + if (!svebuf) { + ksft_test_result_fail("Failed to allocate FPSIMD buffer\n"); return; - } else { - ksft_test_result_pass("get_sve(%s FPSIMD)\n", type->name); } - ksft_test_result((sve->flags & SVE_PT_REGS_MASK) == SVE_PT_REGS_FPSIMD, - "Got FPSIMD registers via %s\n", type->name); - if ((sve->flags & SVE_PT_REGS_MASK) != SVE_PT_REGS_FPSIMD) - goto out; + memset(svebuf, 0, SVE_PT_SIZE(0, SVE_PT_REGS_FPSIMD)); + sve = svebuf; + sve->flags = SVE_PT_REGS_FPSIMD; + sve->size = SVE_PT_SIZE(0, SVE_PT_REGS_FPSIMD); + sve->vl = 16; /* We don't care what the VL is */ /* Try to set a known FPSIMD state via PT_REGS_SVE */ fpsimd = (struct user_fpsimd_state *)((char *)sve + @@ -273,12 +269,11 @@ static void ptrace_sve_fpsimd(pid_t child, const struct vec_type *type) p[j] = j; } - if (set_sve(child, type, sve)) { - ksft_test_result_fail("set_sve(%s FPSIMD): %s\n", - type->name, strerror(errno)); - + ret = set_sve(child, type, sve); + ksft_test_result(ret == 0, "%s FPSIMD set via SVE: %d\n", + type->name, ret); + if (ret) goto out; - } /* Verify via the FPSIMD regset */ if (get_fpsimd(child, &new_fpsimd)) { @@ -548,11 +543,9 @@ static int do_parent(pid_t child) if (getauxval(vec_types[i].hwcap_type) & vec_types[i].hwcap) { ptrace_sve_fpsimd(child, &vec_types[i]); } else { - ksft_test_result_skip("%s FPSIMD get via SVE\n", - vec_types[i].name); ksft_test_result_skip("%s FPSIMD set via SVE\n", vec_types[i].name); - ksft_test_result_skip("%s set read via FPSIMD\n", + ksft_test_result_skip("%s FPSIMD read\n", vec_types[i].name); }