From patchwork Thu Jan 25 11:13:16 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maciej Wieczor-Retman X-Patchwork-Id: 13530687 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.13]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8DB2D55C06; Thu, 25 Jan 2024 11:13:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.13 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706181216; cv=none; b=GRXGEC1J3l/r2RWGBUQ3PLIC7H2YBnV08FNOF1xs+nSZPetYtu+BQWYNjAzHEHG1L90NhriDIXPQy/9pTamXRqv63nh1zVfcZU/EkfSdfoycqtee3e/rPjbQjts89ErrdwtqaR6FGSGQhpeWSFdduG5maL4b8ORtOk6Qn36EvuQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706181216; c=relaxed/simple; bh=wvPvlJpDpd/QxRlMnz5Gl6xGp3XTyHaDNtoD/6HTHOQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=vFxplZA8wLFkDMjYlSafQwlAej2V1Naelq25QOOJ/Pus3BPhfHewb6giTHlNttwQlOHS38wtJLcp8oIrP0hFkf+m5ygVSSWPehexnqzfGK7dDpya5tvVpnXXWl4RVbYtKx+wg2uDCRHWyYxfK1FiZKcTFVFpJ+Bo5IPBp00Wi0s= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=BPbFMRmb; arc=none smtp.client-ip=198.175.65.13 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="BPbFMRmb" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1706181215; x=1737717215; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=wvPvlJpDpd/QxRlMnz5Gl6xGp3XTyHaDNtoD/6HTHOQ=; b=BPbFMRmbtrkwp3z+ygHstZIHNvA2QNg6p2QzkofD0FvT5g0i8LhAG8iE reqByJbImi7+SEl16gkCOptcYV58BJuhLnTlfPhgUAZnKzTKpaVQ1ODcE +U8B0/jlMEzTG3nODwrKsv84L0t0mtfbVJJLPbMttcxV9UaWfUn2Qu9+6 hIZ1O9bGSITIkcsIzHP52oQFRfO+YF0d5amlzDV/d5KFfRGLRTNLEkvta 2lJncC+oy07Jo/Vmp5Nlbq/fVigGTCMDrLVbNzhhtX2tuB6zEk/7DHf4a fSuTvgGDDBRFMeWTnEHDpMx7QQ0OaXv2WyN74tK9yB9ZaGR//KLTieXr+ g==; X-IronPort-AV: E=McAfee;i="6600,9927,10962"; a="9244677" X-IronPort-AV: E=Sophos;i="6.05,216,1701158400"; d="scan'208";a="9244677" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orvoesa105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jan 2024 03:13:34 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10962"; a="959823461" X-IronPort-AV: E=Sophos;i="6.05,216,1701158400"; d="scan'208";a="959823461" Received: from apejovix-mobl1.ger.corp.intel.com (HELO wieczorr-mobl1.intel.com) ([10.213.0.239]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jan 2024 03:13:31 -0800 From: Maciej Wieczor-Retman To: fenghua.yu@intel.com, reinette.chatre@intel.com, shuah@kernel.org Cc: linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, ilpo.jarvinen@linux.intel.com Subject: [PATCH v3 5/5] selftests/resctrl: Add non-contiguous CBMs CAT test Date: Thu, 25 Jan 2024 12:13:16 +0100 Message-ID: <647fbfd449f8b0e0ad6cfe58bb280ff44ee162b8.1706180726.git.maciej.wieczor-retman@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add tests for both L2 and L3 CAT to verify the return values generated by writing non-contiguous CBMs don't contradict the reported non-contiguous support information. Use a logical XOR to confirm return value of write_schemata() and non-contiguous CBMs support information match. Signed-off-by: Maciej Wieczor-Retman --- Changelog v3: - Roll back __cpuid_count part. (Reinette) - Update function name to read sparse_masks file. - Roll back get_cache_level() changes. - Add ksft_print_msg() to contiguous schemata write error handling (Reinette). Changelog v2: - Redo the patch message. (Ilpo) - Tidy up __cpuid_count calls. (Ilpo) - Remove redundant AND in noncont_mask calculations (Ilpo) - Fix bit_center offset. - Add newline before function return. (Ilpo) - Group non-contiguous tests with CAT tests. (Ilpo) - Use a helper for reading sparse_masks file. (Ilpo) - Make get_cache_level() available in other source files. (Ilpo) tools/testing/selftests/resctrl/cat_test.c | 81 +++++++++++++++++++ tools/testing/selftests/resctrl/resctrl.h | 2 + .../testing/selftests/resctrl/resctrl_tests.c | 2 + 3 files changed, 85 insertions(+) diff --git a/tools/testing/selftests/resctrl/cat_test.c b/tools/testing/selftests/resctrl/cat_test.c index 39fc9303b8e8..9086bf359072 100644 --- a/tools/testing/selftests/resctrl/cat_test.c +++ b/tools/testing/selftests/resctrl/cat_test.c @@ -294,6 +294,71 @@ static int cat_run_test(const struct resctrl_test *test, const struct user_param return ret; } +static int noncont_cat_run_test(const struct resctrl_test *test, + const struct user_params *uparams) +{ + unsigned long full_cache_mask, cont_mask, noncont_mask; + unsigned int eax, ebx, ecx, edx, ret, sparse_masks; + char schemata[64]; + int bit_center; + + /* Check to compare sparse_masks content to CPUID output. */ + ret = resource_info_unsigned_get(test->resource, "sparse_masks", &sparse_masks); + if (ret) + return ret; + + if (!strcmp(test->resource, "L3")) + __cpuid_count(0x10, 1, eax, ebx, ecx, edx); + else if (!strcmp(test->resource, "L2")) + __cpuid_count(0x10, 2, eax, ebx, ecx, edx); + else + return -EINVAL; + + if (sparse_masks != ((ecx >> 3) & 1)) { + ksft_print_msg("CPUID output doesn't match 'sparse_masks' file content!\n"); + return -1; + } + + /* Write checks initialization. */ + ret = get_full_cbm(test->resource, &full_cache_mask); + if (ret < 0) + return ret; + bit_center = count_bits(full_cache_mask) / 2; + cont_mask = full_cache_mask >> bit_center; + + /* Contiguous mask write check. */ + snprintf(schemata, sizeof(schemata), "%lx", cont_mask); + ret = write_schemata("", schemata, uparams->cpu, test->resource); + if (ret) { + ksft_print_msg("Write of contiguous CBM failed\n"); + return ret; + } + + /* + * Non-contiguous mask write check. CBM has a 0xf hole approximately in the middle. + * Output is compared with support information to catch any edge case errors. + */ + noncont_mask = ~(0xf << (bit_center - 2)) & full_cache_mask; + snprintf(schemata, sizeof(schemata), "%lx", noncont_mask); + ret = write_schemata("", schemata, uparams->cpu, test->resource); + if (ret && sparse_masks) + ksft_print_msg("Non-contiguous CBMs supported but write of non-contiguous CBM failed\n"); + else if (ret && !sparse_masks) + ksft_print_msg("Non-contiguous CBMs not supported and write of non-contiguous CBM failed as expected\n"); + else if (!ret && !sparse_masks) + ksft_print_msg("Non-contiguous CBMs not supported but write of non-contiguous CBM succeeded\n"); + + return !ret == !sparse_masks; +} + +static bool noncont_cat_feature_check(const struct resctrl_test *test) +{ + if (!resctrl_resource_exists(test->resource)) + return false; + + return resource_info_file_exists(test->resource, "sparse_masks"); +} + struct resctrl_test l3_cat_test = { .name = "L3_CAT", .group = "CAT", @@ -301,3 +366,19 @@ struct resctrl_test l3_cat_test = { .feature_check = test_resource_feature_check, .run_test = cat_run_test, }; + +struct resctrl_test l3_noncont_cat_test = { + .name = "L3_NONCONT_CAT", + .group = "CAT", + .resource = "L3", + .feature_check = noncont_cat_feature_check, + .run_test = noncont_cat_run_test, +}; + +struct resctrl_test l2_noncont_cat_test = { + .name = "L2_NONCONT_CAT", + .group = "CAT", + .resource = "L2", + .feature_check = noncont_cat_feature_check, + .run_test = noncont_cat_run_test, +}; diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/selftests/resctrl/resctrl.h index c39105f46da9..8cb97f278459 100644 --- a/tools/testing/selftests/resctrl/resctrl.h +++ b/tools/testing/selftests/resctrl/resctrl.h @@ -210,5 +210,7 @@ extern struct resctrl_test mbm_test; extern struct resctrl_test mba_test; extern struct resctrl_test cmt_test; extern struct resctrl_test l3_cat_test; +extern struct resctrl_test l3_noncont_cat_test; +extern struct resctrl_test l2_noncont_cat_test; #endif /* RESCTRL_H */ diff --git a/tools/testing/selftests/resctrl/resctrl_tests.c b/tools/testing/selftests/resctrl/resctrl_tests.c index 3044179ee6e9..f3dc1b9696e7 100644 --- a/tools/testing/selftests/resctrl/resctrl_tests.c +++ b/tools/testing/selftests/resctrl/resctrl_tests.c @@ -19,6 +19,8 @@ static struct resctrl_test *resctrl_tests[] = { &mba_test, &cmt_test, &l3_cat_test, + &l3_noncont_cat_test, + &l2_noncont_cat_test, }; static int detect_vendor(void)