From patchwork Tue Sep 3 14:45:25 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Ilpo_J=C3=A4rvinen?= X-Patchwork-Id: 825094 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.17]) (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 2C3A714A4E0; Tue, 3 Sep 2024 14:45:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.17 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725374750; cv=none; b=LnR/yfVxPuq1COX4u7r+c037NghxnMPjV7IsNqd/8uu3VyBDh9kezsNIPiT3FrZ2Ri5WIxqI95J9aWay1vViHoFGeWtulTeyXkvljhbEpgdmbobSsLCtHSuifsOmXOCx7Vv9l0KthAhXRkUYN8L44eSxg67ALy+/WVsdBH04Q3A= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725374750; c=relaxed/simple; bh=OkheW9fep5gmAkh23uQK2aIyS0gnyMxZh++kQMkX4rY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=KX1ysbx8POSnbex8R3n94XQBdrCxaOJ24jQ/u1FaQXO4RH1eYChJpXjsw7oxZyBb8KYQWAuRthDTdr09WWrYGZ4wSV/3ddHsvcmSMcOYQe2GMiyivQkUbtKYl6jf4sJnDUu+gY/XuKW40IzPJPPJJ7Ntc39PlFP40BsZt0AP3Fo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=CzYawxx5; arc=none smtp.client-ip=198.175.65.17 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="CzYawxx5" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1725374749; x=1756910749; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=OkheW9fep5gmAkh23uQK2aIyS0gnyMxZh++kQMkX4rY=; b=CzYawxx5pDYAx6Qgk3VTk8WKYXG64Z4j8PL9pn6JoZbko9WKDsm13NPr CTkvhwukUlWuwpOxQGDIEytFR2J+pae7B+8lXESdk1UVGnOfBuRUG1O9/ sxh+a+xP7Jxvpd2Zqjgb/EFVW6tpUv5v/tUuLre9THHxR7pO1rZDqPFKp voUeDugwmwfIHnSYmLTPRayM3C/dWOKCNcSOsQl847RL/Gbidk7pTQZL8 7rTTaFeGSXN7Y5Yz9j+p3LOF6wsg6kq87cJx3X9eh+knaeyKUB/xsFN1P d+9ym/sMJArxvZtHstycGDjjKEbIB5OTV411yxRC+PG136GhMF3PasBij g==; X-CSE-ConnectionGUID: pEsEjGyTTUycNWdoT3rGRg== X-CSE-MsgGUID: yFcjgDhBTgaMGOrlnGryZg== X-IronPort-AV: E=McAfee;i="6700,10204,11184"; a="24145195" X-IronPort-AV: E=Sophos;i="6.10,199,1719903600"; d="scan'208";a="24145195" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by orvoesa109.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Sep 2024 07:45:48 -0700 X-CSE-ConnectionGUID: ojV7Tc9nSq6TCIQHLxfHmg== X-CSE-MsgGUID: cHXnl2mfRRKkC+xuD58aRQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.10,199,1719903600"; d="scan'208";a="64577442" Received: from ijarvine-desk1.ger.corp.intel.com (HELO localhost) ([10.245.244.241]) by fmviesa006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Sep 2024 07:45:45 -0700 From: =?utf-8?q?Ilpo_J=C3=A4rvinen?= To: Muhammad Usama Anjum , Shuah Khan , Reinette Chatre , linux-kselftest@vger.kernel.org, Fenghua Yu , linux-kernel@vger.kernel.org Cc: Shaopeng Tan , =?utf-8?q?Maciej_Wiecz=C3=B3?= =?utf-8?q?r-Retman?= , =?utf-8?q?Ilpo_J?= =?utf-8?q?=C3=A4rvinen?= Subject: [PATCH v4 1/4] selftests/resctrl: Generalize non-contiguous CAT check Date: Tue, 3 Sep 2024 17:45:25 +0300 Message-Id: <20240903144528.46811-2-ilpo.jarvinen@linux.intel.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240903144528.46811-1-ilpo.jarvinen@linux.intel.com> References: <20240903144528.46811-1-ilpo.jarvinen@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 arch_supports_noncont_cat() checks if vendor is ARCH_AMD and if that is not true, ARCH_INTEL is assumed which might not be true either because get_vendor() can also return zero if neither AMD nor Intel is detected. Generalize the vendor check using switch/case logic and return false for unknown vendors. Signed-off-by: Ilpo Järvinen Reviewed-by: Muhammad Usama Anjum --- tools/testing/selftests/resctrl/cat_test.c | 26 +++++++++++++--------- 1 file changed, 16 insertions(+), 10 deletions(-) diff --git a/tools/testing/selftests/resctrl/cat_test.c b/tools/testing/selftests/resctrl/cat_test.c index 742782438ca3..51a1cb6aac34 100644 --- a/tools/testing/selftests/resctrl/cat_test.c +++ b/tools/testing/selftests/resctrl/cat_test.c @@ -292,19 +292,25 @@ static bool arch_supports_noncont_cat(const struct resctrl_test *test) { unsigned int eax, ebx, ecx, edx; - /* AMD always supports non-contiguous CBM. */ - if (get_vendor() == ARCH_AMD) + switch (get_vendor()) { + case ARCH_AMD: + /* AMD always supports non-contiguous CBM. */ return true; - /* Intel support for non-contiguous CBM needs to be discovered. */ - 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 false; + case ARCH_INTEL: + /* Intel support for non-contiguous CBM needs to be discovered. */ + 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 false; + + return ((ecx >> 3) & 1); - return ((ecx >> 3) & 1); + default: + return false; + } } static int noncont_cat_run_test(const struct resctrl_test *test,