From mboxrd@z Thu Jan 1 00:00:00 1970 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 3B13B39D6E3 for ; Tue, 28 Apr 2026 23:27:06 +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=1777418830; cv=none; b=EwRdwXhYaEK1Rr/MnxfxVp4zS5WgBGBtbZTJwTxdFwVatRjWuJYYeHu0Oe/vH286mceQoX+CxAwuzhTqTQzJOLALnqw9l0sJ5Oefj3UJicwJlJ3FRvCBGtfhNFKcdHfyC23q/1IBTJQLccbe/a2DaW2zhXUJEXmf1eROzeQCLbU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777418830; c=relaxed/simple; bh=rhrho0fYIOx9Mfp8xxBrs+hLDcUtfpXmHRvUgrwN4cA=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=mjBUAMmDl0LprNcGwIaX3UB+CgCbk8F6+5FTX9G2bz5EBmJLqWyWcK6RxCpFhoF8csD2BmX5rjxUgHEgRpWowFUkxCTnyF+WuwtcZS2iQ1xzHCrvlOsRjM0AzXKD9EEB+Kn++dRPDn3xrY/gCwDDAXNT9q3rug+9pIQGTceXbzU= 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=nYBScJ0S; 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="nYBScJ0S" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1777418826; x=1808954826; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=rhrho0fYIOx9Mfp8xxBrs+hLDcUtfpXmHRvUgrwN4cA=; b=nYBScJ0SszwR5JNmIpNNITCGRByxJe5qKCEmI8ebfqohL4uvTX3UYxjR cKOBLKKsJH7IoDqo/Moj4deZzc27w453TYWHgDwko/X1WY7O0r/GUH7qW KKmyxdE34gPPTQWe9RGUekQ19mrY0DL50mVjrCs3yOL0YGcBn+c1F1sUd 6YaVuU9sKfqXLYjNPa2WSxJeGU6ltRwY2OJPTXOozy4ZJn7kob7sVducm cMEx5n/ZS5n+TgJyFU1QBta7UoIgyeN/LIEkx+G7QH51GvB4UO2vGZcbu 8zPHoZ8h9Tyhbg3kjc39JFn72y2k/ppfad2L7Jz947KHGaJK+or1BpOqb A==; X-CSE-ConnectionGUID: fL/LnIX+QMK5AUUoLWEjQg== X-CSE-MsgGUID: FVVciWIrR4ejaurdAahiXQ== X-IronPort-AV: E=McAfee;i="6800,10657,11770"; a="89431926" X-IronPort-AV: E=Sophos;i="6.23,205,1770624000"; d="scan'208";a="89431926" Received: from orviesa006.jf.intel.com ([10.64.159.146]) by orvoesa105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Apr 2026 16:27:05 -0700 X-CSE-ConnectionGUID: xkJvdjWZQCGq8d3Vcy2blQ== X-CSE-MsgGUID: i3vp6W+dQSihyZEsEotJUQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,205,1770624000"; d="scan'208";a="233071123" Received: from jjgreens-desk20.amr.corp.intel.com (HELO agluck-desk3.home.arpa) ([10.124.221.158]) by orviesa006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Apr 2026 16:27:05 -0700 From: Tony Luck To: Borislav Petkov , Babu Moger Cc: x86@kernel.org, linux-kernel@vger.kernel.org, patches@lists.linux.dev, Tony Luck Subject: [PATCH] x86/resctrl: Only check Intel systems for SNC Date: Tue, 28 Apr 2026 16:26:57 -0700 Message-ID: <20260428232657.107381-1-tony.luck@intel.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit topology_num_nodes_per_package() reports values greater than one on certain AMD systems resulting in snc_get_config() printing the confusing message "CoD enabled system? Resctrl not supported". Add a check for Intel systems before looking at topology. Fixes: 59674fc9d0bf ("x86/resctrl: Fix SNC detection") Reported-by: Babu Moger Babu Signed-off-by: Tony Luck Tested-by: Babu Moger Babu --- arch/x86/kernel/cpu/resctrl/monitor.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/resctrl/monitor.c index 9bd87bae4983..59215fef3924 100644 --- a/arch/x86/kernel/cpu/resctrl/monitor.c +++ b/arch/x86/kernel/cpu/resctrl/monitor.c @@ -377,7 +377,12 @@ static const struct x86_cpu_id snc_cpu_ids[] __initconst = { static __init int snc_get_config(void) { - int ret = topology_num_nodes_per_package(); + int ret; + + if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL) + return 1; + + ret = topology_num_nodes_per_package(); if (ret > 1 && !x86_match_cpu(snc_cpu_ids)) { pr_warn("CoD enabled system? Resctrl not supported\n"); -- 2.53.0