From patchwork Fri May 19 00:04:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alison Schofield X-Patchwork-Id: 13247554 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 BDB62C77B7D for ; Fri, 19 May 2023 00:05:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230164AbjESAFE (ORCPT ); Thu, 18 May 2023 20:05:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49820 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230056AbjESAFD (ORCPT ); Thu, 18 May 2023 20:05:03 -0400 Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 383D1E77; Thu, 18 May 2023 17:05:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1684454702; x=1715990702; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=K3xHRy6KbwsjGx/sRwLZsoxpVJFd7CR2yUrei5ryLZ0=; b=Eb8ZRt8KiHsEN3EXssJCWv+OZ074B7MIrrnUiez0iq6VoMaZy8S/kE7/ QZwCKhrEsZGvgwGGfayPhBls5vir9tk7lNyOEAbZ1hsZrz8XOeNf6/E2S GnrRcJnxuzksS5zzXqJlygOeCGtl0iVn5T4Svw2OdtV0YsVa91BWzqDt5 I0dxomKp5E851pSIG3Js2ajdlTb3heEWqNDTk9GtREL7N7NkfgJ/pXw7a rMAk0Kuhdj/1jBhCqmNeNaah+/bNuzTxiYGDUfB10i1RBg+jeAt6dOviF jFdunp+IoLy4ERyx5XJzhPaPulgqDJ3ZTUOqTf6I+H7MuejZZ2aajrAp5 w==; X-IronPort-AV: E=McAfee;i="6600,9927,10714"; a="355446219" X-IronPort-AV: E=Sophos;i="6.00,175,1681196400"; d="scan'208";a="355446219" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 May 2023 17:05:01 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10714"; a="876634939" X-IronPort-AV: E=Sophos;i="6.00,175,1681196400"; d="scan'208";a="876634939" Received: from aschofie-mobl2.amr.corp.intel.com (HELO localhost) ([10.251.20.44]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 May 2023 17:05:01 -0700 From: alison.schofield@intel.com To: "Rafael J. Wysocki" , Len Brown , Dan Williams , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Andy Lutomirski , Peter Zijlstra , Andrew Morton , Jonathan Cameron , Dave Jiang Cc: Alison Schofield , x86@kernel.org, linux-cxl@vger.kernel.org, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/2] ACPI: NUMA: Apply SRAT proximity domain to entire CFMWS window Date: Thu, 18 May 2023 17:04:56 -0700 Message-Id: X-Mailer: git-send-email 2.39.2 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org From: Alison Schofield Commit fd49f99c1809 ("ACPI: NUMA: Add a node and memblk for each CFMWS not in SRAT") did not account for the case where the BIOS only partially describes a CFMWS Window in the SRAT. That means the omitted address ranges, of a partially described CFMWS Window, do not get assigned to a NUMA node. Replace the call to phys_to_target_node() with numa_add_memblks(). Numa_add_memblks() searches an HPA range for existing memblk(s) and extends those memblk(s) to fill the entire CFMWS Window. Extending the existing memblks is a simple strategy that reuses SRAT defined proximity domains from part of a window to fill out the entire window, based on the knowledge* that all of a CFMWS window is of a similar performance class. *Note that this heuristic will evolve when CFMWS Windows present a wider range of characteristics. The extension of the proximity domain, implemented here, is likely a step in developing a more sophisticated performance profile in the future. There is no change in behavior when the SRAT does not describe the CFMWS Window at all. In that case, a new NUMA node with a single memblk covering the entire CFMWS Window is created. Fixes: fd49f99c1809 ("ACPI: NUMA: Add a node and memblk for each CFMWS not in SRAT") Signed-off-by: Alison Schofield --- drivers/acpi/numa/srat.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/acpi/numa/srat.c b/drivers/acpi/numa/srat.c index 1f4fc5f8a819..12f330b0eac0 100644 --- a/drivers/acpi/numa/srat.c +++ b/drivers/acpi/numa/srat.c @@ -310,11 +310,16 @@ static int __init acpi_parse_cfmws(union acpi_subtable_headers *header, start = cfmws->base_hpa; end = cfmws->base_hpa + cfmws->window_size; - /* Skip if the SRAT already described the NUMA details for this HPA */ - node = phys_to_target_node(start); - if (node != NUMA_NO_NODE) + /* + * The SRAT may have already described NUMA details for all, + * or a portion of, this CFMWS HPA range. Extend the memblks + * found for any portion of the window to cover the entire + * window. + */ + if (!numa_fill_memblks(start, end)) return 0; + /* No SRAT description. Create a new node. */ node = acpi_map_pxm_to_node(*fake_pxm); if (node == NUMA_NO_NODE) {