From patchwork Sat Jun 24 23:42:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alison Schofield X-Patchwork-Id: 13291786 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 1E5EFEB64DD for ; Sat, 24 Jun 2023 23:42:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230345AbjFXXma (ORCPT ); Sat, 24 Jun 2023 19:42:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54232 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230320AbjFXXma (ORCPT ); Sat, 24 Jun 2023 19:42:30 -0400 Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 527F410F4; Sat, 24 Jun 2023 16:42:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1687650149; x=1719186149; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=pExp2WMXGyNpxCyGDYOXewD2SNqta6zQBIAwkyT6MEY=; b=doSItpwr7Zbw0ZO15POJpg475rPZNhJuT0L2TXPLvEirU2ajHhTT5Qkj febdvReYSJxXhsVy7YaFgE2glg5TvGRpBtAc2w6PjbJyKNB6ytE0PceiK RiE94cOvYOjkUFU5JVQssoBFlwe2eyHPUK5sl8RPTFQoGhQRWtVnHU9rx mJ6ZCMpXZAIhg/mZB+8PsDCWt6pGgqqYoj1tAo2fHafJWMkzNy2sqrO8O vGkN4wieGZDEgFBL+kigkjbveQfbKnkq++nbc59YxIGFhgK8E+u6cLJaM nHRKjf81iaQD96Kms16oZKdR3hjKP2DPgPd2LaEfFfFIlxqLMllo0Xz5n A==; X-IronPort-AV: E=McAfee;i="6600,9927,10751"; a="391123107" X-IronPort-AV: E=Sophos;i="6.01,156,1684825200"; d="scan'208";a="391123107" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jun 2023 16:42:28 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10751"; a="839839598" X-IronPort-AV: E=Sophos;i="6.01,156,1684825200"; d="scan'208";a="839839598" Received: from aschofie-mobl2.amr.corp.intel.com (HELO localhost) ([10.209.113.117]) by orsmga004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jun 2023 16:42:28 -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 , Mike Rapoport Cc: Alison Schofield , x86@kernel.org, linux-cxl@vger.kernel.org, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, Derick Marks Subject: [PATCH v3 2/2] ACPI: NUMA: Apply SRAT proximity domain to entire CFMWS window Date: Sat, 24 Jun 2023 16:42:24 -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") Reported-by: Derick Marks Suggested-by: Dan Williams Signed-off-by: Alison Schofield Tested-by: Derick Marks --- 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) {