From patchwork Mon Feb 6 01:03:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Williams X-Patchwork-Id: 13129250 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 64493C6379F for ; Mon, 6 Feb 2023 01:03:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229536AbjBFBDZ (ORCPT ); Sun, 5 Feb 2023 20:03:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53312 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229517AbjBFBDY (ORCPT ); Sun, 5 Feb 2023 20:03:24 -0500 Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AB28A144B8; Sun, 5 Feb 2023 17:03:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1675645403; x=1707181403; h=subject:from:to:cc:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=1wW75nbCrf3Mo9olc/rXs6RitxwA0HhPGRVwUk3MkpQ=; b=cdOXogEpJQ4b9DkUVRe1uYinj//tFtgvOE5QcSTD1vu/IVKOXL+gzj9/ CvyzAiFU73EqSyw8XwG33BVTDiNtb4QUJ5HPSIVnmRrOPFp+6kLOJ4pAj y1acNyf7qWYTzzURDoI6Fjia0qRMZUUSSZ0Xad01zkUj6Z8/if/nmhSW9 J3XOQQCv92VXD0RPjsx4fPGu6dpXeERvKZI3Gl/GHlDKnRqsNO/FUKxJ5 t0O9lJJw8/4s9g7UeIBRX+MAf7ixNUukW6HP72hjH35VKGJP76zJxRfjj Y1GcvQXGi43QvKVevNqGadQ7XJWW14tfgYfToFLCq8sw5K8mBJYMJudVj Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10612"; a="312763209" X-IronPort-AV: E=Sophos;i="5.97,276,1669104000"; d="scan'208";a="312763209" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Feb 2023 17:03:19 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10612"; a="616291323" X-IronPort-AV: E=Sophos;i="5.97,276,1669104000"; d="scan'208";a="616291323" Received: from mkrysak-mobl.amr.corp.intel.com (HELO dwillia2-xfh.jf.intel.com) ([10.212.255.187]) by orsmga003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Feb 2023 17:03:19 -0800 Subject: [PATCH 09/18] cxl/region: Enable CONFIG_CXL_REGION to be toggled From: Dan Williams To: linux-cxl@vger.kernel.org Cc: dave.hansen@linux.intel.com, linux-mm@kvack.org, linux-acpi@vger.kernel.org Date: Sun, 05 Feb 2023 17:03:18 -0800 Message-ID: <167564539875.847146.16213498614174558767.stgit@dwillia2-xfh.jf.intel.com> In-Reply-To: <167564534874.847146.5222419648551436750.stgit@dwillia2-xfh.jf.intel.com> References: <167564534874.847146.5222419648551436750.stgit@dwillia2-xfh.jf.intel.com> User-Agent: StGit/0.18-3-g996c MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Add help text and a label so the CXL_REGION config option can be toggled. This is mainly to enable compile testing without region support. Signed-off-by: Dan Williams Reviewed-by: Gregory Price Reviewed-by: Jonathan Cameron Reviewed-by: Vishal Verma --- drivers/cxl/Kconfig | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/cxl/Kconfig b/drivers/cxl/Kconfig index 0ac53c422c31..163c094e67ae 100644 --- a/drivers/cxl/Kconfig +++ b/drivers/cxl/Kconfig @@ -104,12 +104,22 @@ config CXL_SUSPEND depends on SUSPEND && CXL_MEM config CXL_REGION - bool + bool "CXL: Region Support" default CXL_BUS # For MAX_PHYSMEM_BITS depends on SPARSEMEM select MEMREGION select GET_FREE_REGION + help + Enable the CXL core to enumerate and provision CXL regions. A CXL + region is defined by one or more CXL expanders that decode a given + system-physical address range. For CXL regions established by + platform-firmware this option enables memory error handling to + identify the devices participating in a given interleaved memory + range. Otherwise, platform-firmware managed CXL is enabled by being + placed in the system address map and does not need a driver. + + If unsure say 'y' config CXL_REGION_INVALIDATION_TEST bool "CXL: Region Cache Management Bypass (TEST)"