From patchwork Mon Feb 6 01:02:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Williams X-Patchwork-Id: 650998 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 5F992C63797 for ; Mon, 6 Feb 2023 01:02:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229521AbjBFBCy (ORCPT ); Sun, 5 Feb 2023 20:02:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53144 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229523AbjBFBCx (ORCPT ); Sun, 5 Feb 2023 20:02:53 -0500 Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 08BF48A71; Sun, 5 Feb 2023 17:02:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1675645372; x=1707181372; h=subject:from:to:cc:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=yszGLPkFMXedVGllSqe6JjeO5D0jX4yLcgUfwilZAzI=; b=FTdgOzxiK/n8EQrct1NKXny2jtk1ViZwiVEpgp9OZkPYE4CXUjZBJSUj VZqMuRxyEbtehyZ11M36/P/r7n4tsbt9qu/15yhULYXKG+d0NwadZA5uE SM+sw2ibRu3KiXXkjtyL6zw95dwgLgx/KWw2mmruy7mpKlYo5yO/RQ931 Z1TkR8raZZ56FFpisyDfzoUnARRtGBkVagXqkbGJE0jhqf899RhjZMwSl PAz64pP9vJ7oILUYmdcQ/JfH3g6hgKj8YfEyejrG04X1WngqADCNrvHQe 8P1ktKEjs18+ZoWNCYjnZ9s2rjiUuqdvRREd76PUOnofiVCkEWeAWO4Ow Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10612"; a="331243798" X-IronPort-AV: E=Sophos;i="5.97,276,1669104000"; d="scan'208";a="331243798" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Feb 2023 17:02:51 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10612"; a="643855741" X-IronPort-AV: E=Sophos;i="5.97,276,1669104000"; d="scan'208";a="643855741" Received: from mkrysak-mobl.amr.corp.intel.com (HELO dwillia2-xfh.jf.intel.com) ([10.212.255.187]) by orsmga006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Feb 2023 17:02:51 -0800 Subject: [PATCH 04/18] cxl/region: Validate region mode vs decoder mode 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 17:02:51 -0800 Message-ID: <167564537131.847146.9020072654741860107.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 In preparation for a new region mode, do not, for example, allow 'ram' decoders to be assigned to 'pmem' regions and vice versa. Signed-off-by: Dan Williams Reviewed-by: Gregory Price Reviewed-by: Dave Jiang Reviewed-by: Vishal Verma --- drivers/cxl/core/region.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c index c9e7f05caa0f..53d6dbe4de6d 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -1217,6 +1217,12 @@ static int cxl_region_attach(struct cxl_region *cxlr, struct cxl_dport *dport; int i, rc = -ENXIO; + if (cxled->mode != cxlr->mode) { + dev_dbg(&cxlr->dev, "%s region mode: %d mismatch: %d\n", + dev_name(&cxled->cxld.dev), cxlr->mode, cxled->mode); + return -EINVAL; + } + if (cxled->mode == CXL_DECODER_DEAD) { dev_dbg(&cxlr->dev, "%s dead\n", dev_name(&cxled->cxld.dev)); return -ENODEV;