From patchwork Fri Sep 6 14:24:43 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "lan,Tianyu" X-Patchwork-Id: 2854550 Return-Path: X-Original-To: patchwork-linux-acpi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 02AE69F499 for ; Fri, 6 Sep 2013 16:46:16 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5C02D20292 for ; Fri, 6 Sep 2013 16:46:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 28CAD20121 for ; Fri, 6 Sep 2013 16:46:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753314Ab3IFOZr (ORCPT ); Fri, 6 Sep 2013 10:25:47 -0400 Received: from mga02.intel.com ([134.134.136.20]:41089 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753127Ab3IFOZq (ORCPT ); Fri, 6 Sep 2013 10:25:46 -0400 Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga101.jf.intel.com with ESMTP; 06 Sep 2013 07:25:45 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.90,854,1371106800"; d="scan'208";a="399392311" Received: from unknown (HELO localhost) ([10.255.20.213]) by orsmga002.jf.intel.com with ESMTP; 06 Sep 2013 07:25:41 -0700 From: Lan Tianyu To: tianyu.lan@intel.com, lenb@kernel.org, rjw@sisk.pl, yinghai@kernel.org, bhelgaas@google.com, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH 1/4] ACPI/Resource: Add memory prefetch check support Date: Fri, 6 Sep 2013 10:24:43 -0400 Message-Id: <1378477486-8758-2-git-send-email-tianyu.lan@intel.com> X-Mailer: git-send-email 1.8.2.1 In-Reply-To: <1378477486-8758-1-git-send-email-tianyu.lan@intel.com> References: <1378477486-8758-1-git-send-email-tianyu.lan@intel.com> Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Spam-Status: No, score=-9.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch is to check mem address space's acpi resource caching ability and set prefetch flag of struct resource if it's prefetchable. Signed-off-by: Lan Tianyu --- drivers/acpi/resource.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c index b7201fc..929f416 100644 --- a/drivers/acpi/resource.c +++ b/drivers/acpi/resource.c @@ -202,6 +202,9 @@ bool acpi_dev_resource_address_space(struct acpi_resource *ares, res->flags = acpi_dev_memresource_flags(len, addr.info.mem.write_protect, window); + + if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY) + res->flags |= IORESOURCE_PREFETCH; break; case ACPI_IO_RANGE: io_decode = addr.granularity == 0xfff ?