Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752603AbbEDVCv (ORCPT ); Mon, 4 May 2015 17:02:51 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:51618 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751741AbbEDVCm (ORCPT ); Mon, 4 May 2015 17:02:42 -0400 From: "Jonathan (Zhixiong) Zhang" To: Matt Fleming , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , x86@kernel.org Cc: "Jonathan (Zhixiong) Zhang" , linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arm-msm@vger.kernel.org, linaro-acpi@lists.linaro.org Subject: [PATCH 0/2] map GHES memory region with EFI memory map Date: Mon, 4 May 2015 14:02:13 -0700 Message-Id: <1430773335-22897-1-git-send-email-zjzhang@codeaurora.org> X-Mailer: git-send-email 1.8.2.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1541 Lines: 35 From: "Jonathan (Zhixiong) Zhang" On a platform with APEI (ACPI Platform Error Interface) enabled, firmware updates a memory region with hardware error record using nocache attribute. When OS reads the region, since it maps the region with cache attribute even though EFI memory map defines this region as uncached, OS gets stale data and errorneously reports there is no new HW error. When ghes driver maps the memory region, it uses the cache attribute according to EFI memory map, if EFI memory map feature is enabled. Since both arch/x86 and arc/ia64 implemented architecture agnostic EFI memory map attribue lookup function, the code is moved from arch/x86 and arch/ia64 into EFI subsystem. Jonathan (Zhixiong) Zhang (2): efi: arch, x86: arch, ia64: rearrange EFI memmap related functions acpi, apei: use EFI memmap to map GHES memory arch/ia64/kernel/efi.c | 11 ----------- arch/x86/platform/efi/efi.c | 18 ------------------ drivers/acpi/apei/ghes.c | 13 +++++++++++++ drivers/firmware/efi/efi.c | 27 +++++++++++++++++++++++++++ include/linux/efi.h | 1 + 5 files changed, 41 insertions(+), 29 deletions(-) -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/