Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932117AbbFATMi (ORCPT ); Mon, 1 Jun 2015 15:12:38 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:38808 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751792AbbFATMa (ORCPT ); Mon, 1 Jun 2015 15:12:30 -0400 From: "Jonathan (Zhixiong) Zhang" To: Matt Fleming , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , x86@kernel.org, leif.lindholm@linaro.org, al.stone@linaro.org, fu.wei@linaro.org, rjw@rjwysocki.net, lenb@kernel.org, ying.huang@intel.com 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, vgandhi@codeaurora.org Subject: [PATCH V2 0/3] map GHES memory region with EFI memory map Date: Mon, 1 Jun 2015 12:12:17 -0700 Message-Id: <1433185940-24770-1-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: 1737 Lines: 44 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 cacahed 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 at runtime. Since both arch/x86 and arc/ia64 implemented architecture agnostic EFI memory map attribue lookup function efi_memattributes(), the code is moved from arch/x86 and arch/ia64 into EFI subsystem. On top of that, efi_remap() is added. V2: 1. Rebased to v4.1-rc5. 2. Split removal of efi_mem_attributes() and creation of efi_ioremap() into two patches. Jonathan (Zhixiong) Zhang (3): efi: arch, x86: arch, ia64: move efi_mem_attributes() efi: add efi_remap() 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/