From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1424040AbcBQPpR (ORCPT ); Wed, 17 Feb 2016 10:45:17 -0500 Received: from mail-wm0-f44.google.com ([74.125.82.44]:35030 "EHLO mail-wm0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1422745AbcBQPpN (ORCPT ); Wed, 17 Feb 2016 10:45:13 -0500 From: Matt Fleming To: Dave Young Cc: linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org, linux-acpi@vger.kernel.org, kexec@lists.infradead.org, "Rafael J . Wysocki" , Josh Triplett , Borislav Petkov , Matthew Garrett , Vivek Goyal , Matt Fleming Subject: [PATCH 0/2] ACPI, x86/efi: Remove ACPI BGRT tables for kexec Date: Wed, 17 Feb 2016 15:45:08 +0000 Message-Id: <1455723910-16710-1-git-send-email-matt@codeblueprint.co.uk> X-Mailer: git-send-email 2.6.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Based on Dave's report that the BGRT image regions are being accessed on kexec reboot (which by that time contain garbage), https://lkml.kernel.org/r/20160127112044.GA2961@dhcp-128-65.nay.redhat.com the following patches simply delete the table when doing a kexec boot. This is part of a wider compaign to stop kexec-specific code from leaking into all parts of arch/x86. Instead of sprinkling "if (efi_setup)", kexec should be shaping the platform information to more accurately describe which features are still available, so that existing drivers work transparently without kexec quirks. Matt Fleming (2): ACPICA: Tables: Add function to remove ACPI tables x86/efi: Delete ACPI BGRT when booting via kexec arch/x86/include/asm/efi.h | 1 + arch/x86/kernel/setup.c | 4 +++- arch/x86/platform/efi/efi.c | 38 ++++++++++++++++++++++++++++++ drivers/acpi/acpica/tbxface.c | 54 +++++++++++++++++++++++++++++++++++++++++++ include/acpi/acpixf.h | 3 +++ 5 files changed, 99 insertions(+), 1 deletion(-) -- 2.6.2