From mboxrd@z Thu Jan 1 00:00:00 1970 From: 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> Return-path: Sender: linux-efi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Dave Young Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-acpi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, kexec-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, "Rafael J . Wysocki" , Josh Triplett , Borislav Petkov , Matthew Garrett , Vivek Goyal , Matt Fleming List-Id: linux-efi@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.GA2961-0VdLhd/A9Pl+NNSt+8eSiB/sF2h8X+2i0E9HWUfgJXw@public.gmane.org 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