From: Matt Fleming <matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
To: Dave Young <dyoung-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
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"
<rafael.j.wysocki-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Josh Triplett <josh-iaAMLnmF4UmaiuxdJuQwMA@public.gmane.org>,
Borislav Petkov <bp-Gina5bIWoIWzQB+pC5nmwQ@public.gmane.org>,
Matthew Garrett <mjg59-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>,
Vivek Goyal <vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Matt Fleming
<matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
Subject: [PATCH 0/2] ACPI, x86/efi: Remove ACPI BGRT tables for kexec
Date: Wed, 17 Feb 2016 15:45:08 +0000 [thread overview]
Message-ID: <1455723910-16710-1-git-send-email-matt@codeblueprint.co.uk> (raw)
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
next reply other threads:[~2016-02-17 15:45 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-17 15:45 Matt Fleming [this message]
2016-02-17 15:45 ` [PATCH 1/2] ACPICA: Tables: Add function to remove ACPI tables Matt Fleming
2016-02-18 2:34 ` Zheng, Lv
2016-02-18 20:15 ` Rafael J. Wysocki
2016-02-18 20:41 ` Matt Fleming
2016-02-18 20:45 ` Rafael J. Wysocki
[not found] ` <20160218204123.GA17042-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
2016-02-19 3:19 ` Zheng, Lv
[not found] ` <1455723910-16710-1-git-send-email-matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
2016-02-17 15:45 ` [PATCH 2/2] x86/efi: Delete ACPI BGRT when booting via kexec Matt Fleming
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