[PATCH 0/2] ACPI, x86/efi: Remove ACPI BGRT tables for kexec
Matt Fleming
matt at codeblueprint.co.uk
Wed Feb 17 07:45:08 PST 2016
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
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