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 at 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
