Commit 0ea61381 authored Jul 01, 2015 by Lv Zheng Committed by Rafael J. Wysocki Jul 01, 2015

ACPICA: Tables: Enable default 64-bit FADT addresses favor

ACPICA commit 4da56eeae0749dfe8491285c1e1fad48f6efafd8

The following commit temporarily disables correct 64-bit FADT addresses
favor during the period the root cause of the bug is not fixed:
 Commit: 85dbd580
 ACPICA: Tables: Restore old behavor to favor 32-bit FADT addresses.

With enough protections, this patch re-enables 64-bit FADT addresses by
default. If regressions are reported against such change, this patch should
be bisected and reverted.
Note that 64-bit FACS favor and 64-bit firmware waking vector favor are
excluded by this commit in order not to break OSPMs. Lv Zheng.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=74021
Link: https://github.com/acpica/acpica/commit/4da56eea


Cc: 3.15.1+ <stable@vger.kernel.org> # 3.15.1+
Reported-and-tested-by: Oswald Buddenhagen <ossi@kde.org>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

parent c04be184

include/acpi/acpixf.h

+2 −2

Original line number	Diff line number	Diff line
		@@ -195,9 +195,9 @@ ACPI_INIT_GLOBAL(u8, acpi_gbl_do_not_use_xsdt, FALSE);
		* address. Although ACPICA adheres to the ACPI specification which
		* requires the use of the corresponding 64-bit address if it is non-zero,
		* some machines have been found to have a corrupted non-zero 64-bit
		* address. Default is TRUE, favor the 32-bit addresses.
		* address. Default is FALSE, do not favor the 32-bit addresses.
		*/
		ACPI_INIT_GLOBAL(u8, acpi_gbl_use32_bit_fadt_addresses, TRUE);
		ACPI_INIT_GLOBAL(u8, acpi_gbl_use32_bit_fadt_addresses, FALSE);

		/*
		* Optionally use 32-bit FACS table addresses.

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