ACPI: Add acpi_force_32bit_fadt_addr option to force 32 bit FADT addresses (b2ca5dae) · Commits · 戴 / test

Some HP laptops seem to have invalid 64 bit FADT X_PM* addresses which are causing various boot issues. In these cases, it would be useful to force ACPI to use the valid legacy 32 bit equivalent PM addresses. Add a acpi_force_32bit_fadt_addr to set the ACPICA acpi_gbl_use32_bit_fadt_addresses to TRUE to force this override. Link: https://bugs.launchpad.net/bugs/1529381 Signed-off-by:

Colin Ian King <colin.king@canonical.com> Signed-off-by:

Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Documentation/kernel-parameters.txt

+6 −0

Original line number	Diff line number	Diff line
		@@ -193,6 +193,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
		(e.g. thinkpad_acpi, sony_acpi, etc.) instead
		of the ACPI video.ko driver.

		acpi_force_32bit_fadt_addr
		force FADT to use 32 bit addresses rather than the
		64 bit X_* addresses. Some firmware have broken 64
		bit addresses for force ACPI ignore these and use
		the older legacy 32 bit addresses.

		acpica_no_return_repair [HW, ACPI]
		Disable AML predefined validation mechanism
		This mechanism can repair the evaluation result to make

drivers/acpi/tables.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -484,3 +484,13 @@ static int __init acpi_force_table_verification_setup(char *s)
		}

		early_param("acpi_force_table_verification", acpi_force_table_verification_setup);

		static int __init acpi_force_32bit_fadt_addr(char *s)
		{
		pr_info("Forcing 32 Bit FADT addresses\n");
		acpi_gbl_use32_bit_fadt_addresses = TRUE;

		return 0;
		}

		early_param("acpi_force_32bit_fadt_addr", acpi_force_32bit_fadt_addr);

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