From b2ca5dae31d61c4610ea3228f43f7cc66312897c Mon Sep 17 00:00:00 2001 From: Colin Ian King Date: Thu, 21 Jan 2016 17:05:47 +0000 Subject: ACPI: Add acpi_force_32bit_fadt_addr option to force 32 bit FADT addresses 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 Signed-off-by: Rafael J. Wysocki --- drivers/acpi/tables.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'drivers/acpi/tables.c') diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c index 6c0f0794aa82..ebdf5643cd8e 100644 --- a/drivers/acpi/tables.c +++ b/drivers/acpi/tables.c @@ -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); -- cgit v1.2.3