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 <colin.king@canonical.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 10 insertions, 0 deletions

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);