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authorColin Ian King <colin.king@canonical.com>2016-01-21 20:05:47 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-03-10 01:46:07 +0300
commitb2ca5dae31d61c4610ea3228f43f7cc66312897c (patch)
treef51780882162e90706be785ca9b7057854577e0f /drivers/acpi/tables.c
parent75829dcf10862966f52716f2d67ac1c1b1eb486b (diff)
downloadlinux-b2ca5dae31d61c4610ea3228f43f7cc66312897c.tar.xz
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>
Diffstat (limited to 'drivers/acpi/tables.c')
-rw-r--r--drivers/acpi/tables.c10
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);