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| author | Colin Ian King <colin.king@canonical.com> | 2016-01-21 20:05:47 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-03-10 01:46:07 +0300 |
| commit | b2ca5dae31d61c4610ea3228f43f7cc66312897c (patch) | |
| tree | f51780882162e90706be785ca9b7057854577e0f /drivers/acpi/tables.c | |
| parent | 75829dcf10862966f52716f2d67ac1c1b1eb486b (diff) | |
| download | linux-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.c | 10 |
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); |