Commit b2ca5dae authored by Colin Ian King's avatar Colin Ian King Committed by Rafael J. Wysocki
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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.


Signed-off-by: default avatarColin Ian King <>
Signed-off-by: default avatarRafael J. Wysocki <>
parent 75829dcf
......@@ -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.
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
......@@ -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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