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ACPI: Add acpi_force_32bit_fadt_addr option to force 32 bit FADT addresses

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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>
This commit is contained in:
Colin Ian King 2016-01-21 17:05:47 +00:00 committed by Rafael J. Wysocki
parent 75829dcf10
commit b2ca5dae31
2 changed files with 16 additions and 0 deletions
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6
Documentation/kernel-parameters.txt
View File

@ -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.
acpi_force_32bit_fadt_addr
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

10
drivers/acpi/tables.c
View File

@ -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);