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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 <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
This commit is contained in:
Colin Ian King 2016-01-21 17:05:47 +00:00 • committed by Rafael J. Wysocki
commit b2ca5dae31
2 changed files with 16 additions and 0 deletions
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10
drivers/acpi/tables.c
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@ -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);