| Message ID | 1453395947-1567-1-git-send-email-colin.king@canonical.com (mailing list archive) |
|---|---|
| State | Accepted, archived |
| Delegated to: | Rafael Wysocki |
| Headers | show |
On Thursday, January 21, 2016 05:05:47 PM Colin King wrote: > From: Colin Ian King <colin.king@canonical.com> > > BugLink: https://bugs.launchpad.net/bugs/1529381 > > 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: Colin Ian King <colin.king@canonical.com> I've queued this up for 4.6 with some minor changes in the subject/changelog. Thanks, Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 3ea869d..3782024 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -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 diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c index 6c0f079..ebdf564 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);