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| author | Octavian Purdila <octavian.purdila@intel.com> | 2016-07-08 19:13:12 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-07-08 21:52:35 +0200 |
| commit | 475fb4e8b2f4444d1d7b406ff3a7d21bc89a1e6f (patch) | |
| tree | 25deca4b6de41e23d3d8abe44c6f6b94493d50f8 /Documentation/kernel-parameters.txt | |
| parent | 7f24467f3b357ab6abc146c47fcedd7d57a189b6 (diff) | |
| download | linux-475fb4e8b2f4444d1d7b406ff3a7d21bc89a1e6f.tar.bz2 | |
efi / ACPI: load SSTDs from EFI variables
This patch allows SSDTs to be loaded from EFI variables. It works by
specifying the EFI variable name containing the SSDT to be loaded. All
variables with the same name (regardless of the vendor GUID) will be
loaded.
Note that we can't use acpi_install_table and we must rely on the
dynamic ACPI table loading and bus re-scanning mechanisms. That is
because I2C/SPI controllers are initialized earlier then the EFI
subsystems and all I2C/SPI ACPI devices are enumerated when the
I2C/SPI controllers are initialized.
Signed-off-by: Octavian Purdila <octavian.purdila@intel.com>
Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'Documentation/kernel-parameters.txt')
| -rw-r--r-- | Documentation/kernel-parameters.txt | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 82b42c958d1c..bbfb56fe7b92 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1185,6 +1185,13 @@ bytes respectively. Such letter suffixes can also be entirely omitted. Address Range Mirroring feature even if your box doesn't support it. + efivar_ssdt= [EFI; X86] Name of an EFI variable that contains an SSDT + that is to be dynamically loaded by Linux. If there are + multiple variables with the same name but with different + vendor GUIDs, all of them will be loaded. See + Documentation/acpi/ssdt-overlays.txt for details. + + eisa_irq_edge= [PARISC,HW] See header of drivers/parisc/eisa.c. |