diff options
| author | Michal Wilczynski <michal.wilczynski@intel.com> | 2023-07-10 17:03:36 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2023-07-17 14:47:18 +0200 |
| commit | 95272641338a32734792fe4b261001847b11ed80 (patch) | |
| tree | e5415644cf4eff1445aef2b1f56920b5a284d91d /drivers/acpi/bus.c | |
| parent | 5ba30be7fd6e3fdff1e0b01f24173a5e6a3183b2 (diff) | |
| download | lwn-95272641338a32734792fe4b261001847b11ed80.tar.gz lwn-95272641338a32734792fe4b261001847b11ed80.zip | |
ACPI: processor: Use _OSC to convey OSPM processor support information
Change acpi_early_processor_osc() to return a value in case of a
failure and make it static.
Also make it run acpi_processor_osc() for every processor object or
processor device found in the ACPI Namespace (previously, its only purpose
was to work around platform firmware defects on Skylake systems).
Introduce a new function called acpi_early_processor_control_setup() that
will invoke acpi_early_processor_osc() first in order to convey the OS
processor support information to the platform firmware and if that fails,
it will fall back to using _PDC.
Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Michal Wilczynski <michal.wilczynski@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
[ rjw: Subject and changelog edits, change function return value to bool,
add missing 'static', change messages ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/bus.c')
| -rw-r--r-- | drivers/acpi/bus.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index 2fc2b43a4ed3..a39f2f3a2cd6 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -1296,9 +1296,6 @@ static int __init acpi_bus_init(void) goto error1; } - /* Set capability bits for _OSC under processor scope */ - acpi_early_processor_osc(); - /* * _OSC method may exist in module level code, * so it must be run after ACPI_FULL_INITIALIZATION @@ -1314,7 +1311,7 @@ static int __init acpi_bus_init(void) acpi_sysfs_init(); - acpi_early_processor_set_pdc(); + acpi_early_processor_control_setup(); /* * Maybe EC region is required at bus_scan/acpi_get_devices. So it |