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The processor _OSC method is already used for a workaround introduced
in commit a21211672c ("ACPI / processor: Request native thermal
interrupt handling via _OSC"), but in accordance with ACPI 6.5 (and
earlier), it should be used for negotiating all of the processor
capabilities instead of _PDC (which has been deprecated since ACPI 3.0
and got removed from ACPI 6.5 entirely).
Create a new callback function called acpi_processor_osc() to be invoked
for every processor object and processor device in the ACPI namespace, in
analogy with the already existing acpi_hwp_native_thermal_lvt_osc().
Make this function implement the workaround mentioned above and convey
all of the OSPM processor support information to the platform firmware
by setting all of the appropriate processor capabilities bits before
evaluating _OSC for the given processor. For this purpose, make it
call arch_acpi_set_proc_cap_bits() and modify the latter to set
ACPI_PROC_CAP_COLLAB_PROC_PERF along with the other processor
capabilities bits.
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, whitespace fixup ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
41 lines
1.4 KiB
C
41 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Vendor specific processor capabilities bit definition
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* for Intel processors. Those bits are used to convey OSPM
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* power management capabilities to the platform.
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*/
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#ifndef __PROC_CAP_INTEL_H__
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#define __PROC_CAP_INTEL_H__
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#define ACPI_PROC_CAP_P_FFH (0x0001)
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#define ACPI_PROC_CAP_C_C1_HALT (0x0002)
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#define ACPI_PROC_CAP_T_FFH (0x0004)
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#define ACPI_PROC_CAP_SMP_C1PT (0x0008)
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#define ACPI_PROC_CAP_SMP_C2C3 (0x0010)
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#define ACPI_PROC_CAP_SMP_P_SWCOORD (0x0020)
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#define ACPI_PROC_CAP_SMP_C_SWCOORD (0x0040)
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#define ACPI_PROC_CAP_SMP_T_SWCOORD (0x0080)
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#define ACPI_PROC_CAP_C_C1_FFH (0x0100)
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#define ACPI_PROC_CAP_C_C2C3_FFH (0x0200)
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#define ACPI_PROC_CAP_SMP_P_HWCOORD (0x0800)
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#define ACPI_PROC_CAP_COLLAB_PROC_PERF (0x1000)
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#define ACPI_PROC_CAP_EST_CAPABILITY_SMP (ACPI_PROC_CAP_SMP_C1PT | \
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ACPI_PROC_CAP_C_C1_HALT | \
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ACPI_PROC_CAP_P_FFH)
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#define ACPI_PROC_CAP_EST_CAPABILITY_SWSMP (ACPI_PROC_CAP_SMP_C1PT | \
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ACPI_PROC_CAP_C_C1_HALT | \
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ACPI_PROC_CAP_SMP_P_SWCOORD | \
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ACPI_PROC_CAP_SMP_P_HWCOORD | \
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ACPI_PROC_CAP_P_FFH)
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#define ACPI_PROC_CAP_C_CAPABILITY_SMP (ACPI_PROC_CAP_SMP_C2C3 | \
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ACPI_PROC_CAP_SMP_C1PT | \
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ACPI_PROC_CAP_C_C1_HALT | \
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ACPI_PROC_CAP_C_C1_FFH | \
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ACPI_PROC_CAP_C_C2C3_FFH)
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#endif /* __PROC_CAP_INTEL_H__ */
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