ACPI / CPPC: Add support for functional fixed hardware address

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The CPPC registers can also be accessed via functional fixed hardware
addresse(FFH) in X86. Add support by modifying cpc_read and cpc_write to
be able to read/write MSRs on x86 platform on per cpu basis.
Also with this change, acpi_cppc_processor_probe doesn't bail out if
address space id is not equal to PCC or memory address space and FFH
is supported on the system.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

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This commit is contained in:

Srinivas Pandruvada 2016-09-01 13:37:10 -07:00 • committed by Rafael J. Wysocki

parent 5448f14698

commit a6cbcdd5ab

3 changed files with 121 additions and 13 deletions

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1

arch/x86/kernel/acpi/Makefile

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58

arch/x86/kernel/acpi/cppc_msr.c

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75

drivers/acpi/cppc_acpi.c

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