linux/drivers/acpi/acpi_processor.c, branch v4.5

ACPI: Add weak routines for ACPI CPU Hotplug

2015-10-12T21:08:03Z

Add weak functions for architectures which do not support hot-adding and removing CPUs which aren't detected at bootup. (e.g. via MADT). This helps preserve the Kconfig dependency from: commit cbfc1bae55bb ("[ACPI] ACPI_HOTPLUG_CPU Kconfig dependency update") prevent: HOTPLUG_CPU=y ACPI_PROCESSOR=y ACPI_HOTPLUG_CPU=n Signed-off-by: Ashwin Chaugule Signed-off-by: Rafael J. Wysocki

ACPI / processor: remove leftover __refdata annotations

2015-07-20T23:01:46Z

The processor_handler structure does not reference any __init / __exit code or data. Therefore the __refdata annotation is not needed. It used to be prior to commit fe7bf106ebc2 ("acpi: delete __cpuinit usage from all acpi files") due to the __cpuinit annotation of acpi_processor_add(). But with that commit in place that requirement has gone. The same is true for the acpi_cpu_notifier notifier block. acpi_cpu_soft_notify() used to be marked __cpuinit but lost its annotation in the above mentioned commit as well. Therefore the __refdata annotation isn't needed there either. Just drop the unneded __refdata annotations to be able to catch future section mismatches. Signed-off-by: Mathias Krause Signed-off-by: Rafael J. Wysocki

ACPI / processor: Introduce invalid_phys_cpuid()

2015-05-13T21:28:16Z

Introduce invalid_phys_cpuid() to identify cpu with invalid physical ID, then used it as replacement of the direct comparisons with PHYS_CPUID_INVALID. Signed-off-by: Hanjun Guo Signed-off-by: Rafael J. Wysocki

ACPI / processor: remove phys_id in acpi_processor_get_info()

2015-05-13T21:28:15Z

Use pr->phys_id to replace phys_id to simplify the code. Signed-off-by: Hanjun Guo Signed-off-by: Rafael J. Wysocki

ACPI / processor: remove cpu_index in acpi_processor_get_info()

2015-05-13T21:28:15Z

Just use pr->id instead of cpu_index to simplify the code. Signed-off-by: Hanjun Guo Signed-off-by: Rafael J. Wysocki

ACPI / processor: Introduce invalid_logical_cpuid()

2015-05-13T21:28:14Z

In ACPI processor drivers, we use direct comparisons of cpu logical id with -1 which are error prone in case logical cpuid is accidentally assinged an error code and prevents us from returning an error-encoding cpuid directly in some cases. So introduce invalid_logical_cpuid() to identify cpu with invalid logical cpu num, then it will be used to replace the direct comparisons with -1. Signed-off-by: Hanjun Guo Signed-off-by: Rafael J. Wysocki

ACPI / processor: Introduce phys_cpuid_t for CPU hardware ID

2015-03-26T15:12:51Z

CPU hardware ID (phys_id) is defined as u32 in structure acpi_processor, but phys_id is used as int in acpi processor driver, so it will lead to some inconsistence for the drivers. Furthermore, to cater for ACPI arch ports that implement 64 bits CPU ids a generic CPU physical id type is required. So introduce typedef u32 phys_cpuid_t in a common file, and introduce a macro PHYS_CPUID_INVALID as (phys_cpuid_t)(-1) if it's not defined by other archs, this will solve the inconsistence in acpi processor driver, and will prepare for the ACPI on ARM64 for the 64 bit CPU hardware ID in the following patch. CC: Rafael J Wysocki Suggested-by: Lorenzo Pieralisi Reviewed-by: Grant Likely Acked-by: Sudeep Holla Acked-by: Lorenzo Pieralisi Acked-by: Rafael J. Wysocki Signed-off-by: Catalin Marinas [hj: reworked cpu physid map return codes] Signed-off-by: Hanjun Guo Signed-off-by: Will Deacon

ACPI / processor: Rename acpi_(un)map_lsapic() to acpi_(un)map_cpu()

2015-01-05T22:34:26Z

acpi_map_lsapic() will allocate a logical CPU number and map it to physical CPU id (such as APIC id) for the hot-added CPU, it will also do some mapping for NUMA node id and etc, acpi_unmap_lsapic() will do the reverse. We can see that the name of the function is a little bit confusing and arch (IA64) dependent so rename them as acpi_(un)map_cpu() to make arch agnostic and explicit. Signed-off-by: Hanjun Guo Signed-off-by: Rafael J. Wysocki

ACPI / processor: Convert apic_id to phys_id to make it arch agnostic

2015-01-05T22:32:42Z

apic_id in MADT table is the CPU hardware id which identify it self in the system for x86 and ia64, OSPM will use it for SMP init to map APIC ID to logical cpu number in the early boot, when the DSDT/SSDT (ACPI namespace) is scanned later, the ACPI processor driver is probed and the driver will use acpi_id in DSDT to get the apic_id, then map to the logical cpu number which is needed by the processor driver. Before ACPI 5.0, only x86 and ia64 were supported in ACPI spec, so apic_id is used both in arch code and ACPI core which is pretty fine. Since ACPI 5.0, ARM is supported by ACPI and APIC is not available on ARM, this will confuse people when apic_id is both used by x86 and ARM in one function. So convert apic_id to phys_id (which is the original meaning) in ACPI processor dirver to make it arch agnostic, but leave the arch dependent code unchanged, no functional change. Signed-off-by: Hanjun Guo Signed-off-by: Rafael J. Wysocki

ACPI: Don't use acpi_lapic in ACPI core code

2014-07-21T11:50:58Z

Now ARM64 support is being added to ACPI so architecture specific values can not be used in core ACPI code. Following on the patch "ACPI / processor: Check if LAPIC is present during initialization" which uses acpi_lapic in acpi_processor.c, on ARM64 platform, GIC is used instead of local APIC, so acpi_lapic is not a suitable value for ARM64. What is actually important at this point is if there is/are CPU entry/entries (Local APIC/SAPIC, GICC) in MADT, so introduce acpi_has_cpu_in_madt() to be arch specific and generic. Signed-off-by: Graeme Gregory Signed-off-by: Hanjun Guo Signed-off-by: Rafael J. Wysocki