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ACPI: processor: Move processor_physically_present() to acpi_processor.c

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Since _PDC method is deprecated and a preferred method of communicating
OSPM processor power management capabilities is _OSC, there is a need to
move function checking whether processor is present as this logic is not
_PDC specific.

Move processor_physically_present() to acpi_processor.c.

No intentional functional impact.

Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Michal Wilczynski <michal.wilczynski@intel.com>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Michal Wilczynski 2023-07-10 17:03:30 +03:00 • committed by Rafael J. Wysocki
parent 0a0e2ea642
commit 3272a4aadc
3 changed files with 52 additions and 50 deletions
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52
drivers/acpi/acpi_processor.c
View file

@ -12,6 +12,7 @@
#include <linux/acpi.h>
#include <linux/device.h>
#include <linux/dmi.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
@ -21,6 +22,8 @@
#include <asm/cpu.h>
#include <xen/xen.h>
#include "internal.h"
DEFINE_PER_CPU(struct acpi_processor *, processors);
@ -508,7 +511,54 @@ static void acpi_processor_remove(struct acpi_device *device)
}
#endif /* CONFIG_ACPI_HOTPLUG_CPU */
#ifdef CONFIG_X86
#ifdef CONFIG_ARCH_MIGHT_HAVE_ACPI_PDC
bool __init processor_physically_present(acpi_handle handle)
{
int cpuid, type;
u32 acpi_id;
acpi_status status;
acpi_object_type acpi_type;
unsigned long long tmp;
union acpi_object object = {};
struct acpi_buffer buffer = { sizeof(union acpi_object), &object };
status = acpi_get_type(handle, &acpi_type);
if (ACPI_FAILURE(status))
return false;
switch (acpi_type) {
case ACPI_TYPE_PROCESSOR:
status = acpi_evaluate_object(handle, NULL, NULL, &buffer);
if (ACPI_FAILURE(status))
return false;
acpi_id = object.processor.proc_id;
break;
case ACPI_TYPE_DEVICE:
status = acpi_evaluate_integer(handle, METHOD_NAME__UID,
NULL, &tmp);
if (ACPI_FAILURE(status))
return false;
acpi_id = tmp;
break;
default:
return false;
}
if (xen_initial_domain())
/*
* When running as a Xen dom0 the number of processors Linux
* sees can be different from the real number of processors on
* the system, and we still need to execute _PDC or _OSC for
* all of them.
*/
return xen_processor_present(acpi_id);
type = (acpi_type == ACPI_TYPE_DEVICE) ? 1 : 0;
cpuid = acpi_get_cpuid(handle, type, acpi_id);
return !invalid_logical_cpuid(cpuid);
}
static bool acpi_hwp_native_thermal_lvt_set;
static acpi_status __init acpi_hwp_native_thermal_lvt_osc(acpi_handle handle,
u32 lvl,

1
drivers/acpi/internal.h
View file

@ -155,6 +155,7 @@ int acpi_wakeup_device_init(void);
void acpi_early_processor_set_pdc(void);
void acpi_proc_quirk_mwait_check(void);
bool processor_physically_present(acpi_handle handle);
#else
static inline void acpi_early_processor_set_pdc(void) {}
#endif

49
drivers/acpi/processor_pdc.c
View file

@ -9,61 +9,12 @@
#define pr_fmt(fmt) "ACPI: " fmt
#include <linux/dmi.h>
#include <linux/slab.h>
#include <linux/acpi.h>
#include <acpi/processor.h>
#include <xen/xen.h>
#include "internal.h"
static bool __init processor_physically_present(acpi_handle handle)
{
int cpuid, type;
u32 acpi_id;
acpi_status status;
acpi_object_type acpi_type;
unsigned long long tmp;
union acpi_object object = { 0 };
struct acpi_buffer buffer = { sizeof(union acpi_object), &object };
status = acpi_get_type(handle, &acpi_type);
if (ACPI_FAILURE(status))
return false;
switch (acpi_type) {
case ACPI_TYPE_PROCESSOR:
status = acpi_evaluate_object(handle, NULL, NULL, &buffer);
if (ACPI_FAILURE(status))
return false;
acpi_id = object.processor.proc_id;
break;
case ACPI_TYPE_DEVICE:
status = acpi_evaluate_integer(handle, "_UID", NULL, &tmp);
if (ACPI_FAILURE(status))
return false;
acpi_id = tmp;
break;
default:
return false;
}
if (xen_initial_domain())
/*
* When running as a Xen dom0 the number of processors Linux
* sees can be different from the real number of processors on
* the system, and we still need to execute _PDC for all of
* them.
*/
return xen_processor_present(acpi_id);
type = (acpi_type == ACPI_TYPE_DEVICE) ? 1 : 0;
cpuid = acpi_get_cpuid(handle, type, acpi_id);
return !invalid_logical_cpuid(cpuid);
}
static void acpi_set_pdc_bits(u32 *buf)
{
buf[0] = ACPI_PDC_REVISION_ID;