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Merge branch 'acpi-processor'

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Merge ACPI processor driver changes for 6.6-rc1:

 - Support obtaining physical CPU ID from MADT on LoongArch (Bibo Mao).

 - Convert ACPI CPU initialization to using _OSC instead of _PDC that
   has been depreceted since 2018 and dropped from the specification in
   ACPI 6.5 (Michal Wilczynski, Rafael Wysocki).

* acpi-processor:
  ACPI: processor: LoongArch: Get physical ID from MADT
  ACPI: processor: Refine messages in acpi_early_processor_control_setup()
  ACPI: processor: Remove acpi_hwp_native_thermal_lvt_osc()
  ACPI: processor: Use _OSC to convey OSPM processor support information
  ACPI: processor: Introduce acpi_processor_osc()
  ACPI: processor: Set CAP_SMP_T_SWCOORD in arch_acpi_set_proc_cap_bits()
  ACPI: processor: Clear C_C2C3_FFH and C_C1_FFH in arch_acpi_set_proc_cap_bits()
  ACPI: processor: Rename ACPI_PDC symbols
  ACPI: processor: Refactor arch_acpi_set_pdc_bits()
  ACPI: processor: Move processor_physically_present() to acpi_processor.c
  ACPI: processor: Move MWAIT quirk out of acpi_processor.c
This commit is contained in:
Rafael J. Wysocki 2023-08-25 20:40:50 +02:00
commit 9bd0c413b9
11 changed files with 226 additions and 188 deletions
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6
arch/ia64/include/asm/acpi.h
View File

@ -11,7 +11,7 @@
#ifdef __KERNEL__
#include <acpi/pdc_intel.h>
#include <acpi/proc_cap_intel.h>
#include <linux/init.h>
#include <linux/numa.h>
@ -69,9 +69,9 @@ extern int __initdata nid_to_pxm_map[MAX_NUMNODES];
#endif
static inline bool arch_has_acpi_pdc(void) { return true; }
static inline void arch_acpi_set_pdc_bits(u32 *buf)
static inline void arch_acpi_set_proc_cap_bits(u32 *cap)
{
buf[2] |= ACPI_PDC_EST_CAPABILITY_SMP;
*cap |= ACPI_PROC_CAP_EST_CAPABILITY_SMP;
}
#ifdef CONFIG_ACPI_NUMA

24
arch/x86/include/asm/acpi.h
View File

@ -6,7 +6,7 @@
* Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
* Copyright (C) 2001 Patrick Mochel <mochel@osdl.org>
*/
#include <acpi/pdc_intel.h>
#include <acpi/proc_cap_intel.h>
#include <asm/numa.h>
#include <asm/fixmap.h>
@ -102,23 +102,31 @@ static inline bool arch_has_acpi_pdc(void)
c->x86_vendor == X86_VENDOR_CENTAUR);
}
static inline void arch_acpi_set_pdc_bits(u32 *buf)
static inline void arch_acpi_set_proc_cap_bits(u32 *cap)
{
struct cpuinfo_x86 *c = &cpu_data(0);
buf[2] |= ACPI_PDC_C_CAPABILITY_SMP;
*cap |= ACPI_PROC_CAP_C_CAPABILITY_SMP;
/* Enable coordination with firmware's _TSD info */
*cap |= ACPI_PROC_CAP_SMP_T_SWCOORD;
if (cpu_has(c, X86_FEATURE_EST))
buf[2] |= ACPI_PDC_EST_CAPABILITY_SWSMP;
*cap |= ACPI_PROC_CAP_EST_CAPABILITY_SWSMP;
if (cpu_has(c, X86_FEATURE_ACPI))
buf[2] |= ACPI_PDC_T_FFH;
*cap |= ACPI_PROC_CAP_T_FFH;
if (cpu_has(c, X86_FEATURE_HWP))
*cap |= ACPI_PROC_CAP_COLLAB_PROC_PERF;
/*
* If mwait/monitor is unsupported, C2/C3_FFH will be disabled
* If mwait/monitor is unsupported, C_C1_FFH and
* C2/C3_FFH will be disabled.
*/
if (!cpu_has(c, X86_FEATURE_MWAIT))
buf[2] &= ~(ACPI_PDC_C_C2C3_FFH);
if (!cpu_has(c, X86_FEATURE_MWAIT) ||
boot_option_idle_override == IDLE_NOMWAIT)
*cap &= ~(ACPI_PROC_CAP_C_C1_FFH | ACPI_PROC_CAP_C_C2C3_FFH);
}
static inline bool acpi_has_cpu_in_madt(void)

8
arch/x86/xen/enlighten_pv.c
View File

@ -79,7 +79,7 @@
#ifdef CONFIG_ACPI
#include <linux/acpi.h>
#include <asm/acpi.h>
#include <acpi/pdc_intel.h>
#include <acpi/proc_cap_intel.h>
#include <acpi/processor.h>
#include <xen/interface/platform.h>
#endif
@ -288,17 +288,17 @@ static bool __init xen_check_mwait(void)
native_cpuid(&ax, &bx, &cx, &dx);
/* Ask the Hypervisor whether to clear ACPI_PDC_C_C2C3_FFH. If so,
/* Ask the Hypervisor whether to clear ACPI_PROC_CAP_C_C2C3_FFH. If so,
* don't expose MWAIT_LEAF and let ACPI pick the IOPORT version of C3.
*/
buf[0] = ACPI_PDC_REVISION_ID;
buf[1] = 1;
buf[2] = (ACPI_PDC_C_CAPABILITY_SMP | ACPI_PDC_EST_CAPABILITY_SWSMP);
buf[2] = (ACPI_PROC_CAP_C_CAPABILITY_SMP | ACPI_PROC_CAP_EST_CAPABILITY_SWSMP);
set_xen_guest_handle(op.u.set_pminfo.pdc, buf);
if ((HYPERVISOR_platform_op(&op) == 0) &&
(buf[2] & (ACPI_PDC_C_C1_FFH | ACPI_PDC_C_C2C3_FFH))) {
(buf[2] & (ACPI_PROC_CAP_C_C1_FFH | ACPI_PROC_CAP_C_C2C3_FFH))) {
cpuid_leaf5_ecx_val = cx;
cpuid_leaf5_edx_val = dx;
}

120
drivers/acpi/acpi_processor.c
View File

@ -9,9 +9,11 @@
* Copyright (C) 2013, Intel Corporation
* Rafael J. Wysocki <rafael.j.wysocki@intel.com>
*/
#define pr_fmt(fmt) "ACPI: " fmt
#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 +23,8 @@
#include <asm/cpu.h>
#include <xen/xen.h>
#include "internal.h"
DEFINE_PER_CPU(struct acpi_processor *, processors);
@ -508,54 +512,110 @@ static void acpi_processor_remove(struct acpi_device *device)
}
#endif /* CONFIG_ACPI_HOTPLUG_CPU */
#ifdef CONFIG_X86
static bool acpi_hwp_native_thermal_lvt_set;
static acpi_status __init acpi_hwp_native_thermal_lvt_osc(acpi_handle handle,
u32 lvl,
void *context,
void **rv)
#ifdef CONFIG_ARCH_MIGHT_HAVE_ACPI_PDC
bool __init processor_physically_present(acpi_handle handle)
{
u8 sb_uuid_str[] = "4077A616-290C-47BE-9EBD-D87058713953";
u32 capbuf[2];
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);
}
/* vendor specific UUID indicating an Intel platform */
static u8 sb_uuid_str[] = "4077A616-290C-47BE-9EBD-D87058713953";
static acpi_status __init acpi_processor_osc(acpi_handle handle, u32 lvl,
void *context, void **rv)
{
u32 capbuf[2] = {};
struct acpi_osc_context osc_context = {
.uuid_str = sb_uuid_str,
.rev = 1,
.cap.length = 8,
.cap.pointer = capbuf,
};
acpi_status status;
if (acpi_hwp_native_thermal_lvt_set)
return AE_CTRL_TERMINATE;
if (!processor_physically_present(handle))
return AE_OK;
capbuf[0] = 0x0000;
capbuf[1] = 0x1000; /* set bit 12 */
arch_acpi_set_proc_cap_bits(&capbuf[OSC_SUPPORT_DWORD]);
if (ACPI_SUCCESS(acpi_run_osc(handle, &osc_context))) {
if (osc_context.ret.pointer && osc_context.ret.length > 1) {
u32 *capbuf_ret = osc_context.ret.pointer;
status = acpi_run_osc(handle, &osc_context);
if (ACPI_FAILURE(status))
return status;
if (capbuf_ret[1] & 0x1000) {
acpi_handle_info(handle,
"_OSC native thermal LVT Acked\n");
acpi_hwp_native_thermal_lvt_set = true;
}
}
kfree(osc_context.ret.pointer);
}
return AE_OK;
}
void __init acpi_early_processor_osc(void)
static bool __init acpi_early_processor_osc(void)
{
if (boot_cpu_has(X86_FEATURE_HWP)) {
acpi_walk_namespace(ACPI_TYPE_PROCESSOR, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX,
acpi_hwp_native_thermal_lvt_osc,
NULL, NULL, NULL);
acpi_get_devices(ACPI_PROCESSOR_DEVICE_HID,
acpi_hwp_native_thermal_lvt_osc,
acpi_status status;
acpi_proc_quirk_mwait_check();
status = acpi_walk_namespace(ACPI_TYPE_PROCESSOR, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, acpi_processor_osc, NULL,
NULL, NULL);
if (ACPI_FAILURE(status))
return false;
status = acpi_get_devices(ACPI_PROCESSOR_DEVICE_HID, acpi_processor_osc,
NULL, NULL);
if (ACPI_FAILURE(status))
return false;
return true;
}
void __init acpi_early_processor_control_setup(void)
{
if (acpi_early_processor_osc()) {
pr_info("_OSC evaluated successfully for all CPUs\n");
} else {
pr_info("_OSC evaluation for CPUs failed, trying _PDC\n");
acpi_early_processor_set_pdc();
}
}
#endif

5
drivers/acpi/bus.c
View File

@ -1322,9 +1322,6 @@ 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
@ -1340,7 +1337,7 @@ 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

10
drivers/acpi/internal.h
View File

@ -152,15 +152,13 @@ int acpi_wakeup_device_init(void);
Processor
-------------------------------------------------------------------------- */
#ifdef CONFIG_ARCH_MIGHT_HAVE_ACPI_PDC
void acpi_early_processor_control_setup(void);
void acpi_early_processor_set_pdc(void);
#else
static inline void acpi_early_processor_set_pdc(void) {}
#endif
#ifdef CONFIG_X86
void acpi_early_processor_osc(void);
void acpi_proc_quirk_mwait_check(void);
bool processor_physically_present(acpi_handle handle);
#else
static inline void acpi_early_processor_osc(void) {}
static inline void acpi_early_processor_control_setup(void) {}
#endif
/* --------------------------------------------------------------------------

29
drivers/acpi/processor_core.c
View File

@ -132,6 +132,30 @@ static int map_rintc_hartid(struct acpi_subtable_header *entry,
return -EINVAL;
}
/*
* Retrieve LoongArch CPU physical id
*/
static int map_core_pic_id(struct acpi_subtable_header *entry,
int device_declaration, u32 acpi_id, phys_cpuid_t *phys_id)
{
struct acpi_madt_core_pic *core_pic =
container_of(entry, struct acpi_madt_core_pic, header);
if (!(core_pic->flags & ACPI_MADT_ENABLED))
return -ENODEV;
/* device_declaration means Device object in DSDT, in LoongArch
* system, logical processor acpi_id is required in _UID property
* of DSDT table, so we should check device_declaration here
*/
if (device_declaration && (core_pic->processor_id == acpi_id)) {
*phys_id = core_pic->core_id;
return 0;
}
return -EINVAL;
}
static phys_cpuid_t map_madt_entry(struct acpi_table_madt *madt,
int type, u32 acpi_id)
{
@ -165,6 +189,9 @@ static phys_cpuid_t map_madt_entry(struct acpi_table_madt *madt,
} else if (header->type == ACPI_MADT_TYPE_RINTC) {
if (!map_rintc_hartid(header, type, acpi_id, &phys_id))
break;
} else if (header->type == ACPI_MADT_TYPE_CORE_PIC) {
if (!map_core_pic_id(header, type, acpi_id, &phys_id))
break;
}
entry += header->length;
}
@ -216,6 +243,8 @@ static phys_cpuid_t map_mat_entry(acpi_handle handle, int type, u32 acpi_id)
map_x2apic_id(header, type, acpi_id, &phys_id);
else if (header->type == ACPI_MADT_TYPE_GENERIC_INTERRUPT)
map_gicc_mpidr(header, type, acpi_id, &phys_id);
else if (header->type == ACPI_MADT_TYPE_CORE_PIC)
map_core_pic_id(header, type, acpi_id, &phys_id);
exit:
kfree(buffer.pointer);

97
drivers/acpi/processor_pdc.c
View File

@ -9,71 +9,19 @@
#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;
buf[1] = 1;
/* Enable coordination with firmware's _TSD info */
buf[2] = ACPI_PDC_SMP_T_SWCOORD;
/* Twiddle arch-specific bits needed for _PDC */
arch_acpi_set_pdc_bits(buf);
arch_acpi_set_proc_cap_bits(&buf[2]);
}
static struct acpi_object_list *acpi_processor_alloc_pdc(void)
@ -123,20 +71,6 @@ acpi_processor_eval_pdc(acpi_handle handle, struct acpi_object_list *pdc_in)
{
acpi_status status = AE_OK;
if (boot_option_idle_override == IDLE_NOMWAIT) {
/*
* If mwait is disabled for CPU C-states, the C2C3_FFH access
* mode will be disabled in the parameter of _PDC object.
* Of course C1_FFH access mode will also be disabled.
*/
union acpi_object *obj;
u32 *buffer = NULL;
obj = pdc_in->pointer;
buffer = (u32 *)(obj->buffer.pointer);
buffer[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH);
}
status = acpi_evaluate_object(handle, "_PDC", pdc_in, NULL);
if (ACPI_FAILURE(status))
@ -174,36 +108,9 @@ early_init_pdc(acpi_handle handle, u32 lvl, void *context, void **rv)
return AE_OK;
}
static int __init set_no_mwait(const struct dmi_system_id *id)
{
pr_notice("%s detected - disabling mwait for CPU C-states\n",
id->ident);
boot_option_idle_override = IDLE_NOMWAIT;
return 0;
}
static const struct dmi_system_id processor_idle_dmi_table[] __initconst = {
{
set_no_mwait, "Extensa 5220", {
DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
DMI_MATCH(DMI_PRODUCT_VERSION, "0100"),
DMI_MATCH(DMI_BOARD_NAME, "Columbia") }, NULL},
{},
};
static void __init processor_dmi_check(void)
{
/*
* Check whether the system is DMI table. If yes, OSPM
* should not use mwait for CPU-states.
*/
dmi_check_system(processor_idle_dmi_table);
}
void __init acpi_early_processor_set_pdc(void)
{
processor_dmi_check();
acpi_proc_quirk_mwait_check();
acpi_walk_namespace(ACPI_TYPE_PROCESSOR, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX,

35
drivers/acpi/x86/utils.c
View File

@ -518,3 +518,38 @@ bool acpi_quirk_skip_acpi_ac_and_battery(void)
return false;
}
EXPORT_SYMBOL_GPL(acpi_quirk_skip_acpi_ac_and_battery);
/* This section provides a workaround for a specific x86 system
* which requires disabling of mwait to work correctly.
*/
static int __init acpi_proc_quirk_set_no_mwait(const struct dmi_system_id *id)
{
pr_notice("%s detected - disabling mwait for CPU C-states\n",
id->ident);
boot_option_idle_override = IDLE_NOMWAIT;
return 0;
}
static const struct dmi_system_id acpi_proc_quirk_mwait_dmi_table[] __initconst = {
{
.callback = acpi_proc_quirk_set_no_mwait,
.ident = "Extensa 5220",
.matches = {
DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
DMI_MATCH(DMI_PRODUCT_VERSION, "0100"),
DMI_MATCH(DMI_BOARD_NAME, "Columbia"),
},
.driver_data = NULL,
},
{}
};
void __init acpi_proc_quirk_mwait_check(void)
{
/*
* Check whether the system is DMI table. If yes, OSPM
* should not use mwait for CPU-states.
*/
dmi_check_system(acpi_proc_quirk_mwait_dmi_table);
}

36
include/acpi/pdc_intel.h
View File

@ -1,36 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/* _PDC bit definition for Intel processors */
#ifndef __PDC_INTEL_H__
#define __PDC_INTEL_H__
#define ACPI_PDC_P_FFH (0x0001)
#define ACPI_PDC_C_C1_HALT (0x0002)
#define ACPI_PDC_T_FFH (0x0004)
#define ACPI_PDC_SMP_C1PT (0x0008)
#define ACPI_PDC_SMP_C2C3 (0x0010)
#define ACPI_PDC_SMP_P_SWCOORD (0x0020)
#define ACPI_PDC_SMP_C_SWCOORD (0x0040)
#define ACPI_PDC_SMP_T_SWCOORD (0x0080)
#define ACPI_PDC_C_C1_FFH (0x0100)
#define ACPI_PDC_C_C2C3_FFH (0x0200)
#define ACPI_PDC_SMP_P_HWCOORD (0x0800)
#define ACPI_PDC_EST_CAPABILITY_SMP (ACPI_PDC_SMP_C1PT | \
ACPI_PDC_C_C1_HALT | \
ACPI_PDC_P_FFH)
#define ACPI_PDC_EST_CAPABILITY_SWSMP (ACPI_PDC_SMP_C1PT | \
ACPI_PDC_C_C1_HALT | \
ACPI_PDC_SMP_P_SWCOORD | \
ACPI_PDC_SMP_P_HWCOORD | \
ACPI_PDC_P_FFH)
#define ACPI_PDC_C_CAPABILITY_SMP (ACPI_PDC_SMP_C2C3 | \
ACPI_PDC_SMP_C1PT | \
ACPI_PDC_C_C1_HALT | \
ACPI_PDC_C_C1_FFH | \
ACPI_PDC_C_C2C3_FFH)
#endif /* __PDC_INTEL_H__ */

40
include/acpi/proc_cap_intel.h Normal file
View File

@ -0,0 +1,40 @@
/* SPDX-License-Identifier: GPL-2.0 */
/* Vendor specific processor capabilities bit definition
* for Intel processors. Those bits are used to convey OSPM
* power management capabilities to the platform.
*/
#ifndef __PROC_CAP_INTEL_H__
#define __PROC_CAP_INTEL_H__
#define ACPI_PROC_CAP_P_FFH (0x0001)
#define ACPI_PROC_CAP_C_C1_HALT (0x0002)
#define ACPI_PROC_CAP_T_FFH (0x0004)
#define ACPI_PROC_CAP_SMP_C1PT (0x0008)
#define ACPI_PROC_CAP_SMP_C2C3 (0x0010)
#define ACPI_PROC_CAP_SMP_P_SWCOORD (0x0020)
#define ACPI_PROC_CAP_SMP_C_SWCOORD (0x0040)
#define ACPI_PROC_CAP_SMP_T_SWCOORD (0x0080)
#define ACPI_PROC_CAP_C_C1_FFH (0x0100)
#define ACPI_PROC_CAP_C_C2C3_FFH (0x0200)
#define ACPI_PROC_CAP_SMP_P_HWCOORD (0x0800)
#define ACPI_PROC_CAP_COLLAB_PROC_PERF (0x1000)
#define ACPI_PROC_CAP_EST_CAPABILITY_SMP (ACPI_PROC_CAP_SMP_C1PT | \
ACPI_PROC_CAP_C_C1_HALT | \
ACPI_PROC_CAP_P_FFH)
#define ACPI_PROC_CAP_EST_CAPABILITY_SWSMP (ACPI_PROC_CAP_SMP_C1PT | \
ACPI_PROC_CAP_C_C1_HALT | \
ACPI_PROC_CAP_SMP_P_SWCOORD | \
ACPI_PROC_CAP_SMP_P_HWCOORD | \
ACPI_PROC_CAP_P_FFH)
#define ACPI_PROC_CAP_C_CAPABILITY_SMP (ACPI_PROC_CAP_SMP_C2C3 | \
ACPI_PROC_CAP_SMP_C1PT | \
ACPI_PROC_CAP_C_C1_HALT | \
ACPI_PROC_CAP_C_C1_FFH | \
ACPI_PROC_CAP_C_C2C3_FFH)
#endif /* __PROC_CAP_INTEL_H__ */