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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2023-08-25 20:40:50 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2023-08-25 20:40:50 +0200
commit9bd0c413b90c6517b4a2fbedb74f50df3421b50c (patch)
tree62ca7c12798a192264d159856e81f6041b6409ea /drivers/acpi
parente921f8c8dfc2b6aad4e7b4209c411768e2604c98 (diff)
parentf6fcf03ce8a9b8c135cf47f4978617bdf2829711 (diff)
Merge branch 'acpi-processor'
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
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/acpi_processor.c124
-rw-r--r--drivers/acpi/bus.c5
-rw-r--r--drivers/acpi/internal.h10
-rw-r--r--drivers/acpi/processor_core.c29
-rw-r--r--drivers/acpi/processor_pdc.c97
-rw-r--r--drivers/acpi/x86/utils.c35
6 files changed, 163 insertions, 137 deletions
diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c
index f9aa02cac6d1..c711db8a9c33 100644
--- a/drivers/acpi/acpi_processor.c
+++ b/drivers/acpi/acpi_processor.c
@@ -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)
+{
+ 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)
{
- u8 sb_uuid_str[] = "4077A616-290C-47BE-9EBD-D87058713953";
- u32 capbuf[2];
+ 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);
- }
+ 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,
- NULL, NULL);
+ 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
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 0168b3a556b6..f41dda2d3493 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -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
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index f4148dc50b9c..ced8224d7472 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -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
/* --------------------------------------------------------------------------
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index d6606a9f2da6..7dd6dbaa98c3 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -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);
diff --git a/drivers/acpi/processor_pdc.c b/drivers/acpi/processor_pdc.c
index 18fb04523f93..1a8591e9a9bf 100644
--- a/drivers/acpi/processor_pdc.c
+++ b/drivers/acpi/processor_pdc.c
@@ -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,
diff --git a/drivers/acpi/x86/utils.c b/drivers/acpi/x86/utils.c
index c2b925f8cd4e..63d834dd3811 100644
--- a/drivers/acpi/x86/utils.c
+++ b/drivers/acpi/x86/utils.c
@@ -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);
+}