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Message-Id: <20230613161034.3496047-2-michal.wilczynski@intel.com>
Date: Tue, 13 Jun 2023 19:10:30 +0300
From: Michal Wilczynski <michal.wilczynski@...el.com>
To: linux-acpi@...r.kernel.org
Cc: rafael@...nel.org, andriy.shevchenko@...el.com,
artem.bityutskiy@...ux.intel.com, mingo@...hat.com, bp@...en8.de,
dave.hansen@...ux.intel.com, hpa@...or.com, lenb@...nel.org,
jgross@...e.com, linux-kernel@...r.kernel.org, x86@...nel.org
Subject: [PATCH v3 1/5] acpi: Move logic responsible for conveying processor OSPM capabilities
Since _PDC method is deprecated and a preferred method of communicating
OSPM processor power management capabilities is _OSC, there is a need to
move functions checking whether processor is present and workarounds for
specific hardware to acpi_processor.c as this logic is not _PDC specific.
It also applies to the _OSC objects.
Move processor_dmi_check(), processor_idle_dmi_table, set_no_mwait() and
processor_physically_present() to acpi_processor.c.
Introduce IDLE_NOMWAIT workaround and processor_dmi_table workarounds to
work with _OSC objects.
Mark acpi_early_processor_set_pdc() and acpi_processor_set_pdc() as
deprecated.
Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Michal Wilczynski <michal.wilczynski@...el.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
drivers/acpi/acpi_processor.c | 84 ++++++++++++++++++++++++++++++++++-
drivers/acpi/internal.h | 3 ++
drivers/acpi/processor_pdc.c | 80 +--------------------------------
include/acpi/processor.h | 2 +-
4 files changed, 89 insertions(+), 80 deletions(-)
diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c
index f9aa02cac6d1..8c5d0295a042 100644
--- a/drivers/acpi/acpi_processor.c
+++ b/drivers/acpi/acpi_processor.c
@@ -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 +511,86 @@ 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 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 = {
+ {
+ .callback = 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 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);
+}
+
static bool acpi_hwp_native_thermal_lvt_set;
static acpi_status __init acpi_hwp_native_thermal_lvt_osc(acpi_handle handle,
u32 lvl,
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 06ad497067ac..f979a2f7077c 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -151,6 +151,9 @@ int acpi_wakeup_device_init(void);
-------------------------------------------------------------------------- */
#ifdef CONFIG_ARCH_MIGHT_HAVE_ACPI_PDC
void acpi_early_processor_set_pdc(void);
+
+void processor_dmi_check(void);
+bool processor_physically_present(acpi_handle handle);
#else
static inline void acpi_early_processor_set_pdc(void) {}
#endif
diff --git a/drivers/acpi/processor_pdc.c b/drivers/acpi/processor_pdc.c
index 18fb04523f93..5596862e6fea 100644
--- a/drivers/acpi/processor_pdc.c
+++ b/drivers/acpi/processor_pdc.c
@@ -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;
@@ -146,7 +97,7 @@ acpi_processor_eval_pdc(acpi_handle handle, struct acpi_object_list *pdc_in)
return status;
}
-void acpi_processor_set_pdc(acpi_handle handle)
+void __deprecated acpi_processor_set_pdc(acpi_handle handle)
{
struct acpi_object_list *obj_list;
@@ -174,34 +125,7 @@ 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)
+void __init __deprecated acpi_early_processor_set_pdc(void)
{
processor_dmi_check();
diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index 94181fe9780a..83ed42254567 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -372,7 +372,7 @@ static inline void acpi_cppc_processor_exit(struct acpi_processor *pr)
#endif /* CONFIG_ACPI_CPPC_LIB */
/* in processor_pdc.c */
-void acpi_processor_set_pdc(acpi_handle handle);
+void __deprecated acpi_processor_set_pdc(acpi_handle handle);
/* in processor_throttling.c */
#ifdef CONFIG_ACPI_CPU_FREQ_PSS
--
2.41.0
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