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ACPI: processor: Move MWAIT quirk out of acpi_processor.c 

Commit 2a2a64714d ("ACPI: Disable MWAIT via DMI on broken Compal board")
introduced a workaround for MWAIT for a specific x86 system.

Move the code outside of acpi_processor.c to acpi/x86/ directory for
consistency and rename the functions associated with it, so their names
start with "acpi_proc_quirk_" to make the goal obvious.

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, two function names changed ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Michal Wilczynski 2023-07-10 17:03:29 +03:00 committed by Rafael J. Wysocki
parent 06c2afb862
commit 0a0e2ea642
3 changed files with 38 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/acpi/internal.h
View File

@ -153,6 +153,8 @@ int acpi_wakeup_device_init(void);
-------------------------------------------------------------------------- */
#ifdef CONFIG_ARCH_MIGHT_HAVE_ACPI_PDC
void acpi_early_processor_set_pdc(void);
void acpi_proc_quirk_mwait_check(void);
#else
static inline void acpi_early_processor_set_pdc(void) {}
#endif

29
drivers/acpi/processor_pdc.c
View File

@ -174,36 +174,9 @@ 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);
}