| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <12f980ac-f1d3-a802-37a9-cb6e03b046de@linux.intel.com>
Date: Tue, 29 Oct 2024 19:06:18 +0200 (EET)
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: Kurt Borja <kuurtb@...il.com>
cc: W_Armin@....de, Hans de Goede <hdegoede@...hat.com>,
LKML <linux-kernel@...r.kernel.org>, platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH v10 3/5] alienware-wmi: added platform profile support
On Tue, 29 Oct 2024, Kurt Borja wrote:
> On Tue, Oct 29, 2024 at 05:44:05PM +0200, Ilpo Järvinen wrote:
> > On Tue, 29 Oct 2024, Kurt Borja wrote:
> >
> > > Implements platform profile support for Dell laptops with new WMAX thermal
> > > interface, present on some Alienware X-Series, Alienware M-Series and
> > > Dell's G-Series laptops. This interface is suspected to be used by
> > > Alienware Command Center (AWCC), which is not available for linux
> > > systems, to manage thermal profiles.
> > >
> > > This implementation makes use of three WMI methods, namely
> > > THERMAL_CONTROL, THERMAL_INFORMATION and GAME_SHIFT_STATUS, which take
> > > u32 as input and output arguments. Each method has a set of supported
> > > operations specified in their respective enums.
> > >
> > > Not all models with WMAX WMI interface support these methods. Because of
> > > this, models have to manually declare support through new quirks
> > > `thermal` for THERMAL_CONTROL and THERMAL_INFORMATION and `gmode` for
> > > GAME_SHIFT_STATUS.
> > >
> > > Wrappers written for these methods support multiple operations.
> > >
> > > THERMAL_CONTROL switches thermal modes through operation
> > > ACTIVATE_PROFILE. Available thermal codes are auto-detected at runtime
> > > and matched against a list of known thermal codes:
> > >
> > > Thermal Table "User Selectable Thermal Tables" (USTT):
> > > BALANCED 0xA0
> > > BALANCED_PERFORMANCE 0xA1
> > > COOL 0xA2
> > > QUIET 0xA3
> > > PERFORMANCE 0xA4
> > > LOW_POWER 0xA5
> > >
> > > Thermal Table Basic:
> > > QUIET 0x96
> > > BALANCED 0x97
> > > BALANCED_PERFORMANCE 0x98
> > > PERFORMANCE 0x99
> > >
> > > Devices are known to implement only one of these tables without mixing
> > > their thermal codes.
> > >
> > > The fact that the least significant digit of every thermal code is
> > > consecutive of one another is exploited to efficiently match codes
> > > through arrays.
> > >
> > > Autodetection of available codes is done through operation LIST_IDS of
> > > method THERMAL_INFORMATION. This operation lists fan IDs, CPU sensor ID,
> > > GPU sensor ID and available thermal profile codes, *in that order*. As
> > > number of fans and thermal codes is very model dependent, almost every
> > > ID is scanned and matched based on conditions found on
> > > is_wmax_thermal_code(). The known upper bound for the number of IDs is
> > > 13, corresponding to a device that have 4 fans, 2 sensors and 7 thermal
> > > codes.
> > >
> > > Additionally G-Series laptops have a key called G-key, which (with AWCC
> > > proprietary driver) switches the thermal mode to an special mode named
> > > GMODE with code 0xAB and changes Game Shift Status to 1. Game Shift is a
> > > mode the manufacturer claims, increases gaming performance.
> > >
> > > GAME_SHIFT_STATUS method is used to mimic this behavior when selecting
> > > PLATFORM_PROFILE_PERFORMANCE option.
> > >
> > > All of these profiles are known to only change fan speed profiles,
> > > although there are untested claims that some of them also change power
> > > profiles.
> > >
> > > Activating a thermal mode with method THERMAL_CONTROL may cause short
> > > hangs. This is a known problem present on every platform.
> > >
> > > Signed-off-by: Kurt Borja <kuurtb@...il.com>
> > > Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
> > > ---
> > > v10:
> > > - Corrected THERMAL_MODE_BASIC_BALANCED -> THERMAL_MODE_BASIC_QUIET in
> > > is_wmax_thermal_code() logic
> > > - `thermal` and `gmode` quirks now have to be manually selected,
> > > because not all Dell devices posses the new WMI thermal methods.
> > > - Because of the above reason, errors in create_thermal_profile are now
> > > propagated
> > > v9:
> > > - Bool comparisons are now coherent with their type
> > > v8:
> > > - Fixed alignment in wmax_mode_to_platform_profile[]
> > > - Quirk thermal and gmode changed from u8 -> bool
> > > - Autodetected quirk entries are not initialized
> > > - is_wmax_thermal_code refactored to increase readibility
> > > - is_wmax_thermal_code now covers all possibilities
> > > - Better commit message
> > > v7:
> > > - Method operations are now clearly listed as separate enums
> > > - wmax_thermal_modes are now listed without codes in order to support
> > > autodetection, as well as getting and setting thermal profiles
> > > cleanly through arrays
> > > - Added wmax_mode_to_platform_profile[]
> > > - Added struct wmax_u32_args to replace bit mask approach of
> > > constructing arguments for wmax methods
> > > - create_thermal_profile now autodetects available thermal codes
> > > through operation 0x03 of THERMAL_INFORMATION method. These are
> > > codes are stored in supported_thermal_profiles[]
> > > - thermal_profile_get now uses wmax_mode_to_platform_profile[] instead of
> > > switch-case approach
> > > - thermal_profile_set now uses supported_thermal_profiles[] instead of
> > > switch-case approach
> > > - When gmode is autodetected, thermal_profile_set also sets Game Shift
> > > status accordingly
> > > v6:
> > > - Fixed alignment on some function definitions
> > > - Fixed braces on if statment
> > > - Removed quirk thermal_ustt
> > > - Now quirk thermal can take values defined in enum WMAX_THERMAL_TABLE.
> > > - Proper removal of thermal_profile
> > > ---
> > > drivers/platform/x86/dell/Kconfig | 1 +
> > > drivers/platform/x86/dell/alienware-wmi.c | 306 ++++++++++++++++++++++
> > > 2 files changed, 307 insertions(+)
> > >
> > > diff --git a/drivers/platform/x86/dell/Kconfig b/drivers/platform/x86/dell/Kconfig
> > > index 68a49788a..b06d634cd 100644
> > > --- a/drivers/platform/x86/dell/Kconfig
> > > +++ b/drivers/platform/x86/dell/Kconfig
> > > @@ -21,6 +21,7 @@ config ALIENWARE_WMI
> > > depends on LEDS_CLASS
> > > depends on NEW_LEDS
> > > depends on ACPI_WMI
> > > + select ACPI_PLATFORM_PROFILE
> > > help
> > > This is a driver for controlling Alienware BIOS driven
> > > features. It exposes an interface for controlling the AlienFX
> > > diff --git a/drivers/platform/x86/dell/alienware-wmi.c b/drivers/platform/x86/dell/alienware-wmi.c
> > > index b27f3b64c..1d62c2ce7 100644
> > > --- a/drivers/platform/x86/dell/alienware-wmi.c
> > > +++ b/drivers/platform/x86/dell/alienware-wmi.c
> > > @@ -8,8 +8,11 @@
> > > #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
> > >
> > > #include <linux/acpi.h>
> > > +#include <linux/bitfield.h>
> > > +#include <linux/bits.h>
> > > #include <linux/module.h>
> > > #include <linux/platform_device.h>
> > > +#include <linux/platform_profile.h>
> > > #include <linux/dmi.h>
> > > #include <linux/leds.h>
> > >
> > > @@ -25,6 +28,13 @@
> > > #define WMAX_METHOD_AMPLIFIER_CABLE 0x6
> > > #define WMAX_METHOD_DEEP_SLEEP_CONTROL 0x0B
> > > #define WMAX_METHOD_DEEP_SLEEP_STATUS 0x0C
> > > +#define WMAX_METHOD_THERMAL_INFORMATION 0x14
> > > +#define WMAX_METHOD_THERMAL_CONTROL 0x15
> > > +#define WMAX_METHOD_GAME_SHIFT_STATUS 0x25
> > > +
> > > +#define WMAX_THERMAL_MODE_GMODE 0xAB
> > > +
> > > +#define WMAX_FAILURE_CODE 0xFFFFFFFF
> > >
> > > MODULE_AUTHOR("Mario Limonciello <mario.limonciello@...look.com>");
> > > MODULE_DESCRIPTION("Alienware special feature control");
> > > @@ -49,11 +59,59 @@ enum WMAX_CONTROL_STATES {
> > > WMAX_SUSPEND = 3,
> > > };
> > >
> > > +enum WMAX_THERMAL_INFORMATION_OPERATIONS {
> > > + WMAX_OPERATION_LIST_IDS = 0x03,
> > > + WMAX_OPERATION_CURRENT_PROFILE = 0x0B,
> > > +};
> > > +
> > > +enum WMAX_THERMAL_CONTROL_OPERATIONS {
> > > + WMAX_OPERATION_ACTIVATE_PROFILE = 0x01,
> > > +};
> > > +
> > > +enum WMAX_GAME_SHIFT_STATUS_OPERATIONS {
> > > + WMAX_OPERATION_TOGGLE_GAME_SHIFT = 0x01,
> > > + WMAX_OPERATION_GET_GAME_SHIFT_STATUS = 0x02,
> > > +};
> > > +
> > > +enum WMAX_THERMAL_TABLES {
> > > + WMAX_THERMAL_TABLE_BASIC = 0x90,
> > > + WMAX_THERMAL_TABLE_USTT = 0xA0,
> > > +};
> > > +
> > > +enum wmax_thermal_mode {
> > > + THERMAL_MODE_USTT_BALANCED,
> > > + THERMAL_MODE_USTT_BALANCED_PERFORMANCE,
> > > + THERMAL_MODE_USTT_COOL,
> > > + THERMAL_MODE_USTT_QUIET,
> > > + THERMAL_MODE_USTT_PERFORMANCE,
> > > + THERMAL_MODE_USTT_LOW_POWER,
> > > + THERMAL_MODE_BASIC_QUIET,
> > > + THERMAL_MODE_BASIC_BALANCED,
> > > + THERMAL_MODE_BASIC_BALANCED_PERFORMANCE,
> > > + THERMAL_MODE_BASIC_PERFORMANCE,
> > > + THERMAL_MODE_LAST,
> > > +};
> > > +
> > > +static const enum platform_profile_option wmax_mode_to_platform_profile[THERMAL_MODE_LAST] = {
> > > + [THERMAL_MODE_USTT_BALANCED] = PLATFORM_PROFILE_BALANCED,
> > > + [THERMAL_MODE_USTT_BALANCED_PERFORMANCE] = PLATFORM_PROFILE_BALANCED_PERFORMANCE,
> > > + [THERMAL_MODE_USTT_COOL] = PLATFORM_PROFILE_COOL,
> > > + [THERMAL_MODE_USTT_QUIET] = PLATFORM_PROFILE_QUIET,
> > > + [THERMAL_MODE_USTT_PERFORMANCE] = PLATFORM_PROFILE_PERFORMANCE,
> > > + [THERMAL_MODE_USTT_LOW_POWER] = PLATFORM_PROFILE_LOW_POWER,
> > > + [THERMAL_MODE_BASIC_QUIET] = PLATFORM_PROFILE_QUIET,
> > > + [THERMAL_MODE_BASIC_BALANCED] = PLATFORM_PROFILE_BALANCED,
> > > + [THERMAL_MODE_BASIC_BALANCED_PERFORMANCE] = PLATFORM_PROFILE_BALANCED_PERFORMANCE,
> > > + [THERMAL_MODE_BASIC_PERFORMANCE] = PLATFORM_PROFILE_PERFORMANCE,
> > > +};
> > > +
> > > struct quirk_entry {
> > > u8 num_zones;
> > > u8 hdmi_mux;
> > > u8 amplifier;
> > > u8 deepslp;
> > > + bool thermal;
> > > + bool gmode;
> > > };
> > >
> > > static struct quirk_entry *quirks;
> > > @@ -64,6 +122,8 @@ static struct quirk_entry quirk_inspiron5675 = {
> > > .hdmi_mux = 0,
> > > .amplifier = 0,
> > > .deepslp = 0,
> > > + .thermal = false,
> > > + .gmode = false,
> > > };
> > >
> > > static struct quirk_entry quirk_unknown = {
> > > @@ -71,6 +131,8 @@ static struct quirk_entry quirk_unknown = {
> > > .hdmi_mux = 0,
> > > .amplifier = 0,
> > > .deepslp = 0,
> > > + .thermal = false,
> > > + .gmode = false,
> > > };
> > >
> > > static struct quirk_entry quirk_x51_r1_r2 = {
> > > @@ -78,6 +140,8 @@ static struct quirk_entry quirk_x51_r1_r2 = {
> > > .hdmi_mux = 0,
> > > .amplifier = 0,
> > > .deepslp = 0,
> > > + .thermal = false,
> > > + .gmode = false,
> > > };
> > >
> > > static struct quirk_entry quirk_x51_r3 = {
> > > @@ -85,6 +149,8 @@ static struct quirk_entry quirk_x51_r3 = {
> > > .hdmi_mux = 0,
> > > .amplifier = 1,
> > > .deepslp = 0,
> > > + .thermal = false,
> > > + .gmode = false,
> > > };
> > >
> > > static struct quirk_entry quirk_asm100 = {
> > > @@ -92,6 +158,8 @@ static struct quirk_entry quirk_asm100 = {
> > > .hdmi_mux = 1,
> > > .amplifier = 0,
> > > .deepslp = 0,
> > > + .thermal = false,
> > > + .gmode = false,
> > > };
> > >
> > > static struct quirk_entry quirk_asm200 = {
> > > @@ -99,6 +167,8 @@ static struct quirk_entry quirk_asm200 = {
> > > .hdmi_mux = 1,
> > > .amplifier = 0,
> > > .deepslp = 1,
> > > + .thermal = false,
> > > + .gmode = false,
> > > };
> > >
> > > static struct quirk_entry quirk_asm201 = {
> > > @@ -106,6 +176,17 @@ static struct quirk_entry quirk_asm201 = {
> > > .hdmi_mux = 1,
> > > .amplifier = 1,
> > > .deepslp = 1,
> > > + .thermal = false,
> > > + .gmode = false,
> > > +};
> > > +
> > > +static struct quirk_entry quirk_x_series = {
> > > + .num_zones = 2,
> > > + .hdmi_mux = 0,
> > > + .amplifier = 0,
> > > + .deepslp = 0,
> > > + .thermal = true,
> > > + .gmode = false,
> > > };
> >
> > So now gmode is always false unless the module parameter from patch 4 is
> > given?
>
> G-Series laptops can also register a quirk_entry with gmode set in the
> future. I can do it ahead of time, but I don't have a G-Series laptop to
> test it.
Understood. I'm fine with this in the current form if it's fine for Armin
too.
--
i.
Powered by blists - more mailing lists