linux-kernel - Re: [PATCH v2 5/9] platform/x86: asus-wmi: store a min default for ppt options

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

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Tue, 2 Apr 2024 13:49:50 +0300 (EEST)
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: "Luke D. Jones" <luke@...nes.dev>
cc: Hans de Goede <hdegoede@...hat.com>, corentin.chary@...il.com, 
    platform-driver-x86@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 5/9] platform/x86: asus-wmi: store a min default for
 ppt options

On Tue, 2 Apr 2024, Luke D. Jones wrote:

> Laptops with any of the ppt or nv tunables default to the minimum setting
> on boot so we can safely assume a stored value is correct.
> 
> This patch adds storing of those values in the local struct, and enables
> reading of those values back. To prevent creating a series of byte holes
> in the struct the "<name>_available" bool is removed and
> `asus_sysfs_is_visible()` uses the `ASUS_WMI_DEVID_<name>` directly.
> 
> Signed-off-by: Luke D. Jones <luke@...nes.dev>
> ---
>  drivers/platform/x86/asus-wmi.c | 127 +++++++++++++++++++++++++-------
>  1 file changed, 99 insertions(+), 28 deletions(-)
> 
> diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
> index b795f9c1941f..c80afa385532 100644
> --- a/drivers/platform/x86/asus-wmi.c
> +++ b/drivers/platform/x86/asus-wmi.c
> @@ -262,13 +262,13 @@ struct asus_wmi {
>  	u32 gpu_mux_dev;
>  
>  	/* Tunables provided by ASUS for gaming laptops */
> -	bool ppt_pl2_sppt_available;
> -	bool ppt_pl1_spl_available;
> -	bool ppt_apu_sppt_available;
> -	bool ppt_plat_sppt_available;
> -	bool ppt_fppt_available;
> -	bool nv_dyn_boost_available;
> -	bool nv_temp_tgt_available;
> +	u32 ppt_pl2_sppt;
> +	u32 ppt_pl1_spl;
> +	u32 ppt_apu_sppt;
> +	u32 ppt_platform_sppt;
> +	u32 ppt_fppt;
> +	u32 nv_dynamic_boost;
> +	u32 nv_temp_target;
>  
>  	u32 kbd_rgb_dev;
>  	bool kbd_rgb_state_available;
> @@ -1020,11 +1020,21 @@ static ssize_t ppt_pl2_sppt_store(struct device *dev,
>  		return -EIO;
>  	}
>  
> +	asus->ppt_pl2_sppt = value;
>  	sysfs_notify(&asus->platform_device->dev.kobj, NULL, "ppt_pl2_sppt");
>  
>  	return count;
>  }
> -static DEVICE_ATTR_WO(ppt_pl2_sppt);
> +
> +static ssize_t ppt_pl2_sppt_show(struct device *dev,
> +				       struct device_attribute *attr,
> +				       char *buf)
> +{
> +	struct asus_wmi *asus = dev_get_drvdata(dev);
> +
> +	return sysfs_emit(buf, "%d\n", asus->ppt_pl2_sppt);

Use %u for u32 values. This applies to all sysfs_emits in this patch.

-- 
 i.