linux-kernel - Re: [PATCH v3 1/3] platform/x86: think-lmi: Add certificate GUID structure

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Message-ID: <a5ecc59a-65bb-a270-9642-f2c59fc958ce@linux.intel.com>
Date: Thu, 28 Aug 2025 13:50:56 +0300 (EEST)
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: Mark Pearson <mpearson-lenovo@...ebb.ca>
cc: hansg@...nel.org, kean0048@...il.com, platform-driver-x86@...r.kernel.org, 
    LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 1/3] platform/x86: think-lmi: Add certificate GUID
 structure

On Mon, 25 Aug 2025, Mark Pearson wrote:

> Add a certificate GUID structure to make it easier to add different
> options for other platforms that need different GUIDs.
> 
> Suggested-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
> Signed-off-by: Mark Pearson <mpearson-lenovo@...ebb.ca>
> ---
> Changes in v2:
>  - split patch up into series
> Changes in v3:
>  - add field details to thinkpad_cert_guid declare.
>  - add missing comma
>  - Move null thumbprint GUID check to later in series
> 
>  drivers/platform/x86/lenovo/think-lmi.c | 38 +++++++++++++++++++------
>  1 file changed, 30 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/platform/x86/lenovo/think-lmi.c b/drivers/platform/x86/lenovo/think-lmi.c
> index 0992b41b6221..a22d25f6d3c6 100644
> --- a/drivers/platform/x86/lenovo/think-lmi.c
> +++ b/drivers/platform/x86/lenovo/think-lmi.c
> @@ -177,6 +177,28 @@ MODULE_PARM_DESC(debug_support, "Enable debug command support");
>  #define TLMI_CERT_SVC BIT(7) /* Admin Certificate Based */
>  #define TLMI_CERT_SMC BIT(8) /* System Certificate Based */
>  
> +struct tlmi_cert_guids {
> +	char *thumbprint;
> +	char *set_bios_setting;
> +	char *save_bios_setting;
> +	char *cert_to_password;
> +	char *clear_bios_cert;
> +	char *update_bios_cert;
> +	char *set_bios_cert;

const char

> +};
> +
> +static struct tlmi_cert_guids thinkpad_cert_guid = {

These are not supposed to be altered, right? If so, this should be const 
then.

> +	.thumbprint = LENOVO_CERT_THUMBPRINT_GUID,
> +	.set_bios_setting = LENOVO_SET_BIOS_SETTING_CERT_GUID,
> +	.save_bios_setting = LENOVO_SAVE_BIOS_SETTING_CERT_GUID,
> +	.cert_to_password = LENOVO_CERT_TO_PASSWORD_GUID,
> +	.clear_bios_cert = LENOVO_CLEAR_BIOS_CERT_GUID,
> +	.update_bios_cert = LENOVO_UPDATE_BIOS_CERT_GUID,
> +	.set_bios_cert = LENOVO_SET_BIOS_CERT_GUID,
> +};
> +
> +static struct tlmi_cert_guids *cert_guid = &thinkpad_cert_guid;

const here as well. Please also note my comment on placement of this in 
patch 2.

-- 
 i.