Re: [PATCH v4 1/5] crypto: ccp: New bit-field definitions for SNP_PLATFORM_STATUS command

[Tom Lendacky]

On 5/19/25 18:56, Ashish Kalra wrote:
> From: Ashish Kalra <ashish.kalra@xxxxxxx>
> 
> Define new bit-field definitions returned by SNP_PLATFORM_STATUS command
> such as new capabilities like SNP_FEATURE_INFO command availability,
> ciphertext hiding enabled and capability.
> 
> Signed-off-by: Ashish Kalra <ashish.kalra@xxxxxxx>

Reviewed-by: Tom Lendacky <thomas.lendacky@xxxxxxx>

> ---
>  include/uapi/linux/psp-sev.h | 10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/include/uapi/linux/psp-sev.h b/include/uapi/linux/psp-sev.h
> index eeb20dfb1fda..c2fd324623c4 100644
> --- a/include/uapi/linux/psp-sev.h
> +++ b/include/uapi/linux/psp-sev.h
> @@ -185,6 +185,10 @@ struct sev_user_data_get_id2 {
>   * @mask_chip_id: whether chip id is present in attestation reports or not
>   * @mask_chip_key: whether attestation reports are signed or not
>   * @vlek_en: VLEK (Version Loaded Endorsement Key) hashstick is loaded
> + * @feature_info: whether SNP_FEATURE_INFO command is available
> + * @rapl_dis: whether RAPL is disabled
> + * @ciphertext_hiding_cap: whether platform has ciphertext hiding capability
> + * @ciphertext_hiding_en: whether ciphertext hiding is enabled
>   * @rsvd1: reserved
>   * @guest_count: the number of guest currently managed by the firmware
>   * @current_tcb_version: current TCB version
> @@ -200,7 +204,11 @@ struct sev_user_data_snp_status {
>  	__u32 mask_chip_id:1;		/* Out */
>  	__u32 mask_chip_key:1;		/* Out */
>  	__u32 vlek_en:1;		/* Out */
> -	__u32 rsvd1:29;
> +	__u32 feature_info:1;		/* Out */
> +	__u32 rapl_dis:1;		/* Out */
> +	__u32 ciphertext_hiding_cap:1;	/* Out */
> +	__u32 ciphertext_hiding_en:1;	/* Out */
> +	__u32 rsvd1:25;
>  	__u32 guest_count;		/* Out */
>  	__u64 current_tcb_version;	/* Out */
>  	__u64 reported_tcb_version;	/* Out */