linux-kernel - Re: [PATCH 2/2] crypto/ccp: narrow scope of snp_range

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Message-ID: <620951cd-af90-46ca-83e8-5d9f625ecfbf@amd.com>
Date: Mon, 5 Jan 2026 11:43:17 -0600
From: Tom Lendacky <thomas.lendacky@....com>
To: Tycho Andersen <tycho@...nel.org>, Ashish Kalra <ashish.kalra@....com>,
 John Allen <john.allen@....com>, Herbert Xu <herbert@...dor.apana.org.au>,
 "David S . Miller" <davem@...emloft.net>
Cc: linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
 Alexey Kardashevskiy <aik@....com>
Subject: Re: [PATCH 2/2] crypto/ccp: narrow scope of snp_range_list

On 1/5/26 11:22, Tycho Andersen wrote:
> From: "Tycho Andersen (AMD)" <tycho@...nel.org>
> 
> snp_range_list is only used in __sev_snp_init_locked() in the SNP_INIT_EX
> case, move the declaration there and add a __free() cleanup helper for it
> instead of waiting until shutdown.
> 
> Fixes: 1ca5614b84ee ("crypto: ccp: Add support to initialize the AMD-SP for SEV-SNP")
> Reviewed-by: Alexey Kardashevskiy <aik@....com>
> Signed-off-by: Tycho Andersen (AMD) <tycho@...nel.org>

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

> ---
>  drivers/crypto/ccp/sev-dev.c | 13 +------------
>  1 file changed, 1 insertion(+), 12 deletions(-)
> 
> diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c
> index 6e6011e363e3..1cdadddb744e 100644
> --- a/drivers/crypto/ccp/sev-dev.c
> +++ b/drivers/crypto/ccp/sev-dev.c
> @@ -127,13 +127,6 @@ static size_t sev_es_tmr_size = SEV_TMR_SIZE;
>  #define NV_LENGTH (32 * 1024)
>  static void *sev_init_ex_buffer;
>  
> -/*
> - * SEV_DATA_RANGE_LIST:
> - *   Array containing range of pages that firmware transitions to HV-fixed
> - *   page state.
> - */
> -static struct sev_data_range_list *snp_range_list;
> -
>  static void __sev_firmware_shutdown(struct sev_device *sev, bool panic);
>  
>  static int snp_shutdown_on_panic(struct notifier_block *nb,
> @@ -1361,6 +1354,7 @@ static int snp_filter_reserved_mem_regions(struct resource *rs, void *arg)
>  
>  static int __sev_snp_init_locked(int *error, unsigned int max_snp_asid)
>  {
> +	struct sev_data_range_list *snp_range_list __free(kfree) = NULL;
>  	struct psp_device *psp = psp_master;
>  	struct sev_data_snp_init_ex data;
>  	struct sev_device *sev;
> @@ -2780,11 +2774,6 @@ static void __sev_firmware_shutdown(struct sev_device *sev, bool panic)
>  		sev_init_ex_buffer = NULL;
>  	}
>  
> -	if (snp_range_list) {
> -		kfree(snp_range_list);
> -		snp_range_list = NULL;
> -	}
> -
>  	__sev_snp_shutdown_locked(&error, panic);
>  }
>