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

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Message-ID: <20260105172218.39993-2-tycho@kernel.org>
Date: Mon,  5 Jan 2026 10:22:18 -0700
From: Tycho Andersen <tycho@...nel.org>
To: Ashish Kalra <ashish.kalra@....com>,
	Tom Lendacky <thomas.lendacky@....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,
	"Tycho Andersen (AMD)" <tycho@...nel.org>,
	Alexey Kardashevskiy <aik@....com>
Subject: [PATCH 2/2] crypto/ccp: narrow scope of snp_range_list

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>
---
 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);
 }
 
-- 
2.52.0