[1/7] crypto: ccp: Move dev_info/err messages for SEV/SNP initialization

Commit Message

Ashish Kalra Dec. 9, 2024, 11:24 p.m. UTC

From: Ashish Kalra <[e-mail]>

Remove dev_info and dev_err messages related to SEV/SNP initialization
from callers and instead move those inside __sev_platform_init_locked()
and __sev_snp_init_locked().

This allows both _sev_platform_init_locked() and various SEV/SNP ioctls
to call __sev_platform_init_locked() and __sev_snp_init_locked() for
implicit SEV/SNP initialization and shutdown without additionally
printing any errors/success messages.

Signed-off-by: Ashish Kalra <[e-mail]>
---
 drivers/crypto/ccp/sev-dev.c | 26 +++++++++++++++++++-------
 1 file changed, 19 insertions(+), 7 deletions(-)

Comments

Dionna Amalie Glaze Dec. 10, 2024, 3:51 p.m. UTC | #1

>
>  static int _sev_platform_init_locked(struct sev_platform_init_args *args)
> @@ -1329,8 +1342,7 @@ static int _sev_platform_init_locked(struct sev_platform_init_args *args)
>                  * Don't abort the probe if SNP INIT failed,
>                  * continue to initialize the legacy SEV firmware.
>                  */
> -               dev_err(sev->dev, "SEV-SNP: failed to INIT rc %d, error %#x\n",
> -                       rc, args->error);
> +               dev_info(sev->dev, "SEV-SNP: failed, continue to INIT SEV firmware\n");

You don't necessarily continue to INIT SEV if args->probe &&
!psp_init_on_probe, so this may be misleading.

>         }
>
>         /* Defer legacy SEV/SEV-ES support if allowed by caller/module. */
> --
> 2.34.1
>

Patch

diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c
index af018afd9cd7..a17796729725 100644
--- a/drivers/crypto/ccp/sev-dev.c
+++ b/drivers/crypto/ccp/sev-dev.c
@@ -1177,19 +1177,27 @@  static int __sev_snp_init_locked(int *error)
 
 	rc = __sev_do_cmd_locked(cmd, arg, error);
 	if (rc)
-		return rc;
+		goto err;
 
 	/* Prepare for first SNP guest launch after INIT. */
 	wbinvd_on_all_cpus();
 	rc = __sev_do_cmd_locked(SEV_CMD_SNP_DF_FLUSH, NULL, error);
 	if (rc)
-		return rc;
+		goto err;
 
 	sev->snp_initialized = true;
 	dev_dbg(sev->dev, "SEV-SNP firmware initialized\n");
 
+	dev_info(sev->dev, "SEV-SNP API:%d.%d build:%d\n", sev->api_major,
+		 sev->api_minor, sev->build);
+
 	sev_es_tmr_size = SNP_TMR_SIZE;
 
+	return 0;
+
+err:
+	dev_err(sev->dev, "SEV-SNP: failed to INIT rc %d, error %#x\n",
+		rc, *error);
 	return rc;
 }
 
@@ -1268,7 +1276,7 @@  static int __sev_platform_init_locked(int *error)
 
 	rc = __sev_platform_init_handle_init_ex_path(sev);
 	if (rc)
-		return rc;
+		goto err;
 
 	rc = __sev_do_init_locked(&psp_ret);
 	if (rc && psp_ret == SEV_RET_SECURE_DATA_INVALID) {
@@ -1288,7 +1296,7 @@  static int __sev_platform_init_locked(int *error)
 		*error = psp_ret;
 
 	if (rc)
-		return rc;
+		goto err;
 
 	sev->state = SEV_STATE_INIT;
 
@@ -1296,7 +1304,7 @@  static int __sev_platform_init_locked(int *error)
 	wbinvd_on_all_cpus();
 	rc = __sev_do_cmd_locked(SEV_CMD_DF_FLUSH, NULL, error);
 	if (rc)
-		return rc;
+		goto err;
 
 	dev_dbg(sev->dev, "SEV firmware initialized\n");
 
@@ -1304,6 +1312,11 @@  static int __sev_platform_init_locked(int *error)
 		 sev->api_minor, sev->build);
 
 	return 0;
+
+err:
+	dev_err(sev->dev, "SEV: failed to INIT error %#x, rc %d\n",
+		psp_ret, rc);
+	return rc;
 }
 
 static int _sev_platform_init_locked(struct sev_platform_init_args *args)
@@ -1329,8 +1342,7 @@  static int _sev_platform_init_locked(struct sev_platform_init_args *args)
 		 * Don't abort the probe if SNP INIT failed,
 		 * continue to initialize the legacy SEV firmware.
 		 */
-		dev_err(sev->dev, "SEV-SNP: failed to INIT rc %d, error %#x\n",
-			rc, args->error);
+		dev_info(sev->dev, "SEV-SNP: failed, continue to INIT SEV firmware\n");
 	}
 
 	/* Defer legacy SEV/SEV-ES support if allowed by caller/module. */