crypto: ccp - Add additional information about an SEV firmware upgrade

Print additional information, in the form of the old and new versions of
the SEV firmware, so that it can be seen what the base firmware was before
the upgrade.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Ashish Kalra <ashish.kalra@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/ccp/sev-dev.c

@@ -1629,8 +1629,6 @@ static int sev_update_firmware(struct device *dev)
 
 	if (ret)
 		dev_dbg(dev, "Failed to update SEV firmware: %#x\n", error);
-	else
-		dev_info(dev, "SEV firmware update successful\n");
 
 	__free_pages(p, order);
 
@@ -2382,6 +2380,7 @@ void sev_pci_init(void)
 {
 	struct sev_device *sev = psp_master->sev_data;
 	struct sev_platform_init_args args = {0};
+	u8 api_major, api_minor, build;
 	int rc;
 
 	if (!sev)
@@ -2392,9 +2391,19 @@ void sev_pci_init(void)
 	if (sev_get_api_version())
 		goto err;
 
+	api_major = sev->api_major;
+	api_minor = sev->api_minor;
+	build     = sev->build;
+
 	if (sev_update_firmware(sev->dev) == 0)
 		sev_get_api_version();
 
+	if (api_major != sev->api_major || api_minor != sev->api_minor ||
+	    build != sev->build)
+		dev_info(sev->dev, "SEV firmware updated from %d.%d.%d to %d.%d.%d\n",
+			 api_major, api_minor, build,
+			 sev->api_major, sev->api_minor, sev->build);
+
 	/* Initialize the platform */
 	args.probe = true;
 	rc = sev_platform_init(&args);