crypto: ccp - Make CCP debugfs support optional

Add a config option to exclude DebugFS support in the CCP driver.

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/ccp/Kconfig

@@ -46,3 +46,11 @@ config CRYPTO_DEV_SP_PSP
 	 management commands in Secure Encrypted Virtualization (SEV) mode,
 	 along with software-based Trusted Execution Environment (TEE) to
 	 enable third-party trusted applications.
+
+config CRYPTO_DEV_CCP_DEBUGFS
+	bool "Enable CCP Internals in DebugFS"
+	default n
+	depends on CRYPTO_DEV_SP_CCP
+	help
+	  Expose CCP device information such as operation statistics, feature
+	  information, and descriptor queue contents.

drivers/crypto/ccp/Makefile

@@ -5,8 +5,8 @@ ccp-$(CONFIG_CRYPTO_DEV_SP_CCP) += ccp-dev.o \
 	    ccp-ops.o \
 	    ccp-dev-v3.o \
 	    ccp-dev-v5.o \
-	    ccp-dmaengine.o \
-	    ccp-debugfs.o
+	    ccp-dmaengine.o
+ccp-$(CONFIG_CRYPTO_DEV_CCP_DEBUGFS) += ccp-debugfs.o
 ccp-$(CONFIG_PCI) += sp-pci.o
 ccp-$(CONFIG_CRYPTO_DEV_SP_PSP) += psp-dev.o
 

drivers/crypto/ccp/ccp-dev-v5.c

@@ -970,8 +970,10 @@ static int ccp5_init(struct ccp_device *ccp)
 	if (ret)
 		goto e_hwrng;
 
+#ifdef CONFIG_CRYPTO_DEV_CCP_DEBUGFS
 	/* Set up debugfs entries */
 	ccp5_debugfs_setup(ccp);
+#endif
 
 	return 0;
 
@@ -1009,11 +1011,13 @@ static void ccp5_destroy(struct ccp_device *ccp)
 	/* Remove this device from the list of available units first */
 	ccp_del_device(ccp);
 
+#ifdef CONFIG_CRYPTO_DEV_CCP_DEBUGFS
 	/* We're in the process of tearing down the entire driver;
 	 * when all the devices are gone clean up debugfs
 	 */
 	if (ccp_present())
 		ccp5_debugfs_destroy();
+#endif
 
 	/* Disable and clear interrupts */
 	ccp5_disable_queue_interrupts(ccp);