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authorHook, Gary <Gary.Hook@amd.com>2019-07-09 18:07:15 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2019-07-26 15:08:03 +0300
commit93308baf075039dccf347391491773f272cc24f6 (patch)
tree83226deeda7724a9ae8db464c3d17a2d992b5cd8
parent91b05a7e7d8033a90a64f5fc0e3808db423e420a (diff)
downloadlinux-93308baf075039dccf347391491773f272cc24f6.tar.xz
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>
-rw-r--r--drivers/crypto/ccp/Kconfig8
-rw-r--r--drivers/crypto/ccp/Makefile4
-rw-r--r--drivers/crypto/ccp/ccp-dev-v5.c4
3 files changed, 14 insertions, 2 deletions
diff --git a/drivers/crypto/ccp/Kconfig b/drivers/crypto/ccp/Kconfig
index ce1c47286fc6..8fec733f567f 100644
--- a/drivers/crypto/ccp/Kconfig
+++ b/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.
diff --git a/drivers/crypto/ccp/Makefile b/drivers/crypto/ccp/Makefile
index 51d1c0cf66c7..6b86f1e6d634 100644
--- a/drivers/crypto/ccp/Makefile
+++ b/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
diff --git a/drivers/crypto/ccp/ccp-dev-v5.c b/drivers/crypto/ccp/ccp-dev-v5.c
index 217e41bbadaf..35b3d866726d 100644
--- a/drivers/crypto/ccp/ccp-dev-v5.c
+++ b/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);