crypto: ccp - create a generic psp-dev file

The PSP (Platform Security Processor) provides support for key management
commands in Secure Encrypted Virtualization (SEV) mode, along with
software-based Trusted Execution Environment (TEE) to enable third-party
Trusted Applications.

Therefore, introduce psp-dev.c and psp-dev.h files, which can invoke
SEV (or TEE) initialization based on platform feature support.

TEE interface support will be introduced in a later patch.

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Jens Wiklander <jens.wiklander@linaro.org>
Co-developed-by: Devaraj Rangasamy <Devaraj.Rangasamy@amd.com>
Signed-off-by: Devaraj Rangasamy <Devaraj.Rangasamy@amd.com>
Signed-off-by: Rijo Thomas <Rijo-john.Thomas@amd.com>
Acked-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 15 insertions, 21 deletions

diff --git a/drivers/crypto/ccp/sev-dev.h b/drivers/crypto/ccp/sev-dev.h
index e86164785daf..3d84ac380bdc 100644
--- a/drivers/crypto/ccp/sev-dev.h
+++ b/drivers/crypto/ccp/sev-dev.h
@@ -25,37 +25,25 @@
 #include <linux/miscdevice.h>
 #include <linux/capability.h>
 
-#include "sp-dev.h"
-
-#define PSP_CMD_COMPLETE		BIT(1)
-
-#define PSP_CMDRESP_CMD_SHIFT		16
-#define PSP_CMDRESP_IOC			BIT(0)
-#define PSP_CMDRESP_RESP		BIT(31)
-#define PSP_CMDRESP_ERR_MASK		0xffff
-
-#define MAX_PSP_NAME_LEN		16
+#define SEV_CMD_COMPLETE		BIT(1)
+#define SEV_CMDRESP_CMD_SHIFT		16
+#define SEV_CMDRESP_IOC			BIT(0)
 
 struct sev_misc_dev {
 	struct kref refcount;
 	struct miscdevice misc;
 };
 
-struct psp_device {
-	struct list_head entry;
-
-	struct psp_vdata *vdata;
-	char name[MAX_PSP_NAME_LEN];
-
+struct sev_device {
 	struct device *dev;
-	struct sp_device *sp;
+	struct psp_device *psp;
 
 	void __iomem *io_regs;
 
-	int sev_state;
-	unsigned int sev_int_rcvd;
-	wait_queue_head_t sev_int_queue;
-	struct sev_misc_dev *sev_misc;
+	int state;
+	unsigned int int_rcvd;
+	wait_queue_head_t int_queue;
+	struct sev_misc_dev *misc;
 	struct sev_user_data_status status_cmd_buf;
 	struct sev_data_init init_cmd_buf;
 
@@ -64,4 +52,10 @@ struct psp_device {
 	u8 build;
 };
 
+int sev_dev_init(struct psp_device *psp);
+void sev_dev_destroy(struct psp_device *psp);
+
+void sev_pci_init(void);
+void sev_pci_exit(void);
+
 #endif /* __SEV_DEV_H */