1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * AMD Platform Security Processor (PSP) interface driver
4  *
5  * Copyright (C) 2017-2019 Advanced Micro Devices, Inc.
6  *
7  * Author: Brijesh Singh <brijesh.singh@amd.com>
8  */
9 
10 #ifndef __PSP_DEV_H__
11 #define __PSP_DEV_H__
12 
13 #include <linux/device.h>
14 #include <linux/list.h>
15 #include <linux/bits.h>
16 #include <linux/interrupt.h>
17 
18 #include "sp-dev.h"
19 
20 #define PSP_CMDRESP_RESP		BIT(31)
21 #define PSP_CMDRESP_ERR_MASK		0xffff
22 
23 #define MAX_PSP_NAME_LEN		16
24 
25 extern struct psp_device *psp_master;
26 
27 typedef void (*psp_irq_handler_t)(int, void *, unsigned int);
28 
29 struct psp_device {
30 	struct list_head entry;
31 
32 	struct psp_vdata *vdata;
33 	char name[MAX_PSP_NAME_LEN];
34 
35 	struct device *dev;
36 	struct sp_device *sp;
37 
38 	void __iomem *io_regs;
39 
40 	psp_irq_handler_t sev_irq_handler;
41 	void *sev_irq_data;
42 
43 	psp_irq_handler_t tee_irq_handler;
44 	void *tee_irq_data;
45 
46 	void *sev_data;
47 	void *tee_data;
48 
49 	unsigned int capability;
50 };
51 
52 void psp_set_sev_irq_handler(struct psp_device *psp, psp_irq_handler_t handler,
53 			     void *data);
54 void psp_clear_sev_irq_handler(struct psp_device *psp);
55 
56 void psp_set_tee_irq_handler(struct psp_device *psp, psp_irq_handler_t handler,
57 			     void *data);
58 void psp_clear_tee_irq_handler(struct psp_device *psp);
59 
60 struct psp_device *psp_get_master_device(void);
61 
62 #define PSP_CAPABILITY_SEV			BIT(0)
63 #define PSP_CAPABILITY_TEE			BIT(1)
64 #define PSP_CAPABILITY_PSP_SECURITY_REPORTING	BIT(7)
65 
66 #define PSP_CAPABILITY_PSP_SECURITY_OFFSET	8
67 /*
68  * The PSP doesn't directly store these bits in the capability register
69  * but instead copies them from the results of query command.
70  *
71  * The offsets from the query command are below, and shifted when used.
72  */
73 #define PSP_SECURITY_FUSED_PART			BIT(0)
74 #define PSP_SECURITY_DEBUG_LOCK_ON		BIT(2)
75 #define PSP_SECURITY_TSME_STATUS		BIT(5)
76 #define PSP_SECURITY_ANTI_ROLLBACK_STATUS	BIT(7)
77 #define PSP_SECURITY_RPMC_PRODUCTION_ENABLED	BIT(8)
78 #define PSP_SECURITY_RPMC_SPIROM_AVAILABLE	BIT(9)
79 #define PSP_SECURITY_HSP_TPM_AVAILABLE		BIT(10)
80 #define PSP_SECURITY_ROM_ARMOR_ENFORCED		BIT(11)
81 
82 #endif /* __PSP_DEV_H */
83