Linux kernel mirror (for testing)
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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 __SEV_DEV_H__
11#define __SEV_DEV_H__
12
13#include <linux/device.h>
14#include <linux/spinlock.h>
15#include <linux/mutex.h>
16#include <linux/list.h>
17#include <linux/wait.h>
18#include <linux/dmapool.h>
19#include <linux/hw_random.h>
20#include <linux/bitops.h>
21#include <linux/interrupt.h>
22#include <linux/irqreturn.h>
23#include <linux/dmaengine.h>
24#include <linux/psp-sev.h>
25#include <linux/miscdevice.h>
26#include <linux/capability.h>
27
28#define SEV_CMDRESP_CMD GENMASK(26, 16)
29#define SEV_CMD_COMPLETE BIT(1)
30#define SEV_CMDRESP_IOC BIT(0)
31
32struct sev_misc_dev {
33 struct kref refcount;
34 struct miscdevice misc;
35};
36
37struct sev_tio_status;
38
39struct sev_device {
40 struct device *dev;
41 struct psp_device *psp;
42
43 void __iomem *io_regs;
44
45 struct sev_vdata *vdata;
46
47 unsigned int int_rcvd;
48 wait_queue_head_t int_queue;
49 struct sev_misc_dev *misc;
50
51 u8 api_major;
52 u8 api_minor;
53 u8 build;
54
55 void *cmd_buf;
56 void *cmd_buf_backup;
57 bool cmd_buf_active;
58 bool cmd_buf_backup_active;
59
60 bool snp_initialized;
61
62 struct sev_user_data_status sev_plat_status;
63
64 struct sev_user_data_snp_status snp_plat_status;
65 struct snp_feature_info snp_feat_info_0;
66
67 struct tsm_dev *tsmdev;
68 struct sev_tio_status *tio_status;
69};
70
71int sev_dev_init(struct psp_device *psp);
72void sev_dev_destroy(struct psp_device *psp);
73
74int __sev_do_cmd_locked(int cmd, void *data, int *psp_ret);
75
76void sev_pci_init(void);
77void sev_pci_exit(void);
78
79struct page *snp_alloc_hv_fixed_pages(unsigned int num_2mb_pages);
80void snp_free_hv_fixed_pages(struct page *page);
81
82void sev_tsm_init_locked(struct sev_device *sev, void *tio_status_page);
83void sev_tsm_uninit(struct sev_device *sev);
84int sev_tio_cmd_buffer_len(int cmd);
85
86#endif /* __SEV_DEV_H */