Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0-only */
2#ifndef __PSP_SEV_TIO_H__
3#define __PSP_SEV_TIO_H__
4
5#include <linux/pci-tsm.h>
6#include <linux/pci-ide.h>
7#include <linux/tsm.h>
8#include <uapi/linux/psp-sev.h>
9
10struct sla_addr_t {
11 union {
12 u64 sla;
13 struct {
14 u64 page_type :1,
15 page_size :1,
16 reserved1 :10,
17 pfn :40,
18 reserved2 :12;
19 };
20 };
21} __packed;
22
23#define SEV_TIO_MAX_COMMAND_LENGTH 128
24
25/* SPDM control structure for DOE */
26struct tsm_spdm {
27 unsigned long req_len;
28 void *req;
29 unsigned long rsp_len;
30 void *rsp;
31};
32
33/* Describes TIO device */
34struct tsm_dsm_tio {
35 u8 cert_slot;
36 struct sla_addr_t dev_ctx;
37 struct sla_addr_t req;
38 struct sla_addr_t resp;
39 struct sla_addr_t scratch;
40 struct sla_addr_t output;
41 size_t output_len;
42 size_t scratch_len;
43 struct tsm_spdm spdm;
44 struct sla_buffer_hdr *reqbuf; /* vmap'ed @req for DOE */
45 struct sla_buffer_hdr *respbuf; /* vmap'ed @resp for DOE */
46
47 int cmd;
48 int psp_ret;
49 u8 cmd_data[SEV_TIO_MAX_COMMAND_LENGTH];
50 void *data_pg; /* Data page for DEV_STATUS/TDI_STATUS/TDI_INFO/ASID_FENCE */
51
52#define TIO_IDE_MAX_TC 8
53 struct pci_ide *ide[TIO_IDE_MAX_TC];
54};
55
56/* Describes TSM structure for PF0 pointed by pci_dev->tsm */
57struct tio_dsm {
58 struct pci_tsm_pf0 tsm;
59 struct tsm_dsm_tio data;
60 struct sev_device *sev;
61};
62
63/* Data object IDs */
64#define SPDM_DOBJ_ID_NONE 0
65#define SPDM_DOBJ_ID_REQ 1
66#define SPDM_DOBJ_ID_RESP 2
67
68struct spdm_dobj_hdr {
69 u32 id; /* Data object type identifier */
70 u32 length; /* Length of the data object, INCLUDING THIS HEADER */
71 struct { /* Version of the data object structure */
72 u8 minor;
73 u8 major;
74 } version;
75} __packed;
76
77/**
78 * struct sev_tio_status - TIO_STATUS command's info_paddr buffer
79 *
80 * @length: Length of this structure in bytes
81 * @tio_en: Indicates that SNP_INIT_EX initialized the RMP for SEV-TIO
82 * @tio_init_done: Indicates TIO_INIT has been invoked
83 * @spdm_req_size_min: Minimum SPDM request buffer size in bytes
84 * @spdm_req_size_max: Maximum SPDM request buffer size in bytes
85 * @spdm_scratch_size_min: Minimum SPDM scratch buffer size in bytes
86 * @spdm_scratch_size_max: Maximum SPDM scratch buffer size in bytes
87 * @spdm_out_size_min: Minimum SPDM output buffer size in bytes
88 * @spdm_out_size_max: Maximum for the SPDM output buffer size in bytes
89 * @spdm_rsp_size_min: Minimum SPDM response buffer size in bytes
90 * @spdm_rsp_size_max: Maximum SPDM response buffer size in bytes
91 * @devctx_size: Size of a device context buffer in bytes
92 * @tdictx_size: Size of a TDI context buffer in bytes
93 * @tio_crypto_alg: TIO crypto algorithms supported
94 */
95struct sev_tio_status {
96 u32 length;
97 u32 tio_en :1,
98 tio_init_done :1,
99 reserved :30;
100 u32 spdm_req_size_min;
101 u32 spdm_req_size_max;
102 u32 spdm_scratch_size_min;
103 u32 spdm_scratch_size_max;
104 u32 spdm_out_size_min;
105 u32 spdm_out_size_max;
106 u32 spdm_rsp_size_min;
107 u32 spdm_rsp_size_max;
108 u32 devctx_size;
109 u32 tdictx_size;
110 u32 tio_crypto_alg;
111 u8 reserved2[12];
112} __packed;
113
114int sev_tio_init_locked(void *tio_status_page);
115int sev_tio_continue(struct tsm_dsm_tio *dev_data);
116
117int sev_tio_dev_create(struct tsm_dsm_tio *dev_data, u16 device_id, u16 root_port_id,
118 u8 segment_id);
119int sev_tio_dev_connect(struct tsm_dsm_tio *dev_data, u8 tc_mask, u8 ids[8], u8 cert_slot);
120int sev_tio_dev_disconnect(struct tsm_dsm_tio *dev_data, bool force);
121int sev_tio_dev_reclaim(struct tsm_dsm_tio *dev_data);
122
123#endif /* __PSP_SEV_TIO_H__ */