1What:		/sys/kernel/config/tsm/report/$name/inblob
 2Date:		September, 2023
 3KernelVersion:	v6.7
 4Contact:	linux-coco@lists.linux.dev
 5Description:
 6		(WO) Up to 64 bytes of user specified binary data. For replay
 7		protection this should include a nonce, but the kernel does not
 8		place any restrictions on the content.
 9
10What:		/sys/kernel/config/tsm/report/$name/outblob
11Date:		September, 2023
12KernelVersion:	v6.7
13Contact:	linux-coco@lists.linux.dev
14Description:
15		(RO) Binary attestation report generated from @inblob and other
16		options The format of the report is implementation specific
17		where the implementation is conveyed via the @provider
18		attribute.
19
20What:		/sys/kernel/config/tsm/report/$name/auxblob
21Date:		October, 2023
22KernelVersion:	v6.7
23Contact:	linux-coco@lists.linux.dev
24Description:
25		(RO) Optional supplemental data that a TSM may emit, visibility
26		of this attribute depends on TSM, and may be empty if no
27		auxiliary data is available.
28
29		When @provider is "sev_guest" this file contains the
30		"cert_table" from SEV-ES Guest-Hypervisor Communication Block
31		Standardization v2.03 Section 4.1.8.1 MSG_REPORT_REQ.
32		https://www.amd.com/content/dam/amd/en/documents/epyc-technical-docs/specifications/56421.pdf
33
34What:		/sys/kernel/config/tsm/report/$name/provider
35Date:		September, 2023
36KernelVersion:	v6.7
37Contact:	linux-coco@lists.linux.dev
38Description:
39		(RO) A name for the format-specification of @outblob like
40		"sev_guest" [1] or "tdx_guest" [2] in the near term, or a
41		common standard format in the future.
42
43		[1]: SEV Secure Nested Paging Firmware ABI Specification
44		Revision 1.55 Table 22
45		https://www.amd.com/content/dam/amd/en/documents/epyc-technical-docs/specifications/56860.pdf
46
47		[2]: Intel® Trust Domain Extensions Data Center Attestation
48		Primitives : Quote Generation Library and Quote Verification
49		Library Revision 0.8 Appendix 4,5
50		https://download.01.org/intel-sgx/latest/dcap-latest/linux/docs/Intel_TDX_DCAP_Quoting_Library_API.pdf
51
52What:		/sys/kernel/config/tsm/report/$name/generation
53Date:		September, 2023
54KernelVersion:	v6.7
55Contact:	linux-coco@lists.linux.dev
56Description:
57		(RO) The value in this attribute increments each time @inblob or
58		any option is written. Userspace can detect conflicts by
59		checking generation before writing to any attribute and making
60		sure the number of writes matches expectations after reading
61		@outblob, or it can prevent conflicts by creating a report
62		instance per requesting context.
63
64What:		/sys/kernel/config/tsm/report/$name/privlevel
65Date:		September, 2023
66KernelVersion:	v6.7
67Contact:	linux-coco@lists.linux.dev
68Description:
69		(WO) Attribute is visible if a TSM implementation provider
70		supports the concept of attestation reports for TVMs running at
71		different privilege levels, like SEV-SNP "VMPL", specify the
72		privilege level via this attribute.  The minimum acceptable
73		value is conveyed via @privlevel_floor and the maximum
74		acceptable value is TSM_PRIVLEVEL_MAX (3).
75
76What:		/sys/kernel/config/tsm/report/$name/privlevel_floor
77Date:		September, 2023
78KernelVersion:	v6.7
79Contact:	linux-coco@lists.linux.dev
80Description:
81		(RO) Indicates the minimum permissible value that can be written
82		to @privlevel.