1 What: /sys/firmware/secvar
2 Date: August 2019
3 Contact: Nayna Jain <nayna@linux.ibm.com
4 Description: This directory is created if t
5 secureboot, thereby secure var
6 for reading/writing the secure
7
8 What: /sys/firmware/secvar/vars
9 Date: August 2019
10 Contact: Nayna Jain <nayna@linux.ibm.com
11 Description: This directory lists all the s
12 by the firmware.
13
14 What: /sys/firmware/secvar/format
15 Date: August 2019
16 Contact: Nayna Jain <nayna@linux.ibm.com
17 Description: A string indicating which back
18 This determines the format of
19 format of variable updates.
20
21 On powernv/OPAL, this value is
22 and is expected to be "ibm,edk
23
24 On pseries/PLPKS, this is gene
25 version number in the SB_VERSI
26 has the form "ibm,plpks-sb-v<v
27 "ibm,plpks-sb-unknown" if ther
28
29 What: /sys/firmware/secvar/vars/<var
30 Date: August 2019
31 Contact: Nayna Jain <nayna@linux.ibm.com
32 Description: Each secure variable is repres
33 <variable_name>. The variable
34 representation. The data and s
35 their respective attribute fil
36
37 What: /sys/firmware/secvar/vars/<var
38 Date: August 2019
39 Contact: Nayna Jain <nayna@linux.ibm.com
40 Description: An integer representation of t
41 variable. In other words, it r
42
43 What: /sys/firmware/secvar/vars/<var
44 Date: August 2019
45 Contact: Nayna Jain <nayna@linux.ibm.com
46 Description: A read-only file containing th
47 of the file represents the max
48
49 What: /sys/firmware/secvar/vars/<var
50 Date: August 2019
51 Contact: Nayna Jain <nayna@linux.ibm.com
52 Description: A write-only file that is used
53 variable. The size of the file
54 the variable data that can be
55
56 What: /sys/firmware/secvar/config
57 Date: February 2023
58 Contact: Nayna Jain <nayna@linux.ibm.com
59 Description: This optional directory contai
60 defined by the secure variable
61 ASCII format. The directory is
62 implementation provides variab
63 present is only PLPKS on the p
64
65 What: /sys/firmware/secvar/config/ve
66 Date: February 2023
67 Contact: Nayna Jain <nayna@linux.ibm.com
68 Description: Config version as reported by
69 format.
70
71 Currently only provided by PLP
72
73 What: /sys/firmware/secvar/config/ma
74 Date: February 2023
75 Contact: Nayna Jain <nayna@linux.ibm.com
76 Description: Maximum allowed size of object
77 represented in ASCII decimal f
78
79 This is not necessarily the sa
80 written to an update file as w
81 object data, you should use th
82 that purpose.
83
84 Currently only provided by PLP
85
86 What: /sys/firmware/secvar/config/to
87 Date: February 2023
88 Contact: Nayna Jain <nayna@linux.ibm.com
89 Description: Total size of the PLPKS in byt
90 format.
91
92 Currently only provided by PLP
93
94 What: /sys/firmware/secvar/config/us
95 Date: February 2023
96 Contact: Nayna Jain <nayna@linux.ibm.com
97 Description: Current space consumed by the
98 in ASCII decimal format.
99
100 Currently only provided by PLP
101
102 What: /sys/firmware/secvar/config/su
103 Date: February 2023
104 Contact: Nayna Jain <nayna@linux.ibm.com
105 Description: Bitmask of supported policy fl
106 represented as an 8 byte hexad
107 hypervisor documentation for w
108
109 Currently only provided by PLP
110
111 What: /sys/firmware/secvar/config/si
112 Date: February 2023
113 Contact: Nayna Jain <nayna@linux.ibm.com
114 Description: Bitmask of flags indicating wh
115 supports for signed update of
116 hexadecimal ASCII string. Cons
117 for what these flags mean.
118
119 Currently only provided by PLP
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