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Linux kernel mirror (for testing)
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1What: /sys/bus/auxiliary/devices/intel_vsec.sdsi.X
2Date: Feb 2022
3KernelVersion: 5.18
4Contact: "David E. Box" <david.e.box@linux.intel.com>
5Description:
6 This directory contains interface files for accessing Intel
7 Software Defined Silicon (SDSi) features on a CPU. X
8 represents the socket instance (though not the socket ID).
9 The socket ID is determined by reading the registers file
10 and decoding it per the specification.
11
12 Some files communicate with SDSi hardware through a mailbox.
13 Should the operation fail, one of the following error codes
14 may be returned:
15
16 ========== =====
17 Error Code Cause
18 ========== =====
19 EIO General mailbox failure. Log may indicate cause.
20 EBUSY Mailbox is owned by another agent.
21 EPERM SDSI capability is not enabled in hardware.
22 EPROTO Failure in mailbox protocol detected by driver.
23 See log for details.
24 EOVERFLOW For provision commands, the size of the data
25 exceeds what may be written.
26 ESPIPE Seeking is not allowed.
27 ETIMEDOUT Failure to complete mailbox transaction in time.
28 ========== =====
29
30What: /sys/bus/auxiliary/devices/intel_vsec.sdsi.X/guid
31Date: Feb 2022
32KernelVersion: 5.18
33Contact: "David E. Box" <david.e.box@linux.intel.com>
34Description:
35 (RO) The GUID for the registers file. The GUID identifies
36 the layout of the registers file in this directory.
37 Information about the register layouts for a particular GUID
38 is available at http://github.com/intel/intel-sdsi
39
40What: /sys/bus/auxiliary/devices/intel_vsec.sdsi.X/registers
41Date: Feb 2022
42KernelVersion: 5.18
43Contact: "David E. Box" <david.e.box@linux.intel.com>
44Description:
45 (RO) Contains information needed by applications to provision
46 a CPU and monitor status information. The layout of this file
47 is determined by the GUID in this directory. Information about
48 the layout for a particular GUID is available at
49 http://github.com/intel/intel-sdsi
50
51What: /sys/bus/auxiliary/devices/intel_vsec.sdsi.X/provision_akc
52Date: Feb 2022
53KernelVersion: 5.18
54Contact: "David E. Box" <david.e.box@linux.intel.com>
55Description:
56 (WO) Used to write an Authentication Key Certificate (AKC) to
57 the SDSi NVRAM for the CPU. The AKC is used to authenticate a
58 Capability Activation Payload. Mailbox command.
59
60What: /sys/bus/auxiliary/devices/intel_vsec.sdsi.X/provision_cap
61Date: Feb 2022
62KernelVersion: 5.18
63Contact: "David E. Box" <david.e.box@linux.intel.com>
64Description:
65 (WO) Used to write a Capability Activation Payload (CAP) to the
66 SDSi NVRAM for the CPU. CAPs are used to activate a given CPU
67 feature. A CAP is validated by SDSi hardware using a previously
68 provisioned AKC file. Upon successful authentication, the CPU
69 configuration is updated. A cold reboot is required to fully
70 activate the feature. Mailbox command.
71
72What: /sys/bus/auxiliary/devices/intel_vsec.sdsi.X/state_certificate
73Date: Feb 2022
74KernelVersion: 5.18
75Contact: "David E. Box" <david.e.box@linux.intel.com>
76Description:
77 (RO) Used to read back the current State Certificate for the CPU
78 from SDSi hardware. The State Certificate contains information
79 about the current licenses on the CPU. Mailbox command.