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docs: tpm: Mention implemented TPM CRB interface emulation and specs

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Add a few sentences about the implemented emulation of the TPM CRB
interface and its specification.

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
This commit is contained in:
Stefan Berger 2018-10-30 17:33:53 -04:00
parent e2f246a50b
commit 7931cf3126
1 changed files with 15 additions and 0 deletions
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15
docs/specs/tpm.txt
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@ -20,6 +20,21 @@ QEMU files related to TPM TIS interface:
- hw/tpm/tpm_tis.h
QEMU also implements a TPM CRB interface following the Trusted Computing
Group's specification "TCG PC Client Platform TPM Profile (PTP)
Specification", Family "2.0", Level 00 Revision 01.03 v22, May 22, 2017.
This specification, or a later version of it, can be accessed from the
following URL:
https://trustedcomputinggroup.org/resource/pc-client-platform-tpm-profile-ptp-specification/
The CRB interface makes a memory mapped IO region in the area 0xfed40000 -
0xfed40fff (1 locality) available to the guest operating system.
QEMU files related to TPM CRB interface:
- hw/tpm/tpm_crb.c
= ACPI Interface =
The TPM device is defined with ACPI ID "PNP0C31". QEMU builds a SSDT and passes