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[Qemu-devel] [PATCH v3 00/13] tpm: Extend TPM with state migration suppo
From: |
Stefan Berger |
Subject: |
[Qemu-devel] [PATCH v3 00/13] tpm: Extend TPM with state migration support (not 2.11) |
Date: |
Fri, 10 Nov 2017 09:11:39 -0500 |
This set of patches implements support for migrating the state of the
external 'swtpm' TPM emulator as well as that of the emulated device
interfaces. I have primarily tested this with the TIS and TPM 1.2 so
far, but it also seems to work with TPM 2.
The TIS is simplified first by reducing the number of buffers and read
and write offsets into these buffers. Following the state machine of the
TIS, a single buffer and r/w offset is enough for all localities since
only one locality can ever be active.
This series applies on top of my tpm-next branch.
One of the challenges that is addressed by this set of patches is the fact
that the TPM emulator may be processing a command while the state
serialization of the devices is supposed to happen. A necessary first step
has been implemented here that ensures that a response has been received
from the exernal emulator and the bottom half function, which delivers the
response and adjusts device registers (TIS or CRB), has been executed,
before the device's state is serialized.
A subsequent extension may need to address the live migration loop and delay
the serialization of devices until the response from the external TPM has
been received. Though the likelihood that someone executes a long-lasting
TPM command while this is occurring is certainly rare.
Stefan
Stefan Berger (13):
tpm_tis: convert uint32_t to size_t
tpm_tis: limit size of buffer from backend
tpm_tis: remove TPMSizeBuffer usage
tpm_tis: move buffers from localities into common location
tpm_tis: merge read and write buffer into single buffer
tpm_tis: move r/w_offsets to TPMState
tpm_tis: merge r/w_offset into rw_offset
tpm: Implement tpm_sized_buffer_reset
tpm: Introduce condition to notify waiters of completed command
tpm: Introduce condition in TPM backend for notification
tpm: implement tpm_backend_wait_cmd_completed
tpm: extend TPM emulator with state migration support
tpm_tis: extend TPM TIS with state migration support
backends/tpm.c | 29 +++++
hw/tpm/tpm_emulator.c | 303 +++++++++++++++++++++++++++++++++++++++++--
hw/tpm/tpm_tis.c | 216 +++++++++++++++++-------------
hw/tpm/tpm_util.c | 7 +
hw/tpm/tpm_util.h | 7 +
include/sysemu/tpm_backend.h | 22 ++++
6 files changed, 483 insertions(+), 101 deletions(-)
--
2.5.5
- [Qemu-devel] [PATCH v3 00/13] tpm: Extend TPM with state migration support (not 2.11),
Stefan Berger <=
- [Qemu-devel] [PATCH v3 01/13] tpm_tis: convert uint32_t to size_t, Stefan Berger, 2017/11/10
- [Qemu-devel] [PATCH v3 02/13] tpm_tis: limit size of buffer from backend, Stefan Berger, 2017/11/10
- [Qemu-devel] [PATCH v3 04/13] tpm_tis: move buffers from localities into common location, Stefan Berger, 2017/11/10
- [Qemu-devel] [PATCH v3 07/13] tpm_tis: merge r/w_offset into rw_offset, Stefan Berger, 2017/11/10
- [Qemu-devel] [PATCH v3 06/13] tpm_tis: move r/w_offsets to TPMState, Stefan Berger, 2017/11/10
- [Qemu-devel] [PATCH v3 09/13] tpm: Introduce condition to notify waiters of completed command, Stefan Berger, 2017/11/10
- [Qemu-devel] [PATCH v3 05/13] tpm_tis: merge read and write buffer into single buffer, Stefan Berger, 2017/11/10
- [Qemu-devel] [PATCH v3 08/13] tpm: Implement tpm_sized_buffer_reset, Stefan Berger, 2017/11/10
- [Qemu-devel] [PATCH v3 12/13] tpm: extend TPM emulator with state migration support, Stefan Berger, 2017/11/10
- [Qemu-devel] [PATCH v3 03/13] tpm_tis: remove TPMSizeBuffer usage, Stefan Berger, 2017/11/10