From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:32945) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eDA2X-0003sg-H9 for qemu-devel@nongnu.org; Fri, 10 Nov 2017 09:12:18 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eDA2S-0004nQ-Jj for qemu-devel@nongnu.org; Fri, 10 Nov 2017 09:12:13 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:46562) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eDA2S-0004iL-7x for qemu-devel@nongnu.org; Fri, 10 Nov 2017 09:12:08 -0500 Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id vAAEB4er065311 for ; Fri, 10 Nov 2017 09:12:01 -0500 Received: from e35.co.us.ibm.com (e35.co.us.ibm.com [32.97.110.153]) by mx0a-001b2d01.pphosted.com with ESMTP id 2e5a22anmu-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Fri, 10 Nov 2017 09:12:00 -0500 Received: from localhost by e35.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 10 Nov 2017 07:11:59 -0700 From: Stefan Berger Date: Fri, 10 Nov 2017 09:11:39 -0500 Message-Id: <1510323112-2207-1-git-send-email-stefanb@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH v3 00/13] tpm: Extend TPM with state migration support (not 2.11) List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, marcandre.lureau@redhat.com Cc: amarnath.valluri@intel.com, Stefan Berger 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