On 07/18/2017 04:49 AM, Amarnath Valluri wrote:
diff --git a/hw/tpm/Makefile.objs b/hw/tpm/Makefile.objs index 64cecc3..41f0b7a 100644 --- a/hw/tpm/Makefile.objs +++ b/hw/tpm/Makefile.objs @@ -1,2 +1,3 @@ common-obj-$(CONFIG_TPM_TIS) += tpm_tis.o common-obj-$(CONFIG_TPM_PASSTHROUGH) += tpm_passthrough.o tpm_util.o +common-obj-$(CONFIG_TPM_EMULATOR) += tpm_emulator.o tpm_util.o diff --git a/hw/tpm/tpm_emulator.c b/hw/tpm/tpm_emulator.c new file mode 100644 index 0000000..c90914c --- /dev/null +++ b/hw/tpm/tpm_emulator.c @@ -0,0 +1,973 @@ +/* + * emulator TPM driver + * + * Copyright (c) 2017 Intel Corporation + * Author: Amarnath Valluri <amarnath.vall...@intel.com> + * + * Copyright (c) 2010 - 2013 IBM Corporation + * Authors: + * Stefan Berger <stef...@us.ibm.com> + * + * Copyright (C) 2011 IAIK, Graz University of Technology + * Author: Andreas Niederl + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see <http://www.gnu.org/licenses/> + * + */ + +#include "qemu/osdep.h" +#include "qemu/error-report.h" +#include "qemu/sockets.h" +#include "io/channel-socket.h" +#include "sysemu/tpm_backend.h" +#include "tpm_int.h" +#include "hw/hw.h" +#include "hw/i386/pc.h" +#include "tpm_util.h" +#include "tpm_ioctl.h" +#include "migration/migration.h" +#include "qapi/error.h" + +#include <fcntl.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <stdio.h> + +#define DEBUG_TPM 0 + +#define DPRINT(fmt, ...) do { \ + if (DEBUG_TPM) { \ + fprintf(stderr, fmt, ## __VA_ARGS__); \ + } \ +} while (0); + +#define DPRINTF(fmt, ...) DPRINT("tpm-emulator: "fmt"\n", __VA_ARGS__) + +#define TYPE_TPM_EMULATOR "tpm-emulator" +#define TPM_EMULATOR(obj) \ + OBJECT_CHECK(TPMEmulator, (obj), TYPE_TPM_EMULATOR) + +static const TPMDriverOps tpm_emulator_driver; + +/* data structures */ +typedef struct TPMEmulator { + TPMBackend parent; + + TPMEmulatorOptions *ops; + QIOChannel *data_ioc; + QIOChannel *ctrl_ioc; + bool op_executing; + bool op_canceled; + bool child_running; + TPMVersion tpm_version; + ptm_cap caps; /* capabilities of the TPM */ + uint8_t cur_locty_number; /* last set locality */ + QemuMutex state_lock; + Error *migration_blocker; +} TPMEmulator; + +#define TPM_DEFAULT_EMULATOR "swtpm" +#define TPM_DEFAULT_LOGLEVEL 5 +#define TPM_EMULATOR_PIDFILE "/tmp/qemu-tpm.pid"
swtpm will write this file and remove it when it terminates. You may run into concurrency problems as well. I would extend this name with the pid of the QEMU process starting swtpm.
Stefan
