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[Qemu-devel] [PATCH 3/4] Qemu-Xen-vTPM: Qemu vTPM xenstubdoms driver.
From: |
Quan Xu |
Subject: |
[Qemu-devel] [PATCH 3/4] Qemu-Xen-vTPM: Qemu vTPM xenstubdoms driver. |
Date: |
Sun, 2 Nov 2014 01:39:28 -0500 |
This driver provides vTPM initialization and sending data and TPM
commends to a Xen stubdom vTPM domain.
Signed-off-by: Quan Xu <address@hidden>
---
hw/tpm/Makefile.objs | 1 +
hw/tpm/tpm_xenstubdoms.c | 238 +++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 239 insertions(+)
create mode 100644 hw/tpm/tpm_xenstubdoms.c
diff --git a/hw/tpm/Makefile.objs b/hw/tpm/Makefile.objs
index 99f5983..39fc0f9 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
+common-obj-$(CONFIG_TPM_XENSTUBDOMS) += tpm_xenstubdoms.o
diff --git a/hw/tpm/tpm_xenstubdoms.c b/hw/tpm/tpm_xenstubdoms.c
new file mode 100644
index 0000000..845df18
--- /dev/null
+++ b/hw/tpm/tpm_xenstubdoms.c
@@ -0,0 +1,238 @@
+/*
+ * Xen Stubdom vTPM driver
+ *
+ * Copyright (c) 2014 Intel Corporation
+ * Authors:
+ * Quan Xu <address@hidden>
+ *
+ * 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 <dirent.h>
+#include "qemu-common.h"
+#include "qapi/error.h"
+#include "qemu/sockets.h"
+#include "qemu/log.h"
+#include "sysemu/tpm_backend.h"
+#include "tpm_int.h"
+#include "hw/hw.h"
+#include "hw/i386/pc.h"
+#include "hw/xen/xen_backend.h"
+#include "sysemu/tpm_backend_int.h"
+#include "tpm_tis.h"
+
+#ifdef DEBUG_TPM
+#define DPRINTF(fmt, ...) \
+ do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
+#else
+#define DPRINTF(fmt, ...) \
+ do { } while (0)
+#endif
+
+#define TYPE_TPM_XENSTUBDOMS "tpm-xenstubdoms"
+#define TPM_XENSTUBDOMS(obj) \
+ OBJECT_CHECK(TPMXenstubdomsState, (obj), TYPE_TPM_XENSTUBDOMS)
+
+static const TPMDriverOps tpm_xenstubdoms_driver;
+
+/* data structures */
+typedef struct TPMXenstubdomsThreadParams {
+ TPMState *tpm_state;
+ TPMRecvDataCB *recv_data_callback;
+ TPMBackend *tb;
+} TPMXenstubdomsThreadParams;
+
+struct TPMXenstubdomsState {
+ TPMBackend parent;
+ TPMBackendThread tbt;
+ TPMXenstubdomsThreadParams tpm_thread_params;
+ bool had_startup_error;
+};
+
+typedef struct TPMXenstubdomsState TPMXenstubdomsState;
+
+/* functions */
+
+static void tpm_xenstubdoms_cancel_cmd(TPMBackend *tb);
+
+static int tpm_xenstubdoms_unix_transfer(const TPMLocality *locty_data)
+{
+ size_t rlen;
+ xen_vtpm_send(locty_data->w_buffer.buffer, locty_data->w_offset);
+ xen_vtpm_recv(locty_data->r_buffer.buffer, &rlen);
+ return 0;
+}
+
+static void tpm_xenstubdoms_worker_thread(gpointer data,
+ gpointer user_data)
+{
+ TPMXenstubdomsThreadParams *thr_parms = user_data;
+ TPMBackendCmd cmd = (TPMBackendCmd)data;
+
+ switch (cmd) {
+ case TPM_BACKEND_CMD_PROCESS_CMD:
+ /* here need a the cmd process function */
+ tpm_xenstubdoms_unix_transfer(thr_parms->tpm_state->locty_data);
+ thr_parms->recv_data_callback(thr_parms->tpm_state,
+ thr_parms->tpm_state->locty_number);
+ break;
+ case TPM_BACKEND_CMD_INIT:
+ case TPM_BACKEND_CMD_END:
+ case TPM_BACKEND_CMD_TPM_RESET:
+ /* nothing to do */
+ break;
+ }
+}
+
+/*
+ * * Start the TPM (thread). If it had been started before, then terminate
+ * * and start it again.
+ * */
+static int tpm_xenstubdoms_startup_tpm(TPMBackend *tb)
+{
+ TPMXenstubdomsState *tpm_xs = TPM_XENSTUBDOMS(tb);
+
+ tpm_backend_thread_tpm_reset(&tpm_xs->tbt, tpm_xenstubdoms_worker_thread,
+ &tpm_xs->tpm_thread_params);
+
+ return 0;
+}
+
+static void tpm_xenstubdoms_reset(TPMBackend *tb)
+{
+ TPMXenstubdomsState *tpm_xs = TPM_XENSTUBDOMS(tb);
+
+ tpm_backend_thread_end(&tpm_xs->tbt);
+ tpm_xs->had_startup_error = false;
+}
+
+static int tpm_xenstubdoms_init(TPMBackend *tb, TPMState *s,
+ TPMRecvDataCB *recv_data_cb)
+{
+ TPMXenstubdomsState *tpm_xs = TPM_XENSTUBDOMS(tb);
+
+ tpm_xs->tpm_thread_params.tpm_state = s;
+ tpm_xs->tpm_thread_params.recv_data_callback = recv_data_cb;
+ tpm_xs->tpm_thread_params.tb = tb;
+ return 0;
+}
+
+static bool tpm_xenstubdoms_get_tpm_established_flag(TPMBackend *tb)
+{
+ return false;
+}
+
+static bool tpm_xenstubdoms_get_startup_error(TPMBackend *tb)
+{
+ TPMXenstubdomsState *tpm_xs = TPM_XENSTUBDOMS(tb);
+
+ return tpm_xs->had_startup_error;
+}
+
+static size_t tpm_xenstubdoms_realloc_buffer(TPMSizedBuffer *sb)
+{
+ size_t wanted_size = 4096; /* Linux tpm.c buffer size */
+
+ if (sb->size != wanted_size) {
+ sb->buffer = g_realloc(sb->buffer, wanted_size);
+ sb->size = wanted_size;
+ }
+ return sb->size;
+}
+
+static void tpm_xenstubdoms_deliver_request(TPMBackend *tb)
+{
+ TPMXenstubdomsState *tpm_xs = TPM_XENSTUBDOMS(tb);
+ tpm_backend_thread_deliver_request(&tpm_xs->tbt);
+}
+
+static void tpm_xenstubdoms_cancel_cmd(TPMBackend *tb)
+{
+}
+
+static const char *tpm_xenstubdoms_create_desc(void)
+{
+ return "Xenstubdoms TPM backend driver";
+}
+
+static TPMBackend *tpm_xenstubdoms_create(QemuOpts *opts, const char *id)
+{
+ Object *obj = object_new(TYPE_TPM_XENSTUBDOMS);
+ TPMBackend *tb = TPM_BACKEND(obj);
+
+ tb->id = g_strdup(id);
+ tb->fe_model = -1;
+ tb->ops = &tpm_xenstubdoms_driver;
+ return tb;
+}
+
+static void tpm_xenstubdoms_destroy(TPMBackend *tb)
+{
+ TPMXenstubdomsState *tpm_xh = TPM_XENSTUBDOMS(tb);
+ tpm_backend_thread_end(&tpm_xh->tbt);
+
+ g_free(tb->id);
+}
+
+static const QemuOptDesc tpm_xenstubdoms_cmdline_opts[] = {
+ TPM_STANDARD_CMDLINE_OPTS,
+ {},
+};
+
+static const TPMDriverOps tpm_xenstubdoms_driver = {
+ .type = TPM_TYPE_XENSTUBDOMS,
+ .opts = tpm_xenstubdoms_cmdline_opts,
+ .desc = tpm_xenstubdoms_create_desc,
+ .create = tpm_xenstubdoms_create,
+ .destroy = tpm_xenstubdoms_destroy,
+ .init = tpm_xenstubdoms_init,
+ .startup_tpm = tpm_xenstubdoms_startup_tpm,
+ .realloc_buffer = tpm_xenstubdoms_realloc_buffer,
+ .reset = tpm_xenstubdoms_reset,
+ .had_startup_error = tpm_xenstubdoms_get_startup_error,
+ .deliver_request = tpm_xenstubdoms_deliver_request,
+ .cancel_cmd = tpm_xenstubdoms_cancel_cmd,
+ .get_tpm_established_flag = tpm_xenstubdoms_get_tpm_established_flag,
+};
+
+static void tpm_xenstubdoms_inst_init(Object *obj)
+{
+}
+
+static void tpm_xenstubdoms_inst_finalize(Object *obj)
+{
+}
+
+static void tpm_xenstubdoms_class_init(ObjectClass *klass, void *data)
+{
+ TPMBackendClass *tbc = TPM_BACKEND_CLASS(klass);
+ tbc->ops = &tpm_xenstubdoms_driver;
+}
+
+static const TypeInfo tpm_xenstubdoms_info = {
+ .name = TYPE_TPM_XENSTUBDOMS,
+ .parent = TYPE_TPM_BACKEND,
+ .instance_size = sizeof(TPMXenstubdomsState),
+ .class_init = tpm_xenstubdoms_class_init,
+ .instance_init = tpm_xenstubdoms_inst_init,
+ .instance_finalize = tpm_xenstubdoms_inst_finalize,
+};
+
+static void tpm_xenstubdoms_register(void)
+{
+ type_register_static(&tpm_xenstubdoms_info);
+ tpm_register_driver(&tpm_xenstubdoms_driver);
+}
+
+type_init(tpm_xenstubdoms_register)
--
1.8.3.2
- [Qemu-devel] [PATCH 3/4] Qemu-Xen-vTPM: Qemu vTPM xenstubdoms driver.,
Quan Xu <=