Merge remote-tracking branch 'remotes/stefanberger/tags/pull-tpm-2017-12-15-1' into staging

Merge tpm 2017/12/15 v1

# gpg: Signature made Fri 15 Dec 2017 04:44:15 GMT
# gpg:                using RSA key 0x75AD65802A0B4211
# gpg: Good signature from "Stefan Berger <stefanb@linux.vnet.ibm.com>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: B818 B9CA DF90 89C2 D5CE  C66B 75AD 6580 2A0B 4211

* remotes/stefanberger/tags/pull-tpm-2017-12-15-1: (32 commits)
  tpm: tpm_passthrough: Fail startup if FE buffer size < BE buffer size
  tpm: tpm_emulator: get and set buffer size of device
  tpm: tpm_passthrough: Read the buffer size from the host device
  tpm: pull tpm_util_request() out of tpm_util_test()
  tpm: Move getting TPM buffer size to backends
  tpm: remove tpm_register_model()
  tpm-tis: use DEFINE_PROP_TPMBE
  qdev: add DEFINE_PROP_TPMBE
  tpm-tis: check that at most one TPM device exists
  tpm-tis: remove redundant 'tpm_tis:' in error messages
  tpm-emulator: add a FIXME comment about blocking cancel
  acpi: change TPM TIS data conditions
  tpm: add tpm_cmd_get_size() to tpm_util
  tpm: add TPM interface to lookup TPM version
  tpm: lookup the the TPM interface instead of TIS device
  tpm: rename qemu_find_tpm() -> qemu_find_tpm_be()
  tpm-tis: simplify header inclusion
  tpm-passthrough: workaround a possible race
  tpm-passthrough: simplify create()
  tpm-passthrough: make it safer to destroy after creation
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 64 insertions, 0 deletions

diff --git a/hw/core/qdev-properties-system.c b/hw/core/qdev-properties-system.c
index ec10da7424..c17364655c 100644
--- a/hw/core/qdev-properties-system.c
+++ b/hw/core/qdev-properties-system.c
@@ -21,6 +21,7 @@
 #include "net/hub.h"
 #include "qapi/visitor.h"
 #include "chardev/char-fe.h"
+#include "sysemu/tpm_backend.h"
 #include "sysemu/iothread.h"
 
 static void get_pointer(Object *obj, Visitor *v, Property *prop,
@@ -236,6 +237,69 @@ const PropertyInfo qdev_prop_chr = {
     .release = release_chr,
 };
 
+/* --- character device --- */
+
+static void get_tpm(Object *obj, Visitor *v, const char *name, void *opaque,
+                    Error **errp)
+{
+    DeviceState *dev = DEVICE(obj);
+    TPMBackend **be = qdev_get_prop_ptr(dev, opaque);
+    char *p;
+
+    p = g_strdup(*be ? (*be)->id : "");
+    visit_type_str(v, name, &p, errp);
+    g_free(p);
+}
+
+static void set_tpm(Object *obj, Visitor *v, const char *name, void *opaque,
+                    Error **errp)
+{
+    DeviceState *dev = DEVICE(obj);
+    Error *local_err = NULL;
+    Property *prop = opaque;
+    TPMBackend *s, **be = qdev_get_prop_ptr(dev, prop);
+    char *str;
+
+    if (dev->realized) {
+        qdev_prop_set_after_realize(dev, name, errp);
+        return;
+    }
+
+    visit_type_str(v, name, &str, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return;
+    }
+
+    s = qemu_find_tpm_be(str);
+    if (s == NULL) {
+        error_setg(errp, "Property '%s.%s' can't find value '%s'",
+                   object_get_typename(obj), prop->name, str);
+    } else if (tpm_backend_init(s, TPM_IF(obj), errp) == 0) {
+        *be = s; /* weak reference, avoid cyclic ref */
+    }
+    g_free(str);
+}
+
+static void release_tpm(Object *obj, const char *name, void *opaque)
+{
+    DeviceState *dev = DEVICE(obj);
+    Property *prop = opaque;
+    TPMBackend **be = qdev_get_prop_ptr(dev, prop);
+
+    if (*be) {
+        tpm_backend_reset(*be);
+    }
+}
+
+const PropertyInfo qdev_prop_tpm = {
+    .name  = "str",
+    .description = "ID of a tpm to use as a backend",
+    .get   = get_tpm,
+    .set   = set_tpm,
+    .release = release_tpm,
+};
+
 /* --- netdev device --- */
 static void get_netdev(Object *obj, Visitor *v, const char *name,
                        void *opaque, Error **errp)