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, 36 insertions, 12 deletions

diff --git a/include/sysemu/tpm.h b/include/sysemu/tpm.h
index d7a2bd8556..852e02687c 100644
--- a/include/sysemu/tpm.h
+++ b/include/sysemu/tpm.h
@@ -12,35 +12,59 @@
 #ifndef QEMU_TPM_H
 #define QEMU_TPM_H
 
-#include "qemu/option.h"
 #include "qom/object.h"
-
-typedef struct TPMState TPMState;
+#include "qapi-types.h"
 
 int tpm_config_parse(QemuOptsList *opts_list, const char *optarg);
 int tpm_init(void);
 void tpm_cleanup(void);
 
-typedef enum  TPMVersion {
+typedef enum TPMVersion {
     TPM_VERSION_UNSPEC = 0,
     TPM_VERSION_1_2 = 1,
     TPM_VERSION_2_0 = 2,
 } TPMVersion;
 
-TPMVersion tpm_tis_get_tpm_version(Object *obj);
+#define TYPE_TPM_IF "tpm-if"
+#define TPM_IF_CLASS(klass)                                 \
+    OBJECT_CLASS_CHECK(TPMIfClass, (klass), TYPE_TPM_IF)
+#define TPM_IF_GET_CLASS(obj)                           \
+    OBJECT_GET_CLASS(TPMIfClass, (obj), TYPE_TPM_IF)
+#define TPM_IF(obj)                             \
+    INTERFACE_CHECK(TPMIf, (obj), TYPE_TPM_IF)
+
+typedef struct TPMIf {
+    Object parent_obj;
+} TPMIf;
+
+typedef struct TPMIfClass {
+    InterfaceClass parent_class;
+
+    enum TpmModel model;
+    void (*request_completed)(TPMIf *obj);
+    enum TPMVersion (*get_version)(TPMIf *obj);
+} TPMIfClass;
 
 #define TYPE_TPM_TIS                "tpm-tis"
 
-static inline TPMVersion tpm_get_version(void)
+#define TPM_IS_TIS(chr)                             \
+    object_dynamic_cast(OBJECT(chr), TYPE_TPM_TIS)
+
+/* returns NULL unless there is exactly one TPM device */
+static inline TPMIf *tpm_find(void)
 {
-#ifdef CONFIG_TPM
-    Object *obj = object_resolve_path_type("", TYPE_TPM_TIS, NULL);
+    Object *obj = object_resolve_path_type("", TYPE_TPM_IF, NULL);
 
-    if (obj) {
-        return tpm_tis_get_tpm_version(obj);
+    return TPM_IF(obj);
+}
+
+static inline TPMVersion tpm_get_version(TPMIf *ti)
+{
+    if (!ti) {
+        return TPM_VERSION_UNSPEC;
     }
-#endif
-    return TPM_VERSION_UNSPEC;
+
+    return TPM_IF_GET_CLASS(ti)->get_version(ti);
 }
 
 #endif /* QEMU_TPM_H */