Extend TPM TIS interface to support TPM 2

Following the recent upgrade to version 1.3, extend the TPM TIS
interface with capabilities introduced for support of a TPM 2.

TPM TIS for TPM 2 introduced the following extensions beyond the
TPM TIS 1.3 (used for TPM 1.2):

- A new 32bit interface Id register was introduced.
- New flags for the status (STS) register were defined.
- New flags for the capability flags were defined.

Support the above if a TPM TIS 1.3 for TPM 2 is used with a TPM 2
on the backend side. Support the old TPM TIS 1.3 configuration if a
TPM 1.2 is being used. A subsequent patch will then determine which
TPM version is being used in the backend.

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

2 files changed, 29 insertions, 0 deletions

diff --git a/include/sysemu/tpm.h b/include/sysemu/tpm.h
index 9b81ce9189..848df412db 100644
--- a/include/sysemu/tpm.h
+++ b/include/sysemu/tpm.h
@@ -20,6 +20,12 @@ int tpm_config_parse(QemuOptsList *opts_list, const char *optarg);
 int tpm_init(void);
 void tpm_cleanup(void);
 
+typedef enum  TPMVersion {
+    TPM_VERSION_UNSPEC = 0,
+    TPM_VERSION_1_2 = 1,
+    TPM_VERSION_2_0 = 2,
+} TPMVersion;
+
 #define TYPE_TPM_TIS                "tpm-tis"
 
 static inline bool tpm_find(void)
diff --git a/include/sysemu/tpm_backend.h b/include/sysemu/tpm_backend.h
index 540ee25477..0a366be0f2 100644
--- a/include/sysemu/tpm_backend.h
+++ b/include/sysemu/tpm_backend.h
@@ -88,6 +88,10 @@ struct TPMDriverOps {
     void (*cancel_cmd)(TPMBackend *t);
 
     bool (*get_tpm_established_flag)(TPMBackend *t);
+
+    int (*reset_tpm_established_flag)(TPMBackend *t, uint8_t locty);
+
+    TPMVersion (*get_tpm_version)(TPMBackend *t);
 };
 
 
@@ -192,6 +196,15 @@ void tpm_backend_cancel_cmd(TPMBackend *s);
 bool tpm_backend_get_tpm_established_flag(TPMBackend *s);
 
 /**
+ * tpm_backend_reset_tpm_established_flag:
+ * @s: the backend
+ * @locty: the locality number
+ *
+ * Reset the TPM establishment flag.
+ */
+int tpm_backend_reset_tpm_established_flag(TPMBackend *s, uint8_t locty);
+
+/**
  * tpm_backend_open:
  * @s: the backend to open
  * @errp: a pointer to return the #Error object if an error occurs.
@@ -201,6 +214,16 @@ bool tpm_backend_get_tpm_established_flag(TPMBackend *s);
  */
 void tpm_backend_open(TPMBackend *s, Error **errp);
 
+/**
+ * tpm_backend_get_tpm_version:
+ * @s: the backend to call into
+ *
+ * Get the TPM Version that is emulated at the backend.
+ *
+ * Returns TPMVersion.
+ */
+TPMVersion tpm_backend_get_tpm_version(TPMBackend *s);
+
 TPMBackend *qemu_find_tpm(const char *id);
 
 const TPMDriverOps *tpm_get_backend_driver(const char *type);