[SLOF] [PATCH v4 18/33] tpm: Add function to for getting version of TPM

[Stefan Berger]

Signed-off-by: Stefan Berger <stefanb at linux.vnet.ibm.com>
---
 board-qemu/slof/vtpm-sml.fs |  6 +++++-
 lib/libtpm/tcgbios.c        |  7 +++++++
 lib/libtpm/tcgbios.h        |  1 +
 lib/libtpm/tpm.code         | 10 ++++++++++
 lib/libtpm/tpm.in           |  1 +
 lib/libtpm/tpm_drivers.c    |  5 +++++
 lib/libtpm/tpm_drivers.h    |  5 +++++
 7 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/board-qemu/slof/vtpm-sml.fs b/board-qemu/slof/vtpm-sml.fs
index 3752700..25918b8 100644
--- a/board-qemu/slof/vtpm-sml.fs
+++ b/board-qemu/slof/vtpm-sml.fs
@@ -364,7 +364,11 @@ log-base LOG-SIZE tpm-set-log-parameters
 ;
 
 : vtpm-menu
-    vtpm12-menu
+    tpm-get-tpm-version CASE
+    1 OF
+        vtpm12-menu
+      ENDOF
+    ENDCASE
 ;
 
 : open  true ;
diff --git a/lib/libtpm/tcgbios.c b/lib/libtpm/tcgbios.c
index b7f86d4..7554bd3 100644
--- a/lib/libtpm/tcgbios.c
+++ b/lib/libtpm/tcgbios.c
@@ -60,6 +60,8 @@ static struct tpm_state tpm_state;
 
 typedef uint8_t tpm_ppi_op;
 
+#define TPM_version spapr_get_tpm_version()
+
 /********************************************************
   Extensions for TCG-enabled BIOS
  *******************************************************/
@@ -926,3 +928,8 @@ void tpm_driver_set_failure_reason(uint32_t errcode)
 
 	spapr_vtpm_set_error(errcode);
 }
+
+uint32_t tpm_get_tpm_version(void)
+{
+	return TPM_version;
+}
diff --git a/lib/libtpm/tcgbios.h b/lib/libtpm/tcgbios.h
index e37d075..398834a 100644
--- a/lib/libtpm/tcgbios.h
+++ b/lib/libtpm/tcgbios.h
@@ -39,6 +39,7 @@ uint32_t tpm_pass_through_to_tpm(unsigned char *buf, uint32_t cmdlen);
 uint32_t tpm_driver_get_state(void);
 uint32_t tpm_driver_get_failure_reason(void);
 void tpm_driver_set_failure_reason(uint32_t errcode);
+uint32_t tpm_get_tpm_version(void);
 
 /* flags returned by tpm_get_state */
 #define TPM_STATE_ENABLED        1
diff --git a/lib/libtpm/tpm.code b/lib/libtpm/tpm.code
index 235f368..c63b21c 100644
--- a/lib/libtpm/tpm.code
+++ b/lib/libtpm/tpm.code
@@ -213,3 +213,13 @@ PRIM(tpm_X2d_pass_X2d_through_X2d_to_X2d_tpm)
 	void *buf = TOS.a;
 	TOS.n = tpm_pass_through_to_tpm(buf, cmdsize);
 MIRP
+
+/*******************************************************************/
+/* Firmware API                                                    */
+/* SLOF:   tpm-get-tpm-version ( -- tpm-version )                  */
+/* LIBTPM: tpm_version = tpm_get_tpm_version()                     */
+/*******************************************************************/
+PRIM(tpm_X2d_get_X2d_tpm_X2d_version)
+	PUSH;
+	TOS.n = tpm_get_tpm_version();
+MIRP
diff --git a/lib/libtpm/tpm.in b/lib/libtpm/tpm.in
index 3c3b745..1261ac8 100644
--- a/lib/libtpm/tpm.in
+++ b/lib/libtpm/tpm.in
@@ -32,3 +32,4 @@ cod(tpm-pass-through-to-tpm)
 cod(tpm-driver-get-state)
 cod(tpm-driver-get-failure-reason)
 cod(tpm-driver-set-failure-reason)
+cod(tpm-get-tpm-version)
diff --git a/lib/libtpm/tpm_drivers.c b/lib/libtpm/tpm_drivers.c
index 4384f7f..78d0adc 100644
--- a/lib/libtpm/tpm_drivers.c
+++ b/lib/libtpm/tpm_drivers.c
@@ -469,6 +469,11 @@ void spapr_vtpm_set_error(vtpm_drv_error errcode)
 	spapr_vtpm.driver_error = errcode;
 }
 
+uint32_t spapr_get_tpm_version(void)
+{
+	return spapr_vtpm.tpm_version;
+}
+
 /**** higher layer interface ****/
 
 bool spapr_is_vtpm_present(void)
diff --git a/lib/libtpm/tpm_drivers.h b/lib/libtpm/tpm_drivers.h
index 38976d0..5b7f84d 100644
--- a/lib/libtpm/tpm_drivers.h
+++ b/lib/libtpm/tpm_drivers.h
@@ -73,6 +73,10 @@ typedef enum {
 /* the max. buffer size by the external TPM is 4k */
 #define PAPR_VTPM_MAX_BUFFER_SIZE       4096
 
+/* TPM version */
+#define TPM_VERSION_1_2  1
+#define TPM_VERSION_2    2
+
 /* exported functions */
 bool spapr_is_vtpm_present(void);
 void spapr_vtpm_finalize(void);
@@ -81,6 +85,7 @@ uint32_t spapr_vtpm_get_buffersize(void);
 vtpm_drv_state spapr_vtpm_get_state(void);
 vtpm_drv_error spapr_vtpm_get_error(void);
 void spapr_vtpm_set_error(vtpm_drv_error errcode);
+uint32_t spapr_get_tpm_version(void);
 
 struct tpm_req_header;
 int tpmhw_transmit(uint8_t locty, struct tpm_req_header *req,
-- 
2.17.1