[Qemu-devel] [PATCH v13 1/6] tpm: add a "ppi" boolean property

["Marc-André Lureau" <marcandre.lureau@redhat.com>]

The following patches implement the TPM Physical Presence Interface,
make use of a new memory region and a fw_cfg entry. Enable PPI by
default with >=4.0 machine type, to avoid migration issues.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
---
 include/hw/compat.h | 11 ++++++++++-
 hw/tpm/tpm_crb.c    |  3 +++
 hw/tpm/tpm_tis.c    |  3 +++
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/include/hw/compat.h b/include/hw/compat.h
index 70958328fe..db368c5c74 100644
--- a/include/hw/compat.h
+++ b/include/hw/compat.h
@@ -2,7 +2,16 @@
 #define HW_COMPAT_H
 
 #define HW_COMPAT_3_1 \
-    /* empty */
+    { \
+        .driver   = "tpm-crb", \
+        .property = "ppi", \
+        .value    = "false", \
+    }, \
+    { \
+        .driver   = "tpm-tis", \
+        .property = "ppi", \
+        .value    = "false", \
+    },
 
 #define HW_COMPAT_3_0 \
     /* empty */
diff --git a/hw/tpm/tpm_crb.c b/hw/tpm/tpm_crb.c
index a92dd50437..d5b0ac5920 100644
--- a/hw/tpm/tpm_crb.c
+++ b/hw/tpm/tpm_crb.c
@@ -41,6 +41,8 @@ typedef struct CRBState {
     MemoryRegion cmdmem;
 
     size_t be_buffer_size;
+
+    bool ppi_enabled;
 } CRBState;
 
 #define CRB(obj) OBJECT_CHECK(CRBState, (obj), TYPE_TPM_CRB)
@@ -221,6 +223,7 @@ static const VMStateDescription vmstate_tpm_crb = {
 
 static Property tpm_crb_properties[] = {
     DEFINE_PROP_TPMBE("tpmdev", CRBState, tpmbe),
+    DEFINE_PROP_BOOL("ppi", CRBState, ppi_enabled, true),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/hw/tpm/tpm_tis.c b/hw/tpm/tpm_tis.c
index d9322692ee..cbb9a84a5b 100644
--- a/hw/tpm/tpm_tis.c
+++ b/hw/tpm/tpm_tis.c
@@ -81,6 +81,8 @@ typedef struct TPMState {
     TPMVersion be_tpm_version;
 
     size_t be_buffer_size;
+
+    bool ppi_enabled;
 } TPMState;
 
 #define TPM(obj) OBJECT_CHECK(TPMState, (obj), TYPE_TPM_TIS)
@@ -950,6 +952,7 @@ static const VMStateDescription vmstate_tpm_tis = {
 static Property tpm_tis_properties[] = {
     DEFINE_PROP_UINT32("irq", TPMState, irq_num, TPM_TIS_IRQ),
     DEFINE_PROP_TPMBE("tpmdev", TPMState, be_driver),
+    DEFINE_PROP_BOOL("ppi", TPMState, ppi_enabled, true),
     DEFINE_PROP_END_OF_LIST(),
 };
 
-- 
2.20.0