[Qemu-devel] [PATCH v14 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>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 hw/core/machine.c | 8 ++++++++
 hw/tpm/tpm_crb.c  | 3 +++
 hw/tpm/tpm_tis.c  | 3 +++
 3 files changed, 14 insertions(+)

diff --git a/hw/core/machine.c b/hw/core/machine.c
index f8563efb86..92519637cb 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -40,6 +40,14 @@ GlobalProperty hw_compat_3_1[] = {
         .driver   = "memory-backend-memfd",
         .property = "x-use-canonical-path-for-ramblock-id",
         .value    = "true",
+    },{
+        .driver   = "tpm-crb",
+        .property = "ppi",
+        .value    = "false",
+    },{
+        .driver   = "tpm-tis",
+        .property = "ppi",
+        .value    = "false",
     },
 };
 const size_t hw_compat_3_1_len = G_N_ELEMENTS(hw_compat_3_1);
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 2563d7501f..1698d83cd3 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)
@@ -954,6 +956,7 @@ 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(),
 };
 
-- 
2.20.1.2.gb21ebb671b