[PATCH] conf: Set SPAPR TPM default to 2.0 and prevent 1.2 choice

[Stefan Berger <stefanb@xxxxxxxxxxxxxxxxxx>]

From: Stefan Berger <stefanb@xxxxxxxxxxxxx>

The firmware (SLOF) on QEMU for ppc64 does not support TPM 1.2, so
prevent the choice of TPM 1.2 when the SPAPR device model is chosen
and use a default of '2.0' (TPM 2) for the backend.

Signed-off-by: Stefan Berger <stefanb@xxxxxxxxxxxxx>
---
 src/qemu/qemu_validate.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/qemu/qemu_validate.c b/src/qemu/qemu_validate.c
index bd7590a00a..f4d71aebf5 100644
--- a/src/qemu/qemu_validate.c
+++ b/src/qemu/qemu_validate.c
@@ -3645,8 +3645,12 @@ qemuValidateDomainDeviceDefTPM(virDomainTPMDef *tpm,
     virQEMUCapsFlags flag;
 
     /* TPM 1.2 and 2 are not compatible, so we choose a specific version here */
-    if (tpm->version == VIR_DOMAIN_TPM_VERSION_DEFAULT)
-        tpm->version = VIR_DOMAIN_TPM_VERSION_1_2;
+    if (tpm->version == VIR_DOMAIN_TPM_VERSION_DEFAULT) {
+        if (tpm->model == VIR_DOMAIN_TPM_MODEL_SPAPR)
+            tpm->version = VIR_DOMAIN_TPM_VERSION_2_0;
+        else
+            tpm->version = VIR_DOMAIN_TPM_VERSION_1_2;
+    }
 
     switch (tpm->version) {
     case VIR_DOMAIN_TPM_VERSION_1_2:
@@ -3658,6 +3662,12 @@ qemuValidateDomainDeviceDefTPM(virDomainTPMDef *tpm,
                            virDomainTPMModelTypeToString(tpm->model));
             return -1;
         }
+        /* TPM 1.2 + SPAPR do not work with any 'type' (backend) */
+        if (tpm->model == VIR_DOMAIN_TPM_MODEL_SPAPR) {
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                           _("TPM 1.2 is not supported with the SPAPR device model"));
+            return -1;
+        }
         break;
     case VIR_DOMAIN_TPM_VERSION_2_0:
     case VIR_DOMAIN_TPM_VERSION_DEFAULT:
-- 
2.17.1