[PATCH 10/41] testutilsqemu: Helpers for changing host CPU and arch

[Jiri Denemark <jdenemar@xxxxxxxxxx>]

Changing a host architecture or a CPU is not as easy as assigning a new
value to the appropriate element in virCaps since there is a relation
between the CPU and host architecture (we don't really want to test
anything on an AArch64 host with core2duo CPU). This patch introduces
qemuTestSetHostArch and qemuTestSetHostCPU helpers which will make sure
the host architecture matches the host CPU.

Signed-off-by: Jiri Denemark <jdenemar@xxxxxxxxxx>
---
 tests/testutilsqemu.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++-----
 tests/testutilsqemu.h |  8 ++++++--
 2 files changed, 52 insertions(+), 7 deletions(-)

diff --git a/tests/testutilsqemu.c b/tests/testutilsqemu.c
index 11dd20e..9b66101 100644
--- a/tests/testutilsqemu.c
+++ b/tests/testutilsqemu.c
@@ -16,6 +16,7 @@
 
 virCPUDefPtr cpuDefault;
 virCPUDefPtr cpuHaswell;
+virCPUDefPtr cpuPower8;
 
 static virCPUFeatureDef cpuDefaultFeatures[] = {
     { (char *) "lahf_lm",   -1 },
@@ -92,6 +93,15 @@ static virCPUDef cpuHaswellData = {
     cpuHaswellFeatures,     /* features */
 };
 
+static virCPUDef cpuPower8Data = {
+    .type = VIR_CPU_TYPE_HOST,
+    .arch = VIR_ARCH_PPC64,
+    .model = (char *) "POWER8",
+    .sockets = 1,
+    .cores = 8,
+    .threads = 8,
+};
+
 static virCapsGuestMachinePtr *testQemuAllocMachines(int *nmachines)
 {
     virCapsGuestMachinePtr *machines;
@@ -331,7 +341,8 @@ virCapsPtr testQemuCapsInit(void)
         goto cleanup;
 
     if (!(cpuDefault = virCPUDefCopy(&cpuDefaultData)) ||
-        !(cpuHaswell = virCPUDefCopy(&cpuHaswellData)))
+        !(cpuHaswell = virCPUDefCopy(&cpuHaswellData)) ||
+        !(cpuPower8 = virCPUDefCopy(&cpuPower8Data)))
         goto cleanup;
 
     caps->host.cpu = cpuDefault;
@@ -440,15 +451,45 @@ virCapsPtr testQemuCapsInit(void)
 
  cleanup:
     virCapabilitiesFreeMachines(machines, nmachines);
-    if (caps->host.cpu != cpuDefault)
-        virCPUDefFree(cpuDefault);
-    if (caps->host.cpu != cpuHaswell)
-        virCPUDefFree(cpuHaswell);
+    caps->host.cpu = NULL;
+    virCPUDefFree(cpuDefault);
+    virCPUDefFree(cpuHaswell);
+    virCPUDefFree(cpuPower8);
     virObjectUnref(caps);
     return NULL;
 }
 
 
+void
+qemuTestSetHostArch(virCapsPtr caps,
+                    virArch arch)
+{
+    if (arch == VIR_ARCH_NONE)
+        arch = VIR_ARCH_X86_64;
+    caps->host.arch = arch;
+    qemuTestSetHostCPU(caps, NULL);
+}
+
+
+void
+qemuTestSetHostCPU(virCapsPtr caps,
+                   virCPUDefPtr cpu)
+{
+    virArch arch = caps->host.arch;
+
+    if (!cpu) {
+        if (ARCH_IS_X86(arch))
+            cpu = cpuDefault;
+        else if (ARCH_IS_PPC64(arch))
+            cpu = cpuPower8;
+    }
+
+    if (cpu)
+        caps->host.arch = cpu->arch;
+    caps->host.cpu = cpu;
+}
+
+
 virQEMUCapsPtr
 qemuTestParseCapabilities(const char *capsFile)
 {
diff --git a/tests/testutilsqemu.h b/tests/testutilsqemu.h
index f2b71e9..6d35116f 100644
--- a/tests/testutilsqemu.h
+++ b/tests/testutilsqemu.h
@@ -19,8 +19,12 @@ virQEMUCapsPtr qemuTestParseCapabilities(const char *capsFile);
 
 extern virCPUDefPtr cpuDefault;
 extern virCPUDefPtr cpuHaswell;
-void testQemuCapsSetCPU(virCapsPtr caps,
-                        virCPUDefPtr hostCPU);
+extern virCPUDefPtr cpuPower8;
+
+void qemuTestSetHostArch(virCapsPtr caps,
+                        virArch arch);
+void qemuTestSetHostCPU(virCapsPtr caps,
+                        virCPUDefPtr cpu);
 
 int qemuTestDriverInit(virQEMUDriver *driver);
 void qemuTestDriverFree(virQEMUDriver *driver);
-- 
2.9.2

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