[libvirt] [PATCH 20/22] qemu_capabilities: Introduce virQEMUCapsGetCPUFeatures
The function creates a lost of all (or migratable only) CPU features
supported by QEMU. It works by looking at the CPU model info returned by
query-cpu-model-expansion QMP command.
Signed-off-by: Jiri Denemark <jdenemar(a)redhat.com>
---
src/qemu/qemu_capabilities.c | 52 ++++++++++++++++++++++++++++++++++++
src/qemu/qemu_capabilities.h | 4 +++
2 files changed, 56 insertions(+)
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 77a4b4154e..e8c5940210 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -2367,6 +2367,58 @@ virQEMUCapsProbeQMPHostCPU(virQEMUCapsPtr qemuCaps,
return ret;
}
+
+/**
+ * Get NULL terminated list of features supported by QEMU.
+ *
+ * Returns -1 on error,
+ * 0 on success (@features will be NULL if QEMU does not support this),
+ * 1 when @features is filled in, but migratability info is not available.
+ */
+int
+virQEMUCapsGetCPUFeatures(virQEMUCapsPtr qemuCaps,
+ virDomainVirtType virtType,
+ bool migratable,
+ char ***features)
+{
+ virQEMUCapsHostCPUDataPtr data;
+ char **list;
+ size_t i;
+ size_t n;
+ int ret = -1;
+
+ *features = NULL;
+ data = virQEMUCapsGetHostCPUData(qemuCaps, virtType);
+
+ if (!data->info)
+ return 0;
+
+ if (VIR_ALLOC_N(list, data->info->nprops + 1) < 0)
+ return -1;
+
+ n = 0;
+ for (i = 0; i < data->info->nprops; i++) {
+ qemuMonitorCPUPropertyPtr prop = data->info->props + i;
+
+ if (migratable && prop->migratable == VIR_TRISTATE_BOOL_NO)
+ continue;
+
+ if (VIR_STRDUP(list[n++], prop->name) < 0)
+ goto cleanup;
+ }
+
+ VIR_STEAL_PTR(*features, list);
+ if (migratable && !data->info->migratability)
+ ret = 1;
+ else
+ ret = 0;
+
+ cleanup:
+ virStringListFree(list);
+ return ret;
+}
+
+
struct tpmTypeToCaps {
int type;
virQEMUCapsFlags caps;
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index 6f095bfbfe..eee989559e 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -529,6 +529,10 @@ typedef enum {
virCPUDefPtr virQEMUCapsGetHostModel(virQEMUCapsPtr qemuCaps,
virDomainVirtType type,
virQEMUCapsHostCPUType cpuType);
+int virQEMUCapsGetCPUFeatures(virQEMUCapsPtr qemuCaps,
+ virDomainVirtType virtType,
+ bool migratable,
+ char ***features);
bool virQEMUCapsIsCPUModeSupported(virQEMUCapsPtr qemuCaps,
virCapsPtr caps,
--
2.17.0