[libvirt PATCH v4 05/19] qemu: Query hvf capability on macOS

[Andrea Bolognani <abologna@xxxxxxxxxx>]

From: Roman Bolshakov <r.bolshakov@xxxxxxxxx>

There's no QMP command for querying if hvf is supported, therefore we
use sysctl interface that tells if Hypervisor.framework works/available
on the host.

Signed-off-by: Roman Bolshakov <r.bolshakov@xxxxxxxxx>
Signed-off-by: Andrea Bolognani <abologna@xxxxxxxxxx>
Reviewed-by: Daniel P. Berrangé <berrange@xxxxxxxxxx>
---
 src/qemu/qemu_capabilities.c | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 6b7e295f68..56325d1762 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -56,6 +56,10 @@
 #include <unistd.h>
 #include <stdarg.h>
 #include <sys/utsname.h>
+#ifdef __APPLE__
+# include <sys/types.h>
+# include <sys/sysctl.h>
+#endif
 
 #define VIR_FROM_THIS VIR_FROM_QEMU
 
@@ -3195,6 +3199,33 @@ virQEMUCapsProbeQMPKVMState(virQEMUCaps *qemuCaps,
     return 0;
 }
 
+#ifdef __APPLE__
+static int
+virQEMUCapsProbeHVF(virQEMUCaps *qemuCaps)
+{
+    int hv_support;
+    size_t len = sizeof(hv_support);
+
+    if (sysctlbyname("kern.hv_support", &hv_support, &len, NULL, 0) < 0)
+        hv_support = 0;
+
+    if (qemuCaps->version >= 2012000 &&
+        (qemuCaps->arch == VIR_ARCH_X86_64 ||
+         qemuCaps->arch == VIR_ARCH_AARCH64) &&
+        hv_support) {
+        virQEMUCapsSet(qemuCaps, QEMU_CAPS_HVF);
+    }
+
+    return 0;
+}
+#else
+static int
+virQEMUCapsProbeHVF(virQEMUCaps *qemuCaps G_GNUC_UNUSED)
+{
+  return 0;
+}
+#endif
+
 struct virQEMUCapsCommandLineProps {
     const char *option;
     const char *param;
@@ -5344,6 +5375,9 @@ virQEMUCapsInitQMPMonitor(virQEMUCaps *qemuCaps,
     if (virQEMUCapsProbeQMPKVMState(qemuCaps, mon) < 0)
         return -1;
 
+    if (virQEMUCapsProbeHVF(qemuCaps) < 0)
+        return -1;
+
     type = virQEMUCapsGetVirtType(qemuCaps);
     accel = virQEMUCapsGetAccel(qemuCaps, type);
 
-- 
2.31.1