From: Cédric Le Goater <c...@redhat.com>
Support for protected VMs should have been enabled on the host with
the kernel parameter 'prot_virt=1'. If the hardware supports the
feature, it is reflected under sysfs.
Signed-off-by: Cédric Le Goater <c...@redhat.com>
---
hw/s390x/pv.c | 23 ++++++++++++++++++++++-
1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/hw/s390x/pv.c b/hw/s390x/pv.c
index 3a7ec70634..8d0d3f4adc 100644
--- a/hw/s390x/pv.c
+++ b/hw/s390x/pv.c
@@ -14,6 +14,7 @@
#include <linux/kvm.h>
#include "qapi/error.h"
+#include "qemu/cutils.h"
#include "qemu/error-report.h"
#include "sysemu/kvm.h"
#include "qom/object_interfaces.h"
@@ -281,9 +282,29 @@ static bool s390_pv_check_cpus(Error **errp)
return true;
}
+#define S390_PV_HOST "/sys/firmware/uv/prot_virt_host"
+
+static bool s390_pv_check_host(Error **errp)
+{
+ gchar *s = NULL;
+ uint64_t pv_host = 0;
+
+ if (g_file_get_contents(S390_PV_HOST, &s, NULL, NULL)) {
+ pv_host = g_ascii_strtoull(s, NULL, 10);
+ }
+ g_free(s);
+
+ if (pv_host != 1) {
+ error_setg(errp, "Host does not support protected VMs");
+ return false;
+ }
+
+ return true;
+}
+
static bool s390_pv_guest_check(const Object *obj, Error **errp)
{
- return s390_pv_check_cpus(errp);
+ return s390_pv_check_cpus(errp) && s390_pv_check_host(errp);
}
OBJECT_DEFINE_TYPE_WITH_INTERFACES(S390PVGuest,
--
2.38.1
