X-Git-Url: https://repo.jachan.dev/qemu.git/blobdiff_plain/8437f7be3b1c49631e435c652707f2cee477149d..d51a2427f68a312b676edd0e9efce881649d1767:/kvm-all.c

diff --git a/kvm-all.c b/kvm-all.c
index 07ef62cb32..55025cc366 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -126,6 +126,7 @@ bool kvm_gsi_routing_allowed;
 bool kvm_gsi_direct_mapping;
 bool kvm_allowed;
 bool kvm_readonly_mem_allowed;
+bool kvm_vm_attributes_allowed;
 
 static const KVMCapabilityInfo kvm_required_capabilites[] = {
     KVM_CAP_INFO(USER_MEMORY),
@@ -1360,11 +1361,11 @@ int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, int virq)
            false);
 }
 
-static int kvm_irqchip_create(KVMState *s)
+static int kvm_irqchip_create(MachineState *machine, KVMState *s)
 {
     int ret;
 
-    if (!qemu_opt_get_bool(qemu_get_machine_opts(), "kernel_irqchip", true) ||
+    if (!machine_kernel_irqchip_allowed(machine) ||
         (!kvm_check_extension(s, KVM_CAP_IRQCHIP) &&
          (kvm_vm_enable_cap(s, KVM_CAP_S390_IRQCHIP, 0) < 0))) {
         return 0;
@@ -1598,12 +1599,15 @@ static int kvm_init(MachineState *ms)
     kvm_resamplefds_allowed =
         (kvm_check_extension(s, KVM_CAP_IRQFD_RESAMPLE) > 0);
 
-    ret = kvm_arch_init(s);
+    kvm_vm_attributes_allowed =
+        (kvm_check_extension(s, KVM_CAP_VM_ATTRIBUTES) > 0);
+
+    ret = kvm_arch_init(ms, s);
     if (ret < 0) {
         goto err;
     }
 
-    ret = kvm_irqchip_create(s);
+    ret = kvm_irqchip_create(ms, s);
     if (ret < 0) {
         goto err;
     }
@@ -1936,6 +1940,23 @@ int kvm_device_ioctl(int fd, int type, ...)
     return ret;
 }
 
+int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr)
+{
+    int ret;
+    struct kvm_device_attr attribute = {
+        .group = group,
+        .attr = attr,
+    };
+
+    if (!kvm_vm_attributes_allowed) {
+        return 0;
+    }
+
+    ret = kvm_vm_ioctl(s, KVM_HAS_DEVICE_ATTR, &attribute);
+    /* kvm returns 0 on success for HAS_DEVICE_ATTR */
+    return ret ? 0 : 1;
+}
+
 int kvm_has_sync_mmu(void)
 {
     return kvm_check_extension(kvm_state, KVM_CAP_SYNC_MMU);