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authorDominik Dingel <dingel@linux.vnet.ibm.com>2015-03-12 13:53:49 +0100
committerCornelia Huck <cornelia.huck@de.ibm.com>2015-03-16 10:15:45 +0100
commitd0a073a186e4a81ae81435bd5b7286b657a69bfd (patch)
treeb43151d8f1f0ea52bdcc2ff82620a336e485a5ae /kvm-all.c
parent7d45285fc9f75e0a85533ada8fd3aeda48d5d71a (diff)
downloadqemu-arm-d0a073a186e4a81ae81435bd5b7286b657a69bfd.tar.gz
kvm: encapsulate HAS_DEVICE for vm attrs
More and more virtual machine specifics between kvm and qemu will be transferred with vm attributes. So we encapsulate the common logic in a generic function. Additionally we need only to check during initialization if kvm supports virtual machine attributes. Cc: Paolo Bonzini <pbonzini@redhat.com> Suggested-by: Thomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com> Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Message-Id: <1426164834-38648-2-git-send-email-jfrei@linux.vnet.ibm.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'kvm-all.c')
-rw-r--r--kvm-all.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/kvm-all.c b/kvm-all.c
index cbedc2564e..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),
@@ -1598,6 +1599,9 @@ static int kvm_init(MachineState *ms)
kvm_resamplefds_allowed =
(kvm_check_extension(s, KVM_CAP_IRQFD_RESAMPLE) > 0);
+ kvm_vm_attributes_allowed =
+ (kvm_check_extension(s, KVM_CAP_VM_ATTRIBUTES) > 0);
+
ret = kvm_arch_init(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);