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authorAlexander Graf <agraf@suse.de>2014-07-14 20:33:08 +0400
committerAlexander Graf <agraf@suse.de>2014-07-28 17:23:17 +0400
commit92b591a4c46b103ebd3fc0d03a084e1efd331253 (patch)
treec42fdfa42d3ed67eb530977768d6f614024815ec /virt
parent784aa3d7fb6f729c06d5836c9d9569f58e4d05ae (diff)
downloadlinux-92b591a4c46b103ebd3fc0d03a084e1efd331253.tar.xz
KVM: Allow KVM_CHECK_EXTENSION on the vm fd
The KVM_CHECK_EXTENSION is only available on the kvm fd today. Unfortunately on PPC some of the capabilities change depending on the way a VM was created. So instead we need a way to expose capabilities as VM ioctl, so that we can see which VM type we're using (HV or PR). To enable this, add the KVM_CHECK_EXTENSION ioctl to our vm ioctl portfolio. Signed-off-by: Alexander Graf <agraf@suse.de> Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/kvm_main.c58
1 files changed, 31 insertions, 27 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index e28f3caa539d..1b95cc926cfc 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2324,6 +2324,34 @@ static int kvm_ioctl_create_device(struct kvm *kvm,
return 0;
}
+static long kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg)
+{
+ switch (arg) {
+ case KVM_CAP_USER_MEMORY:
+ case KVM_CAP_DESTROY_MEMORY_REGION_WORKS:
+ case KVM_CAP_JOIN_MEMORY_REGIONS_WORKS:
+#ifdef CONFIG_KVM_APIC_ARCHITECTURE
+ case KVM_CAP_SET_BOOT_CPU_ID:
+#endif
+ case KVM_CAP_INTERNAL_ERROR_DATA:
+#ifdef CONFIG_HAVE_KVM_MSI
+ case KVM_CAP_SIGNAL_MSI:
+#endif
+#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
+ case KVM_CAP_IRQFD_RESAMPLE:
+#endif
+ case KVM_CAP_CHECK_EXTENSION_VM:
+ return 1;
+#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
+ case KVM_CAP_IRQ_ROUTING:
+ return KVM_MAX_IRQ_ROUTES;
+#endif
+ default:
+ break;
+ }
+ return kvm_vm_ioctl_check_extension(kvm, arg);
+}
+
static long kvm_vm_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg)
{
@@ -2487,6 +2515,9 @@ static long kvm_vm_ioctl(struct file *filp,
r = 0;
break;
}
+ case KVM_CHECK_EXTENSION:
+ r = kvm_vm_ioctl_check_extension_generic(kvm, arg);
+ break;
default:
r = kvm_arch_vm_ioctl(filp, ioctl, arg);
if (r == -ENOTTY)
@@ -2571,33 +2602,6 @@ static int kvm_dev_ioctl_create_vm(unsigned long type)
return r;
}
-static long kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg)
-{
- switch (arg) {
- case KVM_CAP_USER_MEMORY:
- case KVM_CAP_DESTROY_MEMORY_REGION_WORKS:
- case KVM_CAP_JOIN_MEMORY_REGIONS_WORKS:
-#ifdef CONFIG_KVM_APIC_ARCHITECTURE
- case KVM_CAP_SET_BOOT_CPU_ID:
-#endif
- case KVM_CAP_INTERNAL_ERROR_DATA:
-#ifdef CONFIG_HAVE_KVM_MSI
- case KVM_CAP_SIGNAL_MSI:
-#endif
-#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
- case KVM_CAP_IRQFD_RESAMPLE:
-#endif
- return 1;
-#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
- case KVM_CAP_IRQ_ROUTING:
- return KVM_MAX_IRQ_ROUTES;
-#endif
- default:
- break;
- }
- return kvm_vm_ioctl_check_extension(kvm, arg);
-}
-
static long kvm_dev_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg)
{