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authorAlexander Graf <agraf@suse.de>2009-09-15 11:37:46 +0200
committerAvi Kivity <avi@redhat.com>2009-12-03 09:32:10 +0200
commit10474ae8945ce08622fd1f3464e55bd817bf2376 (patch)
treed390843b5107e600fbbf745eb24d85d745fe449f /arch/powerpc/kvm
parente8b3433a5c062e94e34cadb6144c10689a497bc3 (diff)
KVM: Activate Virtualization On Demand
X86 CPUs need to have some magic happening to enable the virtualization extensions on them. This magic can result in unpleasant results for users, like blocking other VMMs from working (vmx) or using invalid TLB entries (svm). Currently KVM activates virtualization when the respective kernel module is loaded. This blocks us from autoloading KVM modules without breaking other VMMs. To circumvent this problem at least a bit, this patch introduces on demand activation of virtualization. This means, that instead virtualization is enabled on creation of the first virtual machine and disabled on destruction of the last one. So using this, KVM can be easily autoloaded, while keeping other hypervisors usable. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/powerpc/kvm')
-rw-r--r--arch/powerpc/kvm/powerpc.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 95af62217b6..5902bbc2411 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -78,8 +78,9 @@ int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
return r;
}
-void kvm_arch_hardware_enable(void *garbage)
+int kvm_arch_hardware_enable(void *garbage)
{
+ return 0;
}
void kvm_arch_hardware_disable(void *garbage)