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authorEddie Dong <eddie.dong@intel.com>2007-09-12 10:58:04 +0300
committerAvi Kivity <avi@qumranet.com>2007-10-13 10:18:25 +0200
commit97222cc8316328965851ed28d23f6b64b4c912d2 (patch)
tree469b2f72e74046a7aec5061df194c3f68812a224 /drivers/kvm/vmx.c
parent7017fc3d1a12e30ea7df4992152978a188433457 (diff)
KVM: Emulate local APIC in kernel
Because lightweight exits (exits which don't involve userspace) are many times faster than heavyweight exits, it makes sense to emulate high usage devices in the kernel. The local APIC is one such device, especially for Windows and for SMP, so we add an APIC model to kvm. It also allows in-kernel host-side drivers to inject interrupts without going through userspace. [compile fix on i386 from Jindrich Makovicka] Signed-off-by: Yaozu (Eddie) Dong <Eddie.Dong@intel.com> Signed-off-by: Qing He <qing.he@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm/vmx.c')
-rw-r--r--drivers/kvm/vmx.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index 19676b5a671..c4cc17cc00f 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -2390,6 +2390,12 @@ static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id)
if (err)
goto free_vcpu;
+ if (irqchip_in_kernel(kvm)) {
+ err = kvm_create_lapic(&vmx->vcpu);
+ if (err < 0)
+ goto free_vcpu;
+ }
+
vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (!vmx->guest_msrs) {
err = -ENOMEM;