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>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index e0a2f13faf8b..a5790cb21ffc 100644
--- a/drivers/kvm/kvm.h
+++ b/drivers/kvm/kvm.h
@@ -324,6 +324,7 @@ struct kvm_vcpu {
         u64 pdptrs[4]; /* pae */
         u64 shadow_efer;
         u64 apic_base;
+        struct kvm_lapic *apic;    /* kernel irqchip context */
         u64 ia32_misc_enable_msr;
 
         struct kvm_mmu mmu;
@@ -569,8 +570,6 @@ void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0);
 void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0);
 void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0);
 unsigned long get_cr8(struct kvm_vcpu *vcpu);
-u64 kvm_get_apic_base(struct kvm_vcpu *vcpu);
-void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data);
 void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
 
 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);