KVM: pending irq save/restore

Add in kernel irqchip save/restore support for pending vectors.

[avi: fix compile warning on i386]
[avi: remove printk]

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, 16 insertions, 0 deletions

diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index 7ec8cf84e6ea..6c371ea21046 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -790,6 +790,20 @@ static int set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg)
         return 0;
 }
 
+static int vmx_get_irq(struct kvm_vcpu *vcpu)
+{
+        u32 idtv_info_field;
+
+        idtv_info_field = vmcs_read32(IDT_VECTORING_INFO_FIELD);
+        if (idtv_info_field & INTR_INFO_VALID_MASK) {
+                if (is_external_interrupt(idtv_info_field))
+                        return idtv_info_field & VECTORING_INFO_VECTOR_MASK;
+                else
+                        printk("pending exception: not handled yet\n");
+        }
+        return -1;
+}
+
 static __init int cpu_has_kvm_support(void)
 {
         unsigned long ecx = cpuid_ecx(1);
@@ -2500,6 +2514,8 @@ static struct kvm_arch_ops vmx_arch_ops = {
         .run = vmx_vcpu_run,
         .skip_emulated_instruction = skip_emulated_instruction,
         .patch_hypercall = vmx_patch_hypercall,
+        .get_irq = vmx_get_irq,
+        .set_irq = vmx_inject_irq,
 };
 
 static int __init vmx_init(void)