KVM: Wire up hypercall handlers to a central arch-independent location

Signed-off-by: Avi Kivity <avi@qumranet.com>

1 files changed, 36 insertions, 0 deletions

diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index 757a41f1db84..2be9738dfd78 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -1138,6 +1138,42 @@ int emulate_instruction(struct kvm_vcpu *vcpu,
 }
 EXPORT_SYMBOL_GPL(emulate_instruction);
 
+int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run)
+{
+        unsigned long nr, a0, a1, a2, a3, a4, a5, ret;
+
+        kvm_arch_ops->decache_regs(vcpu);
+        ret = -KVM_EINVAL;
+#ifdef CONFIG_X86_64
+        if (is_long_mode(vcpu)) {
+                nr = vcpu->regs[VCPU_REGS_RAX];
+                a0 = vcpu->regs[VCPU_REGS_RDI];
+                a1 = vcpu->regs[VCPU_REGS_RSI];
+                a2 = vcpu->regs[VCPU_REGS_RDX];
+                a3 = vcpu->regs[VCPU_REGS_RCX];
+                a4 = vcpu->regs[VCPU_REGS_R8];
+                a5 = vcpu->regs[VCPU_REGS_R9];
+        } else
+#endif
+        {
+                nr = vcpu->regs[VCPU_REGS_RBX] & -1u;
+                a0 = vcpu->regs[VCPU_REGS_RAX] & -1u;
+                a1 = vcpu->regs[VCPU_REGS_RCX] & -1u;
+                a2 = vcpu->regs[VCPU_REGS_RDX] & -1u;
+                a3 = vcpu->regs[VCPU_REGS_RSI] & -1u;
+                a4 = vcpu->regs[VCPU_REGS_RDI] & -1u;
+                a5 = vcpu->regs[VCPU_REGS_RBP] & -1u;
+        }
+        switch (nr) {
+        default:
+                ;
+        }
+        vcpu->regs[VCPU_REGS_RAX] = ret;
+        kvm_arch_ops->cache_regs(vcpu);
+        return 1;
+}
+EXPORT_SYMBOL_GPL(kvm_hypercall);
+
 static u64 mk_cr_64(u64 curr_cr, u32 new_val)
 {
         return (curr_cr & ~((1ULL << 32) - 1)) | new_val;