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

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

drivers/kvm/kvm.h

@@ -482,6 +482,8 @@ void kvm_mmu_post_write(struct kvm_vcpu *vcpu, gpa_t gpa, int bytes);
 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
 void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
 
+int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run);
+
 static inline int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva,
 				     u32 error_code)
 {

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;

drivers/kvm/svm.c

@@ -1078,16 +1078,8 @@ static int halt_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 
 static int vmmcall_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 {
-	printk(KERN_DEBUG "got vmmcall at RIP %08llx\n",
-	       vcpu->svm->vmcb->save.rip);
-	printk(KERN_DEBUG "vmmcall params: %08llx, %08lx, %08lx, %08lx\n",
-	       vcpu->svm->vmcb->save.rax,
-	       vcpu->regs[VCPU_REGS_RCX],
-	       vcpu->regs[VCPU_REGS_RDX],
-	       vcpu->regs[VCPU_REGS_RBP]);
-	vcpu->svm->vmcb->save.rax = 0;
 	vcpu->svm->vmcb->save.rip += 3;
-	return 1;
+	return kvm_hypercall(vcpu, kvm_run);
 }
 
 static int invalid_op_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)

drivers/kvm/vmx.c

@@ -1659,16 +1659,8 @@ static int handle_halt(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 
 static int handle_vmcall(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 {
-	kvm_run->exit_reason = KVM_EXIT_DEBUG;
-	printk(KERN_DEBUG "got vmcall at RIP %08lx\n", vmcs_readl(GUEST_RIP));
-	printk(KERN_DEBUG "vmcall params: %08lx, %08lx, %08lx, %08lx\n",
-		vcpu->regs[VCPU_REGS_RAX],
-		vcpu->regs[VCPU_REGS_RCX],
-		vcpu->regs[VCPU_REGS_RDX],
-		vcpu->regs[VCPU_REGS_RBP]);
-	vcpu->regs[VCPU_REGS_RAX] = 0;
 	vmcs_writel(GUEST_RIP, vmcs_readl(GUEST_RIP)+3);
-	return 1;
+	return kvm_hypercall(vcpu, kvm_run);
 }
 
 /*