kvm: Move kvm_allows_irq0_override() to target-i386, fix return type

kvm_allows_irq0_override() is a totally x86 specific concept:
move it to the target-specific source file where it belongs.
This means we need a new header file for the prototype:
kvm_i386.h, in line with the existing kvm_ppc.h.

While we are moving it, fix the return type to be 'bool' rather
than 'int'.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Avi Kivity <avi@redhat.com>

hw/pc.c

@@ -42,6 +42,7 @@
 #include "sysbus.h"
 #include "sysemu.h"
 #include "kvm.h"
+#include "kvm_i386.h"
 #include "xen.h"
 #include "blockdev.h"
 #include "hw/block-common.h"

kvm-all.c

@@ -1701,11 +1701,6 @@ int kvm_has_gsi_routing(void)
 #endif
 }
 
-int kvm_allows_irq0_override(void)
-{
-    return !kvm_irqchip_in_kernel() || kvm_has_gsi_routing();
-}
-
 void *kvm_vmalloc(ram_addr_t size)
 {
 #ifdef TARGET_S390X

kvm-stub.c

@@ -72,11 +72,6 @@ int kvm_has_many_ioeventfds(void)
     return 0;
 }
 
-int kvm_allows_irq0_override(void)
-{
-    return 1;
-}
-
 int kvm_has_pit_state2(void)
 {
     return 0;

kvm.h

@@ -75,8 +75,6 @@ int kvm_has_pit_state2(void);
 int kvm_has_many_ioeventfds(void);
 int kvm_has_gsi_routing(void);
 
-int kvm_allows_irq0_override(void);
-
 #ifdef NEED_CPU_H
 int kvm_init_vcpu(CPUArchState *env);
 

target-i386/Makefile.objs

@@ -3,6 +3,7 @@ obj-y += excp_helper.o fpu_helper.o cc_helper.o int_helper.o svm_helper.o
 obj-y += smm_helper.o misc_helper.o mem_helper.o seg_helper.o
 obj-$(CONFIG_SOFTMMU) += machine.o arch_memory_mapping.o arch_dump.o
 obj-$(CONFIG_KVM) += kvm.o hyperv.o
+obj-$(CONFIG_NO_KVM) += kvm-stub.o
 obj-$(CONFIG_LINUX_USER) += ioport-user.o
 obj-$(CONFIG_BSD_USER) += ioport-user.o
 

target-i386/kvm-stub.c

@@ -0,0 +1,18 @@
+/*
+ * QEMU KVM x86 specific function stubs
+ *
+ * Copyright Linaro Limited 2012
+ *
+ * Author: Peter Maydell <peter.maydell@linaro.org>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+#include "qemu-common.h"
+#include "kvm_i386.h"
+
+bool kvm_allows_irq0_override(void)
+{
+    return 1;
+}

target-i386/kvm.c

@@ -23,6 +23,7 @@
 #include "qemu-common.h"
 #include "sysemu.h"
 #include "kvm.h"
+#include "kvm_i386.h"
 #include "cpu.h"
 #include "gdbstub.h"
 #include "host-utils.h"
@@ -65,6 +66,11 @@ static bool has_msr_async_pf_en;
 static bool has_msr_misc_enable;
 static int lm_capable_kernel;
 
+bool kvm_allows_irq0_override(void)
+{
+    return !kvm_irqchip_in_kernel() || kvm_has_gsi_routing();
+}
+
 static struct kvm_cpuid2 *try_get_cpuid(KVMState *s, int max)
 {
     struct kvm_cpuid2 *cpuid;

target-i386/kvm_i386.h

@@ -0,0 +1,16 @@
+/*
+ * QEMU KVM support -- x86 specific functions.
+ *
+ * Copyright (c) 2012 Linaro Limited
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef QEMU_KVM_I386_H
+#define QEMU_KVM_I386_H
+
+bool kvm_allows_irq0_override(void);
+
+#endif