[RFC PATCH 1/3] KVM: s390: Move out initialization code.

[Cornelia Huck <cornelia.huck@de.ibm.com>]

kvm-s390's module initialization code needs to live in a separate
module (kvm-s390.ko) if we want to include eventfd (which has its
own module init func).

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
---
 arch/s390/kvm/Makefile   |  4 +++-
 arch/s390/kvm/init.c     | 52 ++++++++++++++++++++++++++++++++++++++++++++++++
 arch/s390/kvm/kvm-s390.c | 38 ++++-------------------------------
 3 files changed, 59 insertions(+), 35 deletions(-)
 create mode 100644 arch/s390/kvm/init.c

diff --git a/arch/s390/kvm/Makefile b/arch/s390/kvm/Makefile
index 3975722..2441ffd 100644
--- a/arch/s390/kvm/Makefile
+++ b/arch/s390/kvm/Makefile
@@ -11,4 +11,6 @@ common-objs = $(addprefix ../../../virt/kvm/, kvm_main.o)
 ccflags-y := -Ivirt/kvm -Iarch/s390/kvm
 
 kvm-objs := $(common-objs) kvm-s390.o intercept.o interrupt.o priv.o sigp.o diag.o
-obj-$(CONFIG_KVM) += kvm.o
+kvm_s390-objs := init.o
+
+obj-$(CONFIG_KVM) += kvm.o kvm_s390.o
diff --git a/arch/s390/kvm/init.c b/arch/s390/kvm/init.c
new file mode 100644
index 0000000..dc4028a
--- /dev/null
+++ b/arch/s390/kvm/init.c
@@ -0,0 +1,52 @@
+/*
+ * kvm on s390 module initialization
+ *
+ * Copyright IBM Corp. 2013
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License (version 2 only)
+ * as published by the Free Software Foundation.
+ *
+ *    Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
+ */
+
+#include <linux/kvm.h>
+#include <linux/kvm_host.h>
+#include <linux/module.h>
+#include "kvm-s390.h"
+
+extern unsigned long long *facilities;
+
+static int __init kvm_s390_init(void)
+{
+	int ret;
+	ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
+	if (ret)
+		return ret;
+
+	/*
+	 * guests can ask for up to 255+1 double words, we need a full page
+	 * to hold the maximum amount of facilities. On the other hand, we
+	 * only set facilities that are known to work in KVM.
+	 */
+	facilities = (unsigned long long *) get_zeroed_page(GFP_KERNEL|GFP_DMA);
+	if (!facilities) {
+		kvm_exit();
+		return -ENOMEM;
+	}
+	memcpy(facilities, S390_lowcore.stfle_fac_list, 16);
+	facilities[0] &= 0xff00fff3f47c0000ULL;
+	facilities[1] &= 0x001c000000000000ULL;
+	return 0;
+}
+
+static void __exit kvm_s390_exit(void)
+{
+	free_page((unsigned long) facilities);
+	kvm_exit();
+}
+
+module_init(kvm_s390_init);
+module_exit(kvm_s390_exit);
+
+MODULE_LICENSE("GPL");
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index f822d36..58a5f03 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -36,6 +36,9 @@
 #include "trace.h"
 #include "trace-s390.h"
 
+unsigned long long *facilities;
+EXPORT_SYMBOL_GPL(facilities);
+
 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
 
 struct kvm_stats_debugfs_item debugfs_entries[] = {
@@ -83,8 +86,6 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
 	{ NULL }
 };
 
-static unsigned long long *facilities;
-
 /* Section: not file related */
 int kvm_arch_hardware_enable(void *garbage)
 {
@@ -823,6 +824,7 @@ int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
 		return -EFAULT;
 	return 0;
 }
+EXPORT_SYMBOL_GPL(kvm_s390_vcpu_store_status);
 
 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
 				     struct kvm_enable_cap *cap)
@@ -1026,35 +1028,3 @@ void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 				   struct kvm_memory_slot *slot)
 {
 }
-
-static int __init kvm_s390_init(void)
-{
-	int ret;
-	ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
-	if (ret)
-		return ret;
-
-	/*
-	 * guests can ask for up to 255+1 double words, we need a full page
-	 * to hold the maximum amount of facilities. On the other hand, we
-	 * only set facilities that are known to work in KVM.
-	 */
-	facilities = (unsigned long long *) get_zeroed_page(GFP_KERNEL|GFP_DMA);
-	if (!facilities) {
-		kvm_exit();
-		return -ENOMEM;
-	}
-	memcpy(facilities, S390_lowcore.stfle_fac_list, 16);
-	facilities[0] &= 0xff00fff3f47c0000ULL;
-	facilities[1] &= 0x001c000000000000ULL;
-	return 0;
-}
-
-static void __exit kvm_s390_exit(void)
-{
-	free_page((unsigned long) facilities);
-	kvm_exit();
-}
-
-module_init(kvm_s390_init);
-module_exit(kvm_s390_exit);
-- 
1.7.12.4