commit de8e5d744051568c8aad35c1c2dcf8fd137d10c9
author Christian Borntraeger <borntraeger@de.ibm.com> Tue Feb 03 09:35:15 2015 +0100
committer Christian Borntraeger <borntraeger@de.ibm.com> Mon Feb 09 12:44:14 2015 +0100
tree 33413aecd118bb8342e95ad3297a06ce322c07a0
parent 658b6eda2042c0fe0e3f8acd7ffd11fc6f280119

KVM: Disable compat ioctl for s390

We never had a 31bit QEMU/kuli running. We would need to review several
ioctls to check if this creates holes, bugs or whatever to make it work.
Lets just disable compat support for KVM on s390.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>

virt/kvm/Kconfig

diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig
index 50d1106..e2c876d 100644
--- a/virt/kvm/Kconfig
+++ b/virt/kvm/Kconfig
@@ -43,3 +43,7 @@
 
 config KVM_GENERIC_DIRTYLOG_READ_PROTECT
        bool
+
+config KVM_COMPAT
+       def_bool y
+       depends on COMPAT && !S390

virt/kvm/kvm_main.c

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 32449e0..8579f18 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -92,7 +92,7 @@
 
 static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl,
 			   unsigned long arg);
-#ifdef CONFIG_COMPAT
+#ifdef CONFIG_KVM_COMPAT
 static long kvm_vcpu_compat_ioctl(struct file *file, unsigned int ioctl,
 				  unsigned long arg);
 #endif
@@ -2052,7 +2052,7 @@
 static struct file_operations kvm_vcpu_fops = {
 	.release        = kvm_vcpu_release,
 	.unlocked_ioctl = kvm_vcpu_ioctl,
-#ifdef CONFIG_COMPAT
+#ifdef CONFIG_KVM_COMPAT
 	.compat_ioctl   = kvm_vcpu_compat_ioctl,
 #endif
 	.mmap           = kvm_vcpu_mmap,
@@ -2342,7 +2342,7 @@
 	return r;
 }
 
-#ifdef CONFIG_COMPAT
+#ifdef CONFIG_KVM_COMPAT
 static long kvm_vcpu_compat_ioctl(struct file *filp,
 				  unsigned int ioctl, unsigned long arg)
 {
@@ -2434,7 +2434,7 @@
 
 static const struct file_operations kvm_device_fops = {
 	.unlocked_ioctl = kvm_device_ioctl,
-#ifdef CONFIG_COMPAT
+#ifdef CONFIG_KVM_COMPAT
 	.compat_ioctl = kvm_device_ioctl,
 #endif
 	.release = kvm_device_release,
@@ -2721,7 +2721,7 @@
 	return r;
 }
 
-#ifdef CONFIG_COMPAT
+#ifdef CONFIG_KVM_COMPAT
 struct compat_kvm_dirty_log {
 	__u32 slot;
 	__u32 padding1;
@@ -2768,7 +2768,7 @@
 static struct file_operations kvm_vm_fops = {
 	.release        = kvm_vm_release,
 	.unlocked_ioctl = kvm_vm_ioctl,
-#ifdef CONFIG_COMPAT
+#ifdef CONFIG_KVM_COMPAT
 	.compat_ioctl   = kvm_vm_compat_ioctl,
 #endif
 	.llseek		= noop_llseek,