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authorCarsten Otte <cotte@de.ibm.com>2012-01-04 10:25:20 +0100
committerAvi Kivity <avi@redhat.com>2012-03-05 14:52:18 +0200
commite08b96371625aaa84cb03f51acc4c8e0be27403a (patch)
treed0b140e8558c6145e1a3183809c7797be443bd68 /virt
parenta138fe7535c0ec778465c7b54b1aaaf4cfd885b7 (diff)
downloadlinux-e08b96371625aaa84cb03f51acc4c8e0be27403a.tar.gz
KVM: s390: add parameter for KVM_CREATE_VM
This patch introduces a new config option for user controlled kernel virtual machines. It introduces a parameter to KVM_CREATE_VM that allows to set bits that alter the capabilities of the newly created virtual machine. The parameter is passed to kvm_arch_init_vm for all architectures. The only valid modifier bit for now is KVM_VM_S390_UCONTROL. This requires CAP_SYS_ADMIN privileges and creates a user controlled virtual machine on s390 architectures. Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/kvm_main.c13
1 files changed, 5 insertions, 8 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index a91f980077d..32e3b048a6c 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -449,7 +449,7 @@ static void kvm_init_memslots_id(struct kvm *kvm)
slots->id_to_index[i] = slots->memslots[i].id = i;
}
-static struct kvm *kvm_create_vm(void)
+static struct kvm *kvm_create_vm(unsigned long type)
{
int r, i;
struct kvm *kvm = kvm_arch_alloc_vm();
@@ -457,7 +457,7 @@ static struct kvm *kvm_create_vm(void)
if (!kvm)
return ERR_PTR(-ENOMEM);
- r = kvm_arch_init_vm(kvm);
+ r = kvm_arch_init_vm(kvm, type);
if (r)
goto out_err_nodisable;
@@ -2198,12 +2198,12 @@ static struct file_operations kvm_vm_fops = {
.llseek = noop_llseek,
};
-static int kvm_dev_ioctl_create_vm(void)
+static int kvm_dev_ioctl_create_vm(unsigned long type)
{
int r;
struct kvm *kvm;
- kvm = kvm_create_vm();
+ kvm = kvm_create_vm(type);
if (IS_ERR(kvm))
return PTR_ERR(kvm);
#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
@@ -2254,10 +2254,7 @@ static long kvm_dev_ioctl(struct file *filp,
r = KVM_API_VERSION;
break;
case KVM_CREATE_VM:
- r = -EINVAL;
- if (arg)
- goto out;
- r = kvm_dev_ioctl_create_vm();
+ r = kvm_dev_ioctl_create_vm(arg);
break;
case KVM_CHECK_EXTENSION:
r = kvm_dev_ioctl_check_extension_generic(arg);