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KVM: s390: add parameter for KVM_CREATE_VM

Forráskód böngészése 
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>
This commit is contained in:
Carsten Otte
2012-01-04 10:25:20 +01:00
committed by Avi Kivity
szülő a138fe7535
commit e08b963716
10 fájl változott, egészen pontosan 65 új sor hozzáadva és 18 régi sor törölve
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24
arch/s390/kvm/kvm-s390.c
Fájl megtekintése

@@ -171,11 +171,22 @@ long kvm_arch_vm_ioctl(struct file *filp,
return r;
}
int kvm_arch_init_vm(struct kvm *kvm)
int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
{
int rc;
char debug_name[16];
rc = -EINVAL;
#ifdef CONFIG_KVM_S390_UCONTROL
if (type & ~KVM_VM_S390_UCONTROL)
goto out_err;
if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN)))
goto out_err;
#else
if (type)
goto out_err;
#endif
rc = s390_enable_sie();
if (rc)
goto out_err;
@@ -198,10 +209,13 @@ int kvm_arch_init_vm(struct kvm *kvm)
debug_register_view(kvm->arch.dbf, &debug_sprintf_view);
VM_EVENT(kvm, 3, "%s", "vm created");
kvm->arch.gmap = gmap_alloc(current->mm);
if (!kvm->arch.gmap)
goto out_nogmap;
if (type & KVM_VM_S390_UCONTROL) {
kvm->arch.gmap = NULL;
} else {
kvm->arch.gmap = gmap_alloc(current->mm);
if (!kvm->arch.gmap)
goto out_nogmap;
}
return 0;
out_nogmap:
debug_unregister(kvm->arch.dbf);