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KVM: Add per-vm capability enablement.
Allow KVM_ENABLE_CAP to act on a vm as well as on a vcpu. This makes more sense when the caller wants to enable a vm-related capability. s390 will be the first user; wire it up. Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
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36c9549460
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3 changed files with 33 additions and 2 deletions
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@ -932,9 +932,9 @@ documentation when it pops into existence).
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4.37 KVM_ENABLE_CAP
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Capability: KVM_CAP_ENABLE_CAP
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Capability: KVM_CAP_ENABLE_CAP, KVM_CAP_ENABLE_CAP_VM
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Architectures: ppc, s390
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Type: vcpu ioctl
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Type: vcpu ioctl, vm ioctl (with KVM_CAP_ENABLE_CAP_VM)
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Parameters: struct kvm_enable_cap (in)
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Returns: 0 on success; -1 on error
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@ -965,6 +965,8 @@ function properly, this is the place to put them.
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__u8 pad[64];
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};
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The vcpu ioctl should be used for vcpu-specific capabilities, the vm ioctl
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for vm-wide capabilities.
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4.38 KVM_GET_MP_STATE
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@ -159,6 +159,7 @@ int kvm_dev_ioctl_check_extension(long ext)
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case KVM_CAP_S390_CSS_SUPPORT:
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case KVM_CAP_IOEVENTFD:
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case KVM_CAP_DEVICE_CTRL:
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case KVM_CAP_ENABLE_CAP_VM:
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r = 1;
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break;
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case KVM_CAP_NR_VCPUS:
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@ -187,6 +188,21 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
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return 0;
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}
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static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
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{
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int r;
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if (cap->flags)
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return -EINVAL;
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switch (cap->cap) {
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default:
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r = -EINVAL;
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break;
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}
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return r;
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}
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long kvm_arch_vm_ioctl(struct file *filp,
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unsigned int ioctl, unsigned long arg)
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{
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@ -204,6 +220,14 @@ long kvm_arch_vm_ioctl(struct file *filp,
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r = kvm_s390_inject_vm(kvm, &s390int);
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break;
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}
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case KVM_ENABLE_CAP: {
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struct kvm_enable_cap cap;
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r = -EFAULT;
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if (copy_from_user(&cap, argp, sizeof(cap)))
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break;
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r = kvm_vm_ioctl_enable_cap(kvm, &cap);
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break;
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}
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default:
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r = -ENOTTY;
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}
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@ -741,6 +741,7 @@ struct kvm_ppc_smmu_info {
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#define KVM_CAP_EXT_EMUL_CPUID 95
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#define KVM_CAP_HYPERV_TIME 96
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#define KVM_CAP_IOAPIC_POLARITY_IGNORED 97
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#define KVM_CAP_ENABLE_CAP_VM 98
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#ifdef KVM_CAP_IRQ_ROUTING
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@ -1076,6 +1077,10 @@ struct kvm_s390_ucas_mapping {
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/* Available with KVM_CAP_DEBUGREGS */
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#define KVM_GET_DEBUGREGS _IOR(KVMIO, 0xa1, struct kvm_debugregs)
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#define KVM_SET_DEBUGREGS _IOW(KVMIO, 0xa2, struct kvm_debugregs)
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/*
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* vcpu version available with KVM_ENABLE_CAP
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* vm version available with KVM_CAP_ENABLE_CAP_VM
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*/
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#define KVM_ENABLE_CAP _IOW(KVMIO, 0xa3, struct kvm_enable_cap)
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/* Available with KVM_CAP_XSAVE */
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#define KVM_GET_XSAVE _IOR(KVMIO, 0xa4, struct kvm_xsave)
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