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Commit 1af1ac91 authored by David Hildenbrand's avatar David Hildenbrand Committed by Paolo Bonzini
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KVM: x86: allow setting identity map addr with no vcpus only



Changing it afterwards doesn't make too much sense and will only result
in inconsistencies.

Reviewed-by: default avatarRadim Krčmář <rkrcmar@redhat.com>
Signed-off-by: default avatarDavid Hildenbrand <david@redhat.com>
Signed-off-by: default avatarRadim Krčmář <rkrcmar@redhat.com>
parent 726b99c4
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+1 −0
Original line number Diff line number Diff line
@@ -1131,6 +1131,7 @@ This ioctl is required on Intel-based hosts. This is needed on Intel hardware
because of a quirk in the virtualization implementation (see the internals
documentation when it pops into existence).

Fails if any VCPU has already been created.

4.41 KVM_SET_BOOT_CPU_ID

+7 −1
Original line number Diff line number Diff line
@@ -4034,10 +4034,16 @@ long kvm_arch_vm_ioctl(struct file *filp,
	case KVM_SET_IDENTITY_MAP_ADDR: {
		u64 ident_addr;

		mutex_lock(&kvm->lock);
		r = -EINVAL;
		if (kvm->created_vcpus)
			goto set_identity_unlock;
		r = -EFAULT;
		if (copy_from_user(&ident_addr, argp, sizeof ident_addr))
			goto out;
			goto set_identity_unlock;
		r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr);
set_identity_unlock:
		mutex_unlock(&kvm->lock);
		break;
	}
	case KVM_SET_NR_MMU_PAGES: