diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kvm/x86.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 724a6ad08643..0990f0a459d6 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -2782,6 +2782,9 @@ int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest) { struct kvm_vcpu *vcpu = ctxt->vcpu; + if (!kvm_x86_ops->get_dr) + return X86EMUL_UNHANDLEABLE; + switch (dr) { case 0 ... 3: *dest = kvm_x86_ops->get_dr(vcpu, dr); @@ -2797,6 +2800,9 @@ int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U; int exception; + if (!kvm_x86_ops->set_dr) + return X86EMUL_UNHANDLEABLE; + kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception); if (exception) { /* FIXME: better handling */ |