diff options
Diffstat (limited to 'sys/amd64/vmm/vmm_ioport.c')
| -rw-r--r-- | sys/amd64/vmm/vmm_ioport.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/sys/amd64/vmm/vmm_ioport.c b/sys/amd64/vmm/vmm_ioport.c index fc1ecab9f209..8aab28f5e68e 100644 --- a/sys/amd64/vmm/vmm_ioport.c +++ b/sys/amd64/vmm/vmm_ioport.c @@ -145,9 +145,49 @@ emulate_inout_port(struct vcpu *vcpu, struct vm_exit *vmexit, bool *retu) } static int +decode_segment(struct vcpu *vcpu, enum vm_reg_name *segment) +{ + struct vm_guest_paging *paging; + struct vie vie; + struct vm_exit *vme; + int err; + int fault; + + vme = vm_exitinfo(vcpu); + paging = &vme->u.inout_str.paging; + + vie_init(&vie, NULL, 0); + err = vmm_fetch_instruction(vcpu, paging, + vme->rip + vme->u.inout_str.cs_base, VIE_INST_SIZE, &vie, &fault); + if (err || fault) + return (err); + + err = vmm_decode_instruction(vcpu, VIE_INVALID_GLA, paging->cpu_mode, + vme->u.inout_str.cs_d, &vie); + + if (err || vie.op.op_type != VIE_OP_TYPE_OUTS) + return (EINVAL); + if (vie.segment_override) + *segment = vie.segment_register; + else + *segment = VM_REG_GUEST_DS; + + return (0); +} + +static int emulate_inout_str(struct vcpu *vcpu, struct vm_exit *vmexit, bool *retu) { + int err; + *retu = true; + if (vmexit->u.inout_str.seg_name == VM_REG_LAST) { + err = decode_segment(vcpu, &vmexit->u.inout_str.seg_name); + if (err) + return (err); + return (vm_get_seg_desc(vcpu, vmexit->u.inout_str.seg_name, + &vmexit->u.inout_str.seg_desc)); + } return (0); /* Return to userspace to finish emulation */ } |