diff options
Diffstat (limited to 'sys/arch')
| -rw-r--r-- | sys/arch/amd64/amd64/vmm.c | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/sys/arch/amd64/amd64/vmm.c b/sys/arch/amd64/amd64/vmm.c index 0add6d373e7..ebf2bce6b36 100644 --- a/sys/arch/amd64/amd64/vmm.c +++ b/sys/arch/amd64/amd64/vmm.c @@ -1,4 +1,4 @@ -/* $OpenBSD: vmm.c,v 1.279 2021/04/05 18:26:45 dv Exp $ */ +/* $OpenBSD: vmm.c,v 1.280 2021/04/06 00:19:58 dv Exp $ */ /* * Copyright (c) 2014 Mike Larkin <mlarkin@openbsd.org> * @@ -5511,13 +5511,31 @@ svm_handle_np_fault(struct vcpu *vcpu) * Request a new page to be faulted into the UVM map of the VM owning 'vcpu' * at address 'gpa'. * - * Returns EAGAIN to indication a protection fault, ie writing to a read only - * page. + * Parameters: + * vcpu: guest VCPU requiring the page to be faulted into the UVM map + * gpa: guest physical address that triggered the fault + * + * Return Values: + * 0: if successful + * EINVAL: if fault type could not be determined + * EAGAIN: if a protection fault occurred, ie writing to a read-only page + * errno: if uvm_fault(9) fails to wire in the page */ int vmx_fault_page(struct vcpu *vcpu, paddr_t gpa) { - int ret; + int fault_type, ret; + + fault_type = vmx_get_guest_faulttype(); + if (fault_type == -1) { + printf("%s: invalid fault type\n", __func__); + return (EINVAL); + } + + if (fault_type == VM_FAULT_PROTECT) { + vcpu->vc_exit.vee.vee_fault_type = VEE_FAULT_PROTECT; + return (EAGAIN); + } ret = uvm_fault(vcpu->vc_parent->vm_map, gpa, VM_FAULT_WIRE, PROT_READ | PROT_WRITE | PROT_EXEC); |