Displaying 4 results from an estimated 4 matches for "off_bitmap".
2020 Feb 07
0
[RFC PATCH v7 38/78] KVM: introspection: add permission access ioctls
...equested, nbits);
+ else
+ bitmap_andnot(dest, dest, requested, nbits);
+
+out:
+ mutex_unlock(&kvm->kvmi_lock);
+
+ return err;
+}
+
+int kvmi_ioctl_event(struct kvm *kvm, void __user *argp)
+{
+ DECLARE_BITMAP(requested, KVMI_NUM_EVENTS);
+ DECLARE_BITMAP(known, KVMI_NUM_EVENTS);
+ size_t off_bitmap;
+ bool allow;
+ int err;
+ int id;
+
+ err = kvmi_ioctl_get_feature(argp, &allow, &id, requested);
+ if (err)
+ return err;
+
+ bitmap_from_u64(known, KVMI_KNOWN_EVENTS);
+ bitmap_and(requested, requested, known, KVMI_NUM_EVENTS);
+
+ off_bitmap = offsetof(struct kvm_introspection, event_...
2020 Feb 07
0
[RFC PATCH v7 40/78] KVM: introspection: add KVMI_GET_VERSION
...sted, known, KVMI_NUM_COMMANDS);
+ if (!allow) {
+ DECLARE_BITMAP(always_allowed, KVMI_NUM_COMMANDS);
+
+ if (id == KVMI_GET_VERSION)
+ return -EPERM;
+
+ set_bit(KVMI_GET_VERSION, always_allowed);
+
+ bitmap_andnot(requested, requested, always_allowed,
+ KVMI_NUM_COMMANDS);
+ }
+
off_bitmap = offsetof(struct kvm_introspection, cmd_allow_mask);
return kvmi_ioctl_feature(kvm, allow, requested, off_bitmap,
diff --git a/virt/kvm/introspection/kvmi_int.h b/virt/kvm/introspection/kvmi_int.h
index 46ba90cb5e66..947af4615fa5 100644
--- a/virt/kvm/introspection/kvmi_int.h
+++ b/virt/kvm/in...
2020 Feb 07
0
[RFC PATCH v7 43/78] KVM: introspection: add KVMI_EVENT_UNHOOK
...ND, kvmi->cmd_allow_mask);
set_bit(KVMI_VM_CHECK_EVENT, kvmi->cmd_allow_mask);
+ atomic_set(&kvmi->ev_seq, 0);
+
kvmi->kvm = kvm;
return kvmi;
@@ -324,3 +326,31 @@ int kvmi_ioctl_command(struct kvm *kvm, void __user *argp)
return kvmi_ioctl_feature(kvm, allow, requested, off_bitmap,
KVMI_NUM_COMMANDS);
}
+
+static bool kvmi_unhook_event(struct kvm_introspection *kvmi)
+{
+ int err;
+
+ err = kvmi_msg_send_unhook(kvmi);
+
+ return !err;
+}
+
+int kvmi_ioctl_preunhook(struct kvm *kvm)
+{
+ struct kvm_introspection *kvmi;
+ int err = 0;
+
+ mutex_lock(&kvm->kvmi_l...
2020 Feb 07
78
[RFC PATCH v7 00/78] VM introspection
The KVM introspection subsystem provides a facility for applications
running on the host or in a separate VM, to control the execution of
other VMs (pause, resume, shutdown), query the state of the vCPUs (GPRs,
MSRs etc.), alter the page access bits in the shadow page tables (only
for the hardware backed ones, eg. Intel's EPT) and receive notifications
when events of interest have taken place