1 #include <linux/kernel.h>
2 #include <linux/string.h>
3 #include <linux/bug.h>
4 #include <linux/export.h>
5 #include <asm/hypervisor.h>
6 #include <asm/xen/hypercall.h>
7
xen_event_channel_op_compat(int cmd,void * arg)8 int xen_event_channel_op_compat(int cmd, void *arg)
9 {
10 struct evtchn_op op;
11 int rc;
12
13 op.cmd = cmd;
14 memcpy(&op.u, arg, sizeof(op.u));
15 rc = _hypercall1(int, event_channel_op_compat, &op);
16
17 switch (cmd) {
18 case EVTCHNOP_close:
19 case EVTCHNOP_send:
20 case EVTCHNOP_bind_vcpu:
21 case EVTCHNOP_unmask:
22 /* no output */
23 break;
24
25 #define COPY_BACK(eop) \
26 case EVTCHNOP_##eop: \
27 memcpy(arg, &op.u.eop, sizeof(op.u.eop)); \
28 break
29
30 COPY_BACK(bind_interdomain);
31 COPY_BACK(bind_virq);
32 COPY_BACK(bind_pirq);
33 COPY_BACK(status);
34 COPY_BACK(alloc_unbound);
35 COPY_BACK(bind_ipi);
36 #undef COPY_BACK
37
38 default:
39 WARN_ON(rc != -ENOSYS);
40 break;
41 }
42
43 return rc;
44 }
45 EXPORT_SYMBOL_GPL(xen_event_channel_op_compat);
46
xen_physdev_op_compat(int cmd,void * arg)47 int xen_physdev_op_compat(int cmd, void *arg)
48 {
49 struct physdev_op op;
50 int rc;
51
52 op.cmd = cmd;
53 memcpy(&op.u, arg, sizeof(op.u));
54 rc = _hypercall1(int, physdev_op_compat, &op);
55
56 switch (cmd) {
57 case PHYSDEVOP_IRQ_UNMASK_NOTIFY:
58 case PHYSDEVOP_set_iopl:
59 case PHYSDEVOP_set_iobitmap:
60 case PHYSDEVOP_apic_write:
61 /* no output */
62 break;
63
64 #define COPY_BACK(pop, fld) \
65 case PHYSDEVOP_##pop: \
66 memcpy(arg, &op.u.fld, sizeof(op.u.fld)); \
67 break
68
69 COPY_BACK(irq_status_query, irq_status_query);
70 COPY_BACK(apic_read, apic_op);
71 COPY_BACK(ASSIGN_VECTOR, irq_op);
72 #undef COPY_BACK
73
74 default:
75 WARN_ON(rc != -ENOSYS);
76 break;
77 }
78
79 return rc;
80 }
81 EXPORT_SYMBOL_GPL(xen_physdev_op_compat);
82