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
8int 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}
45EXPORT_SYMBOL_GPL(xen_event_channel_op_compat);
46
47int 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}
81EXPORT_SYMBOL_GPL(xen_physdev_op_compat);
82