| Jan Beulich | cf47a83 | 2012-10-19 15:25:37 -0400 | [diff] [blame] | 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 | |
| 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 | |
| 47 | int HYPERVISOR_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 | } |