hw/arm/bcm2836: Only provide "enabled-cpus" property to multicore SoCs
[qemu.git] / hw / s390x / s390-virtio-hcall.c
1 /*
2 * Support for virtio hypercalls on s390
3 *
4 * Copyright 2012 IBM Corp.
5 * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
6 *
7 * This work is licensed under the terms of the GNU GPL, version 2 or (at
8 * your option) any later version. See the COPYING file in the top-level
9 * directory.
10 */
11
12 #include "qemu/osdep.h"
13 #include "cpu.h"
14 #include "hw/s390x/s390-virtio-hcall.h"
15
16 #define MAX_DIAG_SUBCODES 255
17
18 static s390_virtio_fn s390_diag500_table[MAX_DIAG_SUBCODES];
19
20 void s390_register_virtio_hypercall(uint64_t code, s390_virtio_fn fn)
21 {
22 assert(code < MAX_DIAG_SUBCODES);
23 assert(!s390_diag500_table[code]);
24
25 s390_diag500_table[code] = fn;
26 }
27
28 int s390_virtio_hypercall(CPUS390XState *env)
29 {
30 s390_virtio_fn fn;
31
32 if (env->regs[1] < MAX_DIAG_SUBCODES) {
33 fn = s390_diag500_table[env->regs[1]];
34 if (fn) {
35 env->regs[2] = fn(&env->regs[2]);
36 return 0;
37 }
38 }
39
40 return -EINVAL;
41 }