[qemu.git] / hw / s390x / s390-virtio-hcall.c

/*
 * Support for virtio hypercalls on s390
 *
 * Copyright 2012 IBM Corp.
 * Author(s): Cornelia Huck <[email protected]>
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or (at
 * your option) any later version. See the COPYING file in the top-level
 * directory.
 */

#include "cpu.h"
#include "hw/s390x/s390-virtio.h"

#define MAX_DIAG_SUBCODES 255

static s390_virtio_fn s390_diag500_table[MAX_DIAG_SUBCODES];

void s390_register_virtio_hypercall(uint64_t code, s390_virtio_fn fn)
{
    assert(code < MAX_DIAG_SUBCODES);
    assert(!s390_diag500_table[code]);

    s390_diag500_table[code] = fn;
}

int s390_virtio_hypercall(CPUS390XState *env)
{
    s390_virtio_fn fn = s390_diag500_table[env->regs[1]];

    if (!fn) {
        return -EINVAL;
    }

    return fn(&env->regs[2]);
}
Commit	Line	Data
28e942f8 CH	1	/*
	2	* Support for virtio hypercalls on s390
	3	*
	4	* Copyright 2012 IBM Corp.
	5	* Author(s): Cornelia Huck <[email protected]>
	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 "cpu.h"
b73d3531	13	#include "hw/s390x/s390-virtio.h"
28e942f8 CH	14
	15	#define MAX_DIAG_SUBCODES 255
	16
	17	static s390_virtio_fn s390_diag500_table[MAX_DIAG_SUBCODES];
	18
	19	void s390_register_virtio_hypercall(uint64_t code, s390_virtio_fn fn)
	20	{
	21	assert(code < MAX_DIAG_SUBCODES);
	22	assert(!s390_diag500_table[code]);
	23
	24	s390_diag500_table[code] = fn;
	25	}
	26
	27	int s390_virtio_hypercall(CPUS390XState *env)
	28	{
	29	s390_virtio_fn fn = s390_diag500_table[env->regs[1]];
	30
	31	if (!fn) {
	32	return -EINVAL;
	33	}
	34
	35	return fn(&env->regs[2]);
	36	}