From 3f2546b2ef55b661fd8dd69682b38992225e86f6 Mon Sep 17 00:00:00 2001 From: fishsoupisgood Date: Mon, 29 Apr 2019 01:17:54 +0100 Subject: Initial import of qemu-2.4.1 --- hw/s390x/s390-virtio-hcall.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 hw/s390x/s390-virtio-hcall.c (limited to 'hw/s390x/s390-virtio-hcall.c') diff --git a/hw/s390x/s390-virtio-hcall.c b/hw/s390x/s390-virtio-hcall.c new file mode 100644 index 00000000..c7bdc200 --- /dev/null +++ b/hw/s390x/s390-virtio-hcall.c @@ -0,0 +1,40 @@ +/* + * Support for virtio hypercalls on s390 + * + * Copyright 2012 IBM Corp. + * Author(s): Cornelia Huck + * + * 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; + + if (env->regs[1] < MAX_DIAG_SUBCODES) { + fn = s390_diag500_table[env->regs[1]]; + if (fn) { + env->regs[2] = fn(&env->regs[2]); + return 0; + } + } + + return -EINVAL; +} -- cgit v1.2.3