cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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s390-virtio-hcall.c (950B)

      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
     18static s390_virtio_fn s390_diag500_table[MAX_DIAG_SUBCODES];
     19
     20void 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
     28int 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}