cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

s390-skeys-kvm.c (2283B)

      1/*
      2 * s390 storage key device
      3 *
      4 * Copyright 2015 IBM Corp.
      5 * Author(s): Jason J. Herne <jjherne@linux.vnet.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 "hw/s390x/storage-keys.h"
     14#include "sysemu/kvm.h"
     15#include "qemu/error-report.h"
     16#include "qemu/module.h"
     17
     18static bool kvm_s390_skeys_are_enabled(S390SKeysState *ss)
     19{
     20    S390SKeysClass *skeyclass = S390_SKEYS_GET_CLASS(ss);
     21    uint8_t single_key;
     22    int r;
     23
     24    r = skeyclass->get_skeys(ss, 0, 1, &single_key);
     25    if (r != 0 && r != KVM_S390_GET_SKEYS_NONE) {
     26        error_report("S390_GET_KEYS error %d", r);
     27    }
     28    return (r == 0);
     29}
     30
     31static int kvm_s390_skeys_get(S390SKeysState *ss, uint64_t start_gfn,
     32                              uint64_t count, uint8_t *keys)
     33{
     34    struct kvm_s390_skeys args = {
     35        .start_gfn = start_gfn,
     36        .count = count,
     37        .skeydata_addr = (__u64)keys
     38    };
     39
     40    return kvm_vm_ioctl(kvm_state, KVM_S390_GET_SKEYS, &args);
     41}
     42
     43static int kvm_s390_skeys_set(S390SKeysState *ss, uint64_t start_gfn,
     44                              uint64_t count, uint8_t *keys)
     45{
     46    struct kvm_s390_skeys args = {
     47        .start_gfn = start_gfn,
     48        .count = count,
     49        .skeydata_addr = (__u64)keys
     50    };
     51
     52    return kvm_vm_ioctl(kvm_state, KVM_S390_SET_SKEYS, &args);
     53}
     54
     55static void kvm_s390_skeys_class_init(ObjectClass *oc, void *data)
     56{
     57    S390SKeysClass *skeyclass = S390_SKEYS_CLASS(oc);
     58    DeviceClass *dc = DEVICE_CLASS(oc);
     59
     60    skeyclass->skeys_are_enabled = kvm_s390_skeys_are_enabled;
     61    skeyclass->get_skeys = kvm_s390_skeys_get;
     62    skeyclass->set_skeys = kvm_s390_skeys_set;
     63
     64    /* Reason: Internal device (only one skeys device for the whole memory) */
     65    dc->user_creatable = false;
     66}
     67
     68static const TypeInfo kvm_s390_skeys_info = {
     69    .name          = TYPE_KVM_S390_SKEYS,
     70    .parent        = TYPE_S390_SKEYS,
     71    .instance_size = sizeof(S390SKeysState),
     72    .class_init    = kvm_s390_skeys_class_init,
     73    .class_size    = sizeof(S390SKeysClass),
     74};
     75
     76static void kvm_s390_skeys_register_types(void)
     77{
     78    type_register_static(&kvm_s390_skeys_info);
     79}
     80
     81type_init(kvm_s390_skeys_register_types)