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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crypto_helper.c (1569B)

      1/*
      2 *  s390x crypto helpers
      3 *
      4 *  Copyright (c) 2017 Red Hat Inc
      5 *
      6 *  Authors:
      7 *   David Hildenbrand <david@redhat.com>
      8 *
      9 * This work is licensed under the terms of the GNU GPL, version 2 or later.
     10 * See the COPYING file in the top-level directory.
     11 */
     12
     13#include "qemu/osdep.h"
     14#include "qemu/main-loop.h"
     15#include "s390x-internal.h"
     16#include "tcg_s390x.h"
     17#include "exec/helper-proto.h"
     18#include "exec/exec-all.h"
     19#include "exec/cpu_ldst.h"
     20
     21uint32_t HELPER(msa)(CPUS390XState *env, uint32_t r1, uint32_t r2, uint32_t r3,
     22                     uint32_t type)
     23{
     24    const uintptr_t ra = GETPC();
     25    const uint8_t mod = env->regs[0] & 0x80ULL;
     26    const uint8_t fc = env->regs[0] & 0x7fULL;
     27    uint8_t subfunc[16] = { 0 };
     28    uint64_t param_addr;
     29    int i;
     30
     31    switch (type) {
     32    case S390_FEAT_TYPE_KMAC:
     33    case S390_FEAT_TYPE_KIMD:
     34    case S390_FEAT_TYPE_KLMD:
     35    case S390_FEAT_TYPE_PCKMO:
     36    case S390_FEAT_TYPE_PCC:
     37        if (mod) {
     38            tcg_s390_program_interrupt(env, PGM_SPECIFICATION, ra);
     39        }
     40        break;
     41    }
     42
     43    s390_get_feat_block(type, subfunc);
     44    if (!test_be_bit(fc, subfunc)) {
     45        tcg_s390_program_interrupt(env, PGM_SPECIFICATION, ra);
     46    }
     47
     48    switch (fc) {
     49    case 0: /* query subfunction */
     50        for (i = 0; i < 16; i++) {
     51            param_addr = wrap_address(env, env->regs[1] + i);
     52            cpu_stb_data_ra(env, param_addr, subfunc[i], ra);
     53        }
     54        break;
     55    default:
     56        /* we don't implement any other subfunction yet */
     57        g_assert_not_reached();
     58    }
     59
     60    return 0;
     61}