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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user_only_helper.c (1672B)

      1/*
      2 *  PowerPC MMU stub handling for user mode emulation
      3 *
      4 *  Copyright (c) 2003-2007 Jocelyn Mayer
      5 *  Copyright (c) 2013 David Gibson, IBM Corporation.
      6 *
      7 * This library is free software; you can redistribute it and/or
      8 * modify it under the terms of the GNU Lesser General Public
      9 * License as published by the Free Software Foundation; either
     10 * version 2.1 of the License, or (at your option) any later version.
     11 *
     12 * This library is distributed in the hope that it will be useful,
     13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
     14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     15 * Lesser General Public License for more details.
     16 *
     17 * You should have received a copy of the GNU Lesser General Public
     18 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
     19 */
     20
     21#include "qemu/osdep.h"
     22#include "cpu.h"
     23#include "exec/exec-all.h"
     24
     25
     26bool ppc_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
     27                      MMUAccessType access_type, int mmu_idx,
     28                      bool probe, uintptr_t retaddr)
     29{
     30    PowerPCCPU *cpu = POWERPC_CPU(cs);
     31    CPUPPCState *env = &cpu->env;
     32    int exception, error_code;
     33
     34    if (access_type == MMU_INST_FETCH) {
     35        exception = POWERPC_EXCP_ISI;
     36        error_code = 0x40000000;
     37    } else {
     38        exception = POWERPC_EXCP_DSI;
     39        error_code = 0x40000000;
     40        if (access_type == MMU_DATA_STORE) {
     41            error_code |= 0x02000000;
     42        }
     43        env->spr[SPR_DAR] = address;
     44        env->spr[SPR_DSISR] = error_code;
     45    }
     46    cs->exception_index = exception;
     47    env->error_code = error_code;
     48    cpu_loop_exit_restore(cs, retaddr);
     49}