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

tcg-cpu.c (2964B)

      1/*
      2 * i386 TCG cpu class initialization functions specific to sysemu
      3 *
      4 *  Copyright (c) 2003 Fabrice Bellard
      5 *
      6 * This library is free software; you can redistribute it and/or
      7 * modify it under the terms of the GNU Lesser General Public
      8 * License as published by the Free Software Foundation; either
      9 * version 2 of the License, or (at your option) any later version.
     10 *
     11 * This library is distributed in the hope that it will be useful,
     12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14 * Lesser General Public License for more details.
     15 *
     16 * You should have received a copy of the GNU Lesser General Public
     17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
     18 */
     19
     20#include "qemu/osdep.h"
     21#include "cpu.h"
     22#include "tcg/helper-tcg.h"
     23
     24#include "sysemu/sysemu.h"
     25#include "qemu/units.h"
     26#include "exec/address-spaces.h"
     27
     28#include "tcg/tcg-cpu.h"
     29
     30static void tcg_cpu_machine_done(Notifier *n, void *unused)
     31{
     32    X86CPU *cpu = container_of(n, X86CPU, machine_done);
     33    MemoryRegion *smram =
     34        (MemoryRegion *) object_resolve_path("/machine/smram", NULL);
     35
     36    if (smram) {
     37        cpu->smram = g_new(MemoryRegion, 1);
     38        memory_region_init_alias(cpu->smram, OBJECT(cpu), "smram",
     39                                 smram, 0, 4 * GiB);
     40        memory_region_set_enabled(cpu->smram, true);
     41        memory_region_add_subregion_overlap(cpu->cpu_as_root, 0,
     42                                            cpu->smram, 1);
     43    }
     44}
     45
     46bool tcg_cpu_realizefn(CPUState *cs, Error **errp)
     47{
     48    X86CPU *cpu = X86_CPU(cs);
     49
     50    /*
     51     * The realize order is important, since x86_cpu_realize() checks if
     52     * nothing else has been set by the user (or by accelerators) in
     53     * cpu->ucode_rev and cpu->phys_bits, and the memory regions
     54     * initialized here are needed for the vcpu initialization.
     55     *
     56     * realize order:
     57     * tcg_cpu -> host_cpu -> x86_cpu
     58     */
     59    cpu->cpu_as_mem = g_new(MemoryRegion, 1);
     60    cpu->cpu_as_root = g_new(MemoryRegion, 1);
     61
     62    /* Outer container... */
     63    memory_region_init(cpu->cpu_as_root, OBJECT(cpu), "memory", ~0ull);
     64    memory_region_set_enabled(cpu->cpu_as_root, true);
     65
     66    /*
     67     * ... with two regions inside: normal system memory with low
     68     * priority, and...
     69     */
     70    memory_region_init_alias(cpu->cpu_as_mem, OBJECT(cpu), "memory",
     71                             get_system_memory(), 0, ~0ull);
     72    memory_region_add_subregion_overlap(cpu->cpu_as_root, 0, cpu->cpu_as_mem, 0);
     73    memory_region_set_enabled(cpu->cpu_as_mem, true);
     74
     75    cs->num_ases = 2;
     76    cpu_address_space_init(cs, 0, "cpu-memory", cs->memory);
     77    cpu_address_space_init(cs, 1, "cpu-smm", cpu->cpu_as_root);
     78
     79    /* ... SMRAM with higher priority, linked from /machine/smram.  */
     80    cpu->machine_done.notify = tcg_cpu_machine_done;
     81    qemu_add_machine_init_done_notifier(&cpu->machine_done);
     82    return true;
     83}