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-accel-ops.c (4074B)

      1/*
      2 * QEMU TCG vCPU common functionality
      3 *
      4 * Functionality common to all TCG vCPU variants: mttcg, rr and icount.
      5 *
      6 * Copyright (c) 2003-2008 Fabrice Bellard
      7 * Copyright (c) 2014 Red Hat Inc.
      8 *
      9 * Permission is hereby granted, free of charge, to any person obtaining a copy
     10 * of this software and associated documentation files (the "Software"), to deal
     11 * in the Software without restriction, including without limitation the rights
     12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     13 * copies of the Software, and to permit persons to whom the Software is
     14 * furnished to do so, subject to the following conditions:
     15 *
     16 * The above copyright notice and this permission notice shall be included in
     17 * all copies or substantial portions of the Software.
     18 *
     19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
     22 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
     25 * THE SOFTWARE.
     26 */
     27
     28#include "qemu/osdep.h"
     29#include "qemu-common.h"
     30#include "sysemu/tcg.h"
     31#include "sysemu/replay.h"
     32#include "qemu/main-loop.h"
     33#include "qemu/guest-random.h"
     34#include "exec/exec-all.h"
     35
     36#include "tcg-accel-ops.h"
     37#include "tcg-accel-ops-mttcg.h"
     38#include "tcg-accel-ops-rr.h"
     39#include "tcg-accel-ops-icount.h"
     40
     41/* common functionality among all TCG variants */
     42
     43void tcg_cpu_init_cflags(CPUState *cpu, bool parallel)
     44{
     45    uint32_t cflags = cpu->cluster_index << CF_CLUSTER_SHIFT;
     46    cflags |= parallel ? CF_PARALLEL : 0;
     47    cflags |= icount_enabled() ? CF_USE_ICOUNT : 0;
     48    cpu->tcg_cflags = cflags;
     49}
     50
     51void tcg_cpus_destroy(CPUState *cpu)
     52{
     53    cpu_thread_signal_destroyed(cpu);
     54}
     55
     56int tcg_cpus_exec(CPUState *cpu)
     57{
     58    int ret;
     59#ifdef CONFIG_PROFILER
     60    int64_t ti;
     61#endif
     62    assert(tcg_enabled());
     63#ifdef CONFIG_PROFILER
     64    ti = profile_getclock();
     65#endif
     66    cpu_exec_start(cpu);
     67    ret = cpu_exec(cpu);
     68    cpu_exec_end(cpu);
     69#ifdef CONFIG_PROFILER
     70    qatomic_set(&tcg_ctx->prof.cpu_exec_time,
     71                tcg_ctx->prof.cpu_exec_time + profile_getclock() - ti);
     72#endif
     73    return ret;
     74}
     75
     76/* mask must never be zero, except for A20 change call */
     77void tcg_handle_interrupt(CPUState *cpu, int mask)
     78{
     79    g_assert(qemu_mutex_iothread_locked());
     80
     81    cpu->interrupt_request |= mask;
     82
     83    /*
     84     * If called from iothread context, wake the target cpu in
     85     * case its halted.
     86     */
     87    if (!qemu_cpu_is_self(cpu)) {
     88        qemu_cpu_kick(cpu);
     89    } else {
     90        qatomic_set(&cpu_neg(cpu)->icount_decr.u16.high, -1);
     91    }
     92}
     93
     94static void tcg_accel_ops_init(AccelOpsClass *ops)
     95{
     96    if (qemu_tcg_mttcg_enabled()) {
     97        ops->create_vcpu_thread = mttcg_start_vcpu_thread;
     98        ops->kick_vcpu_thread = mttcg_kick_vcpu_thread;
     99        ops->handle_interrupt = tcg_handle_interrupt;
    100    } else if (icount_enabled()) {
    101        ops->create_vcpu_thread = rr_start_vcpu_thread;
    102        ops->kick_vcpu_thread = rr_kick_vcpu_thread;
    103        ops->handle_interrupt = icount_handle_interrupt;
    104        ops->get_virtual_clock = icount_get;
    105        ops->get_elapsed_ticks = icount_get;
    106    } else {
    107        ops->create_vcpu_thread = rr_start_vcpu_thread;
    108        ops->kick_vcpu_thread = rr_kick_vcpu_thread;
    109        ops->handle_interrupt = tcg_handle_interrupt;
    110    }
    111}
    112
    113static void tcg_accel_ops_class_init(ObjectClass *oc, void *data)
    114{
    115    AccelOpsClass *ops = ACCEL_OPS_CLASS(oc);
    116
    117    ops->ops_init = tcg_accel_ops_init;
    118}
    119
    120static const TypeInfo tcg_accel_ops_type = {
    121    .name = ACCEL_OPS_NAME("tcg"),
    122
    123    .parent = TYPE_ACCEL_OPS,
    124    .class_init = tcg_accel_ops_class_init,
    125    .abstract = true,
    126};
    127module_obj(ACCEL_OPS_NAME("tcg"));
    128
    129static void tcg_accel_ops_register_types(void)
    130{
    131    type_register_static(&tcg_accel_ops_type);
    132}
    133type_init(tcg_accel_ops_register_types);