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

control-vcpu.h (1869B)

      1/*
      2 * Interface for configuring and controlling the state of tracing events.
      3 *
      4 * Copyright (C) 2011-2016 Lluís Vilanova <vilanova@ac.upc.edu>
      5 *
      6 * This work is licensed under the terms of the GNU GPL, version 2 or later.
      7 * See the COPYING file in the top-level directory.
      8 */
      9
     10#ifndef TRACE__CONTROL_VCPU_H
     11#define TRACE__CONTROL_VCPU_H
     12
     13#include "control.h"
     14#include "event-internal.h"
     15#include "hw/core/cpu.h"
     16
     17/**
     18 * trace_event_get_vcpu_state:
     19 * @vcpu: Target vCPU.
     20 * @id: Event identifier name.
     21 *
     22 * Get the tracing state of an event (both static and dynamic) for the given
     23 * vCPU.
     24 *
     25 * If the event has the disabled property, the check will have no performance
     26 * impact.
     27 */
     28#define trace_event_get_vcpu_state(vcpu, id)                            \
     29    ((id ##_ENABLED) &&                                                 \
     30     trace_event_get_vcpu_state_dynamic_by_vcpu_id(                     \
     31         vcpu, _ ## id ## _EVENT.vcpu_id))
     32
     33/**
     34 * trace_event_get_vcpu_state_dynamic:
     35 *
     36 * Get the dynamic tracing state of an event for the given vCPU.
     37 */
     38static bool trace_event_get_vcpu_state_dynamic(CPUState *vcpu, TraceEvent *ev);
     39
     40#include "control-internal.h"
     41
     42static inline bool
     43trace_event_get_vcpu_state_dynamic_by_vcpu_id(CPUState *vcpu,
     44                                              uint32_t vcpu_id)
     45{
     46    /* it's on fast path, avoid consistency checks (asserts) */
     47    if (unlikely(trace_events_enabled_count)) {
     48        return test_bit(vcpu_id, vcpu->trace_dstate);
     49    } else {
     50        return false;
     51    }
     52}
     53
     54static inline bool trace_event_get_vcpu_state_dynamic(CPUState *vcpu,
     55                                                      TraceEvent *ev)
     56{
     57    uint32_t vcpu_id;
     58    assert(trace_event_is_vcpu(ev));
     59    vcpu_id = trace_event_get_vcpu_id(ev);
     60    return trace_event_get_vcpu_state_dynamic_by_vcpu_id(vcpu, vcpu_id);
     61}
     62
     63#endif