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

hvf-cpu.c (2337B)

      1/*
      2 * x86 HVF CPU type initialization
      3 *
      4 * Copyright 2021 SUSE LLC
      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#include "qemu/osdep.h"
     11#include "cpu.h"
     12#include "host-cpu.h"
     13#include "qapi/error.h"
     14#include "sysemu/sysemu.h"
     15#include "hw/boards.h"
     16#include "sysemu/hvf.h"
     17#include "hw/core/accel-cpu.h"
     18
     19static void hvf_cpu_max_instance_init(X86CPU *cpu)
     20{
     21    CPUX86State *env = &cpu->env;
     22
     23    host_cpu_max_instance_init(cpu);
     24
     25    env->cpuid_min_level =
     26        hvf_get_supported_cpuid(0x0, 0, R_EAX);
     27    env->cpuid_min_xlevel =
     28        hvf_get_supported_cpuid(0x80000000, 0, R_EAX);
     29    env->cpuid_min_xlevel2 =
     30        hvf_get_supported_cpuid(0xC0000000, 0, R_EAX);
     31}
     32
     33static void hvf_cpu_xsave_init(void)
     34{
     35    static bool first = true;
     36    int i;
     37
     38    if (!first) {
     39        return;
     40    }
     41    first = false;
     42
     43    /* x87 and SSE states are in the legacy region of the XSAVE area. */
     44    x86_ext_save_areas[XSTATE_FP_BIT].offset = 0;
     45    x86_ext_save_areas[XSTATE_SSE_BIT].offset = 0;
     46
     47    for (i = XSTATE_SSE_BIT + 1; i < XSAVE_STATE_AREA_COUNT; i++) {
     48        ExtSaveArea *esa = &x86_ext_save_areas[i];
     49
     50        if (esa->size) {
     51            int sz = hvf_get_supported_cpuid(0xd, i, R_EAX);
     52            if (sz != 0) {
     53                assert(esa->size == sz);
     54                esa->offset = hvf_get_supported_cpuid(0xd, i, R_EBX);
     55            }
     56        }
     57    }
     58}
     59
     60static void hvf_cpu_instance_init(CPUState *cs)
     61{
     62    X86CPU *cpu = X86_CPU(cs);
     63
     64    host_cpu_instance_init(cpu);
     65
     66    /* Special cases not set in the X86CPUDefinition structs: */
     67    /* TODO: in-kernel irqchip for hvf */
     68
     69    if (cpu->max_features) {
     70        hvf_cpu_max_instance_init(cpu);
     71    }
     72
     73    hvf_cpu_xsave_init();
     74}
     75
     76static void hvf_cpu_accel_class_init(ObjectClass *oc, void *data)
     77{
     78    AccelCPUClass *acc = ACCEL_CPU_CLASS(oc);
     79
     80    acc->cpu_realizefn = host_cpu_realizefn;
     81    acc->cpu_instance_init = hvf_cpu_instance_init;
     82}
     83
     84static const TypeInfo hvf_cpu_accel_type_info = {
     85    .name = ACCEL_CPU_NAME("hvf"),
     86
     87    .parent = TYPE_ACCEL_CPU,
     88    .class_init = hvf_cpu_accel_class_init,
     89    .abstract = true,
     90};
     91
     92static void hvf_cpu_accel_register_types(void)
     93{
     94    type_register_static(&hvf_cpu_accel_type_info);
     95}
     96
     97type_init(hvf_cpu_accel_register_types);