This patch simply replaces the separate boolean field in CPUState that kvm, hax (and upcoming hvf) have for keeping track of vcpu dirtiness with a single shared field. Signed-off-by: Sergio Andres Gomez Del Real <Sergio.G.DelReal@gmail.com> Message-Id: <20170618191101.3457-1-Sergio.G.DelReal@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1167 lines
30 KiB
C
1167 lines
30 KiB
C
/*
|
|
* QEMU HAX support
|
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*
|
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* Copyright IBM, Corp. 2008
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* Red Hat, Inc. 2008
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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* Glauber Costa <gcosta@redhat.com>
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*
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* Copyright (c) 2011 Intel Corporation
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* Written by:
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* Jiang Yunhong<yunhong.jiang@intel.com>
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* Xin Xiaohui<xiaohui.xin@intel.com>
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* Zhang Xiantao<xiantao.zhang@intel.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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|
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/*
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* HAX common code for both windows and darwin
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*/
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|
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#include "qemu/osdep.h"
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#include "cpu.h"
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#include "exec/address-spaces.h"
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#include "exec/exec-all.h"
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#include "exec/ioport.h"
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#include "qemu-common.h"
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#include "strings.h"
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#include "hax-i386.h"
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#include "sysemu/accel.h"
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#include "sysemu/sysemu.h"
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#include "qemu/main-loop.h"
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#include "hw/boards.h"
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#define DEBUG_HAX 0
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#define DPRINTF(fmt, ...) \
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do { \
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if (DEBUG_HAX) { \
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fprintf(stdout, fmt, ## __VA_ARGS__); \
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} \
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} while (0)
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/* Current version */
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const uint32_t hax_cur_version = 0x4; /* API v4: unmapping and MMIO moves */
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/* Minimum HAX kernel version */
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const uint32_t hax_min_version = 0x4; /* API v4: supports unmapping */
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static bool hax_allowed;
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struct hax_state hax_global;
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static void hax_vcpu_sync_state(CPUArchState *env, int modified);
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static int hax_arch_get_registers(CPUArchState *env);
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int hax_enabled(void)
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{
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return hax_allowed;
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}
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int valid_hax_tunnel_size(uint16_t size)
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{
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return size >= sizeof(struct hax_tunnel);
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}
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hax_fd hax_vcpu_get_fd(CPUArchState *env)
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{
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struct hax_vcpu_state *vcpu = ENV_GET_CPU(env)->hax_vcpu;
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if (!vcpu) {
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return HAX_INVALID_FD;
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}
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return vcpu->fd;
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}
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static int hax_get_capability(struct hax_state *hax)
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{
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int ret;
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struct hax_capabilityinfo capinfo, *cap = &capinfo;
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ret = hax_capability(hax, cap);
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if (ret) {
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return ret;
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}
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if ((cap->wstatus & HAX_CAP_WORKSTATUS_MASK) == HAX_CAP_STATUS_NOTWORKING) {
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if (cap->winfo & HAX_CAP_FAILREASON_VT) {
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DPRINTF
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("VTX feature is not enabled, HAX driver will not work.\n");
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} else if (cap->winfo & HAX_CAP_FAILREASON_NX) {
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DPRINTF
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("NX feature is not enabled, HAX driver will not work.\n");
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}
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return -ENXIO;
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}
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if (!(cap->winfo & HAX_CAP_UG)) {
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fprintf(stderr, "UG mode is not supported by the hardware.\n");
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return -ENOTSUP;
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}
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if (cap->wstatus & HAX_CAP_MEMQUOTA) {
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if (cap->mem_quota < hax->mem_quota) {
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fprintf(stderr, "The VM memory needed exceeds the driver limit.\n");
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return -ENOSPC;
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}
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}
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return 0;
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}
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static int hax_version_support(struct hax_state *hax)
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{
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int ret;
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struct hax_module_version version;
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ret = hax_mod_version(hax, &version);
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if (ret < 0) {
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return 0;
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}
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if (hax_min_version > version.cur_version) {
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fprintf(stderr, "Incompatible HAX module version %d,",
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version.cur_version);
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fprintf(stderr, "requires minimum version %d\n", hax_min_version);
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return 0;
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}
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if (hax_cur_version < version.compat_version) {
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fprintf(stderr, "Incompatible QEMU HAX API version %x,",
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hax_cur_version);
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fprintf(stderr, "requires minimum HAX API version %x\n",
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version.compat_version);
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return 0;
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}
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return 1;
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}
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int hax_vcpu_create(int id)
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{
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struct hax_vcpu_state *vcpu = NULL;
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int ret;
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if (!hax_global.vm) {
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fprintf(stderr, "vcpu %x created failed, vm is null\n", id);
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return -1;
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}
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if (hax_global.vm->vcpus[id]) {
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fprintf(stderr, "vcpu %x allocated already\n", id);
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return 0;
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}
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vcpu = g_malloc(sizeof(struct hax_vcpu_state));
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if (!vcpu) {
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fprintf(stderr, "Failed to alloc vcpu state\n");
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return -ENOMEM;
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}
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memset(vcpu, 0, sizeof(struct hax_vcpu_state));
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ret = hax_host_create_vcpu(hax_global.vm->fd, id);
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if (ret) {
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fprintf(stderr, "Failed to create vcpu %x\n", id);
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goto error;
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}
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vcpu->vcpu_id = id;
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vcpu->fd = hax_host_open_vcpu(hax_global.vm->id, id);
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if (hax_invalid_fd(vcpu->fd)) {
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fprintf(stderr, "Failed to open the vcpu\n");
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ret = -ENODEV;
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goto error;
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}
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hax_global.vm->vcpus[id] = vcpu;
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ret = hax_host_setup_vcpu_channel(vcpu);
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if (ret) {
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fprintf(stderr, "Invalid hax tunnel size\n");
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ret = -EINVAL;
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goto error;
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}
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return 0;
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error:
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/* vcpu and tunnel will be closed automatically */
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if (vcpu && !hax_invalid_fd(vcpu->fd)) {
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hax_close_fd(vcpu->fd);
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}
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hax_global.vm->vcpus[id] = NULL;
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g_free(vcpu);
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return -1;
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}
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int hax_vcpu_destroy(CPUState *cpu)
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{
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struct hax_vcpu_state *vcpu = cpu->hax_vcpu;
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if (!hax_global.vm) {
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fprintf(stderr, "vcpu %x destroy failed, vm is null\n", vcpu->vcpu_id);
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return -1;
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}
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if (!vcpu) {
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return 0;
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}
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/*
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* 1. The hax_tunnel is also destroied when vcpu destroy
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* 2. close fd will cause hax module vcpu be cleaned
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*/
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hax_close_fd(vcpu->fd);
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hax_global.vm->vcpus[vcpu->vcpu_id] = NULL;
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g_free(vcpu);
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return 0;
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}
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int hax_init_vcpu(CPUState *cpu)
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{
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int ret;
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ret = hax_vcpu_create(cpu->cpu_index);
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if (ret < 0) {
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fprintf(stderr, "Failed to create HAX vcpu\n");
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exit(-1);
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}
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cpu->hax_vcpu = hax_global.vm->vcpus[cpu->cpu_index];
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cpu->vcpu_dirty = true;
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qemu_register_reset(hax_reset_vcpu_state, (CPUArchState *) (cpu->env_ptr));
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return ret;
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}
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struct hax_vm *hax_vm_create(struct hax_state *hax)
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{
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struct hax_vm *vm;
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int vm_id = 0, ret;
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if (hax_invalid_fd(hax->fd)) {
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return NULL;
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}
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if (hax->vm) {
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return hax->vm;
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}
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vm = g_malloc(sizeof(struct hax_vm));
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if (!vm) {
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return NULL;
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}
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memset(vm, 0, sizeof(struct hax_vm));
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ret = hax_host_create_vm(hax, &vm_id);
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if (ret) {
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fprintf(stderr, "Failed to create vm %x\n", ret);
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goto error;
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}
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vm->id = vm_id;
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vm->fd = hax_host_open_vm(hax, vm_id);
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if (hax_invalid_fd(vm->fd)) {
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fprintf(stderr, "Failed to open vm %d\n", vm_id);
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goto error;
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}
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hax->vm = vm;
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return vm;
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error:
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g_free(vm);
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hax->vm = NULL;
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return NULL;
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}
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int hax_vm_destroy(struct hax_vm *vm)
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{
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int i;
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for (i = 0; i < HAX_MAX_VCPU; i++)
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if (vm->vcpus[i]) {
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fprintf(stderr, "VCPU should be cleaned before vm clean\n");
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return -1;
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}
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hax_close_fd(vm->fd);
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g_free(vm);
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hax_global.vm = NULL;
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return 0;
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}
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static void hax_handle_interrupt(CPUState *cpu, int mask)
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{
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cpu->interrupt_request |= mask;
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if (!qemu_cpu_is_self(cpu)) {
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qemu_cpu_kick(cpu);
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}
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}
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static int hax_init(ram_addr_t ram_size)
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{
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struct hax_state *hax = NULL;
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struct hax_qemu_version qversion;
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int ret;
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hax = &hax_global;
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memset(hax, 0, sizeof(struct hax_state));
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hax->mem_quota = ram_size;
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hax->fd = hax_mod_open();
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if (hax_invalid_fd(hax->fd)) {
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hax->fd = 0;
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ret = -ENODEV;
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goto error;
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}
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ret = hax_get_capability(hax);
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if (ret) {
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if (ret != -ENOSPC) {
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ret = -EINVAL;
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}
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goto error;
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}
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if (!hax_version_support(hax)) {
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ret = -EINVAL;
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goto error;
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}
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hax->vm = hax_vm_create(hax);
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if (!hax->vm) {
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fprintf(stderr, "Failed to create HAX VM\n");
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ret = -EINVAL;
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goto error;
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}
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|
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hax_memory_init();
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|
|
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qversion.cur_version = hax_cur_version;
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qversion.min_version = hax_min_version;
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hax_notify_qemu_version(hax->vm->fd, &qversion);
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cpu_interrupt_handler = hax_handle_interrupt;
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return ret;
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error:
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if (hax->vm) {
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hax_vm_destroy(hax->vm);
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}
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if (hax->fd) {
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hax_mod_close(hax);
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}
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return ret;
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}
|
|
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static int hax_accel_init(MachineState *ms)
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{
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int ret = hax_init(ms->ram_size);
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|
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if (ret && (ret != -ENOSPC)) {
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fprintf(stderr, "No accelerator found.\n");
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} else {
|
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fprintf(stdout, "HAX is %s and emulator runs in %s mode.\n",
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!ret ? "working" : "not working",
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!ret ? "fast virt" : "emulation");
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}
|
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return ret;
|
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}
|
|
|
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static int hax_handle_fastmmio(CPUArchState *env, struct hax_fastmmio *hft)
|
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{
|
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if (hft->direction < 2) {
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cpu_physical_memory_rw(hft->gpa, (uint8_t *) &hft->value, hft->size,
|
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hft->direction);
|
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} else {
|
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/*
|
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* HAX API v4 supports transferring data between two MMIO addresses,
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* hft->gpa and hft->gpa2 (instructions such as MOVS require this):
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* hft->direction == 2: gpa ==> gpa2
|
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*/
|
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uint64_t value;
|
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cpu_physical_memory_rw(hft->gpa, (uint8_t *) &value, hft->size, 0);
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cpu_physical_memory_rw(hft->gpa2, (uint8_t *) &value, hft->size, 1);
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}
|
|
|
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return 0;
|
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}
|
|
|
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static int hax_handle_io(CPUArchState *env, uint32_t df, uint16_t port,
|
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int direction, int size, int count, void *buffer)
|
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{
|
|
uint8_t *ptr;
|
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int i;
|
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MemTxAttrs attrs = { 0 };
|
|
|
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if (!df) {
|
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ptr = (uint8_t *) buffer;
|
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} else {
|
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ptr = buffer + size * count - size;
|
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}
|
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for (i = 0; i < count; i++) {
|
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address_space_rw(&address_space_io, port, attrs,
|
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ptr, size, direction == HAX_EXIT_IO_OUT);
|
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if (!df) {
|
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ptr += size;
|
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} else {
|
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ptr -= size;
|
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}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hax_vcpu_interrupt(CPUArchState *env)
|
|
{
|
|
CPUState *cpu = ENV_GET_CPU(env);
|
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struct hax_vcpu_state *vcpu = cpu->hax_vcpu;
|
|
struct hax_tunnel *ht = vcpu->tunnel;
|
|
|
|
/*
|
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* Try to inject an interrupt if the guest can accept it
|
|
* Unlike KVM, HAX kernel check for the eflags, instead of qemu
|
|
*/
|
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if (ht->ready_for_interrupt_injection &&
|
|
(cpu->interrupt_request & CPU_INTERRUPT_HARD)) {
|
|
int irq;
|
|
|
|
irq = cpu_get_pic_interrupt(env);
|
|
if (irq >= 0) {
|
|
hax_inject_interrupt(env, irq);
|
|
cpu->interrupt_request &= ~CPU_INTERRUPT_HARD;
|
|
}
|
|
}
|
|
|
|
/* If we have an interrupt but the guest is not ready to receive an
|
|
* interrupt, request an interrupt window exit. This will
|
|
* cause a return to userspace as soon as the guest is ready to
|
|
* receive interrupts. */
|
|
if ((cpu->interrupt_request & CPU_INTERRUPT_HARD)) {
|
|
ht->request_interrupt_window = 1;
|
|
} else {
|
|
ht->request_interrupt_window = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void hax_raise_event(CPUState *cpu)
|
|
{
|
|
struct hax_vcpu_state *vcpu = cpu->hax_vcpu;
|
|
|
|
if (!vcpu) {
|
|
return;
|
|
}
|
|
vcpu->tunnel->user_event_pending = 1;
|
|
}
|
|
|
|
/*
|
|
* Ask hax kernel module to run the CPU for us till:
|
|
* 1. Guest crash or shutdown
|
|
* 2. Need QEMU's emulation like guest execute MMIO instruction
|
|
* 3. Guest execute HLT
|
|
* 4. QEMU have Signal/event pending
|
|
* 5. An unknown VMX exit happens
|
|
*/
|
|
static int hax_vcpu_hax_exec(CPUArchState *env)
|
|
{
|
|
int ret = 0;
|
|
CPUState *cpu = ENV_GET_CPU(env);
|
|
X86CPU *x86_cpu = X86_CPU(cpu);
|
|
struct hax_vcpu_state *vcpu = cpu->hax_vcpu;
|
|
struct hax_tunnel *ht = vcpu->tunnel;
|
|
|
|
if (!hax_enabled()) {
|
|
DPRINTF("Trying to vcpu execute at eip:" TARGET_FMT_lx "\n", env->eip);
|
|
return 0;
|
|
}
|
|
|
|
cpu->halted = 0;
|
|
|
|
if (cpu->interrupt_request & CPU_INTERRUPT_POLL) {
|
|
cpu->interrupt_request &= ~CPU_INTERRUPT_POLL;
|
|
apic_poll_irq(x86_cpu->apic_state);
|
|
}
|
|
|
|
if (cpu->interrupt_request & CPU_INTERRUPT_INIT) {
|
|
DPRINTF("\nhax_vcpu_hax_exec: handling INIT for %d\n",
|
|
cpu->cpu_index);
|
|
do_cpu_init(x86_cpu);
|
|
hax_vcpu_sync_state(env, 1);
|
|
}
|
|
|
|
if (cpu->interrupt_request & CPU_INTERRUPT_SIPI) {
|
|
DPRINTF("hax_vcpu_hax_exec: handling SIPI for %d\n",
|
|
cpu->cpu_index);
|
|
hax_vcpu_sync_state(env, 0);
|
|
do_cpu_sipi(x86_cpu);
|
|
hax_vcpu_sync_state(env, 1);
|
|
}
|
|
|
|
do {
|
|
int hax_ret;
|
|
|
|
if (cpu->exit_request) {
|
|
ret = 1;
|
|
break;
|
|
}
|
|
|
|
hax_vcpu_interrupt(env);
|
|
|
|
qemu_mutex_unlock_iothread();
|
|
cpu_exec_start(cpu);
|
|
hax_ret = hax_vcpu_run(vcpu);
|
|
cpu_exec_end(cpu);
|
|
qemu_mutex_lock_iothread();
|
|
|
|
/* Simply continue the vcpu_run if system call interrupted */
|
|
if (hax_ret == -EINTR || hax_ret == -EAGAIN) {
|
|
DPRINTF("io window interrupted\n");
|
|
continue;
|
|
}
|
|
|
|
if (hax_ret < 0) {
|
|
fprintf(stderr, "vcpu run failed for vcpu %x\n", vcpu->vcpu_id);
|
|
abort();
|
|
}
|
|
switch (ht->_exit_status) {
|
|
case HAX_EXIT_IO:
|
|
ret = hax_handle_io(env, ht->pio._df, ht->pio._port,
|
|
ht->pio._direction,
|
|
ht->pio._size, ht->pio._count, vcpu->iobuf);
|
|
break;
|
|
case HAX_EXIT_FAST_MMIO:
|
|
ret = hax_handle_fastmmio(env, (struct hax_fastmmio *) vcpu->iobuf);
|
|
break;
|
|
/* Guest state changed, currently only for shutdown */
|
|
case HAX_EXIT_STATECHANGE:
|
|
fprintf(stdout, "VCPU shutdown request\n");
|
|
qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
|
|
hax_vcpu_sync_state(env, 0);
|
|
ret = 1;
|
|
break;
|
|
case HAX_EXIT_UNKNOWN_VMEXIT:
|
|
fprintf(stderr, "Unknown VMX exit %x from guest\n",
|
|
ht->_exit_reason);
|
|
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
|
|
hax_vcpu_sync_state(env, 0);
|
|
cpu_dump_state(cpu, stderr, fprintf, 0);
|
|
ret = -1;
|
|
break;
|
|
case HAX_EXIT_HLT:
|
|
if (!(cpu->interrupt_request & CPU_INTERRUPT_HARD) &&
|
|
!(cpu->interrupt_request & CPU_INTERRUPT_NMI)) {
|
|
/* hlt instruction with interrupt disabled is shutdown */
|
|
env->eflags |= IF_MASK;
|
|
cpu->halted = 1;
|
|
cpu->exception_index = EXCP_HLT;
|
|
ret = 1;
|
|
}
|
|
break;
|
|
/* these situations will continue to hax module */
|
|
case HAX_EXIT_INTERRUPT:
|
|
case HAX_EXIT_PAUSED:
|
|
break;
|
|
case HAX_EXIT_MMIO:
|
|
/* Should not happen on UG system */
|
|
fprintf(stderr, "HAX: unsupported MMIO emulation\n");
|
|
ret = -1;
|
|
break;
|
|
case HAX_EXIT_REAL:
|
|
/* Should not happen on UG system */
|
|
fprintf(stderr, "HAX: unimplemented real mode emulation\n");
|
|
ret = -1;
|
|
break;
|
|
default:
|
|
fprintf(stderr, "Unknown exit %x from HAX\n", ht->_exit_status);
|
|
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
|
|
hax_vcpu_sync_state(env, 0);
|
|
cpu_dump_state(cpu, stderr, fprintf, 0);
|
|
ret = 1;
|
|
break;
|
|
}
|
|
} while (!ret);
|
|
|
|
if (cpu->exit_request) {
|
|
cpu->exit_request = 0;
|
|
cpu->exception_index = EXCP_INTERRUPT;
|
|
}
|
|
return ret < 0;
|
|
}
|
|
|
|
static void do_hax_cpu_synchronize_state(CPUState *cpu, run_on_cpu_data arg)
|
|
{
|
|
CPUArchState *env = cpu->env_ptr;
|
|
|
|
hax_arch_get_registers(env);
|
|
cpu->vcpu_dirty = true;
|
|
}
|
|
|
|
void hax_cpu_synchronize_state(CPUState *cpu)
|
|
{
|
|
if (!cpu->vcpu_dirty) {
|
|
run_on_cpu(cpu, do_hax_cpu_synchronize_state, RUN_ON_CPU_NULL);
|
|
}
|
|
}
|
|
|
|
static void do_hax_cpu_synchronize_post_reset(CPUState *cpu,
|
|
run_on_cpu_data arg)
|
|
{
|
|
CPUArchState *env = cpu->env_ptr;
|
|
|
|
hax_vcpu_sync_state(env, 1);
|
|
cpu->vcpu_dirty = false;
|
|
}
|
|
|
|
void hax_cpu_synchronize_post_reset(CPUState *cpu)
|
|
{
|
|
run_on_cpu(cpu, do_hax_cpu_synchronize_post_reset, RUN_ON_CPU_NULL);
|
|
}
|
|
|
|
static void do_hax_cpu_synchronize_post_init(CPUState *cpu, run_on_cpu_data arg)
|
|
{
|
|
CPUArchState *env = cpu->env_ptr;
|
|
|
|
hax_vcpu_sync_state(env, 1);
|
|
cpu->vcpu_dirty = false;
|
|
}
|
|
|
|
void hax_cpu_synchronize_post_init(CPUState *cpu)
|
|
{
|
|
run_on_cpu(cpu, do_hax_cpu_synchronize_post_init, RUN_ON_CPU_NULL);
|
|
}
|
|
|
|
static void do_hax_cpu_synchronize_pre_loadvm(CPUState *cpu, run_on_cpu_data arg)
|
|
{
|
|
cpu->vcpu_dirty = true;
|
|
}
|
|
|
|
void hax_cpu_synchronize_pre_loadvm(CPUState *cpu)
|
|
{
|
|
run_on_cpu(cpu, do_hax_cpu_synchronize_pre_loadvm, RUN_ON_CPU_NULL);
|
|
}
|
|
|
|
int hax_smp_cpu_exec(CPUState *cpu)
|
|
{
|
|
CPUArchState *env = (CPUArchState *) (cpu->env_ptr);
|
|
int fatal;
|
|
int ret;
|
|
|
|
while (1) {
|
|
if (cpu->exception_index >= EXCP_INTERRUPT) {
|
|
ret = cpu->exception_index;
|
|
cpu->exception_index = -1;
|
|
break;
|
|
}
|
|
|
|
fatal = hax_vcpu_hax_exec(env);
|
|
|
|
if (fatal) {
|
|
fprintf(stderr, "Unsupported HAX vcpu return\n");
|
|
abort();
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void set_v8086_seg(struct segment_desc_t *lhs, const SegmentCache *rhs)
|
|
{
|
|
memset(lhs, 0, sizeof(struct segment_desc_t));
|
|
lhs->selector = rhs->selector;
|
|
lhs->base = rhs->base;
|
|
lhs->limit = rhs->limit;
|
|
lhs->type = 3;
|
|
lhs->present = 1;
|
|
lhs->dpl = 3;
|
|
lhs->operand_size = 0;
|
|
lhs->desc = 1;
|
|
lhs->long_mode = 0;
|
|
lhs->granularity = 0;
|
|
lhs->available = 0;
|
|
}
|
|
|
|
static void get_seg(SegmentCache *lhs, const struct segment_desc_t *rhs)
|
|
{
|
|
lhs->selector = rhs->selector;
|
|
lhs->base = rhs->base;
|
|
lhs->limit = rhs->limit;
|
|
lhs->flags = (rhs->type << DESC_TYPE_SHIFT)
|
|
| (rhs->present * DESC_P_MASK)
|
|
| (rhs->dpl << DESC_DPL_SHIFT)
|
|
| (rhs->operand_size << DESC_B_SHIFT)
|
|
| (rhs->desc * DESC_S_MASK)
|
|
| (rhs->long_mode << DESC_L_SHIFT)
|
|
| (rhs->granularity * DESC_G_MASK) | (rhs->available * DESC_AVL_MASK);
|
|
}
|
|
|
|
static void set_seg(struct segment_desc_t *lhs, const SegmentCache *rhs)
|
|
{
|
|
unsigned flags = rhs->flags;
|
|
|
|
memset(lhs, 0, sizeof(struct segment_desc_t));
|
|
lhs->selector = rhs->selector;
|
|
lhs->base = rhs->base;
|
|
lhs->limit = rhs->limit;
|
|
lhs->type = (flags >> DESC_TYPE_SHIFT) & 15;
|
|
lhs->present = (flags & DESC_P_MASK) != 0;
|
|
lhs->dpl = rhs->selector & 3;
|
|
lhs->operand_size = (flags >> DESC_B_SHIFT) & 1;
|
|
lhs->desc = (flags & DESC_S_MASK) != 0;
|
|
lhs->long_mode = (flags >> DESC_L_SHIFT) & 1;
|
|
lhs->granularity = (flags & DESC_G_MASK) != 0;
|
|
lhs->available = (flags & DESC_AVL_MASK) != 0;
|
|
}
|
|
|
|
static void hax_getput_reg(uint64_t *hax_reg, target_ulong *qemu_reg, int set)
|
|
{
|
|
target_ulong reg = *hax_reg;
|
|
|
|
if (set) {
|
|
*hax_reg = *qemu_reg;
|
|
} else {
|
|
*qemu_reg = reg;
|
|
}
|
|
}
|
|
|
|
/* The sregs has been synced with HAX kernel already before this call */
|
|
static int hax_get_segments(CPUArchState *env, struct vcpu_state_t *sregs)
|
|
{
|
|
get_seg(&env->segs[R_CS], &sregs->_cs);
|
|
get_seg(&env->segs[R_DS], &sregs->_ds);
|
|
get_seg(&env->segs[R_ES], &sregs->_es);
|
|
get_seg(&env->segs[R_FS], &sregs->_fs);
|
|
get_seg(&env->segs[R_GS], &sregs->_gs);
|
|
get_seg(&env->segs[R_SS], &sregs->_ss);
|
|
|
|
get_seg(&env->tr, &sregs->_tr);
|
|
get_seg(&env->ldt, &sregs->_ldt);
|
|
env->idt.limit = sregs->_idt.limit;
|
|
env->idt.base = sregs->_idt.base;
|
|
env->gdt.limit = sregs->_gdt.limit;
|
|
env->gdt.base = sregs->_gdt.base;
|
|
return 0;
|
|
}
|
|
|
|
static int hax_set_segments(CPUArchState *env, struct vcpu_state_t *sregs)
|
|
{
|
|
if ((env->eflags & VM_MASK)) {
|
|
set_v8086_seg(&sregs->_cs, &env->segs[R_CS]);
|
|
set_v8086_seg(&sregs->_ds, &env->segs[R_DS]);
|
|
set_v8086_seg(&sregs->_es, &env->segs[R_ES]);
|
|
set_v8086_seg(&sregs->_fs, &env->segs[R_FS]);
|
|
set_v8086_seg(&sregs->_gs, &env->segs[R_GS]);
|
|
set_v8086_seg(&sregs->_ss, &env->segs[R_SS]);
|
|
} else {
|
|
set_seg(&sregs->_cs, &env->segs[R_CS]);
|
|
set_seg(&sregs->_ds, &env->segs[R_DS]);
|
|
set_seg(&sregs->_es, &env->segs[R_ES]);
|
|
set_seg(&sregs->_fs, &env->segs[R_FS]);
|
|
set_seg(&sregs->_gs, &env->segs[R_GS]);
|
|
set_seg(&sregs->_ss, &env->segs[R_SS]);
|
|
|
|
if (env->cr[0] & CR0_PE_MASK) {
|
|
/* force ss cpl to cs cpl */
|
|
sregs->_ss.selector = (sregs->_ss.selector & ~3) |
|
|
(sregs->_cs.selector & 3);
|
|
sregs->_ss.dpl = sregs->_ss.selector & 3;
|
|
}
|
|
}
|
|
|
|
set_seg(&sregs->_tr, &env->tr);
|
|
set_seg(&sregs->_ldt, &env->ldt);
|
|
sregs->_idt.limit = env->idt.limit;
|
|
sregs->_idt.base = env->idt.base;
|
|
sregs->_gdt.limit = env->gdt.limit;
|
|
sregs->_gdt.base = env->gdt.base;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* After get the state from the kernel module, some
|
|
* qemu emulator state need be updated also
|
|
*/
|
|
static int hax_setup_qemu_emulator(CPUArchState *env)
|
|
{
|
|
|
|
#define HFLAG_COPY_MASK (~( \
|
|
HF_CPL_MASK | HF_PE_MASK | HF_MP_MASK | HF_EM_MASK | \
|
|
HF_TS_MASK | HF_TF_MASK | HF_VM_MASK | HF_IOPL_MASK | \
|
|
HF_OSFXSR_MASK | HF_LMA_MASK | HF_CS32_MASK | \
|
|
HF_SS32_MASK | HF_CS64_MASK | HF_ADDSEG_MASK))
|
|
|
|
uint32_t hflags;
|
|
|
|
hflags = (env->segs[R_CS].flags >> DESC_DPL_SHIFT) & HF_CPL_MASK;
|
|
hflags |= (env->cr[0] & CR0_PE_MASK) << (HF_PE_SHIFT - CR0_PE_SHIFT);
|
|
hflags |= (env->cr[0] << (HF_MP_SHIFT - CR0_MP_SHIFT)) &
|
|
(HF_MP_MASK | HF_EM_MASK | HF_TS_MASK);
|
|
hflags |= (env->eflags & (HF_TF_MASK | HF_VM_MASK | HF_IOPL_MASK));
|
|
hflags |= (env->cr[4] & CR4_OSFXSR_MASK) <<
|
|
(HF_OSFXSR_SHIFT - CR4_OSFXSR_SHIFT);
|
|
|
|
if (env->efer & MSR_EFER_LMA) {
|
|
hflags |= HF_LMA_MASK;
|
|
}
|
|
|
|
if ((hflags & HF_LMA_MASK) && (env->segs[R_CS].flags & DESC_L_MASK)) {
|
|
hflags |= HF_CS32_MASK | HF_SS32_MASK | HF_CS64_MASK;
|
|
} else {
|
|
hflags |= (env->segs[R_CS].flags & DESC_B_MASK) >>
|
|
(DESC_B_SHIFT - HF_CS32_SHIFT);
|
|
hflags |= (env->segs[R_SS].flags & DESC_B_MASK) >>
|
|
(DESC_B_SHIFT - HF_SS32_SHIFT);
|
|
if (!(env->cr[0] & CR0_PE_MASK) ||
|
|
(env->eflags & VM_MASK) || !(hflags & HF_CS32_MASK)) {
|
|
hflags |= HF_ADDSEG_MASK;
|
|
} else {
|
|
hflags |= ((env->segs[R_DS].base |
|
|
env->segs[R_ES].base |
|
|
env->segs[R_SS].base) != 0) << HF_ADDSEG_SHIFT;
|
|
}
|
|
}
|
|
|
|
hflags &= ~HF_SMM_MASK;
|
|
|
|
env->hflags = (env->hflags & HFLAG_COPY_MASK) | hflags;
|
|
return 0;
|
|
}
|
|
|
|
static int hax_sync_vcpu_register(CPUArchState *env, int set)
|
|
{
|
|
struct vcpu_state_t regs;
|
|
int ret;
|
|
memset(®s, 0, sizeof(struct vcpu_state_t));
|
|
|
|
if (!set) {
|
|
ret = hax_sync_vcpu_state(env, ®s, 0);
|
|
if (ret < 0) {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/* generic register */
|
|
hax_getput_reg(®s._rax, &env->regs[R_EAX], set);
|
|
hax_getput_reg(®s._rbx, &env->regs[R_EBX], set);
|
|
hax_getput_reg(®s._rcx, &env->regs[R_ECX], set);
|
|
hax_getput_reg(®s._rdx, &env->regs[R_EDX], set);
|
|
hax_getput_reg(®s._rsi, &env->regs[R_ESI], set);
|
|
hax_getput_reg(®s._rdi, &env->regs[R_EDI], set);
|
|
hax_getput_reg(®s._rsp, &env->regs[R_ESP], set);
|
|
hax_getput_reg(®s._rbp, &env->regs[R_EBP], set);
|
|
#ifdef TARGET_X86_64
|
|
hax_getput_reg(®s._r8, &env->regs[8], set);
|
|
hax_getput_reg(®s._r9, &env->regs[9], set);
|
|
hax_getput_reg(®s._r10, &env->regs[10], set);
|
|
hax_getput_reg(®s._r11, &env->regs[11], set);
|
|
hax_getput_reg(®s._r12, &env->regs[12], set);
|
|
hax_getput_reg(®s._r13, &env->regs[13], set);
|
|
hax_getput_reg(®s._r14, &env->regs[14], set);
|
|
hax_getput_reg(®s._r15, &env->regs[15], set);
|
|
#endif
|
|
hax_getput_reg(®s._rflags, &env->eflags, set);
|
|
hax_getput_reg(®s._rip, &env->eip, set);
|
|
|
|
if (set) {
|
|
regs._cr0 = env->cr[0];
|
|
regs._cr2 = env->cr[2];
|
|
regs._cr3 = env->cr[3];
|
|
regs._cr4 = env->cr[4];
|
|
hax_set_segments(env, ®s);
|
|
} else {
|
|
env->cr[0] = regs._cr0;
|
|
env->cr[2] = regs._cr2;
|
|
env->cr[3] = regs._cr3;
|
|
env->cr[4] = regs._cr4;
|
|
hax_get_segments(env, ®s);
|
|
}
|
|
|
|
if (set) {
|
|
ret = hax_sync_vcpu_state(env, ®s, 1);
|
|
if (ret < 0) {
|
|
return -1;
|
|
}
|
|
}
|
|
if (!set) {
|
|
hax_setup_qemu_emulator(env);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void hax_msr_entry_set(struct vmx_msr *item, uint32_t index,
|
|
uint64_t value)
|
|
{
|
|
item->entry = index;
|
|
item->value = value;
|
|
}
|
|
|
|
static int hax_get_msrs(CPUArchState *env)
|
|
{
|
|
struct hax_msr_data md;
|
|
struct vmx_msr *msrs = md.entries;
|
|
int ret, i, n;
|
|
|
|
n = 0;
|
|
msrs[n++].entry = MSR_IA32_SYSENTER_CS;
|
|
msrs[n++].entry = MSR_IA32_SYSENTER_ESP;
|
|
msrs[n++].entry = MSR_IA32_SYSENTER_EIP;
|
|
msrs[n++].entry = MSR_IA32_TSC;
|
|
#ifdef TARGET_X86_64
|
|
msrs[n++].entry = MSR_EFER;
|
|
msrs[n++].entry = MSR_STAR;
|
|
msrs[n++].entry = MSR_LSTAR;
|
|
msrs[n++].entry = MSR_CSTAR;
|
|
msrs[n++].entry = MSR_FMASK;
|
|
msrs[n++].entry = MSR_KERNELGSBASE;
|
|
#endif
|
|
md.nr_msr = n;
|
|
ret = hax_sync_msr(env, &md, 0);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
for (i = 0; i < md.done; i++) {
|
|
switch (msrs[i].entry) {
|
|
case MSR_IA32_SYSENTER_CS:
|
|
env->sysenter_cs = msrs[i].value;
|
|
break;
|
|
case MSR_IA32_SYSENTER_ESP:
|
|
env->sysenter_esp = msrs[i].value;
|
|
break;
|
|
case MSR_IA32_SYSENTER_EIP:
|
|
env->sysenter_eip = msrs[i].value;
|
|
break;
|
|
case MSR_IA32_TSC:
|
|
env->tsc = msrs[i].value;
|
|
break;
|
|
#ifdef TARGET_X86_64
|
|
case MSR_EFER:
|
|
env->efer = msrs[i].value;
|
|
break;
|
|
case MSR_STAR:
|
|
env->star = msrs[i].value;
|
|
break;
|
|
case MSR_LSTAR:
|
|
env->lstar = msrs[i].value;
|
|
break;
|
|
case MSR_CSTAR:
|
|
env->cstar = msrs[i].value;
|
|
break;
|
|
case MSR_FMASK:
|
|
env->fmask = msrs[i].value;
|
|
break;
|
|
case MSR_KERNELGSBASE:
|
|
env->kernelgsbase = msrs[i].value;
|
|
break;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hax_set_msrs(CPUArchState *env)
|
|
{
|
|
struct hax_msr_data md;
|
|
struct vmx_msr *msrs;
|
|
msrs = md.entries;
|
|
int n = 0;
|
|
|
|
memset(&md, 0, sizeof(struct hax_msr_data));
|
|
hax_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_CS, env->sysenter_cs);
|
|
hax_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_ESP, env->sysenter_esp);
|
|
hax_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_EIP, env->sysenter_eip);
|
|
hax_msr_entry_set(&msrs[n++], MSR_IA32_TSC, env->tsc);
|
|
#ifdef TARGET_X86_64
|
|
hax_msr_entry_set(&msrs[n++], MSR_EFER, env->efer);
|
|
hax_msr_entry_set(&msrs[n++], MSR_STAR, env->star);
|
|
hax_msr_entry_set(&msrs[n++], MSR_LSTAR, env->lstar);
|
|
hax_msr_entry_set(&msrs[n++], MSR_CSTAR, env->cstar);
|
|
hax_msr_entry_set(&msrs[n++], MSR_FMASK, env->fmask);
|
|
hax_msr_entry_set(&msrs[n++], MSR_KERNELGSBASE, env->kernelgsbase);
|
|
#endif
|
|
md.nr_msr = n;
|
|
md.done = 0;
|
|
|
|
return hax_sync_msr(env, &md, 1);
|
|
}
|
|
|
|
static int hax_get_fpu(CPUArchState *env)
|
|
{
|
|
struct fx_layout fpu;
|
|
int i, ret;
|
|
|
|
ret = hax_sync_fpu(env, &fpu, 0);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
env->fpstt = (fpu.fsw >> 11) & 7;
|
|
env->fpus = fpu.fsw;
|
|
env->fpuc = fpu.fcw;
|
|
for (i = 0; i < 8; ++i) {
|
|
env->fptags[i] = !((fpu.ftw >> i) & 1);
|
|
}
|
|
memcpy(env->fpregs, fpu.st_mm, sizeof(env->fpregs));
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
env->xmm_regs[i].ZMM_Q(0) = ldq_p(&fpu.mmx_1[i][0]);
|
|
env->xmm_regs[i].ZMM_Q(1) = ldq_p(&fpu.mmx_1[i][8]);
|
|
if (CPU_NB_REGS > 8) {
|
|
env->xmm_regs[i + 8].ZMM_Q(0) = ldq_p(&fpu.mmx_2[i][0]);
|
|
env->xmm_regs[i + 8].ZMM_Q(1) = ldq_p(&fpu.mmx_2[i][8]);
|
|
}
|
|
}
|
|
env->mxcsr = fpu.mxcsr;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hax_set_fpu(CPUArchState *env)
|
|
{
|
|
struct fx_layout fpu;
|
|
int i;
|
|
|
|
memset(&fpu, 0, sizeof(fpu));
|
|
fpu.fsw = env->fpus & ~(7 << 11);
|
|
fpu.fsw |= (env->fpstt & 7) << 11;
|
|
fpu.fcw = env->fpuc;
|
|
|
|
for (i = 0; i < 8; ++i) {
|
|
fpu.ftw |= (!env->fptags[i]) << i;
|
|
}
|
|
|
|
memcpy(fpu.st_mm, env->fpregs, sizeof(env->fpregs));
|
|
for (i = 0; i < 8; i++) {
|
|
stq_p(&fpu.mmx_1[i][0], env->xmm_regs[i].ZMM_Q(0));
|
|
stq_p(&fpu.mmx_1[i][8], env->xmm_regs[i].ZMM_Q(1));
|
|
if (CPU_NB_REGS > 8) {
|
|
stq_p(&fpu.mmx_2[i][0], env->xmm_regs[i + 8].ZMM_Q(0));
|
|
stq_p(&fpu.mmx_2[i][8], env->xmm_regs[i + 8].ZMM_Q(1));
|
|
}
|
|
}
|
|
|
|
fpu.mxcsr = env->mxcsr;
|
|
|
|
return hax_sync_fpu(env, &fpu, 1);
|
|
}
|
|
|
|
static int hax_arch_get_registers(CPUArchState *env)
|
|
{
|
|
int ret;
|
|
|
|
ret = hax_sync_vcpu_register(env, 0);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
ret = hax_get_fpu(env);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
ret = hax_get_msrs(env);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hax_arch_set_registers(CPUArchState *env)
|
|
{
|
|
int ret;
|
|
ret = hax_sync_vcpu_register(env, 1);
|
|
|
|
if (ret < 0) {
|
|
fprintf(stderr, "Failed to sync vcpu reg\n");
|
|
return ret;
|
|
}
|
|
ret = hax_set_fpu(env);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "FPU failed\n");
|
|
return ret;
|
|
}
|
|
ret = hax_set_msrs(env);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "MSR failed\n");
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void hax_vcpu_sync_state(CPUArchState *env, int modified)
|
|
{
|
|
if (hax_enabled()) {
|
|
if (modified) {
|
|
hax_arch_set_registers(env);
|
|
} else {
|
|
hax_arch_get_registers(env);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* much simpler than kvm, at least in first stage because:
|
|
* We don't need consider the device pass-through, we don't need
|
|
* consider the framebuffer, and we may even remove the bios at all
|
|
*/
|
|
int hax_sync_vcpus(void)
|
|
{
|
|
if (hax_enabled()) {
|
|
CPUState *cpu;
|
|
|
|
cpu = first_cpu;
|
|
if (!cpu) {
|
|
return 0;
|
|
}
|
|
|
|
for (; cpu != NULL; cpu = CPU_NEXT(cpu)) {
|
|
int ret;
|
|
|
|
ret = hax_arch_set_registers(cpu->env_ptr);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void hax_reset_vcpu_state(void *opaque)
|
|
{
|
|
CPUState *cpu;
|
|
for (cpu = first_cpu; cpu != NULL; cpu = CPU_NEXT(cpu)) {
|
|
cpu->hax_vcpu->tunnel->user_event_pending = 0;
|
|
cpu->hax_vcpu->tunnel->ready_for_interrupt_injection = 0;
|
|
}
|
|
}
|
|
|
|
static void hax_accel_class_init(ObjectClass *oc, void *data)
|
|
{
|
|
AccelClass *ac = ACCEL_CLASS(oc);
|
|
ac->name = "HAX";
|
|
ac->init_machine = hax_accel_init;
|
|
ac->allowed = &hax_allowed;
|
|
}
|
|
|
|
static const TypeInfo hax_accel_type = {
|
|
.name = ACCEL_CLASS_NAME("hax"),
|
|
.parent = TYPE_ACCEL,
|
|
.class_init = hax_accel_class_init,
|
|
};
|
|
|
|
static void hax_type_init(void)
|
|
{
|
|
type_register_static(&hax_accel_type);
|
|
}
|
|
|
|
type_init(hax_type_init);
|