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qemu/target/i386/hax/hax-all.c
Claudio Fontana 7fdef0d4f2 i386: move hax accel files into hax/ 
Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20201212155530.23098-4-cfontana@suse.de>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2020-12-16 14:06:53 -05:00

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/*
* QEMU HAX support
*
* Copyright IBM, Corp. 2008
* Red Hat, Inc. 2008
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.com>
* Glauber Costa <gcosta@redhat.com>
*
* Copyright (c) 2011 Intel Corporation
* Written by:
* Jiang Yunhong<yunhong.jiang@intel.com>
* Xin Xiaohui<xiaohui.xin@intel.com>
* Zhang Xiantao<xiantao.zhang@intel.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
/*
* HAX common code for both windows and darwin
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/address-spaces.h"
#include "qemu-common.h"
#include "sysemu/accel.h"
#include "sysemu/reset.h"
#include "sysemu/runstate.h"
#include "hw/boards.h"
#include "hax-cpus.h"
#define DEBUG_HAX 0
#define DPRINTF(fmt, ...) \
do { \
if (DEBUG_HAX) { \
fprintf(stdout, fmt, ## __VA_ARGS__); \
} \
} while (0)
/* Current version */
const uint32_t hax_cur_version = 0x4; /* API v4: unmapping and MMIO moves */
/* Minimum HAX kernel version */
const uint32_t hax_min_version = 0x4; /* API v4: supports unmapping */
static bool hax_allowed;
struct hax_state hax_global;
static void hax_vcpu_sync_state(CPUArchState *env, int modified);
static int hax_arch_get_registers(CPUArchState *env);
int hax_enabled(void)
{
return hax_allowed;
}
int valid_hax_tunnel_size(uint16_t size)
{
return size >= sizeof(struct hax_tunnel);
}
hax_fd hax_vcpu_get_fd(CPUArchState *env)
{
struct hax_vcpu_state *vcpu = env_cpu(env)->hax_vcpu;
if (!vcpu) {
return HAX_INVALID_FD;
}
return vcpu->fd;
}
static int hax_get_capability(struct hax_state *hax)
{
int ret;
struct hax_capabilityinfo capinfo, *cap = &capinfo;
ret = hax_capability(hax, cap);
if (ret) {
return ret;
}
if ((cap->wstatus & HAX_CAP_WORKSTATUS_MASK) == HAX_CAP_STATUS_NOTWORKING) {
if (cap->winfo & HAX_CAP_FAILREASON_VT) {
DPRINTF
("VTX feature is not enabled, HAX driver will not work.\n");
} else if (cap->winfo & HAX_CAP_FAILREASON_NX) {
DPRINTF
("NX feature is not enabled, HAX driver will not work.\n");
}
return -ENXIO;
}
if (!(cap->winfo & HAX_CAP_UG)) {
fprintf(stderr, "UG mode is not supported by the hardware.\n");
return -ENOTSUP;
}
hax->supports_64bit_ramblock = !!(cap->winfo & HAX_CAP_64BIT_RAMBLOCK);
if (cap->wstatus & HAX_CAP_MEMQUOTA) {
if (cap->mem_quota < hax->mem_quota) {
fprintf(stderr, "The VM memory needed exceeds the driver limit.\n");
return -ENOSPC;
}
}
return 0;
}
static int hax_version_support(struct hax_state *hax)
{
int ret;
struct hax_module_version version;
ret = hax_mod_version(hax, &version);
if (ret < 0) {
return 0;
}
if (hax_min_version > version.cur_version) {
fprintf(stderr, "Incompatible HAX module version %d,",
version.cur_version);
fprintf(stderr, "requires minimum version %d\n", hax_min_version);
return 0;
}
if (hax_cur_version < version.compat_version) {
fprintf(stderr, "Incompatible QEMU HAX API version %x,",
hax_cur_version);
fprintf(stderr, "requires minimum HAX API version %x\n",
version.compat_version);
return 0;
}
return 1;
}
int hax_vcpu_create(int id)
{
struct hax_vcpu_state *vcpu = NULL;
int ret;
if (!hax_global.vm) {
fprintf(stderr, "vcpu %x created failed, vm is null\n", id);
return -1;
}
if (hax_global.vm->vcpus[id]) {
fprintf(stderr, "vcpu %x allocated already\n", id);
return 0;
}
vcpu = g_new0(struct hax_vcpu_state, 1);
ret = hax_host_create_vcpu(hax_global.vm->fd, id);
if (ret) {
fprintf(stderr, "Failed to create vcpu %x\n", id);
goto error;
}
vcpu->vcpu_id = id;
vcpu->fd = hax_host_open_vcpu(hax_global.vm->id, id);
if (hax_invalid_fd(vcpu->fd)) {
fprintf(stderr, "Failed to open the vcpu\n");
ret = -ENODEV;
goto error;
}
hax_global.vm->vcpus[id] = vcpu;
ret = hax_host_setup_vcpu_channel(vcpu);
if (ret) {
fprintf(stderr, "Invalid hax tunnel size\n");
ret = -EINVAL;
goto error;
}
return 0;
error:
/* vcpu and tunnel will be closed automatically */
if (vcpu && !hax_invalid_fd(vcpu->fd)) {
hax_close_fd(vcpu->fd);
}
hax_global.vm->vcpus[id] = NULL;
g_free(vcpu);
return -1;
}
int hax_vcpu_destroy(CPUState *cpu)
{
struct hax_vcpu_state *vcpu = cpu->hax_vcpu;
if (!hax_global.vm) {
fprintf(stderr, "vcpu %x destroy failed, vm is null\n", vcpu->vcpu_id);
return -1;
}
if (!vcpu) {
return 0;
}
/*
* 1. The hax_tunnel is also destroyed when vcpu is destroyed
* 2. close fd will cause hax module vcpu be cleaned
*/
hax_close_fd(vcpu->fd);
hax_global.vm->vcpus[vcpu->vcpu_id] = NULL;
g_free(vcpu);
return 0;
}
int hax_init_vcpu(CPUState *cpu)
{
int ret;
ret = hax_vcpu_create(cpu->cpu_index);
if (ret < 0) {
fprintf(stderr, "Failed to create HAX vcpu\n");
exit(-1);
}
cpu->hax_vcpu = hax_global.vm->vcpus[cpu->cpu_index];
cpu->vcpu_dirty = true;
qemu_register_reset(hax_reset_vcpu_state, (CPUArchState *) (cpu->env_ptr));
return ret;
}
struct hax_vm *hax_vm_create(struct hax_state *hax, int max_cpus)
{
struct hax_vm *vm;
int vm_id = 0, ret, i;
if (hax_invalid_fd(hax->fd)) {
return NULL;
}
if (hax->vm) {
return hax->vm;
}
if (max_cpus > HAX_MAX_VCPU) {
fprintf(stderr, "Maximum VCPU number QEMU supported is %d\n", HAX_MAX_VCPU);
return NULL;
}
vm = g_new0(struct hax_vm, 1);
ret = hax_host_create_vm(hax, &vm_id);
if (ret) {
fprintf(stderr, "Failed to create vm %x\n", ret);
goto error;
}
vm->id = vm_id;
vm->fd = hax_host_open_vm(hax, vm_id);
if (hax_invalid_fd(vm->fd)) {
fprintf(stderr, "Failed to open vm %d\n", vm_id);
goto error;
}
vm->numvcpus = max_cpus;
vm->vcpus = g_new0(struct hax_vcpu_state *, vm->numvcpus);
for (i = 0; i < vm->numvcpus; i++) {
vm->vcpus[i] = NULL;
}
hax->vm = vm;
return vm;
error:
g_free(vm);
hax->vm = NULL;
return NULL;
}
int hax_vm_destroy(struct hax_vm *vm)
{
int i;
for (i = 0; i < vm->numvcpus; i++)
if (vm->vcpus[i]) {
fprintf(stderr, "VCPU should be cleaned before vm clean\n");
return -1;
}
hax_close_fd(vm->fd);
vm->numvcpus = 0;
g_free(vm->vcpus);
g_free(vm);
hax_global.vm = NULL;
return 0;
}
static int hax_init(ram_addr_t ram_size, int max_cpus)
{
struct hax_state *hax = NULL;
struct hax_qemu_version qversion;
int ret;
hax = &hax_global;
memset(hax, 0, sizeof(struct hax_state));
hax->mem_quota = ram_size;
hax->fd = hax_mod_open();
if (hax_invalid_fd(hax->fd)) {
hax->fd = 0;
ret = -ENODEV;
goto error;
}
ret = hax_get_capability(hax);
if (ret) {
if (ret != -ENOSPC) {
ret = -EINVAL;
}
goto error;
}
if (!hax_version_support(hax)) {
ret = -EINVAL;
goto error;
}
hax->vm = hax_vm_create(hax, max_cpus);
if (!hax->vm) {
fprintf(stderr, "Failed to create HAX VM\n");
ret = -EINVAL;
goto error;
}
hax_memory_init();
qversion.cur_version = hax_cur_version;
qversion.min_version = hax_min_version;
hax_notify_qemu_version(hax->vm->fd, &qversion);
return ret;
error:
if (hax->vm) {
hax_vm_destroy(hax->vm);
}
if (hax->fd) {
hax_mod_close(hax);
}
return ret;
}
static int hax_accel_init(MachineState *ms)
{
int ret = hax_init(ms->ram_size, (int)ms->smp.max_cpus);
if (ret && (ret != -ENOSPC)) {
fprintf(stderr, "No accelerator found.\n");
} else {
fprintf(stdout, "HAX is %s and emulator runs in %s mode.\n",
!ret ? "working" : "not working",
!ret ? "fast virt" : "emulation");
}
if (ret == 0) {
cpus_register_accel(&hax_cpus);
}
return ret;
}
static int hax_handle_fastmmio(CPUArchState *env, struct hax_fastmmio *hft)
{
if (hft->direction < 2) {
cpu_physical_memory_rw(hft->gpa, &hft->value, hft->size,
hft->direction);
} else {
/*
* HAX API v4 supports transferring data between two MMIO addresses,
* hft->gpa and hft->gpa2 (instructions such as MOVS require this):
* hft->direction == 2: gpa ==> gpa2
*/
uint64_t value;
cpu_physical_memory_read(hft->gpa, &value, hft->size);
cpu_physical_memory_write(hft->gpa2, &value, hft->size);
}
return 0;
}
static int hax_handle_io(CPUArchState *env, uint32_t df, uint16_t port,
int direction, int size, int count, void *buffer)
{
uint8_t *ptr;
int i;
MemTxAttrs attrs = { 0 };
if (!df) {
ptr = (uint8_t *) buffer;
} else {
ptr = buffer + size * count - size;
}
for (i = 0; i < count; i++) {
address_space_rw(&address_space_io, port, attrs,
ptr, size, direction == HAX_EXIT_IO_OUT);
if (!df) {
ptr += size;
} else {
ptr -= size;
}
}
return 0;
}
static int hax_vcpu_interrupt(CPUArchState *env)
{
CPUState *cpu = env_cpu(env);
struct hax_vcpu_state *vcpu = cpu->hax_vcpu;
struct hax_tunnel *ht = vcpu->tunnel;
/*
* Try to inject an interrupt if the guest can accept it
* Unlike KVM, HAX kernel check for the eflags, instead of qemu
*/
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_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;
}
if (cpu->interrupt_request & CPU_INTERRUPT_POLL) {
cpu->interrupt_request &= ~CPU_INTERRUPT_POLL;
apic_poll_irq(x86_cpu->apic_state);
}
/* After a vcpu is halted (either because it is an AP and has just been
* reset, or because it has executed the HLT instruction), it will not be
* run (hax_vcpu_run()) until it is unhalted. The next few if blocks check
* for events that may change the halted state of this vcpu:
* a) Maskable interrupt, when RFLAGS.IF is 1;
* Note: env->eflags may not reflect the current RFLAGS state, because
* it is not updated after each hax_vcpu_run(). We cannot afford
* to fail to recognize any unhalt-by-maskable-interrupt event
* (in which case the vcpu will halt forever), and yet we cannot
* afford the overhead of hax_vcpu_sync_state(). The current
* solution is to err on the side of caution and have the HLT
* handler (see case HAX_EXIT_HLT below) unconditionally set the
* IF_MASK bit in env->eflags, which, in effect, disables the
* RFLAGS.IF check.
* b) NMI;
* c) INIT signal;
* d) SIPI signal.
*/
if (((cpu->interrupt_request & CPU_INTERRUPT_HARD) &&
(env->eflags & IF_MASK)) ||
(cpu->interrupt_request & CPU_INTERRUPT_NMI)) {
cpu->halted = 0;
}
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);
}
if (cpu->halted) {
/* If this vcpu is halted, we must not ask HAXM to run it. Instead, we
* break out of hax_smp_cpu_exec() as if this vcpu had executed HLT.
* That way, this vcpu thread will be trapped in qemu_wait_io_event(),
* until the vcpu is unhalted.
*/
cpu->exception_index = EXCP_HLT;
return 0;
}
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, 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, 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;
}
static int hax_sync_vcpu_register(CPUArchState *env, int set)
{
struct vcpu_state_t regs;
int ret;
memset(&regs, 0, sizeof(struct vcpu_state_t));
if (!set) {
ret = hax_sync_vcpu_state(env, &regs, 0);
if (ret < 0) {
return -1;
}
}
/* generic register */
hax_getput_reg(&regs._rax, &env->regs[R_EAX], set);
hax_getput_reg(&regs._rbx, &env->regs[R_EBX], set);
hax_getput_reg(&regs._rcx, &env->regs[R_ECX], set);
hax_getput_reg(&regs._rdx, &env->regs[R_EDX], set);
hax_getput_reg(&regs._rsi, &env->regs[R_ESI], set);
hax_getput_reg(&regs._rdi, &env->regs[R_EDI], set);
hax_getput_reg(&regs._rsp, &env->regs[R_ESP], set);
hax_getput_reg(&regs._rbp, &env->regs[R_EBP], set);
#ifdef TARGET_X86_64
hax_getput_reg(&regs._r8, &env->regs[8], set);
hax_getput_reg(&regs._r9, &env->regs[9], set);
hax_getput_reg(&regs._r10, &env->regs[10], set);
hax_getput_reg(&regs._r11, &env->regs[11], set);
hax_getput_reg(&regs._r12, &env->regs[12], set);
hax_getput_reg(&regs._r13, &env->regs[13], set);
hax_getput_reg(&regs._r14, &env->regs[14], set);
hax_getput_reg(&regs._r15, &env->regs[15], set);
#endif
hax_getput_reg(&regs._rflags, &env->eflags, set);
hax_getput_reg(&regs._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, &regs);
} 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, &regs);
}
if (set) {
ret = hax_sync_vcpu_state(env, &regs, 1);
if (ret < 0) {
return -1;
}
}
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;
}
x86_update_hflags(env);
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);
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