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/*
* i386 TCG cpu class initialization
*
* Copyright (c) 2003 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "helper-tcg.h"
#include "qemu/accel.h"
#include "hw/core/accel-cpu.h"
#include "tcg-cpu.h"
/* Frob eflags into and out of the CPU temporary format. */
static void x86_cpu_exec_enter(CPUState *cs)
{
X86CPU *cpu = X86_CPU(cs);
CPUX86State *env = &cpu->env;
CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
env->df = 1 - (2 * ((env->eflags >> 10) & 1));
CC_OP = CC_OP_EFLAGS;
env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
}
static void x86_cpu_exec_exit(CPUState *cs)
{
X86CPU *cpu = X86_CPU(cs);
CPUX86State *env = &cpu->env;
env->eflags = cpu_compute_eflags(env);
}
static void x86_cpu_synchronize_from_tb(CPUState *cs,
const TranslationBlock *tb)
{
/* The instruction pointer is always up to date with CF_PCREL. */
if (!(tb_cflags(tb) & CF_PCREL)) {
CPUX86State *env = cpu_env(cs);
if (tb->flags & HF_CS64_MASK) {
env->eip = tb->pc;
} else {
env->eip = (uint32_t)(tb->pc - tb->cs_base);
}
}
}
static void x86_restore_state_to_opc(CPUState *cs,
const TranslationBlock *tb,
const uint64_t *data)
{
X86CPU *cpu = X86_CPU(cs);
CPUX86State *env = &cpu->env;
int cc_op = data[1];
uint64_t new_pc;
if (tb_cflags(tb) & CF_PCREL) {
/*
* data[0] in PC-relative TBs is also a linear address, i.e. an address with
* the CS base added, because it is not guaranteed that EIP bits 12 and higher
* stay the same across the translation block. Add the CS base back before
* replacing the low bits, and subtract it below just like for !CF_PCREL.
*/
uint64_t pc = env->eip + tb->cs_base;
new_pc = (pc & TARGET_PAGE_MASK) | data[0];
} else {
new_pc = data[0];
}
if (tb->flags & HF_CS64_MASK) {
env->eip = new_pc;
} else {
env->eip = (uint32_t)(new_pc - tb->cs_base);
}
if (cc_op != CC_OP_DYNAMIC) {
env->cc_op = cc_op;
}
}
#ifndef CONFIG_USER_ONLY
static bool x86_debug_check_breakpoint(CPUState *cs)
{
X86CPU *cpu = X86_CPU(cs);
CPUX86State *env = &cpu->env;
/* RF disables all architectural breakpoints. */
return !(env->eflags & RF_MASK);
}
#endif
#include "hw/core/tcg-cpu-ops.h"
static const TCGCPUOps x86_tcg_ops = {
.initialize = tcg_x86_init,
.synchronize_from_tb = x86_cpu_synchronize_from_tb,
.restore_state_to_opc = x86_restore_state_to_opc,
.cpu_exec_enter = x86_cpu_exec_enter,
.cpu_exec_exit = x86_cpu_exec_exit,
#ifdef CONFIG_USER_ONLY
.fake_user_interrupt = x86_cpu_do_interrupt,
.record_sigsegv = x86_cpu_record_sigsegv,
.record_sigbus = x86_cpu_record_sigbus,
#else
.tlb_fill = x86_cpu_tlb_fill,
.do_interrupt = x86_cpu_do_interrupt,
.cpu_exec_interrupt = x86_cpu_exec_interrupt,
.do_unaligned_access = x86_cpu_do_unaligned_access,
.debug_excp_handler = breakpoint_handler,
.debug_check_breakpoint = x86_debug_check_breakpoint,
.need_replay_interrupt = x86_need_replay_interrupt,
#endif /* !CONFIG_USER_ONLY */
};
static void x86_tcg_cpu_init_ops(AccelCPUClass *accel_cpu, CPUClass *cc)
{
/* for x86, all cpus use the same set of operations */
cc->tcg_ops = &x86_tcg_ops;
}
static void x86_tcg_cpu_class_init(CPUClass *cc)
{
cc->init_accel_cpu = x86_tcg_cpu_init_ops;
}
static void x86_tcg_cpu_xsave_init(void)
{
#define XO(bit, field) \
x86_ext_save_areas[bit].offset = offsetof(X86XSaveArea, field);
XO(XSTATE_FP_BIT, legacy);
XO(XSTATE_SSE_BIT, legacy);
XO(XSTATE_YMM_BIT, avx_state);
XO(XSTATE_BNDREGS_BIT, bndreg_state);
XO(XSTATE_BNDCSR_BIT, bndcsr_state);
XO(XSTATE_OPMASK_BIT, opmask_state);
XO(XSTATE_ZMM_Hi256_BIT, zmm_hi256_state);
XO(XSTATE_Hi16_ZMM_BIT, hi16_zmm_state);
XO(XSTATE_PKRU_BIT, pkru_state);
#undef XO
}
/*
* TCG-specific defaults that override cpudef models when using TCG.
* Only for builtin_x86_defs models initialized with x86_register_cpudef_types.
*/
static PropValue x86_tcg_default_props[] = {
{ "vme", "off" },
{ NULL, NULL },
};
static void x86_tcg_cpu_instance_init(CPUState *cs)
{
X86CPU *cpu = X86_CPU(cs);
X86CPUClass *xcc = X86_CPU_GET_CLASS(cpu);
if (xcc->model) {
/* Special cases not set in the X86CPUDefinition structs: */
x86_cpu_apply_props(cpu, x86_tcg_default_props);
}
x86_tcg_cpu_xsave_init();
}
static void x86_tcg_cpu_accel_class_init(ObjectClass *oc, void *data)
{
AccelCPUClass *acc = ACCEL_CPU_CLASS(oc);
#ifndef CONFIG_USER_ONLY
acc->cpu_target_realize = tcg_cpu_realizefn;
#endif /* CONFIG_USER_ONLY */
acc->cpu_class_init = x86_tcg_cpu_class_init;
acc->cpu_instance_init = x86_tcg_cpu_instance_init;
}
static const TypeInfo x86_tcg_cpu_accel_type_info = {
.name = ACCEL_CPU_NAME("tcg"),
.parent = TYPE_ACCEL_CPU,
.class_init = x86_tcg_cpu_accel_class_init,
.abstract = true,
};
static void x86_tcg_cpu_accel_register_types(void)
{
type_register_static(&x86_tcg_cpu_accel_type_info);
}
type_init(x86_tcg_cpu_accel_register_types);
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