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qemu/target-i386/machine.c
Juan Quintela e5cc6429de x86: mcg_cap is never 0 
Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-10-05 09:32:42 -05:00

364 lines
10 KiB
C
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#include "hw/hw.h"
#include "hw/boards.h"
#include "hw/pc.h"
#include "hw/isa.h"
#include "host-utils.h"
#include "exec-all.h"
#include "kvm.h"
static void cpu_put_seg(QEMUFile *f, SegmentCache *dt)
{
qemu_put_be32(f, dt->selector);
qemu_put_betl(f, dt->base);
qemu_put_be32(f, dt->limit);
qemu_put_be32(f, dt->flags);
}
static void cpu_get_seg(QEMUFile *f, SegmentCache *dt)
{
dt->selector = qemu_get_be32(f);
dt->base = qemu_get_betl(f);
dt->limit = qemu_get_be32(f);
dt->flags = qemu_get_be32(f);
}
void cpu_save(QEMUFile *f, void *opaque)
{
CPUState *env = opaque;
int i, bit;
cpu_synchronize_state(env);
for(i = 0; i < CPU_NB_REGS; i++)
qemu_put_betls(f, &env->regs[i]);
qemu_put_betls(f, &env->eip);
qemu_put_betls(f, &env->eflags);
qemu_put_be32s(f, &env->hflags);
/* FPU */
env->fpus_vmstate = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
env->fptag_vmstate = 0;
for(i = 0; i < 8; i++) {
env->fptag_vmstate |= ((!env->fptags[i]) << i);
}
qemu_put_be16s(f, &env->fpuc);
qemu_put_be16s(f, &env->fpus_vmstate);
qemu_put_be16s(f, &env->fptag_vmstate);
#ifdef USE_X86LDOUBLE
env->fpregs_format_vmstate = 0;
#else
env->fpregs_format_vmstate = 1;
#endif
qemu_put_be16s(f, &env->fpregs_format_vmstate);
for(i = 0; i < 8; i++) {
#ifdef USE_X86LDOUBLE
{
uint64_t mant;
uint16_t exp;
/* we save the real CPU data (in case of MMX usage only 'mant'
contains the MMX register */
cpu_get_fp80(&mant, &exp, env->fpregs[i].d);
qemu_put_be64(f, mant);
qemu_put_be16(f, exp);
}
#else
/* if we use doubles for float emulation, we save the doubles to
avoid losing information in case of MMX usage. It can give
problems if the image is restored on a CPU where long
doubles are used instead. */
qemu_put_be64(f, env->fpregs[i].mmx.MMX_Q(0));
#endif
}
for(i = 0; i < 6; i++)
cpu_put_seg(f, &env->segs[i]);
cpu_put_seg(f, &env->ldt);
cpu_put_seg(f, &env->tr);
cpu_put_seg(f, &env->gdt);
cpu_put_seg(f, &env->idt);
qemu_put_be32s(f, &env->sysenter_cs);
qemu_put_betls(f, &env->sysenter_esp);
qemu_put_betls(f, &env->sysenter_eip);
qemu_put_betls(f, &env->cr[0]);
qemu_put_betls(f, &env->cr[2]);
qemu_put_betls(f, &env->cr[3]);
qemu_put_betls(f, &env->cr[4]);
for(i = 0; i < 8; i++)
qemu_put_betls(f, &env->dr[i]);
/* MMU */
qemu_put_sbe32s(f, &env->a20_mask);
/* XMM */
qemu_put_be32s(f, &env->mxcsr);
for(i = 0; i < CPU_NB_REGS; i++) {
qemu_put_be64s(f, &env->xmm_regs[i].XMM_Q(0));
qemu_put_be64s(f, &env->xmm_regs[i].XMM_Q(1));
}
#ifdef TARGET_X86_64
qemu_put_be64s(f, &env->efer);
qemu_put_be64s(f, &env->star);
qemu_put_be64s(f, &env->lstar);
qemu_put_be64s(f, &env->cstar);
qemu_put_be64s(f, &env->fmask);
qemu_put_be64s(f, &env->kernelgsbase);
#endif
qemu_put_be32s(f, &env->smbase);
qemu_put_be64s(f, &env->pat);
qemu_put_be32s(f, &env->hflags2);
qemu_put_be64s(f, &env->vm_hsave);
qemu_put_be64s(f, &env->vm_vmcb);
qemu_put_be64s(f, &env->tsc_offset);
qemu_put_be64s(f, &env->intercept);
qemu_put_be16s(f, &env->intercept_cr_read);
qemu_put_be16s(f, &env->intercept_cr_write);
qemu_put_be16s(f, &env->intercept_dr_read);
qemu_put_be16s(f, &env->intercept_dr_write);
qemu_put_be32s(f, &env->intercept_exceptions);
qemu_put_8s(f, &env->v_tpr);
/* MTRRs */
for(i = 0; i < 11; i++)
qemu_put_be64s(f, &env->mtrr_fixed[i]);
qemu_put_be64s(f, &env->mtrr_deftype);
for(i = 0; i < 8; i++) {
qemu_put_be64s(f, &env->mtrr_var[i].base);
qemu_put_be64s(f, &env->mtrr_var[i].mask);
}
/* KVM-related states */
/* There can only be one pending IRQ set in the bitmap at a time, so try
to find it and save its number instead (-1 for none). */
env->pending_irq_vmstate = -1;
for (i = 0; i < ARRAY_SIZE(env->interrupt_bitmap); i++) {
if (env->interrupt_bitmap[i]) {
bit = ctz64(env->interrupt_bitmap[i]);
env->pending_irq_vmstate = i * 64 + bit;
break;
}
}
qemu_put_sbe32s(f, &env->pending_irq_vmstate);
qemu_put_be32s(f, &env->mp_state);
qemu_put_be64s(f, &env->tsc);
/* MCE */
qemu_put_be64s(f, &env->mcg_cap);
qemu_put_be64s(f, &env->mcg_status);
qemu_put_be64s(f, &env->mcg_ctl);
for (i = 0; i < MCE_BANKS_DEF * 4; i++) {
qemu_put_be64s(f, &env->mce_banks[i]);
}
qemu_put_be64s(f, &env->tsc_aux);
}
#ifdef USE_X86LDOUBLE
/* XXX: add that in a FPU generic layer */
union x86_longdouble {
uint64_t mant;
uint16_t exp;
};
#define MANTD1(fp) (fp & ((1LL << 52) - 1))
#define EXPBIAS1 1023
#define EXPD1(fp) ((fp >> 52) & 0x7FF)
#define SIGND1(fp) ((fp >> 32) & 0x80000000)
static void fp64_to_fp80(union x86_longdouble *p, uint64_t temp)
{
int e;
/* mantissa */
p->mant = (MANTD1(temp) << 11) | (1LL << 63);
/* exponent + sign */
e = EXPD1(temp) - EXPBIAS1 + 16383;
e |= SIGND1(temp) >> 16;
p->exp = e;
}
#endif
int cpu_load(QEMUFile *f, void *opaque, int version_id)
{
CPUState *env = opaque;
int i, guess_mmx;
cpu_synchronize_state(env);
if (version_id < 3 || version_id > CPU_SAVE_VERSION)
return -EINVAL;
for(i = 0; i < CPU_NB_REGS; i++)
qemu_get_betls(f, &env->regs[i]);
qemu_get_betls(f, &env->eip);
qemu_get_betls(f, &env->eflags);
qemu_get_be32s(f, &env->hflags);
qemu_get_be16s(f, &env->fpuc);
qemu_get_be16s(f, &env->fpus_vmstate);
qemu_get_be16s(f, &env->fptag_vmstate);
qemu_get_be16s(f, &env->fpregs_format_vmstate);
/* NOTE: we cannot always restore the FPU state if the image come
from a host with a different 'USE_X86LDOUBLE' define. We guess
if we are in an MMX state to restore correctly in that case. */
guess_mmx = ((env->fptag_vmstate == 0xff) && (env->fpus_vmstate & 0x3800) == 0);
for(i = 0; i < 8; i++) {
uint64_t mant;
uint16_t exp;
switch(env->fpregs_format_vmstate) {
case 0:
mant = qemu_get_be64(f);
exp = qemu_get_be16(f);
#ifdef USE_X86LDOUBLE
env->fpregs[i].d = cpu_set_fp80(mant, exp);
#else
/* difficult case */
if (guess_mmx)
env->fpregs[i].mmx.MMX_Q(0) = mant;
else
env->fpregs[i].d = cpu_set_fp80(mant, exp);
#endif
break;
case 1:
mant = qemu_get_be64(f);
#ifdef USE_X86LDOUBLE
{
union x86_longdouble *p;
/* difficult case */
p = (void *)&env->fpregs[i];
if (guess_mmx) {
p->mant = mant;
p->exp = 0xffff;
} else {
fp64_to_fp80(p, mant);
}
}
#else
env->fpregs[i].mmx.MMX_Q(0) = mant;
#endif
break;
default:
return -EINVAL;
}
}
/* XXX: restore FPU round state */
env->fpstt = (env->fpus_vmstate >> 11) & 7;
env->fpus = env->fpus_vmstate & ~0x3800;
env->fptag_vmstate ^= 0xff;
for(i = 0; i < 8; i++) {
env->fptags[i] = (env->fptag_vmstate >> i) & 1;
}
for(i = 0; i < 6; i++)
cpu_get_seg(f, &env->segs[i]);
cpu_get_seg(f, &env->ldt);
cpu_get_seg(f, &env->tr);
cpu_get_seg(f, &env->gdt);
cpu_get_seg(f, &env->idt);
qemu_get_be32s(f, &env->sysenter_cs);
if (version_id >= 7) {
qemu_get_betls(f, &env->sysenter_esp);
qemu_get_betls(f, &env->sysenter_eip);
} else {
env->sysenter_esp = qemu_get_be32(f);
env->sysenter_eip = qemu_get_be32(f);
}
qemu_get_betls(f, &env->cr[0]);
qemu_get_betls(f, &env->cr[2]);
qemu_get_betls(f, &env->cr[3]);
qemu_get_betls(f, &env->cr[4]);
for(i = 0; i < 8; i++)
qemu_get_betls(f, &env->dr[i]);
cpu_breakpoint_remove_all(env, BP_CPU);
cpu_watchpoint_remove_all(env, BP_CPU);
for (i = 0; i < 4; i++)
hw_breakpoint_insert(env, i);
qemu_get_sbe32s(f, &env->a20_mask);
qemu_get_be32s(f, &env->mxcsr);
for(i = 0; i < CPU_NB_REGS; i++) {
qemu_get_be64s(f, &env->xmm_regs[i].XMM_Q(0));
qemu_get_be64s(f, &env->xmm_regs[i].XMM_Q(1));
}
#ifdef TARGET_X86_64
qemu_get_be64s(f, &env->efer);
qemu_get_be64s(f, &env->star);
qemu_get_be64s(f, &env->lstar);
qemu_get_be64s(f, &env->cstar);
qemu_get_be64s(f, &env->fmask);
qemu_get_be64s(f, &env->kernelgsbase);
#endif
if (version_id >= 4) {
qemu_get_be32s(f, &env->smbase);
}
if (version_id >= 5) {
qemu_get_be64s(f, &env->pat);
qemu_get_be32s(f, &env->hflags2);
if (version_id < 6)
qemu_get_be32s(f, &env->halted);
qemu_get_be64s(f, &env->vm_hsave);
qemu_get_be64s(f, &env->vm_vmcb);
qemu_get_be64s(f, &env->tsc_offset);
qemu_get_be64s(f, &env->intercept);
qemu_get_be16s(f, &env->intercept_cr_read);
qemu_get_be16s(f, &env->intercept_cr_write);
qemu_get_be16s(f, &env->intercept_dr_read);
qemu_get_be16s(f, &env->intercept_dr_write);
qemu_get_be32s(f, &env->intercept_exceptions);
qemu_get_8s(f, &env->v_tpr);
}
if (version_id >= 8) {
/* MTRRs */
for(i = 0; i < 11; i++)
qemu_get_be64s(f, &env->mtrr_fixed[i]);
qemu_get_be64s(f, &env->mtrr_deftype);
for(i = 0; i < 8; i++) {
qemu_get_be64s(f, &env->mtrr_var[i].base);
qemu_get_be64s(f, &env->mtrr_var[i].mask);
}
}
if (version_id >= 9) {
qemu_get_sbe32s(f, &env->pending_irq_vmstate);
memset(&env->interrupt_bitmap, 0, sizeof(env->interrupt_bitmap));
if (env->pending_irq_vmstate >= 0) {
env->interrupt_bitmap[env->pending_irq_vmstate / 64] |=
(uint64_t)1 << (env->pending_irq_vmstate % 64);
}
qemu_get_be32s(f, &env->mp_state);
qemu_get_be64s(f, &env->tsc);
}
if (version_id >= 10) {
qemu_get_be64s(f, &env->mcg_cap);
qemu_get_be64s(f, &env->mcg_status);
qemu_get_be64s(f, &env->mcg_ctl);
for (i = 0; i < MCE_BANKS_DEF * 4; i++) {
qemu_get_be64s(f, &env->mce_banks[i]);
}
}
if (version_id >= 11) {
qemu_get_be64s(f, &env->tsc_aux);
}
tlb_flush(env, 1);
return 0;
}
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