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FRET-qemu/target-i386/machine.c
Juan Quintela 5ee0ffaa42 x86: make a20_mask int32_t 
This makes the savevm code correct, and sign extensins gives us exactly
what we need (namely, sign extend to 64 bits when used with 64bit addresess.

Once there, change 0x100000 for 1 << 20, that maks all a20 use the same syntax.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-10-05 09:32:39 -05:00

380 lines
11 KiB
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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;
uint16_t fptag, fpus, fpuc, fpregs_format;
int32_t pending_irq;
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 */
fpuc = env->fpuc;
fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
fptag = 0;
for(i = 0; i < 8; i++) {
fptag |= ((!env->fptags[i]) << i);
}
qemu_put_be16s(f, &fpuc);
qemu_put_be16s(f, &fpus);
qemu_put_be16s(f, &fptag);
#ifdef USE_X86LDOUBLE
fpregs_format = 0;
#else
fpregs_format = 1;
#endif
qemu_put_be16s(f, &fpregs_format);
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). */
pending_irq = -1;
for (i = 0; i < ARRAY_SIZE(env->interrupt_bitmap); i++) {
if (env->interrupt_bitmap[i]) {
bit = ctz64(env->interrupt_bitmap[i]);
pending_irq = i * 64 + bit;
break;
}
}
qemu_put_sbe32s(f, &pending_irq);
qemu_put_be32s(f, &env->mp_state);
qemu_put_be64s(f, &env->tsc);
/* MCE */
qemu_put_be64s(f, &env->mcg_cap);
if (env->mcg_cap) {
qemu_put_be64s(f, &env->mcg_status);
qemu_put_be64s(f, &env->mcg_ctl);
for (i = 0; i < (env->mcg_cap & 0xff); i++) {
qemu_put_be64s(f, &env->mce_banks[4*i]);
qemu_put_be64s(f, &env->mce_banks[4*i + 1]);
qemu_put_be64s(f, &env->mce_banks[4*i + 2]);
qemu_put_be64s(f, &env->mce_banks[4*i + 3]);
}
}
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;
uint16_t fpus, fpuc, fptag, fpregs_format;
int32_t pending_irq;
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, &fpuc);
qemu_get_be16s(f, &fpus);
qemu_get_be16s(f, &fptag);
qemu_get_be16s(f, &fpregs_format);
/* 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 = ((fptag == 0xff) && (fpus & 0x3800) == 0);
for(i = 0; i < 8; i++) {
uint64_t mant;
uint16_t exp;
switch(fpregs_format) {
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;
}
}
env->fpuc = fpuc;
/* XXX: restore FPU round state */
env->fpstt = (fpus >> 11) & 7;
env->fpus = fpus & ~0x3800;
fptag ^= 0xff;
for(i = 0; i < 8; i++) {
env->fptags[i] = (fptag >> 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, &pending_irq);
memset(&env->interrupt_bitmap, 0, sizeof(env->interrupt_bitmap));
if (pending_irq >= 0) {
env->interrupt_bitmap[pending_irq / 64] |=
(uint64_t)1 << (pending_irq % 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);
if (env->mcg_cap) {
qemu_get_be64s(f, &env->mcg_status);
qemu_get_be64s(f, &env->mcg_ctl);
for (i = 0; i < (env->mcg_cap & 0xff); i++) {
qemu_get_be64s(f, &env->mce_banks[4*i]);
qemu_get_be64s(f, &env->mce_banks[4*i + 1]);
qemu_get_be64s(f, &env->mce_banks[4*i + 2]);
qemu_get_be64s(f, &env->mce_banks[4*i + 3]);
}
}
}
if (version_id >= 11) {
qemu_get_be64s(f, &env->tsc_aux);
}
tlb_flush(env, 1);
return 0;
}
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