qemu/target-ppc/machine.c
Alexey Kardashevskiy 569be9f055 target-ppc: Remove PVR check from migration
Currently migration fails if CPU version (PVR register) is different
even a bit. This check is performed at the very end of migration when
device states are sent. This is too late for management software and
we need to provide a way for the user to make sure that migration
will succeed if QEMU is started with appropritate command line parameters.

This removes the PVR check.

This resets PVR to the default value as the existing VMSTATE record
for SPR array sends all 1024 registers unconditionally and overwrites
the destination PVR.

If the user wants some guarantees for migration to succeed, then
a CPU name or "host" CPU with a "compat" option (on its way to upsteam)
should be used and KVM or TCG is expected to fail on unsupported values
at the moment of QEMU start.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>
2014-06-16 13:24:27 +02:00

530 lines
15 KiB
C

#include "hw/hw.h"
#include "hw/boards.h"
#include "sysemu/kvm.h"
#include "helper_regs.h"
static int cpu_load_old(QEMUFile *f, void *opaque, int version_id)
{
PowerPCCPU *cpu = opaque;
CPUPPCState *env = &cpu->env;
unsigned int i, j;
target_ulong sdr1;
uint32_t fpscr;
target_ulong xer;
for (i = 0; i < 32; i++)
qemu_get_betls(f, &env->gpr[i]);
#if !defined(TARGET_PPC64)
for (i = 0; i < 32; i++)
qemu_get_betls(f, &env->gprh[i]);
#endif
qemu_get_betls(f, &env->lr);
qemu_get_betls(f, &env->ctr);
for (i = 0; i < 8; i++)
qemu_get_be32s(f, &env->crf[i]);
qemu_get_betls(f, &xer);
cpu_write_xer(env, xer);
qemu_get_betls(f, &env->reserve_addr);
qemu_get_betls(f, &env->msr);
for (i = 0; i < 4; i++)
qemu_get_betls(f, &env->tgpr[i]);
for (i = 0; i < 32; i++) {
union {
float64 d;
uint64_t l;
} u;
u.l = qemu_get_be64(f);
env->fpr[i] = u.d;
}
qemu_get_be32s(f, &fpscr);
env->fpscr = fpscr;
qemu_get_sbe32s(f, &env->access_type);
#if defined(TARGET_PPC64)
qemu_get_betls(f, &env->spr[SPR_ASR]);
qemu_get_sbe32s(f, &env->slb_nr);
#endif
qemu_get_betls(f, &sdr1);
for (i = 0; i < 32; i++)
qemu_get_betls(f, &env->sr[i]);
for (i = 0; i < 2; i++)
for (j = 0; j < 8; j++)
qemu_get_betls(f, &env->DBAT[i][j]);
for (i = 0; i < 2; i++)
for (j = 0; j < 8; j++)
qemu_get_betls(f, &env->IBAT[i][j]);
qemu_get_sbe32s(f, &env->nb_tlb);
qemu_get_sbe32s(f, &env->tlb_per_way);
qemu_get_sbe32s(f, &env->nb_ways);
qemu_get_sbe32s(f, &env->last_way);
qemu_get_sbe32s(f, &env->id_tlbs);
qemu_get_sbe32s(f, &env->nb_pids);
if (env->tlb.tlb6) {
// XXX assumes 6xx
for (i = 0; i < env->nb_tlb; i++) {
qemu_get_betls(f, &env->tlb.tlb6[i].pte0);
qemu_get_betls(f, &env->tlb.tlb6[i].pte1);
qemu_get_betls(f, &env->tlb.tlb6[i].EPN);
}
}
for (i = 0; i < 4; i++)
qemu_get_betls(f, &env->pb[i]);
for (i = 0; i < 1024; i++)
qemu_get_betls(f, &env->spr[i]);
if (!env->external_htab) {
ppc_store_sdr1(env, sdr1);
}
qemu_get_be32s(f, &env->vscr);
qemu_get_be64s(f, &env->spe_acc);
qemu_get_be32s(f, &env->spe_fscr);
qemu_get_betls(f, &env->msr_mask);
qemu_get_be32s(f, &env->flags);
qemu_get_sbe32s(f, &env->error_code);
qemu_get_be32s(f, &env->pending_interrupts);
qemu_get_be32s(f, &env->irq_input_state);
for (i = 0; i < POWERPC_EXCP_NB; i++)
qemu_get_betls(f, &env->excp_vectors[i]);
qemu_get_betls(f, &env->excp_prefix);
qemu_get_betls(f, &env->ivor_mask);
qemu_get_betls(f, &env->ivpr_mask);
qemu_get_betls(f, &env->hreset_vector);
qemu_get_betls(f, &env->nip);
qemu_get_betls(f, &env->hflags);
qemu_get_betls(f, &env->hflags_nmsr);
qemu_get_sbe32s(f, &env->mmu_idx);
qemu_get_sbe32(f); /* Discard unused power_mode */
return 0;
}
static int get_avr(QEMUFile *f, void *pv, size_t size)
{
ppc_avr_t *v = pv;
v->u64[0] = qemu_get_be64(f);
v->u64[1] = qemu_get_be64(f);
return 0;
}
static void put_avr(QEMUFile *f, void *pv, size_t size)
{
ppc_avr_t *v = pv;
qemu_put_be64(f, v->u64[0]);
qemu_put_be64(f, v->u64[1]);
}
static const VMStateInfo vmstate_info_avr = {
.name = "avr",
.get = get_avr,
.put = put_avr,
};
#define VMSTATE_AVR_ARRAY_V(_f, _s, _n, _v) \
VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_avr, ppc_avr_t)
#define VMSTATE_AVR_ARRAY(_f, _s, _n) \
VMSTATE_AVR_ARRAY_V(_f, _s, _n, 0)
static void cpu_pre_save(void *opaque)
{
PowerPCCPU *cpu = opaque;
CPUPPCState *env = &cpu->env;
int i;
env->spr[SPR_LR] = env->lr;
env->spr[SPR_CTR] = env->ctr;
env->spr[SPR_XER] = env->xer;
#if defined(TARGET_PPC64)
env->spr[SPR_CFAR] = env->cfar;
#endif
env->spr[SPR_BOOKE_SPEFSCR] = env->spe_fscr;
for (i = 0; (i < 4) && (i < env->nb_BATs); i++) {
env->spr[SPR_DBAT0U + 2*i] = env->DBAT[0][i];
env->spr[SPR_DBAT0U + 2*i + 1] = env->DBAT[1][i];
env->spr[SPR_IBAT0U + 2*i] = env->IBAT[0][i];
env->spr[SPR_IBAT0U + 2*i + 1] = env->IBAT[1][i];
}
for (i = 0; (i < 4) && ((i+4) < env->nb_BATs); i++) {
env->spr[SPR_DBAT4U + 2*i] = env->DBAT[0][i+4];
env->spr[SPR_DBAT4U + 2*i + 1] = env->DBAT[1][i+4];
env->spr[SPR_IBAT4U + 2*i] = env->IBAT[0][i+4];
env->spr[SPR_IBAT4U + 2*i + 1] = env->IBAT[1][i+4];
}
}
static int cpu_post_load(void *opaque, int version_id)
{
PowerPCCPU *cpu = opaque;
CPUPPCState *env = &cpu->env;
int i;
/*
* We always ignore the source PVR. The user or management
* software has to take care of running QEMU in a compatible mode.
*/
env->spr[SPR_PVR] = env->spr_cb[SPR_PVR].default_value;
env->lr = env->spr[SPR_LR];
env->ctr = env->spr[SPR_CTR];
env->xer = env->spr[SPR_XER];
#if defined(TARGET_PPC64)
env->cfar = env->spr[SPR_CFAR];
#endif
env->spe_fscr = env->spr[SPR_BOOKE_SPEFSCR];
for (i = 0; (i < 4) && (i < env->nb_BATs); i++) {
env->DBAT[0][i] = env->spr[SPR_DBAT0U + 2*i];
env->DBAT[1][i] = env->spr[SPR_DBAT0U + 2*i + 1];
env->IBAT[0][i] = env->spr[SPR_IBAT0U + 2*i];
env->IBAT[1][i] = env->spr[SPR_IBAT0U + 2*i + 1];
}
for (i = 0; (i < 4) && ((i+4) < env->nb_BATs); i++) {
env->DBAT[0][i+4] = env->spr[SPR_DBAT4U + 2*i];
env->DBAT[1][i+4] = env->spr[SPR_DBAT4U + 2*i + 1];
env->IBAT[0][i+4] = env->spr[SPR_IBAT4U + 2*i];
env->IBAT[1][i+4] = env->spr[SPR_IBAT4U + 2*i + 1];
}
if (!env->external_htab) {
/* Restore htab_base and htab_mask variables */
ppc_store_sdr1(env, env->spr[SPR_SDR1]);
}
hreg_compute_hflags(env);
hreg_compute_mem_idx(env);
return 0;
}
static bool fpu_needed(void *opaque)
{
PowerPCCPU *cpu = opaque;
return (cpu->env.insns_flags & PPC_FLOAT);
}
static const VMStateDescription vmstate_fpu = {
.name = "cpu/fpu",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_FLOAT64_ARRAY(env.fpr, PowerPCCPU, 32),
VMSTATE_UINTTL(env.fpscr, PowerPCCPU),
VMSTATE_END_OF_LIST()
},
};
static bool altivec_needed(void *opaque)
{
PowerPCCPU *cpu = opaque;
return (cpu->env.insns_flags & PPC_ALTIVEC);
}
static const VMStateDescription vmstate_altivec = {
.name = "cpu/altivec",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_AVR_ARRAY(env.avr, PowerPCCPU, 32),
VMSTATE_UINT32(env.vscr, PowerPCCPU),
VMSTATE_END_OF_LIST()
},
};
static bool vsx_needed(void *opaque)
{
PowerPCCPU *cpu = opaque;
return (cpu->env.insns_flags2 & PPC2_VSX);
}
static const VMStateDescription vmstate_vsx = {
.name = "cpu/vsx",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT64_ARRAY(env.vsr, PowerPCCPU, 32),
VMSTATE_END_OF_LIST()
},
};
static bool sr_needed(void *opaque)
{
#ifdef TARGET_PPC64
PowerPCCPU *cpu = opaque;
return !(cpu->env.mmu_model & POWERPC_MMU_64);
#else
return true;
#endif
}
static const VMStateDescription vmstate_sr = {
.name = "cpu/sr",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINTTL_ARRAY(env.sr, PowerPCCPU, 32),
VMSTATE_END_OF_LIST()
},
};
#ifdef TARGET_PPC64
static int get_slbe(QEMUFile *f, void *pv, size_t size)
{
ppc_slb_t *v = pv;
v->esid = qemu_get_be64(f);
v->vsid = qemu_get_be64(f);
return 0;
}
static void put_slbe(QEMUFile *f, void *pv, size_t size)
{
ppc_slb_t *v = pv;
qemu_put_be64(f, v->esid);
qemu_put_be64(f, v->vsid);
}
static const VMStateInfo vmstate_info_slbe = {
.name = "slbe",
.get = get_slbe,
.put = put_slbe,
};
#define VMSTATE_SLB_ARRAY_V(_f, _s, _n, _v) \
VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_slbe, ppc_slb_t)
#define VMSTATE_SLB_ARRAY(_f, _s, _n) \
VMSTATE_SLB_ARRAY_V(_f, _s, _n, 0)
static bool slb_needed(void *opaque)
{
PowerPCCPU *cpu = opaque;
/* We don't support any of the old segment table based 64-bit CPUs */
return (cpu->env.mmu_model & POWERPC_MMU_64);
}
static const VMStateDescription vmstate_slb = {
.name = "cpu/slb",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_INT32_EQUAL(env.slb_nr, PowerPCCPU),
VMSTATE_SLB_ARRAY(env.slb, PowerPCCPU, MAX_SLB_ENTRIES),
VMSTATE_END_OF_LIST()
}
};
#endif /* TARGET_PPC64 */
static const VMStateDescription vmstate_tlb6xx_entry = {
.name = "cpu/tlb6xx_entry",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINTTL(pte0, ppc6xx_tlb_t),
VMSTATE_UINTTL(pte1, ppc6xx_tlb_t),
VMSTATE_UINTTL(EPN, ppc6xx_tlb_t),
VMSTATE_END_OF_LIST()
},
};
static bool tlb6xx_needed(void *opaque)
{
PowerPCCPU *cpu = opaque;
CPUPPCState *env = &cpu->env;
return env->nb_tlb && (env->tlb_type == TLB_6XX);
}
static const VMStateDescription vmstate_tlb6xx = {
.name = "cpu/tlb6xx",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_INT32_EQUAL(env.nb_tlb, PowerPCCPU),
VMSTATE_STRUCT_VARRAY_POINTER_INT32(env.tlb.tlb6, PowerPCCPU,
env.nb_tlb,
vmstate_tlb6xx_entry,
ppc6xx_tlb_t),
VMSTATE_UINTTL_ARRAY(env.tgpr, PowerPCCPU, 4),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_tlbemb_entry = {
.name = "cpu/tlbemb_entry",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT64(RPN, ppcemb_tlb_t),
VMSTATE_UINTTL(EPN, ppcemb_tlb_t),
VMSTATE_UINTTL(PID, ppcemb_tlb_t),
VMSTATE_UINTTL(size, ppcemb_tlb_t),
VMSTATE_UINT32(prot, ppcemb_tlb_t),
VMSTATE_UINT32(attr, ppcemb_tlb_t),
VMSTATE_END_OF_LIST()
},
};
static bool tlbemb_needed(void *opaque)
{
PowerPCCPU *cpu = opaque;
CPUPPCState *env = &cpu->env;
return env->nb_tlb && (env->tlb_type == TLB_EMB);
}
static bool pbr403_needed(void *opaque)
{
PowerPCCPU *cpu = opaque;
uint32_t pvr = cpu->env.spr[SPR_PVR];
return (pvr & 0xffff0000) == 0x00200000;
}
static const VMStateDescription vmstate_pbr403 = {
.name = "cpu/pbr403",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINTTL_ARRAY(env.pb, PowerPCCPU, 4),
VMSTATE_END_OF_LIST()
},
};
static const VMStateDescription vmstate_tlbemb = {
.name = "cpu/tlb6xx",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_INT32_EQUAL(env.nb_tlb, PowerPCCPU),
VMSTATE_STRUCT_VARRAY_POINTER_INT32(env.tlb.tlbe, PowerPCCPU,
env.nb_tlb,
vmstate_tlbemb_entry,
ppcemb_tlb_t),
/* 403 protection registers */
VMSTATE_END_OF_LIST()
},
.subsections = (VMStateSubsection []) {
{
.vmsd = &vmstate_pbr403,
.needed = pbr403_needed,
} , {
/* empty */
}
}
};
static const VMStateDescription vmstate_tlbmas_entry = {
.name = "cpu/tlbmas_entry",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(mas8, ppcmas_tlb_t),
VMSTATE_UINT32(mas1, ppcmas_tlb_t),
VMSTATE_UINT64(mas2, ppcmas_tlb_t),
VMSTATE_UINT64(mas7_3, ppcmas_tlb_t),
VMSTATE_END_OF_LIST()
},
};
static bool tlbmas_needed(void *opaque)
{
PowerPCCPU *cpu = opaque;
CPUPPCState *env = &cpu->env;
return env->nb_tlb && (env->tlb_type == TLB_MAS);
}
static const VMStateDescription vmstate_tlbmas = {
.name = "cpu/tlbmas",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_INT32_EQUAL(env.nb_tlb, PowerPCCPU),
VMSTATE_STRUCT_VARRAY_POINTER_INT32(env.tlb.tlbm, PowerPCCPU,
env.nb_tlb,
vmstate_tlbmas_entry,
ppcmas_tlb_t),
VMSTATE_END_OF_LIST()
}
};
const VMStateDescription vmstate_ppc_cpu = {
.name = "cpu",
.version_id = 5,
.minimum_version_id = 5,
.minimum_version_id_old = 4,
.load_state_old = cpu_load_old,
.pre_save = cpu_pre_save,
.post_load = cpu_post_load,
.fields = (VMStateField[]) {
VMSTATE_UNUSED(sizeof(target_ulong)), /* was _EQUAL(env.spr[SPR_PVR]) */
/* User mode architected state */
VMSTATE_UINTTL_ARRAY(env.gpr, PowerPCCPU, 32),
#if !defined(TARGET_PPC64)
VMSTATE_UINTTL_ARRAY(env.gprh, PowerPCCPU, 32),
#endif
VMSTATE_UINT32_ARRAY(env.crf, PowerPCCPU, 8),
VMSTATE_UINTTL(env.nip, PowerPCCPU),
/* SPRs */
VMSTATE_UINTTL_ARRAY(env.spr, PowerPCCPU, 1024),
VMSTATE_UINT64(env.spe_acc, PowerPCCPU),
/* Reservation */
VMSTATE_UINTTL(env.reserve_addr, PowerPCCPU),
/* Supervisor mode architected state */
VMSTATE_UINTTL(env.msr, PowerPCCPU),
/* Internal state */
VMSTATE_UINTTL(env.hflags_nmsr, PowerPCCPU),
/* FIXME: access_type? */
/* Sanity checking */
VMSTATE_UINTTL_EQUAL(env.msr_mask, PowerPCCPU),
VMSTATE_UINT64_EQUAL(env.insns_flags, PowerPCCPU),
VMSTATE_UINT64_EQUAL(env.insns_flags2, PowerPCCPU),
VMSTATE_UINT32_EQUAL(env.nb_BATs, PowerPCCPU),
VMSTATE_END_OF_LIST()
},
.subsections = (VMStateSubsection []) {
{
.vmsd = &vmstate_fpu,
.needed = fpu_needed,
} , {
.vmsd = &vmstate_altivec,
.needed = altivec_needed,
} , {
.vmsd = &vmstate_vsx,
.needed = vsx_needed,
} , {
.vmsd = &vmstate_sr,
.needed = sr_needed,
} , {
#ifdef TARGET_PPC64
.vmsd = &vmstate_slb,
.needed = slb_needed,
} , {
#endif /* TARGET_PPC64 */
.vmsd = &vmstate_tlb6xx,
.needed = tlb6xx_needed,
} , {
.vmsd = &vmstate_tlbemb,
.needed = tlbemb_needed,
} , {
.vmsd = &vmstate_tlbmas,
.needed = tlbmas_needed,
} , {
/* empty */
}
}
};