#include "helper_regs.h"
#include "mmu-hash64.h"
#include "migration/cpu.h"
+#include "qapi/error.h"
+#include "kvm_ppc.h"
+#include "exec/helper-proto.h"
static int cpu_load_old(QEMUFile *f, void *opaque, int version_id)
{
CPUPPCState *env = &cpu->env;
unsigned int i, j;
target_ulong sdr1;
- uint32_t fpscr;
+ uint32_t fpscr, vscr;
+#if defined(TARGET_PPC64)
+ int32_t slb_nr;
+#endif
target_ulong xer;
for (i = 0; i < 32; i++)
uint64_t l;
} u;
u.l = qemu_get_be64(f);
- env->fpr[i] = u.d;
+ *cpu_fpr_ptr(env, 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);
+ qemu_get_sbe32s(f, &slb_nr);
#endif
qemu_get_betls(f, &sdr1);
for (i = 0; i < 32; 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) {
+ if (!cpu->vhyp) {
ppc_store_sdr1(env, sdr1);
}
- qemu_get_be32s(f, &env->vscr);
+ qemu_get_be32s(f, &vscr);
+ helper_mtvscr(env, vscr);
qemu_get_be64s(f, &env->spe_acc);
qemu_get_be32s(f, &env->spe_fscr);
qemu_get_betls(f, &env->msr_mask);
return 0;
}
-static int get_avr(QEMUFile *f, void *pv, size_t size, VMStateField *field)
+static int get_avr(QEMUFile *f, void *pv, size_t size,
+ const VMStateField *field)
{
ppc_avr_t *v = pv;
return 0;
}
-static int put_avr(QEMUFile *f, void *pv, size_t size, VMStateField *field,
- QJSON *vmdesc)
+static int put_avr(QEMUFile *f, void *pv, size_t size,
+ const VMStateField *field, QJSON *vmdesc)
{
ppc_avr_t *v = pv;
};
#define VMSTATE_AVR_ARRAY_V(_f, _s, _n, _v) \
- VMSTATE_ARRAY(_f, _s, _n, _v, vmstate_info_avr, ppc_avr_t)
+ VMSTATE_SUB_ARRAY(_f, _s, 32, _n, _v, vmstate_info_avr, ppc_avr_t)
#define VMSTATE_AVR_ARRAY(_f, _s, _n) \
VMSTATE_AVR_ARRAY_V(_f, _s, _n, 0)
+static int get_fpr(QEMUFile *f, void *pv, size_t size,
+ const VMStateField *field)
+{
+ ppc_vsr_t *v = pv;
+
+ v->u64[0] = qemu_get_be64(f);
+
+ return 0;
+}
+
+static int put_fpr(QEMUFile *f, void *pv, size_t size,
+ const VMStateField *field, QJSON *vmdesc)
+{
+ ppc_vsr_t *v = pv;
+
+ qemu_put_be64(f, v->u64[0]);
+ return 0;
+}
+
+static const VMStateInfo vmstate_info_fpr = {
+ .name = "fpr",
+ .get = get_fpr,
+ .put = put_fpr,
+};
+
+#define VMSTATE_FPR_ARRAY_V(_f, _s, _n, _v) \
+ VMSTATE_SUB_ARRAY(_f, _s, 0, _n, _v, vmstate_info_fpr, ppc_vsr_t)
+
+#define VMSTATE_FPR_ARRAY(_f, _s, _n) \
+ VMSTATE_FPR_ARRAY_V(_f, _s, _n, 0)
+
+static int get_vsr(QEMUFile *f, void *pv, size_t size,
+ const VMStateField *field)
+{
+ ppc_vsr_t *v = pv;
+
+ v->u64[1] = qemu_get_be64(f);
+
+ return 0;
+}
+
+static int put_vsr(QEMUFile *f, void *pv, size_t size,
+ const VMStateField *field, QJSON *vmdesc)
+{
+ ppc_vsr_t *v = pv;
+
+ qemu_put_be64(f, v->u64[1]);
+ return 0;
+}
+
+static const VMStateInfo vmstate_info_vsr = {
+ .name = "vsr",
+ .get = get_vsr,
+ .put = put_vsr,
+};
+
+#define VMSTATE_VSR_ARRAY_V(_f, _s, _n, _v) \
+ VMSTATE_SUB_ARRAY(_f, _s, 0, _n, _v, vmstate_info_vsr, ppc_vsr_t)
+
+#define VMSTATE_VSR_ARRAY(_f, _s, _n) \
+ VMSTATE_VSR_ARRAY_V(_f, _s, _n, 0)
+
static bool cpu_pre_2_8_migration(void *opaque, int version_id)
{
PowerPCCPU *cpu = opaque;
return cpu->pre_2_8_migration;
}
-static void cpu_pre_save(void *opaque)
+#if defined(TARGET_PPC64)
+static bool cpu_pre_3_0_migration(void *opaque, int version_id)
+{
+ PowerPCCPU *cpu = opaque;
+
+ return cpu->pre_3_0_migration;
+}
+#endif
+
+static int cpu_pre_save(void *opaque)
{
PowerPCCPU *cpu = opaque;
CPUPPCState *env = &cpu->env;
/* Hacks for migration compatibility between 2.6, 2.7 & 2.8 */
if (cpu->pre_2_8_migration) {
- cpu->mig_msr_mask = env->msr_mask;
+ /* Mask out bits that got added to msr_mask since the versions
+ * which stupidly included it in the migration stream. */
+ target_ulong metamask = 0
+#if defined(TARGET_PPC64)
+ | (1ULL << MSR_TS0)
+ | (1ULL << MSR_TS1)
+#endif
+ ;
+ cpu->mig_msr_mask = env->msr_mask & ~metamask;
cpu->mig_insns_flags = env->insns_flags & insns_compat_mask;
+ /* CPU models supported by old machines all have PPC_MEM_TLBIE,
+ * so we set it unconditionally to allow backward migration from
+ * a POWER9 host to a POWER8 host.
+ */
+ cpu->mig_insns_flags |= PPC_MEM_TLBIE;
cpu->mig_insns_flags2 = env->insns_flags2 & insns_compat_mask2;
cpu->mig_nb_BATs = env->nb_BATs;
}
+ if (cpu->pre_3_0_migration) {
+ if (cpu->hash64_opts) {
+ cpu->mig_slb_nr = cpu->hash64_opts->slb_size;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * Determine if a given PVR is a "close enough" match to the CPU
+ * object. For TCG and KVM PR it would probably be sufficient to
+ * require an exact PVR match. However for KVM HV the user is
+ * restricted to a PVR exactly matching the host CPU. The correct way
+ * to handle this is to put the guest into an architected
+ * compatibility mode. However, to allow a more forgiving transition
+ * and migration from before this was widely done, we allow migration
+ * between sufficiently similar PVRs, as determined by the CPU class's
+ * pvr_match() hook.
+ */
+static bool pvr_match(PowerPCCPU *cpu, uint32_t pvr)
+{
+ PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
+
+ if (pvr == pcc->pvr) {
+ return true;
+ }
+ return pcc->pvr_match(pcc, pvr);
}
static int cpu_post_load(void *opaque, int version_id)
target_ulong msr;
/*
- * We always ignore the source PVR. The user or management
- * software has to take care of running QEMU in a compatible mode.
+ * If we're operating in compat mode, we should be ok as long as
+ * the destination supports the same compatiblity mode.
+ *
+ * Otherwise, however, we require that the destination has exactly
+ * the same CPU model as the source.
*/
- env->spr[SPR_PVR] = env->spr_cb[SPR_PVR].default_value;
+
+#if defined(TARGET_PPC64)
+ if (cpu->compat_pvr) {
+ uint32_t compat_pvr = cpu->compat_pvr;
+ Error *local_err = NULL;
+
+ cpu->compat_pvr = 0;
+ ppc_set_compat(cpu, compat_pvr, &local_err);
+ if (local_err) {
+ error_report_err(local_err);
+ return -1;
+ }
+ } else
+#endif
+ {
+ if (!pvr_match(cpu, env->spr[SPR_PVR])) {
+ return -1;
+ }
+ }
+
+ /*
+ * If we're running with KVM HV, there is a chance that the guest
+ * is running with KVM HV and its kernel does not have the
+ * capability of dealing with a different PVR other than this
+ * exact host PVR in KVM_SET_SREGS. If that happens, the
+ * guest freezes after migration.
+ *
+ * The function kvmppc_pvr_workaround_required does this verification
+ * by first checking if the kernel has the cap, returning true immediately
+ * if that is the case. Otherwise, it checks if we're running in KVM PR.
+ * If the guest kernel does not have the cap and we're not running KVM-PR
+ * (so, it is running KVM-HV), we need to ensure that KVM_SET_SREGS will
+ * receive the PVR it expects as a workaround.
+ *
+ */
+#if defined(CONFIG_KVM)
+ if (kvmppc_pvr_workaround_required(cpu)) {
+ env->spr[SPR_PVR] = env->spr_cb[SPR_PVR].default_value;
+ }
+#endif
+
env->lr = env->spr[SPR_LR];
env->ctr = env->spr[SPR_CTR];
cpu_write_xer(env, env->spr[SPR_XER]);
env->IBAT[1][i+4] = env->spr[SPR_IBAT4U + 2*i + 1];
}
- if (!env->external_htab) {
- /* Restore htab_base and htab_mask variables */
+ if (!cpu->vhyp) {
ppc_store_sdr1(env, env->spr[SPR_SDR1]);
}
- /* Invalidate all msr bits except MSR_TGPR/MSR_HVB before restoring */
+ /* Invalidate all supported msr bits except MSR_TGPR/MSR_HVB before restoring */
msr = env->msr;
- env->msr ^= ~((1ULL << MSR_TGPR) | MSR_HVB);
+ env->msr ^= env->msr_mask & ~((1ULL << MSR_TGPR) | MSR_HVB);
ppc_store_msr(env, msr);
hreg_compute_mem_idx(env);
.minimum_version_id = 1,
.needed = fpu_needed,
.fields = (VMStateField[]) {
- VMSTATE_FLOAT64_ARRAY(env.fpr, PowerPCCPU, 32),
+ VMSTATE_FPR_ARRAY(env.vsr, PowerPCCPU, 32),
VMSTATE_UINTTL(env.fpscr, PowerPCCPU),
VMSTATE_END_OF_LIST()
},
return (cpu->env.insns_flags & PPC_ALTIVEC);
}
+static int get_vscr(QEMUFile *f, void *opaque, size_t size,
+ const VMStateField *field)
+{
+ PowerPCCPU *cpu = opaque;
+ helper_mtvscr(&cpu->env, qemu_get_be32(f));
+ return 0;
+}
+
+static int put_vscr(QEMUFile *f, void *opaque, size_t size,
+ const VMStateField *field, QJSON *vmdesc)
+{
+ PowerPCCPU *cpu = opaque;
+ qemu_put_be32(f, helper_mfvscr(&cpu->env));
+ return 0;
+}
+
+static const VMStateInfo vmstate_vscr = {
+ .name = "cpu/altivec/vscr",
+ .get = get_vscr,
+ .put = put_vscr,
+};
+
static const VMStateDescription vmstate_altivec = {
.name = "cpu/altivec",
.version_id = 1,
.minimum_version_id = 1,
.needed = altivec_needed,
.fields = (VMStateField[]) {
- VMSTATE_AVR_ARRAY(env.avr, PowerPCCPU, 32),
- VMSTATE_UINT32(env.vscr, PowerPCCPU),
+ VMSTATE_AVR_ARRAY(env.vsr, PowerPCCPU, 32),
+ /*
+ * Save the architecture value of the vscr, not the internally
+ * expanded version. Since this architecture value does not
+ * exist in memory to be stored, this requires a but of hoop
+ * jumping. We want OFFSET=0 so that we effectively pass CPU
+ * to the helper functions.
+ */
+ {
+ .name = "vscr",
+ .version_id = 0,
+ .size = sizeof(uint32_t),
+ .info = &vmstate_vscr,
+ .flags = VMS_SINGLE,
+ .offset = 0
+ },
VMSTATE_END_OF_LIST()
},
};
.minimum_version_id = 1,
.needed = vsx_needed,
.fields = (VMStateField[]) {
- VMSTATE_UINT64_ARRAY(env.vsr, PowerPCCPU, 32),
+ VMSTATE_VSR_ARRAY(env.vsr, PowerPCCPU, 32),
VMSTATE_END_OF_LIST()
},
};
};
#ifdef TARGET_PPC64
-static int get_slbe(QEMUFile *f, void *pv, size_t size, VMStateField *field)
+static int get_slbe(QEMUFile *f, void *pv, size_t size,
+ const VMStateField *field)
{
ppc_slb_t *v = pv;
return 0;
}
-static int put_slbe(QEMUFile *f, void *pv, size_t size, VMStateField *field,
- QJSON *vmdesc)
+static int put_slbe(QEMUFile *f, void *pv, size_t size,
+ const VMStateField *field, QJSON *vmdesc)
{
ppc_slb_t *v = pv;
/* We've pulled in the raw esid and vsid values from the migration
* stream, but we need to recompute the page size pointers */
- for (i = 0; i < env->slb_nr; i++) {
+ for (i = 0; i < cpu->hash64_opts->slb_size; i++) {
if (ppc_store_slb(cpu, i, env->slb[i].esid, env->slb[i].vsid) < 0) {
/* Migration source had bad values in its SLB */
return -1;
.needed = slb_needed,
.post_load = slb_post_load,
.fields = (VMStateField[]) {
- VMSTATE_INT32_EQUAL(env.slb_nr, PowerPCCPU),
+ VMSTATE_INT32_TEST(mig_slb_nr, PowerPCCPU, cpu_pre_3_0_migration),
VMSTATE_SLB_ARRAY(env.slb, PowerPCCPU, MAX_SLB_ENTRIES),
VMSTATE_END_OF_LIST()
}
.minimum_version_id = 1,
.needed = tlb6xx_needed,
.fields = (VMStateField[]) {
- VMSTATE_INT32_EQUAL(env.nb_tlb, PowerPCCPU),
+ VMSTATE_INT32_EQUAL(env.nb_tlb, PowerPCCPU, NULL),
VMSTATE_STRUCT_VARRAY_POINTER_INT32(env.tlb.tlb6, PowerPCCPU,
env.nb_tlb,
vmstate_tlb6xx_entry,
.minimum_version_id = 1,
.needed = tlbemb_needed,
.fields = (VMStateField[]) {
- VMSTATE_INT32_EQUAL(env.nb_tlb, PowerPCCPU),
+ VMSTATE_INT32_EQUAL(env.nb_tlb, PowerPCCPU, NULL),
VMSTATE_STRUCT_VARRAY_POINTER_INT32(env.tlb.tlbe, PowerPCCPU,
env.nb_tlb,
vmstate_tlbemb_entry,
.minimum_version_id = 1,
.needed = tlbmas_needed,
.fields = (VMStateField[]) {
- VMSTATE_INT32_EQUAL(env.nb_tlb, PowerPCCPU),
+ VMSTATE_INT32_EQUAL(env.nb_tlb, PowerPCCPU, NULL),
VMSTATE_STRUCT_VARRAY_POINTER_INT32(env.tlb.tlbm, PowerPCCPU,
env.nb_tlb,
vmstate_tlbmas_entry,
}
};
+static bool compat_needed(void *opaque)
+{
+ PowerPCCPU *cpu = opaque;
+
+ assert(!(cpu->compat_pvr && !cpu->vhyp));
+ return !cpu->pre_2_10_migration && cpu->compat_pvr != 0;
+}
+
+static const VMStateDescription vmstate_compat = {
+ .name = "cpu/compat",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .needed = compat_needed,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(compat_pvr, PowerPCCPU),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
const VMStateDescription vmstate_ppc_cpu = {
.name = "cpu",
.version_id = 5,
&vmstate_tlb6xx,
&vmstate_tlbemb,
&vmstate_tlbmas,
+ &vmstate_compat,
NULL
}
};
projects / qemu.git / blobdiff