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qemu-e2k/target/s390x/machine.c
Dr. David Alan Gilbert 44b1ff319c migration: pre_save return int 
Modify the pre_save method on VMStateDescription to return an int
rather than void so that it potentially can fail.

Changed zillions of devices to make them return 0; the only
case I've made it return non-0 is hw/intc/s390_flic_kvm.c that already
had an error_report/return case.

Note: If you add an error exit in your pre_save you must emit
an error_report to say why.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20170925112917.21340-2-dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2017-09-27 11:35:59 +01:00

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/*
* S390x machine definitions and functions
*
* Copyright IBM Corp. 2014
*
* Authors:
* Thomas Huth <thuth@linux.vnet.ibm.com>
* Christian Borntraeger <borntraeger@de.ibm.com>
* Jason J. Herne <jjherne@us.ibm.com>
*
* This work is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation; either version 2 of the License,
* or (at your option) any later version.
*/
#include "qemu/osdep.h"
#include "hw/hw.h"
#include "cpu.h"
#include "internal.h"
#include "kvm_s390x.h"
#include "sysemu/kvm.h"
static int cpu_post_load(void *opaque, int version_id)
{
S390CPU *cpu = opaque;
/*
* As the cpu state is pushed to kvm via kvm_set_mp_state rather
* than via cpu_synchronize_state, we need update kvm here.
*/
if (kvm_enabled()) {
kvm_s390_set_cpu_state(cpu, cpu->env.cpu_state);
return kvm_s390_vcpu_interrupt_post_load(cpu);
}
return 0;
}
static int cpu_pre_save(void *opaque)
{
S390CPU *cpu = opaque;
if (kvm_enabled()) {
kvm_s390_vcpu_interrupt_pre_save(cpu);
}
return 0;
}
static inline bool fpu_needed(void *opaque)
{
/* This looks odd, but we might want to NOT transfer fprs in the future */
return true;
}
static const VMStateDescription vmstate_fpu = {
.name = "cpu/fpu",
.version_id = 1,
.minimum_version_id = 1,
.needed = fpu_needed,
.fields = (VMStateField[]) {
VMSTATE_UINT64(env.vregs[0][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[1][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[2][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[3][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[4][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[5][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[6][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[7][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[8][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[9][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[10][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[11][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[12][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[13][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[14][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[15][0].ll, S390CPU),
VMSTATE_UINT32(env.fpc, S390CPU),
VMSTATE_END_OF_LIST()
}
};
static bool vregs_needed(void *opaque)
{
return s390_has_feat(S390_FEAT_VECTOR);
}
static const VMStateDescription vmstate_vregs = {
.name = "cpu/vregs",
.version_id = 1,
.minimum_version_id = 1,
.needed = vregs_needed,
.fields = (VMStateField[]) {
/* vregs[0][0] -> vregs[15][0] and fregs are overlays */
VMSTATE_UINT64(env.vregs[16][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[17][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[18][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[19][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[20][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[21][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[22][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[23][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[24][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[25][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[26][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[27][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[28][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[29][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[30][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[31][0].ll, S390CPU),
VMSTATE_UINT64(env.vregs[0][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[1][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[2][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[3][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[4][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[5][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[6][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[7][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[8][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[9][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[10][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[11][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[12][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[13][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[14][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[15][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[16][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[17][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[18][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[19][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[20][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[21][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[22][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[23][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[24][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[25][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[26][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[27][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[28][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[29][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[30][1].ll, S390CPU),
VMSTATE_UINT64(env.vregs[31][1].ll, S390CPU),
VMSTATE_END_OF_LIST()
}
};
static bool riccb_needed(void *opaque)
{
return s390_has_feat(S390_FEAT_RUNTIME_INSTRUMENTATION);
}
const VMStateDescription vmstate_riccb = {
.name = "cpu/riccb",
.version_id = 1,
.minimum_version_id = 1,
.needed = riccb_needed,
.fields = (VMStateField[]) {
VMSTATE_UINT8_ARRAY(env.riccb, S390CPU, 64),
VMSTATE_END_OF_LIST()
}
};
static bool exval_needed(void *opaque)
{
S390CPU *cpu = opaque;
return cpu->env.ex_value != 0;
}
const VMStateDescription vmstate_exval = {
.name = "cpu/exval",
.version_id = 1,
.minimum_version_id = 1,
.needed = exval_needed,
.fields = (VMStateField[]) {
VMSTATE_UINT64(env.ex_value, S390CPU),
VMSTATE_END_OF_LIST()
}
};
static bool gscb_needed(void *opaque)
{
return kvm_s390_get_gs();
}
const VMStateDescription vmstate_gscb = {
.name = "cpu/gscb",
.version_id = 1,
.minimum_version_id = 1,
.needed = gscb_needed,
.fields = (VMStateField[]) {
VMSTATE_UINT64_ARRAY(env.gscb, S390CPU, 4),
VMSTATE_END_OF_LIST()
}
};
const VMStateDescription vmstate_s390_cpu = {
.name = "cpu",
.post_load = cpu_post_load,
.pre_save = cpu_pre_save,
.version_id = 4,
.minimum_version_id = 3,
.fields = (VMStateField[]) {
VMSTATE_UINT64_ARRAY(env.regs, S390CPU, 16),
VMSTATE_UINT64(env.psw.mask, S390CPU),
VMSTATE_UINT64(env.psw.addr, S390CPU),
VMSTATE_UINT64(env.psa, S390CPU),
VMSTATE_UINT32(env.todpr, S390CPU),
VMSTATE_UINT64(env.pfault_token, S390CPU),
VMSTATE_UINT64(env.pfault_compare, S390CPU),
VMSTATE_UINT64(env.pfault_select, S390CPU),
VMSTATE_UINT64(env.cputm, S390CPU),
VMSTATE_UINT64(env.ckc, S390CPU),
VMSTATE_UINT64(env.gbea, S390CPU),
VMSTATE_UINT64(env.pp, S390CPU),
VMSTATE_UINT32_ARRAY(env.aregs, S390CPU, 16),
VMSTATE_UINT64_ARRAY(env.cregs, S390CPU, 16),
VMSTATE_UINT8(env.cpu_state, S390CPU),
VMSTATE_UINT8(env.sigp_order, S390CPU),
VMSTATE_UINT32_V(irqstate_saved_size, S390CPU, 4),
VMSTATE_VBUFFER_UINT32(irqstate, S390CPU, 4, NULL,
irqstate_saved_size),
VMSTATE_END_OF_LIST()
},
.subsections = (const VMStateDescription*[]) {
&vmstate_fpu,
&vmstate_vregs,
&vmstate_riccb,
&vmstate_exval,
&vmstate_gscb,
NULL
},
};
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