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qemu/target-s390x/machine.c
David Hildenbrand 7c72ac49ae s390x/cpumodel: let the CPU model handle feature checks 
If we have certain features enabled, we have to migrate additional state
(e.g. vector registers or runtime-instrumentation registers). Let the
CPU model control that unless we have no "host" CPU model in the KVM
case. This will later on be the case for compatibility machines, so
migration from QEMU versions without the CPU model will still work.

Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Message-Id: <20160905085244.99980-12-dahi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2016-09-06 17:06:50 +02:00

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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 "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 void cpu_pre_save(void *opaque)
{
S390CPU *cpu = opaque;
if (kvm_enabled()) {
kvm_s390_vcpu_interrupt_pre_save(cpu);
}
}
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()
}
};
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, 0,
irqstate_saved_size),
VMSTATE_END_OF_LIST()
},
.subsections = (const VMStateDescription*[]) {
&vmstate_fpu,
&vmstate_vregs,
&vmstate_riccb,
NULL
},
};
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