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qemu/target/s390x/machine.c
Christian Borntraeger b073c87517 s390x/kvm: Handle bpb feature 
We need to handle the bpb control on reset and migration. Normally
stfle.82 is transparent (and the normal guest part works without
hypervisor activity). To prevent any issues we require full
host kernel support for this feature.

Cc: qemu-stable@nongnu.org
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-Id: <20180118085628.40798-3-borntraeger@de.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
[CH: 'Branch Prediction Blocking' -> 'Branch prediction blocking']
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-01-22 11:22:30 +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 s390_has_feat(S390_FEAT_GUARDED_STORAGE);
}
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()
}
};
static bool bpbc_needed(void *opaque)
{
return s390_has_feat(S390_FEAT_BPB);
}
const VMStateDescription vmstate_bpbc = {
.name = "cpu/bpbc",
.version_id = 1,
.minimum_version_id = 1,
.needed = bpbc_needed,
.fields = (VMStateField[]) {
VMSTATE_BOOL(env.bpbc, S390CPU),
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,
&vmstate_bpbc,
NULL
},
};
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