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s390x/migration: Storage attributes device
Storage attributes device, like we have for storage keys. Signed-off-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
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/* | ||
* s390 storage attributes device -- KVM object | ||
* | ||
* Copyright 2016 IBM Corp. | ||
* Author(s): Claudio Imbrenda <imbrenda@linux.vnet.ibm.com> | ||
* | ||
* This work is licensed under the terms of the GNU GPL, version 2 or (at | ||
* your option) any later version. See the COPYING file in the top-level | ||
* directory. | ||
*/ | ||
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#include "qemu/osdep.h" | ||
#include "hw/boards.h" | ||
#include "migration/qemu-file.h" | ||
#include "hw/s390x/storage-attributes.h" | ||
#include "qemu/error-report.h" | ||
#include "sysemu/kvm.h" | ||
#include "exec/ram_addr.h" | ||
#include "cpu.h" | ||
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Object *kvm_s390_stattrib_create(void) | ||
{ | ||
if (kvm_enabled() && | ||
kvm_check_extension(kvm_state, KVM_CAP_S390_CMMA_MIGRATION)) { | ||
return object_new(TYPE_KVM_S390_STATTRIB); | ||
} | ||
return NULL; | ||
} | ||
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static void kvm_s390_stattrib_instance_init(Object *obj) | ||
{ | ||
KVMS390StAttribState *sas = KVM_S390_STATTRIB(obj); | ||
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sas->still_dirty = 0; | ||
} | ||
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static int kvm_s390_stattrib_read_helper(S390StAttribState *sa, | ||
uint64_t *start_gfn, | ||
uint32_t count, | ||
uint8_t *values, | ||
uint32_t flags) | ||
{ | ||
KVMS390StAttribState *sas = KVM_S390_STATTRIB(sa); | ||
int r; | ||
struct kvm_s390_cmma_log clog = { | ||
.values = (uint64_t)values, | ||
.start_gfn = *start_gfn, | ||
.count = count, | ||
.flags = flags, | ||
}; | ||
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r = kvm_vm_ioctl(kvm_state, KVM_S390_GET_CMMA_BITS, &clog); | ||
if (r < 0) { | ||
error_report("KVM_S390_GET_CMMA_BITS failed: %s", strerror(-r)); | ||
return r; | ||
} | ||
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*start_gfn = clog.start_gfn; | ||
sas->still_dirty = clog.remaining; | ||
return clog.count; | ||
} | ||
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static int kvm_s390_stattrib_get_stattr(S390StAttribState *sa, | ||
uint64_t *start_gfn, | ||
uint32_t count, | ||
uint8_t *values) | ||
{ | ||
return kvm_s390_stattrib_read_helper(sa, start_gfn, count, values, 0); | ||
} | ||
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static int kvm_s390_stattrib_peek_stattr(S390StAttribState *sa, | ||
uint64_t start_gfn, | ||
uint32_t count, | ||
uint8_t *values) | ||
{ | ||
return kvm_s390_stattrib_read_helper(sa, &start_gfn, count, values, | ||
KVM_S390_CMMA_PEEK); | ||
} | ||
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static int kvm_s390_stattrib_set_stattr(S390StAttribState *sa, | ||
uint64_t start_gfn, | ||
uint32_t count, | ||
uint8_t *values) | ||
{ | ||
KVMS390StAttribState *sas = KVM_S390_STATTRIB(sa); | ||
MachineState *machine = MACHINE(qdev_get_machine()); | ||
unsigned long max = machine->maxram_size / TARGET_PAGE_SIZE; | ||
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if (start_gfn + count > max) { | ||
error_report("Out of memory bounds when setting storage attributes"); | ||
return -1; | ||
} | ||
if (!sas->incoming_buffer) { | ||
sas->incoming_buffer = g_malloc0(max); | ||
} | ||
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memcpy(sas->incoming_buffer + start_gfn, values, count); | ||
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return 0; | ||
} | ||
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static void kvm_s390_stattrib_synchronize(S390StAttribState *sa) | ||
{ | ||
KVMS390StAttribState *sas = KVM_S390_STATTRIB(sa); | ||
MachineState *machine = MACHINE(qdev_get_machine()); | ||
unsigned long max = machine->maxram_size / TARGET_PAGE_SIZE; | ||
unsigned long cx, len = 1 << 19; | ||
int r; | ||
struct kvm_s390_cmma_log clog = { | ||
.flags = 0, | ||
.mask = ~0ULL, | ||
}; | ||
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if (sas->incoming_buffer) { | ||
for (cx = 0; cx + len <= max; cx += len) { | ||
clog.start_gfn = cx; | ||
clog.count = len; | ||
clog.values = (uint64_t)(sas->incoming_buffer + cx * len); | ||
r = kvm_vm_ioctl(kvm_state, KVM_S390_SET_CMMA_BITS, &clog); | ||
if (r) { | ||
error_report("KVM_S390_SET_CMMA_BITS failed: %s", strerror(-r)); | ||
return; | ||
} | ||
} | ||
if (cx < max) { | ||
clog.start_gfn = cx; | ||
clog.count = max - cx; | ||
clog.values = (uint64_t)(sas->incoming_buffer + cx * len); | ||
r = kvm_vm_ioctl(kvm_state, KVM_S390_SET_CMMA_BITS, &clog); | ||
if (r) { | ||
error_report("KVM_S390_SET_CMMA_BITS failed: %s", strerror(-r)); | ||
} | ||
} | ||
g_free(sas->incoming_buffer); | ||
sas->incoming_buffer = NULL; | ||
} | ||
} | ||
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static int kvm_s390_stattrib_set_migrationmode(S390StAttribState *sa, bool val) | ||
{ | ||
struct kvm_device_attr attr = { | ||
.group = KVM_S390_VM_MIGRATION, | ||
.attr = val, | ||
.addr = 0, | ||
}; | ||
return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr); | ||
} | ||
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static long long kvm_s390_stattrib_get_dirtycount(S390StAttribState *sa) | ||
{ | ||
KVMS390StAttribState *sas = KVM_S390_STATTRIB(sa); | ||
uint8_t val[8]; | ||
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kvm_s390_stattrib_peek_stattr(sa, 0, 1, val); | ||
return sas->still_dirty; | ||
} | ||
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static int kvm_s390_stattrib_get_active(S390StAttribState *sa) | ||
{ | ||
return kvm_s390_cmma_active() && sa->migration_enabled; | ||
} | ||
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static void kvm_s390_stattrib_class_init(ObjectClass *oc, void *data) | ||
{ | ||
S390StAttribClass *sac = S390_STATTRIB_CLASS(oc); | ||
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sac->get_stattr = kvm_s390_stattrib_get_stattr; | ||
sac->peek_stattr = kvm_s390_stattrib_peek_stattr; | ||
sac->set_stattr = kvm_s390_stattrib_set_stattr; | ||
sac->set_migrationmode = kvm_s390_stattrib_set_migrationmode; | ||
sac->get_dirtycount = kvm_s390_stattrib_get_dirtycount; | ||
sac->synchronize = kvm_s390_stattrib_synchronize; | ||
sac->get_active = kvm_s390_stattrib_get_active; | ||
} | ||
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static const TypeInfo kvm_s390_stattrib_info = { | ||
.name = TYPE_KVM_S390_STATTRIB, | ||
.parent = TYPE_S390_STATTRIB, | ||
.instance_init = kvm_s390_stattrib_instance_init, | ||
.instance_size = sizeof(KVMS390StAttribState), | ||
.class_init = kvm_s390_stattrib_class_init, | ||
.class_size = sizeof(S390StAttribClass), | ||
}; | ||
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static void kvm_s390_stattrib_register_types(void) | ||
{ | ||
type_register_static(&kvm_s390_stattrib_info); | ||
} | ||
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type_init(kvm_s390_stattrib_register_types) |
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