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>stable-2.10
Claudio Imbrenda
Christian Borntraeger
parent
3272f0e22f
commit
903fd80b03
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@ -13,5 +13,7 @@ obj-y += css-bridge.o
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obj-y += ccw-device.o
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obj-y += s390-pci-bus.o s390-pci-inst.o
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obj-y += s390-skeys.o
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obj-y += s390-stattrib.o
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obj-$(CONFIG_KVM) += s390-skeys-kvm.o
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obj-$(CONFIG_KVM) += s390-stattrib-kvm.o
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obj-y += s390-ccw.o
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@ -0,0 +1,190 @@
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/*
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* s390 storage attributes device -- KVM object
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*
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* Copyright 2016 IBM Corp.
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* Author(s): Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at
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* your option) any later version. See the COPYING file in the top-level
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* directory.
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*/
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#include "qemu/osdep.h"
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#include "hw/boards.h"
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#include "migration/qemu-file.h"
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#include "hw/s390x/storage-attributes.h"
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#include "qemu/error-report.h"
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#include "sysemu/kvm.h"
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#include "exec/ram_addr.h"
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#include "cpu.h"
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Object *kvm_s390_stattrib_create(void)
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{
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if (kvm_enabled() &&
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kvm_check_extension(kvm_state, KVM_CAP_S390_CMMA_MIGRATION)) {
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return object_new(TYPE_KVM_S390_STATTRIB);
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}
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return NULL;
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}
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static void kvm_s390_stattrib_instance_init(Object *obj)
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{
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KVMS390StAttribState *sas = KVM_S390_STATTRIB(obj);
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sas->still_dirty = 0;
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}
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static int kvm_s390_stattrib_read_helper(S390StAttribState *sa,
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uint64_t *start_gfn,
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uint32_t count,
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uint8_t *values,
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uint32_t flags)
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{
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KVMS390StAttribState *sas = KVM_S390_STATTRIB(sa);
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int r;
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struct kvm_s390_cmma_log clog = {
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.values = (uint64_t)values,
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.start_gfn = *start_gfn,
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.count = count,
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.flags = flags,
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};
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r = kvm_vm_ioctl(kvm_state, KVM_S390_GET_CMMA_BITS, &clog);
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if (r < 0) {
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error_report("KVM_S390_GET_CMMA_BITS failed: %s", strerror(-r));
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return r;
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}
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*start_gfn = clog.start_gfn;
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sas->still_dirty = clog.remaining;
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return clog.count;
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}
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static int kvm_s390_stattrib_get_stattr(S390StAttribState *sa,
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uint64_t *start_gfn,
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uint32_t count,
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uint8_t *values)
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{
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return kvm_s390_stattrib_read_helper(sa, start_gfn, count, values, 0);
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}
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static int kvm_s390_stattrib_peek_stattr(S390StAttribState *sa,
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uint64_t start_gfn,
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uint32_t count,
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uint8_t *values)
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{
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return kvm_s390_stattrib_read_helper(sa, &start_gfn, count, values,
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KVM_S390_CMMA_PEEK);
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}
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static int kvm_s390_stattrib_set_stattr(S390StAttribState *sa,
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uint64_t start_gfn,
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uint32_t count,
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uint8_t *values)
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{
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KVMS390StAttribState *sas = KVM_S390_STATTRIB(sa);
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MachineState *machine = MACHINE(qdev_get_machine());
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unsigned long max = machine->maxram_size / TARGET_PAGE_SIZE;
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if (start_gfn + count > max) {
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error_report("Out of memory bounds when setting storage attributes");
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return -1;
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}
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if (!sas->incoming_buffer) {
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sas->incoming_buffer = g_malloc0(max);
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}
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memcpy(sas->incoming_buffer + start_gfn, values, count);
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return 0;
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}
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static void kvm_s390_stattrib_synchronize(S390StAttribState *sa)
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{
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KVMS390StAttribState *sas = KVM_S390_STATTRIB(sa);
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MachineState *machine = MACHINE(qdev_get_machine());
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unsigned long max = machine->maxram_size / TARGET_PAGE_SIZE;
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unsigned long cx, len = 1 << 19;
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int r;
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struct kvm_s390_cmma_log clog = {
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.flags = 0,
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.mask = ~0ULL,
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};
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if (sas->incoming_buffer) {
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for (cx = 0; cx + len <= max; cx += len) {
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clog.start_gfn = cx;
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clog.count = len;
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clog.values = (uint64_t)(sas->incoming_buffer + cx * len);
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r = kvm_vm_ioctl(kvm_state, KVM_S390_SET_CMMA_BITS, &clog);
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if (r) {
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error_report("KVM_S390_SET_CMMA_BITS failed: %s", strerror(-r));
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return;
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}
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}
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if (cx < max) {
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clog.start_gfn = cx;
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clog.count = max - cx;
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clog.values = (uint64_t)(sas->incoming_buffer + cx * len);
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r = kvm_vm_ioctl(kvm_state, KVM_S390_SET_CMMA_BITS, &clog);
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if (r) {
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error_report("KVM_S390_SET_CMMA_BITS failed: %s", strerror(-r));
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}
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}
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g_free(sas->incoming_buffer);
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sas->incoming_buffer = NULL;
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}
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}
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static int kvm_s390_stattrib_set_migrationmode(S390StAttribState *sa, bool val)
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{
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struct kvm_device_attr attr = {
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.group = KVM_S390_VM_MIGRATION,
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.attr = val,
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.addr = 0,
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};
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return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr);
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}
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static long long kvm_s390_stattrib_get_dirtycount(S390StAttribState *sa)
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{
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KVMS390StAttribState *sas = KVM_S390_STATTRIB(sa);
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uint8_t val[8];
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kvm_s390_stattrib_peek_stattr(sa, 0, 1, val);
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return sas->still_dirty;
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}
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static int kvm_s390_stattrib_get_active(S390StAttribState *sa)
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{
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return kvm_s390_cmma_active() && sa->migration_enabled;
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}
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static void kvm_s390_stattrib_class_init(ObjectClass *oc, void *data)
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{
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S390StAttribClass *sac = S390_STATTRIB_CLASS(oc);
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sac->get_stattr = kvm_s390_stattrib_get_stattr;
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sac->peek_stattr = kvm_s390_stattrib_peek_stattr;
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sac->set_stattr = kvm_s390_stattrib_set_stattr;
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sac->set_migrationmode = kvm_s390_stattrib_set_migrationmode;
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sac->get_dirtycount = kvm_s390_stattrib_get_dirtycount;
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sac->synchronize = kvm_s390_stattrib_synchronize;
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sac->get_active = kvm_s390_stattrib_get_active;
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}
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static const TypeInfo kvm_s390_stattrib_info = {
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.name = TYPE_KVM_S390_STATTRIB,
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.parent = TYPE_S390_STATTRIB,
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.instance_init = kvm_s390_stattrib_instance_init,
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.instance_size = sizeof(KVMS390StAttribState),
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.class_init = kvm_s390_stattrib_class_init,
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.class_size = sizeof(S390StAttribClass),
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};
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static void kvm_s390_stattrib_register_types(void)
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{
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type_register_static(&kvm_s390_stattrib_info);
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}
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type_init(kvm_s390_stattrib_register_types)
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@ -0,0 +1,342 @@
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/*
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* s390 storage attributes device
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*
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* Copyright 2016 IBM Corp.
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* Author(s): Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at
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* your option) any later version. See the COPYING file in the top-level
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* directory.
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*/
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#include "qemu/osdep.h"
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#include "hw/boards.h"
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#include "migration/qemu-file.h"
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#include "migration/register.h"
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#include "hw/s390x/storage-attributes.h"
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#include "qemu/error-report.h"
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#include "sysemu/kvm.h"
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#include "exec/ram_addr.h"
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#include "qapi/error.h"
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#define CMMA_BLOCK_SIZE (1 << 10)
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#define STATTR_FLAG_EOS 0x01ULL
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#define STATTR_FLAG_MORE 0x02ULL
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#define STATTR_FLAG_ERROR 0x04ULL
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#define STATTR_FLAG_DONE 0x08ULL
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void s390_stattrib_init(void)
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{
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Object *obj;
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obj = kvm_s390_stattrib_create();
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if (!obj) {
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obj = object_new(TYPE_QEMU_S390_STATTRIB);
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}
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object_property_add_child(qdev_get_machine(), TYPE_S390_STATTRIB,
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obj, NULL);
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object_unref(obj);
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qdev_init_nofail(DEVICE(obj));
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}
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/* Migration support: */
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static int cmma_load(QEMUFile *f, void *opaque, int version_id)
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{
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S390StAttribState *sas = S390_STATTRIB(opaque);
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S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
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uint64_t count, cur_gfn;
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int flags, ret = 0;
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ram_addr_t addr;
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uint8_t *buf;
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while (!ret) {
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addr = qemu_get_be64(f);
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flags = addr & ~TARGET_PAGE_MASK;
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addr &= TARGET_PAGE_MASK;
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switch (flags) {
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case STATTR_FLAG_MORE: {
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cur_gfn = addr / TARGET_PAGE_SIZE;
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count = qemu_get_be64(f);
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buf = g_try_malloc(count);
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if (!buf) {
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error_report("cmma_load could not allocate memory");
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ret = -ENOMEM;
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break;
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}
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qemu_get_buffer(f, buf, count);
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ret = sac->set_stattr(sas, cur_gfn, count, buf);
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if (ret < 0) {
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error_report("Error %d while setting storage attributes", ret);
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}
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g_free(buf);
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break;
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}
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case STATTR_FLAG_ERROR: {
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error_report("Storage attributes data is incomplete");
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ret = -EINVAL;
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break;
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}
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case STATTR_FLAG_DONE:
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/* This is after the last pre-copied value has been sent, nothing
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* more will be sent after this. Pre-copy has finished, and we
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* are done flushing all the remaining values. Now the target
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* system is about to take over. We synchronize the buffer to
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* apply the actual correct values where needed.
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*/
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sac->synchronize(sas);
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break;
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case STATTR_FLAG_EOS:
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/* Normal exit */
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return 0;
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default:
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error_report("Unexpected storage attribute flag data: %#x", flags);
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ret = -EINVAL;
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}
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}
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return ret;
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}
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static int cmma_save_setup(QEMUFile *f, void *opaque)
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{
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S390StAttribState *sas = S390_STATTRIB(opaque);
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S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
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int res;
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/*
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* Signal that we want to start a migration, thus needing PGSTE dirty
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* tracking.
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*/
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res = sac->set_migrationmode(sas, 1);
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if (res) {
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return res;
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}
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qemu_put_be64(f, STATTR_FLAG_EOS);
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return 0;
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}
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static void cmma_save_pending(QEMUFile *f, void *opaque, uint64_t max_size,
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uint64_t *non_postcopiable_pending,
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uint64_t *postcopiable_pending)
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{
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S390StAttribState *sas = S390_STATTRIB(opaque);
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S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
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long long res = sac->get_dirtycount(sas);
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if (res >= 0) {
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*non_postcopiable_pending += res;
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}
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}
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static int cmma_save(QEMUFile *f, void *opaque, int final)
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{
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S390StAttribState *sas = S390_STATTRIB(opaque);
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S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
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uint8_t *buf;
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int r, cx, reallen = 0, ret = 0;
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uint32_t buflen = 1 << 19; /* 512kB cover 2GB of guest memory */
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uint64_t start_gfn = sas->migration_cur_gfn;
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buf = g_try_malloc(buflen);
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if (!buf) {
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error_report("Could not allocate memory to save storage attributes");
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return -ENOMEM;
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}
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while (final ? 1 : qemu_file_rate_limit(f) == 0) {
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reallen = sac->get_stattr(sas, &start_gfn, buflen, buf);
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if (reallen < 0) {
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g_free(buf);
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return reallen;
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}
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ret = 1;
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if (!reallen) {
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break;
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}
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qemu_put_be64(f, (start_gfn << TARGET_PAGE_BITS) | STATTR_FLAG_MORE);
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qemu_put_be64(f, reallen);
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for (cx = 0; cx < reallen; cx++) {
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qemu_put_byte(f, buf[cx]);
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}
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if (!sac->get_dirtycount(sas)) {
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break;
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}
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}
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sas->migration_cur_gfn = start_gfn + reallen;
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g_free(buf);
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if (final) {
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qemu_put_be64(f, STATTR_FLAG_DONE);
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}
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qemu_put_be64(f, STATTR_FLAG_EOS);
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r = qemu_file_get_error(f);
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if (r < 0) {
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return r;
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}
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return ret;
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}
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static int cmma_save_iterate(QEMUFile *f, void *opaque)
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{
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return cmma_save(f, opaque, 0);
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}
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static int cmma_save_complete(QEMUFile *f, void *opaque)
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{
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return cmma_save(f, opaque, 1);
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}
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static void cmma_save_cleanup(void *opaque)
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{
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S390StAttribState *sas = S390_STATTRIB(opaque);
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S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
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sac->set_migrationmode(sas, 0);
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}
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static bool cmma_active(void *opaque)
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{
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S390StAttribState *sas = S390_STATTRIB(opaque);
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S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
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return sac->get_active(sas);
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}
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/* QEMU object: */
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static void qemu_s390_stattrib_instance_init(Object *obj)
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{
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}
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static int qemu_s390_peek_stattr_stub(S390StAttribState *sa, uint64_t start_gfn,
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uint32_t count, uint8_t *values)
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{
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return 0;
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}
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static void qemu_s390_synchronize_stub(S390StAttribState *sa)
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{
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}
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static int qemu_s390_get_stattr_stub(S390StAttribState *sa, uint64_t *start_gfn,
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uint32_t count, uint8_t *values)
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{
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return 0;
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}
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static long long qemu_s390_get_dirtycount_stub(S390StAttribState *sa)
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{
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return 0;
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}
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static int qemu_s390_set_migrationmode_stub(S390StAttribState *sa, bool value)
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{
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return 0;
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}
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static int qemu_s390_get_active(S390StAttribState *sa)
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{
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return sa->migration_enabled;
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}
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static void qemu_s390_stattrib_class_init(ObjectClass *oc, void *data)
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{
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S390StAttribClass *sa_cl = S390_STATTRIB_CLASS(oc);
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sa_cl->synchronize = qemu_s390_synchronize_stub;
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sa_cl->get_stattr = qemu_s390_get_stattr_stub;
|
||||
sa_cl->set_stattr = qemu_s390_peek_stattr_stub;
|
||||
sa_cl->peek_stattr = qemu_s390_peek_stattr_stub;
|
||||
sa_cl->set_migrationmode = qemu_s390_set_migrationmode_stub;
|
||||
sa_cl->get_dirtycount = qemu_s390_get_dirtycount_stub;
|
||||
sa_cl->get_active = qemu_s390_get_active;
|
||||
}
|
||||
|
||||
static const TypeInfo qemu_s390_stattrib_info = {
|
||||
.name = TYPE_QEMU_S390_STATTRIB,
|
||||
.parent = TYPE_S390_STATTRIB,
|
||||
.instance_init = qemu_s390_stattrib_instance_init,
|
||||
.instance_size = sizeof(QEMUS390StAttribState),
|
||||
.class_init = qemu_s390_stattrib_class_init,
|
||||
.class_size = sizeof(S390StAttribClass),
|
||||
};
|
||||
|
||||
/* Generic abstract object: */
|
||||
|
||||
static void s390_stattrib_realize(DeviceState *dev, Error **errp)
|
||||
{
|
||||
bool ambiguous = false;
|
||||
|
||||
object_resolve_path_type("", TYPE_S390_STATTRIB, &ambiguous);
|
||||
if (ambiguous) {
|
||||
error_setg(errp, "storage_attributes device already exists");
|
||||
}
|
||||
}
|
||||
|
||||
static void s390_stattrib_class_init(ObjectClass *oc, void *data)
|
||||
{
|
||||
DeviceClass *dc = DEVICE_CLASS(oc);
|
||||
|
||||
dc->hotpluggable = false;
|
||||
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
|
||||
dc->realize = s390_stattrib_realize;
|
||||
}
|
||||
|
||||
static inline bool s390_stattrib_get_migration_enabled(Object *obj, Error **e)
|
||||
{
|
||||
S390StAttribState *s = S390_STATTRIB(obj);
|
||||
|
||||
return s->migration_enabled;
|
||||
}
|
||||
|
||||
static inline void s390_stattrib_set_migration_enabled(Object *obj, bool value,
|
||||
Error **errp)
|
||||
{
|
||||
S390StAttribState *s = S390_STATTRIB(obj);
|
||||
|
||||
s->migration_enabled = value;
|
||||
}
|
||||
|
||||
static void s390_stattrib_instance_init(Object *obj)
|
||||
{
|
||||
S390StAttribState *sas = S390_STATTRIB(obj);
|
||||
SaveVMHandlers *ops;
|
||||
|
||||
/* ops will always be freed by qemu when unregistering */
|
||||
ops = g_new0(SaveVMHandlers, 1);
|
||||
|
||||
ops->save_setup = cmma_save_setup;
|
||||
ops->save_live_iterate = cmma_save_iterate;
|
||||
ops->save_live_complete_precopy = cmma_save_complete;
|
||||
ops->save_live_pending = cmma_save_pending;
|
||||
ops->save_cleanup = cmma_save_cleanup;
|
||||
ops->load_state = cmma_load;
|
||||
ops->is_active = cmma_active;
|
||||
register_savevm_live(NULL, TYPE_S390_STATTRIB, 0, 0, ops, sas);
|
||||
|
||||
object_property_add_bool(obj, "migration-enabled",
|
||||
s390_stattrib_get_migration_enabled,
|
||||
s390_stattrib_set_migration_enabled, NULL);
|
||||
object_property_set_bool(obj, true, "migration-enabled", NULL);
|
||||
sas->migration_cur_gfn = 0;
|
||||
}
|
||||
|
||||
static const TypeInfo s390_stattrib_info = {
|
||||
.name = TYPE_S390_STATTRIB,
|
||||
.parent = TYPE_DEVICE,
|
||||
.instance_init = s390_stattrib_instance_init,
|
||||
.instance_size = sizeof(S390StAttribState),
|
||||
.class_init = s390_stattrib_class_init,
|
||||
.class_size = sizeof(S390StAttribClass),
|
||||
.abstract = true,
|
||||
};
|
||||
|
||||
static void s390_stattrib_register_types(void)
|
||||
{
|
||||
type_register_static(&s390_stattrib_info);
|
||||
type_register_static(&qemu_s390_stattrib_info);
|
||||
}
|
||||
|
||||
type_init(s390_stattrib_register_types)
|
||||
|
|
@ -24,6 +24,7 @@
|
|||
#include "qemu/config-file.h"
|
||||
#include "s390-pci-bus.h"
|
||||
#include "hw/s390x/storage-keys.h"
|
||||
#include "hw/s390x/storage-attributes.h"
|
||||
#include "hw/compat.h"
|
||||
#include "ipl.h"
|
||||
#include "hw/s390x/s390-virtio-ccw.h"
|
||||
|
|
@ -103,6 +104,8 @@ void s390_memory_init(ram_addr_t mem_size)
|
|||
|
||||
/* Initialize storage key device */
|
||||
s390_skeys_init();
|
||||
/* Initialize storage attributes device */
|
||||
s390_stattrib_init();
|
||||
}
|
||||
|
||||
static SaveVMHandlers savevm_gtod = {
|
||||
|
|
@ -406,7 +409,12 @@ static const TypeInfo ccw_machine_info = {
|
|||
type_init(ccw_machine_register_##suffix)
|
||||
|
||||
#define CCW_COMPAT_2_9 \
|
||||
HW_COMPAT_2_9
|
||||
HW_COMPAT_2_9 \
|
||||
{\
|
||||
.driver = TYPE_S390_STATTRIB,\
|
||||
.property = "migration-enabled",\
|
||||
.value = "off",\
|
||||
},
|
||||
|
||||
#define CCW_COMPAT_2_8 \
|
||||
HW_COMPAT_2_8 \
|
||||
|
|
|
|||
|
|
@ -0,0 +1,77 @@
|
|||
/*
|
||||
* s390 storage attributes device
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#ifndef S390_STORAGE_ATTRIBUTES_H
|
||||
#define S390_STORAGE_ATTRIBUTES_H
|
||||
|
||||
#include <hw/qdev.h>
|
||||
|
||||
#define TYPE_S390_STATTRIB "s390-storage_attributes"
|
||||
#define TYPE_QEMU_S390_STATTRIB "s390-storage_attributes-qemu"
|
||||
#define TYPE_KVM_S390_STATTRIB "s390-storage_attributes-kvm"
|
||||
|
||||
#define S390_STATTRIB(obj) \
|
||||
OBJECT_CHECK(S390StAttribState, (obj), TYPE_S390_STATTRIB)
|
||||
|
||||
typedef struct S390StAttribState {
|
||||
DeviceState parent_obj;
|
||||
uint64_t migration_cur_gfn;
|
||||
bool migration_enabled;
|
||||
} S390StAttribState;
|
||||
|
||||
#define S390_STATTRIB_CLASS(klass) \
|
||||
OBJECT_CLASS_CHECK(S390StAttribClass, (klass), TYPE_S390_STATTRIB)
|
||||
#define S390_STATTRIB_GET_CLASS(obj) \
|
||||
OBJECT_GET_CLASS(S390StAttribClass, (obj), TYPE_S390_STATTRIB)
|
||||
|
||||
typedef struct S390StAttribClass {
|
||||
DeviceClass parent_class;
|
||||
/* Return value: < 0 on error, or new count */
|
||||
int (*get_stattr)(S390StAttribState *sa, uint64_t *start_gfn,
|
||||
uint32_t count, uint8_t *values);
|
||||
int (*peek_stattr)(S390StAttribState *sa, uint64_t start_gfn,
|
||||
uint32_t count, uint8_t *values);
|
||||
int (*set_stattr)(S390StAttribState *sa, uint64_t start_gfn,
|
||||
uint32_t count, uint8_t *values);
|
||||
void (*synchronize)(S390StAttribState *sa);
|
||||
int (*set_migrationmode)(S390StAttribState *sa, bool value);
|
||||
int (*get_active)(S390StAttribState *sa);
|
||||
long long (*get_dirtycount)(S390StAttribState *sa);
|
||||
} S390StAttribClass;
|
||||
|
||||
#define QEMU_S390_STATTRIB(obj) \
|
||||
OBJECT_CHECK(QEMUS390StAttribState, (obj), TYPE_QEMU_S390_STATTRIB)
|
||||
|
||||
typedef struct QEMUS390StAttribState {
|
||||
S390StAttribState parent_obj;
|
||||
} QEMUS390StAttribState;
|
||||
|
||||
#define KVM_S390_STATTRIB(obj) \
|
||||
OBJECT_CHECK(KVMS390StAttribState, (obj), TYPE_KVM_S390_STATTRIB)
|
||||
|
||||
typedef struct KVMS390StAttribState {
|
||||
S390StAttribState parent_obj;
|
||||
uint64_t still_dirty;
|
||||
uint8_t *incoming_buffer;
|
||||
} KVMS390StAttribState;
|
||||
|
||||
void s390_stattrib_init(void);
|
||||
|
||||
#ifdef CONFIG_KVM
|
||||
Object *kvm_s390_stattrib_create(void);
|
||||
#else
|
||||
static inline Object *kvm_s390_stattrib_create(void)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* S390_STORAGE_ATTRIBUTES_H */
|
||||
Loading…
Reference in New Issue