qemu/hw/mem/pc-dimm.c
Chetan Pant 61f3c91a67 nomaintainer: Fix Lesser GPL version number
There is no "version 2" of the "Lesser" General Public License.
It is either "GPL version 2.0" or "Lesser GPL version 2.1".
This patch replaces all occurrences of "Lesser GPL version 2" with
"Lesser GPL version 2.1" in comment section.

This patch contains all the files, whose maintainer I could not get
from ‘get_maintainer.pl’ script.

Signed-off-by: Chetan Pant <chetan4windows@gmail.com>
Message-Id: <20201023124424.20177-1-chetan4windows@gmail.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
[thuth: Adapted exec.c and qdev-monitor.c to new location]
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-11-15 17:04:40 +01:00

306 lines
9.6 KiB
C

/*
* Dimm device for Memory Hotplug
*
* Copyright ProfitBricks GmbH 2012
* Copyright (C) 2014 Red Hat Inc
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>
*/
#include "qemu/osdep.h"
#include "hw/boards.h"
#include "hw/mem/pc-dimm.h"
#include "hw/qdev-properties.h"
#include "migration/vmstate.h"
#include "hw/mem/nvdimm.h"
#include "hw/mem/memory-device.h"
#include "qapi/error.h"
#include "qapi/visitor.h"
#include "qemu/module.h"
#include "sysemu/hostmem.h"
#include "sysemu/numa.h"
#include "trace.h"
static int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp);
void pc_dimm_pre_plug(PCDIMMDevice *dimm, MachineState *machine,
const uint64_t *legacy_align, Error **errp)
{
Error *local_err = NULL;
int slot;
slot = object_property_get_int(OBJECT(dimm), PC_DIMM_SLOT_PROP,
&error_abort);
if ((slot < 0 || slot >= machine->ram_slots) &&
slot != PC_DIMM_UNASSIGNED_SLOT) {
error_setg(errp,
"invalid slot number %d, valid range is [0-%" PRIu64 "]",
slot, machine->ram_slots - 1);
return;
}
slot = pc_dimm_get_free_slot(slot == PC_DIMM_UNASSIGNED_SLOT ? NULL : &slot,
machine->ram_slots, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
object_property_set_int(OBJECT(dimm), PC_DIMM_SLOT_PROP, slot,
&error_abort);
trace_mhp_pc_dimm_assigned_slot(slot);
memory_device_pre_plug(MEMORY_DEVICE(dimm), machine, legacy_align,
errp);
}
void pc_dimm_plug(PCDIMMDevice *dimm, MachineState *machine)
{
PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm,
&error_abort);
memory_device_plug(MEMORY_DEVICE(dimm), machine);
vmstate_register_ram(vmstate_mr, DEVICE(dimm));
}
void pc_dimm_unplug(PCDIMMDevice *dimm, MachineState *machine)
{
PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm,
&error_abort);
memory_device_unplug(MEMORY_DEVICE(dimm), machine);
vmstate_unregister_ram(vmstate_mr, DEVICE(dimm));
}
static int pc_dimm_slot2bitmap(Object *obj, void *opaque)
{
unsigned long *bitmap = opaque;
if (object_dynamic_cast(obj, TYPE_PC_DIMM)) {
DeviceState *dev = DEVICE(obj);
if (dev->realized) { /* count only realized DIMMs */
PCDIMMDevice *d = PC_DIMM(obj);
set_bit(d->slot, bitmap);
}
}
object_child_foreach(obj, pc_dimm_slot2bitmap, opaque);
return 0;
}
static int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp)
{
unsigned long *bitmap;
int slot = 0;
if (max_slots <= 0) {
error_setg(errp, "no slots where allocated, please specify "
"the 'slots' option");
return slot;
}
bitmap = bitmap_new(max_slots);
object_child_foreach(qdev_get_machine(), pc_dimm_slot2bitmap, bitmap);
/* check if requested slot is not occupied */
if (hint) {
if (*hint >= max_slots) {
error_setg(errp, "invalid slot# %d, should be less than %d",
*hint, max_slots);
} else if (!test_bit(*hint, bitmap)) {
slot = *hint;
} else {
error_setg(errp, "slot %d is busy", *hint);
}
goto out;
}
/* search for free slot */
slot = find_first_zero_bit(bitmap, max_slots);
if (slot == max_slots) {
error_setg(errp, "no free slots available");
}
out:
g_free(bitmap);
return slot;
}
static Property pc_dimm_properties[] = {
DEFINE_PROP_UINT64(PC_DIMM_ADDR_PROP, PCDIMMDevice, addr, 0),
DEFINE_PROP_UINT32(PC_DIMM_NODE_PROP, PCDIMMDevice, node, 0),
DEFINE_PROP_INT32(PC_DIMM_SLOT_PROP, PCDIMMDevice, slot,
PC_DIMM_UNASSIGNED_SLOT),
DEFINE_PROP_LINK(PC_DIMM_MEMDEV_PROP, PCDIMMDevice, hostmem,
TYPE_MEMORY_BACKEND, HostMemoryBackend *),
DEFINE_PROP_END_OF_LIST(),
};
static void pc_dimm_get_size(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
Error *local_err = NULL;
uint64_t value;
value = memory_device_get_region_size(MEMORY_DEVICE(obj), &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
visit_type_uint64(v, name, &value, errp);
}
static void pc_dimm_init(Object *obj)
{
object_property_add(obj, PC_DIMM_SIZE_PROP, "uint64", pc_dimm_get_size,
NULL, NULL, NULL);
}
static void pc_dimm_realize(DeviceState *dev, Error **errp)
{
PCDIMMDevice *dimm = PC_DIMM(dev);
PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
MachineState *ms = MACHINE(qdev_get_machine());
int nb_numa_nodes = ms->numa_state->num_nodes;
if (!dimm->hostmem) {
error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property is not set");
return;
} else if (host_memory_backend_is_mapped(dimm->hostmem)) {
error_setg(errp, "can't use already busy memdev: %s",
object_get_canonical_path_component(OBJECT(dimm->hostmem)));
return;
}
if (((nb_numa_nodes > 0) && (dimm->node >= nb_numa_nodes)) ||
(!nb_numa_nodes && dimm->node)) {
error_setg(errp, "'DIMM property " PC_DIMM_NODE_PROP " has value %"
PRIu32 "' which exceeds the number of numa nodes: %d",
dimm->node, nb_numa_nodes ? nb_numa_nodes : 1);
return;
}
if (ddc->realize) {
ddc->realize(dimm, errp);
}
host_memory_backend_set_mapped(dimm->hostmem, true);
}
static void pc_dimm_unrealize(DeviceState *dev)
{
PCDIMMDevice *dimm = PC_DIMM(dev);
host_memory_backend_set_mapped(dimm->hostmem, false);
}
static MemoryRegion *pc_dimm_get_memory_region(PCDIMMDevice *dimm, Error **errp)
{
if (!dimm->hostmem) {
error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property must be set");
return NULL;
}
return host_memory_backend_get_memory(dimm->hostmem);
}
static uint64_t pc_dimm_md_get_addr(const MemoryDeviceState *md)
{
return object_property_get_uint(OBJECT(md), PC_DIMM_ADDR_PROP,
&error_abort);
}
static void pc_dimm_md_set_addr(MemoryDeviceState *md, uint64_t addr,
Error **errp)
{
object_property_set_uint(OBJECT(md), PC_DIMM_ADDR_PROP, addr, errp);
}
static MemoryRegion *pc_dimm_md_get_memory_region(MemoryDeviceState *md,
Error **errp)
{
return pc_dimm_get_memory_region(PC_DIMM(md), errp);
}
static void pc_dimm_md_fill_device_info(const MemoryDeviceState *md,
MemoryDeviceInfo *info)
{
PCDIMMDeviceInfo *di = g_new0(PCDIMMDeviceInfo, 1);
const DeviceClass *dc = DEVICE_GET_CLASS(md);
const PCDIMMDevice *dimm = PC_DIMM(md);
const DeviceState *dev = DEVICE(md);
if (dev->id) {
di->has_id = true;
di->id = g_strdup(dev->id);
}
di->hotplugged = dev->hotplugged;
di->hotpluggable = dc->hotpluggable;
di->addr = dimm->addr;
di->slot = dimm->slot;
di->node = dimm->node;
di->size = object_property_get_uint(OBJECT(dimm), PC_DIMM_SIZE_PROP,
NULL);
di->memdev = object_get_canonical_path(OBJECT(dimm->hostmem));
if (object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM)) {
info->u.nvdimm.data = di;
info->type = MEMORY_DEVICE_INFO_KIND_NVDIMM;
} else {
info->u.dimm.data = di;
info->type = MEMORY_DEVICE_INFO_KIND_DIMM;
}
}
static void pc_dimm_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
PCDIMMDeviceClass *ddc = PC_DIMM_CLASS(oc);
MemoryDeviceClass *mdc = MEMORY_DEVICE_CLASS(oc);
dc->realize = pc_dimm_realize;
dc->unrealize = pc_dimm_unrealize;
device_class_set_props(dc, pc_dimm_properties);
dc->desc = "DIMM memory module";
ddc->get_vmstate_memory_region = pc_dimm_get_memory_region;
mdc->get_addr = pc_dimm_md_get_addr;
mdc->set_addr = pc_dimm_md_set_addr;
/* for a dimm plugged_size == region_size */
mdc->get_plugged_size = memory_device_get_region_size;
mdc->get_memory_region = pc_dimm_md_get_memory_region;
mdc->fill_device_info = pc_dimm_md_fill_device_info;
}
static TypeInfo pc_dimm_info = {
.name = TYPE_PC_DIMM,
.parent = TYPE_DEVICE,
.instance_size = sizeof(PCDIMMDevice),
.instance_init = pc_dimm_init,
.class_init = pc_dimm_class_init,
.class_size = sizeof(PCDIMMDeviceClass),
.interfaces = (InterfaceInfo[]) {
{ TYPE_MEMORY_DEVICE },
{ }
},
};
static void pc_dimm_register_types(void)
{
type_register_static(&pc_dimm_info);
}
type_init(pc_dimm_register_types)