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Diffstat (limited to 'hw')
-rw-r--r--hw/mem/memory-device.c86
-rw-r--r--hw/mem/pc-dimm.c109
2 files changed, 88 insertions, 107 deletions
diff --git a/hw/mem/memory-device.c b/hw/mem/memory-device.c
index 6cbdaf99f3..a2cb85462f 100644
--- a/hw/mem/memory-device.c
+++ b/hw/mem/memory-device.c
@@ -48,6 +48,92 @@ static int memory_device_build_list(Object *obj, void *opaque)
return 0;
}
+uint64_t memory_device_get_free_addr(MachineState *ms, const uint64_t *hint,
+ uint64_t align, uint64_t size,
+ Error **errp)
+{
+ uint64_t address_space_start, address_space_end;
+ GSList *list = NULL, *item;
+ uint64_t new_addr = 0;
+
+ if (!ms->device_memory) {
+ error_setg(errp, "memory devices (e.g. for memory hotplug) are not "
+ "supported by the machine");
+ return 0;
+ }
+
+ if (!memory_region_size(&ms->device_memory->mr)) {
+ error_setg(errp, "memory devices (e.g. for memory hotplug) are not "
+ "enabled, please specify the maxmem option");
+ return 0;
+ }
+ address_space_start = ms->device_memory->base;
+ address_space_end = address_space_start +
+ memory_region_size(&ms->device_memory->mr);
+ g_assert(QEMU_ALIGN_UP(address_space_start, align) == address_space_start);
+ g_assert(address_space_end >= address_space_start);
+
+ if (hint && QEMU_ALIGN_UP(*hint, align) != *hint) {
+ error_setg(errp, "address must be aligned to 0x%" PRIx64 " bytes",
+ align);
+ return 0;
+ }
+
+ if (QEMU_ALIGN_UP(size, align) != size) {
+ error_setg(errp, "backend memory size must be multiple of 0x%"
+ PRIx64, align);
+ return 0;
+ }
+
+ if (hint) {
+ new_addr = *hint;
+ if (new_addr < address_space_start) {
+ error_setg(errp, "can't add memory [0x%" PRIx64 ":0x%" PRIx64
+ "] at 0x%" PRIx64, new_addr, size, address_space_start);
+ return 0;
+ } else if ((new_addr + size) > address_space_end) {
+ error_setg(errp, "can't add memory [0x%" PRIx64 ":0x%" PRIx64
+ "] beyond 0x%" PRIx64, new_addr, size,
+ address_space_end);
+ return 0;
+ }
+ } else {
+ new_addr = address_space_start;
+ }
+
+ /* find address range that will fit new memory device */
+ object_child_foreach(OBJECT(ms), memory_device_build_list, &list);
+ for (item = list; item; item = g_slist_next(item)) {
+ const MemoryDeviceState *md = item->data;
+ const MemoryDeviceClass *mdc = MEMORY_DEVICE_GET_CLASS(OBJECT(md));
+ uint64_t md_size, md_addr;
+
+ md_addr = mdc->get_addr(md);
+ md_size = mdc->get_region_size(md);
+ if (*errp) {
+ goto out;
+ }
+
+ if (ranges_overlap(md_addr, md_size, new_addr, size)) {
+ if (hint) {
+ const DeviceState *d = DEVICE(md);
+ error_setg(errp, "address range conflicts with '%s'", d->id);
+ goto out;
+ }
+ new_addr = QEMU_ALIGN_UP(md_addr + md_size, align);
+ }
+ }
+
+ if (new_addr + size > address_space_end) {
+ error_setg(errp, "could not find position in guest address space for "
+ "memory device - memory fragmented due to alignments");
+ goto out;
+ }
+out:
+ g_slist_free(list);
+ return new_addr;
+}
+
MemoryDeviceInfoList *qmp_memory_device_list(void)
{
GSList *devices = NULL, *item;
diff --git a/hw/mem/pc-dimm.c b/hw/mem/pc-dimm.c
index 37b8be80a1..9b70174fd9 100644
--- a/hw/mem/pc-dimm.c
+++ b/hw/mem/pc-dimm.c
@@ -23,9 +23,7 @@
#include "hw/mem/nvdimm.h"
#include "hw/mem/memory-device.h"
#include "qapi/error.h"
-#include "qemu/config-file.h"
#include "qapi/visitor.h"
-#include "qemu/range.h"
#include "sysemu/numa.h"
#include "sysemu/kvm.h"
#include "trace.h"
@@ -60,10 +58,8 @@ void pc_dimm_memory_plug(DeviceState *dev, MachineState *machine,
goto out;
}
- addr = pc_dimm_get_free_addr(hpms->base,
- memory_region_size(&hpms->mr),
- !addr ? NULL : &addr, align,
- memory_region_size(mr), &local_err);
+ addr = memory_device_get_free_addr(machine, !addr ? NULL : &addr, align,
+ memory_region_size(mr), &local_err);
if (local_err) {
goto out;
}
@@ -211,107 +207,6 @@ out:
return slot;
}
-static gint pc_dimm_addr_sort(gconstpointer a, gconstpointer b)
-{
- PCDIMMDevice *x = PC_DIMM(a);
- PCDIMMDevice *y = PC_DIMM(b);
- Int128 diff = int128_sub(int128_make64(x->addr), int128_make64(y->addr));
-
- if (int128_lt(diff, int128_zero())) {
- return -1;
- } else if (int128_gt(diff, int128_zero())) {
- return 1;
- }
- return 0;
-}
-
-static int pc_dimm_built_list(Object *obj, void *opaque)
-{
- GSList **list = opaque;
-
- if (object_dynamic_cast(obj, TYPE_PC_DIMM)) {
- DeviceState *dev = DEVICE(obj);
- if (dev->realized) { /* only realized DIMMs matter */
- *list = g_slist_insert_sorted(*list, dev, pc_dimm_addr_sort);
- }
- }
-
- object_child_foreach(obj, pc_dimm_built_list, opaque);
- return 0;
-}
-
-uint64_t pc_dimm_get_free_addr(uint64_t address_space_start,
- uint64_t address_space_size,
- uint64_t *hint, uint64_t align, uint64_t size,
- Error **errp)
-{
- GSList *list = NULL, *item;
- uint64_t new_addr, ret = 0;
- uint64_t address_space_end = address_space_start + address_space_size;
-
- g_assert(QEMU_ALIGN_UP(address_space_start, align) == address_space_start);
-
- if (!address_space_size) {
- error_setg(errp, "memory hotplug is not enabled, "
- "please add maxmem option");
- goto out;
- }
-
- if (hint && QEMU_ALIGN_UP(*hint, align) != *hint) {
- error_setg(errp, "address must be aligned to 0x%" PRIx64 " bytes",
- align);
- goto out;
- }
-
- if (QEMU_ALIGN_UP(size, align) != size) {
- error_setg(errp, "backend memory size must be multiple of 0x%"
- PRIx64, align);
- goto out;
- }
-
- assert(address_space_end > address_space_start);
- object_child_foreach(qdev_get_machine(), pc_dimm_built_list, &list);
-
- if (hint) {
- new_addr = *hint;
- } else {
- new_addr = address_space_start;
- }
-
- /* find address range that will fit new DIMM */
- for (item = list; item; item = g_slist_next(item)) {
- PCDIMMDevice *dimm = item->data;
- uint64_t dimm_size = object_property_get_uint(OBJECT(dimm),
- PC_DIMM_SIZE_PROP,
- errp);
- if (errp && *errp) {
- goto out;
- }
-
- if (ranges_overlap(dimm->addr, dimm_size, new_addr, size)) {
- if (hint) {
- DeviceState *d = DEVICE(dimm);
- error_setg(errp, "address range conflicts with '%s'", d->id);
- goto out;
- }
- new_addr = QEMU_ALIGN_UP(dimm->addr + dimm_size, align);
- }
- }
- ret = new_addr;
-
- if (new_addr < address_space_start) {
- error_setg(errp, "can't add memory [0x%" PRIx64 ":0x%" PRIx64
- "] at 0x%" PRIx64, new_addr, size, address_space_start);
- } else if ((new_addr + size) > address_space_end) {
- error_setg(errp, "can't add memory [0x%" PRIx64 ":0x%" PRIx64
- "] beyond 0x%" PRIx64, new_addr, size, address_space_end);
- }
-
-out:
- g_slist_free(list);
- return ret;
-}
-
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),
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-24 15:42:53 +0000