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memhp: extend address auto assignment to support gaps

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setting gap to TRUE will make sparse DIMM
address auto allocation, leaving gaps between
a new DIMM address and preceeding existing DIMM.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Igor Mammedov 2015-09-29 16:53:28 +02:00 committed by Michael S. Tsirkin
parent 8a9b6b37da
commit df0acded19
4 changed files with 16 additions and 11 deletions
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3
hw/i386/pc.c
View File

@ -1644,7 +1644,8 @@ static void pc_dimm_plug(HotplugHandler *hotplug_dev,
goto out;
}
pc_dimm_memory_plug(dev, &pcms->hotplug_memory, mr, align, &local_err);
pc_dimm_memory_plug(dev, &pcms->hotplug_memory, mr, align, false,
&local_err);
if (local_err) {
goto out;
}

15
hw/mem/pc-dimm.c
View File

@ -32,7 +32,8 @@ typedef struct pc_dimms_capacity {
} pc_dimms_capacity;
void pc_dimm_memory_plug(DeviceState *dev, MemoryHotplugState *hpms,
MemoryRegion *mr, uint64_t align, Error **errp)
MemoryRegion *mr, uint64_t align, bool gap,
Error **errp)
{
int slot;
MachineState *machine = MACHINE(qdev_get_machine());
@ -48,7 +49,7 @@ void pc_dimm_memory_plug(DeviceState *dev, MemoryHotplugState *hpms,
addr = pc_dimm_get_free_addr(hpms->base,
memory_region_size(&hpms->mr),
!addr ? NULL : &addr, align,
!addr ? NULL : &addr, align, gap,
memory_region_size(mr), &local_err);
if (local_err) {
goto out;
@ -287,8 +288,8 @@ static int pc_dimm_built_list(Object *obj, void *opaque)
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)
uint64_t *hint, uint64_t align, bool gap,
uint64_t size, Error **errp)
{
GSList *list = NULL, *item;
uint64_t new_addr, ret = 0;
@ -333,13 +334,15 @@ uint64_t pc_dimm_get_free_addr(uint64_t address_space_start,
goto out;
}
if (ranges_overlap(dimm->addr, dimm_size, new_addr, size)) {
if (ranges_overlap(dimm->addr, dimm_size, new_addr,
size + (gap ? 1 : 0))) {
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);
new_addr = QEMU_ALIGN_UP(dimm->addr + dimm_size + (gap ? 1 : 0),
align);
}
}
ret = new_addr;

2
hw/ppc/spapr.c
View File

@ -2096,7 +2096,7 @@ static void spapr_memory_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
goto out;
}
pc_dimm_memory_plug(dev, &ms->hotplug_memory, mr, align, &local_err);
pc_dimm_memory_plug(dev, &ms->hotplug_memory, mr, align, false, &local_err);
if (local_err) {
goto out;
}

7
include/hw/mem/pc-dimm.h
View File

@ -83,15 +83,16 @@ typedef struct MemoryHotplugState {
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);
uint64_t *hint, uint64_t align, bool gap,
uint64_t size, Error **errp);
int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp);
int qmp_pc_dimm_device_list(Object *obj, void *opaque);
uint64_t pc_existing_dimms_capacity(Error **errp);
void pc_dimm_memory_plug(DeviceState *dev, MemoryHotplugState *hpms,
MemoryRegion *mr, uint64_t align, Error **errp);
MemoryRegion *mr, uint64_t align, bool gap,
Error **errp);
void pc_dimm_memory_unplug(DeviceState *dev, MemoryHotplugState *hpms,
MemoryRegion *mr);
#endif