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pc-dimm: assign and verify the "slot" property during pre_plug

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We can assign and verify the slot before realizing and trying to plug.
reading/writing the slot property should never fail, so let's reduce
error handling a bit by using &error_abort.

To do this during pre_plug, add and use (x86, ppc) pc_dimm_pre_plug().

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180801133444.11269-2-david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
David Hildenbrand 2018-08-01 15:34:41 +02:00 committed by Paolo Bonzini
parent efbb649da0
commit 8f1ffe5be8
4 changed files with 29 additions and 18 deletions
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2
hw/i386/pc.c
View File

@ -1696,6 +1696,8 @@ static void pc_memory_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
error_setg(errp, "nvdimm is not enabled: missing 'nvdimm' in '-M'");
return;
}
pc_dimm_pre_plug(dev, MACHINE(hotplug_dev), errp);
}
static void pc_memory_plug(HotplugHandler *hotplug_dev,

35
hw/mem/pc-dimm.c
View File

@ -29,10 +29,27 @@
static int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp);
void pc_dimm_pre_plug(DeviceState *dev, MachineState *machine, Error **errp)
{
Error *local_err = NULL;
int slot;
slot = object_property_get_int(OBJECT(dev), PC_DIMM_SLOT_PROP,
&error_abort);
slot = pc_dimm_get_free_slot(slot == PC_DIMM_UNASSIGNED_SLOT ? NULL : &slot,
machine->ram_slots, &local_err);
if (local_err) {
goto out;
}
object_property_set_int(OBJECT(dev), slot, PC_DIMM_SLOT_PROP, &error_abort);
trace_mhp_pc_dimm_assigned_slot(slot);
out:
error_propagate(errp, local_err);
}
void pc_dimm_plug(DeviceState *dev, MachineState *machine, uint64_t align,
Error **errp)
{
int slot;
PCDIMMDevice *dimm = PC_DIMM(dev);
PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm,
@ -59,22 +76,6 @@ void pc_dimm_plug(DeviceState *dev, MachineState *machine, uint64_t align,
}
trace_mhp_pc_dimm_assigned_address(addr);
slot = object_property_get_int(OBJECT(dev), PC_DIMM_SLOT_PROP, &local_err);
if (local_err) {
goto out;
}
slot = pc_dimm_get_free_slot(slot == PC_DIMM_UNASSIGNED_SLOT ? NULL : &slot,
machine->ram_slots, &local_err);
if (local_err) {
goto out;
}
object_property_set_int(OBJECT(dev), slot, PC_DIMM_SLOT_PROP, &local_err);
if (local_err) {
goto out;
}
trace_mhp_pc_dimm_assigned_slot(slot);
memory_device_plug_region(machine, mr, addr);
vmstate_register_ram(vmstate_mr, dev);

9
hw/ppc/spapr.c
View File

@ -3205,6 +3205,7 @@ static void spapr_memory_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
sPAPRMachineState *spapr = SPAPR_MACHINE(hotplug_dev);
PCDIMMDevice *dimm = PC_DIMM(dev);
PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
Error *local_err = NULL;
MemoryRegion *mr;
uint64_t size;
Object *memdev;
@ -3230,7 +3231,13 @@ static void spapr_memory_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
memdev = object_property_get_link(OBJECT(dimm), PC_DIMM_MEMDEV_PROP,
&error_abort);
pagesize = host_memory_backend_pagesize(MEMORY_BACKEND(memdev));
spapr_check_pagesize(spapr, pagesize, errp);
spapr_check_pagesize(spapr, pagesize, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
pc_dimm_pre_plug(dev, MACHINE(hotplug_dev), errp);
}
struct sPAPRDIMMState {

1
include/hw/mem/pc-dimm.h
View File

@ -79,6 +79,7 @@ typedef struct PCDIMMDeviceClass {
Error **errp);
} PCDIMMDeviceClass;
void pc_dimm_pre_plug(DeviceState *dev, MachineState *machine, Error **errp);
void pc_dimm_plug(DeviceState *dev, MachineState *machine, uint64_t align,
Error **errp);
void pc_dimm_unplug(DeviceState *dev, MachineState *machine);