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

We can assign and verify the address before realizing and trying to plug.
reading/writing the address property should never fail for DIMMs, so let's
reduce error handling a bit by using &error_abort. Getting access to the
memory region now might however fail. So forward errors from
get_memory_region() properly.

As all memory devices should use the alignment of the underlying memory
region for guest physical address asignment, do detection of the
alignment in pc_dimm_pre_plug(), but allow pc.c to overwrite the
alignment for compatibility handling.

Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180801133444.11269-5-david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
David Hildenbrand 2018-08-01 15:34:44 +02:00 committed by Paolo Bonzini
parent 57f0b73cf8
commit b0e624435b
4 changed files with 37 additions and 42 deletions
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16
hw/i386/pc.c
View File

@ -1679,7 +1679,9 @@ static void pc_memory_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
Error **errp)
{
const PCMachineState *pcms = PC_MACHINE(hotplug_dev);
const PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
const bool is_nvdimm = object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM);
const uint64_t legacy_align = TARGET_PAGE_SIZE;
/*
* When -no-acpi is used with Q35 machine type, no ACPI is built,
@ -1697,7 +1699,8 @@ static void pc_memory_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
return;
}
pc_dimm_pre_plug(dev, MACHINE(hotplug_dev), errp);
pc_dimm_pre_plug(dev, MACHINE(hotplug_dev),
pcmc->enforce_aligned_dimm ? NULL : &legacy_align, errp);
}
static void pc_memory_plug(HotplugHandler *hotplug_dev,
@ -1706,18 +1709,9 @@ static void pc_memory_plug(HotplugHandler *hotplug_dev,
HotplugHandlerClass *hhc;
Error *local_err = NULL;
PCMachineState *pcms = PC_MACHINE(hotplug_dev);
PCMachineClass *pcmc = PC_MACHINE_GET_CLASS(pcms);
PCDIMMDevice *dimm = PC_DIMM(dev);
PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
MemoryRegion *mr = ddc->get_memory_region(dimm, &error_abort);
uint64_t align = TARGET_PAGE_SIZE;
bool is_nvdimm = object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM);
if (pcmc->enforce_aligned_dimm) {
align = memory_region_get_alignment(mr);
}
pc_dimm_plug(dev, MACHINE(pcms), align, &local_err);
pc_dimm_plug(dev, MACHINE(pcms), &local_err);
if (local_err) {
goto out;
}

50
hw/mem/pc-dimm.c
View File

@ -29,9 +29,14 @@
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)
void pc_dimm_pre_plug(DeviceState *dev, MachineState *machine,
const uint64_t *legacy_align, Error **errp)
{
PCDIMMDevice *dimm = PC_DIMM(dev);
PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
Error *local_err = NULL;
MemoryRegion *mr;
uint64_t addr, align;
int slot;
slot = object_property_get_int(OBJECT(dev), PC_DIMM_SLOT_PROP,
@ -43,44 +48,41 @@ void pc_dimm_pre_plug(DeviceState *dev, MachineState *machine, Error **errp)
}
object_property_set_int(OBJECT(dev), slot, PC_DIMM_SLOT_PROP, &error_abort);
trace_mhp_pc_dimm_assigned_slot(slot);
mr = ddc->get_memory_region(dimm, &local_err);
if (local_err) {
goto out;
}
align = legacy_align ? *legacy_align : memory_region_get_alignment(mr);
addr = object_property_get_uint(OBJECT(dev), PC_DIMM_ADDR_PROP,
&error_abort);
addr = memory_device_get_free_addr(machine, !addr ? NULL : &addr, align,
memory_region_size(mr), &local_err);
if (local_err) {
goto out;
}
trace_mhp_pc_dimm_assigned_address(addr);
object_property_set_uint(OBJECT(dev), addr, PC_DIMM_ADDR_PROP,
&error_abort);
out:
error_propagate(errp, local_err);
}
void pc_dimm_plug(DeviceState *dev, MachineState *machine, uint64_t align,
Error **errp)
void pc_dimm_plug(DeviceState *dev, MachineState *machine, Error **errp)
{
PCDIMMDevice *dimm = PC_DIMM(dev);
PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm,
&error_abort);
MemoryRegion *mr = ddc->get_memory_region(dimm, &error_abort);
Error *local_err = NULL;
uint64_t addr;
addr = object_property_get_uint(OBJECT(dimm),
PC_DIMM_ADDR_PROP, &local_err);
if (local_err) {
goto out;
}
addr = memory_device_get_free_addr(machine, !addr ? NULL : &addr, align,
memory_region_size(mr), &local_err);
if (local_err) {
goto out;
}
object_property_set_uint(OBJECT(dev), addr, PC_DIMM_ADDR_PROP, &local_err);
if (local_err) {
goto out;
}
trace_mhp_pc_dimm_assigned_address(addr);
addr = object_property_get_uint(OBJECT(dev), PC_DIMM_ADDR_PROP,
&error_abort);
memory_device_plug_region(machine, mr, addr);
vmstate_register_ram(vmstate_mr, dev);
out:
error_propagate(errp, local_err);
}
void pc_dimm_unplug(DeviceState *dev, MachineState *machine)

7
hw/ppc/spapr.c
View File

@ -3164,13 +3164,12 @@ static void spapr_memory_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
PCDIMMDevice *dimm = PC_DIMM(dev);
PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
MemoryRegion *mr = ddc->get_memory_region(dimm, &error_abort);
uint64_t align, size, addr;
uint64_t size, addr;
uint32_t node;
align = memory_region_get_alignment(mr);
size = memory_region_size(mr);
pc_dimm_plug(dev, MACHINE(ms), align, &local_err);
pc_dimm_plug(dev, MACHINE(ms), &local_err);
if (local_err) {
goto out;
}
@ -3237,7 +3236,7 @@ static void spapr_memory_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
return;
}
pc_dimm_pre_plug(dev, MACHINE(hotplug_dev), errp);
pc_dimm_pre_plug(dev, MACHINE(hotplug_dev), NULL, errp);
}
struct sPAPRDIMMState {

6
include/hw/mem/pc-dimm.h
View File

@ -79,8 +79,8 @@ 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_pre_plug(DeviceState *dev, MachineState *machine,
const uint64_t *legacy_align, Error **errp);
void pc_dimm_plug(DeviceState *dev, MachineState *machine, Error **errp);
void pc_dimm_unplug(DeviceState *dev, MachineState *machine);
#endif