On Wed, 7 Aug 2019 08:19:16 +0000 Shameerali Kolothum Thodi <shameerali.kolothum.th...@huawei.com> wrote:
> Hi Igor, > > > -----Original Message----- > > From: Igor Mammedov [mailto:imamm...@redhat.com] > > Sent: 06 August 2019 14:09 > > To: Shameerali Kolothum Thodi <shameerali.kolothum.th...@huawei.com> > > Cc: qemu-devel@nongnu.org; qemu-...@nongnu.org; > > eric.au...@redhat.com; peter.mayd...@linaro.org; sa...@linux.intel.com; > > ard.biesheu...@linaro.org; Linuxarm <linux...@huawei.com>; xuwei (O) > > <xuw...@huawei.com>; shannon.zha...@gmail.com; > > sebastien.bo...@intel.com; ler...@redhat.com > > Subject: Re: [Qemu-devel] [PATCH-for-4.2 v8 6/9] hw/arm/virt: Enable device > > memory cold/hot plug with ACPI boot > > [...] > > > > +static inline DeviceState *create_acpi_ged(VirtMachineState *vms, > > qemu_irq *pic) > > > +{ > > > + DeviceState *dev; > > > + int irq = vms->irqmap[VIRT_ACPI_GED]; > > > + uint32_t event = ACPI_GED_MEM_HOTPLUG_EVT; > > > + > > > + dev = DEVICE(object_new(TYPE_ACPI_GED)); > > > + qdev_prop_set_uint64(dev, "memhp-base", > > > + vms->memmap[VIRT_PCDIMM_ACPI].base); > > > + qdev_prop_set_uint64(dev, "ged-base", > > vms->memmap[VIRT_ACPI_GED].base); > > > + qdev_prop_set_uint32(dev, "ged-event", event); > > > + object_property_add_child(qdev_get_machine(), "acpi-ged", > > > + OBJECT(dev), NULL); > > > + qdev_init_nofail(dev); > > > + qdev_connect_gpio_out_named(dev, "ged-irq", 0, pic[irq]); > > > + > > > + object_unref(OBJECT(dev)); > > > + > > > + return dev; > > > +} > > > > this function will need changes to accommodate for sysbus device > > init sequence [3/9]. > > Yes. I think we are proposing to use sysbus_mmio_map() here for "ged-base". > But what about " memhp-base"? Is it ok to invoke > acpi_memory_hotplug_init(get_system_memoty(), ...) from ged device? no it's not ok. One could expose container memory region as sysbus mmio and then put ged-io and AcpiGedState::memhp_state::io within it. something like: board: sysbus_mmio_map(ged, 0 /* io_contaner number */, ged-base) ged_initfn() register io_container as sysbus mmio region ged_realize() memory_region_add_subregion(&ged->io_container, 0, &ged_st->io); acpi_memory_hotplug_init(&ged->io_container,, &ged->acpi_memory_hotplug, AFTER_GED_IO_OFFSET) that would make GED's MMIO available to guest at ged-base and memhp IO will be available at address after it. You can go even further (more flexible) and register ged_st->io as separate sysbus mmio and use a container exclusively for memhp, in this case you'd be able to map memhp io from board independently from ged-base. > Or go with _set_link() function to pass the address space ? > > Thanks, > Shameer > > > > > + > > > static void create_its(VirtMachineState *vms, DeviceState *gicdev) > > > { > > > const char *itsclass = its_class_name(); > > > @@ -1483,6 +1508,7 @@ static void machvirt_init(MachineState *machine) > > > MemoryRegion *ram = g_new(MemoryRegion, 1); > > > bool firmware_loaded; > > > bool aarch64 = true; > > > + bool has_ged = !vmc->no_ged; > > > unsigned int smp_cpus = machine->smp.cpus; > > > unsigned int max_cpus = machine->smp.max_cpus; > > > > > > @@ -1697,6 +1723,10 @@ static void machvirt_init(MachineState > > *machine) > > > > > > create_gpio(vms, pic); > > > > > > + if (has_ged && aarch64 && firmware_loaded && acpi_enabled) { > > > + vms->acpi_dev = create_acpi_ged(vms, pic); > > > + } > > > + > > > /* Create mmio transports, so the user can create virtio backends > > > * (which will be automatically plugged in to the transports). If > > > * no backend is created the transport will just sit harmlessly idle. > > > @@ -1876,27 +1906,34 @@ static const CPUArchIdList > > *virt_possible_cpu_arch_ids(MachineState *ms) > > > static void virt_memory_pre_plug(HotplugHandler *hotplug_dev, > > DeviceState *dev, > > > Error **errp) > > > { > > > + VirtMachineState *vms = VIRT_MACHINE(hotplug_dev); > > > + const bool is_nvdimm = object_dynamic_cast(OBJECT(dev), > > TYPE_NVDIMM); > > > > > > - /* > > > - * The device memory is not yet exposed to the Guest either through > > > - * DT or ACPI and hence both cold/hot plug of memory is explicitly > > > - * disabled for now. > > > - */ > > > - if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) { > > > - error_setg(errp, "memory cold/hot plug is not yet supported"); > > > + if (is_nvdimm) { > > > + error_setg(errp, "nvdimm is not yet supported"); > > > return; > > > } > > > > > > + if (!vms->acpi_dev) { > > > + error_setg(errp, "memory hotplug is not enabled: missing acpi > > device"); > > > + return; > > > + } > > > + > > > + hotplug_handler_pre_plug(HOTPLUG_HANDLER(vms->acpi_dev), dev, > > errp); > > use local_error and check for error condition here. see pc_memory_pre_plug() > > > > > + > > > pc_dimm_pre_plug(PC_DIMM(dev), MACHINE(hotplug_dev), NULL, > > errp); > > > } > > > > > > static void virt_memory_plug(HotplugHandler *hotplug_dev, > > > DeviceState *dev, Error **errp) > > > { > > > + HotplugHandlerClass *hhc; > > > VirtMachineState *vms = VIRT_MACHINE(hotplug_dev); > > > > > > pc_dimm_plug(PC_DIMM(dev), MACHINE(vms), NULL); > > ^^^^ > > > > > > + hhc = HOTPLUG_HANDLER_GET_CLASS(vms->acpi_dev); > > > + hhc->plug(HOTPLUG_HANDLER(vms->acpi_dev), dev, NULL); > > ^^^^ > > why errors are ignored here, pls check for errors and propagate > > them to the caller. > > > > > } > > > > > > static void virt_machine_device_pre_plug_cb(HotplugHandler > > *hotplug_dev, > > > @@ -2102,8 +2139,11 @@ DEFINE_VIRT_MACHINE_AS_LATEST(4, 2) > > > > > > static void virt_machine_4_1_options(MachineClass *mc) > > > { > > > + VirtMachineClass *vmc = VIRT_MACHINE_CLASS(OBJECT_CLASS(mc)); > > > + > > > virt_machine_4_2_options(mc); > > > compat_props_add(mc->compat_props, hw_compat_4_1, > > hw_compat_4_1_len); > > > + vmc->no_ged = true; > > > } > > > DEFINE_VIRT_MACHINE(4, 1) > > > > > > diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h > > > index a72094204e..577ee49b4b 100644 > > > --- a/include/hw/arm/virt.h > > > +++ b/include/hw/arm/virt.h > > > @@ -77,6 +77,8 @@ enum { > > > VIRT_GPIO, > > > VIRT_SECURE_UART, > > > VIRT_SECURE_MEM, > > > + VIRT_PCDIMM_ACPI, > > > + VIRT_ACPI_GED, > > > VIRT_LOWMEMMAP_LAST, > > > }; > > > > > > @@ -106,6 +108,7 @@ typedef struct { > > > bool claim_edge_triggered_timers; > > > bool smbios_old_sys_ver; > > > bool no_highmem_ecam; > > > + bool no_ged; /* Machines < 4.2 has no support for ACPI GED device > > */ > > > } VirtMachineClass; > > > > > > typedef struct { > > > @@ -133,6 +136,7 @@ typedef struct { > > > uint32_t iommu_phandle; > > > int psci_conduit; > > > hwaddr highest_gpa; > > > + DeviceState *acpi_dev; > > > } VirtMachineState; > > > > > > #define VIRT_ECAM_ID(high) (high ? VIRT_HIGH_PCIE_ECAM : > > VIRT_PCIE_ECAM) > > > diff --git a/tests/bios-tables-test-allowed-diff.h > > b/tests/bios-tables-test-allowed-diff.h > > > index dfb8523c8b..7b4adbc822 100644 > > > --- a/tests/bios-tables-test-allowed-diff.h > > > +++ b/tests/bios-tables-test-allowed-diff.h > > > @@ -1 +1,2 @@ > > > /* List of comma-separated changed AML files to ignore */ > > > +"tests/data/acpi/virt/DSDT", >
