On Fri, 26 Jul 2019 11:45:16 +0100
Shameer Kolothum <shameerali.kolothum.th...@huawei.com> wrote:
> This initializes the GED device with base memory and irq, configures
> ged memory hotplug event and builds the corresponding aml code. With
> this, both hot and cold plug of device memory is enabled now for Guest
> with ACPI boot.
>
> Memory cold plug support with Guest DT boot is not yet supported.
>
> Signed-off-by: Shameer Kolothum <shameerali.kolothum.th...@huawei.com>
> Reviewed-by: Eric Auger <eric.au...@redhat.com>
> ---
> -Changed no_acpi_dev to no_ged.
> -Fixed 'dev' reference leak by object_new().
> -Updated bios-tables-test-allowed-diff.h to avoid "make check"
> failure.
>
> ---
> hw/arm/Kconfig | 2 +
> hw/arm/virt-acpi-build.c | 14 +++++++
> hw/arm/virt.c | 54 +++++++++++++++++++++++----
> include/hw/arm/virt.h | 4 ++
> tests/bios-tables-test-allowed-diff.h | 1 +
> 5 files changed, 68 insertions(+), 7 deletions(-)
>
> diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
> index 84961c17ab..ad7f7c089b 100644
> --- a/hw/arm/Kconfig
> +++ b/hw/arm/Kconfig
> @@ -22,6 +22,8 @@ config ARM_VIRT
> select ACPI_PCI
> select MEM_DEVICE
> select DIMM
> + select ACPI_MEMORY_HOTPLUG
> + select ACPI_HW_REDUCED
>
> config CHEETAH
> bool
> diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
> index 0afb372769..018b1e326d 100644
> --- a/hw/arm/virt-acpi-build.c
> +++ b/hw/arm/virt-acpi-build.c
> @@ -40,6 +40,8 @@
> #include "hw/acpi/aml-build.h"
> #include "hw/acpi/utils.h"
> #include "hw/acpi/pci.h"
> +#include "hw/acpi/memory_hotplug.h"
> +#include "hw/acpi/generic_event_device.h"
> #include "hw/pci/pcie_host.h"
> #include "hw/pci/pci.h"
> #include "hw/arm/virt.h"
> @@ -705,6 +707,7 @@ static void
> build_dsdt(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
> {
> Aml *scope, *dsdt;
> + MachineState *ms = MACHINE(vms);
> const MemMapEntry *memmap = vms->memmap;
> const int *irqmap = vms->irqmap;
>
> @@ -729,6 +732,17 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
> VirtMachineState *vms)
> vms->highmem, vms->highmem_ecam);
> acpi_dsdt_add_gpio(scope, &memmap[VIRT_GPIO],
> (irqmap[VIRT_GPIO] + ARM_SPI_BASE));
> + if (vms->acpi_dev) {
> + build_ged_aml(scope, "\\_SB."GED_DEVICE,
> + HOTPLUG_HANDLER(vms->acpi_dev),
> + irqmap[VIRT_ACPI_GED] + ARM_SPI_BASE,
> AML_SYSTEM_MEMORY);
> + }
> +
> + if (vms->acpi_dev && ms->ram_slots) {
> + build_memory_hotplug_aml(scope, ms->ram_slots, "\\_SB", NULL,
> + AML_SYSTEM_MEMORY);
> + }
> +
> acpi_dsdt_add_power_button(scope);
>
> aml_append(dsdt, scope);
> diff --git a/hw/arm/virt.c b/hw/arm/virt.c
> index bbe156dc35..41386a6eb7 100644
> --- a/hw/arm/virt.c
> +++ b/hw/arm/virt.c
> @@ -66,6 +66,7 @@
> #include "target/arm/internals.h"
> #include "hw/mem/pc-dimm.h"
> #include "hw/mem/nvdimm.h"
> +#include "hw/acpi/generic_event_device.h"
>
> #define DEFINE_VIRT_MACHINE_LATEST(major, minor, latest) \
> static void virt_##major##_##minor##_class_init(ObjectClass *oc, \
> @@ -136,6 +137,8 @@ static const MemMapEntry base_memmap[] = {
> [VIRT_GPIO] = { 0x09030000, 0x00001000 },
> [VIRT_SECURE_UART] = { 0x09040000, 0x00001000 },
> [VIRT_SMMU] = { 0x09050000, 0x00020000 },
> + [VIRT_PCDIMM_ACPI] = { 0x09070000, MEMORY_HOTPLUG_IO_LEN },
> + [VIRT_ACPI_GED] = { 0x09080000, ACPI_GED_EVT_SEL_LEN },
> [VIRT_MMIO] = { 0x0a000000, 0x00000200 },
> /* ...repeating for a total of NUM_VIRTIO_TRANSPORTS, each of that size
> */
> [VIRT_PLATFORM_BUS] = { 0x0c000000, 0x02000000 },
> @@ -171,6 +174,7 @@ static const int a15irqmap[] = {
> [VIRT_PCIE] = 3, /* ... to 6 */
> [VIRT_GPIO] = 7,
> [VIRT_SECURE_UART] = 8,
> + [VIRT_ACPI_GED] = 9,
> [VIRT_MMIO] = 16, /* ...to 16 + NUM_VIRTIO_TRANSPORTS - 1 */
> [VIRT_GIC_V2M] = 48, /* ...to 48 + NUM_GICV2M_SPIS - 1 */
> [VIRT_SMMU] = 74, /* ...to 74 + NUM_SMMU_IRQS - 1 */
> @@ -520,6 +524,27 @@ static void fdt_add_pmu_nodes(const VirtMachineState
> *vms)
> }
> }
>
> +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].
> +
> 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",
