hw/arm/virt: Add nvdimm hot-plug infrastructure

This adds support to init nvdimm acpi state and build nvdimm acpi tables.
Please note nvdimm_support is not yet enabled.

Signed-off-by: Kwangwoo Lee <kwangwoo.lee@sk.com>
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20200421125934.14952-4-shameerali.kolothum.thodi@huawei.com>
Acked-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

hw/arm/Kconfig

@@ -25,6 +25,7 @@ config ARM_VIRT
     select DIMM
     select ACPI_MEMORY_HOTPLUG
     select ACPI_HW_REDUCED
+    select ACPI_NVDIMM
 
 config CHEETAH
     bool

hw/arm/virt-acpi-build.c

@@ -44,6 +44,7 @@
 #include "hw/pci/pcie_host.h"
 #include "hw/pci/pci.h"
 #include "hw/arm/virt.h"
+#include "hw/mem/nvdimm.h"
 #include "sysemu/numa.h"
 #include "sysemu/reset.h"
 #include "kvm_arm.h"
@@ -826,6 +827,11 @@ void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables)
         }
     }
 
+    if (ms->nvdimms_state->is_enabled) {
+        nvdimm_build_acpi(table_offsets, tables_blob, tables->linker,
+                          ms->nvdimms_state, ms->ram_slots);
+    }
+
     if (its_class_name() && !vmc->no_its) {
         acpi_add_table(table_offsets, tables_blob);
         build_iort(tables_blob, tables->linker, vms);

hw/arm/virt.c

@@ -150,6 +150,7 @@ static const MemMapEntry base_memmap[] = {
     [VIRT_SMMU] =               { 0x09050000, 0x00020000 },
     [VIRT_PCDIMM_ACPI] =        { 0x09070000, MEMORY_HOTPLUG_IO_LEN },
     [VIRT_ACPI_GED] =           { 0x09080000, ACPI_GED_EVT_SEL_LEN },
+    [VIRT_NVDIMM_ACPI] =        { 0x09090000, NVDIMM_ACPI_IO_LEN},
     [VIRT_MMIO] =               { 0x0a000000, 0x00000200 },
     /* ...repeating for a total of NUM_VIRTIO_TRANSPORTS, each of that size */
     [VIRT_PLATFORM_BUS] =       { 0x0c000000, 0x02000000 },
@@ -1884,6 +1885,18 @@ static void machvirt_init(MachineState *machine)
 
     create_platform_bus(vms);
 
+    if (machine->nvdimms_state->is_enabled) {
+        const struct AcpiGenericAddress arm_virt_nvdimm_acpi_dsmio = {
+            .space_id = AML_AS_SYSTEM_MEMORY,
+            .address = vms->memmap[VIRT_NVDIMM_ACPI].base,
+            .bit_width = NVDIMM_ACPI_IO_LEN << 3
+        };
+
+        nvdimm_init_acpi_state(machine->nvdimms_state, sysmem,
+                               arm_virt_nvdimm_acpi_dsmio,
+                               vms->fw_cfg, OBJECT(vms));
+    }
+
     vms->bootinfo.ram_size = machine->ram_size;
     vms->bootinfo.nb_cpus = smp_cpus;
     vms->bootinfo.board_id = -1;
@@ -2095,6 +2108,8 @@ static void virt_memory_plug(HotplugHandler *hotplug_dev,
                              DeviceState *dev, Error **errp)
 {
     VirtMachineState *vms = VIRT_MACHINE(hotplug_dev);
+    MachineState *ms = MACHINE(hotplug_dev);
+    bool is_nvdimm = object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM);
     Error *local_err = NULL;
 
     pc_dimm_plug(PC_DIMM(dev), MACHINE(vms), &local_err);
@@ -2102,6 +2117,10 @@ static void virt_memory_plug(HotplugHandler *hotplug_dev,
         goto out;
     }
 
+    if (is_nvdimm) {
+        nvdimm_plug(ms->nvdimms_state);
+    }
+
     hotplug_handler_plug(HOTPLUG_HANDLER(vms->acpi_dev),
                          dev, &error_abort);
 

hw/mem/Kconfig

@@ -8,4 +8,4 @@ config MEM_DEVICE
 config NVDIMM
     bool
     default y
-    depends on (PC || PSERIES)
+    depends on (PC || PSERIES || ARM_VIRT)

include/hw/arm/virt.h

@@ -79,6 +79,7 @@ enum {
     VIRT_SECURE_MEM,
     VIRT_PCDIMM_ACPI,
     VIRT_ACPI_GED,
+    VIRT_NVDIMM_ACPI,
     VIRT_LOWMEMMAP_LAST,
 };