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Diffstat (limited to 'hw/acpi/memory_hotplug.c')
-rw-r--r--hw/acpi/memory_hotplug.c245
1 files changed, 245 insertions, 0 deletions
diff --git a/hw/acpi/memory_hotplug.c b/hw/acpi/memory_hotplug.c
new file mode 100644
index 0000000000..de4ddc204f
--- /dev/null
+++ b/hw/acpi/memory_hotplug.c
@@ -0,0 +1,245 @@
+#include "hw/acpi/memory_hotplug.h"
+#include "hw/acpi/pc-hotplug.h"
+#include "hw/mem/pc-dimm.h"
+#include "hw/boards.h"
+#include "trace.h"
+#include "qapi-visit.h"
+#include "monitor/monitor.h"
+#include "qapi/dealloc-visitor.h"
+#include "qapi/qmp-output-visitor.h"
+
+static ACPIOSTInfo *acpi_memory_device_status(int slot, MemStatus *mdev)
+{
+ ACPIOSTInfo *info = g_new0(ACPIOSTInfo, 1);
+
+ info->slot_type = ACPI_SLOT_TYPE_DIMM;
+ info->slot = g_strdup_printf("%d", slot);
+ info->source = mdev->ost_event;
+ info->status = mdev->ost_status;
+ if (mdev->dimm) {
+ DeviceState *dev = DEVICE(mdev->dimm);
+ if (dev->id) {
+ info->device = g_strdup(dev->id);
+ info->has_device = true;
+ }
+ }
+ return info;
+}
+
+void acpi_memory_ospm_status(MemHotplugState *mem_st, ACPIOSTInfoList ***list)
+{
+ int i;
+
+ for (i = 0; i < mem_st->dev_count; i++) {
+ ACPIOSTInfoList *elem = g_new0(ACPIOSTInfoList, 1);
+ elem->value = acpi_memory_device_status(i, &mem_st->devs[i]);
+ elem->next = NULL;
+ **list = elem;
+ *list = &elem->next;
+ }
+}
+
+static void acpi_memory_ost_mon_event(const MemHotplugState *mem_st)
+{
+ Visitor *v;
+ QObject *out_info;
+ QapiDeallocVisitor *md;
+ QmpOutputVisitor *mo = qmp_output_visitor_new();
+ MemStatus *mdev = &mem_st->devs[mem_st->selector];
+ ACPIOSTInfo *info = acpi_memory_device_status(mem_st->selector, mdev);
+
+ v = qmp_output_get_visitor(mo);
+ visit_type_ACPIOSTInfo(v, &info, "unused", NULL);
+
+ out_info = qmp_output_get_qobject(mo);
+ monitor_protocol_event(QEVENT_ACPI_OST, out_info);
+ qobject_decref(out_info);
+
+ qmp_output_visitor_cleanup(mo);
+ md = qapi_dealloc_visitor_new();
+ v = qapi_dealloc_get_visitor(md);
+ visit_type_ACPIOSTInfo(v, &info, "unused", NULL);
+ qapi_dealloc_visitor_cleanup(md);
+}
+
+static uint64_t acpi_memory_hotplug_read(void *opaque, hwaddr addr,
+ unsigned int size)
+{
+ uint32_t val = 0;
+ MemHotplugState *mem_st = opaque;
+ MemStatus *mdev;
+ Object *o;
+
+ if (mem_st->selector >= mem_st->dev_count) {
+ trace_mhp_acpi_invalid_slot_selected(mem_st->selector);
+ return 0;
+ }
+
+ mdev = &mem_st->devs[mem_st->selector];
+ o = OBJECT(mdev->dimm);
+ switch (addr) {
+ case 0x0: /* Lo part of phys address where DIMM is mapped */
+ val = o ? object_property_get_int(o, PC_DIMM_ADDR_PROP, NULL) : 0;
+ trace_mhp_acpi_read_addr_lo(mem_st->selector, val);
+ break;
+ case 0x4: /* Hi part of phys address where DIMM is mapped */
+ val = o ? object_property_get_int(o, PC_DIMM_ADDR_PROP, NULL) >> 32 : 0;
+ trace_mhp_acpi_read_addr_hi(mem_st->selector, val);
+ break;
+ case 0x8: /* Lo part of DIMM size */
+ val = o ? object_property_get_int(o, PC_DIMM_SIZE_PROP, NULL) : 0;
+ trace_mhp_acpi_read_size_lo(mem_st->selector, val);
+ break;
+ case 0xc: /* Hi part of DIMM size */
+ val = o ? object_property_get_int(o, PC_DIMM_SIZE_PROP, NULL) >> 32 : 0;
+ trace_mhp_acpi_read_size_hi(mem_st->selector, val);
+ break;
+ case 0x10: /* node proximity for _PXM method */
+ val = o ? object_property_get_int(o, PC_DIMM_NODE_PROP, NULL) : 0;
+ trace_mhp_acpi_read_pxm(mem_st->selector, val);
+ break;
+ case 0x14: /* pack and return is_* fields */
+ val |= mdev->is_enabled ? 1 : 0;
+ val |= mdev->is_inserting ? 2 : 0;
+ trace_mhp_acpi_read_flags(mem_st->selector, val);
+ break;
+ default:
+ val = ~0;
+ break;
+ }
+ return val;
+}
+
+static void acpi_memory_hotplug_write(void *opaque, hwaddr addr, uint64_t data,
+ unsigned int size)
+{
+ MemHotplugState *mem_st = opaque;
+ MemStatus *mdev;
+
+ if (!mem_st->dev_count) {
+ return;
+ }
+
+ if (addr) {
+ if (mem_st->selector >= mem_st->dev_count) {
+ trace_mhp_acpi_invalid_slot_selected(mem_st->selector);
+ return;
+ }
+ }
+
+ switch (addr) {
+ case 0x0: /* DIMM slot selector */
+ mem_st->selector = data;
+ trace_mhp_acpi_write_slot(mem_st->selector);
+ break;
+ case 0x4: /* _OST event */
+ mdev = &mem_st->devs[mem_st->selector];
+ if (data == 1) {
+ /* TODO: handle device insert OST event */
+ } else if (data == 3) {
+ /* TODO: handle device remove OST event */
+ }
+ mdev->ost_event = data;
+ trace_mhp_acpi_write_ost_ev(mem_st->selector, mdev->ost_event);
+ break;
+ case 0x8: /* _OST status */
+ mdev = &mem_st->devs[mem_st->selector];
+ mdev->ost_status = data;
+ trace_mhp_acpi_write_ost_status(mem_st->selector, mdev->ost_status);
+ /* TODO: implement memory removal on guest signal */
+ acpi_memory_ost_mon_event(mem_st);
+ break;
+ case 0x14:
+ mdev = &mem_st->devs[mem_st->selector];
+ if (data & 2) { /* clear insert event */
+ mdev->is_inserting = false;
+ trace_mhp_acpi_clear_insert_evt(mem_st->selector);
+ }
+ break;
+ }
+
+}
+static const MemoryRegionOps acpi_memory_hotplug_ops = {
+ .read = acpi_memory_hotplug_read,
+ .write = acpi_memory_hotplug_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ .valid = {
+ .min_access_size = 1,
+ .max_access_size = 4,
+ },
+};
+
+void acpi_memory_hotplug_init(MemoryRegion *as, Object *owner,
+ MemHotplugState *state)
+{
+ MachineState *machine = MACHINE(qdev_get_machine());
+
+ state->dev_count = machine->ram_slots;
+ if (!state->dev_count) {
+ return;
+ }
+
+ state->devs = g_malloc0(sizeof(*state->devs) * state->dev_count);
+ memory_region_init_io(&state->io, owner, &acpi_memory_hotplug_ops, state,
+ "apci-mem-hotplug", ACPI_MEMORY_HOTPLUG_IO_LEN);
+ memory_region_add_subregion(as, ACPI_MEMORY_HOTPLUG_BASE, &state->io);
+}
+
+void acpi_memory_plug_cb(ACPIREGS *ar, qemu_irq irq, MemHotplugState *mem_st,
+ DeviceState *dev, Error **errp)
+{
+ MemStatus *mdev;
+ Error *local_err = NULL;
+ int slot = object_property_get_int(OBJECT(dev), "slot", &local_err);
+
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
+ }
+
+ if (slot >= mem_st->dev_count) {
+ char *dev_path = object_get_canonical_path(OBJECT(dev));
+ error_setg(errp, "acpi_memory_plug_cb: "
+ "device [%s] returned invalid memory slot[%d]",
+ dev_path, slot);
+ g_free(dev_path);
+ return;
+ }
+
+ mdev = &mem_st->devs[slot];
+ mdev->dimm = dev;
+ mdev->is_enabled = true;
+ mdev->is_inserting = true;
+
+ /* do ACPI magic */
+ ar->gpe.sts[0] |= ACPI_MEMORY_HOTPLUG_STATUS;
+ acpi_update_sci(ar, irq);
+ return;
+}
+
+static const VMStateDescription vmstate_memhp_sts = {
+ .name = "memory hotplug device state",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .minimum_version_id_old = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_BOOL(is_enabled, MemStatus),
+ VMSTATE_BOOL(is_inserting, MemStatus),
+ VMSTATE_UINT32(ost_event, MemStatus),
+ VMSTATE_UINT32(ost_status, MemStatus),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+const VMStateDescription vmstate_memory_hotplug = {
+ .name = "memory hotplug state",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .minimum_version_id_old = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(selector, MemHotplugState),
+ VMSTATE_STRUCT_VARRAY_POINTER_UINT32(devs, MemHotplugState, dev_count,
+ vmstate_memhp_sts, MemStatus),
+ VMSTATE_END_OF_LIST()
+ }
+};
generated by cgit v1.2.3 (git 2.26.2) at 2025-01-02 13:28:17 +0000