From c06b2ffb02bfcc642c67300d2c4dffd5aa54932b Mon Sep 17 00:00:00 2001 From: Zhu Guihua Date: Mon, 27 Apr 2015 16:47:21 +0800 Subject: [PATCH] acpi: add hardware implementation for memory hot unplug - implements QEMU hardware part of memory hot unplug protocol described at "docs/spec/acpi_mem_hotplug.txt" - handles memory remove notification event - handles device eject notification Reviewed-by: Igor Mammedov Signed-off-by: Zhu Guihua Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- docs/specs/acpi_mem_hotplug.txt | 11 +++++++++-- hw/acpi/memory_hotplug.c | 21 ++++++++++++++++++++- hw/core/qdev.c | 2 +- hw/i386/acpi-build.c | 12 ++++++++++++ hw/i386/acpi-dsdt-mem-hotplug.dsl | 13 ++++++++++++- include/hw/acpi/pc-hotplug.h | 3 +++ include/hw/qdev-core.h | 1 + trace-events | 3 +++ 8 files changed, 61 insertions(+), 5 deletions(-) diff --git a/docs/specs/acpi_mem_hotplug.txt b/docs/specs/acpi_mem_hotplug.txt index 68daa14..3df3620 100644 --- a/docs/specs/acpi_mem_hotplug.txt +++ b/docs/specs/acpi_mem_hotplug.txt @@ -19,7 +19,9 @@ Memory hot-plug interface (IO port 0xa00-0xa17, 1-4 byte access): 1: Device insert event, used to distinguish device for which no device check event to OSPM was issued. It's valid only when bit 1 is set. - 2-7: reserved and should be ignored by OSPM + 2: Device remove event, used to distinguish device for which + no device eject request to OSPM was issued. + 3-7: reserved and should be ignored by OSPM [0x15-0x17] reserved write access: @@ -38,7 +40,12 @@ Memory hot-plug interface (IO port 0xa00-0xa17, 1-4 byte access): 1: if set to 1 clears device insert event, set by OSPM after it has emitted device check event for the selected memory device - 2-7: reserved, OSPM must clear them before writing to register + 2: if set to 1 clears device remove event, set by OSPM + after it has emitted device eject request for the + selected memory device + 3: if set to 1 initiates device eject, set by OSPM when it + triggers memory device removal and calls _EJ0 method + 4-7: reserved, OSPM must clear them before writing to register Selecting memory device slot beyond present range has no effect on platform: - write accesses to memory hot-plug registers not documented above are diff --git a/hw/acpi/memory_hotplug.c b/hw/acpi/memory_hotplug.c index 07e281f..35bbfeb 100644 --- a/hw/acpi/memory_hotplug.c +++ b/hw/acpi/memory_hotplug.c @@ -2,6 +2,7 @@ #include "hw/acpi/pc-hotplug.h" #include "hw/mem/pc-dimm.h" #include "hw/boards.h" +#include "hw/qdev-core.h" #include "trace.h" #include "qapi-event.h" @@ -91,6 +92,8 @@ static void acpi_memory_hotplug_write(void *opaque, hwaddr addr, uint64_t data, MemHotplugState *mem_st = opaque; MemStatus *mdev; ACPIOSTInfo *info; + DeviceState *dev = NULL; + HotplugHandler *hotplug_ctrl = NULL; if (!mem_st->dev_count) { return; @@ -128,13 +131,29 @@ static void acpi_memory_hotplug_write(void *opaque, hwaddr addr, uint64_t data, qapi_event_send_acpi_device_ost(info, &error_abort); qapi_free_ACPIOSTInfo(info); break; - case 0x14: + case 0x14: /* set is_* fields */ 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); + } else if (data & 4) { + mdev->is_removing = false; + trace_mhp_acpi_clear_remove_evt(mem_st->selector); + } else if (data & 8) { + if (!mdev->is_enabled) { + trace_mhp_acpi_ejecting_invalid_slot(mem_st->selector); + break; + } + + dev = DEVICE(mdev->dimm); + hotplug_ctrl = qdev_get_hotplug_handler(dev); + /* call pc-dimm unplug cb */ + hotplug_handler_unplug(hotplug_ctrl, dev, NULL); + trace_mhp_acpi_pc_dimm_deleted(mem_st->selector); } break; + default: + break; } } diff --git a/hw/core/qdev.c b/hw/core/qdev.c index 6e6a65d..b0f0f84 100644 --- a/hw/core/qdev.c +++ b/hw/core/qdev.c @@ -273,7 +273,7 @@ void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id, dev->alias_required_for_version = required_for_version; } -static HotplugHandler *qdev_get_hotplug_handler(DeviceState *dev) +HotplugHandler *qdev_get_hotplug_handler(DeviceState *dev) { HotplugHandler *hotplug_ctrl = NULL; diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index 4202d76..967448a 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -879,6 +879,12 @@ build_ssdt(GArray *table_data, GArray *linker, aml_append(field, /*(read) 1 if has a insert event. (write) 1 to clear event */ aml_named_field(stringify(MEMORY_SLOT_INSERT_EVENT), 1)); + aml_append(field, + /* (read) 1 if has a remove event. (write) 1 to clear event */ + aml_named_field(stringify(MEMORY_SLOT_REMOVE_EVENT), 1)); + aml_append(field, + /* initiates device eject, write only */ + aml_named_field(stringify(MEMORY_SLOT_EJECT), 1)); aml_append(scope, field); field = aml_field(stringify(MEMORY_HOTPLUG_IO_REGION), aml_dword_acc, @@ -923,6 +929,12 @@ build_ssdt(GArray *table_data, GArray *linker, ))); aml_append(dev, method); + method = aml_method("_EJ0", 1); + s = BASEPATH stringify(MEMORY_SLOT_EJECT_METHOD); + aml_append(method, aml_return(aml_call2( + s, aml_name("_UID"), aml_arg(0)))); + aml_append(dev, method); + aml_append(sb_scope, dev); } diff --git a/hw/i386/acpi-dsdt-mem-hotplug.dsl b/hw/i386/acpi-dsdt-mem-hotplug.dsl index 1e9ec39..c2bb6a1 100644 --- a/hw/i386/acpi-dsdt-mem-hotplug.dsl +++ b/hw/i386/acpi-dsdt-mem-hotplug.dsl @@ -29,6 +29,8 @@ External(MEMORY_SLOT_PROXIMITY, FieldUnitObj) // read only External(MEMORY_SLOT_ENABLED, FieldUnitObj) // 1 if enabled, read only External(MEMORY_SLOT_INSERT_EVENT, FieldUnitObj) // (read) 1 if has a insert event. (write) 1 to clear event + External(MEMORY_SLOT_REMOVE_EVENT, FieldUnitObj) // (read) 1 if has a remove event. (write) 1 to clear event + External(MEMORY_SLOT_EJECT, FieldUnitObj) // initiates device eject, write only External(MEMORY_SLOT_SLECTOR, FieldUnitObj) // DIMM selector, write only External(MEMORY_SLOT_OST_EVENT, FieldUnitObj) // _OST event code, write only External(MEMORY_SLOT_OST_STATUS, FieldUnitObj) // _OST status code, write only @@ -55,8 +57,10 @@ If (LEqual(MEMORY_SLOT_INSERT_EVENT, One)) { // Memory device needs check MEMORY_SLOT_NOTIFY_METHOD(Local0, 1) Store(1, MEMORY_SLOT_INSERT_EVENT) + } Elseif (LEqual(MEMORY_SLOT_REMOVE_EVENT, One)) { // Ejection request + MEMORY_SLOT_NOTIFY_METHOD(Local0, 3) + Store(1, MEMORY_SLOT_REMOVE_EVENT) } - // TODO: handle memory eject request Add(Local0, One, Local0) // goto next DIMM } Release(MEMORY_SLOT_LOCK) @@ -156,5 +160,12 @@ Store(Arg2, MEMORY_SLOT_OST_STATUS) Release(MEMORY_SLOT_LOCK) } + + Method(MEMORY_SLOT_EJECT_METHOD, 2) { + Acquire(MEMORY_SLOT_LOCK, 0xFFFF) + Store(ToInteger(Arg0), MEMORY_SLOT_SLECTOR) // select DIMM + Store(1, MEMORY_SLOT_EJECT) + Release(MEMORY_SLOT_LOCK) + } } // Device() } // Scope() diff --git a/include/hw/acpi/pc-hotplug.h b/include/hw/acpi/pc-hotplug.h index efa6ed7..0513c1c 100644 --- a/include/hw/acpi/pc-hotplug.h +++ b/include/hw/acpi/pc-hotplug.h @@ -43,6 +43,8 @@ #define MEMORY_SLOT_PROXIMITY MPX #define MEMORY_SLOT_ENABLED MES #define MEMORY_SLOT_INSERT_EVENT MINS +#define MEMORY_SLOT_REMOVE_EVENT MRMV +#define MEMORY_SLOT_EJECT MEJ #define MEMORY_SLOT_SLECTOR MSEL #define MEMORY_SLOT_OST_EVENT MOEV #define MEMORY_SLOT_OST_STATUS MOSC @@ -51,6 +53,7 @@ #define MEMORY_SLOT_CRS_METHOD MCRS #define MEMORY_SLOT_OST_METHOD MOST #define MEMORY_SLOT_PROXIMITY_METHOD MPXM +#define MEMORY_SLOT_EJECT_METHOD MEJ0 #define MEMORY_SLOT_NOTIFY_METHOD MTFY #define MEMORY_SLOT_SCAN_METHOD MSCN diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h index 4e673f9..5b7acf1 100644 --- a/include/hw/qdev-core.h +++ b/include/hw/qdev-core.h @@ -266,6 +266,7 @@ int qdev_init(DeviceState *dev) QEMU_WARN_UNUSED_RESULT; void qdev_init_nofail(DeviceState *dev); void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id, int required_for_version); +HotplugHandler *qdev_get_hotplug_handler(DeviceState *dev); void qdev_unplug(DeviceState *dev, Error **errp); void qdev_simple_device_unplug_cb(HotplugHandler *hotplug_dev, DeviceState *dev, Error **errp); diff --git a/trace-events b/trace-events index 30eba92..46f6ef0 100644 --- a/trace-events +++ b/trace-events @@ -1562,6 +1562,7 @@ vfio_put_base_device(int fd) "close vdev->fd=%d" #hw/acpi/memory_hotplug.c mhp_acpi_invalid_slot_selected(uint32_t slot) "0x%"PRIx32 +mhp_acpi_ejecting_invalid_slot(uint32_t slot) "0x%"PRIx32 mhp_acpi_read_addr_lo(uint32_t slot, uint32_t addr) "slot[0x%"PRIx32"] addr lo: 0x%"PRIx32 mhp_acpi_read_addr_hi(uint32_t slot, uint32_t addr) "slot[0x%"PRIx32"] addr hi: 0x%"PRIx32 mhp_acpi_read_size_lo(uint32_t slot, uint32_t size) "slot[0x%"PRIx32"] size lo: 0x%"PRIx32 @@ -1572,6 +1573,8 @@ mhp_acpi_write_slot(uint32_t slot) "set active slot: 0x%"PRIx32 mhp_acpi_write_ost_ev(uint32_t slot, uint32_t ev) "slot[0x%"PRIx32"] OST EVENT: 0x%"PRIx32 mhp_acpi_write_ost_status(uint32_t slot, uint32_t st) "slot[0x%"PRIx32"] OST STATUS: 0x%"PRIx32 mhp_acpi_clear_insert_evt(uint32_t slot) "slot[0x%"PRIx32"] clear insert event" +mhp_acpi_clear_remove_evt(uint32_t slot) "slot[0x%"PRIx32"] clear remove event" +mhp_acpi_pc_dimm_deleted(uint32_t slot) "slot[0x%"PRIx32"] pc-dimm deleted" # hw/i386/pc.c mhp_pc_dimm_assigned_slot(int slot) "0x%d" -- 2.7.4