On 11/02/2016 07:19 PM, Igor Mammedov wrote:
On Sun, 30 Oct 2016 23:25:10 +0200 "Michael S. Tsirkin" <m...@redhat.com> wrote:From: Xiao Guangrong <guangrong.x...@linux.intel.com> _GPE.E04 is dedicated for nvdimm device hotplug Signed-off-by: Xiao Guangrong <guangrong.x...@linux.intel.com> Reviewed-by: Michael S. Tsirkin <m...@redhat.com> Signed-off-by: Michael S. Tsirkin <m...@redhat.com> --- include/hw/acpi/acpi_dev_interface.h | 1 + hw/acpi/memory_hotplug.c | 31 +++++++++++++++++++++++-------- hw/i386/acpi-build.c | 7 +++++++ hw/i386/pc.c | 12 ++++++++++++ hw/mem/nvdimm.c | 4 ---- docs/specs/acpi_mem_hotplug.txt | 3 +++ 6 files changed, 46 insertions(+), 12 deletions(-) diff --git a/include/hw/acpi/acpi_dev_interface.h b/include/hw/acpi/acpi_dev_interface.h index da4ef7f..901a4ae 100644 --- a/include/hw/acpi/acpi_dev_interface.h +++ b/include/hw/acpi/acpi_dev_interface.h @@ -10,6 +10,7 @@ typedef enum { ACPI_PCI_HOTPLUG_STATUS = 2, ACPI_CPU_HOTPLUG_STATUS = 4, ACPI_MEMORY_HOTPLUG_STATUS = 8, + ACPI_NVDIMM_HOTPLUG_STATUS = 16, } AcpiEventStatusBits; #define TYPE_ACPI_DEVICE_IF "acpi-device-interface" diff --git a/hw/acpi/memory_hotplug.c b/hw/acpi/memory_hotplug.c index ec4e64b..70f6451 100644 --- a/hw/acpi/memory_hotplug.c +++ b/hw/acpi/memory_hotplug.c @@ -2,6 +2,7 @@ #include "hw/acpi/memory_hotplug.h" #include "hw/acpi/pc-hotplug.h" #include "hw/mem/pc-dimm.h" +#include "hw/mem/nvdimm.h" #include "hw/boards.h" #include "hw/qdev-core.h" #include "trace.h" @@ -232,11 +233,8 @@ void acpi_memory_plug_cb(HotplugHandler *hotplug_dev, MemHotplugState *mem_st, DeviceState *dev, Error **errp) { MemStatus *mdev; - DeviceClass *dc = DEVICE_GET_CLASS(dev); - - if (!dc->hotpluggable) { - return; - }shouldn't be removed.
Well, all memory devices support hotplug now, i thought it is reasonable to drop it, actually it was introduced by nvdimm...
+ AcpiEventStatusBits event; + bool is_nvdimm = object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM); mdev = acpi_memory_slot_status(mem_st, dev, errp); if (!mdev) { @@ -244,10 +242,23 @@ void acpi_memory_plug_cb(HotplugHandler *hotplug_dev, MemHotplugState *mem_st, } mdev->dimm = dev; - mdev->is_enabled = true; + + /* + * do not set is_enabled and is_inserting if the slot is plugged with + * a nvdimm device to stop OSPM inquires memory region from the slot. + */ + if (is_nvdimm) { + event = ACPI_NVDIMM_HOTPLUG_STATUS; + } else { + mdev->is_enabled = true; + event = ACPI_MEMORY_HOTPLUG_STATUS; + } + if (dev->hotplugged) { - mdev->is_inserting = true; - acpi_send_event(DEVICE(hotplug_dev), ACPI_MEMORY_HOTPLUG_STATUS); + if (!is_nvdimm) { + mdev->is_inserting = true; + } + acpi_send_event(DEVICE(hotplug_dev), event); } } @@ -262,6 +273,8 @@ void acpi_memory_unplug_request_cb(HotplugHandler *hotplug_dev, return; } + /* nvdimm device hot unplug is not supported yet. */ + assert(!object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM));that would crash guest instead of failing gracefully as it's supposed to.
This is really a bug if it is triggered as nvdimm hot unplug is stopped in the upper caller.
