Re: [Qemu-devel] [PATCH v3 02/10] acpi, mem-hotplug: Add acpi_memory_slot_status() to get MemStatus.

["Michael S. Tsirkin" <mst@redhat.com>]

On Tue, Mar 03, 2015 at 10:18:12AM +0800, Zhu Guihua wrote:
> 
> On 03/02/2015 01:31 AM, Michael S. Tsirkin wrote:
> >On Thu, Feb 26, 2015 at 09:16:44AM +0800, Zhu Guihua wrote:
> >>From: Tang Chen <tangchen@cn.fujitsu.com>
> >>
> >>Add a new API named acpi_memory_slot_status() to obtain a single memory
> >>slot status. Doing this is because this procedure will be used by other
> >>functions in the next coming patches.
> >>
> >>Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
> >>Signed-off-by: Zhu Guihua <zhugh.fnst@cn.fujitsu.com>
> >Same comments as everywhere: include implementation with
> >users.
> >In this case, I can't tell whether error_setg is
> >appropriate since I don't know whether the error
> >ever comes from user.
> 
> Do you have any suggestions about this error_setg?
> 
> Thanks,
> Zhu

If it's guest triggered, it probably shouldn't
print to monitor. If it's user triggered, then it should.

> >
> >>---
> >>  hw/acpi/memory_hotplug.c | 26 +++++++++++++++++++-------
> >>  1 file changed, 19 insertions(+), 7 deletions(-)
> >>
> >>diff --git a/hw/acpi/memory_hotplug.c b/hw/acpi/memory_hotplug.c
> >>index c6580da..6d91a0d 100644
> >>--- a/hw/acpi/memory_hotplug.c
> >>+++ b/hw/acpi/memory_hotplug.c
> >>@@ -163,29 +163,41 @@ void acpi_memory_hotplug_init(MemoryRegion *as, Object *owner,
> >>      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)
> >>+static MemStatus *
> >>+acpi_memory_slot_status(MemHotplugState *mem_st,
> >>+                        DeviceState *dev, Error **errp)
> >>  {
> >>-    MemStatus *mdev;
> >>      Error *local_err = NULL;
> >>      int slot = object_property_get_int(OBJECT(dev), PC_DIMM_SLOT_PROP,
> >>                                         &local_err);
> >>      if (local_err) {
> >>          error_propagate(errp, local_err);
> >>-        return;
> >>+        return NULL;
> >>      }
> >>      if (slot >= mem_st->dev_count) {
> >>          char *dev_path = object_get_canonical_path(OBJECT(dev));
> >>-        error_setg(errp, "acpi_memory_plug_cb: "
> >>+        error_setg(errp, "acpi_memory_get_slot_status_descriptor: "
> >>                     "device [%s] returned invalid memory slot[%d]",
> >>-                    dev_path, slot);
> >>+                   dev_path, slot);
> >>          g_free(dev_path);
> >>+        return NULL;
> >>+    }
> >>+
> >>+    return &mem_st->devs[slot];
> >>+}
> >>+
> >>+void acpi_memory_plug_cb(ACPIREGS *ar, qemu_irq irq, MemHotplugState *mem_st,
> >>+                         DeviceState *dev, Error **errp)
> >>+{
> >>+    MemStatus *mdev;
> >>+
> >>+    mdev = acpi_memory_slot_status(mem_st, dev, errp);
> >>+    if (!mdev) {
> >>          return;
> >>      }
> >>-    mdev = &mem_st->devs[slot];
> >>      mdev->dimm = dev;
> >>      mdev->is_enabled = true;
> >>      mdev->is_inserting = true;
> >>-- 
> >>1.9.3
> >.
> >