diff mbox

[09/10] isa: Clean up use of cannot_instantiate_with_device_add_yet

Message ID 1382018101-6102-10-git-send-email-armbru@redhat.com
State New
Headers show

Commit Message

Markus Armbruster Oct. 17, 2013, 1:55 p.m. UTC 
From: Markus Armbruster <armbru@redhat.com>

Drop it when there's no obvious reason why device_add could not work.
Else keep and document why.

* isa-fdc, port92, i8042, m48t59_isa, mc146818rtc, isa-pit, kvm-pit:
  drop (from the last two by dropping it from their abstract base
  pit-common)

* pcspk: keep because of pointer property pit, and because realize
  sets global pcspk_state

* vmmouse: keep because of pointer property ps2_mouse

* vmport: keep because realize sets global port_state

* isa-i8259, kvm-i8259: keep (in their abstract base pic-common),
  because the PICs need additional wiring: its IRQ input lines are set
  up by board code, and the wiring of the slave to the master is
  hard-coded in device model code.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
---
 hw/audio/pcspk.c        | 3 ++-
 hw/block/fdc.c          | 1 -
 hw/i386/pc.c            | 1 -
 hw/input/pckbd.c        | 1 -
 hw/input/vmmouse.c      | 3 ++-
 hw/intc/i8259_common.c  | 8 +++++++-
 hw/misc/vmport.c        | 3 ++-
 hw/timer/i8254_common.c | 1 -
 hw/timer/m48t59.c       | 1 -
 hw/timer/mc146818rtc.c  | 1 -
 10 files changed, 13 insertions(+), 10 deletions(-)

Comments

Peter Maydell Oct. 23, 2013, 10:05 a.m. UTC | #1 
On 17 October 2013 14:55,  <armbru@redhat.com> wrote:
> From: Markus Armbruster <armbru@redhat.com>
>
> Drop it when there's no obvious reason why device_add could not work.
> Else keep and document why.
>
> * isa-fdc, port92, i8042, m48t59_isa, mc146818rtc, isa-pit, kvm-pit:
>   drop (from the last two by dropping it from their abstract base
>   pit-common)

port92 needs its a20_out qemu_irq line wiring up, doesn't it?

the pit devices have an output IRQ line that needs wiring up.

-- PMM
Markus Armbruster Oct. 24, 2013, 9:02 a.m. UTC | #2 
Peter Maydell <peter.maydell@linaro.org> writes:

> On 17 October 2013 14:55,  <armbru@redhat.com> wrote:
>> From: Markus Armbruster <armbru@redhat.com>
>>
>> Drop it when there's no obvious reason why device_add could not work.
>> Else keep and document why.
>>
>> * isa-fdc, port92, i8042, m48t59_isa, mc146818rtc, isa-pit, kvm-pit:
>>   drop (from the last two by dropping it from their abstract base
>>   pit-common)
>
> port92 needs its a20_out qemu_irq line wiring up, doesn't it?
>
> the pit devices have an output IRQ line that needs wiring up.

Good points; I'll have a second look at these two.  Thanks!
diff mbox

Patch

diff --git a/hw/audio/pcspk.c b/hw/audio/pcspk.c
index 8e3e178..f980d66 100644
--- a/hw/audio/pcspk.c
+++ b/hw/audio/pcspk.c
@@ -192,8 +192,9 @@  static void pcspk_class_initfn(ObjectClass *klass, void *data)
 
     dc->realize = pcspk_realizefn;
     set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
-    dc->cannot_instantiate_with_device_add_yet = true; /* FIXME explain why */
     dc->props = pcspk_properties;
+    /* Reason: pointer property "pit", realize sets global pcspk_state */
+    dc->cannot_instantiate_with_device_add_yet = true;
 }
 
 static const TypeInfo pcspk_info = {
diff --git a/hw/block/fdc.c b/hw/block/fdc.c
index 86f4920..592b58f 100644
--- a/hw/block/fdc.c
+++ b/hw/block/fdc.c
@@ -2234,7 +2234,6 @@  static void isabus_fdc_class_init(ObjectClass *klass, void *data)
 
     dc->realize = isabus_fdc_realize;
     dc->fw_name = "fdc";
-    dc->cannot_instantiate_with_device_add_yet = true; /* FIXME explain why */
     dc->reset = fdctrl_external_reset_isa;
     dc->vmsd = &vmstate_isa_fdc;
     dc->props = isa_fdc_properties;
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index fe33843..bebda79 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -544,7 +544,6 @@  static void port92_class_initfn(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
-    dc->cannot_instantiate_with_device_add_yet = true; /* FIXME explain why */
     dc->realize = port92_realizefn;
     dc->reset = port92_reset;
     dc->vmsd = &vmstate_port92_isa;
diff --git a/hw/input/pckbd.c b/hw/input/pckbd.c
index dee31a6..655b8c5 100644
--- a/hw/input/pckbd.c
+++ b/hw/input/pckbd.c
@@ -522,7 +522,6 @@  static void i8042_class_initfn(ObjectClass *klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->realize = i8042_realizefn;
-    dc->cannot_instantiate_with_device_add_yet = true; /* FIXME explain why */
     dc->vmsd = &vmstate_kbd_isa;
 }
 
diff --git a/hw/input/vmmouse.c b/hw/input/vmmouse.c
index 600e4a2..6a50533 100644
--- a/hw/input/vmmouse.c
+++ b/hw/input/vmmouse.c
@@ -282,10 +282,11 @@  static void vmmouse_class_initfn(ObjectClass *klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->realize = vmmouse_realizefn;
-    dc->cannot_instantiate_with_device_add_yet = true; /* FIXME explain why */
     dc->reset = vmmouse_reset;
     dc->vmsd = &vmstate_vmmouse;
     dc->props = vmmouse_properties;
+    /* Reason: pointer property "ps2_mouse" */
+    dc->cannot_instantiate_with_device_add_yet = true;
 }
 
 static const TypeInfo vmmouse_info = {
diff --git a/hw/intc/i8259_common.c b/hw/intc/i8259_common.c
index 2acdbfe..9d29399 100644
--- a/hw/intc/i8259_common.c
+++ b/hw/intc/i8259_common.c
@@ -135,9 +135,15 @@  static void pic_common_class_init(ObjectClass *klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->vmsd = &vmstate_pic_common;
-    dc->cannot_instantiate_with_device_add_yet = true; /* FIXME explain why */
     dc->props = pic_properties_common;
     dc->realize = pic_common_realize;
+    /*
+     * Reason: unlike ordinary ISA devices, the PICs need additional
+     * wiring: its IRQ input lines are set up by board code, and the
+     * wiring of the slave to the master is hard-coded in device model
+     * code.
+     */
+    dc->cannot_instantiate_with_device_add_yet = true;
 }
 
 static const TypeInfo pic_common_type = {
diff --git a/hw/misc/vmport.c b/hw/misc/vmport.c
index 94ae6ae..cd5716a 100644
--- a/hw/misc/vmport.c
+++ b/hw/misc/vmport.c
@@ -162,7 +162,8 @@  static void vmport_class_initfn(ObjectClass *klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->realize = vmport_realizefn;
-    dc->cannot_instantiate_with_device_add_yet = true; /* FIXME explain why */
+    /* Reason: realize sets global port_state */
+    dc->cannot_instantiate_with_device_add_yet = true;
 }
 
 static const TypeInfo vmport_info = {
diff --git a/hw/timer/i8254_common.c b/hw/timer/i8254_common.c
index dc2196c..2236369 100644
--- a/hw/timer/i8254_common.c
+++ b/hw/timer/i8254_common.c
@@ -282,7 +282,6 @@  static void pit_common_class_init(ObjectClass *klass, void *data)
 
     dc->realize = pit_common_realize;
     dc->vmsd = &vmstate_pit_common;
-    dc->cannot_instantiate_with_device_add_yet = true; /* FIXME explain why */
 }
 
 static const TypeInfo pit_common_type = {
diff --git a/hw/timer/m48t59.c b/hw/timer/m48t59.c
index f81cf48..c0dfb51 100644
--- a/hw/timer/m48t59.c
+++ b/hw/timer/m48t59.c
@@ -750,7 +750,6 @@  static void m48t59_isa_class_init(ObjectClass *klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->realize = m48t59_isa_realize;
-    dc->cannot_instantiate_with_device_add_yet = true; /* FIXME explain why */
     dc->reset = m48t59_reset_isa;
     dc->props = m48t59_isa_properties;
 }
diff --git a/hw/timer/mc146818rtc.c b/hw/timer/mc146818rtc.c
index 2f58220..2faef13 100644
--- a/hw/timer/mc146818rtc.c
+++ b/hw/timer/mc146818rtc.c
@@ -906,7 +906,6 @@  static void rtc_class_initfn(ObjectClass *klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->realize = rtc_realizefn;
-    dc->cannot_instantiate_with_device_add_yet = true; /* FIXME explain why */
     dc->vmsd = &vmstate_rtc;
     dc->props = mc146818rtc_properties;
 }