[PATCH v4 00/16] hw/pci-host/raven clean ups

[PATCH v4 00/16] hw/pci-host/raven clean ups

[BALATON Zoltan]

Hello,

This series cleans up and simplifies the raven model which does some
strange stuff that no other pci-host is doing and does it in a
convoluted way and also has some legacy bits that can be removed.
Apart from making the model much more readable this also fixes the
non-contiguous IO control bit which was there but did not work as it
was not connected but apparently it's not really used by any guest so
that wasn't noticed.

Regards,
BALATON Zoltan

Link to previous version:
https://patchew.org/QEMU/cover.1758219840.git.balaton@eik.bme.hu/

V4:
- added R-b tags from Mark and address some of his review comments
(other comments not addressed were answered on the list explaining why
I did not add them to this version)
- added new patches to fix creation and reset of prep-systemio
- rebased on master

V3:
- rebase on master
- Fix issue with device-crash-test reported by Akihiko Odaki: make
sure device is correctly used by adding assert and making it not user
creatable in patch 14.

v2:
- rebase on master
- add R-b tags from Philippe

BALATON Zoltan (16):
  hw/pci-host/raven: Simplify PCI facing part
  hw/pci-host/raven: Simplify host bridge type declaration
  hw/pci-host/raven: Use DEFINE_TYPES macro
  hw/pci-host/raven: Simplify PCI bus creation
  hw/pci-host/raven: Simplify PCI interrupt routing
  hw/pci-host/raven: Simplify direct config access address decoding
  hw/pci-host/raven: Rename direct config access ops
  hw/pci-host/raven: Use correct parameter in direct access ops
  hw/pci-host/raven: Do not use parent object for mmcfg region
  hw/pci-host/raven: Fix PCI config direct access region
  hw/pci-host/raven: Simpify discontiguous IO access
  hw/pci-host/raven: Move bus master address space creation to one place
  hw/pci-host/raven: Do not map regions in init method
  hw/ppc/prep: Always create prep-systemio
  hw/ppc/prep: Fix non-contiguous IO control bit
  hw/ppc/prep: Add reset method to prep-systemio

 hw/pci-host/raven.c       | 328 ++++++++++++--------------------------
 hw/ppc/prep.c             |  35 ++--
 hw/ppc/prep_systemio.c    |  26 ++-
 include/hw/pci/pci_host.h |   1 -
 4 files changed, 145 insertions(+), 245 deletions(-)

-- 
2.41.3

[PATCH v4 01/16] hw/pci-host/raven: Simplify PCI facing part

[BALATON Zoltan]

The raven PCI device does not need a state struct as it has no data to
store there any more, so we can remove that to simplify code.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
---
 hw/pci-host/raven.c | 30 +-----------------------------
 1 file changed, 1 insertion(+), 29 deletions(-)

diff --git a/hw/pci-host/raven.c b/hw/pci-host/raven.c
index f8c0be5d21..172f01694c 100644
--- a/hw/pci-host/raven.c
+++ b/hw/pci-host/raven.c
@@ -31,7 +31,6 @@
 #include "hw/pci/pci_bus.h"
 #include "hw/pci/pci_host.h"
 #include "hw/qdev-properties.h"
-#include "migration/vmstate.h"
 #include "hw/intc/i8259.h"
 #include "hw/irq.h"
 #include "hw/or-irq.h"
@@ -40,12 +39,6 @@
 #define TYPE_RAVEN_PCI_DEVICE "raven"
 #define TYPE_RAVEN_PCI_HOST_BRIDGE "raven-pcihost"
 
-OBJECT_DECLARE_SIMPLE_TYPE(RavenPCIState, RAVEN_PCI_DEVICE)
-
-struct RavenPCIState {
-    PCIDevice dev;
-};
-
 typedef struct PRePPCIState PREPPCIState;
 DECLARE_INSTANCE_CHECKER(PREPPCIState, RAVEN_PCI_HOST_BRIDGE,
                          TYPE_RAVEN_PCI_HOST_BRIDGE)
@@ -65,7 +58,6 @@ struct PRePPCIState {
     MemoryRegion bm_ram_alias;
     MemoryRegion bm_pci_memory_alias;
     AddressSpace bm_as;
-    RavenPCIState pci_dev;
 
     int contiguous_map;
 };
@@ -268,8 +260,7 @@ static void raven_pcihost_realizefn(DeviceState *d, Error **errp)
                           "pci-intack", 1);
     memory_region_add_subregion(address_space_mem, 0xbffffff0, &s->pci_intack);
 
-    /* TODO Remove once realize propagates to child devices. */
-    qdev_realize(DEVICE(&s->pci_dev), BUS(&s->pci_bus), errp);
+    pci_create_simple(&s->pci_bus, PCI_DEVFN(0, 0), TYPE_RAVEN_PCI_DEVICE);
 }
 
 static void raven_pcihost_initfn(Object *obj)
@@ -277,7 +268,6 @@ static void raven_pcihost_initfn(Object *obj)
     PCIHostState *h = PCI_HOST_BRIDGE(obj);
     PREPPCIState *s = RAVEN_PCI_HOST_BRIDGE(obj);
     MemoryRegion *address_space_mem = get_system_memory();
-    DeviceState *pci_dev;
 
     memory_region_init(&s->pci_io, obj, "pci-io", 0x3f800000);
     memory_region_init_io(&s->pci_io_non_contiguous, obj, &raven_io_ops, s,
@@ -314,12 +304,6 @@ static void raven_pcihost_initfn(Object *obj)
     pci_setup_iommu(&s->pci_bus, &raven_iommu_ops, s);
 
     h->bus = &s->pci_bus;
-
-    object_initialize(&s->pci_dev, sizeof(s->pci_dev), TYPE_RAVEN_PCI_DEVICE);
-    pci_dev = DEVICE(&s->pci_dev);
-    object_property_set_int(OBJECT(&s->pci_dev), "addr", PCI_DEVFN(0, 0),
-                            NULL);
-    qdev_prop_set_bit(pci_dev, "multifunction", false);
 }
 
 static void raven_realize(PCIDevice *d, Error **errp)
@@ -329,16 +313,6 @@ static void raven_realize(PCIDevice *d, Error **errp)
     d->config[PCI_CAPABILITY_LIST] = 0x00;
 }
 
-static const VMStateDescription vmstate_raven = {
-    .name = "raven",
-    .version_id = 0,
-    .minimum_version_id = 0,
-    .fields = (const VMStateField[]) {
-        VMSTATE_PCI_DEVICE(dev, RavenPCIState),
-        VMSTATE_END_OF_LIST()
-    },
-};
-
 static void raven_class_init(ObjectClass *klass, const void *data)
 {
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
@@ -350,7 +324,6 @@ static void raven_class_init(ObjectClass *klass, const void *data)
     k->revision = 0x00;
     k->class_id = PCI_CLASS_BRIDGE_HOST;
     dc->desc = "PReP Host Bridge - Motorola Raven";
-    dc->vmsd = &vmstate_raven;
     /*
      * Reason: PCI-facing part of the host bridge, not usable without
      * the host-facing part, which can't be device_add'ed, yet.
@@ -361,7 +334,6 @@ static void raven_class_init(ObjectClass *klass, const void *data)
 static const TypeInfo raven_info = {
     .name = TYPE_RAVEN_PCI_DEVICE,
     .parent = TYPE_PCI_DEVICE,
-    .instance_size = sizeof(RavenPCIState),
     .class_init = raven_class_init,
     .interfaces = (const InterfaceInfo[]) {
         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
-- 
2.41.3

Re: [PATCH v4 01/16] hw/pci-host/raven: Simplify PCI facing part

[Philippe Mathieu-Daudé]

On 18/10/25 16:04, BALATON Zoltan wrote:
> The raven PCI device does not need a state struct as it has no data to
> store there any more, so we can remove that to simplify code.
> 
> Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
> ---
>   hw/pci-host/raven.c | 30 +-----------------------------
>   1 file changed, 1 insertion(+), 29 deletions(-)
> 
> diff --git a/hw/pci-host/raven.c b/hw/pci-host/raven.c
> index f8c0be5d21..172f01694c 100644
> --- a/hw/pci-host/raven.c
> +++ b/hw/pci-host/raven.c
> @@ -31,7 +31,6 @@
>   #include "hw/pci/pci_bus.h"
>   #include "hw/pci/pci_host.h"
>   #include "hw/qdev-properties.h"
> -#include "migration/vmstate.h"
>   #include "hw/intc/i8259.h"
>   #include "hw/irq.h"
>   #include "hw/or-irq.h"
> @@ -40,12 +39,6 @@
>   #define TYPE_RAVEN_PCI_DEVICE "raven"
>   #define TYPE_RAVEN_PCI_HOST_BRIDGE "raven-pcihost"
>   
> -OBJECT_DECLARE_SIMPLE_TYPE(RavenPCIState, RAVEN_PCI_DEVICE)
> -
> -struct RavenPCIState {
> -    PCIDevice dev;
> -};
> -
>   typedef struct PRePPCIState PREPPCIState;
>   DECLARE_INSTANCE_CHECKER(PREPPCIState, RAVEN_PCI_HOST_BRIDGE,
>                            TYPE_RAVEN_PCI_HOST_BRIDGE)
> @@ -65,7 +58,6 @@ struct PRePPCIState {
>       MemoryRegion bm_ram_alias;
>       MemoryRegion bm_pci_memory_alias;
>       AddressSpace bm_as;
> -    RavenPCIState pci_dev;
>   
>       int contiguous_map;
>   };
> @@ -268,8 +260,7 @@ static void raven_pcihost_realizefn(DeviceState *d, Error **errp)
>                             "pci-intack", 1);
>       memory_region_add_subregion(address_space_mem, 0xbffffff0, &s->pci_intack);
>   
> -    /* TODO Remove once realize propagates to child devices. */
> -    qdev_realize(DEVICE(&s->pci_dev), BUS(&s->pci_bus), errp);
> +    pci_create_simple(&s->pci_bus, PCI_DEVFN(0, 0), TYPE_RAVEN_PCI_DEVICE);
>   }
>   
>   static void raven_pcihost_initfn(Object *obj)
> @@ -277,7 +268,6 @@ static void raven_pcihost_initfn(Object *obj)
>       PCIHostState *h = PCI_HOST_BRIDGE(obj);
>       PREPPCIState *s = RAVEN_PCI_HOST_BRIDGE(obj);
>       MemoryRegion *address_space_mem = get_system_memory();
> -    DeviceState *pci_dev;
>   
>       memory_region_init(&s->pci_io, obj, "pci-io", 0x3f800000);
>       memory_region_init_io(&s->pci_io_non_contiguous, obj, &raven_io_ops, s,
> @@ -314,12 +304,6 @@ static void raven_pcihost_initfn(Object *obj)
>       pci_setup_iommu(&s->pci_bus, &raven_iommu_ops, s);
>   
>       h->bus = &s->pci_bus;
> -
> -    object_initialize(&s->pci_dev, sizeof(s->pci_dev), TYPE_RAVEN_PCI_DEVICE);
> -    pci_dev = DEVICE(&s->pci_dev);
> -    object_property_set_int(OBJECT(&s->pci_dev), "addr", PCI_DEVFN(0, 0),
> -                            NULL);
> -    qdev_prop_set_bit(pci_dev, "multifunction", false);
>   }
>   
>   static void raven_realize(PCIDevice *d, Error **errp)
> @@ -329,16 +313,6 @@ static void raven_realize(PCIDevice *d, Error **errp)
>       d->config[PCI_CAPABILITY_LIST] = 0x00;
>   }
>   
> -static const VMStateDescription vmstate_raven = {
> -    .name = "raven",
> -    .version_id = 0,
> -    .minimum_version_id = 0,
> -    .fields = (const VMStateField[]) {
> -        VMSTATE_PCI_DEVICE(dev, RavenPCIState),
> -        VMSTATE_END_OF_LIST()
> -    },
> -};
> -
>   static void raven_class_init(ObjectClass *klass, const void *data)
>   {
>       PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
> @@ -350,7 +324,6 @@ static void raven_class_init(ObjectClass *klass, const void *data)
>       k->revision = 0x00;
>       k->class_id = PCI_CLASS_BRIDGE_HOST;
>       dc->desc = "PReP Host Bridge - Motorola Raven";
> -    dc->vmsd = &vmstate_raven;
>       /*
>        * Reason: PCI-facing part of the host bridge, not usable without
>        * the host-facing part, which can't be device_add'ed, yet.
> @@ -361,7 +334,6 @@ static void raven_class_init(ObjectClass *klass, const void *data)
>   static const TypeInfo raven_info = {
>       .name = TYPE_RAVEN_PCI_DEVICE,
>       .parent = TYPE_PCI_DEVICE,
> -    .instance_size = sizeof(RavenPCIState),
>       .class_init = raven_class_init,
>       .interfaces = (const InterfaceInfo[]) {
>           { INTERFACE_CONVENTIONAL_PCI_DEVICE },

I'd rather this patch split in 2: remove vmstate, mentioning this breaks
migration, then use pci_create_simple().

Re: [PATCH v4 01/16] hw/pci-host/raven: Simplify PCI facing part

[BALATON Zoltan]

[-- Attachment #1: Type: text/plain, Size: 4611 bytes --]

On Mon, 20 Oct 2025, Philippe Mathieu-Daudé wrote:
> On 18/10/25 16:04, BALATON Zoltan wrote:
>> The raven PCI device does not need a state struct as it has no data to
>> store there any more, so we can remove that to simplify code.
>> 
>> Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
>> ---
>>   hw/pci-host/raven.c | 30 +-----------------------------
>>   1 file changed, 1 insertion(+), 29 deletions(-)
>> 
>> diff --git a/hw/pci-host/raven.c b/hw/pci-host/raven.c
>> index f8c0be5d21..172f01694c 100644
>> --- a/hw/pci-host/raven.c
>> +++ b/hw/pci-host/raven.c
>> @@ -31,7 +31,6 @@
>>   #include "hw/pci/pci_bus.h"
>>   #include "hw/pci/pci_host.h"
>>   #include "hw/qdev-properties.h"
>> -#include "migration/vmstate.h"
>>   #include "hw/intc/i8259.h"
>>   #include "hw/irq.h"
>>   #include "hw/or-irq.h"
>> @@ -40,12 +39,6 @@
>>   #define TYPE_RAVEN_PCI_DEVICE "raven"
>>   #define TYPE_RAVEN_PCI_HOST_BRIDGE "raven-pcihost"
>>   -OBJECT_DECLARE_SIMPLE_TYPE(RavenPCIState, RAVEN_PCI_DEVICE)
>> -
>> -struct RavenPCIState {
>> -    PCIDevice dev;
>> -};
>> -
>>   typedef struct PRePPCIState PREPPCIState;
>>   DECLARE_INSTANCE_CHECKER(PREPPCIState, RAVEN_PCI_HOST_BRIDGE,
>>                            TYPE_RAVEN_PCI_HOST_BRIDGE)
>> @@ -65,7 +58,6 @@ struct PRePPCIState {
>>       MemoryRegion bm_ram_alias;
>>       MemoryRegion bm_pci_memory_alias;
>>       AddressSpace bm_as;
>> -    RavenPCIState pci_dev;
>>         int contiguous_map;
>>   };
>> @@ -268,8 +260,7 @@ static void raven_pcihost_realizefn(DeviceState *d, 
>> Error **errp)
>>                             "pci-intack", 1);
>>       memory_region_add_subregion(address_space_mem, 0xbffffff0, 
>> &s->pci_intack);
>>   -    /* TODO Remove once realize propagates to child devices. */
>> -    qdev_realize(DEVICE(&s->pci_dev), BUS(&s->pci_bus), errp);
>> +    pci_create_simple(&s->pci_bus, PCI_DEVFN(0, 0), 
>> TYPE_RAVEN_PCI_DEVICE);
>>   }
>>     static void raven_pcihost_initfn(Object *obj)
>> @@ -277,7 +268,6 @@ static void raven_pcihost_initfn(Object *obj)
>>       PCIHostState *h = PCI_HOST_BRIDGE(obj);
>>       PREPPCIState *s = RAVEN_PCI_HOST_BRIDGE(obj);
>>       MemoryRegion *address_space_mem = get_system_memory();
>> -    DeviceState *pci_dev;
>>         memory_region_init(&s->pci_io, obj, "pci-io", 0x3f800000);
>>       memory_region_init_io(&s->pci_io_non_contiguous, obj, &raven_io_ops, 
>> s,
>> @@ -314,12 +304,6 @@ static void raven_pcihost_initfn(Object *obj)
>>       pci_setup_iommu(&s->pci_bus, &raven_iommu_ops, s);
>>         h->bus = &s->pci_bus;
>> -
>> -    object_initialize(&s->pci_dev, sizeof(s->pci_dev), 
>> TYPE_RAVEN_PCI_DEVICE);
>> -    pci_dev = DEVICE(&s->pci_dev);
>> -    object_property_set_int(OBJECT(&s->pci_dev), "addr", PCI_DEVFN(0, 0),
>> -                            NULL);
>> -    qdev_prop_set_bit(pci_dev, "multifunction", false);
>>   }
>>     static void raven_realize(PCIDevice *d, Error **errp)
>> @@ -329,16 +313,6 @@ static void raven_realize(PCIDevice *d, Error **errp)
>>       d->config[PCI_CAPABILITY_LIST] = 0x00;
>>   }
>>   -static const VMStateDescription vmstate_raven = {
>> -    .name = "raven",
>> -    .version_id = 0,
>> -    .minimum_version_id = 0,
>> -    .fields = (const VMStateField[]) {
>> -        VMSTATE_PCI_DEVICE(dev, RavenPCIState),
>> -        VMSTATE_END_OF_LIST()
>> -    },
>> -};
>> -
>>   static void raven_class_init(ObjectClass *klass, const void *data)
>>   {
>>       PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
>> @@ -350,7 +324,6 @@ static void raven_class_init(ObjectClass *klass, const 
>> void *data)
>>       k->revision = 0x00;
>>       k->class_id = PCI_CLASS_BRIDGE_HOST;
>>       dc->desc = "PReP Host Bridge - Motorola Raven";
>> -    dc->vmsd = &vmstate_raven;
>>       /*
>>        * Reason: PCI-facing part of the host bridge, not usable without
>>        * the host-facing part, which can't be device_add'ed, yet.
>> @@ -361,7 +334,6 @@ static void raven_class_init(ObjectClass *klass, const 
>> void *data)
>>   static const TypeInfo raven_info = {
>>       .name = TYPE_RAVEN_PCI_DEVICE,
>>       .parent = TYPE_PCI_DEVICE,
>> -    .instance_size = sizeof(RavenPCIState),
>>       .class_init = raven_class_init,
>>       .interfaces = (const InterfaceInfo[]) {
>>           { INTERFACE_CONVENTIONAL_PCI_DEVICE },
>
> I'd rather this patch split in 2: remove vmstate, mentioning this breaks
> migration, then use pci_create_simple().

I can do the other way around: first convert to pci_create_simple which 
leaves RavenPCIState pci_dev unused that then can be removed in another 
patch.

Regards,
BALATON Zoltan

Re: [PATCH v4 01/16] hw/pci-host/raven: Simplify PCI facing part

[Philippe Mathieu-Daudé]

On 20/10/25 22:54, BALATON Zoltan wrote:
> On Mon, 20 Oct 2025, Philippe Mathieu-Daudé wrote:
>> On 18/10/25 16:04, BALATON Zoltan wrote:
>>> The raven PCI device does not need a state struct as it has no data to
>>> store there any more, so we can remove that to simplify code.
>>>
>>> Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
>>> ---
>>>   hw/pci-host/raven.c | 30 +-----------------------------
>>>   1 file changed, 1 insertion(+), 29 deletions(-)


>> I'd rather this patch split in 2: remove vmstate, mentioning this breaks
>> migration, then use pci_create_simple().
> 
> I can do the other way around: first convert to pci_create_simple which 
> leaves RavenPCIState pci_dev unused that then can be removed in another 
> patch.
LGTM, thanks!

[PATCH v4 02/16] hw/pci-host/raven: Simplify host bridge type declaration

[BALATON Zoltan]

Use OBJECT_DECLARE_SIMPLE_TYPE macro instead of open coding it and
change state struct name to match the previous typedef.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
---
 hw/pci-host/raven.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/hw/pci-host/raven.c b/hw/pci-host/raven.c
index 172f01694c..878c915de5 100644
--- a/hw/pci-host/raven.c
+++ b/hw/pci-host/raven.c
@@ -39,11 +39,9 @@
 #define TYPE_RAVEN_PCI_DEVICE "raven"
 #define TYPE_RAVEN_PCI_HOST_BRIDGE "raven-pcihost"
 
-typedef struct PRePPCIState PREPPCIState;
-DECLARE_INSTANCE_CHECKER(PREPPCIState, RAVEN_PCI_HOST_BRIDGE,
-                         TYPE_RAVEN_PCI_HOST_BRIDGE)
+OBJECT_DECLARE_SIMPLE_TYPE(PREPPCIState, RAVEN_PCI_HOST_BRIDGE)
 
-struct PRePPCIState {
+struct PREPPCIState {
     PCIHostState parent_obj;
 
     OrIRQState *or_irq;
-- 
2.41.3

[PATCH v4 03/16] hw/pci-host/raven: Use DEFINE_TYPES macro

[BALATON Zoltan]

Convert to using DEFINE_TYPES macro and move raven_pcihost_class_init
so methods of each object are grouped together.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
---
 hw/pci-host/raven.c | 57 +++++++++++++++++++++------------------------
 1 file changed, 26 insertions(+), 31 deletions(-)

diff --git a/hw/pci-host/raven.c b/hw/pci-host/raven.c
index 878c915de5..e0f98afebf 100644
--- a/hw/pci-host/raven.c
+++ b/hw/pci-host/raven.c
@@ -304,6 +304,15 @@ static void raven_pcihost_initfn(Object *obj)
     h->bus = &s->pci_bus;
 }
 
+static void raven_pcihost_class_init(ObjectClass *klass, const void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
+    dc->realize = raven_pcihost_realizefn;
+    dc->fw_name = "pci";
+}
+
 static void raven_realize(PCIDevice *d, Error **errp)
 {
     d->config[PCI_CACHE_LINE_SIZE] = 0x08;
@@ -329,37 +338,23 @@ static void raven_class_init(ObjectClass *klass, const void *data)
     dc->user_creatable = false;
 }
 
-static const TypeInfo raven_info = {
-    .name = TYPE_RAVEN_PCI_DEVICE,
-    .parent = TYPE_PCI_DEVICE,
-    .class_init = raven_class_init,
-    .interfaces = (const InterfaceInfo[]) {
-        { INTERFACE_CONVENTIONAL_PCI_DEVICE },
-        { },
+static const TypeInfo raven_types[] = {
+    {
+        .name = TYPE_RAVEN_PCI_HOST_BRIDGE,
+        .parent = TYPE_PCI_HOST_BRIDGE,
+        .instance_size = sizeof(PREPPCIState),
+        .instance_init = raven_pcihost_initfn,
+        .class_init = raven_pcihost_class_init,
+    },
+    {
+        .name = TYPE_RAVEN_PCI_DEVICE,
+        .parent = TYPE_PCI_DEVICE,
+        .class_init = raven_class_init,
+        .interfaces = (const InterfaceInfo[]) {
+            { INTERFACE_CONVENTIONAL_PCI_DEVICE },
+            { },
+        },
     },
 };
 
-static void raven_pcihost_class_init(ObjectClass *klass, const void *data)
-{
-    DeviceClass *dc = DEVICE_CLASS(klass);
-
-    set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
-    dc->realize = raven_pcihost_realizefn;
-    dc->fw_name = "pci";
-}
-
-static const TypeInfo raven_pcihost_info = {
-    .name = TYPE_RAVEN_PCI_HOST_BRIDGE,
-    .parent = TYPE_PCI_HOST_BRIDGE,
-    .instance_size = sizeof(PREPPCIState),
-    .instance_init = raven_pcihost_initfn,
-    .class_init = raven_pcihost_class_init,
-};
-
-static void raven_register_types(void)
-{
-    type_register_static(&raven_pcihost_info);
-    type_register_static(&raven_info);
-}
-
-type_init(raven_register_types)
+DEFINE_TYPES(raven_types)
-- 
2.41.3

[PATCH v4 04/16] hw/pci-host/raven: Simplify PCI bus creation

[BALATON Zoltan]

Instead of doing it manually use pci_register_root_bus() to create and
register the PCI bus. Also drop pci_bus from PREPPCIState and use the
existing bus field in the parent PCIHostState.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
---
 hw/pci-host/raven.c | 18 +++++++-----------
 1 file changed, 7 insertions(+), 11 deletions(-)

diff --git a/hw/pci-host/raven.c b/hw/pci-host/raven.c
index e0f98afebf..51427553b2 100644
--- a/hw/pci-host/raven.c
+++ b/hw/pci-host/raven.c
@@ -46,7 +46,6 @@ struct PREPPCIState {
 
     OrIRQState *or_irq;
     qemu_irq pci_irqs[PCI_NUM_PINS];
-    PCIBus pci_bus;
     AddressSpace pci_io_as;
     MemoryRegion pci_io;
     MemoryRegion pci_io_non_contiguous;
@@ -239,8 +238,9 @@ static void raven_pcihost_realizefn(DeviceState *d, Error **errp)
 
     qdev_init_gpio_in(d, raven_change_gpio, 1);
 
-    pci_bus_irqs(&s->pci_bus, raven_set_irq, s, PCI_NUM_PINS);
-    pci_bus_map_irqs(&s->pci_bus, raven_map_irq);
+    h->bus = pci_register_root_bus(d, NULL, raven_set_irq, raven_map_irq,
+                                   s, &s->pci_memory, &s->pci_io, 0, 4,
+                                   TYPE_PCI_BUS);
 
     memory_region_init_io(&h->conf_mem, OBJECT(h), &pci_host_conf_le_ops, s,
                           "pci-conf-idx", 4);
@@ -258,12 +258,14 @@ static void raven_pcihost_realizefn(DeviceState *d, Error **errp)
                           "pci-intack", 1);
     memory_region_add_subregion(address_space_mem, 0xbffffff0, &s->pci_intack);
 
-    pci_create_simple(&s->pci_bus, PCI_DEVFN(0, 0), TYPE_RAVEN_PCI_DEVICE);
+    pci_create_simple(h->bus, PCI_DEVFN(0, 0), TYPE_RAVEN_PCI_DEVICE);
+
+    address_space_init(&s->bm_as, &s->bm, "raven-bm");
+    pci_setup_iommu(h->bus, &raven_iommu_ops, s);
 }
 
 static void raven_pcihost_initfn(Object *obj)
 {
-    PCIHostState *h = PCI_HOST_BRIDGE(obj);
     PREPPCIState *s = RAVEN_PCI_HOST_BRIDGE(obj);
     MemoryRegion *address_space_mem = get_system_memory();
 
@@ -286,8 +288,6 @@ static void raven_pcihost_initfn(Object *obj)
     memory_region_add_subregion_overlap(address_space_mem, PCI_IO_BASE_ADDR,
                                         &s->pci_io_non_contiguous, 1);
     memory_region_add_subregion(address_space_mem, 0xc0000000, &s->pci_memory);
-    pci_root_bus_init(&s->pci_bus, sizeof(s->pci_bus), DEVICE(obj), NULL,
-                      &s->pci_memory, &s->pci_io, 0, TYPE_PCI_BUS);
 
     /* Bus master address space */
     memory_region_init(&s->bm, obj, "bm-raven", 4 * GiB);
@@ -298,10 +298,6 @@ static void raven_pcihost_initfn(Object *obj)
                              get_system_memory(), 0, 0x80000000);
     memory_region_add_subregion(&s->bm, 0         , &s->bm_pci_memory_alias);
     memory_region_add_subregion(&s->bm, 0x80000000, &s->bm_ram_alias);
-    address_space_init(&s->bm_as, &s->bm, "raven-bm");
-    pci_setup_iommu(&s->pci_bus, &raven_iommu_ops, s);
-
-    h->bus = &s->pci_bus;
 }
 
 static void raven_pcihost_class_init(ObjectClass *klass, const void *data)
-- 
2.41.3

[PATCH v4 05/16] hw/pci-host/raven: Simplify PCI interrupt routing

[BALATON Zoltan]

No need to use an or-irq to map interrupt lines to a single IRQ as the
PCI code can handle this internally so simplify by dropping the or-irq
similar to how ppc440_pcix.c does it.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
---
 hw/pci-host/raven.c | 39 +++++++++++++++------------------------
 hw/ppc/prep.c       |  5 ++++-
 2 files changed, 19 insertions(+), 25 deletions(-)

diff --git a/hw/pci-host/raven.c b/hw/pci-host/raven.c
index 51427553b2..a400a22df3 100644
--- a/hw/pci-host/raven.c
+++ b/hw/pci-host/raven.c
@@ -30,11 +30,8 @@
 #include "hw/pci/pci_device.h"
 #include "hw/pci/pci_bus.h"
 #include "hw/pci/pci_host.h"
-#include "hw/qdev-properties.h"
 #include "hw/intc/i8259.h"
 #include "hw/irq.h"
-#include "hw/or-irq.h"
-#include "qom/object.h"
 
 #define TYPE_RAVEN_PCI_DEVICE "raven"
 #define TYPE_RAVEN_PCI_HOST_BRIDGE "raven-pcihost"
@@ -44,8 +41,7 @@ OBJECT_DECLARE_SIMPLE_TYPE(PREPPCIState, RAVEN_PCI_HOST_BRIDGE)
 struct PREPPCIState {
     PCIHostState parent_obj;
 
-    OrIRQState *or_irq;
-    qemu_irq pci_irqs[PCI_NUM_PINS];
+    qemu_irq irq;
     AddressSpace pci_io_as;
     MemoryRegion pci_io;
     MemoryRegion pci_io_non_contiguous;
@@ -183,16 +179,25 @@ static const MemoryRegionOps raven_io_ops = {
     .valid.unaligned = true,
 };
 
+/*
+ * All four IRQ[ABCD] pins from all slots are tied to a single board
+ * IRQ, so our mapping function here maps everything to IRQ 0.
+ * The code in pci_change_irq_level() tracks the number of times
+ * the mapped IRQ is asserted and deasserted, so if multiple devices
+ * assert an IRQ at the same time the behaviour is correct.
+ *
+ * This may need further refactoring for boards that use multiple IRQ lines.
+ */
 static int raven_map_irq(PCIDevice *pci_dev, int irq_num)
 {
-    return (irq_num + (pci_dev->devfn >> 3)) & 1;
+    return 0;
 }
 
 static void raven_set_irq(void *opaque, int irq_num, int level)
 {
-    PREPPCIState *s = opaque;
+    qemu_irq *irq = opaque;
 
-    qemu_set_irq(s->pci_irqs[irq_num], level);
+    qemu_set_irq(*irq, level);
 }
 
 static AddressSpace *raven_pcihost_set_iommu(PCIBus *bus, void *opaque,
@@ -220,26 +225,12 @@ static void raven_pcihost_realizefn(DeviceState *d, Error **errp)
     PCIHostState *h = PCI_HOST_BRIDGE(dev);
     PREPPCIState *s = RAVEN_PCI_HOST_BRIDGE(dev);
     MemoryRegion *address_space_mem = get_system_memory();
-    int i;
-
-    /*
-     * According to PReP specification section 6.1.6 "System Interrupt
-     * Assignments", all PCI interrupts are routed via IRQ 15
-     */
-    s->or_irq = OR_IRQ(object_new(TYPE_OR_IRQ));
-    object_property_set_int(OBJECT(s->or_irq), "num-lines", PCI_NUM_PINS,
-                            &error_fatal);
-    qdev_realize(DEVICE(s->or_irq), NULL, &error_fatal);
-    sysbus_init_irq(dev, &s->or_irq->out_irq);
-
-    for (i = 0; i < PCI_NUM_PINS; i++) {
-        s->pci_irqs[i] = qdev_get_gpio_in(DEVICE(s->or_irq), i);
-    }
 
     qdev_init_gpio_in(d, raven_change_gpio, 1);
 
+    sysbus_init_irq(dev, &s->irq);
     h->bus = pci_register_root_bus(d, NULL, raven_set_irq, raven_map_irq,
-                                   s, &s->pci_memory, &s->pci_io, 0, 4,
+                                   &s->irq, &s->pci_memory, &s->pci_io, 0, 1,
                                    TYPE_PCI_BUS);
 
     memory_region_init_io(&h->conf_mem, OBJECT(h), &pci_host_conf_le_ops, s,
diff --git a/hw/ppc/prep.c b/hw/ppc/prep.c
index 982e40e53e..d3365414d2 100644
--- a/hw/ppc/prep.c
+++ b/hw/ppc/prep.c
@@ -304,7 +304,10 @@ static void ibm_40p_init(MachineState *machine)
     qdev_realize_and_unref(i82378_dev, BUS(pci_bus), &error_fatal);
     qdev_connect_gpio_out(i82378_dev, 0,
                           qdev_get_gpio_in(DEVICE(cpu), PPC6xx_INPUT_INT));
-
+    /*
+     * According to PReP specification section 6.1.6 "System Interrupt
+     * Assignments", all PCI interrupts are routed via IRQ 15
+     */
     sysbus_connect_irq(pcihost, 0, qdev_get_gpio_in(i82378_dev, 15));
     isa_bus = ISA_BUS(qdev_get_child_bus(i82378_dev, "isa.0"));
 
-- 
2.41.3

[PATCH v4 06/16] hw/pci-host/raven: Simplify direct config access address decoding

[BALATON Zoltan]

Use ctz instead of an open coded version and rename function to better
show what it does.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
---
 hw/pci-host/raven.c | 15 ++++-----------
 1 file changed, 4 insertions(+), 11 deletions(-)

diff --git a/hw/pci-host/raven.c b/hw/pci-host/raven.c
index a400a22df3..66dab28a29 100644
--- a/hw/pci-host/raven.c
+++ b/hw/pci-host/raven.c
@@ -57,16 +57,9 @@ struct PREPPCIState {
 
 #define PCI_IO_BASE_ADDR    0x80000000  /* Physical address on main bus */
 
-static inline uint32_t raven_pci_io_config(hwaddr addr)
+static inline uint32_t raven_idsel_to_addr(hwaddr addr)
 {
-    int i;
-
-    for (i = 0; i < 11; i++) {
-        if ((addr & (1 << (11 + i))) != 0) {
-            break;
-        }
-    }
-    return (addr & 0x7ff) |  (i << 11);
+    return (ctz16(addr >> 11) << 11) | (addr & 0x7ff);
 }
 
 static void raven_pci_io_write(void *opaque, hwaddr addr,
@@ -74,7 +67,7 @@ static void raven_pci_io_write(void *opaque, hwaddr addr,
 {
     PREPPCIState *s = opaque;
     PCIHostState *phb = PCI_HOST_BRIDGE(s);
-    pci_data_write(phb->bus, raven_pci_io_config(addr), val, size);
+    pci_data_write(phb->bus, raven_idsel_to_addr(addr), val, size);
 }
 
 static uint64_t raven_pci_io_read(void *opaque, hwaddr addr,
@@ -82,7 +75,7 @@ static uint64_t raven_pci_io_read(void *opaque, hwaddr addr,
 {
     PREPPCIState *s = opaque;
     PCIHostState *phb = PCI_HOST_BRIDGE(s);
-    return pci_data_read(phb->bus, raven_pci_io_config(addr), size);
+    return pci_data_read(phb->bus, raven_idsel_to_addr(addr), size);
 }
 
 static const MemoryRegionOps raven_pci_io_ops = {
-- 
2.41.3

Re: [PATCH v4 06/16] hw/pci-host/raven: Simplify direct config access address decoding

[Philippe Mathieu-Daudé]

On 18/10/25 16:04, BALATON Zoltan wrote:
> Use ctz instead of an open coded version and rename function to better
> show what it does.
> 
> Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
> Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
> ---
>   hw/pci-host/raven.c | 15 ++++-----------
>   1 file changed, 4 insertions(+), 11 deletions(-)

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>

[PATCH v4 07/16] hw/pci-host/raven: Rename direct config access ops

[BALATON Zoltan]

Rename memory io ops implementing PCI configuration direct access to
mmcfg which describes better what these are for.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
---
 hw/pci-host/raven.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/hw/pci-host/raven.c b/hw/pci-host/raven.c
index 66dab28a29..d7a0bde382 100644
--- a/hw/pci-host/raven.c
+++ b/hw/pci-host/raven.c
@@ -62,25 +62,24 @@ static inline uint32_t raven_idsel_to_addr(hwaddr addr)
     return (ctz16(addr >> 11) << 11) | (addr & 0x7ff);
 }
 
-static void raven_pci_io_write(void *opaque, hwaddr addr,
-                               uint64_t val, unsigned int size)
+static void raven_mmcfg_write(void *opaque, hwaddr addr, uint64_t val,
+                              unsigned int size)
 {
     PREPPCIState *s = opaque;
     PCIHostState *phb = PCI_HOST_BRIDGE(s);
     pci_data_write(phb->bus, raven_idsel_to_addr(addr), val, size);
 }
 
-static uint64_t raven_pci_io_read(void *opaque, hwaddr addr,
-                                  unsigned int size)
+static uint64_t raven_mmcfg_read(void *opaque, hwaddr addr, unsigned int size)
 {
     PREPPCIState *s = opaque;
     PCIHostState *phb = PCI_HOST_BRIDGE(s);
     return pci_data_read(phb->bus, raven_idsel_to_addr(addr), size);
 }
 
-static const MemoryRegionOps raven_pci_io_ops = {
-    .read = raven_pci_io_read,
-    .write = raven_pci_io_write,
+static const MemoryRegionOps raven_mmcfg_ops = {
+    .read = raven_mmcfg_read,
+    .write = raven_mmcfg_write,
     .endianness = DEVICE_LITTLE_ENDIAN,
 };
 
@@ -234,8 +233,8 @@ static void raven_pcihost_realizefn(DeviceState *d, Error **errp)
                           "pci-conf-data", 4);
     memory_region_add_subregion(&s->pci_io, 0xcfc, &h->data_mem);
 
-    memory_region_init_io(&h->mmcfg, OBJECT(s), &raven_pci_io_ops, s,
-                          "pciio", 0x00400000);
+    memory_region_init_io(&h->mmcfg, OBJECT(s), &raven_mmcfg_ops, s,
+                          "pci-mmcfg", 0x00400000);
     memory_region_add_subregion(address_space_mem, 0x80800000, &h->mmcfg);
 
     memory_region_init_io(&s->pci_intack, OBJECT(s), &raven_intack_ops, s,
-- 
2.41.3

Re: [PATCH v4 07/16] hw/pci-host/raven: Rename direct config access ops

[Philippe Mathieu-Daudé]

On 18/10/25 16:04, BALATON Zoltan wrote:
> Rename memory io ops implementing PCI configuration direct access to
> mmcfg which describes better what these are for.
> 
> Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
> Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
> ---
>   hw/pci-host/raven.c | 17 ++++++++---------
>   1 file changed, 8 insertions(+), 9 deletions(-)

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>

[PATCH v4 08/16] hw/pci-host/raven: Use correct parameter in direct access ops

[BALATON Zoltan]

Instead of passing unneeded enclosing objects to the config direct
access ops that only need the bus we can pass that directly thus
simplifying the functions.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/pci-host/raven.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/hw/pci-host/raven.c b/hw/pci-host/raven.c
index d7a0bde382..2057a1869f 100644
--- a/hw/pci-host/raven.c
+++ b/hw/pci-host/raven.c
@@ -65,16 +65,16 @@ static inline uint32_t raven_idsel_to_addr(hwaddr addr)
 static void raven_mmcfg_write(void *opaque, hwaddr addr, uint64_t val,
                               unsigned int size)
 {
-    PREPPCIState *s = opaque;
-    PCIHostState *phb = PCI_HOST_BRIDGE(s);
-    pci_data_write(phb->bus, raven_idsel_to_addr(addr), val, size);
+    PCIBus *hbus = opaque;
+
+    pci_data_write(hbus, raven_idsel_to_addr(addr), val, size);
 }
 
 static uint64_t raven_mmcfg_read(void *opaque, hwaddr addr, unsigned int size)
 {
-    PREPPCIState *s = opaque;
-    PCIHostState *phb = PCI_HOST_BRIDGE(s);
-    return pci_data_read(phb->bus, raven_idsel_to_addr(addr), size);
+    PCIBus *hbus = opaque;
+
+    return pci_data_read(hbus, raven_idsel_to_addr(addr), size);
 }
 
 static const MemoryRegionOps raven_mmcfg_ops = {
@@ -233,7 +233,7 @@ static void raven_pcihost_realizefn(DeviceState *d, Error **errp)
                           "pci-conf-data", 4);
     memory_region_add_subregion(&s->pci_io, 0xcfc, &h->data_mem);
 
-    memory_region_init_io(&h->mmcfg, OBJECT(s), &raven_mmcfg_ops, s,
+    memory_region_init_io(&h->mmcfg, OBJECT(h), &raven_mmcfg_ops, h->bus,
                           "pci-mmcfg", 0x00400000);
     memory_region_add_subregion(address_space_mem, 0x80800000, &h->mmcfg);
 
-- 
2.41.3

[PATCH v4 09/16] hw/pci-host/raven: Do not use parent object for mmcfg region

[BALATON Zoltan]

The mmcfg field in PCIHostState is only used by raven for the PCI
config direct access but is not actually needed as the memory region
lifetime can be managed by the object given during init so use that
and remove the unused field from PCIHostState.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
---
 hw/pci-host/raven.c       | 7 ++++---
 include/hw/pci/pci_host.h | 1 -
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/hw/pci-host/raven.c b/hw/pci-host/raven.c
index 2057a1869f..23020fd09f 100644
--- a/hw/pci-host/raven.c
+++ b/hw/pci-host/raven.c
@@ -216,7 +216,7 @@ static void raven_pcihost_realizefn(DeviceState *d, Error **errp)
     SysBusDevice *dev = SYS_BUS_DEVICE(d);
     PCIHostState *h = PCI_HOST_BRIDGE(dev);
     PREPPCIState *s = RAVEN_PCI_HOST_BRIDGE(dev);
-    MemoryRegion *address_space_mem = get_system_memory();
+    MemoryRegion *mr, *address_space_mem = get_system_memory();
 
     qdev_init_gpio_in(d, raven_change_gpio, 1);
 
@@ -233,9 +233,10 @@ static void raven_pcihost_realizefn(DeviceState *d, Error **errp)
                           "pci-conf-data", 4);
     memory_region_add_subregion(&s->pci_io, 0xcfc, &h->data_mem);
 
-    memory_region_init_io(&h->mmcfg, OBJECT(h), &raven_mmcfg_ops, h->bus,
+    mr = g_new0(MemoryRegion, 1);
+    memory_region_init_io(mr, OBJECT(h), &raven_mmcfg_ops, h->bus,
                           "pci-mmcfg", 0x00400000);
-    memory_region_add_subregion(address_space_mem, 0x80800000, &h->mmcfg);
+    memory_region_add_subregion(address_space_mem, 0x80800000, mr);
 
     memory_region_init_io(&s->pci_intack, OBJECT(s), &raven_intack_ops, s,
                           "pci-intack", 1);
diff --git a/include/hw/pci/pci_host.h b/include/hw/pci/pci_host.h
index 954dd446fa..a13f879872 100644
--- a/include/hw/pci/pci_host.h
+++ b/include/hw/pci/pci_host.h
@@ -41,7 +41,6 @@ struct PCIHostState {
 
     MemoryRegion conf_mem;
     MemoryRegion data_mem;
-    MemoryRegion mmcfg;
     uint32_t config_reg;
     bool mig_enabled;
     PCIBus *bus;
-- 
2.41.3

[PATCH v4 10/16] hw/pci-host/raven: Fix PCI config direct access region

[BALATON Zoltan]

The PCI configuration direct access region occupies 8 MiB at offset
0x800000 in PCI IO space so model that accordingly.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
---
 hw/pci-host/raven.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/pci-host/raven.c b/hw/pci-host/raven.c
index 23020fd09f..bb0be40eb4 100644
--- a/hw/pci-host/raven.c
+++ b/hw/pci-host/raven.c
@@ -235,8 +235,8 @@ static void raven_pcihost_realizefn(DeviceState *d, Error **errp)
 
     mr = g_new0(MemoryRegion, 1);
     memory_region_init_io(mr, OBJECT(h), &raven_mmcfg_ops, h->bus,
-                          "pci-mmcfg", 0x00400000);
-    memory_region_add_subregion(address_space_mem, 0x80800000, mr);
+                          "pci-mmcfg", 8 * MiB);
+    memory_region_add_subregion(&s->pci_io, 0x800000, mr);
 
     memory_region_init_io(&s->pci_intack, OBJECT(s), &raven_intack_ops, s,
                           "pci-intack", 1);
-- 
2.41.3

[PATCH v4 11/16] hw/pci-host/raven: Simpify discontiguous IO access

[BALATON Zoltan]

PREP allows remapping of the 64k ISA IO addresses from the normal
contiguous IO space into a discontiguous 8MB region and can switch
between the two modes. We can implement this in a simpler way than is
done currently using an io region that forwards access to the
contiguous pci_io region and enabling/disabling the discontiguous
region as needed.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
---
 hw/pci-host/raven.c | 88 ++++++++++++---------------------------------
 1 file changed, 22 insertions(+), 66 deletions(-)

diff --git a/hw/pci-host/raven.c b/hw/pci-host/raven.c
index bb0be40eb4..bf4f4b7f71 100644
--- a/hw/pci-host/raven.c
+++ b/hw/pci-host/raven.c
@@ -42,17 +42,14 @@ struct PREPPCIState {
     PCIHostState parent_obj;
 
     qemu_irq irq;
-    AddressSpace pci_io_as;
     MemoryRegion pci_io;
-    MemoryRegion pci_io_non_contiguous;
+    MemoryRegion pci_discontiguous_io;
     MemoryRegion pci_memory;
     MemoryRegion pci_intack;
     MemoryRegion bm;
     MemoryRegion bm_ram_alias;
     MemoryRegion bm_pci_memory_alias;
     AddressSpace bm_as;
-
-    int contiguous_map;
 };
 
 #define PCI_IO_BASE_ADDR    0x80000000  /* Physical address on main bus */
@@ -103,63 +100,28 @@ static const MemoryRegionOps raven_intack_ops = {
     },
 };
 
-static inline hwaddr raven_io_address(PREPPCIState *s,
-                                      hwaddr addr)
+/* Convert 8 MB non-contiguous address to 64k ISA IO address */
+static inline hwaddr raven_io_addr(hwaddr addr)
 {
-    if (s->contiguous_map == 0) {
-        /* 64 KB contiguous space for IOs */
-        addr &= 0xFFFF;
-    } else {
-        /* 8 MB non-contiguous space for IOs */
-        addr = (addr & 0x1F) | ((addr & 0x007FFF000) >> 7);
-    }
-
-    /* FIXME: handle endianness switch */
-
-    return addr;
+    return ((addr & 0x007FFF000) >> 7) | (addr & 0x1F);
 }
 
-static uint64_t raven_io_read(void *opaque, hwaddr addr,
-                              unsigned int size)
+static uint64_t raven_io_read(void *opaque, hwaddr addr, unsigned int size)
 {
-    PREPPCIState *s = opaque;
-    uint8_t buf[4];
-
-    addr = raven_io_address(s, addr);
-    address_space_read(&s->pci_io_as, addr + PCI_IO_BASE_ADDR,
-                       MEMTXATTRS_UNSPECIFIED, buf, size);
-
-    if (size == 1) {
-        return buf[0];
-    } else if (size == 2) {
-        return lduw_le_p(buf);
-    } else if (size == 4) {
-        return ldl_le_p(buf);
-    } else {
-        g_assert_not_reached();
-    }
+    uint64_t val = 0xffffffffULL;
+
+    memory_region_dispatch_read(opaque, raven_io_addr(addr), &val,
+                                size_memop(size) | MO_LE,
+                                MEMTXATTRS_UNSPECIFIED);
+    return val;
 }
 
-static void raven_io_write(void *opaque, hwaddr addr,
-                           uint64_t val, unsigned int size)
+static void raven_io_write(void *opaque, hwaddr addr, uint64_t val,
+                           unsigned int size)
 {
-    PREPPCIState *s = opaque;
-    uint8_t buf[4];
-
-    addr = raven_io_address(s, addr);
-
-    if (size == 1) {
-        buf[0] = val;
-    } else if (size == 2) {
-        stw_le_p(buf, val);
-    } else if (size == 4) {
-        stl_le_p(buf, val);
-    } else {
-        g_assert_not_reached();
-    }
-
-    address_space_write(&s->pci_io_as, addr + PCI_IO_BASE_ADDR,
-                        MEMTXATTRS_UNSPECIFIED, buf, size);
+    memory_region_dispatch_write(opaque, raven_io_addr(addr), val,
+                                 size_memop(size) | MO_LE,
+                                 MEMTXATTRS_UNSPECIFIED);
 }
 
 static const MemoryRegionOps raven_io_ops = {
@@ -208,7 +170,7 @@ static void raven_change_gpio(void *opaque, int n, int level)
 {
     PREPPCIState *s = opaque;
 
-    s->contiguous_map = level;
+    memory_region_set_enabled(&s->pci_discontiguous_io, !!level);
 }
 
 static void raven_pcihost_realizefn(DeviceState *d, Error **errp)
@@ -254,23 +216,17 @@ static void raven_pcihost_initfn(Object *obj)
     MemoryRegion *address_space_mem = get_system_memory();
 
     memory_region_init(&s->pci_io, obj, "pci-io", 0x3f800000);
-    memory_region_init_io(&s->pci_io_non_contiguous, obj, &raven_io_ops, s,
-                          "pci-io-non-contiguous", 0x00800000);
+    memory_region_init_io(&s->pci_discontiguous_io, obj,
+                          &raven_io_ops, &s->pci_io,
+                          "pci-discontiguous-io", 8 * MiB);
     memory_region_init(&s->pci_memory, obj, "pci-memory", 0x3f000000);
-    address_space_init(&s->pci_io_as, &s->pci_io, "raven-io");
-
-    /*
-     * Raven's raven_io_ops use the address-space API to access pci-conf-idx
-     * (which is also owned by the raven device). As such, mark the
-     * pci_io_non_contiguous as re-entrancy safe.
-     */
-    s->pci_io_non_contiguous.disable_reentrancy_guard = true;
 
     /* CPU address space */
     memory_region_add_subregion(address_space_mem, PCI_IO_BASE_ADDR,
                                 &s->pci_io);
     memory_region_add_subregion_overlap(address_space_mem, PCI_IO_BASE_ADDR,
-                                        &s->pci_io_non_contiguous, 1);
+                                        &s->pci_discontiguous_io, 1);
+    memory_region_set_enabled(&s->pci_discontiguous_io, false);
     memory_region_add_subregion(address_space_mem, 0xc0000000, &s->pci_memory);
 
     /* Bus master address space */
-- 
2.41.3

[PATCH v4 12/16] hw/pci-host/raven: Move bus master address space creation to one place

[BALATON Zoltan]

Move the lines related to creating the bus master address space
together and reduce the number of memory regions stored in the device
state. These are used once to create the address space and can be
tracked with their owner object so no need to keep track of them in
the device state. Keep only the address space that is used later in a
callback.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
---
 hw/pci-host/raven.c | 37 ++++++++++++++++++-------------------
 1 file changed, 18 insertions(+), 19 deletions(-)

diff --git a/hw/pci-host/raven.c b/hw/pci-host/raven.c
index bf4f4b7f71..ebf0c511dc 100644
--- a/hw/pci-host/raven.c
+++ b/hw/pci-host/raven.c
@@ -46,9 +46,6 @@ struct PREPPCIState {
     MemoryRegion pci_discontiguous_io;
     MemoryRegion pci_memory;
     MemoryRegion pci_intack;
-    MemoryRegion bm;
-    MemoryRegion bm_ram_alias;
-    MemoryRegion bm_pci_memory_alias;
     AddressSpace bm_as;
 };
 
@@ -178,7 +175,8 @@ static void raven_pcihost_realizefn(DeviceState *d, Error **errp)
     SysBusDevice *dev = SYS_BUS_DEVICE(d);
     PCIHostState *h = PCI_HOST_BRIDGE(dev);
     PREPPCIState *s = RAVEN_PCI_HOST_BRIDGE(dev);
-    MemoryRegion *mr, *address_space_mem = get_system_memory();
+    Object *o = OBJECT(d);
+    MemoryRegion *mr, *bm, *address_space_mem = get_system_memory();
 
     qdev_init_gpio_in(d, raven_change_gpio, 1);
 
@@ -187,26 +185,37 @@ static void raven_pcihost_realizefn(DeviceState *d, Error **errp)
                                    &s->irq, &s->pci_memory, &s->pci_io, 0, 1,
                                    TYPE_PCI_BUS);
 
-    memory_region_init_io(&h->conf_mem, OBJECT(h), &pci_host_conf_le_ops, s,
+    memory_region_init_io(&h->conf_mem, o, &pci_host_conf_le_ops, s,
                           "pci-conf-idx", 4);
     memory_region_add_subregion(&s->pci_io, 0xcf8, &h->conf_mem);
 
-    memory_region_init_io(&h->data_mem, OBJECT(h), &pci_host_data_le_ops, s,
+    memory_region_init_io(&h->data_mem, o, &pci_host_data_le_ops, s,
                           "pci-conf-data", 4);
     memory_region_add_subregion(&s->pci_io, 0xcfc, &h->data_mem);
 
     mr = g_new0(MemoryRegion, 1);
-    memory_region_init_io(mr, OBJECT(h), &raven_mmcfg_ops, h->bus,
+    memory_region_init_io(mr, o, &raven_mmcfg_ops, h->bus,
                           "pci-mmcfg", 8 * MiB);
     memory_region_add_subregion(&s->pci_io, 0x800000, mr);
 
-    memory_region_init_io(&s->pci_intack, OBJECT(s), &raven_intack_ops, s,
+    memory_region_init_io(&s->pci_intack, o, &raven_intack_ops, s,
                           "pci-intack", 1);
     memory_region_add_subregion(address_space_mem, 0xbffffff0, &s->pci_intack);
 
     pci_create_simple(h->bus, PCI_DEVFN(0, 0), TYPE_RAVEN_PCI_DEVICE);
 
-    address_space_init(&s->bm_as, &s->bm, "raven-bm");
+    /* Bus master address space */
+    bm = g_new0(MemoryRegion, 1);
+    memory_region_init(bm, o, "raven-bm", 4 * GiB);
+    mr = g_new0(MemoryRegion, 1);
+    memory_region_init_alias(mr, o, "bm-pci-memory", &s->pci_memory, 0,
+                             memory_region_size(&s->pci_memory));
+    memory_region_add_subregion(bm, 0, mr);
+    mr = g_new0(MemoryRegion, 1);
+    memory_region_init_alias(mr, o, "bm-system", get_system_memory(),
+                             0, 0x80000000);
+    memory_region_add_subregion(bm, 0x80000000, mr);
+    address_space_init(&s->bm_as, bm, "raven-bm-as");
     pci_setup_iommu(h->bus, &raven_iommu_ops, s);
 }
 
@@ -228,16 +237,6 @@ static void raven_pcihost_initfn(Object *obj)
                                         &s->pci_discontiguous_io, 1);
     memory_region_set_enabled(&s->pci_discontiguous_io, false);
     memory_region_add_subregion(address_space_mem, 0xc0000000, &s->pci_memory);
-
-    /* Bus master address space */
-    memory_region_init(&s->bm, obj, "bm-raven", 4 * GiB);
-    memory_region_init_alias(&s->bm_pci_memory_alias, obj, "bm-pci-memory",
-                             &s->pci_memory, 0,
-                             memory_region_size(&s->pci_memory));
-    memory_region_init_alias(&s->bm_ram_alias, obj, "bm-system",
-                             get_system_memory(), 0, 0x80000000);
-    memory_region_add_subregion(&s->bm, 0         , &s->bm_pci_memory_alias);
-    memory_region_add_subregion(&s->bm, 0x80000000, &s->bm_ram_alias);
 }
 
 static void raven_pcihost_class_init(ObjectClass *klass, const void *data)
-- 
2.41.3

[PATCH v4 13/16] hw/pci-host/raven: Do not map regions in init method

[BALATON Zoltan]

Export memory regions as sysbus mmio regions and let the board code
map them similar to how it is done in grackle. While at it rename
raven_pcihost_realizefn to raven_pcihost_realize.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
---
 hw/pci-host/raven.c | 38 +++++++++++++-------------------------
 hw/ppc/prep.c       | 10 ++++++++--
 2 files changed, 21 insertions(+), 27 deletions(-)

diff --git a/hw/pci-host/raven.c b/hw/pci-host/raven.c
index ebf0c511dc..1e36a637a6 100644
--- a/hw/pci-host/raven.c
+++ b/hw/pci-host/raven.c
@@ -49,8 +49,6 @@ struct PREPPCIState {
     AddressSpace bm_as;
 };
 
-#define PCI_IO_BASE_ADDR    0x80000000  /* Physical address on main bus */
-
 static inline uint32_t raven_idsel_to_addr(hwaddr addr)
 {
     return (ctz16(addr >> 11) << 11) | (addr & 0x7ff);
@@ -170,7 +168,7 @@ static void raven_change_gpio(void *opaque, int n, int level)
     memory_region_set_enabled(&s->pci_discontiguous_io, !!level);
 }
 
-static void raven_pcihost_realizefn(DeviceState *d, Error **errp)
+static void raven_pcihost_realize(DeviceState *d, Error **errp)
 {
     SysBusDevice *dev = SYS_BUS_DEVICE(d);
     PCIHostState *h = PCI_HOST_BRIDGE(dev);
@@ -180,7 +178,18 @@ static void raven_pcihost_realizefn(DeviceState *d, Error **errp)
 
     qdev_init_gpio_in(d, raven_change_gpio, 1);
 
+    memory_region_init(&s->pci_io, o, "pci-io", 0x3f800000);
+    memory_region_init_io(&s->pci_discontiguous_io, o,
+                          &raven_io_ops, &s->pci_io,
+                          "pci-discontiguous-io", 8 * MiB);
+    memory_region_set_enabled(&s->pci_discontiguous_io, false);
+    memory_region_init(&s->pci_memory, o, "pci-memory", 0x3f000000);
+
+    sysbus_init_mmio(dev, &s->pci_io);
+    sysbus_init_mmio(dev, &s->pci_discontiguous_io);
+    sysbus_init_mmio(dev, &s->pci_memory);
     sysbus_init_irq(dev, &s->irq);
+
     h->bus = pci_register_root_bus(d, NULL, raven_set_irq, raven_map_irq,
                                    &s->irq, &s->pci_memory, &s->pci_io, 0, 1,
                                    TYPE_PCI_BUS);
@@ -219,32 +228,12 @@ static void raven_pcihost_realizefn(DeviceState *d, Error **errp)
     pci_setup_iommu(h->bus, &raven_iommu_ops, s);
 }
 
-static void raven_pcihost_initfn(Object *obj)
-{
-    PREPPCIState *s = RAVEN_PCI_HOST_BRIDGE(obj);
-    MemoryRegion *address_space_mem = get_system_memory();
-
-    memory_region_init(&s->pci_io, obj, "pci-io", 0x3f800000);
-    memory_region_init_io(&s->pci_discontiguous_io, obj,
-                          &raven_io_ops, &s->pci_io,
-                          "pci-discontiguous-io", 8 * MiB);
-    memory_region_init(&s->pci_memory, obj, "pci-memory", 0x3f000000);
-
-    /* CPU address space */
-    memory_region_add_subregion(address_space_mem, PCI_IO_BASE_ADDR,
-                                &s->pci_io);
-    memory_region_add_subregion_overlap(address_space_mem, PCI_IO_BASE_ADDR,
-                                        &s->pci_discontiguous_io, 1);
-    memory_region_set_enabled(&s->pci_discontiguous_io, false);
-    memory_region_add_subregion(address_space_mem, 0xc0000000, &s->pci_memory);
-}
-
 static void raven_pcihost_class_init(ObjectClass *klass, const void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
-    dc->realize = raven_pcihost_realizefn;
+    dc->realize = raven_pcihost_realize;
     dc->fw_name = "pci";
 }
 
@@ -278,7 +267,6 @@ static const TypeInfo raven_types[] = {
         .name = TYPE_RAVEN_PCI_HOST_BRIDGE,
         .parent = TYPE_PCI_HOST_BRIDGE,
         .instance_size = sizeof(PREPPCIState),
-        .instance_init = raven_pcihost_initfn,
         .class_init = raven_pcihost_class_init,
     },
     {
diff --git a/hw/ppc/prep.c b/hw/ppc/prep.c
index d3365414d2..ead91ec851 100644
--- a/hw/ppc/prep.c
+++ b/hw/ppc/prep.c
@@ -53,8 +53,11 @@
 
 #define CFG_ADDR 0xf0000510
 
-#define KERNEL_LOAD_ADDR 0x01000000
-#define INITRD_LOAD_ADDR 0x01800000
+#define KERNEL_LOAD_ADDR  0x01000000
+#define INITRD_LOAD_ADDR  0x01800000
+
+#define PCI_IO_BASE_ADDR  0x80000000
+#define PCI_MEM_BASE_ADDR 0xc0000000
 
 #define BIOS_ADDR         0xfff00000
 #define BIOS_SIZE         (1 * MiB)
@@ -293,6 +296,9 @@ static void ibm_40p_init(MachineState *machine)
     pcihost = SYS_BUS_DEVICE(dev);
     object_property_add_child(qdev_get_machine(), "raven", OBJECT(dev));
     sysbus_realize_and_unref(pcihost, &error_fatal);
+    sysbus_mmio_map(pcihost, 0, PCI_IO_BASE_ADDR);
+    sysbus_mmio_map_overlap(pcihost, 1, PCI_IO_BASE_ADDR, 1);
+    sysbus_mmio_map(pcihost, 2, PCI_MEM_BASE_ADDR);
     pci_bus = PCI_BUS(qdev_get_child_bus(dev, "pci.0"));
     if (!pci_bus) {
         error_report("could not create PCI host controller");
-- 
2.41.3

Re: [PATCH v4 13/16] hw/pci-host/raven: Do not map regions in init method

[Philippe Mathieu-Daudé]

On 18/10/25 16:04, BALATON Zoltan wrote:
> Export memory regions as sysbus mmio regions and let the board code
> map them similar to how it is done in grackle. While at it rename
> raven_pcihost_realizefn to raven_pcihost_realize.
> 
> Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
> ---
>   hw/pci-host/raven.c | 38 +++++++++++++-------------------------
>   hw/ppc/prep.c       | 10 ++++++++--
>   2 files changed, 21 insertions(+), 27 deletions(-)

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>

[PATCH v4 14/16] hw/ppc/prep: Always create prep-systemio

[BALATON Zoltan]

The prep-systemio device models the system control ports of the 40p
machine which is not an optional pluggable device but part of the
system so it should not be disabled by -nodefaults but always created.

Additionally remove some line breaks to make lines related to one
device appear in one block for logical separation from other devices.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
---
 hw/ppc/prep.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/hw/ppc/prep.c b/hw/ppc/prep.c
index ead91ec851..973d2fb7eb 100644
--- a/hw/ppc/prep.c
+++ b/hw/ppc/prep.c
@@ -317,6 +317,13 @@ static void ibm_40p_init(MachineState *machine)
     sysbus_connect_irq(pcihost, 0, qdev_get_gpio_in(i82378_dev, 15));
     isa_bus = ISA_BUS(qdev_get_child_bus(i82378_dev, "isa.0"));
 
+    /* system control ports */
+    isa_dev = isa_new("prep-systemio");
+    dev = DEVICE(isa_dev);
+    qdev_prop_set_uint32(dev, "ibm-planar-id", 0xfc);
+    qdev_prop_set_uint32(dev, "equipment", 0xc0);
+    isa_realize_and_unref(isa_dev, isa_bus, &error_fatal);
+
     /* Memory controller */
     isa_dev = isa_new("rs6000-mc");
     dev = DEVICE(isa_dev);
@@ -342,7 +349,6 @@ static void ibm_40p_init(MachineState *machine)
         dev = DEVICE(isa_dev);
         qdev_prop_set_uint32(dev, "iobase", 0x830);
         qdev_prop_set_uint32(dev, "irq", 10);
-
         if (machine->audiodev) {
             qdev_prop_set_string(dev, "audiodev", machine->audiodev);
         }
@@ -353,14 +359,7 @@ static void ibm_40p_init(MachineState *machine)
         qdev_prop_set_uint32(dev, "config", 12);
         isa_realize_and_unref(isa_dev, isa_bus, &error_fatal);
 
-        isa_dev = isa_new("prep-systemio");
-        dev = DEVICE(isa_dev);
-        qdev_prop_set_uint32(dev, "ibm-planar-id", 0xfc);
-        qdev_prop_set_uint32(dev, "equipment", 0xc0);
-        isa_realize_and_unref(isa_dev, isa_bus, &error_fatal);
-
-        dev = DEVICE(pci_create_simple(pci_bus, PCI_DEVFN(1, 0),
-                                       "lsi53c810"));
+        dev = DEVICE(pci_create_simple(pci_bus, PCI_DEVFN(1, 0), "lsi53c810"));
         lsi53c8xx_handle_legacy_cmdline(dev);
         qdev_connect_gpio_out(dev, 0, qdev_get_gpio_in(i82378_dev, 13));
 
-- 
2.41.3

Re: [PATCH v4 14/16] hw/ppc/prep: Always create prep-systemio

[Philippe Mathieu-Daudé]

On 18/10/25 16:04, BALATON Zoltan wrote:
> The prep-systemio device models the system control ports of the 40p
> machine which is not an optional pluggable device but part of the
> system so it should not be disabled by -nodefaults but always created.
> 
> Additionally remove some line breaks to make lines related to one
> device appear in one block for logical separation from other devices.
> 
> Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
> ---
>   hw/ppc/prep.c | 17 ++++++++---------
>   1 file changed, 8 insertions(+), 9 deletions(-)

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>

[PATCH v4 15/16] hw/ppc/prep: Fix non-contiguous IO control bit

[BALATON Zoltan]

The bit that is supposed to control if ISA IO ports are accessed with
discontiguous addresses was not connected so it did nothing. We can
now directly enable or disable the discontiguous region so allow the
bit to function. This did not cause a problem so far as nothing seems
to use this bit or discontiguous IO addresses.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
---
 hw/pci-host/raven.c    |  9 ---------
 hw/ppc/prep.c          |  3 +++
 hw/ppc/prep_systemio.c | 17 +++++++++++------
 3 files changed, 14 insertions(+), 15 deletions(-)

diff --git a/hw/pci-host/raven.c b/hw/pci-host/raven.c
index 1e36a637a6..7ebca8186b 100644
--- a/hw/pci-host/raven.c
+++ b/hw/pci-host/raven.c
@@ -161,13 +161,6 @@ static const PCIIOMMUOps raven_iommu_ops = {
     .get_address_space = raven_pcihost_set_iommu,
 };
 
-static void raven_change_gpio(void *opaque, int n, int level)
-{
-    PREPPCIState *s = opaque;
-
-    memory_region_set_enabled(&s->pci_discontiguous_io, !!level);
-}
-
 static void raven_pcihost_realize(DeviceState *d, Error **errp)
 {
     SysBusDevice *dev = SYS_BUS_DEVICE(d);
@@ -176,8 +169,6 @@ static void raven_pcihost_realize(DeviceState *d, Error **errp)
     Object *o = OBJECT(d);
     MemoryRegion *mr, *bm, *address_space_mem = get_system_memory();
 
-    qdev_init_gpio_in(d, raven_change_gpio, 1);
-
     memory_region_init(&s->pci_io, o, "pci-io", 0x3f800000);
     memory_region_init_io(&s->pci_discontiguous_io, o,
                           &raven_io_ops, &s->pci_io,
diff --git a/hw/ppc/prep.c b/hw/ppc/prep.c
index 973d2fb7eb..3f497910f4 100644
--- a/hw/ppc/prep.c
+++ b/hw/ppc/prep.c
@@ -322,6 +322,9 @@ static void ibm_40p_init(MachineState *machine)
     dev = DEVICE(isa_dev);
     qdev_prop_set_uint32(dev, "ibm-planar-id", 0xfc);
     qdev_prop_set_uint32(dev, "equipment", 0xc0);
+    object_property_set_link(OBJECT(dev), "discontiguous-io",
+                             OBJECT(sysbus_mmio_get_region(pcihost, 1)),
+                             &error_fatal);
     isa_realize_and_unref(isa_dev, isa_bus, &error_fatal);
 
     /* Memory controller */
diff --git a/hw/ppc/prep_systemio.c b/hw/ppc/prep_systemio.c
index 41cd923b94..6ef9b91317 100644
--- a/hw/ppc/prep_systemio.c
+++ b/hw/ppc/prep_systemio.c
@@ -44,9 +44,10 @@ OBJECT_DECLARE_SIMPLE_TYPE(PrepSystemIoState, PREP_SYSTEMIO)
 
 struct PrepSystemIoState {
     ISADevice parent_obj;
+
     MemoryRegion ppc_parity_mem;
+    MemoryRegion *discontiguous_io;
 
-    qemu_irq non_contiguous_io_map_irq;
     uint8_t sreset; /* 0x0092 */
     uint8_t equipment; /* 0x080c */
     uint8_t system_control; /* 0x081c */
@@ -206,8 +207,8 @@ static void prep_port0850_write(void *opaque, uint32_t addr, uint32_t val)
     PrepSystemIoState *s = opaque;
 
     trace_prep_systemio_write(addr, val);
-    qemu_set_irq(s->non_contiguous_io_map_irq,
-                 val & PORT0850_IOMAP_NONCONTIGUOUS);
+    memory_region_set_enabled(s->discontiguous_io,
+                              !(val & PORT0850_IOMAP_NONCONTIGUOUS));
     s->iomap_type = val & PORT0850_IOMAP_NONCONTIGUOUS;
 }
 
@@ -257,10 +258,10 @@ static void prep_systemio_realize(DeviceState *dev, Error **errp)
     PrepSystemIoState *s = PREP_SYSTEMIO(dev);
     PowerPCCPU *cpu;
 
-    qdev_init_gpio_out(dev, &s->non_contiguous_io_map_irq, 1);
+    assert(s->discontiguous_io);
     s->iomap_type = PORT0850_IOMAP_NONCONTIGUOUS;
-    qemu_set_irq(s->non_contiguous_io_map_irq,
-                 s->iomap_type & PORT0850_IOMAP_NONCONTIGUOUS);
+    memory_region_set_enabled(s->discontiguous_io,
+                              !(s->iomap_type & PORT0850_IOMAP_NONCONTIGUOUS));
     cpu = POWERPC_CPU(first_cpu);
     s->softreset_irq = qdev_get_gpio_in(DEVICE(cpu), PPC6xx_INPUT_HRESET);
 
@@ -288,6 +289,8 @@ static const VMStateDescription vmstate_prep_systemio = {
 static const Property prep_systemio_properties[] = {
     DEFINE_PROP_UINT8("ibm-planar-id", PrepSystemIoState, ibm_planar_id, 0),
     DEFINE_PROP_UINT8("equipment", PrepSystemIoState, equipment, 0),
+    DEFINE_PROP_LINK("discontiguous-io", PrepSystemIoState, discontiguous_io,
+                     TYPE_MEMORY_REGION, MemoryRegion *),
 };
 
 static void prep_systemio_class_initfn(ObjectClass *klass, const void *data)
@@ -296,6 +299,8 @@ static void prep_systemio_class_initfn(ObjectClass *klass, const void *data)
 
     dc->realize = prep_systemio_realize;
     dc->vmsd = &vmstate_prep_systemio;
+    /* Reason: PReP specific device, needs to be wired via properties */
+    dc->user_creatable = false;
     device_class_set_props(dc, prep_systemio_properties);
 }
 
-- 
2.41.3

[PATCH v4 16/16] hw/ppc/prep: Add reset method to prep-systemio

[BALATON Zoltan]

The initial state needs to be reset so it's not enough to set it once
at realize. Add a reset method to fix device reset state.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
---
 hw/pci-host/raven.c    |  1 -
 hw/ppc/prep_systemio.c | 13 ++++++++++---
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/hw/pci-host/raven.c b/hw/pci-host/raven.c
index 7ebca8186b..fd45acb7eb 100644
--- a/hw/pci-host/raven.c
+++ b/hw/pci-host/raven.c
@@ -173,7 +173,6 @@ static void raven_pcihost_realize(DeviceState *d, Error **errp)
     memory_region_init_io(&s->pci_discontiguous_io, o,
                           &raven_io_ops, &s->pci_io,
                           "pci-discontiguous-io", 8 * MiB);
-    memory_region_set_enabled(&s->pci_discontiguous_io, false);
     memory_region_init(&s->pci_memory, o, "pci-memory", 0x3f000000);
 
     sysbus_init_mmio(dev, &s->pci_io);
diff --git a/hw/ppc/prep_systemio.c b/hw/ppc/prep_systemio.c
index 6ef9b91317..13b8fdb56b 100644
--- a/hw/ppc/prep_systemio.c
+++ b/hw/ppc/prep_systemio.c
@@ -252,6 +252,15 @@ static const MemoryRegionOps ppc_parity_error_ops = {
     },
 };
 
+static void prep_systemio_reset(DeviceState *dev)
+{
+    PrepSystemIoState *s = PREP_SYSTEMIO(dev);
+
+    s->iomap_type = PORT0850_IOMAP_NONCONTIGUOUS;
+    memory_region_set_enabled(s->discontiguous_io,
+                              !(s->iomap_type & PORT0850_IOMAP_NONCONTIGUOUS));
+}
+
 static void prep_systemio_realize(DeviceState *dev, Error **errp)
 {
     ISADevice *isa = ISA_DEVICE(dev);
@@ -259,9 +268,6 @@ static void prep_systemio_realize(DeviceState *dev, Error **errp)
     PowerPCCPU *cpu;
 
     assert(s->discontiguous_io);
-    s->iomap_type = PORT0850_IOMAP_NONCONTIGUOUS;
-    memory_region_set_enabled(s->discontiguous_io,
-                              !(s->iomap_type & PORT0850_IOMAP_NONCONTIGUOUS));
     cpu = POWERPC_CPU(first_cpu);
     s->softreset_irq = qdev_get_gpio_in(DEVICE(cpu), PPC6xx_INPUT_HRESET);
 
@@ -301,6 +307,7 @@ static void prep_systemio_class_initfn(ObjectClass *klass, const void *data)
     dc->vmsd = &vmstate_prep_systemio;
     /* Reason: PReP specific device, needs to be wired via properties */
     dc->user_creatable = false;
+    device_class_set_legacy_reset(dc, prep_systemio_reset);
     device_class_set_props(dc, prep_systemio_properties);
 }
 
-- 
2.41.3

Re: [PATCH v4 00/16] hw/pci-host/raven clean ups

[Harsh Prateek Bora]

+ Mark (since he reviewed v3)
+ Michael, Marcel (for changes in include/hw/pci/pci_host.h , although 
appear safe as only raven specific)

On 10/18/25 19:34, BALATON Zoltan wrote:
> Hello,
> 
> This series cleans up and simplifies the raven model which does some
> strange stuff that no other pci-host is doing and does it in a
> convoluted way and also has some legacy bits that can be removed.
> Apart from making the model much more readable this also fixes the
> non-contiguous IO control bit which was there but did not work as it
> was not connected but apparently it's not really used by any guest so
> that wasn't noticed.
> 
> Regards,
> BALATON Zoltan
> 
> Link to previous version:
> https://patchew.org/QEMU/cover.1758219840.git.balaton@eik.bme.hu/
> 
> V4:
> - added R-b tags from Mark and address some of his review comments
> (other comments not addressed were answered on the list explaining why
> I did not add them to this version)
> - added new patches to fix creation and reset of prep-systemio
> - rebased on master
> 
> V3:
> - rebase on master
> - Fix issue with device-crash-test reported by Akihiko Odaki: make
> sure device is correctly used by adding assert and making it not user
> creatable in patch 14.
> 
> v2:
> - rebase on master
> - add R-b tags from Philippe
> 
> BALATON Zoltan (16):
>    hw/pci-host/raven: Simplify PCI facing part
>    hw/pci-host/raven: Simplify host bridge type declaration
>    hw/pci-host/raven: Use DEFINE_TYPES macro
>    hw/pci-host/raven: Simplify PCI bus creation
>    hw/pci-host/raven: Simplify PCI interrupt routing
>    hw/pci-host/raven: Simplify direct config access address decoding
>    hw/pci-host/raven: Rename direct config access ops
>    hw/pci-host/raven: Use correct parameter in direct access ops
>    hw/pci-host/raven: Do not use parent object for mmcfg region
>    hw/pci-host/raven: Fix PCI config direct access region
>    hw/pci-host/raven: Simpify discontiguous IO access
>    hw/pci-host/raven: Move bus master address space creation to one place
>    hw/pci-host/raven: Do not map regions in init method
>    hw/ppc/prep: Always create prep-systemio
>    hw/ppc/prep: Fix non-contiguous IO control bit
>    hw/ppc/prep: Add reset method to prep-systemio
> 
>   hw/pci-host/raven.c       | 328 ++++++++++++--------------------------
>   hw/ppc/prep.c             |  35 ++--
>   hw/ppc/prep_systemio.c    |  26 ++-
>   include/hw/pci/pci_host.h |   1 -
>   4 files changed, 145 insertions(+), 245 deletions(-)
>