* [PATCH v3 1/7] hw/display/{cg3,tcx}: Do not use memory_region_init_rom_nomigrate()
2026-02-03 16:22 [PATCH v3 0/7] memory: Remove most _nomigrate variants BALATON Zoltan
@ 2026-02-03 16:22 ` BALATON Zoltan
2026-02-03 16:22 ` [PATCH v3 2/7] memory: Remove memory_region_init_rom_nomigrate() BALATON Zoltan
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: BALATON Zoltan @ 2026-02-03 16:22 UTC (permalink / raw)
To: qemu-devel
Cc: Peter Xu, Akihiko Odaki, Paolo Bonzini, Mark Cave-Ayland,
Gerd Hoffmann, Max Filippov, Peter Maydell,
Philippe Mathieu-Daudé
We could simply convert these to use memory_region_init_rom but that
would be a migration compatibility break so preserve current behaviour
for now.
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
---
hw/display/cg3.c | 6 ++++--
hw/display/tcx.c | 6 ++++--
2 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/hw/display/cg3.c b/hw/display/cg3.c
index 568d6048a6..44966e7586 100644
--- a/hw/display/cg3.c
+++ b/hw/display/cg3.c
@@ -282,8 +282,10 @@ static void cg3_initfn(Object *obj)
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
CG3State *s = CG3(obj);
- memory_region_init_rom_nomigrate(&s->rom, obj, "cg3.prom",
- FCODE_MAX_ROM_SIZE, &error_fatal);
+ memory_region_init_ram_flags_nomigrate(&s->rom, obj, "cg3.prom",
+ FCODE_MAX_ROM_SIZE, 0,
+ &error_fatal);
+ memory_region_set_readonly(&s->rom, true);
sysbus_init_mmio(sbd, &s->rom);
memory_region_init_io(&s->reg, obj, &cg3_reg_ops, s, "cg3.reg",
diff --git a/hw/display/tcx.c b/hw/display/tcx.c
index 36cad82abd..87fe7216ba 100644
--- a/hw/display/tcx.c
+++ b/hw/display/tcx.c
@@ -756,8 +756,10 @@ static void tcx_initfn(Object *obj)
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
TCXState *s = TCX(obj);
- memory_region_init_rom_nomigrate(&s->rom, obj, "tcx.prom",
- FCODE_MAX_ROM_SIZE, &error_fatal);
+ memory_region_init_ram_flags_nomigrate(&s->rom, obj, "tcx.prom",
+ FCODE_MAX_ROM_SIZE, 0,
+ &error_fatal);
+ memory_region_set_readonly(&s->rom, true);
sysbus_init_mmio(sbd, &s->rom);
/* 2/STIP : Stippler */
--
2.41.3
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH v3 2/7] memory: Remove memory_region_init_rom_nomigrate()
2026-02-03 16:22 [PATCH v3 0/7] memory: Remove most _nomigrate variants BALATON Zoltan
2026-02-03 16:22 ` [PATCH v3 1/7] hw/display/{cg3,tcx}: Do not use memory_region_init_rom_nomigrate() BALATON Zoltan
@ 2026-02-03 16:22 ` BALATON Zoltan
2026-02-03 16:22 ` [PATCH v3 3/7] memory: Remove memory_region_init_ram_nomigrate() BALATON Zoltan
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: BALATON Zoltan @ 2026-02-03 16:22 UTC (permalink / raw)
To: qemu-devel
Cc: Peter Xu, Akihiko Odaki, Paolo Bonzini, Mark Cave-Ayland,
Gerd Hoffmann, Max Filippov, Peter Maydell,
Philippe Mathieu-Daudé
All users were converted so no longer needed.
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
---
docs/devel/memory.rst | 1 -
include/system/memory.h | 26 -----------------
.../memory-region-housekeeping.cocci | 28 -------------------
system/memory.c | 19 ++-----------
4 files changed, 3 insertions(+), 71 deletions(-)
diff --git a/docs/devel/memory.rst b/docs/devel/memory.rst
index 8558f70a42..0bb5acab21 100644
--- a/docs/devel/memory.rst
+++ b/docs/devel/memory.rst
@@ -113,7 +113,6 @@ have a special case where you need to manage the migration of
the backing memory yourself, you can call the functions:
- memory_region_init_ram_nomigrate()
-- memory_region_init_rom_nomigrate()
which only initialize the MemoryRegion and leave handling
migration to the caller.
diff --git a/include/system/memory.h b/include/system/memory.h
index 0562af3136..7117699b10 100644
--- a/include/system/memory.h
+++ b/include/system/memory.h
@@ -1588,32 +1588,6 @@ void memory_region_init_alias(MemoryRegion *mr,
hwaddr offset,
uint64_t size);
-/**
- * memory_region_init_rom_nomigrate: Initialize a ROM memory region.
- *
- * This has the same effect as calling memory_region_init_ram_nomigrate()
- * and then marking the resulting region read-only with
- * memory_region_set_readonly().
- *
- * Note that this function does not do anything to cause the data in the
- * RAM side of the memory region to be migrated; that is the responsibility
- * of the caller.
- *
- * @mr: the #MemoryRegion to be initialized.
- * @owner: the object that tracks the region's reference count
- * @name: Region name, becomes part of RAMBlock name used in migration stream
- * must be unique within any device
- * @size: size of the region.
- * @errp: pointer to Error*, to store an error if it happens.
- *
- * Return: true on success, else false setting @errp with error.
- */
-bool memory_region_init_rom_nomigrate(MemoryRegion *mr,
- Object *owner,
- const char *name,
- uint64_t size,
- Error **errp);
-
/**
* memory_region_init_iommu: Initialize a memory region of a custom type
* that translates addresses
diff --git a/scripts/coccinelle/memory-region-housekeeping.cocci b/scripts/coccinelle/memory-region-housekeeping.cocci
index 7f89e9712e..e45703141a 100644
--- a/scripts/coccinelle/memory-region-housekeeping.cocci
+++ b/scripts/coccinelle/memory-region-housekeeping.cocci
@@ -16,17 +16,10 @@
expression E1, E2, E3, E4, E5;
symbol true;
@@
-(
- memory_region_init_ram(E1, E2, E3, E4, E5);
+ memory_region_init_rom(E1, E2, E3, E4, E5);
... WHEN != E1
- memory_region_set_readonly(E1, true);
-|
-- memory_region_init_ram_nomigrate(E1, E2, E3, E4, E5);
-+ memory_region_init_rom_nomigrate(E1, E2, E3, E4, E5);
- ... WHEN != E1
-- memory_region_set_readonly(E1, true);
-)
@possible_memory_region_init_rom@
@@ -53,11 +46,7 @@ cocci.print_main("potential use of memory_region_init_rom*() in ", p)
expression ROM, E1, E2, E3, E4;
expression ALIAS, E5, E6, E7, E8;
@@
-(
memory_region_init_rom(ROM, E1, E2, E3, E4);
-|
- memory_region_init_rom_nomigrate(ROM, E1, E2, E3, E4);
-)
...
memory_region_init_alias(ALIAS, E5, E6, ROM, E7, E8);
- memory_region_set_readonly(ALIAS, true);
@@ -80,23 +69,6 @@ expression ERRP;
...
-vmstate_register_ram_global(MR);
@@
-expression MR;
-expression NAME;
-expression SIZE;
-expression ERRP;
-@@
--memory_region_init_rom_nomigrate(MR, NULL, NAME, SIZE, ERRP);
-+memory_region_init_rom(MR, NULL, NAME, SIZE, ERRP);
- ...
--vmstate_register_ram_global(MR);
-@@
-expression MR;
-expression OPS;
-expression OPAQUE;
-expression NAME;
-expression SIZE;
-expression ERRP;
-@@
typedef DeviceState;
identifier device_fn, dev, obj;
expression E1, E2, E3, E4, E5;
diff --git a/system/memory.c b/system/memory.c
index c51d0798a8..65042bd9fa 100644
--- a/system/memory.c
+++ b/system/memory.c
@@ -1738,21 +1738,6 @@ void memory_region_init_alias(MemoryRegion *mr,
mr->alias_offset = offset;
}
-bool memory_region_init_rom_nomigrate(MemoryRegion *mr,
- Object *owner,
- const char *name,
- uint64_t size,
- Error **errp)
-{
- if (!memory_region_init_ram_flags_nomigrate(mr, owner, name,
- size, 0, errp)) {
- return false;
- }
- mr->readonly = true;
-
- return true;
-}
-
void memory_region_init_iommu(void *_iommu_mr,
size_t instance_size,
const char *mrtypename,
@@ -3757,9 +3742,11 @@ bool memory_region_init_rom(MemoryRegion *mr,
{
DeviceState *owner_dev;
- if (!memory_region_init_rom_nomigrate(mr, owner, name, size, errp)) {
+ if (!memory_region_init_ram_flags_nomigrate(mr, owner, name,
+ size, 0, errp)) {
return false;
}
+ mr->readonly = true;
/* This will assert if owner is neither NULL nor a DeviceState.
* We only want the owner here for the purposes of defining a
* unique name for migration. TODO: Ideally we should implement
--
2.41.3
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH v3 3/7] memory: Remove memory_region_init_ram_nomigrate()
2026-02-03 16:22 [PATCH v3 0/7] memory: Remove most _nomigrate variants BALATON Zoltan
2026-02-03 16:22 ` [PATCH v3 1/7] hw/display/{cg3,tcx}: Do not use memory_region_init_rom_nomigrate() BALATON Zoltan
2026-02-03 16:22 ` [PATCH v3 2/7] memory: Remove memory_region_init_rom_nomigrate() BALATON Zoltan
@ 2026-02-03 16:22 ` BALATON Zoltan
2026-02-03 16:22 ` [PATCH v3 4/7] memory: Factor out common ram region initialization BALATON Zoltan
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: BALATON Zoltan @ 2026-02-03 16:22 UTC (permalink / raw)
To: qemu-devel
Cc: Peter Xu, Akihiko Odaki, Paolo Bonzini, Mark Cave-Ayland,
Gerd Hoffmann, Max Filippov, Peter Maydell,
Philippe Mathieu-Daudé
This is rarely needed and those cases can use
memory_region_init_ram_flags_nomigrate() instead which is now the only
_nomigrate variant left. (Some of these may better be converted to use
memory_region_init_ram() but I don't know so left them as they are.)
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
---
docs/devel/memory.rst | 8 +++----
hw/display/tcx.c | 5 ++--
hw/display/vga.c | 4 ++--
hw/sparc/sun4m.c | 15 +++++++-----
hw/sparc64/sun4u.c | 9 ++++----
hw/xtensa/xtfpga.c | 4 ++--
include/system/memory.h | 23 -------------------
.../memory-region-housekeeping.cocci | 19 ---------------
system/memory.c | 13 ++---------
9 files changed, 26 insertions(+), 74 deletions(-)
diff --git a/docs/devel/memory.rst b/docs/devel/memory.rst
index 0bb5acab21..9083b18f08 100644
--- a/docs/devel/memory.rst
+++ b/docs/devel/memory.rst
@@ -110,11 +110,9 @@ migrated:
For most devices and boards this is the correct thing. If you
have a special case where you need to manage the migration of
-the backing memory yourself, you can call the functions:
-
-- memory_region_init_ram_nomigrate()
-
-which only initialize the MemoryRegion and leave handling
+the backing memory yourself, you can call the function
+memory_region_init_ram_flags_nomigrate()
+which only initializes the MemoryRegion and leaves handling
migration to the caller.
The functions:
diff --git a/hw/display/tcx.c b/hw/display/tcx.c
index 87fe7216ba..d6be297828 100644
--- a/hw/display/tcx.c
+++ b/hw/display/tcx.c
@@ -817,8 +817,9 @@ static void tcx_realizefn(DeviceState *dev, Error **errp)
uint8_t *vram_base;
char *fcode_filename;
- memory_region_init_ram_nomigrate(&s->vram_mem, OBJECT(s), "tcx.vram",
- s->vram_size * (1 + 4 + 4), &error_fatal);
+ memory_region_init_ram_flags_nomigrate(&s->vram_mem, OBJECT(s), "tcx.vram",
+ s->vram_size * (1 + 4 + 4), 0,
+ &error_fatal);
vmstate_register_ram_global(&s->vram_mem);
memory_region_set_log(&s->vram_mem, true, DIRTY_MEMORY_VGA);
vram_base = memory_region_get_ram_ptr(&s->vram_mem);
diff --git a/hw/display/vga.c b/hw/display/vga.c
index 59a65cbbff..ee7d97b5c2 100644
--- a/hw/display/vga.c
+++ b/hw/display/vga.c
@@ -2235,8 +2235,8 @@ bool vga_common_init(VGACommonState *s, Object *obj, Error **errp)
return false;
}
- memory_region_init_ram_nomigrate(&s->vram, obj, "vga.vram", s->vram_size,
- &local_err);
+ memory_region_init_ram_flags_nomigrate(&s->vram, obj, "vga.vram",
+ s->vram_size, 0, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return false;
diff --git a/hw/sparc/sun4m.c b/hw/sparc/sun4m.c
index 0c0d658d30..66a21ae86c 100644
--- a/hw/sparc/sun4m.c
+++ b/hw/sparc/sun4m.c
@@ -587,8 +587,10 @@ static void idreg_realize(DeviceState *ds, Error **errp)
IDRegState *s = MACIO_ID_REGISTER(ds);
SysBusDevice *dev = SYS_BUS_DEVICE(ds);
- if (!memory_region_init_ram_nomigrate(&s->mem, OBJECT(ds), "sun4m.idreg",
- sizeof(idreg_data), errp)) {
+ if (!memory_region_init_ram_flags_nomigrate(&s->mem, OBJECT(ds),
+ "sun4m.idreg",
+ sizeof(idreg_data),
+ 0, errp)) {
return;
}
@@ -638,8 +640,8 @@ static void afx_realize(DeviceState *ds, Error **errp)
AFXState *s = TCX_AFX(ds);
SysBusDevice *dev = SYS_BUS_DEVICE(ds);
- if (!memory_region_init_ram_nomigrate(&s->mem, OBJECT(ds), "sun4m.afx",
- 4, errp)) {
+ if (!memory_region_init_ram_flags_nomigrate(&s->mem, OBJECT(ds),
+ "sun4m.afx", 4, 0, errp)) {
return;
}
@@ -719,8 +721,9 @@ static void prom_realize(DeviceState *ds, Error **errp)
PROMState *s = OPENPROM(ds);
SysBusDevice *dev = SYS_BUS_DEVICE(ds);
- if (!memory_region_init_ram_nomigrate(&s->prom, OBJECT(ds), "sun4m.prom",
- PROM_SIZE_MAX, errp)) {
+ if (!memory_region_init_ram_flags_nomigrate(&s->prom, OBJECT(ds),
+ "sun4m.prom", PROM_SIZE_MAX, 0,
+ errp)) {
return;
}
diff --git a/hw/sparc64/sun4u.c b/hw/sparc64/sun4u.c
index 5d7787fc1a..0da0eef74c 100644
--- a/hw/sparc64/sun4u.c
+++ b/hw/sparc64/sun4u.c
@@ -455,8 +455,9 @@ static void prom_realize(DeviceState *ds, Error **errp)
PROMState *s = OPENPROM(ds);
SysBusDevice *dev = SYS_BUS_DEVICE(ds);
- if (!memory_region_init_ram_nomigrate(&s->prom, OBJECT(ds), "sun4u.prom",
- PROM_SIZE_MAX, errp)) {
+ if (!memory_region_init_ram_flags_nomigrate(&s->prom, OBJECT(ds),
+ "sun4u.prom", PROM_SIZE_MAX, 0,
+ errp)) {
return;
}
@@ -498,8 +499,8 @@ static void ram_realize(DeviceState *dev, Error **errp)
RamDevice *d = SUN4U_RAM(dev);
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
- memory_region_init_ram_nomigrate(&d->ram, OBJECT(d), "sun4u.ram", d->size,
- &error_fatal);
+ memory_region_init_ram_flags_nomigrate(&d->ram, OBJECT(d), "sun4u.ram",
+ d->size, 0, &error_fatal);
vmstate_register_ram_global(&d->ram);
sysbus_init_mmio(sbd, &d->ram);
}
diff --git a/hw/xtensa/xtfpga.c b/hw/xtensa/xtfpga.c
index d427d68e50..b025cc53a8 100644
--- a/hw/xtensa/xtfpga.c
+++ b/hw/xtensa/xtfpga.c
@@ -163,8 +163,8 @@ static void xtfpga_net_init(MemoryRegion *address_space,
sysbus_mmio_get_region(s, 1));
ram = g_malloc(sizeof(*ram));
- memory_region_init_ram_nomigrate(ram, OBJECT(s), "open_eth.ram", 16 * KiB,
- &error_fatal);
+ memory_region_init_ram_flags_nomigrate(ram, OBJECT(s), "open_eth.ram",
+ 16 * KiB, 0, &error_fatal);
vmstate_register_ram_global(ram);
memory_region_add_subregion(address_space, buffers, ram);
}
diff --git a/include/system/memory.h b/include/system/memory.h
index 7117699b10..d4793a08a7 100644
--- a/include/system/memory.h
+++ b/include/system/memory.h
@@ -1374,29 +1374,6 @@ void memory_region_init_io(MemoryRegion *mr,
const char *name,
uint64_t size);
-/**
- * memory_region_init_ram_nomigrate: Initialize RAM memory region. Accesses
- * into the region will modify memory
- * directly.
- *
- * @mr: the #MemoryRegion to be initialized.
- * @owner: the object that tracks the region's reference count
- * @name: Region name, becomes part of RAMBlock name used in migration stream
- * must be unique within any device
- * @size: size of the region.
- * @errp: pointer to Error*, to store an error if it happens.
- *
- * Note that this function does not do anything to cause the data in the
- * RAM memory region to be migrated; that is the responsibility of the caller.
- *
- * Return: true on success, else false setting @errp with error.
- */
-bool memory_region_init_ram_nomigrate(MemoryRegion *mr,
- Object *owner,
- const char *name,
- uint64_t size,
- Error **errp);
-
/**
* memory_region_init_ram_flags_nomigrate: Initialize RAM memory region.
* Accesses into the region will
diff --git a/scripts/coccinelle/memory-region-housekeeping.cocci b/scripts/coccinelle/memory-region-housekeeping.cocci
index e45703141a..b23647a3d8 100644
--- a/scripts/coccinelle/memory-region-housekeeping.cocci
+++ b/scripts/coccinelle/memory-region-housekeeping.cocci
@@ -26,15 +26,9 @@ symbol true;
expression E1, E2, E3, E4, E5;
position p;
@@
-(
memory_region_init_ram@p(E1, E2, E3, E4, E5);
...
memory_region_set_readonly(E1, true);
-|
- memory_region_init_ram_nomigrate@p(E1, E2, E3, E4, E5);
- ...
- memory_region_set_readonly(E1, true);
-)
@script:python@
p << possible_memory_region_init_rom.p;
@@
@@ -52,23 +46,10 @@ expression ALIAS, E5, E6, E7, E8;
- memory_region_set_readonly(ALIAS, true);
-// Replace by-hand memory_region_init_ram_nomigrate/vmstate_register_ram
-// code sequences with use of the new memory_region_init_ram function.
-// Similarly for the _rom and _rom_device functions.
// We don't try to replace sequences with a non-NULL owner, because
// there are none in the tree that can be automatically converted
// (and only a handful that can be manually converted).
@@
-expression MR;
-expression NAME;
-expression SIZE;
-expression ERRP;
-@@
--memory_region_init_ram_nomigrate(MR, NULL, NAME, SIZE, ERRP);
-+memory_region_init_ram(MR, NULL, NAME, SIZE, ERRP);
- ...
--vmstate_register_ram_global(MR);
-@@
typedef DeviceState;
identifier device_fn, dev, obj;
expression E1, E2, E3, E4, E5;
diff --git a/system/memory.c b/system/memory.c
index 65042bd9fa..e15f931a8a 100644
--- a/system/memory.c
+++ b/system/memory.c
@@ -1579,16 +1579,6 @@ void memory_region_init_io(MemoryRegion *mr,
memory_region_set_ops(mr, ops, opaque);
}
-bool memory_region_init_ram_nomigrate(MemoryRegion *mr,
- Object *owner,
- const char *name,
- uint64_t size,
- Error **errp)
-{
- return memory_region_init_ram_flags_nomigrate(mr, owner, name,
- size, 0, errp);
-}
-
bool memory_region_init_ram_flags_nomigrate(MemoryRegion *mr,
Object *owner,
const char *name,
@@ -3695,7 +3685,8 @@ bool memory_region_init_ram(MemoryRegion *mr,
{
DeviceState *owner_dev;
- if (!memory_region_init_ram_nomigrate(mr, owner, name, size, errp)) {
+ if (!memory_region_init_ram_flags_nomigrate(mr, owner, name,
+ size, 0, errp)) {
return false;
}
/* This will assert if owner is neither NULL nor a DeviceState.
--
2.41.3
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH v3 4/7] memory: Factor out common ram region initialization
2026-02-03 16:22 [PATCH v3 0/7] memory: Remove most _nomigrate variants BALATON Zoltan
` (2 preceding siblings ...)
2026-02-03 16:22 ` [PATCH v3 3/7] memory: Remove memory_region_init_ram_nomigrate() BALATON Zoltan
@ 2026-02-03 16:22 ` BALATON Zoltan
2026-02-03 16:22 ` [PATCH v3 5/7] memory: Add internal memory_region_register_ram function BALATON Zoltan
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: BALATON Zoltan @ 2026-02-03 16:22 UTC (permalink / raw)
To: qemu-devel
Cc: Peter Xu, Akihiko Odaki, Paolo Bonzini, Mark Cave-Ayland,
Gerd Hoffmann, Max Filippov, Peter Maydell,
Philippe Mathieu-Daudé
Introduce internal memory_region_do_init_ram() function to remove
duplicated code from different memory_region_init_*ram functions.
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
---
system/memory.c | 129 ++++++++++++++++++------------------------------
1 file changed, 47 insertions(+), 82 deletions(-)
diff --git a/system/memory.c b/system/memory.c
index e15f931a8a..2c5e8b2a15 100644
--- a/system/memory.c
+++ b/system/memory.c
@@ -1579,19 +1579,18 @@ void memory_region_init_io(MemoryRegion *mr,
memory_region_set_ops(mr, ops, opaque);
}
-bool memory_region_init_ram_flags_nomigrate(MemoryRegion *mr,
- Object *owner,
- const char *name,
- uint64_t size,
- uint32_t ram_flags,
- Error **errp)
+/*
+ * Called after allocating mr->ram_block with a qemu_ram_alloc_* function it
+ * finishes setting memory region as ram and checks for err, returns true on
+ * success or propagates error to errp and frees memory region on error
+ * returning false.
+ */
+static bool memory_region_do_init_ram(MemoryRegion *mr,
+ Error *err, Error **errp)
{
- Error *err = NULL;
- memory_region_init(mr, owner, name, size);
mr->ram = true;
mr->terminates = true;
mr->destructor = memory_region_destructor_ram;
- mr->ram_block = qemu_ram_alloc(size, ram_flags, mr, &err);
if (err) {
mr->size = int128_zero();
object_unparent(OBJECT(mr));
@@ -1601,6 +1600,17 @@ bool memory_region_init_ram_flags_nomigrate(MemoryRegion *mr,
return true;
}
+bool memory_region_init_ram_flags_nomigrate(MemoryRegion *mr, Object *owner,
+ const char *name, uint64_t size,
+ uint32_t ram_flags, Error **errp)
+{
+ Error *err = NULL;
+
+ memory_region_init(mr, owner, name, size);
+ mr->ram_block = qemu_ram_alloc(size, ram_flags, mr, &err);
+ return memory_region_do_init_ram(mr, err, errp);
+}
+
bool memory_region_init_resizeable_ram(MemoryRegion *mr,
Object *owner,
const char *name,
@@ -1612,108 +1622,66 @@ bool memory_region_init_resizeable_ram(MemoryRegion *mr,
Error **errp)
{
Error *err = NULL;
+
memory_region_init(mr, owner, name, size);
- mr->ram = true;
- mr->terminates = true;
- mr->destructor = memory_region_destructor_ram;
- mr->ram_block = qemu_ram_alloc_resizeable(size, max_size, resized,
- mr, &err);
- if (err) {
- mr->size = int128_zero();
- object_unparent(OBJECT(mr));
- error_propagate(errp, err);
- return false;
- }
- return true;
+ mr->ram_block = qemu_ram_alloc_resizeable(size, max_size, resized, mr,
+ &err);
+ return memory_region_do_init_ram(mr, err, errp);
}
#if defined(CONFIG_POSIX) && !defined(EMSCRIPTEN)
-bool memory_region_init_ram_from_file(MemoryRegion *mr,
- Object *owner,
- const char *name,
- uint64_t size,
- uint64_t align,
- uint32_t ram_flags,
- const char *path,
- ram_addr_t offset,
+bool memory_region_init_ram_from_file(MemoryRegion *mr, Object *owner,
+ const char *name, uint64_t size,
+ uint64_t align, uint32_t ram_flags,
+ const char *path, ram_addr_t offset,
Error **errp)
{
Error *err = NULL;
+
memory_region_init(mr, owner, name, size);
- mr->ram = true;
mr->readonly = !!(ram_flags & RAM_READONLY);
- mr->terminates = true;
- mr->destructor = memory_region_destructor_ram;
mr->align = align;
- mr->ram_block = qemu_ram_alloc_from_file(size, mr, ram_flags, path,
- offset, &err);
- if (err) {
- mr->size = int128_zero();
- object_unparent(OBJECT(mr));
- error_propagate(errp, err);
- return false;
- }
- return true;
+ mr->ram_block = qemu_ram_alloc_from_file(size, mr, ram_flags, path, offset,
+ &err);
+ return memory_region_do_init_ram(mr, err, errp);
}
-bool memory_region_init_ram_from_fd(MemoryRegion *mr,
- Object *owner,
- const char *name,
- uint64_t size,
- uint32_t ram_flags,
- int fd,
- ram_addr_t offset,
- Error **errp)
+bool memory_region_init_ram_from_fd(MemoryRegion *mr, Object *owner,
+ const char *name, uint64_t size,
+ uint32_t ram_flags, int fd,
+ ram_addr_t offset, Error **errp)
{
Error *err = NULL;
+
memory_region_init(mr, owner, name, size);
- mr->ram = true;
mr->readonly = !!(ram_flags & RAM_READONLY);
- mr->terminates = true;
- mr->destructor = memory_region_destructor_ram;
mr->ram_block = qemu_ram_alloc_from_fd(size, size, NULL, mr, ram_flags, fd,
offset, false, &err);
- if (err) {
- mr->size = int128_zero();
- object_unparent(OBJECT(mr));
- error_propagate(errp, err);
- return false;
- }
- return true;
+ return memory_region_do_init_ram(mr, err, errp);
}
#endif
-void memory_region_init_ram_ptr(MemoryRegion *mr,
- Object *owner,
- const char *name,
- uint64_t size,
- void *ptr)
+void memory_region_init_ram_ptr(MemoryRegion *mr, Object *owner,
+ const char *name, uint64_t size, void *ptr)
{
memory_region_init(mr, owner, name, size);
- mr->ram = true;
- mr->terminates = true;
- mr->destructor = memory_region_destructor_ram;
-
/* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */
assert(ptr != NULL);
mr->ram_block = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_abort);
+ memory_region_do_init_ram(mr, NULL, NULL);
}
-void memory_region_init_ram_device_ptr(MemoryRegion *mr,
- Object *owner,
- const char *name,
- uint64_t size,
+void memory_region_init_ram_device_ptr(MemoryRegion *mr, Object *owner,
+ const char *name, uint64_t size,
void *ptr)
{
memory_region_init(mr, owner, name, size);
- mr->ram = true;
- mr->ram_device = true;
memory_region_set_ops(mr, &ram_device_mem_ops, mr);
- mr->destructor = memory_region_destructor_ram;
-
/* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */
assert(ptr != NULL);
mr->ram_block = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_abort);
+ memory_region_do_init_ram(mr, NULL, NULL);
+ mr->ram_device = true;
}
void memory_region_init_alias(MemoryRegion *mr,
@@ -3764,15 +3732,12 @@ bool memory_region_init_rom_device(MemoryRegion *mr,
assert(ops);
memory_region_init(mr, owner, name, size);
memory_region_set_ops(mr, ops, opaque);
- mr->rom_device = true;
- mr->destructor = memory_region_destructor_ram;
mr->ram_block = qemu_ram_alloc(size, 0, mr, &err);
- if (err) {
- mr->size = int128_zero();
- object_unparent(OBJECT(mr));
- error_propagate(errp, err);
+ if (!memory_region_do_init_ram(mr, err, errp)) {
return false;
}
+ mr->ram = false;
+ mr->rom_device = true;
/* This will assert if owner is neither NULL nor a DeviceState.
* We only want the owner here for the purposes of defining a
* unique name for migration. TODO: Ideally we should implement
--
2.41.3
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH v3 5/7] memory: Add internal memory_region_register_ram function
2026-02-03 16:22 [PATCH v3 0/7] memory: Remove most _nomigrate variants BALATON Zoltan
` (3 preceding siblings ...)
2026-02-03 16:22 ` [PATCH v3 4/7] memory: Factor out common ram region initialization BALATON Zoltan
@ 2026-02-03 16:22 ` BALATON Zoltan
2026-02-03 16:22 ` [PATCH v3 6/7] memory: Shorten memory_region_init_rom_device BALATON Zoltan
2026-02-03 16:22 ` [PATCH v3 7/7] memory: Factor out more common ram region initialization BALATON Zoltan
6 siblings, 0 replies; 8+ messages in thread
From: BALATON Zoltan @ 2026-02-03 16:22 UTC (permalink / raw)
To: qemu-devel
Cc: Peter Xu, Akihiko Odaki, Paolo Bonzini, Mark Cave-Ayland,
Gerd Hoffmann, Max Filippov, Peter Maydell,
Philippe Mathieu-Daudé
Factor out common operation from memory_region_init_{ram,rom}
functions to register the region for migration. This avoids
duplicating the long comment in several functions.
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
system/memory.c | 76 ++++++++++++++-----------------------------------
1 file changed, 21 insertions(+), 55 deletions(-)
diff --git a/system/memory.c b/system/memory.c
index 2c5e8b2a15..c3465d7ffe 100644
--- a/system/memory.c
+++ b/system/memory.c
@@ -3645,18 +3645,10 @@ void mtree_info(bool flatview, bool dispatch_tree, bool owner, bool disabled)
}
}
-bool memory_region_init_ram(MemoryRegion *mr,
- Object *owner,
- const char *name,
- uint64_t size,
- Error **errp)
+static void memory_region_register_ram(MemoryRegion *mr, Object *owner)
{
DeviceState *owner_dev;
- if (!memory_region_init_ram_flags_nomigrate(mr, owner, name,
- size, 0, errp)) {
- return false;
- }
/* This will assert if owner is neither NULL nor a DeviceState.
* We only want the owner here for the purposes of defining a
* unique name for migration. TODO: Ideally we should implement
@@ -3665,68 +3657,50 @@ bool memory_region_init_ram(MemoryRegion *mr,
*/
owner_dev = DEVICE(owner);
vmstate_register_ram(mr, owner_dev);
+}
+bool memory_region_init_ram(MemoryRegion *mr, Object *owner,
+ const char *name, uint64_t size,
+ Error **errp)
+{
+ if (!memory_region_init_ram_flags_nomigrate(mr, owner, name, size,
+ 0, errp)) {
+ return false;
+ }
+ memory_region_register_ram(mr, owner);
return true;
}
-bool memory_region_init_ram_guest_memfd(MemoryRegion *mr,
- Object *owner,
- const char *name,
- uint64_t size,
+bool memory_region_init_ram_guest_memfd(MemoryRegion *mr, Object *owner,
+ const char *name, uint64_t size,
Error **errp)
{
- DeviceState *owner_dev;
-
if (!memory_region_init_ram_flags_nomigrate(mr, owner, name, size,
RAM_GUEST_MEMFD, errp)) {
return false;
}
- /* This will assert if owner is neither NULL nor a DeviceState.
- * We only want the owner here for the purposes of defining a
- * unique name for migration. TODO: Ideally we should implement
- * a naming scheme for Objects which are not DeviceStates, in
- * which case we can relax this restriction.
- */
- owner_dev = DEVICE(owner);
- vmstate_register_ram(mr, owner_dev);
-
+ memory_region_register_ram(mr, owner);
return true;
}
-bool memory_region_init_rom(MemoryRegion *mr,
- Object *owner,
- const char *name,
- uint64_t size,
+bool memory_region_init_rom(MemoryRegion *mr, Object *owner,
+ const char *name, uint64_t size,
Error **errp)
{
- DeviceState *owner_dev;
-
if (!memory_region_init_ram_flags_nomigrate(mr, owner, name,
size, 0, errp)) {
return false;
}
mr->readonly = true;
- /* This will assert if owner is neither NULL nor a DeviceState.
- * We only want the owner here for the purposes of defining a
- * unique name for migration. TODO: Ideally we should implement
- * a naming scheme for Objects which are not DeviceStates, in
- * which case we can relax this restriction.
- */
- owner_dev = DEVICE(owner);
- vmstate_register_ram(mr, owner_dev);
-
+ memory_region_register_ram(mr, owner);
return true;
}
-bool memory_region_init_rom_device(MemoryRegion *mr,
- Object *owner,
- const MemoryRegionOps *ops,
- void *opaque,
- const char *name,
- uint64_t size,
+bool memory_region_init_rom_device(MemoryRegion *mr, Object *owner,
+ const MemoryRegionOps *ops, void *opaque,
+ const char *name, uint64_t size,
Error **errp)
{
- DeviceState *owner_dev;
Error *err = NULL;
assert(ops);
@@ -3738,15 +3712,7 @@ bool memory_region_init_rom_device(MemoryRegion *mr,
}
mr->ram = false;
mr->rom_device = true;
- /* This will assert if owner is neither NULL nor a DeviceState.
- * We only want the owner here for the purposes of defining a
- * unique name for migration. TODO: Ideally we should implement
- * a naming scheme for Objects which are not DeviceStates, in
- * which case we can relax this restriction.
- */
- owner_dev = DEVICE(owner);
- vmstate_register_ram(mr, owner_dev);
-
+ memory_region_register_ram(mr, owner);
return true;
}
--
2.41.3
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH v3 6/7] memory: Shorten memory_region_init_rom_device
2026-02-03 16:22 [PATCH v3 0/7] memory: Remove most _nomigrate variants BALATON Zoltan
` (4 preceding siblings ...)
2026-02-03 16:22 ` [PATCH v3 5/7] memory: Add internal memory_region_register_ram function BALATON Zoltan
@ 2026-02-03 16:22 ` BALATON Zoltan
2026-02-03 16:22 ` [PATCH v3 7/7] memory: Factor out more common ram region initialization BALATON Zoltan
6 siblings, 0 replies; 8+ messages in thread
From: BALATON Zoltan @ 2026-02-03 16:22 UTC (permalink / raw)
To: qemu-devel
Cc: Peter Xu, Akihiko Odaki, Paolo Bonzini, Mark Cave-Ayland,
Gerd Hoffmann, Max Filippov, Peter Maydell,
Philippe Mathieu-Daudé
We can reuse memory_region_init_io in memory_region_init_rom_device.
Also shorten some other function prototypes.
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
---
system/memory.c | 21 +++++++--------------
1 file changed, 7 insertions(+), 14 deletions(-)
diff --git a/system/memory.c b/system/memory.c
index c3465d7ffe..74179463ea 100644
--- a/system/memory.c
+++ b/system/memory.c
@@ -1568,12 +1568,9 @@ static void memory_region_set_ops(MemoryRegion *mr,
mr->terminates = true;
}
-void memory_region_init_io(MemoryRegion *mr,
- Object *owner,
- const MemoryRegionOps *ops,
- void *opaque,
- const char *name,
- uint64_t size)
+void memory_region_init_io(MemoryRegion *mr, Object *owner,
+ const MemoryRegionOps *ops, void *opaque,
+ const char *name, uint64_t size)
{
memory_region_init(mr, owner, name, size);
memory_region_set_ops(mr, ops, opaque);
@@ -1684,12 +1681,9 @@ void memory_region_init_ram_device_ptr(MemoryRegion *mr, Object *owner,
mr->ram_device = true;
}
-void memory_region_init_alias(MemoryRegion *mr,
- Object *owner,
- const char *name,
- MemoryRegion *orig,
- hwaddr offset,
- uint64_t size)
+void memory_region_init_alias(MemoryRegion *mr, Object *owner,
+ const char *name, MemoryRegion *orig,
+ hwaddr offset, uint64_t size)
{
memory_region_init(mr, owner, name, size);
mr->alias = orig;
@@ -3704,8 +3698,7 @@ bool memory_region_init_rom_device(MemoryRegion *mr, Object *owner,
Error *err = NULL;
assert(ops);
- memory_region_init(mr, owner, name, size);
- memory_region_set_ops(mr, ops, opaque);
+ memory_region_init_io(mr, owner, ops, opaque, name, size);
mr->ram_block = qemu_ram_alloc(size, 0, mr, &err);
if (!memory_region_do_init_ram(mr, err, errp)) {
return false;
--
2.41.3
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH v3 7/7] memory: Factor out more common ram region initialization
2026-02-03 16:22 [PATCH v3 0/7] memory: Remove most _nomigrate variants BALATON Zoltan
` (5 preceding siblings ...)
2026-02-03 16:22 ` [PATCH v3 6/7] memory: Shorten memory_region_init_rom_device BALATON Zoltan
@ 2026-02-03 16:22 ` BALATON Zoltan
6 siblings, 0 replies; 8+ messages in thread
From: BALATON Zoltan @ 2026-02-03 16:22 UTC (permalink / raw)
To: qemu-devel
Cc: Peter Xu, Akihiko Odaki, Paolo Bonzini, Mark Cave-Ayland,
Gerd Hoffmann, Max Filippov, Peter Maydell,
Philippe Mathieu-Daudé
Introduce internal memory_region_do_init_ram_ptr() function to remove
duplicated code from different memory_region_init_ram_*ptr functions.
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
system/memory.c | 17 ++++++++++-------
1 file changed, 10 insertions(+), 7 deletions(-)
diff --git a/system/memory.c b/system/memory.c
index 74179463ea..4504f6fa05 100644
--- a/system/memory.c
+++ b/system/memory.c
@@ -1658,26 +1658,29 @@ bool memory_region_init_ram_from_fd(MemoryRegion *mr, Object *owner,
}
#endif
-void memory_region_init_ram_ptr(MemoryRegion *mr, Object *owner,
- const char *name, uint64_t size, void *ptr)
+static void memory_region_do_init_ram_ptr(MemoryRegion *mr, uint64_t size,
+ void *ptr)
{
- memory_region_init(mr, owner, name, size);
/* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */
assert(ptr != NULL);
mr->ram_block = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_abort);
memory_region_do_init_ram(mr, NULL, NULL);
}
+void memory_region_init_ram_ptr(MemoryRegion *mr, Object *owner,
+ const char *name, uint64_t size, void *ptr)
+{
+ memory_region_init(mr, owner, name, size);
+ memory_region_do_init_ram_ptr(mr, size, ptr);
+}
+
void memory_region_init_ram_device_ptr(MemoryRegion *mr, Object *owner,
const char *name, uint64_t size,
void *ptr)
{
memory_region_init(mr, owner, name, size);
memory_region_set_ops(mr, &ram_device_mem_ops, mr);
- /* qemu_ram_alloc_from_ptr cannot fail with ptr != NULL. */
- assert(ptr != NULL);
- mr->ram_block = qemu_ram_alloc_from_ptr(size, ptr, mr, &error_abort);
- memory_region_do_init_ram(mr, NULL, NULL);
+ memory_region_do_init_ram_ptr(mr, size, ptr);
mr->ram_device = true;
}
--
2.41.3
^ permalink raw reply related [flat|nested] 8+ messages in thread