On Mon, 23 Feb 2026, Philippe Mathieu-Daudé wrote:
If a dimension is not set, have the machine init code set
the default value by calling the ppc_graphic_dimensions()
helper, common to all PowerPC machines. Declare local
variables to avoid using the global ones.

Signed-off-by: Philippe Mathieu-Daudé <[email protected]>
Reviewed-by: Richard Henderson <[email protected]>
Message-Id: <[email protected]>
---
include/hw/ppc/ppc.h    |  2 ++
hw/ppc/mac_newworld.c   | 10 ++++++----
hw/ppc/mac_oldworld.c   | 10 ++++++----
hw/ppc/ppc.c            |  8 ++++++++
hw/ppc/prep.c           |  4 ++++
hw/ppc/spapr.c          |  4 ++++
system/globals-target.c |  6 ------
7 files changed, 30 insertions(+), 14 deletions(-)

diff --git a/include/hw/ppc/ppc.h b/include/hw/ppc/ppc.h
index cb51d704c6d..14cc09ab22b 100644
--- a/include/hw/ppc/ppc.h
+++ b/include/hw/ppc/ppc.h
@@ -102,6 +102,8 @@ enum {
    ARCH_MAC99_U3,
};

+void ppc_graphic_dimensions(int *width, int *height, int *depth);
+
#define FW_CFG_PPC_WIDTH        (FW_CFG_ARCH_LOCAL + 0x00)
#define FW_CFG_PPC_HEIGHT       (FW_CFG_ARCH_LOCAL + 0x01)
#define FW_CFG_PPC_DEPTH        (FW_CFG_ARCH_LOCAL + 0x02)
diff --git a/hw/ppc/mac_newworld.c b/hw/ppc/mac_newworld.c
index 7275563a155..daf0029c01a 100644
--- a/hw/ppc/mac_newworld.c
+++ b/hw/ppc/mac_newworld.c
@@ -156,6 +156,7 @@ static void ppc_core99_init(MachineState *machine)
    DeviceState *uninorth_internal_dev = NULL, *uninorth_agp_dev = NULL;
    hwaddr nvram_addr = 0xFFF04000;
    uint64_t tbfreq = kvm_enabled() ? kvmppc_get_tbfreq() : TBFREQ;
+    int graphic_width, graphic_height, graphic_depth;

    /* init CPUs */
    for (i = 0; i < machine->smp.cpus; i++) {
@@ -432,10 +433,6 @@ static void ppc_core99_init(MachineState *machine)

    pci_vga_init(pci_bus);

-    if (graphic_depth != 15 && graphic_depth != 32 && graphic_depth != 8) {
-        graphic_depth = 15;
-    }
-
    pci_init_nic_devices(pci_bus, mc->default_nic);

    /* The NewWorld NVRAM is not located in the MacIO device */
@@ -480,6 +477,11 @@ static void ppc_core99_init(MachineState *machine)
    fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_SIZE, initrd_size);
    fw_cfg_add_i16(fw_cfg, FW_CFG_BOOT_DEVICE, ppc_boot_device);

+    ppc_graphic_dimensions(&graphic_width, &graphic_height, &graphic_depth);
+    if (graphic_depth != 15 && graphic_depth != 32 && graphic_depth != 8) {
+        graphic_depth = 15;
+    }
+
    fw_cfg_add_i16(fw_cfg, FW_CFG_PPC_WIDTH, graphic_width);
    fw_cfg_add_i16(fw_cfg, FW_CFG_PPC_HEIGHT, graphic_height);
    fw_cfg_add_i16(fw_cfg, FW_CFG_PPC_DEPTH, graphic_depth);
diff --git a/hw/ppc/mac_oldworld.c b/hw/ppc/mac_oldworld.c
index e679d338985..ea1f778877c 100644
--- a/hw/ppc/mac_oldworld.c
+++ b/hw/ppc/mac_oldworld.c
@@ -108,6 +108,7 @@ static void ppc_heathrow_init(MachineState *machine)
    DriveInfo *dinfo, *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
    void *fw_cfg;
    uint64_t tbfreq = kvm_enabled() ? kvmppc_get_tbfreq() : TBFREQ;
+    int graphic_width, graphic_height, graphic_depth;

    /* init CPUs */
    for (i = 0; i < machine->smp.cpus; i++) {
@@ -288,10 +289,6 @@ static void ppc_heathrow_init(MachineState *machine)
        pci_create_simple(pci_bus, -1, "pci-ohci");
    }

-    if (graphic_depth != 15 && graphic_depth != 32 && graphic_depth != 8) {
-        graphic_depth = 15;
-    }
-
    /* No PCI init: the BIOS will do it */

    dev = qdev_new(TYPE_FW_CFG_MEM);
@@ -321,6 +318,11 @@ static void ppc_heathrow_init(MachineState *machine)
    fw_cfg_add_i32(fw_cfg, FW_CFG_INITRD_SIZE, initrd_size);
    fw_cfg_add_i16(fw_cfg, FW_CFG_BOOT_DEVICE, ppc_boot_device);

+    ppc_graphic_dimensions(&graphic_width, &graphic_height, &graphic_depth);
+    if (graphic_depth != 15 && graphic_depth != 32 && graphic_depth != 8) {
+        graphic_depth = 15;
+    }
+
    fw_cfg_add_i16(fw_cfg, FW_CFG_PPC_WIDTH, graphic_width);
    fw_cfg_add_i16(fw_cfg, FW_CFG_PPC_HEIGHT, graphic_height);
    fw_cfg_add_i16(fw_cfg, FW_CFG_PPC_DEPTH, graphic_depth);
diff --git a/hw/ppc/ppc.c b/hw/ppc/ppc.c
index a512d4fa647..d7b4466d701 100644
--- a/hw/ppc/ppc.c
+++ b/hw/ppc/ppc.c
@@ -29,6 +29,7 @@
#include "qemu/timer.h"
#include "exec/cpu-interrupt.h"
#include "system/cpus.h"
+#include "system/system.h"
#include "qemu/log.h"
#include "qemu/main-loop.h"
#include "qemu/error-report.h"
@@ -1557,3 +1558,10 @@ void ppc_irq_reset(PowerPCCPU *cpu)
        kvmppc_set_interrupt(cpu, PPC_INTERRUPT_EXT, 0);
    }
}
+
+void ppc_graphic_dimensions(int *width, int *height, int *depth)
+{
+    *width = graphic_width ?: 800;
+    *height = graphic_height ?: 600;
+    *depth = graphic_depth ?: 32;
+}

Sorry but didn't we say that there should be no common ppc_graphic_dimensions function but each board should set its own defaults?

Regards,
BALATON Zoltan

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