ramfb: Add property to control if load the romfile

Currently the ramfb device loads the vgabios-ramfb.bin unconditionally,
but only the x86 need the vgabios-ramfb.bin, this can cause that when
use the release package on arm64 it can't find the vgabios-ramfb.bin.

Because only seabios will use the vgabios-ramfb.bin, load the rom logic
is x86-specific. For other !x86 platforms, the edk2 ships an EFI driver
for ramfb, so they don't need to load the romfile.

So add a new property use-legacy-x86-rom in both ramfb and vfio_pci
device, because the vfio display also use the ramfb_setup() to load
the vgabios-ramfb.bin file.

After have this property, the machine type can set the compatibility to
not load the vgabios-ramfb.bin if the arch doesn't need it.

For now the default value is true but it will be turned off by default
in subsequent patch when compats get properly handled.

Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Shaoqin Huang <shahuang@redhat.com>
Message-ID: <20250717100941.2230408-2-shahuang@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

diff --git a/hw/display/ramfb-standalone.c b/hw/display/ramfb-standalone.c
index 08f2d5db4eca49cdb831a36cd9f43614409b7991..82d8c69f890393f6c51820359cac1f4269da5726 100644 (file)
--- a/hw/display/ramfb-standalone.c
+++ b/hw/display/ramfb-standalone.c
@@ -17,6 +17,7 @@ struct RAMFBStandaloneState {
     QemuConsole *con;
     RAMFBState *state;
     bool migrate;
+    bool use_legacy_x86_rom;
 };
 
 static void display_update_wrapper(void *dev)
@@ -39,7 +40,7 @@ static void ramfb_realizefn(DeviceState *dev, Error **errp)
     RAMFBStandaloneState *ramfb = RAMFB(dev);
 
     ramfb->con = graphic_console_init(dev, 0, &wrapper_ops, dev);
-    ramfb->state = ramfb_setup(errp);
+    ramfb->state = ramfb_setup(ramfb->use_legacy_x86_rom, errp);
 }
 
 static bool migrate_needed(void *opaque)
@@ -62,6 +63,8 @@ static const VMStateDescription ramfb_dev_vmstate = {
 
 static const Property ramfb_properties[] = {
     DEFINE_PROP_BOOL("x-migrate", RAMFBStandaloneState, migrate,  true),
+    DEFINE_PROP_BOOL("use-legacy-x86-rom", RAMFBStandaloneState,
+                     use_legacy_x86_rom, true),
 };
 
 static void ramfb_class_initfn(ObjectClass *klass, const void *data)

diff --git a/hw/display/ramfb-stubs.c b/hw/display/ramfb-stubs.c
index cf64733b10cda2fd9bdcfacd6e4990a0123ec60f..b83551357bb3faafaa45d825b096de64de864d42 100644 (file)
--- a/hw/display/ramfb-stubs.c
+++ b/hw/display/ramfb-stubs.c
@@ -8,7 +8,7 @@ void ramfb_display_update(QemuConsole *con, RAMFBState *s)
 {
 }
 
-RAMFBState *ramfb_setup(Error **errp)
+RAMFBState *ramfb_setup(bool romfile, Error **errp)
 {
     error_setg(errp, "ramfb support not available");
     return NULL;

diff --git a/hw/display/ramfb.c b/hw/display/ramfb.c
index 8c0f907673da4c2b1776fde12fffa5015d8a8fda..9a17d97d076fb5683b1aeb953b2c1f5ba92f89bd 100644 (file)
--- a/hw/display/ramfb.c
+++ b/hw/display/ramfb.c
@@ -135,7 +135,7 @@ const VMStateDescription ramfb_vmstate = {
     }
 };
 
-RAMFBState *ramfb_setup(Error **errp)
+RAMFBState *ramfb_setup(bool romfile, Error **errp)
 {
     FWCfgState *fw_cfg = fw_cfg_find();
     RAMFBState *s;
@@ -147,7 +147,9 @@ RAMFBState *ramfb_setup(Error **errp)
 
     s = g_new0(RAMFBState, 1);
 
-    rom_add_vga("vgabios-ramfb.bin");
+    if (romfile) {
+        rom_add_vga("vgabios-ramfb.bin");
+    }
     fw_cfg_add_file_callback(fw_cfg, "etc/ramfb",
                              NULL, ramfb_fw_cfg_write, s,
                              &s->cfg, sizeof(s->cfg), false);

diff --git a/hw/vfio/display.c b/hw/vfio/display.c
index 9c6f5aa265dd75126d7fba82e3a1d5bd00a2bcf2..faacd9019a558ea35a8730696472e967d4196919 100644 (file)
--- a/hw/vfio/display.c
+++ b/hw/vfio/display.c
@@ -365,7 +365,7 @@ static bool vfio_display_dmabuf_init(VFIOPCIDevice *vdev, Error **errp)
                                           &vfio_display_dmabuf_ops,
                                           vdev);
     if (vdev->enable_ramfb) {
-        vdev->dpy->ramfb = ramfb_setup(errp);
+        vdev->dpy->ramfb = ramfb_setup(vdev->use_legacy_x86_rom, errp);
         if (!vdev->dpy->ramfb) {
             return false;
         }
@@ -494,7 +494,7 @@ static bool vfio_display_region_init(VFIOPCIDevice *vdev, Error **errp)
                                           &vfio_display_region_ops,
                                           vdev);
     if (vdev->enable_ramfb) {
-        vdev->dpy->ramfb = ramfb_setup(errp);
+        vdev->dpy->ramfb = ramfb_setup(vdev->use_legacy_x86_rom, errp);
         if (!vdev->dpy->ramfb) {
             return false;
         }

diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index 1093b28df7c3f5f37e622e6d76a99ad8d2b7e01e..0b969b3359dbb6988c67aa8d42e4892333af8097 100644 (file)
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -3809,6 +3809,8 @@ static const TypeInfo vfio_pci_dev_info = {
 
 static const Property vfio_pci_dev_nohotplug_properties[] = {
     DEFINE_PROP_BOOL("ramfb", VFIOPCIDevice, enable_ramfb, false),
+    DEFINE_PROP_BOOL("use-legacy-x86-rom", VFIOPCIDevice,
+                     use_legacy_x86_rom, true),
     DEFINE_PROP_ON_OFF_AUTO("x-ramfb-migrate", VFIOPCIDevice, ramfb_migrate,
                             ON_OFF_AUTO_AUTO),
 };

diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h
index 495fae737d3a2e455e1cc04e062b9860196899be..826db8c1319b9f4f1ec4597f7f5f8469ac3329cb 100644 (file)
--- a/hw/vfio/pci.h
+++ b/hw/vfio/pci.h
@@ -188,6 +188,7 @@ struct VFIOPCIDevice {
     bool no_kvm_ioeventfd;
     bool no_vfio_ioeventfd;
     bool enable_ramfb;
+    bool use_legacy_x86_rom;
     OnOffAuto ramfb_migrate;
     bool defer_kvm_irq_routing;
     bool clear_parent_atomics_on_exit;

diff --git a/include/hw/display/ramfb.h b/include/hw/display/ramfb.h
index a7e00191445e17522e978c50e135ad2c722dafc7..172aa6dc89e808dcc07e0751effd265efd34775d 100644 (file)
--- a/include/hw/display/ramfb.h
+++ b/include/hw/display/ramfb.h
@@ -6,7 +6,7 @@
 /* ramfb.c */
 typedef struct RAMFBState RAMFBState;
 void ramfb_display_update(QemuConsole *con, RAMFBState *s);
-RAMFBState *ramfb_setup(Error **errp);
+RAMFBState *ramfb_setup(bool romfile, Error **errp);
 
 extern const VMStateDescription ramfb_vmstate;