From 8be61ce2ce324d726e327101ca95332e32419fea Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Mon, 28 Sep 2020 10:53:34 +0200
Subject: [PATCH] virtio-vga: implement big-endian-framebuffer property
Allows to switch the (vga mode) framebuffer into bigendian mode
by setting the property, simliar to stdvga.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20200928085335.21961-2-kraxel@redhat.com
---
hw/display/virtio-vga.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/hw/display/virtio-vga.c b/hw/display/virtio-vga.c
index f9410a0c2e6..81f776ee36e 100644
--- a/hw/display/virtio-vga.c
+++ b/hw/display/virtio-vga.c
@@ -168,6 +168,20 @@ static void virtio_vga_base_reset(DeviceState *dev)
vga_dirty_log_start(&vvga->vga);
}
+static bool virtio_vga_get_big_endian_fb(Object *obj, Error **errp)
+{
+ VirtIOVGABase *d = VIRTIO_VGA_BASE(obj);
+
+ return d->vga.big_endian_fb;
+}
+
+static void virtio_vga_set_big_endian_fb(Object *obj, bool value, Error **errp)
+{
+ VirtIOVGABase *d = VIRTIO_VGA_BASE(obj);
+
+ d->vga.big_endian_fb = value;
+}
+
static Property virtio_vga_base_properties[] = {
DEFINE_VIRTIO_GPU_PCI_PROPERTIES(VirtIOPCIProxy),
DEFINE_PROP_END_OF_LIST(),
@@ -190,6 +204,11 @@ static void virtio_vga_base_class_init(ObjectClass *klass, void *data)
k->realize = virtio_vga_base_realize;
pcidev_k->romfile = "vgabios-virtio.bin";
pcidev_k->class_id = PCI_CLASS_DISPLAY_VGA;
+
+ /* Expose framebuffer byteorder via QOM */
+ object_class_property_add_bool(klass, "big-endian-framebuffer",
+ virtio_vga_get_big_endian_fb,
+ virtio_vga_set_big_endian_fb);
}
static TypeInfo virtio_vga_base_info = {
--
GitLab