From: Philippe Mathieu-Daudé Date: Thu, 28 Nov 2024 17:54:09 +0000 (+0100) Subject: hw/display/vga: Do not reset 'big_endian_fb' in vga_common_reset() X-Git-Tag: v9.2.0-rc3~2^2~4 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=302075f85e29d6e658aeec75f50a90eec23f3726;p=thirdparty%2Fqemu.git hw/display/vga: Do not reset 'big_endian_fb' in vga_common_reset() The 'pci-vga' device allow setting a 'big-endian-framebuffer' property since commit 3c2784fc864 ("vga: Expose framebuffer byteorder as a QOM property"). Similarly, the 'virtio-vga' device since commit 8be61ce2ce3 ("virtio-vga: implement big-endian-framebuffer property"). Both call vga_common_reset() in their reset handler, respectively pci_secondary_vga_reset() and virtio_vga_base_reset_hold(), which reset 'big_endian_fb', overwritting the property. This is not correct: the hardware is expected to keep its configured endianness during resets. Move 'big_endian_fb' assignment from vga_common_reset() to vga_common_init() which is called once when the common VGA state is initialized. Signed-off-by: Philippe Mathieu-Daudé Acked-by: Benjamin Herrenschmidt Message-Id: <20241129101721.17836-2-philmd@linaro.org> --- diff --git a/hw/display/vga.c b/hw/display/vga.c index 892fedc8dce..b074b58c90d 100644 --- a/hw/display/vga.c +++ b/hw/display/vga.c @@ -1873,7 +1873,6 @@ void vga_common_reset(VGACommonState *s) s->cursor_start = 0; s->cursor_end = 0; s->cursor_offset = 0; - s->big_endian_fb = s->default_endian_fb; memset(s->invalidated_y_table, '\0', sizeof(s->invalidated_y_table)); memset(s->last_palette, '\0', sizeof(s->last_palette)); memset(s->last_ch_attr, '\0', sizeof(s->last_ch_attr)); @@ -2266,6 +2265,7 @@ bool vga_common_init(VGACommonState *s, Object *obj, Error **errp) * all target endian dependencies from this file. */ s->default_endian_fb = target_words_bigendian(); + s->big_endian_fb = s->default_endian_fb; vga_dirty_log_start(s);