From 05ece98f965997649b8d922d224240459bcc1403 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Dennis=20W=C3=B6lfing?= Date: Mon, 7 Jun 2021 13:53:03 +0200 Subject: [PATCH] vga: Allow writing VBE_DISPI_ID5 to ID register MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The highest VBE_DISPI_INDEX_ID version supported by QEMU is VBE_DISPI_ID5. But currently QEMU only allows writing values up to VBE_DISPI_ID4 to the VBE_DISPI_INDEX_ID register. As a result of this when a lower version is written to this register and later VBE_DISPI_ID5 is written back, reads from the register will continue to report the lower version. Indeed SeaBIOS is doing that during VGA initialization which causes guests to always read VBE_DISPI_ID0 instead of the correct version. Signed-off-by: Dennis Wölfing Message-Id: <20210607115303.228659-1-denniswoelfing@gmx.de> Signed-off-by: Gerd Hoffmann --- hw/display/vga.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/hw/display/vga.c b/hw/display/vga.c index 28a90e30d0..9d1f66af40 100644 --- a/hw/display/vga.c +++ b/hw/display/vga.c @@ -752,7 +752,8 @@ void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val) val == VBE_DISPI_ID1 || val == VBE_DISPI_ID2 || val == VBE_DISPI_ID3 || - val == VBE_DISPI_ID4) { + val == VBE_DISPI_ID4 || + val == VBE_DISPI_ID5) { s->vbe_regs[s->vbe_index] = val; } break;