From 48ecfbf12c1f51281aaabaf8e03494291a18862c Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Fri, 30 Apr 2021 13:35:46 +0200 Subject: [PATCH] modules: add have_vga Introduce a symbol which can be used to prevent display modules which need vga support being loaded into system emulators with CONFIG_VGA=n. Signed-off-by: Gerd Hoffmann Message-id: 20210430113547.1816178-1-kraxel@redhat.com Message-Id: <20210430113547.1816178-16-kraxel@redhat.com> --- hw/display/vga.c | 2 ++ include/hw/display/vga.h | 6 ++++++ 2 files changed, 8 insertions(+) diff --git a/hw/display/vga.c b/hw/display/vga.c index 836ad50c7b..28a90e30d0 100644 --- a/hw/display/vga.c +++ b/hw/display/vga.c @@ -39,6 +39,8 @@ //#define DEBUG_VGA_MEM //#define DEBUG_VGA_REG +bool have_vga = true; + /* 16 state changes per vertical frame @60 Hz */ #define VGA_TEXT_CURSOR_PERIOD_MS (1000 * 2 * 16 / 60) diff --git a/include/hw/display/vga.h b/include/hw/display/vga.h index ca0003dbfd..5f7825e0e3 100644 --- a/include/hw/display/vga.h +++ b/include/hw/display/vga.h @@ -11,6 +11,12 @@ #include "exec/hwaddr.h" +/* + * modules can reference this symbol to avoid being loaded + * into system emulators without vga support + */ +extern bool have_vga; + enum vga_retrace_method { VGA_RETRACE_DUMB, VGA_RETRACE_PRECISE