From 8ae52b000f14d2646238b3544178bdb7d5dd84f3 Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Thu, 4 Dec 2008 21:51:22 +0200 Subject: Avoid resetting vga dirty logging unnecessarily cirrus bitblt reset will stop and start dirty logging even when there is no need; this causes full redraws. avoid by only updating memory access when exiting cpu-to-video update mode. Signed-off-by: Avi Kivity --- hw/cirrus_vga.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/hw/cirrus_vga.c b/hw/cirrus_vga.c index 6164f2bd5..752904222 100644 --- a/hw/cirrus_vga.c +++ b/hw/cirrus_vga.c @@ -860,11 +860,17 @@ static void cirrus_bitblt_cputovideo_next(CirrusVGAState * s) static void cirrus_bitblt_reset(CirrusVGAState * s) { + int need_update; + s->gr[0x31] &= ~(CIRRUS_BLT_START | CIRRUS_BLT_BUSY | CIRRUS_BLT_FIFOUSED); + need_update = s->cirrus_srcptr != &s->cirrus_bltbuf[0] + || s->cirrus_srcptr_end != &s->cirrus_bltbuf[0]; s->cirrus_srcptr = &s->cirrus_bltbuf[0]; s->cirrus_srcptr_end = &s->cirrus_bltbuf[0]; s->cirrus_srccounter = 0; + if (!need_update) + return; cirrus_update_memory_access(s); } -- cgit v1.2.3