diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2024-04-02 12:25:57 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2024-04-02 18:08:59 +0200 |
| commit | 3b6d2b1962b23295c463f010ff88eb5a594f2ef9 (patch) | |
| tree | e12df109d13f46438190d8c75e2238f0ff5aa8a8 /hw/display | |
| parent | 3826a372e4aafac1dba9ba3434e7c2f76775de42 (diff) | |
| download | qemu-3b6d2b1962b23295c463f010ff88eb5a594f2ef9.zip qemu-3b6d2b1962b23295c463f010ff88eb5a594f2ef9.tar.gz qemu-3b6d2b1962b23295c463f010ff88eb5a594f2ef9.tar.bz2 | |
vga: adjust dirty memory region if pel panning is active
When pel panning is active, one more byte is read from each of the VGA
memory planes. This has to be accounted in the computation of region_end,
otherwise vga_draw_graphic() fails an assertion:
qemu-system-i386: ../system/physmem.c:946: cpu_physical_memory_snapshot_get_dirty: Assertion `start + length <= snap->end' failed.
Reported-by: Helge Konetzka <hk@zapateado.de>
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2244
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hw/display')
| -rw-r--r-- | hw/display/vga.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/hw/display/vga.c b/hw/display/vga.c index b4ceff7..40acd19 100644 --- a/hw/display/vga.c +++ b/hw/display/vga.c @@ -1571,11 +1571,15 @@ static void vga_draw_graphic(VGACommonState *s, int full_update) break; } } + hpel = bits <= 8 ? s->params.hpel : 0; region_start = (s->params.start_addr * 4); region_end = region_start + (ram_addr_t)s->params.line_offset * height; region_end += width * depth / 8; /* scanline length */ region_end -= s->params.line_offset; + if (hpel) { + region_end += 4; + } if (region_end > s->vbe_size || depth == 0 || depth == 15) { /* * We land here on: @@ -1660,7 +1664,6 @@ static void vga_draw_graphic(VGACommonState *s, int full_update) width, height, v, line_offset, s->cr[9], s->cr[VGA_CRTC_MODE], s->params.line_compare, sr(s, VGA_SEQ_CLOCK_MODE)); #endif - hpel = bits <= 8 ? s->params.hpel : 0; addr1 = (s->params.start_addr * 4); bwidth = DIV_ROUND_UP(width * bits, 8); if (hpel) { |