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authorGerd Hoffmann <kraxel@redhat.com>2014-06-19 08:46:08 +0200
committerGerd Hoffmann <kraxel@redhat.com>2014-09-05 13:27:11 +0200
commita77549b3ffcc24c32ee4e8b5ec32049186120360 (patch)
treee0be32d88d5d3c4f1361cf525aa05112b5a3a87d /ui
parent30f1e661b640de58ba1e8178f7f2290179a7e01c (diff)
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console: add qemu_create_displaysurface_guestmem
This patch adds a qemu_create_displaysurface_guestmem helper function. Works simliar to qemu_create_displaysurface_from, but accepts a guest address instead of a host pointer and it handles cpu_physical_memory_{map,unmap} for you. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'ui')
-rw-r--r--ui/console.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/ui/console.c b/ui/console.c
index 968aaaf..654c0d3 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -28,6 +28,7 @@
#include "qmp-commands.h"
#include "sysemu/char.h"
#include "trace.h"
+#include "exec/memory.h"
#define DEFAULT_BACKSCROLL 512
#define CONSOLE_CURSOR_PERIOD 500
@@ -1270,6 +1271,42 @@ DisplaySurface *qemu_create_displaysurface_from(int width, int height,
return surface;
}
+static void qemu_unmap_displaysurface_guestmem(pixman_image_t *image,
+ void *unused)
+{
+ void *data = pixman_image_get_data(image);
+ uint32_t size = pixman_image_get_stride(image) *
+ pixman_image_get_height(image);
+ cpu_physical_memory_unmap(data, size, 0, 0);
+}
+
+DisplaySurface *qemu_create_displaysurface_guestmem(int width, int height,
+ pixman_format_code_t format,
+ int linesize, uint64_t addr)
+{
+ DisplaySurface *surface;
+ hwaddr size;
+ void *data;
+
+ if (linesize == 0) {
+ linesize = width * PIXMAN_FORMAT_BPP(format) / 8;
+ }
+
+ size = linesize * height;
+ data = cpu_physical_memory_map(addr, &size, 0);
+ if (size != linesize * height) {
+ cpu_physical_memory_unmap(data, size, 0, 0);
+ return NULL;
+ }
+
+ surface = qemu_create_displaysurface_from
+ (width, height, format, linesize, data);
+ pixman_image_set_destroy_function
+ (surface->image, qemu_unmap_displaysurface_guestmem, NULL);
+
+ return surface;
+}
+
static DisplaySurface *qemu_create_message_surface(int w, int h,
const char *msg)
{