This patch adds support for SDL based framebuffer. Use the '--sdl' command line
option to enable the feature.
Cc: Cyrill Gorcunov <gorcu...@gmail.com>
Cc: Ingo Molnar <mi...@elte.hu>
Cc: John Floren <j...@jfloren.net>
Cc: Sasha Levin <levinsasha...@gmail.com>
Signed-off-by: Pekka Enberg <penb...@kernel.org>
---
tools/kvm/Makefile | 8 ++++
tools/kvm/config/feature-tests.mak | 10 +++++
tools/kvm/include/kvm/sdl.h | 14 +++++++
tools/kvm/kvm-run.c | 17 +++++++--
tools/kvm/ui/sdl.c | 71 ++++++++++++++++++++++++++++++++++++
5 files changed, 116 insertions(+), 4 deletions(-)
create mode 100644 tools/kvm/include/kvm/sdl.h
create mode 100644 tools/kvm/ui/sdl.c
diff --git a/tools/kvm/Makefile b/tools/kvm/Makefile
index 17c795b..55949aa 100644
--- a/tools/kvm/Makefile
+++ b/tools/kvm/Makefile
@@ -71,6 +71,14 @@ ifeq ($(has_vncserver),y)
LIBS += -lvncserver
endif
+FLAGS_SDL=$(CFLAGS) -lSDL
+has_SDL := $(call try-cc,$(SOURCE_SDL),$(FLAGS_SDL))
+ifeq ($(has_SDL),y)
+ OBJS += ui/sdl.o
+ CFLAGS += -DCONFIG_HAS_SDL
+ LIBS += -lSDL
+endif
+
DEPS := $(patsubst %.o,%.d,$(OBJS))
# Exclude BIOS object files from header dependencies.
diff --git a/tools/kvm/config/feature-tests.mak
b/tools/kvm/config/feature-tests.mak
index 0801b54..bfd10ca 100644
--- a/tools/kvm/config/feature-tests.mak
+++ b/tools/kvm/config/feature-tests.mak
@@ -136,3 +136,13 @@ int main(void)
return 0;
}
endef
+
+define SOURCE_SDL
+#include <SDL/SDL.h>
+
+int main(void)
+{
+ SDL_Init(SDL_INIT_VIDEO);
+ return 0;
+}
+endef
diff --git a/tools/kvm/include/kvm/sdl.h b/tools/kvm/include/kvm/sdl.h
new file mode 100644
index 0000000..7057770
--- /dev/null
+++ b/tools/kvm/include/kvm/sdl.h
@@ -0,0 +1,14 @@
+#ifndef KVM__SDL_H
+#define KVM__SDL_H
+
+struct framebuffer;
+
+#ifdef CONFIG_HAS_SDL
+void sdl__init(struct framebuffer *fb);
+#else
+static inline void sdl__init(struct framebuffer *fb)
+{
+}
+#endif
+
+#endif /* KVM__SDL_H */
diff --git a/tools/kvm/kvm-run.c b/tools/kvm/kvm-run.c
index e6e180b..8398287 100644
--- a/tools/kvm/kvm-run.c
+++ b/tools/kvm/kvm-run.c
@@ -32,6 +32,7 @@
#include <kvm/ioeventfd.h>
#include <kvm/i8042.h>
#include <kvm/vnc.h>
+#include <kvm/sdl.h>
#include <kvm/framebuffer.h>
/* header files for gitish interface */
@@ -72,6 +73,7 @@ static const char *virtio_9p_dir;
static bool single_step;
static bool readonly_image[MAX_DISK_IMAGES];
static bool vnc;
+static bool sdl;
extern bool ioport_debug;
extern int active_console;
@@ -117,6 +119,7 @@ static const struct option options[] = {
OPT_STRING('\0', "virtio-9p", &virtio_9p_dir, "root dir",
"Enable 9p over virtio"),
OPT_BOOLEAN('\0', "vnc", &vnc, "Enable VNC framebuffer"),
+ OPT_BOOLEAN('\0', "sdl", &sdl, "Enable SDL framebuffer"),
OPT_GROUP("Kernel options:"),
OPT_STRING('k', "kernel", &kernel_filename, "kernel",
@@ -538,7 +541,7 @@ int kvm_cmd_run(int argc, const char **argv, const char
*prefix)
memset(real_cmdline, 0, sizeof(real_cmdline));
strcpy(real_cmdline, "notsc noapic noacpi pci=conf1");
- if (vnc) {
+ if (vnc || sdl) {
strcat(real_cmdline, " video=vesafb console=tty0");
vidmode = 0x312;
} else {
@@ -630,13 +633,19 @@ int kvm_cmd_run(int argc, const char **argv, const char
*prefix)
kvm__init_ram(kvm);
+ if (vnc || sdl)
+ fb = vesa__init(kvm);
+
if (vnc) {
kbd__init(kvm);
- fb = vesa__init(kvm);
+ if (fb)
+ vnc__init(fb);
}
- if (fb)
- vnc__init(fb);
+ if (sdl) {
+ if (fb)
+ sdl__init(fb);
+ }
fb__start();
diff --git a/tools/kvm/ui/sdl.c b/tools/kvm/ui/sdl.c
new file mode 100644
index 0000000..8bc3f68
--- /dev/null
+++ b/tools/kvm/ui/sdl.c
@@ -0,0 +1,71 @@
+#include "kvm/sdl.h"
+
+#include "kvm/framebuffer.h"
+#include "kvm/util.h"
+
+#include <SDL/SDL.h>
+#include <pthread.h>
+
+static void sdl__write(struct framebuffer *fb, u64 addr, u8 *data, u32 len)
+{
+ memcpy(&fb->mem[addr - fb->mem_addr], data, len);
+}
+
+static void *sdl__thread(void *p)
+{
+ Uint32 rmask, gmask, bmask, amask;
+ struct framebuffer *fb = p;
+ SDL_Surface *guest_screen;
+ SDL_Surface *screen;
+ SDL_Event ev;
+
+ if (SDL_Init(SDL_INIT_VIDEO) != 0)
+ die("Unable to initialize SDL");
+
+ rmask = 0x000000ff;
+ gmask = 0x0000ff00;
+ bmask = 0x00ff0000;
+ amask = 0x00000000;
+
+ guest_screen = SDL_CreateRGBSurfaceFrom(fb->mem, fb->width, fb->height,
fb->depth, fb->width * fb->depth / 8, rmask, gmask, bmask, amask);
+ if (!guest_screen)
+ die("Unable to create SDL RBG surface");
+
+ screen = SDL_SetVideoMode(fb->width, fb->height, fb->depth,
SDL_SWSURFACE);
+ if (!screen)
+ die("Unable to set SDL video mode");
+
+ for (;;) {
+ SDL_BlitSurface(guest_screen, NULL, screen, NULL);
+ SDL_Flip(screen);
+
+ while (SDL_PollEvent(&ev)) {
+ switch (ev.type) {
+ case SDL_QUIT:
+ goto exit;
+ }
+ }
+ }
+exit:
+ return NULL;
+}
+
+static int sdl__start(struct framebuffer *fb)
+{
+ pthread_t thread;
+
+ if (pthread_create(&thread, NULL, sdl__thread, fb) != 0)
+ return -1;
+
+ return 0;
+}
+
+static struct fb_target_operations sdl_ops = {
+ .start = sdl__start,
+ .write = sdl__write,
+};
+
+void sdl__init(struct framebuffer *fb)
+{
+ fb__attach(fb, &sdl_ops);
+}
--
1.7.0.4
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