Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 128 insertions, 0 deletions

diff --git a/qemu-edid.c b/qemu-edid.c
new file mode 100644
index 000000000..c3a9fba10
--- /dev/null
+++ b/qemu-edid.c
@@ -0,0 +1,128 @@
+/*
+ * QEMU EDID test tool.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+#include "qemu/osdep.h"
+#include "qemu/bswap.h"
+#include "qemu/cutils.h"
+#include "hw/display/edid.h"
+
+static qemu_edid_info info = {
+    .prefx = 1024,
+    .prefy = 768,
+};
+
+static void usage(FILE *out)
+{
+    fprintf(out,
+            "\n"
+            "This is a test tool for the qemu edid generator.\n"
+            "\n"
+            "Typically you'll pipe the output into edid-decode\n"
+            "to check if the generator works correctly.\n"
+            "\n"
+            "usage: qemu-edid <options>\n"
+            "options:\n"
+            "    -h             print this text\n"
+            "    -o <file>      set output file (stdout by default)\n"
+            "    -v <vendor>    set monitor vendor (three letters)\n"
+            "    -n <name>      set monitor name\n"
+            "    -s <serial>    set monitor serial\n"
+            "    -d <dpi>       set display resolution\n"
+            "    -x <prefx>     set preferred width\n"
+            "    -y <prefy>     set preferred height\n"
+            "    -X <maxx>      set maximum width\n"
+            "    -Y <maxy>      set maximum height\n"
+            "\n");
+}
+
+int main(int argc, char *argv[])
+{
+    FILE *outfile = NULL;
+    uint8_t blob[512];
+    size_t size;
+    uint32_t dpi = 100;
+    int rc;
+
+    for (;;) {
+        rc = getopt(argc, argv, "ho:x:y:X:Y:d:v:n:s:");
+        if (rc == -1) {
+            break;
+        }
+        switch (rc) {
+        case 'o':
+            if (outfile) {
+                fprintf(stderr, "outfile specified twice\n");
+                exit(1);
+            }
+            outfile = fopen(optarg, "w");
+            if (outfile == NULL) {
+                fprintf(stderr, "open %s: %s\n", optarg, strerror(errno));
+                exit(1);
+            }
+            break;
+        case 'x':
+            if (qemu_strtoui(optarg, NULL, 10, &info.prefx) < 0) {
+                fprintf(stderr, "not a number: %s\n", optarg);
+                exit(1);
+            }
+            break;
+        case 'y':
+            if (qemu_strtoui(optarg, NULL, 10, &info.prefy) < 0) {
+                fprintf(stderr, "not a number: %s\n", optarg);
+                exit(1);
+            }
+            break;
+        case 'X':
+            if (qemu_strtoui(optarg, NULL, 10, &info.maxx) < 0) {
+                fprintf(stderr, "not a number: %s\n", optarg);
+                exit(1);
+            }
+            break;
+        case 'Y':
+            if (qemu_strtoui(optarg, NULL, 10, &info.maxy) < 0) {
+                fprintf(stderr, "not a number: %s\n", optarg);
+                exit(1);
+            }
+            break;
+        case 'd':
+            if (qemu_strtoui(optarg, NULL, 10, &dpi) < 0) {
+                fprintf(stderr, "not a number: %s\n", optarg);
+                exit(1);
+            }
+            break;
+        case 'v':
+            info.vendor = optarg;
+            break;
+        case 'n':
+            info.name = optarg;
+            break;
+        case 's':
+            info.serial = optarg;
+            break;
+        case 'h':
+            usage(stdout);
+            exit(0);
+        default:
+            usage(stderr);
+            exit(1);
+        }
+    }
+
+    if (outfile == NULL) {
+        outfile = stdout;
+    }
+
+    info.width_mm = qemu_edid_dpi_to_mm(dpi, info.prefx);
+    info.height_mm = qemu_edid_dpi_to_mm(dpi, info.prefy);
+
+    memset(blob, 0, sizeof(blob));
+    qemu_edid_generate(blob, sizeof(blob), &info);
+    size = qemu_edid_size(blob);
+    fwrite(blob, size, 1, outfile);
+    fflush(outfile);
+
+    exit(0);
+}