On Tue, Jun 21, 2016 at 12:36:06PM +0100, Chris Wilson wrote:
> +static bool is_gvt_enabled(void)
> +{
> + FILE *file;
> + int value;
> + bool enabled = false;
> +
> + file = fopen("/sys/module/i915/parameters/enable_gvt", "r");
> + if (!file)
> + return false;
> +
> + if (fscanf(file, "%d", &value) == 1)
> + enabled = value;
> + fclose(file);
> +
> + errno = 0;
> + return enabled;
> +}
> +
> +static void unbind_fbcon(void)
> +{
> + char buf[128];
> + const char *path = "/sys/class/vtconsole";
> + DIR *dir;
> + struct dirent *vtcon;
> +
> + dir = opendir(path);
> + if (!dir)
> + return;
> +
> + while ((vtcon = readdir(dir))) {
> + int fd, len;
> +
> + if (strncmp(vtcon->d_name, "vtcon", 5))
> + continue;
> +
> + sprintf(buf, "%s/%s/name", path, vtcon->d_name);
> + fd = open(buf, O_RDONLY);
> + if (fd < 0)
> + continue;
> +
> + len = read(fd, buf, sizeof(buf) - 1);
> + close(fd);
> + if (len >= 0)
> + buf[len] = '\0';
> +
> + if (strstr(buf, "frame buffer device")) {
> + sprintf(buf, "%s/%s/bind", path, vtcon->d_name);
> + fd = open(buf, O_WRONLY);
> + if (fd != -1) {
> + buf[0] = '1';
> + buf[1] = '\n';
> + write(fd, buf, 2);
> + close(fd);
> + }
> + break;
> + }
> + }
> + closedir(dir);
> +}
> +
> +static void unload_i915(void)
> +{
> + unbind_fbcon();
> + /* pkill alsact */
> +
> + system("/sbin/modprobe -s -r i915");
> +}
> +
> +bool igt_gvt_load_module(void)
> +{
> + if (is_gvt_enabled())
> + return true;
> +
> + unload_i915();
> + system("/sbin/modprobe -s i915 enable_gvt=1");
> +
> + return is_gvt_enabled();
Would it be safe to put igt_gvt_unload_module() into an exit handler?
> +}
> +
> +void igt_gvt_unload_module(void)
> +{
> + if (!is_gvt_enabled())
> + return;
> +
> + unload_i915();
> + system("/sbin/modprobe -s i915 enable_gvt=0");
> +
> + igt_assert(!is_gvt_enabled());
> +}
--
Chris Wilson, Intel Open Source Technology Centre
_______________________________________________
Intel-gfx mailing list
Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
