qemu: add support for io_uring

pkgs/applications/virtualization/qemu/default.nix

@@ -23,6 +23,7 @@
 , libiscsiSupport ? true, libiscsi
 , smbdSupport ? false, samba
 , tpmSupport ? true
+, uringSupport ? stdenv.isLinux, liburing
 , hostCpuOnly ? false
 , hostCpuTargets ? (if hostCpuOnly
                     then (lib.optional stdenv.isx86_64 "i386-softmmu"
@@ -77,7 +78,8 @@ stdenv.mkDerivation rec {
     ++ lib.optionals openGLSupport [ mesa epoxy libdrm ]
     ++ lib.optionals virglSupport [ virglrenderer ]
     ++ lib.optionals libiscsiSupport [ libiscsi ]
-    ++ lib.optionals smbdSupport [ samba ];
+    ++ lib.optionals smbdSupport [ samba ]
+    ++ lib.optionals uringSupport [ liburing ];
 
   dontUseMesonConfigure = true; # meson's configurePhase isn't compatible with qemu build
 
@@ -191,7 +193,8 @@ stdenv.mkDerivation rec {
     ++ lib.optional virglSupport "--enable-virglrenderer"
     ++ lib.optional tpmSupport "--enable-tpm"
     ++ lib.optional libiscsiSupport "--enable-libiscsi"
-    ++ lib.optional smbdSupport "--smbd=${samba}/bin/smbd";
+    ++ lib.optional smbdSupport "--smbd=${samba}/bin/smbd"
+    ++ lib.optional uringSupport "--enable-linux-io-uring";
 
   doCheck = false; # tries to access /dev
   dontWrapGApps = true;